Expansive Behaviors of Self-stressing Concrete under Different Restraining Conditions  

作　　者：常旭 

机构地区：[1]College of Civil Engineering, Henan Polytechnic University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2011年第4期780-785,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the NSFC (No.50578027);the Key Subject Foundation of Henan Province (No.504906);the Doctor Foundation of Henan Polytechnic University (No.B2009-2)

摘　　要：The expansive behaviors of the expensive concrete under different restraining conditions were systemically studied. The experimental results indicate that expansive deformation obviously increases before 10 days and tends to be constant after 25 days regardless of the restraining conditions. The mixture ratio of expansive cement and restraining conditions are the main factors affecting expansive deformation. Self-stress can be obtained when the expansive deformation is restrained. The higher self-stress could be obtained when the expensive concrete is restrained by steel tube. For specimens under steel tube restraining, the wall thickness and the length of the steel tube have important influence on self-stress. Both the radial self-stress and axial self-stress in concrete core increase when wall thickness or length of the steel tube increases.The expansive behaviors of the expensive concrete under different restraining conditions were systemically studied. The experimental results indicate that expansive deformation obviously increases before 10 days and tends to be constant after 25 days regardless of the restraining conditions. The mixture ratio of expansive cement and restraining conditions are the main factors affecting expansive deformation. Self-stress can be obtained when the expansive deformation is restrained. The higher self-stress could be obtained when the expensive concrete is restrained by steel tube. For specimens under steel tube restraining, the wall thickness and the length of the steel tube have important influence on self-stress. Both the radial self-stress and axial self-stress in concrete core increase when wall thickness or length of the steel tube increases.

关 键 词：SELF-STRESS expansive concrete restraining condition 

分 类 号：TU528[建筑科学—建筑技术科学]