摘要
目的对混杂纤维工程用水泥基复合材料进行配合比优化设计,得到综合性能优越的混杂纤维ECC材料(HFRECC)。方法采用正交试验研究水胶比、PVA纤维、碳酸钙晶须(CW)以及改性PP纤维(MPP)体积分数等因素对流动度、立方抗压强度、抗折强度以及劈裂抗拉强度的影响,利用组合加权灰色关联理论确定各性能的权重,实现HFRECC配合比的优化设计。结果PVA纤维体积分数为1.0%,碳酸钙晶须体积分数为0.8%,改性PP纤维体积分数为0.6%时,HFRECC的综合性能最佳。抗压强度提高了23%,抗折强度提高了42.4%,劈裂抗拉强度提高了34.4%,折压比提高了17.8%,流动度提升了28.6%。结论组合加权-灰色关联分析方法可实现多目标性能需求的混杂纤维ECC配合比优化设计,适量PVA纤维、CW及MPP纤维的混杂在一定程度上能提升HFRECC的性能。
The mixture ratio of the multi-fiber synergy modified ECC was optimized based on orthogonal design and the combined weighted-grey relational theory,and then the hybrid fiber reinforced engineered cementitious composites(HFRECC)with superior comprehensive performance was obtained.The orthogonal test method was used to study the effects of water-to-binder ratio,content of PVA,calcium carbonate whisker(CW)and modified PP(MPP)on HFRECC performance,including the fluidity,cube compressive strength,flexural strength and splitting tensile strength.Based on weight of each performance determined by the combined weighted assignment,the optimum mixing proportion of HFRECC with the best comprehensive performance was obtained.The optimum mixing proportion with the superior comprehensive performance of HFRECC is that,the water-binder ratio of 0.31,1.0%PVA fiber(volume fraction),0.8%CW and 0.6%MPP.Compared with the control group,the cube compressive strength increased by 23%,the flexural strength increased by 42.4%,the split tensile strength increased by 34.4%,the compression ratio increased by 17.8%,and the fluidity increased by 28.6%.The combined weighted-grey relational can successfully optimize mix proportion of HFRECC to satisfy multi-purpose performance requirement.The mixing of PVA,CW and MPP can improve the propertie of HFRECC to some extent.
作者
高英力
裴甘鹏
徐艺珅
冷政
GAO Yingli;PEI Ganpeng;XU Yishen;LEN Zheng(School of Traffic and Transportation Engineering,Changsha University of Science and Technology,Changsha,China,410114;Foshan Highway&Bridge Construction Co.Ltd.,Foshan,China,528000;China West Construction Hunan Group Co.Ltd.,Changsha,China,410004)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第2期262-269,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51978080)
国家自然科学基金委员会与中国民用航空局联合项目(U1833127)
湖南省自然科学基金项目(2018JJ4016)
湖南省教育厅科学研究重点项目(18A129)。
关键词
ECC材料
混杂纤维
组合加权
灰色关联理论
engineering cementitious composites
hybrid fibers
combined weighted
grey relational theory
作者简介
高英力(1977-),男,教授,博士,主要从事新型建筑材料和高性能功能路面材料方面研究。
