高纤维体积率玻璃纤维增强水泥基材料的力学性能  

Mechanical Properties of Glass Fiber Reinforced Cement-based Materials with High Fiber Volume Fraction

作　　者：张亚晴 李地红 卞立波 李紫轩 冯雨琛 叶国林 ZHANG Ya-qing;LI Di-hong;BIAN Li-bo;LI Zi-xuan;FENG Yu-chen;YE Guo-lin(College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044

出　　处：《科学技术与工程》2022年第8期3269-3276,共8页Science Technology and Engineering

基　　金：国家自然科学基金(51573018)。

摘　　要：为探究高体积率玻璃纤维掺量(>5%)对砂浆力学性能方面的影响,从水泥试块的成型入手,对力学性能、破坏行为等方面展开研究,通过测试不同玻璃纤维长度的高体积率玻璃纤维增强水泥基材料的抗折、抗压性能,并观测、记录其破坏过程和破坏方式,分析其破坏机理和破坏行为,并通过超景深扫描电子显微镜观察玻璃纤维断裂情况。研究结果表明,随着玻璃纤维体积掺量的提升,抗折和抗压性能初始有大幅度提升,分别达到38.6、55.4 MPa,在7%玻璃纤维掺量时基本平稳,掺量超过10%时成型困难;掺量在7%~10%时,抗折应力-应变曲线出现明显的塑性特征。In order to explore the influence of high volumetric glass fiber content(>5%)on the mechanical properties of mortar,starting from the molding of cement test blocks,the mechanical properties and failure behavior were studied.By testing the flexural and compressive properties of high volumetric glass fiber reinforced cement-based materials with different glass fiber lengths,and observing and recording the failure process and failure mode,the failure mechanism and failure behavior were analyzed.The glass fiber breakage was observed by scanning electron microscope with ultra-depth of field.The research results show that with the increase in the volume of glass fiber,the flexural and compressive properties greatly improve initially,reaching 38.6,55.4 MPa,respectively,and they are basically stable when the glass fiber content is 7%.Forming is difficult when the content exceeds 10%.When the content is 7%~10%,the flexural stress-strain curve has obvious plastic characteristics.

关 键 词：玻璃纤维增强水泥基材料 高纤维体积率 力学性能 破坏形态 

分 类 号：TU528.58[建筑科学—建筑技术科学]