Evaluation of Shrinkage Induced Cracking in Concrete with Impact of Internal Curing and Water to Cement Ratio

• DOI: 10.3151/jact.14.324
• Publication Date: 2016-07-05T22:08:45Z
• Authors: Jun Zhang; Yudong Han; Jiajia Zhang
• Keywords: Shrinkage

In this paper, the effect of internal curing with pre-soaked lightweight aggregate (PSLWA) on shrinkage and interior relative humidity four series concretes compressive strength at 28 days around 30MPa, 60MP, 90MPa 100MPa is investigated. The induced cracking performance evaluated concrete-steel composite ring tests. results show that development concrete since casting exhibits first a vapor saturated stage (RH=100%, I), followed by gradually reducing (RH<100%, II). Under sealing, center specimen for given age obviously decreased increase strength. drying, similar value observed all without curing. As PSLWA was added, reduction rate in II significantly decreased. But efficiency rising greatly influenced autogenous in-creased drying total increased both shrinkages high concretes, such as concretes. relatively low concrete, 30MPa 60MPa not obvious. Internal can improve performance. All rings are cracked under drying. strain steel about 75 to 101μm/m. By contrast, stable inner becomes 10 40μm/m no visible cracks were found specimens.