Preparation and Properties of Alkali-activated Waste Concrete Cementitious Material

摘要：

The technical route and preparation method of alkaliactivated waste concrete cementitious material (AWCCM) were proposed in this paper to realize the high-efficiently recycling and re-utilizing waste concrete. The recycling waste concrete powder (R) was preparated by separating, grinding and sieving the waste concrete. The compound binding, materials of R and metakaolinite (MK) was activated by modified water glass (soluble sodium silicate) to prepare the AWCCM. XRD, IR and compressive strength tests were used to study the composition, hydration behavior and mechanism of this cementitious material. Experimental results showed that, AWCCM possess high compressive strength, which is more than 50MPa when the mixing amount of R is 50％. The alkali-activated reaction products of AWCCM are mainly geopolymer, C-S-H and a spot of silicone gel.

关键词： waste concrete metakaolinite alkali-activated cementitious material

作者: W. Yang J. Wu Y.J.He L.N. Lu Q.J.Ding

作者单位: Key Laboratory for Silicate Materials Science and Engineering of Education Ministry,Wuhan University Key Laboratory for Silicate Materials Science and Engineering of Education Ministry, Wuhan Universit Key Laboratory for Silicate Materials Science and Engineering of Education Ministry, Wuhan Universit School of Science, Wuhan University of Technology, Wuhan, 430070, China Key Laboratory for Silicate Materials Science and Engineering of Education Ministry, Wuhan Universit

会议类型: 国际会议

会议名称: The 7th International Symposium on Cement & Concrete(ISCC2010)、The 11th International Conference on Advance in Concrete Technology and Sustainable Development(第七届水泥与混凝土国际会议暨第11届混凝土技术可持续发展国际会议)

会议地点: 济南

会议语种:英文

页码: 397-401

在线出版日期: 2010-05-09（万方平台首次上网日期，不代表论文的发表时间）