Several curing methods will keep concrete moist and, in some cases, at a favorable hydration temperature. They
fall into two categories: those that supply additional moisture and those that prevent moisture loss. Table 4-3 list
several of these effective curing methods and their advantages and disadvantages.
Table 4-3. Curing methods.
PART D - TEMPERATURE EFFECTS ON CONCRETE
Concreting in hot weather poses some special problems, such as strength reduction and cracking of flat surfaces
due to too-rapid drying. Concrete that stiffens before you can consolidate it is caused by too-rapid setting of the
cement and too much absorption and evaporation of mixing water. This leads to difficulty in finishing flat
surfaces. Therefore, limitations are imposed on placing concrete during hot weather and on the maximum
temperature of the concrete because quality and durability suffer when concrete is mixed, placed, and cured at
high temperatures. During hot weather, take steps to limit concrete temperature to less than 90‡F, but you can
have problems even with concrete temperatures less than 90F. The combination of hot, dry weather and high
winds is the most severe condition, especially when placing large exposed slabs.