The Effects of Curing Age on the Creep and Shrinkage of Lightweight Concrete

摘要

This research studied the effects of curing age on the creep and shrinkage of lightweight concrete. Creep values of lightweight aggregate concrete cured for 7 days and 14 days were compared. The shrinkage and creep values of concrete specimens cured for 7 days were higher than those of 14-day specimens. The total shrinkages of the lightweight concrete cured for 7 days and 14 days were 0.62x10~(-3) and 0.65x10~(-3) respectively; the drying shrinkages were 0.51x10~(-3) and 0.48x10~(-3) respectively. The total creep values of the lightweight concrete specimens cured for 7 days and 14 days were 0.9x10~(-3) and 0.8x10~(-3) while the corresponding basic creep values were 0.88x10~(-3) and 0.67x10~(-3) respectively. The findings indicated that curing age has a significant effect on the autogenous shrinkage of lightweight concrete. The magnitudes of the drying shrinkage and total creep were similar to those of normal weight concrete.