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Section 03310

    • 3.08

      HOT WEATHER PRECAUTIONS

      • A.

        When air temperature is above 90°F follow recommendations of ACI 305 for hot weather concreting.

3.09

DEFECTS All concrete, exposed or concealed when finished: A. Minor Defects: Patch minor honeycomb, rock pockets and tie holes with specified patching cement, in accordance with the manufacturers recommendations, or submit procedure in accordance with ACI 301, Chapter 9. Finish flush with adjacent surfaces. B. Major Defects: Major defective areas, which affect the strength of the structure, may be required to be patched with cement gun concrete or removed and replaced at no additional cost to the Owner.

    • 3.10

      EXPOSED SURFACES

      • A.

        Vertical surfaces exposed to view, or designated on the Drawings to receive patching cement shall be rubbed to remove fins and projections, and coated with a smooth coat of patching cement to produce a smooth, uniform surface. All exposed corners and edges of beams and columns shall have % inch chamfer.

      • B.

        Concrete specified on the Drawings as Architectural Concrete shall conform to the specifications of ACI 301.

    • 3.11

      CURING AND PROTECTION

      • A.

        General:

Freshly deposited concrete shall be protected from premature drying and excessive hot or cold temperatures, and shall be maintained without drying at a relatively constant temperature for the period of time necessary for hydration of the cement and proper hardening of the concrete. Follow the recommendations of ACI 308 "Curing Concrete".

B. Initial Curing: Initial Curing shall immediately follow the finishing operation. Concrete shall be kept continuously moist at least overnight, utilizing one of the following methods:

  • 1.

    Ponding or Continuous Sprinkling

    • a.

      Absorptive mat or fabric kept continuously wet.

    • b.

      Curing compounds conforming to "Specifications for Liquid Membrane Forming Compounds for Curing Concrete" (ASTM C-309). Such compounds shall be applied in accordance with the recommendations of the manufacturer and shall not be used on any surface against which 7

Section 03310

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