【作者】 朱洪波； 马保国； 王信刚；

【Author】 ZHU Hongbo MA Baoguo WANG Xingnag (Key Lab for Silicate Materials Science and Engineering of Ministry of Education, WUT, Wuhan 30070, China)

【机构】 武汉理工大学硅酸盐材料工程教育部重点实验室；

【摘要】 <正>自密实混凝土又称免振捣或自流平混凝土,关于中、低强度级的配制技术已经取得许多研究成果。在实际应用中,高强、超高强混凝土由于钢筋设置密集,振捣不便,对自密实性的要求更加迫切。由于采用硅灰等超细胶结材、较高的胶结材总量和小于0.25的超低水胶比,所以高强、超高强自密实混凝土要解决需水比大和早期水化速率高造成的工作性恶化与大流动性以及高的流动性保持率等要求之间的矛盾,同时要解决收缩增大产生的更多还原

【Abstract】 When high-strength self-compacting concrete (SCC) is 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 is 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, is used to produce much high expand than commonly expend agent. The volume stability is improved, and the un-penetrability is advanced in evidence and finally. The effecting rules of WHU on workability, compressive strength, permeability and volume stability are investigated.更多还原