碳酸钙晶须混杂聚乙烯纤维增强水泥基复合材料力学性能研究  

Mechanical Properties of Calcium Carbonate Whisker Hybrid Polyethylene Fiber Reinforced Cement-Based Composite

作　　者：陈月顺 汤成宇 CHEN Yueshun;TANG Chengyu(School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 434000,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,武汉434000

出　　处：《硅酸盐通报》2024年第1期16-26,共11页Bulletin of the Chinese Ceramic Society

摘　　要：为研究碳酸钙晶须掺量对聚乙烯纤维增强水泥基复合材料(PE-ECC)力学性能及微观结构的影响,设计了4组不同碳酸钙晶须掺量的PE-ECC试件,对其进行抗压性能试验、抗拉性能试验、三点弯曲断裂性能试验,并使用XRD、SEM、NMR技术对其微观结构进行研究。结果表明,碳酸钙晶须对PE-ECC有增强增韧作用,随着碳酸钙晶须掺量增加,这种增强增韧作用呈先增大后减小的趋势,当碳酸钙晶须掺量为1%(体积分数)时,PE-ECC的抗压性能、拉伸性能、断裂性能提升最佳。适量的碳酸钙晶须能填充基体,减少少害孔及多害孔数量,改善孔隙结构。In order to study the influence of calcium carbonate whisker with different content on the mechanical properties and microstructure of polyethylene fiber reinforced cement-based composite(PE-ECC),four groups of PE-ECC specimens with different content of calcium carbonate whisker were designed,and the compressive properties,tensile properties and three-point bending fracture properties were tested on them.The microstructure was studied by XRD,SEM and NMR.The results show that calcium carbonate whisker can strengthen and toughen PE-ECC.With the increase of calcium carbonate whisker content,the strengthening and toughening effects first increase and then decrease.When the content of calcium carbonate whisker is 1%(volume fraction),the compressive properties,tensile properties and fracture properties of PE-ECC are improved best.Appropriate amount of calcium carbonate whisker can fill the matrix,reduce the number of less and more damaged pores,and improve pore structure.

关 键 词：水泥基复合材料 碳酸钙晶须 PE纤维 拉伸性能 断裂性能 微观结构 

分 类 号：TU528[建筑科学—建筑技术科学]