A Review on the Determination of the Protecting Duration of Frost Damage at Early Ages in Cold Weater Concreting Based on the Analysis of Strength Development

강도증진해석에 의한 한중콘크리트의 초기동해 방지기간 설정에 관한 검토

A protections from the frost damage at early ages is one of the serious problems to be considered in cold weather concreting. Frost damage at early ages brings about the harmful influences on the concrete structures such surface cracks and the loss of strength. Therefore, in this paper, the protecting durations of frost damage at early ages according to the standard specifications provided in KCI(Korean Concrete Institute) are suggested by appling logistic curve, which evaluates the strength development of concrete with maturity. According to the results, as W/C and compressive strength for protecting from frost damages at early ages increased, longer protecting duration is required. It shows that the protecting durations of FAC(Fly Ash Cement) are longer than those of OPC(Ordinary Portland Cement).