Attachment 11 UFGS 32 01 19.61.pdf

USACE / NAVFAC / AFCEC / NASA UFGS- 32 01 19. 61 ( November 2019) Pr epar i ng Act i v i t y: NAVFAC Super sedi ng UFGS- 32 01 19. 61 ( Apr i l 2006)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Jul y 2020

SECTION TABLE OF CONTENTS

DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 01 19.61

SEALING OF JOINTS IN RIGID PAVEMENT

11/19

PART 1 GENERAL

1.1 UNIT PRICES

1.1.1 Measurement

1.1.2 Payment

1.2 REFERENCES

1.3 SUBMITTALS

1.4 QUALITY ASSURANCE

1.4.1 Test Requirements

1.4.2 Trial Joint Sealant Installation

1.5 DELIVERY, STORAGE, AND HANDLING

1.6 ENVIRONMENTAL REQUIREMENTS

1.7 TRAFFIC CONTROL

PART 2 PRODUCTS

2.1 SEALANTS

2.2 PRIMERS

2.3 BOND BREAKERS

2.3.1 Blocking Media/Backup Materials

2.3.2 Bond Breaking Tapes

PART 3 EXECUTION

3.1 EXECUTING EQUIPMENT

3.1.1 Joint Cleaning Equipment

3.1.1.1 Tractor-Mounted Routing and Plowing Tool

3.1.1.2 Concrete Saw

3.1.1.3 Sandblasting Equipment

3.1.1.4 Waterblasting Equipment

3.1.1.5 Air Compressor

3.1.1.6 Vacuum Sweeper

3.1.1.7 Hand Tools

3.1.2 Sealing Equipment

3.1.2.1 Hot-Poured Sealing Equipment

3.1.2.2 Cold-Applied, Single-Component Sealing Equipment

SECTION 32 01 19.61 Page 1

3.2 SAFETY

3.3 PREPARATION OF JOINTS

3.3.1 Existing Sealant Removal

3.3.2 Sawing

3.3.2.1 Refacing of Joints

3.3.2.2 Refacing of Random Cracks

3.3.3 Final Cleaning of Joints

3.3.3.1 Sandblasting

3.3.4 Bond Breaker

3.3.4.1 Blocking Media (Backer Rod) (Except for Expansion Joints)

3.3.4.2 Bond Breaking Tape

3.3.5 Rate of Progress of Joint Preparation

3.3.6 Disposal of Debris

3.4 PREPARATION OF SEALANT

3.4.1 Hot-Poured Sealants

3.4.2 Single-Component, Cold-Applied Sealants

3.5 INSTALLATION OF SEALANT

3.5.1 Time of Application

3.5.2 Sealing Joints

3.6 INSPECTION/FIELD QUALITY CONTROL

3.6.1 Joint Cleaning

3.6.2 Sampling Sealant

3.6.3 Sealant Application Equipment

3.6.4 Joint Sealant

3.7 ACCEPTANCE

3.8 CLEAN-UP

-- End of Section Table of Contents --

SECTION 32 01 19.61 Page 2

USACE / NAVFAC / AFCEC / NASA UFGS- 32 01 19. 61 ( November 2019) Pr epar i ng Act i v i t y: NAVFAC Super sedi ng UFGS- 32 01 19. 61 ( Apr i l 2006)

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Jul y 2020

SECTION 32 01 19.61

SEALING OF JOINTS IN RIGID PAVEMENT

11/19

NOTE: Thi s gui de speci f i cat i on cover s t he r equi r ement s f or f i el d mol ded seal ant s i n seal i ng or r eseal i ng j oi nt s i n r i gi d pavement s on ai r f i el ds, r oads, st r eet s, and ot her ar eas.

Adher e t o UFC 1-300-02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Criteria Change Request (CCR) .

NOTE: When cr ack r epai r i s i nvol ved, edi t accor di ngl y, i ncl udi ng t he sect i on t i t l e. Thi s speci f i cat i on shoul d not be used f or l i qui d oxygen compat i bl e j oi nt seal s.

NOTE: The f ol l owi ng i nf or mat i on shal l be shown on t he pr oj ect dr awi ngs:

1. Spaci ng, wi dt h, and t ype of j oi nt s i n concr et e pavement s t o be seal ed.

2. Typi cal det ai l s of exi st i ng j oi nt s.

3. Dept h of exi st i ng seal ant t o be r emoved f or each

SECTION 32 01 19.61 Page 3 t ype of j oi nt , i f not speci f i ed.

4. Det ai l of t ype of j oi nt t o be r ef aced or wi dened wi t h a concr et e saw. Show ext ent of new wi dt h and dept h of sawi ng t o pr ovi de t he pr oper shape f act or of t he voi d space i n t he j oi nt . For mat er i al s, ot her t han si l i cone, t he r at i o of t he dept h t o wi dt h ( d/ w) of t he seal ant r eser voi r shoul d gener al l y be not l ess t han 1 nor gr eat er t han 1. 5. For s i l i cone seal ant a dept h t o wi dt h r at i o of appr oxi mat el y 0. 5 i s pr ef er r ed. Dependi ng upon t he wi dt h of t he r ef aced j oi nt , t he t hi ckness of t he seal ant bead shoul d be bet ween 6 and 13 mm 1/ 4 and 1/ 2 i n.

Fol l owi ng ar e t he r ecommended det ai l s f or s i l i cone sealants:

Ref aced Joi nt Wi dt h 10 mm 13 mm 19 mm 25 mm

Recess Bel ow Sur f ace 6 mm 6 mm 6 mm 13 mm

Thi ckness of Seal ant 6 mm 6 mm 10 mm 13 mm

Backer Rod Di amet er 13 mm 16 mm 22 mm 31 mm

Tot al Dept h of Joi nt 25 mm 28 mm 38 mm 56 mm

Ref aced Joi nt Wi dt h 3/8" 1/2" 3/4" 1"

Recess Bel ow Sur f ace 1/4" 1/4" 1/4" 1/2"

Thi ckness of Seal ant 1/4" 1/4" 3/8" 1/2"

Backer Rod Di amet er 1/2" 5/8" 7/8" 1 1/ 4"

Tot al Dept h of Joi nt 1" 1 1/ 8" 1 1/ 2" 2 1/ 4"

5. Locat i on and t ype of bond br eaker or back- up.

6. I dent i f y t ype of seal ant based on pr oposed use of pavement s. ( See not e i n par agr aph ent i t l ed " Joi nt Seal ant . " )

7. For j oi nt det ai l s see UFC 3- 260- 02, " Pavement Desi gn f or Ai r f i el ds" .

PART 1 GENERAL

NOTE: I n pr epar i ng Cont r act speci f i cat i ons f or concr et e pavement s, use UFC 3- 250- 04 St andar d Pr act i ce f or Concr et e Pavement s.

SECTION 32 01 19.61 Page 4

1.1 UNIT PRICES

NOTE: Del et e t hi s par agr aph when l ump sum bi ddi ng i s used.

1.1.1 Measurement

Determine the quantity of each sealing item to be paid for by actual measurement of the number of linear m ft of in-place material that has been approved.

1.1.2 Payment

Make payment at the Contract unit bid prices per linear meter foot for the sealing items scheduled. Include the cost of labor, materials, and the use of equipment and tools required to complete the work in the unit bid price.

1.2 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out si de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASTM INTERNATIONAL (ASTM)

ASTM C603 (2014; R 2019) Standard Test Method for Extrusion Rate and Application Life of Elastomeric Sealants

ASTM C639 (2015; R 2020)Standard Test Method for Rheological (Flow) Properties of Elastomeric Sealants

ASTM C661 (2015) Indentation Hardness of Elastomeric-Type Sealants by Means of a

SECTION 32 01 19.61 Page 5

Durometer

ASTM C679 (2003; E 2009; R 2009) Tack-Free Time of Elastomeric Sealants

ASTM C719 (2014; R 2019) Standard Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)

ASTM C792 (2015; R 2020) Effects of Heat Aging on Weight Loss, Cracking, and Chalking of Elastomeric Sealants

ASTM C793 (2005; R 2017) Standard Test Method for Effects of Laboratory Accelerated Weathering on Elastomeric Joint Sealants

ASTM C920 (2018) Standard Specification for Elastomeric Joint Sealants

ASTM C1016 (2014) Standard Test Method for Determination of Water Absorption of Sealant Backing (Joint Filler) Material

ASTM C1193 (2013) Standard Guide for Use of Joint Sealants

ASTM D412 (2016) Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension

ASTM D789 (2015) Determination of Relative Viscosity and Moisture Content of Polyamide (PA)

ASTM D903 (1998; R 2017) Standard Test Method for Peel or Stripping Strength of Adhesive Bonds

ASTM D5249 (2010; R 2016) Standard Specification for Backer Material for Use with Cold-and Hot-Applied Joint Sealants in Portland-Cement Concrete and Asphalt Joints

ASTM D5329 (2016) Standard Test Methods for Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphalt Pavements and Portland Cement Concrete Pavements

ASTM D5893/D5893M (2016) Standard Specification for Cold Applied, Single Component, Chemically Curing Silicone Joint Sealant for Portland Cement Concrete Pavements

ASTM D6690 (2015) Standard Specification for Joint and Crack Sealants, Hot Applied, for Concrete and Asphalt Pavements

SECTION 32 01 19.61 Page 6

U.S. ARMY CORPS OF ENGINEERS (USACE)

COE CRD-C 525 (1989) Corps of Engineers Test Method for Evaluation of Hot-Applied Joint Sealants for Bubbling Due to Heating

1.3 SUBMITTALS

NOTE: Revi ew Submi t t al Descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect .

The Gui de Speci f i cat i on t echni cal edi t or s have desi gnat ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y, wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a “ G” t o an i t em, i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

For submi t t al s r equi r i ng Gover nment appr oval on Ar my pr oj ect s, a code of up t o t hr ee char act er s wi t hi n t he submi t t al t ags may be used f ol l owi ng t he " G" desi gnat i on t o i ndi cat e t he appr ovi ng aut hor i t y.

Codes f or Ar my pr oj ect s usi ng t he Resi dent Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i ct Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i ct Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy, Ai r For ce, and NASA pr oj ect s.

Use t he " S" Cl assi f i cat i on onl y i n SD- 11 Cl oseout Submi t t al s. An " S" f ol l owi ng a submi t t al i t em i ndi cat es t hat t he submi t t al i s r equi r ed f or t he Sust ai nabi l i t y eNot ebook t o f ul f i l l f eder al l y mandat ed sust ai nabl e r equi r ement s i n accor dance wi t h Section 01 33 29 SUSTAI NABI LI TY REPORTI NG.

Choose t he f i r st br acket ed i t em f or Navy, Ai r For ce and NASA pr oj ect s, or choose t he second br acket ed i t em f or Ar my pr oj ect s.

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are [for Contractor Quality Control approval.][for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.] Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section

01 33 00 SUBMITTAL PROCEDURES:

SD-03 Product Data

SECTION 32 01 19.61 Page 7

Sealants

Submit catalog cuts, specifications, Safety Data Sheets and other information documenting conformance to Contract requirements.

Manufacturer's Recommendations

SD-04 Samples

NOTE: Li qui d j oi nt seal er pr oposed f or use i n ai r f i el d pavement s shoul d be t est ed by t he U. S. Ar my Cor ps of Engi neer , Wat er ways Exper i ment St at i on, P.

O. Box 631, Vi cksbur g, MS 39180, At t n: Lar r y Lynch, t el ephone: ( 601) 634- 4274, bef or e accept ance.

Pr oj ect Manager s shoul d assur e t hat suf f i c i ent f unds ( appr oxi mat el y $1500) ar e avai l abl e and t hat t he 45 day t est i ng t i me r equi r ement has been t aken i nt o account when est abl i shi ng cont r act compl et i on t i me.

For smal l pr oj ect s i nvol v i ng appr oxi mat el y l ess t han 3, 000 m 10, 000 l i near f t of j oi nt seal i ng, t he r equi r ement f or t est i ng may be wai ved pr ovi ded t hat a Fact or y Test Repor t i s submi t t ed. I n no case shoul d mat er i al s not meet i ng t he appl i cabl e speci f i cat i on be accept ed.

Sealants

Provide for testing a 19-L 5-gal sample of each sealant with associated primer to the Contracting Officer a minimum of 60 days prior to its use on the job. Provide factory-sealed containers with a factory applied label showing the following information:

Name of sealant

Identification of component, or primer

Specification number and type

Manufacturer's name

Manufacturer's lot and batch number

Date of Manufacture (month and year)

Shelf life retest date (month and year)

List of hazardous components

Quantity of material in container (volume)

Storage instructions

Instructions for use

Blocking Media/Backup Materials

Backer Rod

SECTION 32 01 19.61 Page 8

Bond Breaking Tapes

SD-06 Test Reports

NOTE: Li qui d j oi nt seal er pr oposed f or use i n ai r f i el d pavement s shoul d be t est ed by t he U. S. Ar my Cor ps of Engi neer , Wat er ways Exper i ment St at i on, P.

O. Box 631, Vi cksbur g, MS 39180, At t n: Lar r y Lynch, t el ephone: ( 601) 634- 4274, bef or e accept ance.

Pr oj ect Manager s shoul d assur e t hat suf f i c i ent f unds ( appr oxi mat el y $1500) ar e avai l abl e and t hat t he 45 day t est i ng t i me r equi r ement has been t aken i nt o account when est abl i shi ng cont r act compl et i on t i me.

For smal l pr oj ect s i nvol v i ng appr oxi mat el y l ess t han 3, 000 m 10, 000 l i near f t of j oi nt seal i ng, t he r equi r ement f or t est i ng may be wai ved pr ovi ded t hat a Fact or y Test Repor t i s submi t t ed. I n no case shoul d mat er i al s not meet i ng t he appl i cabl e speci f i cat i on be accept ed.

NOTE: Fact or y t est r epor t shoul d be r equi r ed f or j oi nt seal s on pr oj ect s when t he Gover nment t est i ng i s wai ved.

[ Sealants

] SD-07 Certificates

Equipment List

SD-08 Manufacturer's Instructions

Sealants

Provide instructions that include, but not limited to: storage requirements, ambient temperature and humidity ranges, and moisture condition of joints for successful installation;

requirements for preparation of joints; safe heating temperature;

mixing instructions; installation equipment and procedures;

application and disposal requirements; compatibility of sealant with filler material; curing requirements; and restrictions to be adhered to in order to reduce hazards to personnel or to the environment. Submit instructions at least 30 days prior to use.

1.4 QUALITY ASSURANCE

1.4.1 Test Requirements

NOTE: Sel ect t he appl i cabl e st at ement f or t est i ng and det er mi ni ng speci f i cat i on compl i ance and del et e t he i nappl i cabl e st at ement . Sel ect t he f i r st st at ement f or pr oj ect s except wher e t he pr oj ect i s l ess t han 200 L 50 gal or 200 kg 440 l bs of

SECTION 32 01 19.61 Page 9 mat er i al . When t he pr oj ect r equi r es l ess t han 200 L 50 gal or 200 kg 440 l bs of seal ant , t he f i r st st at ement can be del et ed and t he seal ant and back- up mat er i al may be accept ed on cer t i f i ed cer t i f i cat e t hat cont ai ns t he t est dat a showi ng compl i ance wi t h t he l abor at or y t est r equi r ement s. The cost of t est i ng can be obt ai ned f r om U. S. Ar my Cor ps of Engi neer Di v i s i on Labor at or i es or Wat er ways Exper i ment St at i on.

Test the sealant and backup or separating material for conformance with the referenced material specification.[ The materials will be tested by the Government. Do not use material at the project prior to receipt of written notice that the materials meet the laboratory requirements. The cost of the first test of samples will be borne by the Government. If the samples fail to meet specification requirements, replace the materials represented by the sample and test the new materials at the Contractor's expense.][ Perform testing of the materials in an approved independent laboratory and submit certified copies of the test reports for approval [_____] days prior to the use of the materials at the job site. Submit samples to be retained by the Government for possible future testing if the materials appear defective during or after application.] Conformance with the requirements of the laboratory tests specified does not constitute final acceptance of the materials. Base final acceptance on the performance of the in-place materials. Submit samples of the materials (sealant, primer if required, and backup material), in sufficient quantity for testing and approval [_____] days prior to the beginning of work. Do not use material until it has been approved.

1.4.2 Trial Joint Sealant Installation

Prior to cleaning and sealing the joints for the entire project, prepare a test section at least 60 m 200 ft long using the specified materials and approved equipment, so as to demonstrate the proposed joint preparation and sealing of the types of joints in the project. Following the completion of the test section and before any other joint is sealed, inspect the test section to determine that the materials and installation meet the requirements specified. Inspect joint seal test section.[ Provide written notice of deficiencies and required corrections or adjustments in the joint seal installation procedures.] Correct deficiencies and obtain approval of test section prior to installing joint seals. If it is determined that the materials or installation do not meet the requirements, remove the materials, and reclean and reseal the joints at no cost to the Government. Permit the test section meeting the requirements to be incorporated into the permanent work and paid for at the Contract unit price per linear foot for sealing items scheduled.

Prepare and seal other joints in the manner approved for sealing the test section. Notify the Contracting Officer upon completion of the test section.

1.5 DELIVERY, STORAGE, AND HANDLING

Inspect materials delivered to the site for visible damage, and unload and store with a minimum of handling. Deliver joint materials in original sealed containers and protect from freezing or overheating. Provide jobsite storage facilities capable of maintaining temperature ranges within manufacturers recommendations.

SECTION 32 01 19.61 Page 10

1.6 ENVIRONMENTAL REQUIREMENTS

Do not proceed with work when weather conditions detrimentally affect the quality of cleaning joints or applying sealants. Proceed with joint preparation and sealing only when weather conditions are in accordance with manufacturer's instructions. Install joint sealant to dry surfaces and protect sealant and bond breakers from moisture.

1.7 TRAFFIC CONTROL

Do not permit vehicular or heavy equipment traffic on the pavement in the area of the joints being sealed during the protection and curing period of the sealant. Permit traffic on the pavement at the end of the curing period.

PART 2 PRODUCTS

2.1 SEALANTS

NOTE: Sel ect j oi nt seal ant s based on t he pr oposed use and l ocal exper i ence. Speci f y ASTM D6690 ( Type I I or Type I I I ) seal ant s f or ar eas t hat do not r ecei ve f uel spi l l age, engi ne bl ast and heat exposur e ( i . e. , ar eas wher e ai r cr af t war m up t he engi nes) . Type I I I cont ai ns t he r equi r ement s of Type I I and has addi t i onal r equi r ement s f or a wat er i mmer sed bond t est and an oven- aged r esi l i ence t est . ASTM D6690 ( Type I I or Type I I I ) seal ant s ar e nor mal l y used on r oadways, vehi c l e par ki ng l ot s, and on some ai r cr af t t axi ways. Test ASTM D6690 seal ant s i n accor dance wi t h ASTM D5329 and COE CRD- C 525 i n addi t i on t o t he appr opr i at e speci f i cat i on.

Per mi t ASTM D5893/ D5893M seal ant s t o be speci f i ed i n pl ace of ASTM D6690 seal ant s. ASTM D5893/ D5893M cover s s i l i cone seal ant s t hat pr ovi de i mpr oved l i f e- cycl e cost benef i t s. Per mi t s i l i cone seal ant t o be used f or gener al pur pose seal i ng and r e- seal i ng of j oi nt s i n concr et e pavement s not subj ect t o sever e j et f uel or l ubr i cant spi l l age.

Si l i cone swel l s up under f uel spi l l s . Thi s may r esul t i n an unsat i sf act or y seal i n ai r cr af t or vehi c l e ser vi c i ng ar eas wher e spi l l age i s f r equent .

Use materials for sealing cracks in accordance with ASTM D6690 and ASTM D5893/D5893M based on the type of area as follows:

Area Sealing Material

[_____] [ ASTM D6690, Type II and ASTM D5329/

COE CRD-C 525 ]

[_____] [ ASTM D6690, Type III and ASTM D5329/

COE CRD-C 525 ]

SECTION 32 01 19.61 Page 11

Area Sealing Material

[_____] [ ASTM D5893/D5893M]

Use self leveling, non-acid curing silicone sealant meeting the following requirements in accordance with ASTM C920 or ASTM C1193:

TEST TEST METHOD REQUIREMENTS

Weight Loss ASTM C792 Modified (see Note 1 below)

10 percent max.

Flow ASTM C639 (Type I) Smooth and level

Extrusion Rate ASTM C603 30 sec. max.

Tack Free Time ASTM C679 5 hours max.

Hardness (Shore 00) (see Note 2 below)

ASTM C661 30 - 80

Tensile Stress at 150 Percent Elongation (see Note 2 below)

ASTM D412 (Die C) 200 kPa 30 psi max.

Percent Elongation (see Note 2 below)

ASTM D412 (Die C) 700 min.

Accelerated Weathering ASTM C793 Pass 5000 hours

Bond and Movement Capability ASTM C719 Pass 10 cycles at plus 50 percent movement (no adhesion or cohesion failure)

Peel ASTM D903 Minimum 140 kPa 20 psi of width with at least 75 percent cohesive failure

NOTES:

1. Percent weight loss of wet (uncured) sample after placing in forced-draft oven maintained at 70 degrees plus 2 degrees C 158 degrees plus 1 degree F for two hours.

2. Specimen cured 21 days at 23 degrees C plus 2 degrees C 73 degrees plus 1 degree F and 50 percent plus 5 percent humidity.

ACCELERATED WEATHERING FACTORY TEST REPORT. For the Accelerated Weathering test, in lieu of testing of actual sealant to be used on the project, it is permitted to submit a report of a factory test, performed within two years of Contract award.

2.2 PRIMERS

Use primers in accordance with the recommendation of the manufacturer.

SECTION 32 01 19.61 Page 12

2.3 BOND BREAKERS

2.3.1 Blocking Media/Backup Materials

NOTE: The use of a bond br eaki ng separ at i on t ape or backup mat er i al i n t he j oi nt may pr event an adver se r eact i on bet ween i ncompat i bl e mat er i al s, mai nt ai n t he desi r ed conf i gur at i on ( shape f act or of t he mat er i al ) , and act as a bond br eaker t o pr event excessi ve st r esses f r om bei ng pl aced on t he seal ant dur i ng pavement movement . Ther ef or e, t he separ at i ng or backup mat er i al shoul d be car ef ul l y sel ect ed and i nst al l ed t o f or m an ef f ect i ve and dur abl e suppor t f or t he seal ant . Separ at i ng or bl ocki ng medi a shoul d be pl aced t o a dept h bel ow t he pavement appr oxi mat el y equal t o t he wi dt h of t he j oi nt . Thi s i s t o achi eve a shape f act or ( r at i o of t he dept h of t he seal ant t o t he wi dt h of t he j oi nt ) of 1. ASTM D5893/ D5893M seal ant s somet i mes r equi r e a shape f act or of 0. 5 i nst ead of 1. Thi s i s equi val ent t o a wi dt h- t o- dept h r at i o of 2: 1 and r equi r es t he st andar d j oi nt det ai l t o be modi f i ed. I f an ASTM D5893/ D5893M seal ant i s t o be used t he pl acement dept h of t he bond br eaki ng separ at i ng t ape or backup mat er i al shoul d be adj ust ed accor di ngl y. Dr awi ngs shoul d be i ncl uded i n t he Cont r act dr awi ngs t o i ndi cat e appl i cat i on det ai l s.

Provide backup (joint filler) material that is a compressible, nonshrinking, nonstaining, nonabsorbing, nonreactive material with the sealant. Use backup material compliant with ASTM D5249. Use material with a melting point at least 3 degrees C 5 degrees F greater than the pouring temperature of the sealant being used when tested in accordance with ASTM D789. Use material with a water absorption of not more than 5 percent of the sample weight when tested in accordance with ASTM C1016.

Use backup (joint filler) material that is 25 plus or minus 5 percent larger in diameter than the nominal width of the crack. Use blocking media consistent with the sealant manufacturer's installation instructions.

2.3.2 Bond Breaking Tapes

Provide a bond breaking tape or separating material that is a flexible, nonshrinkable, nonabsorbing, nonstaining, and nonreacting adhesive-backed tape. Use material with a melting point at least 3 degrees C 5 degrees F greater than the pouring temperature of the sealant being used when tested in accordance with ASTM D789. Use bond breaker tape approximately 3 mm 1/8 in wider than the nominal width of the joint and that does not bond to the sealant. Use bond breaking tape shall be consistent with the sealant manufacturer's installation instructions.

PART 3 EXECUTION

3.1 EXECUTING EQUIPMENT

Submit equipment list and description of the equipment to be used and a statement from the supplier of the sealant that the proposed equipment is acceptable for installing the specified sealant. Use equipment for

SECTION 32 01 19.61 Page 13 heating, mixing, and installing seals in accordance with the instructions provided by the sealant manufacturer. Provide equipment, tools, and accessories necessary to clean existing joints and install liquid joint sealants. Maintain machines, tools, and other equipment in proper working condition. Submit a list of proposed equipment to be used in performance of construction work including descriptive data, [_____] days prior to use on the project.

3.1.1 Joint Cleaning Equipment

3.1.1.1 Tractor-Mounted Routing and Plowing Tool

Use routing tools for removing old sealant from the joints, of such shape and dimensions and so mounted on the tractor that do not damage the sides of the joints. Use tools designed to be adjusted to remove the old material to varying depths and widths as required. Use equipment capable of maintaining accurate cutting depth and width control. Use a joint plow equipped with a spring or hydraulic mechanism to release pressure on the tool prior to spalling the concrete. Do not permit the use of V-shaped tools or rotary impact routing devices. Permit the use of hand-operated spindle routing devices to clean and enlarge random cracks.

3.1.1.2 Concrete Saw

Provide a self-propelled power saw, with water-cooled diamond or abrasive saw blades, for cutting joints to the depths and widths specified, for refacing joints, cleaning sawed joints where sandblasting does not provide a clean joint, widening, or deepening existing joints as specified without damaging the sides, bottom, or top edge of joints. Permit single or gang type blades with one or more blades mounted in tandem for fast cutting.

Select saw adequately powered and sized to cut specified opening with not more than two passes of the saw through the joint.

3.1.1.3 Sandblasting Equipment

NOTE: Sandbl ast i ng equi pment wi t h a 6 mm 1/ 4 i n nozzl e r equi r es at l east 65 L per second 137 cubi c f t per mi nut e of ai r t o f unct i on ef f i c i ent l y.

Include with the sandblasting equipment an air compressor, hose, and long-wearing venturi-type nozzle of proper size, shape and opening. Do not permit the maximum nozzle opening to exceed 6 mm 1/4 in . Use a portable air compressor capable of providing not less than 71 L/s 150 cfm and maintaining a line pressure of not less than 620 kPa 90 psi at the nozzle while in use. Demonstrate compressor capability, under job conditions, before approval. Use a compressor equipped with traps that maintain the compressed air free of oil and water. Use a nozzle with an adjustable guide that holds the nozzle aligned with the joint approximately 25 mm 1 in above the pavement surface. Adjust the height, angle of inclination and the size of the nozzle to secure satisfactory results.

3.1.1.4 Waterblasting Equipment

NOTE: Wat er bl ast i ng equi pment var i es consi der abl y wi t h r espect t o desi gn of wand, nozzl e, wat er pr essur e, and wat er vol ume, dependi ng upon t he manuf act ur er . Consequent l y, t he ef f ect i veness of a

SECTION 32 01 19.61 Page 14 par t i cul ar set of equi pment cannot be pr edi ct ed.

Del et e t hi s par agr aph i f wat er bl ast i ng i s not used.

Include with the waterblasting equipment a trailer-mounted water tank, pumps, high-pressure hose, wand with safety release cutoff control, nozzle, and auxiliary water resupply equipment. Provide water tank and auxiliary resupply equipment of sufficient capacity to permit continuous operations. Use a nozzle with an adjustable guide that holds the nozzle aligned with the joint approximately 25 mm 1 in above the pavement surface. Adjust the height, angle of inclination and the size of the nozzle to obtain satisfactory results. Use a pressure gauge mounted at the pump that shows the pressure in kPa psi at which the equipment is operating.

3.1.1.5 Air Compressor

Use a portable air compressor capable of operating the sandblasting equipment and capable of blowing out sand, water, dust adhering to sidewalls of concrete, and other objectionable materials from the joints.

Use a compressor that provides air at a pressure not less than 620 kPa 90 psi and a minimum rate of 0.07 cubic m of air per second 150 cubic ft of air per minute at the nozzles and free of oil.

3.1.1.6 Vacuum Sweeper

Use a self-propelled, vacuum pickup sweeper capable of completely removing loose sand, water, joint material, and debris from pavement surface.

3.1.1.7 Hand Tools

NOTE: Wher e spal l ed j oi nt edges have not been r epai r ed pr i or t o any pr evi ous seal i ng, i t may be necessar y f or t he Cont r act or t o empl oy ot her t ypes of smal l t ool s f or t he r epai r wor k. Such t ool s shoul d be car ef ul l y eval uat ed f or pot ent i al spal l i ng ef f ect s pr i or t o appr oval f or use. For r epai r i ng concr et e pavement s adj acent t o j oi nt s, t he desi gner i s r ef er r ed t o Sect i on 32 01 29. 61 PARTI AL DEPTH PATCHI NG OF RI GI D PAVI NG, and t o Techni cal Manual 5-822-9.

Permit the use of hand tools, such as brooms and chisels, when approved, for removing defective sealant from a crack and repairing or cleaning the crack faces.

3.1.2 Sealing Equipment

NOTE: Del et e t he i nappr opr i at e par agr aphs.

Use joint sealing equipment of a type required by the sealant manufacturer's installation instructions. Use equipment capable of installing sealant to the depths, widths and tolerances indicated. Do not proceed with joint sealing when malfunctions are noted until the malfunctions are corrected.

SECTION 32 01 19.61 Page 15

3.1.2.1 Hot-Poured Sealing Equipment

Use mobile unit applicators equipped with a double-boiler, agitator-type kettle with an oil medium in the outer space for heat transfer for heating and installing ASTM D6690 joint sealant materials; a direct-connected pressure-type extruding device with a nozzle shaped for inserting in the joint to be filled; positive temperature devices for controlling the temperature of the transfer oil and sealant; and a recording thermometer for indicating the temperature of the sealant. Use an applicator unit designed so that the sealant circulates through the delivery hose and returns to the inner kettle when not in use.

3.1.2.2 Cold-Applied, Single-Component Sealing Equipment

NOTE: Some ASTM D5893/ D5893M seal ant s cur e when exposed t o moi st ur e. When t he seal ant i s moi st ur e sensi t i ve i t i s necessar y t o use Tef l on- l i ned hoses t o pr event t he seal ant f r om cur i ng i n t he hoses.

Use equipment for installing ASTM D5893/D5893M single component joint sealants that consists of an extrusion pump, air compressor, following plate, hoses, and nozzle for transferring the sealant from the storage container into the joint opening. Use a nozzle with dimensions that allows the tip of the nozzle to extend into the joint to allow sealing from the bottom of the joint to the top. Maintain the initially approved equipment in good working condition, serviced in accordance with the supplier's instructions, and unaltered in any way without obtaining prior approval. Use lined hoses and seals to prevent moisture penetration and withstand pumping pressures. Use equipment free of contamination from previously used or other type sealant. Permit use of small hand-held air-powered equipment (i.e., caulking guns) for small applications.

3.2 SAFETY

NOTE: Del et e t hi s par agr aph i f l i qui d oxygen ( LOX) equi pment , st or age, or pi pi ng i s not wi t hi n t he pr oj ect ar ea. Joi nt seal ant shoul d not be used within 8 m 25 f t of any LOX equi pment or st or age.

I f LOX equi pment , st or age, or pi pi ng i s wi t hi n t he pr oj ect ar ea, use cont i nuousl y r ei nf or ced concr et e s l abs i n t he 8 m 25 f t c l ear ar ea of LOX t o r educe t he number of j oi nt s. I f j oi nt s cannot be el i mi nat ed wi t hi n t he 8 m 25 f t c l ear ar ea, c l ean t he j oi nt s i n t he ar ea and l eave unseal ed. DO NOT

PERMI T LOX TO MI X WI TH ANY ORGANI C MATERI AL.

Speci f y sandbl ast i ng of j oi nt wal l s as a l i ght c l eani ng met hod f ol l owi ng sawi ng of j oi nt s.

Sandbl ast i ng somet i mes causes mi nor det er i or at i on ar ound t he j oi nt ar ea. Secur e st at i on per mi ssi on bef or e sandbl ast i ng. I f necessar y, i nser t a cr oss- r ef er ence t o Sect i on 01 57 19 TEMPORARY

ENVI RONMENTAL CONTROLS.

SECTION 32 01 19.61 Page 16

Do not place sealant within 8 m 25 ft of LOX equipment, LOX storage, or LOX piping. Clean joints in this area and leave them unsealed.

In accordance with the provisions of the Contract respecting "Accident Prevention," take appropriate measures to control worker exposure to toxic substances during the work. Provide personnel protective equipment as required. Make Material Safety Data Sheets (Department of Labor Form OSHA-20 or comparable form) available on the site.

[ Perform sandblasting operations in accordance to paragraph entitled "Abrasive Blasting" of Section 01 57 19 TEMPORARY ENVIRONMENTAL CONTROLS.

] 3.3 PREPARATION OF JOINTS

NOTE: The pr oper pr epar at i on of j oi nt s wi t h r espect t o s i ze of j oi nt openi ng, r equi r ed cl eanl i ness of concr et e sur f aces t o be bonded, and pr oper separ at i on of noncompat i bl e mat er i al s f r om t he j oi nt seal ant cannot be over emphasi zed. The same appl i es t o st or age, pr epar at i on, pr opor t i oni ng, mi xi ng and pl acement of seal ant s. The negl ect of any f acet of t hese oper at i ons can r esul t , and has r esul t ed, i n poor per f or mance of t he j oi nt seal ant .

Pr ovi de det ai l s of t he exi st i ng j oi nt s and t he r equi r ed dept h of r emoval of ol d seal ant on t he drawings.

Unless otherwise indicated, remove existing material, saw, clean and reseal joints. Do not proceed with final cleaning operations by more than one working day in advance of sealant. Clean joints by removing existing joint sealing compound, bond-breakers, dirt, laitance, curing compound, filler, and protrusions of hardened concrete from the sides and upper edges of the joint space to be sealed and other foreign material with the equipment. Do not permit cleaning procedures that damage joints or previously repaired patches by chipping or spalling. Remove existing sealant to the required depth. Precise shape and size of existing joints vary, and conditions of joint walls and edges vary and include but are not limited to rounding, square edges, sloping, chips, voids, depressions, and projections.

3.3.1 Existing Sealant Removal

NOTE: Del et e t hi s par agr aph i f t he j oi nt s have never been seal ed and r enumber t he subsequent par agr aphs. Speci f y and show on t he pl ans t he dept h t o r emove t he ol d seal ant f r om t he j oi nt s. Show t ypi cal exi st i ng j oi nt di mensi ons. Wat er bl ast er s have been used successf ul l y t o r emove seal ant s t hat st i l l have some r esi l i ence. A nozzl e t hat put s out a t hi n st r eam of wat er i s r equi r ed t o cut t he seal ant l oose f r om t he j oi nt wal l s. Do not use t he concr et e saw i f i t wi dens t he j oi nt t o a wi dt h gr eat er t han 25 mm 1 i n.

SECTION 32 01 19.61 Page 17

Cut loose the in-place sealant from both joint faces and to the required depth, using the [tractor-mounted routing equipment] [concrete saw] [waterblaster] as specified in paragraph EQUIPMENT. Provide a depth sufficient to accommodate blocking media and bond breakers that are required to maintain the depth of new sealant to be installed. For expansion joints, remove existing sealant to a depth of not less than [the indicated depth.][ 25 mm 1 in .] When existing preformed expansion-joint material is more than 25 mm 1 in below the surface of the pavement, remove existing sealant to the top of the preformed joint filler. Prior to further cleaning operations, remove loose old sealant remaining in the joint opening by blowing with compressed air. Permit use of hand tools to remove sealant from random cracks. Do not permit chipping, spalling, or other damage to the concrete. Clean pavement surface with vacuum sweeper. Protect previously cleaned joints from being contaminated by subsequent cleaning operations.

3.3.2 Sawing

NOTE: Joi nt s of t en need t o be r ef aced or wi dened t o pr ovi de ver t i cal f aces and r emove damaged concr et e.

Car e shoul d be used when r ef aci ng or wi deni ng j oi nt s so t hat t he j oi nt ' s wi dt h does not exceed 25 mm 1 i n.

I f t he j oi nt wi dt h exceeds 25 mm 1 i n, r ebui l di ng of t he j oi nt shoul d be consi der ed. Joi nt wal l s shoul d be ver t i cal . The edges shoul d not be r ounded or bevel ed unl ess r equi r ed by desi gn.

3.3.2.1 Refacing of Joints

NOTE: Speci f y r ef aci ng of j oi nt s by sawi ng f or t he f ol l owi ng r easons:

1. To wi den t he j oi nt space or change t he shape factor.

2. To st r ai ght en t he ver t i cal wal l s i nsi de t he j oi nt s and r emove ol d seal ant .

I f t he j oi nt s have never been seal ed, change t he t i t l e of t hi s par agr aph t o Faci ng of Joi nt s and t he appr opr i at e wor ds and sent ences used. I f " dr y" sawi ng i s used t o f ace or r ef ace t he j oi nt s, r emove t he debr i s usi ng compr essed ai r .

Accomplish [refacing] [facing] of joints using a concrete saw as specified in paragraph EQUIPMENT [to remove residual old sealant and a minimum of concrete from the joint face to provide exposure of newly cleaned concrete, and, if required, to enlarge the joint opening to the width and depth shown on the drawings.] [to saw through sawed and filler-type joints to loosen and remove material until the joint is clean and open to the full specified width and depth.] Provide exposure of newly clean concrete through removal. Remove burrs and irregularities from sides of joint faces. Stiffen the blade with a sufficient number of dummy (used) blades

SECTION 32 01 19.61 Page 18 or washers. Clean, immediately following the sawing operation, the joint opening using a water jet to remove saw cuttings and debris and adjacent concrete surface. Protect adjacent previously cleaned joint spaces from receiving water and debris during the cleaning operation.

a. Joint Widening (Except Expansion Joints): Saw joints having grooves less than 10 mm 3/8 in wide and less than 25 mm 1 in deep to a minimum width of [10] [13] [_____] mm [3/8] [1/2] [_____] in and to the minimum depth, [of] [25 mm] [38 mm] [1 in] [1-1/2 in] [as indicated].

3.3.2.2 Refacing of Random Cracks

NOTE: Use a ver t i cal spi ndl e r out i ng devi ce t o c l ean r andom cr acks. Sandbl ast c l ean r andom cr acks t hat ar e appr oxi mat el y 25 mm 1 i n wi de t o pr event addi t i onal wi deni ng of t he cr ack i nst ead of sawi ng or r out i ng.

Accomplish sawing of the cracks using a power-driven concrete saw as specified in paragraph EQUIPMENT. Use a saw blade 150 mm 6 in or less in diameter to enable the saw to follow the trace of the crack. Stiffen the blade with dummy (or used) blades or washers. Immediately following the sawing operation, clean the crack opening using a water jet to remove saw cuttings and debris.

3.3.3 Final Cleaning of Joints

3.3.3.1 Sandblasting

NOTE: Speci f y sandbl ast i ng of j oi nt wal l s f ol l owi ng sawi ng of j oi nt s. Sandbl ast i ng may cause some mi nor det er i or at i on ar ound t he j oi nt ar ea. Secur e st at i on per mi ssi on bef or e sandbl ast i ng. I f necessar y, i nser t a cr oss- r ef er ence t o Sect i on 01 57 19

TEMPORARY ENVI RONMENTAL CONTROLS.

Do not per mi t sandbl ast i ng of j oi nt s under cer t ai n condi t i ons. Bl owi ng sand and dust may ei t her v i ol at e at mospher i c pol l ut i on st at ut es or may dr i f t i nt o ar eas wher e i t i s obj ect i onabl e. When sandbl ast i ng i s pr ohi bi t ed, subst i t ut e c l eani ng t he j oi nt s wi t h a wat er bl ast er or wi r e br ushes. Wi r e br ushes do not c l ean as wel l as t he sandbl ast er or wat er bl ast er ; use onl y f or smal l ar eas. When wi r e br ushes ar e used, pr ovi de at t ent i on t o ensur e wor n br ushes ar e not used and t hat t he j oi nt s ar e bei ng adequat el y c l eaned. When wat er bl ast i ng i s r equi r ed i nst ead of sandbl ast i ng, r epl ace t he wor d sandbl ast i ng wi t h wat er bl ast i ng.

Following removal of existing sealant, and sawing, and immediately before resealing, clean newly exposed concrete joint faces and pavement surface extending to a mimimum of 13 mm 1/2 in up to 50 mm 2 in from each joint edge by sandblasting until concrete surfaces in the joint space are free of sealants, dust, dirt, water and other foreign materials that prevent

SECTION 32 01 19.61 Page 19 bonding of new sealants to the concrete. Use sand particles of the proper size and quality for the work. Perform sandblasting with specified nozzles, air compressor, and other appurtenant equipment. Position nozzles to clean the joint faces. Make at least two passes; one for each joint face. Make as many passes as required for proper cleaning.

Immediately prior to sealing the joint, blow out the joint spaces with compressed air until completely free of sand, water, and dust. Install joint sealants to dry joints. Replace expansion joint filler material damaged in performing the work with new materials of the same type and dimensions as the existing material, or with appropriate blocking media.

3.3.4 Bond Breaker

At the time the joints receive the final cleaning and are dry, install bond breaker material as indicated with a steel wheel or other approved device.

3.3.4.1 Blocking Media ( Backer Rod ) (Except for Expansion Joints)

When the joint opening is of a greater depth than indicated for the sealant depth, plug or seal off the lower portion of the joint opening using a blocking media/back-up material to prevent the entrance of the sealant below the specified depth. Take care to ensure that the blocking media/backup material is placed at the specified depth and is not stretched or twisted during installation.

3.3.4.2 Bond Breaking Tape

Where inserts or filler materials contain bitumen, or the depth of the joint opening does not allow for the use of a backup material, insert a bond breaker separating tape to prevent incompatibility with the filler materials and three-sided adhesion of the sealant. Bond the tape to the bottom of the joint opening to prevent it from floating up into the new sealant.

3.3.5 Rate of Progress of Joint Preparation

Limit the stages of joint preparation, including sandblasting, air pressure cleaning and placing of the back-up material to only that lineal footage that can be sealed during the same day.

3.3.6 Disposal of Debris

NOTE: Speci f y l ocat i on of di sposal of debr i s.

Sweep pavement surface to remove excess joint material, dirt, water, sand, and other debris by vacuum sweepers or hand brooms. Remove the debris immediately [to a point off station.] [to a designated area.] [in accordance with Section 02 41 00 [DEMOLITION] [ AND ] [DECONSTRUCTION]].

3.4 PREPARATION OF SEALANT

NOTE: Del et e t he i nappr opr i at e par agr aphs.

SECTION 32 01 19.61 Page 20

3.4.1 Hot-Poured Sealants

Heat hot-poured sealing materials in accordance with ASTM D6690 and with safe heating temperature ranges recommended by the manufacturer. Withdraw and waste sealant that has been overheated or subjected to heating for over 3 hours or that remain in the applicator at the end of the day's operation. Heat sealant in specified equipment.

3.4.2 Single-Component, Cold-Applied Sealants

Inspect the ASTM D5893/D5893M sealant and containers prior to use. Reject materials that contain water, hard caking of any separated constituents, nonreversible jell, or materials that are otherwise unsatisfactory. Do not reject sealants that exhibit settlement of constituents in a soft mass that can be readily and uniformly remixed in the field with simple tools.

3.5 INSTALLATION OF SEALANT

3.5.1 Time of Application

After approval of the test section, seal joints immediately following final cleaning and placing of bond breakers. Commence sealing joints when walls are dust free and dry, and when weather conditions meet sealant manufacturer's instructions. If the above conditions cannot be met, or when rain interrupts sealing operations, reclean and permit the joints to dry prior to installing the sealant.

3.5.2 Sealing Joints

NOTE: Joi nt s shoul d be sl i ght l y under f i l l ed t o pr ecl ude ext r usi on of t he mat er i al above t he sur f ace of t he pavement at summer t i me t emper at ur es. For ai r f i el d pavement s, t he seal ant shoul d be r ecessed 3 mm 1/ 8 i n bel ow t he pavement sur f ace; f or r oads, st r eet s and par ki ng l ot s, t he seal ant shoul d be recessed 6 mm 1/ 4 i n. For pavement s t hat r ecei ve t r acked vehi c l e t r af f i c , t he seal ant shoul d be r ecessed a mi ni mum of 6 mm 1/ 4 i n bel ow t he pavement sur f ace af t er i t has cur ed or cool ed t o ambi ent temperature.

Do not install joint sealant until joints to be sealed have been inspected and approved. Install bond breaker just prior to pouring sealant. Fill the joints with sealant from bottom up until joints are uniformly filled solid from bottom to top using the specified equipment for the type of sealant required. Fill joints to [3][6] mm [1/8][1/4] in plus or minus

1.5 mm 1/16 in below top of pavement, and without formation of voids or entrapped air. Do not permit gravity methods or pouring pots to be used to install the sealant material. Except as otherwise permitted, tool the sealant immediately after application to provide firm contact with the joint walls and to form the indicated sealant profile below the pavement surface. Remove excess sealant that has been inadvertently spilled on the pavement surface. Do not permit traffic over newly sealed pavement until authorized. When a primer is recommended by the manufacturer, apply it evenly to the joint faces in accordance with the manufacturer's recommendations . Check sealed joints frequently to ensure that newly installed sealant is cured to a tack-free condition within the specified

SECTION 32 01 19.61 Page 21 time. Protect new sealant from rain during curing period.

3.6 INSPECTION/FIELD QUALITY CONTROL

3.6.1 Joint Cleaning

Inspect joints during the cleaning process to correct improper equipment and cleaning techniques that damage the concrete pavement in any manner.

Approve cleaned joints prior to installation of the separating or back-up material and joint sealant.

3.6.2 Sampling Sealant

Obtain a 4-L one gal sample of each type of sealant on the project from material used for each 3000 m 10,000 linear ft or less of joints sealed.

Store samples according to sealant manufacturer's instructions. Retain samples until final acceptance of the work.

3.6.3 Sealant Application Equipment

Inspect the application equipment to ensure conformance to temperature requirements, proper proportioning and mixing (if two-component sealant) and proper installation. Suspend operations if there is evidences of bubbling, improper installation, or failure to cure or set until causes of the deficiencies are determined and corrected.

3.6.4 Joint Sealant

Inspect the joint sealant for proper rate of cure and set, bonding to the joint walls, cohesive separation within the sealant, reversion to liquid, entrapped air and voids. Remove sealants exhibiting these deficiencies prior to the final acceptance of the project from the joint, wasted, and replace at no additional cost to the Government. Obtain approval for each joint seal installation.

3.7 ACCEPTANCE

Reject sealer that fails to cure properly, or fails to bond to joint walls, or reverts to the uncured state, or fails in cohesion, or shows excessive air voids, blisters, surface defects, swelling, or other deficiencies, or is not properly recessed within indicated tolerances.

Remove rejected sealer and reclean and reseal joints. Perform removal and reseal work promptly by and at the expense of the Contractor.

3.8 CLEAN-UP

Upon completion of the project, remove unused materials from the site and leave the pavement in a clean condition.

-- End of Section --

SECTION 32 01 19.61 Page 22