Effect of Fly Ash and Activator on Performance of Steam-Cured Concrete

摘要：

In precast concrete elements manufacturing,steam-cured concrete incorporating 30％ fly ash encountered the problem of a too low demoulding compressive strength.To resolve it,this paper developed a new steam-cured concrete (AFSC) incorporating fly ash and a chemical activator.Experiments were conducted to investigate the mechanical properties of AFSC.The corresponding mechanism was also discussed by testing the microstructure of concrete.Results indicate that the demoulding compressive strength of AFSC can meet production requirements,and compressive and flexure strength of AFSC at later ages increase well.Compared with that of ordinary steam-cured concrete,AFSC has a higher tensile strength,and the capability of AFSC to resist cracks is enhanced remarkably.At an early age,addition of the chemical activator can distinctly accelerate the extent of hydration of the fly ash cement systems,and thus the microstructure of concrete becomes denser.

关键词： Fly ash Activator Steam curing

作者: He Zhimin Xie Youjun Long Guangcheng Liu Junzhe

作者单位: School of Civil Engineering and Architecture,Central South University,Changsha,410075,China Departme School of Civil Engineering and Architecture,Central South University,Changsha,410075,China Department of Civil Engineering,Ningbo University,Zhejiang,315211,China

会议类型: 国际会议

会议名称: 2010 International Conference of Environment Materials and Environment Management(2010年环境材料与环境管理国际学术会议 EMEM 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 1013-1016

在线出版日期: 2010-07-24（万方平台首次上网日期，不代表论文的发表时间）