Compliance of Self-Consolidating Concrete for Prestressed Applications

摘要

Estimating the time-dependent behavior of self-consolidating concrete (SCC) is essential for its successful use in prestressed concrete applications. Compliance is the total load-induced strain (elastic and creep strain) at arty age per unit stress caused by a sustained applied load. Compliance of SCC is compared to that of conventional-slump concrete (CSC). Four SCC and one CSC mixtures were made under controlled laboratory conditions and tested under sustained load applied at either 18 hours, 2 days, 7 days, 28 days, or 90 days. All SCC mixtures cured under elevated or standard laboratory temperatures exhibited compliance values less than or similar to the CSC mixture. The accuracy of six compliance prediction methods was also investigated. The compliance prediction accuracy achieved for SCC is similar to that for CSC. The CEB 2010 model was the most accurate compliance prediction method regardless of concrete type or curing condition.