§ 15.01.1240. Concrete in hot weather.

When climatic or other conditions are such that the temperature of the concrete may reasonably be expected to exceed ninety degrees Fahrenheit at the time of delivery at the work site, during placement, or during the first twenty-four hours after placement, the following provisions also shall apply:

1.

The developer/contractor shall maintain the temperature of the concrete below ninety degrees Fahrenheit during mixing, conveying, and placing. Methods used shall conform to "Recommended Practice for Hot Weather Concreting," ACI Standard 605.

2.

The concrete shall be placed immediately after mixing. Truck mixing shall be delayed until only enough time remains to finish mixing before the concrete is placed.

3.

Exposed concrete surfaces which tend to dry or set too rapidly shall be continuously moistened by means of fog sprays or otherwise protected from drying during the time between placement and finishing, and after finishing.

4.

Finishing of slabs and other exposed surfaces shall be started as soon as the condition of the concrete allows and shall be completed without delay.

5.

Concrete surfaces exposed to the air shall be covered as soon as the concrete has hardened sufficiently and shall be kept continuously wet for at least the first twenty-four hours of the curing period, for the entire curing period unless curing compound is applied.

6.

Formed surfaces shall be kept completely and continuously wet for the duration of curing period.

7.

If moist curing compound is continued before the end of the curing period, pigmented curing compound shall be applied immediately, following the procedures specified in Section 15.01.1070.F.

(Ord. No. 2007-07-31, § 12.19, 7-10-2007)