高性能芳纶纤维在水泥基复合材料中的应用  

Application of high performance aramid fiber in cement based composite materials

作　　者：乔艳静 阳知乾 刘建忠 徐德根 李林 周华新 

机构地区：[1]江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室南京(苏博特)高性能工程纤维工程技术研究中心,江苏南京211103

出　　处：《混凝土》2015年第1期94-97,共4页Concrete

基　　金：江苏省自然科学基金(BK2011835);江苏省“六大人才高峰”第十批高层次人才选拔培养项目(2013-JZ-003)

摘　　要：芳纶纤维在水泥基复合材料中的应用日益增加。在分析芳纶纤维热稳定性与耐碱性的基础上,以聚丙烯(PP)纤维及聚乙烯醇(PVA)纤维作为对比,分别考察了芳纶纤维对塑性开裂、砂浆强度及工程水泥基复合材料(ECC)体系的影响。结果表明:芳纶的热稳定性能优异,但强碱性条件下的耐碱性有待改善;芳纶纤维具有比PP纤维更为良好的抗塑性开裂效果,同时芳纶在低水胶比条件下具有良好的增强与增韧效果,且标准养护条件下效果更为显著;芳纶对高纤维掺量ECC的抗弯强度提升效果要显著优于PVA纤维,但挠度略小。The application of aramid fiber in cement based composites is increasing.Based on the thermal stability analysis and alkali resistance of the aramid fiber, the effect of aramid fiber on plastic cracking, the strength of mortar and engineered cementitious composite （ECC） were investigated.The results show that the thermal stability properties of aramid is excellent, but the resistance to strong alkaline conditions need to be improved; the aramid fiber has better anti plastic cracking effect than PP fiber, and the more significant strengthening and toughening effect of aramid fiber at the lower W/C and standard curing condition. The bend strength of aramid fiber reinforced ECC is significantly better than that of PVA fiber, but the deflection is relative small.

关 键 词：芳纶 水泥基复合材料 抗裂 增强 

分 类 号：TU528.041[建筑科学—建筑技术科学]