摘要
通过18组试件的试验,对钢-聚乙烯醇(PVA)混杂纤维混凝土的流动性、抗压强度、破坏形式及钢纤维与PVA纤维的协同作用进行了研究.结果表明,混杂纤维总掺量(体积分数,下同)为1.75%时,混凝土的流动性会随着PVA纤维掺量的提高而降低,且在PVA纤维掺量大于0.25%时下降加快;1.50%钢纤维和0.25%PVA纤维的纤维组合会发生正协同作用,使混凝土抗压强度达到最大;纤维组合为1.25%钢纤维和0.50%PVA纤维时混凝土抗折强度最大;PVA纤维的掺入有利于混凝土受压破坏的多缝开展.
The fluidity,compressive strength,flexural strength,failure mode and the synergistic effect of steel-PVA fiber reinforced concrete were studied by 18 sets of specimens.The results show that when the total fiber volume fraction is 1.75%,the fluidity of concrete decreases with the increase of PVA fiber volume fraction,and decreases when PVA fiber volume fraction is more than 0.25%,and when the PVA fiber volume fraction is more than 0.25%,the rate of decline becomes higher.When the total fiber volume fraction is 1.75%,the positive synergies occur in the fiber combination of 1.50% steel fiber and 0.25% PVA fiber,compressive strength to the maximum;the flexural strength reaches the maximum when the fiber combination is 1.25% steel fiber and 0.50% PVA fiber.The incorporation of PVA fibers is favorable to the multi-crack cracking.
作者
于婧
翟天文
梁兴文
孙骁骥
YU Jing;ZHAI Tianwen;LIANG Xingwen;SUN Xiaoji(College of Civil Engineering,Xi an University of Architecture ＆ Technology,Xi an 710055,China;Xi an Changqing Technology Engineering Co.,Ltd.,Xi an 710018,China)
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2018年第3期402-407,共6页
Journal of Building Materials
基金
陕西省教育厅专项科研计划项目(16JK1449)
西安建筑科技大学人才科技基金项目(RC1233)
关键词
钢-聚乙烯醇混杂纤维
协同效应
流动性
抗压强度
抗折强度
韧性
steel-PVA hybrid fiber concrete
synergies effects
fluidity
compressive strength
flexural strength
ductility
