耐碱玻璃纤维网格砂浆板拉伸性能的试验研究

doi:10.19936/j.cnki.2096-8000.20220228.016

摘要/Abstract

摘要： 为掌握玻璃纤维网格增强砂浆薄板单轴拉伸力学特性,试验共设计两组玻璃纤维网格增强砂浆薄板的受拉试件,一组采用普通砂浆基体,另外一组采用环氧砂浆基体,两组均含有不同层数的玻璃纤维网格。试验参数为纤维网格层数、砂浆种类及龄期。通过对玻璃纤维网格增强砂浆薄板进行拉伸试验,观察破坏过程和破坏形态,研究试验参数变化对板拉伸力学性能的影响。试验结果表明:玻璃纤维网格可有效提高试件的承载力及变形能力,网格层数为1、2、3、4层的普通砂浆试件的峰值荷载较未配置纤维网格试件分别提高16%、107%、203%和348%,网格层数为1、2、3、4层的环氧砂浆试件的峰值荷载较未配置纤维网格试件分别提高41%、50%、130%和249%,纤维网格层数增加,薄板拉伸峰值荷载增加明显;当纤维网格层数相同时,环氧砂浆试件峰值荷载及其对应的变形和破坏时的极限变形较普通砂浆试件大;与龄期为28 d比较,龄期为365 d时,1、2、3、4层纤维网格普通砂浆的峰值荷载分别提高34%、37%、29%和7%,1、2、3、4层纤维网格环氧砂浆试件的峰值荷载分别提高了26%、36%、40%和21%。

关键词: 玻璃纤维, 拉伸性能, 纤维利用率, 龄期, 复合材料

Abstract: In order to study the uniaxial tensile mechanical properties of glass fiber textile mortar slabs, two groups of glass fiber textile mortar slabs of tensile were tested. The ordinary mortar matrix and the epoxy mortar matrix were used, respectively, which contained different glass fiber textile layers. Through tensile test of glass fiber textile reinforced mortar slabs, the failure process and failure mode were observed, and the influence of the number of layers of fiber textile, types of mortar and age on the tensile mechanical properties of the slabs was analyzed. The test results showed that the glass fiber textile can effectively improve the bearing capacity and deformation capacity of the specimens. The peak loads of ordinary mortar specimens with 1, 2, 3 and 4 layers were 16%, 107%, 211% and 357% higher than that without glass fiber textile. The peak loads of epoxy mortar specimens with 1, 2, 3 and 4 layers were 41%, 50%, 130% and 249% higher than that without glass fiber textile, respectively. The peak loads of slabs increased obviously with the increase of glass fiber textile layers. When the glass fiber textile layers were the same, the peak loads of epoxy mortar slabs and its corresponding deformation and ultimate deformation at failure were higher than that of ordinary mortar slabs. Compared with the specimens whose curing age was 28 days, the peak loads of ordinary mortar specimens reinforced with 1, 2, 3 and 4 fiber layers curing age 365 days increased by 34%, 37%, 29% and 7%, respectively. And compared with the specimens whose age was 28 days, the peak loads of epoxy mortar specimens with 1, 2, 3 and 4 fiber layers aged 365 days increased by 26%, 36%, 40% and 21%, respectively.

Key words: glass fiber textile, tensile properties, fiber utilization rate, age, composites

中图分类号:

TB332

赵洪飞, 张译文, 王卫东, 邓宗才, 赵洋, 刘青, 刘皓. 耐碱玻璃纤维网格砂浆板拉伸性能的试验研究[J]. 复合材料科学与工程, 2022, 0(2): 99-106.

ZHAO Hong-fei, ZHANG Yi-wen, WANG Wei-dong, DENG Zong-cai, ZHAO Yang, LIU Qing, LIU Hao. Experimental research on the tensile properties of glass fiber textile reinforced mortar[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(2): 99-106.

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