EMS18_-_Concrete_Supply_-_Concrete_SPECS_REVISED_010318.pdf

Self-Consolidating Concrete (SCC)

SECTION TABLE OF CONTENTS

DIVISION 03 - CONCRETE

SECTION 03 31 25

SELF - CONSOLIDATING CONCRETE (SCC)

PART 1 GENERAL

1.1 SCOPE

1.2 REFERENCES

1.3 SUBMITTALS

1.4 WEATHER LIMITATIONS

1.4.1 Placing and Protection of Concrete During Cold-Weather

1.4.2 Placing and Protection of Concrete During Hot-Weather

1.5 PLANT, EQUIPMENT, MACHINES, AND TOOLS

1.5.1 General Requirements

1.5.2 Mix Plant

1.6 Self-Consolidating Concrete

1.7 SELF-CONSOLIDATING CONCRETE MIXTURE PROPORTIONS

PART 2 PRODUCTS

2.1 MATERIALS

2.2 Cementitious Materials

2.2.1 Portland Cement

2.2.2 Pozzolan

2.2.3 Ground Granulated Blast-Furnace Slag

2.2.4 Silica Fume

2.3 Aggregates

2.4 Air-entraining Admixture

2.5 Water-Reducing, Retarding, or Accelerating Admixtures

2.6 Plasticizing Admixtures

PART 3 EXECUTION

3.1 PLACING

3.2 TRANSPORTING CONCRETE TO PLACEMENT SITE

3.3 WAYBILLS AND DELIVERY TICKETS

ATTACHMENTS:

Attachment A - ACI STRENGTH DESIGN **** 4500 P.S.I. AE

-- End of Section Table of Contents --

SECTION TABLE OF CONTENTS 03 31 25 Page 1

SECTION 03 31 25 Page 1

SECTION 03 31 25

SELF - CONSOLIDATING CONCRETE (SCC)

PART 1 GENERAL

1.1 SCOPE

The work covered by this section consists of furnishing all plant, labor, materials, and performing all operations in connection with furnishing self consolidating concrete as indicated. The Contractor shall design and test the self-consolidating concrete and supply the material. The government will be responsible for placing the concrete and performing any quality assurance testing on site.

1.2 REFERENCES

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 C1017/C1017M-13 (2013e) Standard Specification for Chemical Admixtures for Use in Producing Flowing Concrete

ASTM C1077-17 (2015a) Standard Practice for Laboratories Testing Concrete and Concrete Aggregates for Use in Construction and Criteria for Laboratory Evaluation

ASTM C1240-15 (2015) Standard Specification for Silica Fume Used in Cementitious Mixtures

ASTM C150/C150M-17 (2015) Standard Specification for Portland Cement

ASTM C260/C260M-10A (2010a) Air-Entraining Admixtures for Concrete

ASTM C33/C33M-16 (2013) Standard Specification for Concrete Aggregates

ASTM C403/C403M-16 (2008) Standard Test Method for Time of Setting of Concrete Mixtures by Penetration Resistance

ASTM C494/C494M-17 (2015) Standard Specification for Chemical Admixtures for Concrete

ASTM C618-17 (2015a) Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete

SECTION 03 31 25 Page 2

ASTM C94/C94M-17A (2015a) Standard Specification for Ready-Mixed Concrete

ASTM C989/C989M-17 (2014) Standard Specification for Slag Cement for Use in Concrete and Mortars

Commonwealth of Pennsylvania DEPARTMENT OF TRANSPORTATION(PENNDOT)

BULLETIN 42 (2015) Publication 42 - Producers of Ready Mix Concrete:

1.3 SUBMITTALS

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

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following information to the Contracting Officer:

SD-05 Design Data

Self-Consolidating Concrete Mixture Proportions; G, DO

Concrete mixture proportions shall be determined by the Contractor, in accordance with the requirements in paragraph

1.7 SELF-CONSOLIDATING CONCRETE MIXTURE PROPORTIONS, and

submitted for review and approval at least 30 business days before placement.

SD-06 Test Reports

Field Quality Control

SD-07 Certificates

Testing Technicians

The Contractor shall submit statements that the concrete testing technicians meet the requirements of paragraph 1.7 SELF-

CONSOLIDATING CONCRETE MIXTURE PROPORTIONS.

Waybills and Delivery Tickets

Copies of certified delivery tickets for all concrete used in the construction.

1.4 WEATHER LIMITATIONS

1.4.1 Placing and Protection of Concrete During Cold-Weather

Concrete placement shall be discontinued when the air temperature reaches 35 degrees F and is falling. Placement may begin when the air temperature reaches 35 degrees F and is rising. The aggregates shall be free of ice, snow, and frozen lumps before entering the mixer. The government will ensure the concrete is protected from freezing for the first 7 calendar days after placement.

SECTION 03 31 25 Page 3

1.4.2 Placing and Protection of Concrete During Hot-Weather

The temperature of the concrete as placed shall not exceed 95 degrees F.

The mixing water and/or aggregates shall be cooled, if necessary, to maintain a satisfactory placing temperature. The government will take any other precautions necessary for hot weather placement.

1.5 PLANT, EQUIPMENT, MACHINES, AND TOOLS

1.5.1 General Requirements

Provide plant, equipment, machines, and tools used in the work shall be subject to approval and shall be maintained in a satisfactory working condition at all times. The equipment shall have the capability of producing the required product, and placing the required product. Use of the equipment shall be discontinued if it produces unsatisfactory results.

The Contracting Officer shall have access at all times to the plant and equipment to ensure proper operation and compliance with the specifications.

1.5.2 Mix Plant

Ready-mixed concrete shall conform to ASTM C94/C94M except as otherwise specified. Batch tickets shall meet the requirements of ASTM C94/C94M.

Batch tickets shall include additional information as specified in paragraph 14.2 of ASTM C94/C94M. Additional information shall include the weight of fine and coarse aggregate, amount of cementitious materials (Portland cement, fly ash, slag, and silica fume), amount of admixtures, free water on aggregates, batch water, amount of water that can be added on site, design water/cement ratio, and maximum size of aggregate.

1.6 SELF-CONSOLIDATING CONCRETE

Self-consolidating concrete shall have a minimum compressive strength of 4,500 psi at 28 calendar days. The maximum water to cement ratio shall not exceed 0.50 by weight. SCC shall have air content by volume of concrete of 5 to 8 percent. The slump shall be between 9 and 11 inches and the flow shall be between 18 and 24 inches. The visual stability index shall be 0 to 1. The minimum initial set time of the mixture shall be four hours.

1.7 SELF-CONSOLIDATING CONCRETE MIXTURE PROPORTIONS

A mix design previously used on a similar project in USACE-Pittsburgh District is included as Attachment A - ACI STRENGTH DESIGN **** 4500 P.S.I.

AE to this specification section. The mix design provided as Attachment A may be utilized by the contractor, but must be submitted for approval as a requirement of this specification. The Self-Consolidating Concrete mixture proportions shall be determined by the Contractor, and submitted for review and approval at least 30 business days before placement. The submission shall be accompanied by test reports from a laboratory validated by the USACE-ERDC- MTC which show that proportions thus selected will produce concrete of the qualities indicated. No substitution shall be made in the source or type of materials used in the work without additional tests to show that the quality of the new materials and concrete are satisfactory.

SECTION 03 31 25 Page 4

No mix design shall be used until notice of acceptance has been given by the Contracting Officer. All items listed below shall be included in the Concrete Mixture Proportioning:

a. The concrete mixture quantities (mass) of all ingredients per cubic yard that will be used in the manufacture of the concrete shall be stated.

The mass of the aggregates shall be in a saturated surface-dry condition. Ingredients shall include Portland cement, pozzolan, silica fume, ground granulated blast-furnace slag, coarse aggregate, fine aggregate, admixtures, and water. The maximum water-cement ratio shall be stated.

b. The slump flow may be adjusted by the Contractor to aid placement. The Contractor shall submit a range for the slump flow that will suspend particles within the mixture and will not cause segregation.

c. Names, types, and quantities of the admixtures shall be stated.

Manufactures literature of all admixtures used shall be submitted.

d. Gradations test results for the coarse and fine aggregates. Submit supplier's certification of compliance that states the material supplied meets the requirements of the specification under which they are furnished.

e. Certified copies of laboratory test reports for cementitious materials, including mill tests and all other test data, for Portland cement, pozzolan, ground granulated blast furnace slag, and silica fume.

Cementitious materials will be accepted on the basis of the manufacturer's certification of compliance, accompanied by mill test reports that materials meet the requirements of the specification under which they are furnished. Certification and mill test reports shall be from samples taken from the particular lot furnished.

f. Test results showing the concrete is capable of producing the required strengths, slump flow, visual stability index, and air content. High quality colored photos of the visual stability index test results shall be submitted.

g. Test the SCC mixture for initial and final set times in accordance with ASTM C403/C403M. Submit results as part of the mix design.

PART 2 PRODUCTS

2.1 MATERIALS

Materials will be subject to check testing from samples obtained at the source, at transfer points, or at the project site, as scheduled by the Contracting Officer, and such sampling will be by the Contractor at its expense. Material not meeting specifications shall be promptly removed from the site of work.

SECTION 03 31 25 Page 5

2.2 CEMENTITIOUS MATERIALS

Cementitious materials shall be Portland cement in combination with one or more of the following supplementary cementitious materials: pozzolan, silica fume, and/or ground granulated blast-furnace slag. Pozzolan content shall not exceed 35 percent by weight of total cementitious materials.

Cementitious materials shall conform to appropriate specifications listed below. Use one manufacturer of each type of Portland cement, pozzolan, silica fume, and/or slag cement.

2.2.1 Portland Cement

ASTM C150/C150M, Type II, low alkai.

2.2.2 Pozzolan

Pozzolan shall conform to ASTM C618, Class F.

2.2.3 Ground Granulated Blast-Furnace Slag

Ground granulated blast-furnace slag shall conform to ASTM C989, Grade 100 or 120.

2.2.4 Silica Fume

Silica fume shall conform to ASTM C1240.

2.3 AGGREGATES

All coarse aggregates shall be crushed limestone and comply with the quality requirements of ASTM C33/C33M, Class 4S. Coarse aggregate shall conform to the requirements of ASTM C33/C33M, Gradation 67. All fine aggregates shall conform to PENNDOT Type A concrete sand.

Aggregates shall come from a Pennsylvania Department of Transportation (PENNDOT), West Virginia (WVDOT), or Ohio (ODOT) approved source.

2.4 AIR-ENTRAINED ADMIXTURE

ASTM C260/C260M. Air-entraining admixture will be accepted on the basis of literature from suppliers which demonstrates compliance with applicable specifications.

2.5 WATER-REDUCING, RETARDING, OR ACCELERATING ADMIXTURES

ASTM C494/C494M, Type A, B, C, D, E, F, or G.

2.6 PLASTICIZING ADMIXTURES

Plasticizing admixtures shall conform to ASTM C1017/C1017M, Type I or Type II, or ASTM C494/C494M, Type G.

SECTION 03 31 25 Page 6

PART 3 EXECUTION

3.1 PLACING

The Government will place and test the concrete.

3.2 TRANSPORTING CONCRETE TO PLACEMENT SITE

Transport concrete to the placing site for use by the government. The Government will be responsible for placing the concrete on-site.

3.3 WAYBILLS AND DELIVERY TICKETS

Before the final statement is allowed, file certified waybills and certified delivery tickets for all concrete actually used, as specified in the Submittals paragraph.

-- End of Section --

ATTACHMENT A

*ACI 318 ACI STRENGTH DESIGN **** 4500 P.S.I. AE

*ACI 301

*ACI 211.1 Self - Consolidating Concrete ( SCC )

*ACI 614

Air Content 6.0 % Maximum W/C Ratio 0.50 Max. Slump 9-11” Minimum **Cement./CY. 650 lbs.

Flow 18-24” Maximum Pozzolan Replacement - 35%

Cement Spec. ASTM-C150 Type II LA Sp.Gr. 3.15

GGBFS Spec. ASTM-C989 Grade 100

Sp. Gr. 2.82

Coarse Agg. #67 Spec. ASTM C 33

Absorp 0.59% SSD Type Sp.Gr.

PCF

Limestone 2.70

95.40 lbs./cf

Fine Agg. Conc.Sand Spec. ASTM C 33 D.O.T. type A conc. sand Type

Absorp 2.34% SSD Sp.Gr.

F.M.

Natural 2.63 2.76

AEA Spec. ASTM-C260 ** As required

WRA Spec. ASTM-C494 ** As required

HYDRATION Spec. ASTM-C494

STABILIZER

HRWR Spec. ASTM-C494 ** As required

*Calculated Mix Design Proportions*

W/C Ratio 0.43 W./CY.

**Cement./CY. 650 lbs 6.91 sks.

* Cement 4.52 sks. 425 lbs. 2.16 cf.

* Pozzolan 2.39 sks. 225 lbs. 1.28 cf.

TOTAL Cementitious 650 lbs. 3.44 cf.

C.A. # 67 1500 lbs. 8.90 cf.

Water 33.61 Gal. 280 lbs. 4.49 cf.

Air 6.0 % 0 1.62 cf.

AEA 0.2 oz. ** 0 0.00 cf.

WRA 16.25 oz. ** 0 0.00 cf.

Hyd. Stabilizer 3.25 oz. ** 0 0.00 cf.

HRWR 21.20 oz. ** 0 0.00 cf.

Sub-Total 2430 lbs. 18.45 cf.

F.A. 1403 lbs. 8.55 cf.

Total 3833 lbs. 27.00 cf.

Calculated Wet Unit Wt. 141.96 lbs.