030130_FL-MAINTENANCE_OF_CAST-IN-PLACE_CONCRETE.pdf

CHICOPEE ARMORY REHABILITATION MMD PROJECT NO. 985101

CHICOPEE, MASSACHUSETTS ISSUED FOR BID – 05/20/11

10090 MAINTENANCE OF CAST-IN-PLACE CONCRETE 030130 - 1

SECTION 030130

MAINTENANCE OF CAST-IN-PLACE CONCRETE

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section Includes:

1. Removal of deteriorated concrete and subsequent replacement and patching.

2. Floor joint repair.

3. Epoxy crack injection.

4. Corrosion-inhibiting treatment.

5. Polymer overlays.

6. Polymer sealers.

7. Composite structural reinforcement.

B. Related Requirements:

1. Section 051200 "Structural Steel Framing" for concrete repair with structural steel framing.

2. Section 055000 "Metal Fabrications" for concrete repair with steel framing and fabricated devices.

1.3 UNIT PRICES

A. General: Unit prices include the cost of preparing existing construction to receive the work indicated[ and costs of field quality control required for units of work completed].

B. Concrete Removal and Replacement or Patching: Work will be paid for by the cubic foot

(cubic meter) computed on the basis of rectangular solid shapes approximating the actual shape of concrete removed and replaced with average depths, widths, and lengths, measured to the nearest inch (centimeter).

C. Epoxy Crack Injection: Work will be paid for by the linear foot (linear meter) of crack injected.

D. Polymer Overlays: Work will be paid for by the square foot (square meter) of exposed overlay surface.

E. Composite Structural Reinforcement: Work will be paid for by the square foot (square meter) of surface to which composite material is applied.

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1.4 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at [Project site] <Insert location>.

1.5 ACTION SUBMITTALS

A. Product Data: For each type of product. Include construction details, material descriptions, chemical composition, physical properties, test data, and mixing, preparation, and application instructions.

B. Samples: Cured samples for each exposed product and for each color and texture specified, [in manufacturer's standard size appropriate for each type of work] <Insert requirements or dimensions>.

C. Samples for Initial Selection: Cured samples for each exposed product and for each color and texture specified.

1. Include sets of patching-material Samples in the form of briquettes, at least [3 inches (75

mm) long by 1-1/2 inches (38 mm) wide] <Insert dimensions> representative of the range of concrete colors on the building. Document each Sample with product, mix, and or other information necessary to replicate it.

2. Include sets of polymer-overlay Samples in the form of treated cementitious tiles at least

[4 inches (100 mm) long by 4 inches (100 mm) wide] <Insert dimensions> representative of the range of required colors and textures.

3. Include sets of polymer-sealer Samples in the form of treated cementitious tiles at least [4 inches (100 mm) long by 4 inches (100 mm) wide] <Insert dimensions> representative of the range of required colors and textures.

4. Have each set of Samples contain a close color range of at least [three] [six] <Insert number> Samples of different mixes of materials that match the variations in existing, adjacent concrete when cured and dry.

D. Samples for Verification: Cured samples for each exposed product and for each color and texture specified.

1. Include Samples of each required type, color, and texture of patching material in the form of patches in drilled holes or sawed joints in sample concrete representative of the range of concrete colors on the building.

2. Include Samples of each required type, color, and texture of polymer-overlay material in the form of cementitious tiles at least [8 inches (200 mm) long by 8 inches (200 mm) wide] <Insert dimensions>.

3. Include Samples of each required type, color, and texture of polymer-sealer material in the form of cementitious tiles at least [8 inches (200 mm) long by 8 inches (200 mm) wide] <Insert dimensions>.

1.6 INFORMATIONAL SUBMITTALS

A. Qualification Data: For [installers] [and] [manufacturers].

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B. Material Certificates: For each type of [portland cement] [aggregate] <Insert material> supplied for mixing or adding to products at Project site.

C. Product Test Reports: For each [manufactured bonding agent] [cementitious patching mortar] [joint-filler] [crack injection adhesive] [polymer overlay] [polymer sealer] [and]

[composite structural reinforcement] <Insert product>, for tests performed by manufacturer and witnessed by a qualified testing agency.

D. Field quality-control reports.

E. Maintenance Program: Submit before work begins.

1.7 QUALITY ASSURANCE

A. Manufacturer Qualifications: Each [manufactured bonding-agent] [cementitious patching-mortar] [joint-filler] [crack-injection-adhesive] [polymer-overlay] [polymer-sealer] [and]

[composite-structural-reinforcement] <Insert product> manufacturer shall employ factory-trained technical representatives who are available for consultation and Project-site inspection and assistance at no additional cost.

B. Installer Qualifications: An entity that employs installers and supervisors who are trained and approved by manufacturer to apply [packaged patching-mortar materials] [epoxy crack injection materials] [corrosion-inhibiting treatments] [polymer overlays] [polymer sealers]

[and] [composite structural reinforcement].

C. Maintenance Program: Prepare a written plan for maintenance of cast-in-place concrete, including each phase or process, protection of surrounding materials during operations, and control of debris and runoff during the Work. Describe in detail materials, methods, equipment, and sequence of operations to be used for each phase of the Work.

D. Mockups: Build mockups to demonstrate aesthetic effects and set quality standards for materials and execution.

1. Deck Removal and Patching: Remove and repair an [approximately 50 sq. ft. (4.6

sq. m)] <Insert dimension> area of [deteriorated concrete deck] <Insert description>.

2. Floor Joint Repair: Cut out and reinstall joints in two separate areas [, each approximately 48 inches (1200 mm) long] [as indicated on Drawings] <Insert dimension>.

3. Epoxy Crack Injection: Perform epoxy crack injection in two separate areas [, each approximately 48 inches (1200 mm) long] [as indicated on Drawings] <Insert dimension>.

4. Polymer Overlay: Apply an [approximately 50 sq. ft. (4.6 sq. m)] <Insert dimension> area of polymer overlay.

5. Polymer Sealer: Apply an [approximately 50 sq. ft. (4.6 sq. m)] <Insert dimension> area of polymer sealer.

6. Composite Structural Reinforcement: Apply composite structural reinforcement [a minimum of 48 inches (1200 mm) long] [as indicated on Drawings] <Insert dimension>.

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7. Approval of mockups does not constitute approval of deviations from the Contract

Documents contained in mockups unless Architect specifically approves such deviations in writing.

8. Subject to compliance with requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

1.8 DELIVERY, STORAGE, AND HANDLING

A. Comply with manufacturer's written instructions for minimum and maximum temperature requirements and other conditions for storage.

B. Store cementitious materials off the ground, under cover, and in a dry location.

C. Store aggregates covered and in a dry location; maintain grading and other required characteristics and prevent contamination.

1.9 FIELD CONDITIONS

A. Environmental Limitations for Epoxies: Do not apply when air and substrate temperatures are outside limits permitted by manufacturer. During hot weather, cool epoxy components before mixing, store mixed products in shade, and cool unused mixed products to retard setting. Do not apply to wet substrates unless approved by manufacturer.

1. Use only Class A epoxies when substrate temperatures are below or are expected to go below 40 deg F (5 deg C) within 8 hours.

2. Use only Class A or B epoxies when substrate temperatures are below or are expected to go below 60 deg F (16 deg C) within 8 hours.

3. Use only Class C epoxies when substrate temperatures are above and are expected to stay above 60 deg F (16 deg C) for 8 hours.

B. Cold-Weather Requirements for Cementitious Materials: Do not apply unless concrete-surface and air temperatures are above 40 deg F (5 deg C) and will remain so for at least 48 hours after completion of Work.

C. Cold-Weather Requirements for Cementitious Materials: Comply with the following procedures:

1. When air temperature is below 40 deg F (5 deg C), heat patching-material ingredients and existing concrete to produce temperatures between 40 and 90 deg F (5 and 32 deg C).

2. When mean daily air temperature is between 25 and 40 deg F (minus 4 and plus 5 deg C), cover completed Work with weather-resistant insulating blankets for 48 hours after repair or provide enclosure and heat to maintain temperatures above 32 deg F (0 deg C) within the enclosure for 48 hours after repair.

3. When mean daily air temperature is below 25 deg F (minus 4 deg C), provide enclosure and heat to maintain temperatures above 32 deg F (0 deg C) within the enclosure for 48 hours after repair.

D. Hot-Weather Requirements for Cementitious Materials: Protect repair work when temperature and humidity conditions produce excessive evaporation of water from patching materials.

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Provide artificial shade and wind breaks, and use cooled materials as required. Do not apply to substrates with temperatures of 90 deg F (32 deg C) and above.

E. Environmental Limitations for High-Molecular-Weight Methacrylate Sealers: Do not apply when concrete surface temperature is below 55 deg F (13 deg C) or above [75 deg F (24 deg C)] [90 deg F (32 deg C)] <Insert temperature>. Apply only to [dry substrates]

[substrates that have been dry for at least 72 hours].

PART 2 - PRODUCTS

2.1 MATERIALS, GENERAL

A. Source Limitations: Obtain each color, grade, finish, type, and variety of product from single source with resources to provide products of consistent quality in appearance and physical properties.

B. VOC Content: Provide materials that comply with VOC limits of authorities having jurisdiction.

2.2 BONDING AGENTS

A. Epoxy-Modified, Cementitious Bonding and Anticorrosion Agent: Manufactured product that consists of water-insensitive epoxy adhesive, portland cement, and water-based solution of corrosion-inhibiting chemicals that forms a protective film on steel reinforcement.

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

a. BASF Construction Chemicals - Building Systems; Emaco P24.

b. Euclid Chemical Company (The), an RPM company; Duralprep A.C.

c. Kaufman Products, Inc.; Surepoxy HM EPL.

d. Sika Corporation, Construction Product Division; Armatec 110 EpoCem.

e. Sto Corp., Concrete Restoration Division; Sto Bonding and Anti-Corrosion Agent.

f. <Insert manufacturer's name; product name or designation>.

B. Epoxy Bonding Agent: ASTM C 881/C 881M, [Type II] [Type V] and free of VOCs.

1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. BASF Construction Chemicals - Building Systems.

b. ChemCo Systems.

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c. Dayton Superior Corporation.

d. Euclid Chemical Company (The); an RPM company.

e. Kaufman Products, Inc.

f. Sika Corporation; Construction Product Division.

g. Sto Corp., Concrete Restoration Division.

h. Unitex.

i. US SPEC; Division of US MIX Products Company.

j. W. R. Meadows, Inc.

k. <Insert manufacturer's name>.

C. Latex Bonding Agent: ASTM C 1059/C 1059M, [Type I] [Type II] [Type II at structural and exterior locations and where indicated, Type I at other locations].

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

a. Latex Bonding Agent, Type I (Redispersible):

1) Dayton Superior Corporation; [Superior Concrete Bonder (J-41)]

[Conspec Weldtite] [Edoco PVA Bonding Agent].

2) Euclid Chemical Company (The), an RPM company; [Euco Weld]

[Tammsweld].

3) Kaufman Products, Inc.; Sureweld.

4) US SPEC, Division of US MIX Products Company; [Bondcoat PVA]

[Multicoat EVA].

5) W. R. Meadows, Inc.; Intralok.

6) <Insert manufacturer's name; product name or designation>.

7) Latex Bonding Agent, Type II (Non-Redispersible):

8) Dayton Superior Corporation; [Conspec Strong Bond] [Day-Chem Ad

Bond (J-40)] [Edoco Acrylic Bondcrete].

9) Euclid Chemical Company (The), an RPM company; [Akkro-7T] [Flex-

Con] [SBR Latex].

10) Kaufman Products, Inc.; Surebond.

11) US SPEC, Division of US MIX Products Company; US Spec Acrylcoat.

12) W. R. Meadows, Inc.; Sealtight Acry-Lok.

13) <Insert manufacturer's name; product name or designation>.

D. Mortar Scrub Coat: Mix consisting of 1 part portland cement and 1 part fine aggregate complying with ASTM C 144 except 100 percent passing a No. 16 (1.18-mm) sieve.

2.3 PATCHING MORTAR

A. Patching Mortar, General:

1. Only use patching mortars that are recommended by manufacturer for each applicable horizontal, vertical, or overhead use orientation.

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2. Color and Aggregate Texture: Provide patching mortar and aggregates of colors and sizes necessary to produce patching mortar[ where indicated] that matches existing, adjacent, exposed concrete. Blend several aggregates if necessary to achieve suitable matches.

3. Coarse Aggregate for Patching Mortar: ASTM C 33, washed aggregate, Size No. 8, Class 5S. Add to patching-mortar mix only as permitted by patching-mortar manufacturer.

B. Job-Mixed Patching Mortar: 1 part portland cement and 2-1/2 parts fine aggregate complying with ASTM C 144, except 100 percent passing a No. 16 (1.18-mm) sieve.

C. Cementitious Patching Mortar: Packaged, dry mix for repair of concrete.

1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. BASF Construction Chemicals - Building Systems.

b. CGM, Incorporated.

c. Dayton Superior Corporation.

d. Euclid Chemical Company (The); an RPM company.

e. Fox Industries, Inc.

f. Kaufman Products, Inc.

g. Sika Corporation; Construction Product Division.

h. Sto Corp.; Concrete Restoration Division.

i. Unitex.

j. US SPEC; Division of US MIX Products Company.

k. W. R. Meadows, Inc.

l. <Insert manufacturer's name>.

3. Compressive Strength: Not less than [4000 psi (27.6 MPa)] [5000 psi (34.5 MPa)]

<Insert strength> at [28 days] <Insert time period> when tested according to

ASTM C 109/C 109M.

D. Rapid-Strengthening, Cementitious Patching Mortar: Packaged, dry mix[, ASTM C 928] for repair of concrete.

1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. BASF Construction Chemicals - Building Systems.

b. CGM, Incorporated.

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c. Dayton Superior Corporation.

d. Euclid Chemical Company (The); an RPM company.

e. Fox Industries, Inc.

f. Kaufman Products, Inc.

g. Sika Corporation; Construction Product Division.

h. Sto Corp.; Concrete Restoration Division.

i. Unitex.

j. US SPEC; Division of US MIX Products Company.

k. W. R. Meadows, Inc.

l. <Insert manufacturer's name>.

3. Compressive Strength: Not less than [1000 psi (7.0 MPa)] [2000 psi (13.8 MPa)] [3000 psi (21.0 MPa)] [4000 psi (27.6 MPa)] <Insert strength> within [three] <Insert number> hours when tested according to ASTM C 109/C 109M.

E. Polymer-Modified, Cementitious Patching Mortar: Packaged, dry mix for repair of concrete and that contains a[ non-redispersible] latex additive as either a dry powder or a separate liquid that is added during mixing.

1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. AQUAFIN, Inc.

b. BASF Construction Chemicals - Building Systems.

c. CGM, Incorporated.

d. Cortec Corporation.

e. Dayton Superior Corporation.

f. Euclid Chemical Company (The); an RPM company.

g. Fox Industries, Inc.

h. Kaufman Products, Inc.

i. Sika Corporation; Construction Product Division.

j. Sto Corp.; Concrete Restoration Division.

k. US SPEC; Division of US MIX Products Company.

l. W. R. Meadows, Inc.

m. <Insert manufacturer's name>.

3. Compressive Strength: Not less than [4000 psi (27.6 MPa)] [5000 psi (34.5 MPa)]

<Insert strength> at [28 days] <Insert time period> when tested according to

ASTM C 109/C 109M.

F. Polymer-Modified, Silica-Fume-Enhanced, Cementitious Patching Mortar: Packaged, dry mix for repair of concrete and that contains silica fume complying with ASTM C 1240 and a[ non-redispersible] latex additive as either a dry powder or a separate liquid that is added during mixing.

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1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. BASF Construction Chemicals - Building Systems.

b. Euclid Chemical Company (The); an RPM company.

c. Fox Industries, Inc.

d. Kaufman Products, Inc.

e. Sika Corporation; Construction Product Division.

f. Sto Corp.; Concrete Restoration Division.

g. W. R. Meadows, Inc.

h. <Insert manufacturer's name>.

3. Compressive Strength: Not less than [4000 psi (27.6 MPa)] [5000 psi (34.5 MPa)]

<Insert strength> at [28 days] <Insert time period> when tested according to

ASTM C 109/C 109M.

2.4 PREPLACED CONCRETE MATERIALS

A. Preplaced Aggregate: Washed aggregate, ASTM C 33, Class 5S, with [95 to 100 percent passing a 1-1/2-inch (37.5-mm) sieve, 40 to 80 percent passing a 1-inch (25-mm) sieve, 20 to

45 percent passing a 3/4-inch (19-mm) sieve, 0 to 10 percent passing a 1/2-inch (12.5-mm) sieve, and 0 to 2 percent passing a 3/8-inch (9.5-mm) sieve] [100 percent passing a 1-1/2-inch (37.5-mm) sieve, 95 to 100 percent passing a 1-inch (25-mm) sieve, 40 to 80 percent passing a 3/4-inch (19-mm) sieve, 0 to 15 percent passing a 1/2-inch (12.5-mm) sieve, and 0 to 2 percent passing a 3/8-inch (9.5-mm) sieve] <Insert requirement>.

B. Fine Aggregate for Grout: Fine aggregate according to ASTM C 33, but with 100 percent passing a No. 8 (2.36-mm) sieve, 95 to 100 percent passing a No. 16 (1.18-mm) sieve, 55 to 80 percent passing a No. 30 (0.6-mm) sieve, 30 to 55 percent passing a No. 50 (0.3-mm) sieve, 10 to 30 percent passing a No. 100 (0.15-mm) sieve, 0 to 10 percent passing a No. 200 (0.075-mm) sieve, and having a fineness modulus of 1.30 to 2.10.

C. Grout Fluidifier for Grout: ASTM C 937.

D. Pozzolans for Grout: ASTM C 618.

2.5 JOINT FILLER

A. Epoxy Joint Filler: Two-component, semirigid, 100 percent solids, epoxy resin with a Type A

Shore durometer hardness of at least 80 according to ASTM D 2240.

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

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a. BASF Construction Chemicals - Building Systems; Masterfill 300i.

b. ChemCo Systems; CCS Grout, [Control Joint] [or] [Control Joint - HB].

c. Dayton Superior Corporation; PoxyFil (J-52).

d. Euclid Chemical Company (The), an RPM company; Euco [700] [or] [800].

e. Kaufman Products, Inc.; Surepoxy Flexijoint.

f. Metzger/McGuire; [MM-80] [or] [Edge-Pro XL].

g. Sika Corporation, Construction Product Division; [Sikadur 51 NS] [or]

[Sikadur 51 SL].

h. Unitex; [Pro-Flex] [or] [Pro-Flex Gel].

i. US SPEC, Division of US MIX Products Company; SR 50 - EJF.

j. W. R. Meadows, Inc.; Sealtight Rezi-Weld Flex.

k. <Insert manufacturer's name; product name or designation>.

B. Polyurea Joint Filler: Two-component, semirigid, 100 percent solids, polyurea resin with a

Type A Shore durometer hardness of at least 80 according to ASTM D 2240.

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

a. ASTC Polymers; Penetron 3003.

b. BASF Construction Chemicals - Building Systems; [Masterfill 400 CT] [or] [TF-

100].

c. ChemCo Systems; CCS Grout, [Control Joint] [or] [Polyurea SWL].

d. Dayton Superior Corporation; Joint Fill.

e. Euclid Chemical Company (The), an RPM company; Euco Qwikjoint 200.

f. Metzger/McGuire; [Spal-Pro RS 88] [or] [Spal-Pro 2000].

g. <Insert manufacturer's name; product name or designation>.

C. Color: [As indicated by manufacturer's designations] [Matching existing joint filler] [As selected by Architect from full range of industry colors] <Insert requirement>.

2.6 EPOXY CRACK-INJECTION MATERIALS

A. Epoxy Crack-Injection Adhesive: ASTM C 881/C 881M, [Type I,] [Type IV,] [Type IV at structural locations and where indicated, Type I at other locations;] free of VOCs.

1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. BASF Construction Chemicals - Building Systems.

b. ChemCo Systems.

c. Dayton Superior Corporation.

d. Euclid Chemical Company (The); an RPM company.

e. Kaufman Products, Inc.

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f. Sika Corporation; Construction Product Division.

g. Sto Corp.; Concrete Restoration Division.

h. Unitex.

i. US SPEC; Division of US MIX Products Company.

j. W. R. Meadows, Inc.

k. <Insert manufacturer's name>.

3. Capping Adhesive: Product manufactured for use with crack injection adhesive by same manufacturer.

4. Color: Provide epoxy crack-injection adhesive and capping adhesive [as indicated by manufacturer's designations] [that will blend with existing, adjacent concrete and will not stain concrete surface] [As selected by Architect from full range of industry colors] <Insert requirement>.

2.7 OTHER MATERIALS

A. Corrosion-Inhibiting Treatment: Waterborne solution of alkaline corrosion-inhibiting chemicals for concrete-surface application that penetrates concrete by diffusion and forms a protective film on steel reinforcement.

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

a. Cortec Corporation; MCI 2020 Series.

b. Euclid Chemical Company (The), an RPM company; Duralprep 3020.

c. Evonik Degussa Corporation; Protectosil CIT.

d. Fox industries, Inc.; FX-361 Migratory Corrosion Inhibitor.

e. Sika Corporation, Construction Product Division; Sika FerroGard 903.

f. Sto Corp., Concrete Restoration Division; Sto Migratory Corrosion Inhibitor

CR247.

g. <Insert manufacturer's name; product name or designation>.

B. Polymer Overlay: Epoxy adhesive complying with ASTM C 881/C 881M, Type III, with surface-applied aggregate for skid resistance; free of VOCs.

1. Manufacturers: Subject to compliance with requirements, [provide products by the following] [provide products by one of the following] [available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following]:

2. Basis-of-Design Product: Subject to compliance with requirements, provide [product indicated on Drawings] <Insert manufacturer's name; product name or designation> or comparable product by one of the following:

a. ChemCo Systems.

b. Dayton Superior Corporation.

c. Euclid Chemical Company (The); an RPM company.

d. Kaufman Products, Inc.

e. Sika Corporation; Construction Product Division.

f. Sto Corp.; Concrete Restoration Division.

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g. Unitex.

h. US SPEC; Division of US MIX Products Company.

i. W. R. Meadows, Inc.

j. <Insert manufacturer's name>.

3. Aggregate: ACI 503.3, oven-dried, washed silica sand.

4. Color and Texture: [As indicated by manufacturer's designations] [Matching existing] [As selected by Architect from full range of industry colors] <Insert requirement>.

C. Polymer Sealer: Low-viscosity [epoxy] [or] [high-molecular-weight methacrylate] penetrating sealer and crack filler recommended by manufacturer for penetrating and sealing cracks in exterior concrete traffic surfaces; [free of VOCs] [VOC content 100 g/L or less]

[VOC content 400 g/L or less] <Insert requirement>.

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

a. Epoxy Sealers:

1) BASF Construction Chemicals - Building Systems; EpoXeal GS.

2) ChemCo Systems; Epoxy Healer Sealer.

3) Euclid Chemical Company (The), an RPM company; [Euco #512 VOC

Epoxy Sealer] [DURAL 335].

4) Sika Corporation, Construction Product Division; Sikadur 55 SLV.

5) Unitex; Pro-Poxy 50-1.

6) US SPEC, Division of US MIX Products Company; Eposeal LVS.

7) <Insert manufacturer's name; product name or designation>.

b. High-Molecular-Weight Methacrylate Sealers:

1) BASF Construction Chemicals - Building Systems; Degadeck Crack Sealer

Plus.

2) Castek, Inc., Subsidiary of Transpo Industries, Inc.; Sealate T70.

3) Kwik Bond Polymers; KBP 204.

4) Sika Corporation, Construction Product Division; SikaPronto 19.

5) <Insert manufacturer's name; product name or designation>.

2. Color: [As indicated by manufacturer's designations] [As selected by Architect from full range of industry colors] <Insert requirement>.

D. Composite Structural Reinforcement: Manufacturer's system consisting of [carbon] [glass]-fiber reinforcement in the form of [tow sheet with field-applied saturant] [preimpregnated sheet] and epoxy primers, fillers, adhesives, saturants, and topcoats, designed for use as externally bonded structural reinforcement for concrete.

1. Products: Subject to compliance with requirements, [provide the following] [provide one of the following] [available products that may be incorporated into the Work include, but are not limited to, the following]:

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a. BASF Construction Chemicals - Building Systems; MBrace [CF 130] [CF 160]

[CF 530] [EG 900] [S&P Laminate].

b. Sika Corporation, Construction Product Division; [SikaWrap] [CarboDur].

c. VSL (VStructural, LLC), a Structural Group company; V-Wrap [C100] [C180]

[C200] [EG50].

d. <Insert manufacturer's name; product name or designation>.

E. Portland Cement: ASTM C 150, Type I, II, or III unless otherwise indicated.

2.8 MIXES

A. General: Mix products, in clean containers, according to manufacturer's written instructions.

1. Do not add water, thinners, or additives unless recommended by manufacturer.

2. When practical, use manufacturer's premeasured packages to ensure that materials are mixed in proper proportions. When premeasured packages are not used, measure ingredients using graduated measuring containers; do not estimate quantities or use shovel or trowel as unit of measure.

3. Do not mix more materials than can be used within time limits recommended by manufacturer. Discard materials that have begun to set.

B. Mortar Scrub Coat: Mix dry ingredients with enough water to provide consistency of thick cream.

C. Dry-Pack Mortar: Mix patching-mortar dry ingredients with just enough liquid to form damp cohesive mixture that can be squeezed by hand into a ball but is not plastic.

D. Concrete: Comply with [Section 033000 "Cast-in-Place Concrete"] [Section 033053

"Miscellaneous Cast-in-Place Concrete"] [Section 033300 "Architectural Concrete."]

E. Grout for Use with Preplaced Aggregate: Proportion according to ASTM C 938. Add grout fluidifier to mixing water followed by portland cement, pozzolan, and fine aggregate.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Notify Architect seven days in advance of dates when areas of deteriorated or delaminated concrete and deteriorated reinforcing bars will be located.

B. Locate areas of deteriorated or delaminated concrete using hammer or chain-drag sounding and mark boundaries. Mark areas for removal by simplifying and squaring off boundaries[ as directed by Architect]. At columns and walls make boundaries level and plumb unless otherwise indicated.

C. Pachometer Testing: Locate at least three reinforcing bars using a pachometer, and drill test holes to determine depth of cover. Calibrate pachometer using depth of cover measurements, and verify depth of cover in removal areas using pachometer.

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D. Perform surveys as the Work progresses to detect hazards resulting from concrete-maintenance work.

3.2 PREPARATION

A. Ensure that supervisory personnel are on-site and on duty when concrete maintenance work begins and during its progress.

B. Preparation for Removal of Deteriorated Concrete: Examine construction to be repaired to determine best methods to safely and effectively perform concrete maintenance work. Examine adjacent work to determine what protective measures will be necessary. Make explorations, probes, and inquiries as necessary to determine condition of construction to be removed in the course of repair.

1. Verify that affected utilities have been disconnected and capped.

2. Inventory and record the condition of items to be removed for reinstallation or salvage.

3. Provide and maintain shoring, bracing, and temporary structural supports as required to preserve stability and prevent unexpected or uncontrolled movement, settlement, or collapse of construction being demolished and construction and finishes to remain.

C. Protect persons, motor vehicles, surrounding surfaces of building being restored, building site, plants, and surrounding buildings from harm resulting from concrete maintenance work.

1. Comply with each product manufacturer's written instructions for protections and precautions. Protect against adverse effects of products and procedures on people and adjacent materials, components, and vegetation.

2. Use only proven protection methods appropriate to each area and surface being protected.

3. Provide barricades, barriers, and temporary directional signage to exclude public from areas where concrete maintenance work is being performed.

4. Erect temporary protective covers over walkways and at points of pedestrian and vehicular entrance and exit that must remain in service during course of concrete maintenance work.

5. Contain dust and debris generated by concrete maintenance work and prevent it from reaching the public or adjacent surfaces.

6. Use water-mist sprinkling and other wet methods to control dust only with adequate, approved procedures and equipment that ensure that such water will not create a hazard or adversely affect other building areas or materials.

7. Protect floors and other surfaces along haul routes from damage, wear, and staining.

8. Provide supplemental sound-control treatment to isolate removal and dismantling work from other areas of the building.

9. Protect adjacent surfaces and equipment by covering them with heavy polyethylene film and waterproof masking tape[ or a liquid strippable masking agent]. If practical, remove items, store, and reinstall after potentially damaging operations are complete.

10. Neutralize and collect alkaline and acid wastes for disposal off Owner's property.

11. Dispose of debris and runoff from operations by legal means and in a manner that prevents soil erosion, undermining of paving and foundations, damage to landscaping, and water penetration into building interiors.

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D. Existing Drains: Prior to the start of work in an area, test drainage system to ensure that it is functioning properly. Notify Architect immediately of inadequate drainage or blockage. Do not begin work in an area until the drainage system is in working order.

1. Prevent solids such as aggregate or mortar residue from entering the drainage system.

Clean out drains and drain lines that become sluggish or blocked by sand or other materials resulting from concrete maintenance work.

2. Protect drains from pollutants. Block drains or filter out sediments, allowing only clean water to pass.

E. Concrete Removal:

1. Provide shoring, bracing, and supports as necessary. Strengthen or add new supports when required during progress of removal work. Do not overload structural elements with debris.

2. Saw-cut perimeter of areas indicated for removal to a depth of at least [1/2 inch (13 mm)] <Insert depth>. Make cuts perpendicular to concrete surfaces and no deeper than cover on reinforcement.

3. Remove deteriorated and delaminated concrete by breaking up and dislodging from reinforcement.

4. Remove additional concrete if necessary to provide a depth of removal of at least [1/2 inch (13 mm)] <Insert depth> over entire removal area.

5. Where half or more of the perimeter of reinforcing bar is exposed, bond between reinforcing bar and surrounding concrete is broken, or reinforcing bar is corroded, remove concrete from entire perimeter of bar and to provide at least a 3/4-inch (19-mm) clearance around bar.

6. Test areas where concrete has been removed by tapping with hammer, and remove additional concrete until unsound and disbonded concrete is completely removed.

7. Provide surfaces with a fractured profile of at least 1/8 inch (3 mm) that are approximately perpendicular or parallel to original concrete surfaces. At columns and walls, make top and bottom surfaces level unless otherwise directed.

8. Thoroughly clean removal areas of loose concrete, dust, and debris.

F. Reinforcing-Bar Preparation: Remove loose and flaking rust from reinforcing bars by [high-pressure water cleaning] [abrasive blast cleaning] [needle scaling] [or] [wire brushing] until only tightly adhered light rust remains.

1. Where section loss of reinforcing bar is more than 25 percent, or 20 percent in two or more adjacent bars, cut bars and remove and replace[ as directed by Architect].

Remove additional concrete as necessary to provide at least 3/4-inch (19-mm) clearance at existing and replacement bars. Splice replacement bars to existing bars according to

ACI 318 (ACI 318M) by lapping, welding, or using mechanical couplings.

G. Preparation of Floor Joints for Repair: Saw-cut joints full width to edges and depth of spalls, but not less than [3/4 inch (19 mm)] [1 inch (25 mm)] [2 inches (50 mm)] <Insert depth> deep. Clean out debris and loose concrete; vacuum or blow clear with compressed air.

H. Surface Preparation for Corrosion-Inhibiting Treatment: Clean concrete to remove dirt, oils, films, and other materials detrimental to treatment application.

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1. Use [low-pressure water cleaning] [detergent scrubbing] [or] [sand blasting] <Insert requirement>.

2. Allow surface to dry before applying corrosion-inhibiting treatment.

I. Surface Preparation for Overlays:

1. Remove delaminated material and deteriorated concrete surface material.

2. Roughen surface of concrete to produce a surface profile matching CSP [3] [4] [5] [6] [7]

[8] [9] according to ICRI 03732.

3. Use [sand blasting] [shot blasting] [scarifying] [needle scaling] [high-pressure water jetting] [scabbling] [flame blasting] [or] [milling] <Insert requirement>.

4. Sweep and vacuum roughened surface to remove debris[ followed by low-pressure water cleaning].

J. Surface Preparation for Sealers: Acid etch surface of concrete to produce a surface profile matching CSP 1 according to ICRI 03732.[ Prepare surface for acid etching by detergent scrubbing to remove oils and films that may prevent acid penetration.]

1. Remove excess acid solution, reaction products, and debris by squeegeeing or vacuuming.

2. Scrub surface with an alkaline detergent, rinse, and squeegee or vacuum.

3. Check acidity of surface with pH test paper and continue rinsing until pH is acceptable to written requirements of sealer manufacturer.

4. When pH is acceptable to written requirements of sealer manufacturer and surface is clean, vacuum dry.

K. Surface Preparation for Sealers: Clean concrete to remove dirt, oils, films, and other materials detrimental to sealer application.

1. Use [shot blasting] [low-pressure water cleaning] [or] [detergent scrubbing] <Insert requirement>.

L. Surface Preparation for Composite Structural Reinforcement: Clean concrete where reinforcement and epoxy patching mortar is to be placed by [low-pressure water cleaning]

[or] [detergent scrubbing] <Insert requirement> to remove dirt, oils, films, and other materials detrimental to epoxy patching mortar.

1. Roughen surface of concrete by sand blasting.

2. Remove delaminated material and deteriorated concrete surface material.

3. Sweep and vacuum roughened surface to remove debris[ followed by low-pressure water cleaning].

3.3 APPLICATION

A. General: Comply with manufacturer's written instructions and recommendations for application of products, including surface preparation.

B. Epoxy-Modified, Cementitious Bonding and Anticorrosion Agent: Apply to reinforcing bars

[and concrete ]by stiff brush or hopper spray according to manufacturer's written instructions.

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Apply to reinforcing bars in two coats, allowing first coat to dry two to three hours before applying second coat. Allow to dry before placing patching mortar or concrete.

C. Epoxy Bonding Agent: Apply to reinforcing bars[ and concrete] by brush, roller, or spray according to manufacturer's written instructions, leaving no pinholes or other uncoated areas.

[Apply to reinforcing bars in at least two coats, allowing first coat to dry before applying second coat. ]Place patching mortar or concrete while epoxy is still tacky. If epoxy dries, recoat before placing patching mortar or concrete.

D. Latex Bonding Agent, Type I: Apply to concrete by brush roller or spray. Allow to dry before placing patching mortar or concrete.

E. Latex Bonding Agent, Type II: Mix with portland cement and scrub into concrete surface according to manufacturer's written instructions. Place patching mortar or concrete while bonding agent is still wet. If bonding agent dries, recoat before placing patching mortar or concrete.

F. Mortar Scrub Coat for Job-Mixed Patching Mortar[ and Concrete]: Dampen repair area and surrounding concrete 6 inches (150 mm) beyond…