Effect of Limestone Powder on Shrinkage Performance of Self-Compacting Concrete

Abstract

Abstract: In order to study the effect of limestone powder on the shrinkage performance of self-compacting concrete, tests with different water to binder ratios and mass fractions of limestone powder were designed, and the change rules of autogenous shrinkage and drying shrinkage of self-compacting concrete at the age of 28 d with water to binder ratio of 0.30, 0.34, 0.37 and mass fraction of limestone powder of 0%, 10%, 20% were obtained. The results show that the autogenous shrinkage increases with the decrease of water to binder ratio, and increases with the increase of mass fraction of limestone powder. When water to binder ratio ranges from 0.30 to 0.37, its effect on drying shrinkage is not significant. The moderate amount of limestone powder almost has no effect on drying shrinkage, and when the mass fraction of limestone powder reaches 20%, the drying shrinkage increases significantly. The forecast models of autogenous shrinkage and drying shrinkage of self-compacting concrete considering the effect of water to binder ratio and limestone powder mass fraction were proposed on the basis of tests.

Key words: self-compacting concrete, autogenous shrinkage, drying shrinkage, limestone powder, water to binder ratio, forecast model

CLC Number:

TU528.041

HE Shiqin, GAO Pengfei, BAI Ziyun, WANG Hui, SUN Dongxing, XU Shaofeng. Effect of Limestone Powder on Shrinkage Performance of Self-Compacting Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(10): 3428-3435.

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