Effect of Sisal Fiber on Fracture Performance of Recycled Aggregate Concrete

被引：0
|
作者：
Xiao J. [1 ,2 ]
Xu J. [1 ]
Luo S. [1 ]
Zhang K. [1 ]
Zhang Q. [1 ]
机构：
[1] College of Civil Engineering, Fuzhou University, Fuzhou
[2] College of Civil Engineering, Tongji University, Shanghai
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 06期
关键词：
fracture energy; fracture toughness; recycled aggregate concrete（RAC）; sisal fiber; three‑point bending beam test;
D O I：
10.3969/j.issn.1007-9629.2023.06.003
中图分类号：
学科分类号：
摘要：
In order to improve the fracture performance of recycled aggregate concrete （RAC）， the effects of recycled coarse aggregate （RCA） and sisal fiber on the fracture performance of RAC were studied based on the three‑point bending beam test by mixing sisal fiber into RAC. The results show that， compared with ordinary concrete， the initiation toughness， instability toughness and fracture energy of RAC without sisal fiber are reduced by 20.36%， 17.36% and 20.66%， respectively， when the replacement rate of RCA is 100%. When the length of sisal fiber is 10 mm， and its volume fraction is 0.2%， it has the best improvement effect on the initiation toughness of RAC， which is 37.81% higher than that of RAC without sisal fiber. In terms of instability toughness and fracture energy， the optimal volume fraction of sisal fiber is 0.3%. In summary， the incorporation of sisal fiber can effectively improve the fracture performance of RAC. © 2023 Tongji University. All rights reserved.
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页码：587 / 595
页数：8
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