摘要
为了制备超高韧性的水泥基复合材料(UHTCC),通过抗压、抗折以及直接拉伸试验,探讨纤维掺量、纤维种类对水泥基材料力学性能的影响.研究结果表明:有机纤维的掺入都不同程度地降低了UHTCC的抗压强度,提高了其抗折强度;从力学性能以及材料成本综合考虑,聚乙烯醇纤维(PVA)体积掺量2%为最优掺量;掺入日本PVA的UHTCC的拉伸应变硬化现象最显著,其次是国产PVA纤维,而国产聚丙烯纤维(PP)和聚乙烯纤维(PE)在拉伸过程中没有应变硬化现象.
In order to prepare ultra high toughness cementitious composites（UHTCC）,influence of different fibers and proportion on the mechanical properties of cementitious composites were discussed based on the compressive test,the flexural test and the direct tensile test.Research results show that organic fiber decrease the compressive strength of UHTCC,however,the flexural strength increases.According to the mechanic properties and the cost of materials comprehensive consideration,it is suggested that the optimal dosage of fiber is 2%;the most significant of tensile strain hardening is Japanese polyving akohol（PVA）fiber reinforced cementitious composites,the following is the domestic PVA fiber,and there is no strain hardening phenomenon in the domestic polypropylene（PP）fiber and polyethylene（PE）fiber under the direct tension.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第11期57-61,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51678011)
北京市属高等学校高层次人才引进与培养计划资助项目(CIT&TCD20150310)
关键词
超高韧性的水泥基复合材料
PP纤维
PE纤维
PVA纤维
力学性能
ultra high toughness cementitious composite
polypropylene （PP） fiber
polyethylene（PE） fiber
polyving akohol （PVA） fiber
mechanical property
