玻璃纤维参数对水泥砂浆减裂效果的影响  

Effect of glass fiber parameters on plastic shrinkage cracking of mortar

作　　者：何健辉 程从密[1] 张亚芳[1] 洪斯磊 HE Jianhui;CHENG Congmi;ZHANG Yafang;HONG Silei(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《混凝土》2020年第10期118-120,160,共4页Concrete

基　　金：国家自然科学基金项目(51678170)。

摘　　要：系统研究了玻璃纤维对水泥砂浆塑性收缩开裂减裂效果的影响。结果研究表明:掺入玻璃纤维可有效防止水泥砂浆收缩开裂,随着纤维掺量和长度的增加,开裂总面积不断减小和抗开裂性能比不断增大;直径较小的玻璃纤维在塑性阶段减裂效果更好;把纤维掺量、长径比参数简化为参数D×Ldf与裂缝总面积拟合出相关性系数较高的公式,能够较好反映不同纤维参数对塑性收缩裂缝的抑制效果。The effect of high performance glass fibers on the plastic cracking of mortar was studied systematically.The experimental results show that glass fibers can effectively prevent shrinkage cracking of cement mortar.With the increase of fiber content and length,the total area of cracking and the ratio of cracking resistance increase continuously,and the smaller diameter glass fibers have better cracking reduction effect in plastic stage.By simplifying the parameters of fiber content and aspect ratio into parameters D×Ldfand the total area of cracks,a formula with high correlation coefficient is obtained,which can better reflect the crack suppression effect of different fiber parameters.

关 键 词：玻璃纤维 塑性收缩开裂 抗裂性能 砂浆 

分 类 号：TU528.01[建筑科学—建筑技术科学]