Experimental Investigation into the Impact of Polypropylene Fibers and SRA on the Early Crack Resistance of Concrete
Early shrinkage of concrete includes plastic shrinkage before the final setting, drying shrinkage during hardening process and autogenous shrinkage. Concrete drying shrinkage which is caused by evaporation is a major factor for the concrete volume change. By ring constrained test and free shrinkage TONCEN test, this paper studies the impact of polypropylene fibers and SRA on the shrinkage properties of concrete at the early age. The test shows that the polypropylene fibers and SRA can significantly reduce the early shrinkage of concrete, and SRA works more evidently than polypropylene fibers.
Jianmin Zeng, Taosen Li, Shaojian Ma, Zhengyi Jiang and Daoguo Yang
X. S. Xie et al., "Experimental Investigation into the Impact of Polypropylene Fibers and SRA on the Early Crack Resistance of Concrete", Advanced Materials Research, Vols. 194-196, pp. 858-864, 2011