合成材料老化与应用2024，Vol.53Issue(1)：78-80,3.
基于钢纤维与聚丙烯纤维的喷射混凝土弯曲韧性研究
Study on Flexural Toughness of Shotcrete Based on Steel Fiber and Polypropylene Fiber
许锋 1曾林 1柳德虎 1罗兰滨 1杨金光1
作者信息
- 1. 福建冶地恒元建设有限公司,福建福州 350108
- 折叠
摘要
Abstract
Using polypropylene fibers and steel fibers,concrete specimens were prepared with a volume fraction of 0.7％and 1.0％,respectively.Test groups with different fiber sizes and shapes were designed to conduct pre-cut three-point bending tests.The relationship between mid span deflection and concrete bending load was obtained,and the bending toughness coefficient was calculated to compare the differences in bending toughness improvement of sprayed concrete under different fiber addition conditions.The experimental results show that under the same geometric shape of the fibers used,there is a positive correlation between fiber length and concrete bending toughness.However,the influence of fiber length on the workability of concrete should also be considered.Fiber end hooks or surface indentations can improve the adhesion level between the fibers and the matrix to a certain extent.Under the same geometric size of fibers,the toughening effect of sprayed concrete mixed with steel fibers is not as good as that of polypropylene fibers.When 1.0％polypropylene fibers are added,the material's bending toughness index(I5)reaches 13.10.关键词
喷射混凝土/弯曲韧性/钢纤维/聚丙烯纤维/几何尺寸/掺量Key words
shotcrete/bending toughness/steel fiber/polypropylene fiber/geometric dimensions/dosage分类
建筑与水利引用本文复制引用
许锋,曾林,柳德虎,罗兰滨,杨金光..基于钢纤维与聚丙烯纤维的喷射混凝土弯曲韧性研究[J].合成材料老化与应用,2024,53(1):78-80,3.
