铁道科学与工程学报2016，Vol.13Issue(4)：654-661,8.
复掺外加剂体系对低水胶比混凝土强度及耐久性影响试验研究
Experience study on impact of strength and durability of compound admixture system of low water-binder ratio concrete
摘要
Abstract
The orthogonal experiment of strength and durability of one low water-binder ratio(mW/mB =0.3) concrete was done in the circumstance of different dosage of compound admixture system(expansive agent,water reducing agent,air-entraining agent).The influences of workability of concrete,concrete strength and durabil-ity changed with different dosage were analyzed.The durability of the concrete was assessed based on the electric flux method and the rapid chloride ion migration coefficient method (RCM method),and the optimal dosage of different admixtures was obtained.Results show that the change regulation of electric flux and the rapid chloride ion migration coefficient is familiar.The durability of change both increases with the increase of dosage of admix-ture variation,good first and then bad,under the mixture ratio,the dosage of J =1 .5%,Y =0.4%,P =8%has the best performance on the permeability in concrete;Three kinds of admixture have a promoting role on the strength growth of concrete,including water reducing agent is most evident influence on the early and the late strength of concrete;With the dosage increase of air-entraining agent,the strength decreases and then increa-ses;The dosage of expansive agent has no fixed effect on concrete strength.The incorporation of mineral admix-tures is advantageous to the durability of the concrete.Given the selection of mixture ratio and ground material limitations,this study only provide reference for subsequent similar studies.关键词
复掺外加剂/最优掺量/强度及耐久性Key words
compound admixtures/the optimal dosage/strength and durability分类
建筑与水利引用本文复制引用
杜迎东,王起才,张戎令,惠兵,郑建锋,刘少龙..复掺外加剂体系对低水胶比混凝土强度及耐久性影响试验研究[J].铁道科学与工程学报,2016,13(4):654-661,8.基金项目
国家自然科学基金资助项目(51268032) （51268032）
长江学者和创新团队发展计划资助项目(IRT1139) （IRT1139）
铁道部科技研究开发计划项目(2012G011 -A) （2012G011 -A）
