摘要
制备出新型的纳米二氧化硅改性聚丙烯纤维,测试了纤维的力学性能以及纳米颗粒在纤维表面的分布状况,并将其应用在砂浆与混凝土中.重点研究了改性纤维提高与基材界面性能的机理,主要考察改性纤维的分散性、抗裂性及对砂浆与混凝土力学性能的影响.研究结果表明,改性纤维具有优良的力学性能,二氧化硅在纤维表面均匀分散,纤维与基材的界面性能得到改善,并表现出极佳的分散性与抗裂性,对纤维增强砂浆与混凝土的抗压、抗折强度在一定程度上有所提高.
A new type of nano-silica modified polypropylene fiber was prepared.The mechanical properties of fiber were tested and the distribution of nano-particles on the fiber surface was observed with SEM.This paper focuses on the mechanism of improving fiber-matrix interfacial properties,especially the dispersion of modified fiber and crack resistance and their effects on mechanical properties of fiber reinforced mortar（FRM） and fiber reinforced concrete（FRC）.The results demonstrate that the modified fiber with well-distribution of nano-silica has good mechanical properties,and shows excellent dispersion and crack resistance.The interfacial property of fiber-matrix is improved and the compressive and flexural strength of FRM and FRC is increased to some extent.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第A02期49-55,共7页
Journal of Southeast University：Natural Science Edition
基金
国家重点基础研究发展计划(973计划)资助项目(2009CB623200)
国家自然科学基金资助项目(50908104)
关键词
纳米二氧化硅
聚丙烯纤维
界面性能
抗裂
砂浆
混凝土
nano-silica
polypropylene fiber
interfacial properties
crack resistance
mortar
concrete
