Bond Properties of Plain Steel Bar with Machine-made Sand Concrete (MSC)
To meet the requirement of machine-made sand application in concrete structures, it is necessary to understand the bond properties of steel bar with machine-made sand concrete (MSC). Therefore, the experimental studies were carried out on the bond of plain steel bar with MSC by the central pull-out test method. Three specimens were cast as one group, 6 groups were tested considering the changes of strength grade of MSC and ordinary concrete. The bond-slip curves were measured and analyzed. The results show that the bond slip begins at the tensile side and transfers gradually to the free end before the entire slip turns up along the interface of plain steel bar and surrounded concrete, the largest average bond stress, i. e. the bond strength of plain steel bar corresponds to the initial entire slip of plain steel bar. With the increasing strength grade of MSC and ordinary concrete, the difference of slip at tensile side and free end becomes greater. Comparing that only appears in ordinary concrete with higher strength, the larger slips turn up while the bond stress reaches the largest for the plain steel bar in MSC. Larger scatter of bond strength is between specimens in the same group. Some plain steel bars yields with the beginning of entire slip along the interface.
machine-made sand concrete (MSC) plain steel bar bond stress slip bond strength pull-out test
Shunbo Zhao Xinxin Ding Changyong Li
School of Civil Engineering and Communications North China University of Water Conservancy and Electric Power Zhengzhou 450011, China
国际会议
三峡
英文
2211-2214
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）