|Table of Contents|

Test on Bonding Behavior of Waste Fiber Recycled Concrete(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年05期
Page:
66-73
Research Field:
Publishing date:

Info

Title:
Test on Bonding Behavior of Waste Fiber Recycled Concrete
Author(s):
ZHOU Jing-hai1;  LIU Yu1;  KANG Tian-bei1;  LIU Ai-xia2
(1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, Liaoning, China; 2. Department of Civil Engineering, Shenyang Urban Construction University, Shenyang 110168, Liaoning, China)
Keywords:
recycled concrete;  bonding behavior;  pullout test;  waste fiber;  ultimate bond stress
PACS:
TU502.5
DOI:
10.19815/j.jace.2021.03092
Abstract:
In order to study the bonding behavior of waste fiber recycled concrete and steel bars, 7 groups and 14 specimens were prepared, and a half-beam unidirectional pullout test was carried out with the replacement rate of recycled aggregates of 0%, 25%, 50%, 75%, 100% and the volume of waste fibers content of 0%, 0.12%, 0.24%. According to the test results, the effective mechanism of the replacement rate of recycled aggregate and the volume of waste fiber on the ultimate bond stress and ultimate slip of concrete was analyzed. The results show that the addition of recycled aggregates was harmful to the bonding behavior of concrete, but does not change the original failure mode of concrete and steel bars. The bonding stress decreases with the increase in the replacement rate of recycled aggregates. The amount of slip decreases firstly and then increases with the increase in the replacement rate of recycled aggregate. With the addition of waste fiber, the bonding interface between recycled concrete and steel bars is promoted, and the bonding behavior of recycled concrete and steel bars is improved. The waste fiber content of 0.12% has the most noticeable improvement effect on the bonding performance. The calculation result of the proposed prediction formula for the ultimate bond stress of waste fiber recycled concrete are in good agreement with the experimental data, which establishes a foundation for further research on bonding behavior and stress prediction of waste fiber recycled concrete and steel bars.

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Last Update: 2021-09-01