Effects of Nano-CaCO3 on the Compressive Strength and Microstructure of High Strength Concrete in Different Curing Temperature

摘要：

　　In this paper,effects of nano-CaCO3 on compressive strength and Microstructure of high strength concrete in standard curing temperature(21 ± 1℃) and low curing temperature(6.5 ± 1℃)was studied.In order to improve the early strength of the concrete in low temperature,the early strength agent calcium nitrite was added into.Test results indicated that 0.5% dosage of nano-CaCO3 could inhibit the effect of calcium nitrite as early strength agent,but 1% and 2% dosage of nano-CaCO3 could improve the strength of the concrete by 13% and 18% in standard curing temperature and by 17% and 14% in low curing temperature at the age of 3days.According to the XRD spectrum,with the dosage up to 1% to 2%,nano-CaCO3 can change the orientation index significantly,leading to the improvement of strength of concrete both in standard curing temperature and low curing temperature.

关键词： concrete low temperature curing nano-CaCO3 compressive strength XRD spectrum

作者: Qinglei Xu Tao Meng Miaozhou Huang

作者单位: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou310058, China

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 126-131

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）