摘要
玄武岩织物-纤维水泥基复合材料(BFRP-FRCM)复合层具有拉伸应变硬化、多裂缝破坏、变形能力好等优势,已成为当前结构修复与加固工程的首选材料之一。通过单轴拉伸试验研究不同FRCM配比、不同纤维种类和不同玄武岩网格层数对复合层拉伸力学性能的影响。结果表明:BFRP-FRCM复合层在掺入PVA(聚乙烯醇)纤维、PE(聚乙烯)纤维时具有明显的拉伸应变硬化效应,掺入PP(聚丙烯)纤维的复合层试件呈现拉伸软化效应。掺入PE纤维的BFRP-FRCM复合层最大极限拉应变可达3.95%,远高于普通砂浆材料的极限拉应变。复合层的纤维网格掺入量存在最优值。
The excellent mechanical behaviors of Basalt Fabric Reinforced Polymer-Fiber Reinforced Cementitious Matrix(referred as to BFRP-FRCM) composite layer are tensile strain hardening, multi cracking, excellent deformation ability and so on. This makes BFRP-FRCM composite layer as a kind of preferred construction materials for the structural repair or reinforcement. Therefore, this paper presents an experimental study on the significant variables on the mechanical properties of BFRP-FRCM composite layers, including the mixed fibers, FRCM matrix water/binder ratio and basalt mesh layers. Experimental results indicated that BFRP-FRCM composite layers exhibited remarkable tensile strain hardening effect when PVA and PE fibers were mixed, but the layer mixed with PP fibers exhibited tensile softening effect. The maximum ultimate tensile strain of BFRP-FRCM composite layer mixed with PE fibers can reach to 3.95%, which is much larger than that of the mortar materials. The optimal amount of fiber mesh in the composite layers was also presented.
作者
廖维张
王俊杰
王秋婉
LIAO Wei-zhang;WANG Jun-jie;WANG Qiu-wan(Beijing Higher Institution Engineering Research Center of Civil Engineering Structure and Renewable Material,Beijing Advanced Innovation Center for Future Urban Design,Beijing 100044,China;Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《复合材料科学与工程》
CAS
北大核心
2021年第10期42-50,共9页
Composites Science and Engineering
基金
北京建筑大学市属高校基本科研业务费专项资金(X20062,X19007,X20176)
国家自然科学基金项目(51878028)。
