膨胀剂对次轻混凝土收缩的影响  

Shrinkage of semi-lightweight concrete with expanding agent

作　　者：陈平[1] 王涛[2] 丁庆军[2] 汪漠[1] 

机构地区：[1]桂林工学院有色金属材料及其加工新技术省部共建教育部重点实验室,广西桂林541004 [2]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《桂林工学院学报》2006年第1期90-92,共3页Journal of Guilin University of Technology

基　　金：国家"863"计划资助项目(2002AA335080)

摘　　要：研究了在不同养护制度下膨胀剂对次轻混凝土收缩的影响:膨胀剂能够降低次轻混凝土的收缩,随着膨胀剂掺量的增大,次轻混凝土的收缩减小.掺膨胀剂的次轻混凝土在湿养护阶段产生膨胀,其膨胀率随着湿养护时间的延长而增大,养护到21 d以后其膨胀趋势变小.在随后的干燥养护中,掺膨胀剂的次轻混凝土的收缩随着养护时间的延长而增大.The influence of expanding agent on the shrinkage of semi-lightweight concrete is studied under different curing condition. The results show that the shrinkage rate of semi-lightweight concrete can be reduced along with the increase of proportion of expanding agent. The semi-lightweight concrete with expanding agent will expand during humid curing condition. The expanding rate will increase with the time of curing, while the expanding trend will decrease after 21d. In the subsequent dry curing condition, the shrinkage of semi-lightweight concrete with expanding agent will increase with the time.

关 键 词：膨胀剂 次轻混凝土 收缩 养护制度 

分 类 号：TU528.2[建筑科学—建筑技术科学]