摘要
砂浆中掺加聚丙烯纤维能有效地提高砂浆抗裂性、抗冲击性、抗冻性能、抗疲劳特性,但是聚丙烯纤维对砂浆工作性能有很大的影响。在这个研究中,系统研究了聚丙烯纤维长度的变化对砂浆初始流动度、含气量和泌水率等工作性能指标的影响,在此基础上通过对纤维间距及总表面积进行计算,分析了聚丙烯纤维对砂浆工作性能影响的作用机理。
The properties of crack resistance,impact resistance, frost resistance and fatigue resistance of cementitious materials can be improved by adding polypropylene fiber,however,the polypropylene fiber has a larger effect on the working properties.In this study,the effect of length change of polypropylene fiber on initial fluidity, air content and bleeding rate of fresh mortar is studied.On the basis of this, the action mechanism of the effect ofpolypropylene fiber on working properties of fresh mortar is analyzed by calculating on fiber distance and total surface areas.
出处
《混凝土》
CAS
CSCD
北大核心
2011年第12期110-112,共3页
Concrete
关键词
聚丙烯纤维
长度
新拌砂浆
工作性能
影响
polypropylene fiber
length
fresh mortar
working properties
effect
