高强自密实混凝土既要解决高强度要求采用的超低水胶比、高强胶结材料或者高的胶结材用量等配制技术与大流动性之间的突出矛盾,又要解决容易出现的收缩增大问题,采用具有与水泥收缩规律针对性更强的新型多元复合膨胀剂WHU,能够产生比一般膨胀剂持久的后期膨胀,使最终的体积稳定性得到明显改善,抗渗性提高,研究了WHU对工作性、强度、渗透性和体积稳定性的影响规律。

The Influence of Expend Agent WHU on Shrinkage and Permeability of Self-compacting ConcreteZHU Hong-bo~(1,2),MA Bao-guo~1,LI Xiang-guo~1 (1.Key Laborary for Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China;2.School of Materials Science and Engineering,Tongji University,Shanghai 200092,China)When high-strength self-compacting concrete(SCC) was confected,extrude conflicts,which between high fluidity and low W/C,high intensity cement,or more cement etc.have to be adopted,should be resolved.Another problem of which shrinkage was easy to increases should be resolved as well as in the same time.A new kind of expending agent WHU,made of multi minerals,having more pertinency against shrinking rule of cement,was used to produce much higher expand than commonly expend agent.The volume stability was improved,and the un-penetrability was advanced in evidence,and finally the effecting rules of WHU on workability,compressive strength,permeability and volume stability were investigated.C80 self-compacting Concrete;expend agent WHU;expend rule;wear