A review of past research on the effect of heat curing on strength, frost resistance, and AASHTO T 277 (a lso ASTM C 1202) 11COulomb11 values is presented, and the research experience compared to present-day codes, specifications, and test methods. Historically, properly heat-cured concretes produced at low water-cement ratios have been found to have strength and frost resistance properties equal to or better than conventionally-cured concretes. The AASHTO T 277 test and the similar ASTM C 1202 test were also reviewed as they relate to precast concrete, revealing that significant questions remain regarding their appropriateness for use in concrete project materials qualifications and specifications.
