![]() ![]() For example, concrete is known to set quicker in hot weather when compared to cold weather. However, anyone who has worked in construction before knows that weather conditions are seldom ideal, which is why contractors must have a firm understanding of the effects of hot weather on concrete structures and how to use weather to their advantage. While concrete can reach its full strength in as little time as a week, it also takes nearly a month for it to cure properly. ![]() ![]() Under fair weather conditions, concrete can take anywhere from 8 to 48 hours to set properly. Contractors should ideally aim to work with, or pour, concrete when it is anywhere from 50-60 º F. The ACI’s (305.1 - 14 Hot Weather Concreting) specifications for setting and mixing concrete in hot weather suggests contractors should try to limit the maximum concrete temperature to 95 º F. The ACI covers a variety of subtopics, ranging from extreme temperatures, humidity levels, wind velocity, natural disasters, saltwater, and freshwater’s effects on concrete in order to give contractors and concrete industry professionals accurate and up-to-date information. The American Concrete Institute’s (ACI) technical publications are an excellent resource that provide insights regarding the plethora of effects of environmental factors on concrete. While working with concrete may come as second nature to many contractors, it is one of the trickiest substances to work with due to how quickly it can change when exposed to different temperatures, humidity, and wind rates. However, anyone who has worked in construction before knows that weather conditions are seldom ideal. According to the ACI, concrete may be affected by, “.one or a combination of the following conditions that tends to impair the quality of freshly mixed or hardened concrete by accelerating the rate of moisture loss and rate of cement hydration, or otherwise causing detrimental results: high ambient temperature high concrete temperature low relative humidity and high wind speed.” Under fair weather conditions, concrete can take anywhere from 8 to 48 hours to set properly. ![]()
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