Experimental study on fracture properties of hybrid fiber reinforced concrete

被引：4

作者：

Shao, Yunda ^{[1
]}

Wang, Wenfeng ^{[2
]}

机构：

[1] Open Univ China, Coll Engn, Beijing 100031, Peoples R China

[2] Beijing Petrochem Engn Co Ltd, Beijing 100107, Peoples R China

来源：

TRENDS IN BUILDING MATERIALS RESEARCH, PTS 1 AND 2 | 2012年 / 450-451卷

关键词：

hybrid fiber; stress intensity factor; fracture energy; concrete;

D O I：

10.4028/www.scientific.net/AMR.450-451.518

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Though fracture test on the fifteen specimens with notch of hybrid fiber reinforced concrete with the size of 100mmx100mmx400mm, this paper explores the hybrid effect between steel fiber and polypropylene fiber and impact on the fracture properties, such as critical effective crack length, critical crack tip opening displacement, effective stress intensity factors and fracture energy. The test results indicate that the addition of fiber is helpful to improve the fracture properties of concrete. Synergistic effect of two kinds of fibers is good, the steel fiber with high elastic module can restrain the cracking of concrete when the crack displacement is small, polypropylene macro-fiber with high ductility is more beneficial to increase the fracture properties of concrete than steel fiber when the crack displacement is big. The best fiber compounding can be gotten when the volume fractions of steel fiber and polypropylene fiber is respectively 0.5 %and1.0%in this experiment.

引用

页码：518 / +

页数：2