MATERIALS AND PRODUCTS FOR CONCRETE WORK

The Installer contractor shall supply materials (including cement, aggregates, water, and admixtures) that comply with ASTM C 94 and as specified in this article.

Concrete materials, as applicable, shall be properly identified after testing at place of manufacture.

MATERIALS AND PRODUCTS FOR CONCRETE WORK

MATERIALS AND PRODUCTS FOR CONCRETE WORK

MATERIALS AND PRODUCTS FOR CONCRETE WORK

Cement

Portland Cement concrete shall conform to the requirements of ASTM C 150. Type I shall be used unless otherwise specified on the contract drawings.

Only one brand and source of cement shall be used for the entire project, unless a change is specifically permitted by the Client representative.

Concrete Aggregates

Concrete aggregates shall conform to ASTM C33. Maximum size shall not exceed 1/5 of the narrowest form dimension, 3/4 of the minimum clear spacing between reinforcing bars, and in no case be larger than 38 mm (1 1/2 in), unless otherwise specified on the contract drawings.

Water

Water used in mixing concrete shall conform to the requirements of Section 3.4 of ACI 318.

Water must be clean and free from injurious oils, acids, alkalies, organic materials, or other deleterious substances.

Admixtures

  • Admixtures shall conform to the requirements of Section 3.6 of ACI 318.
  • Concrete admixtures shall be used in accordance with the manufacturer’s printed instructions.
  • Water-reducing admixtures (Type A, D, or F) may be added to concrete mixes, except that the Type D admixture for cold weather concrete shall be used.
  • All admixtures shall be added at the batch plant unless otherwise specified.
  •  Admixtures may be selected from the following table without prior approval:
Admixture Products Manufacturers
Air-entraining (ASTM C 260) MB-VR Standard

DARAVAIR

BASF – The Chemical Company

Grace Concrete Products

Water-reducing

(ASTM C 494 – Type A)

POZZOLITH 200N

WRDA with HYCOL

BASF – The Chemical Company

Grace Concrete Products

Water-reducing Retarder

(ASTM C 494 – Type D)

POZZOLITH 100-XR

DARATARD-17

BASF – The Chemical Company

Grace Concrete Products

High Range Water Reducer (ASTM C 494 – Type F) GLENIUM 7107

ADVA 140M

BASF – The Chemical Company

Grace Concrete Products

  • Fly ash (Class C or Class F) shall be in accordance with ASTM C-618 and shall only be used with the prior approval of Air Products. The amount of fly ash that may be substituted for cement shall be less than 20% by weight of the total cement intended for the designated mix and shall not exceed 100 lbs per cubic yard of concrete. Class F is recommended where sulfate resistance is a concern. Concrete mixes with Class C typically will develop higher early strengths than Class F mixes.
    • Use only one source of fly ash. Each shipment shall have test reports (at a frequency of not less than one test for each 50 tons of fly ash delivered) certifying compliance with ASTM C 311.
  • Use of blast furnace slag is prohibited.
  • Use of calcium chlorides is prohibited.

Curing Compounds

  • All compounds shall conform to the requirements of ASTM C 309 Type 1. Curing compounds shall be used in accordance with the manufacturer’s printed specifications.
  • The contractor is not permitted to use compounds on surfaces that will receive additional concrete.
  • Curing compounds may be selected from the following list or an approved equal:

R. Meadows – 1600-White

L&M Construction Chemicals Inc. – L&M Cure

    • The use of curing compounds other than those listed is strictly prohibited without the prior written permission of the Air Products representative.

Water Stops

Water stops shall be either a PVC dumbbell type without center bulb or pre-formed plastic adhesive nonexpansive water stops. PVC dumbbell type will typically be 6 inches wide and the pre-formed plastic adhesive type will typically be 3/4 inch by 1 1/4 inch in cross-section. Any deviations from this size shall be as indicated on the contract drawings.

Vapor Barrier

Vapor barriers placed under concrete slabs shall be of 4 mil thick polyethylene plastic sheeting.

Expansion Joint Filler and Sealer:

  • Expansion joint filler shall be continuous, 1/2 inch thick, organic (closed cell) nonextruding semi-rigid PVC foam that satisfies the requirements of ASTM D1667 Grade DE-45. Joint sealer shall be two component polysulfied rubber sealant. Color shall be medium gray. All products shall be applied in accordance with the manufacturer’s recommendations. Materials mentioned as follows are approved for use:
  • Expansion Joint Filler

               –     Rodofoam Grade #327

  • Joint Sealer

                     –     W. R. Meadows DecoSeal 150 (vertical and non-traffic bearing horizontal joints)

                     –     W. R. Meadows DecoSeal One Step (typical horizontal joints exposed to pedestrian/vehicular traffic)

  • Primer

                     –     W. R. Meadows P/G Primer

Water Seal:

Water seal shall be a clear water-based acrylic concrete sealer.

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