Influence of Different Varieties of Water Reducing Agent on the Early Cracking of Concrete
Early cracking performance of concrete incorporating five different varieties of water reduce agent was tested by flat-panel test method and concrete surface cracks were observed within 24hours after pouring of concrete.The results showed that crack resistance of concrete incorporating polycarboxylate-based water reducer (PC) was the best,the anti-cracking grade of concrete was Grade Ⅰ.Followed by those concrete incorporating resin water reducing agent,melamine (SM),naphthalene-based water reducer and aliphatic water reducer,the anti-cracking grade of concrete were all Grade Ⅲ.Sodium lignosulfonate had greater impact on the early cracking resistance of concrete,initial cracking time earlier and the number of cracks per unit area of concrete greater within 24h.The anti-cracking grade of concrete with it was Grade Ⅳ.
water reducing agent concrete cracking flat-panel test method limiting shrinkage
Jingyun Han Xuyan Song Ruyuan Xu
College of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011 Research Institute of Suzhou Concrete Cement Product,Suzhou 215004
国际会议
沈阳
英文
594-597
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）