Influence of Crumb Rubber on the Drying Shrinkage and Plastic Shrinkage Cracking of AASM

摘要：

　　The alkali-activated slag mortar (AASM) has disadvantages of high shrinkage and therefore low crack resistance.In this paper,water quenched raw slag was used to replace sand for making AASM,and effects of crumb rubber on the drying shrinkage and plastic shrinkage cracking of AASM were investigated.The experimental results showed that the incorporation of crumb rubber into AASM reduced the drying shrinkage of AASM and improves the plastic shrinkage cracking resistance.Compared with the referenced mortar,after the 90-day drying the shrinkage of AASM containing 3% rubber decreased by 28.5% and crack index decreased by 64%.However,the addition of higher dosage of crumb rubber may bring negative effect on the flexural strength and the compressive strength of AASM.It is therefore proposed that the optimum rubber content be around 3% in order to balance both the mechanical performance and the plastic and the drying shrinkage.

关键词： Alkali-activated slag Crumb rubber Mortar Drying shrinkage Plastic shrinkage cracking

作者: Tao Lia Yamei Zhang zhenggui Zhu

作者单位: School of Materials Science and Engineering, Jiangsu Key Laboratory of Construction Materials,Southeast University, Nanjing 211189, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 161-165

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）