Today we use various processes to heat the products to accelerate the hydration reaction and/or provide a high humidity atmosphere to prevent the concrete drying while curing. This provides us with higher early strengths, less chipping, reduced efflorescence, reduced shrinkage, and a generally better product. However, in many cases, we still do not exactly know all the details needed for the process to work. What’s the optimal temperature? Humidity? Should the air circulate? Should we dry the product? How long for each stage of the cycle?