水分含量对PVA-SHCC断裂能及应变硬化的影响  

Effect of moisture content on PVA-SHCC fracture energy and strain hardening

作　　者：任昭君[1] 孙志伟[1] 苏卿[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《工程建设》2008年第4期9-12,共4页Engineering Construction

摘　　要：为研究PVA-SHCC在不同水分含量下的断裂能及应变硬化,对全干燥、半干燥(RH=75%重新润湿)和水浸泡PVA-SHCC进行了三点弯曲与四点弯曲试验。实验表明:PVA-SHCC弯曲韧性受温度影响显著;随水分含量的增加开裂应力减小,变形增大;干燥后的PVA-ECC断裂能随着水分含量的增加逐渐增大。In order to study the fracture energy and strain hardening of PVA-SHCC in different moisture content, three-point bending test and four-point bending test for total dry, semi-dry（ RH = 75% moisten again）and water soaked PVA-SHCC were made. The test showed that： PVA-SHCC bend ductility is remarkably influenced by temperature, the cracking stress reduces and deformation grows with the increase of moisture content, and the PVA-SHCC fracture energy after drying grows gradually with the increase of moisture content.

关 键 词：PVA-SHCC 表面能 断裂能 应变硬化 水分含量 

分 类 号：TU502[建筑科学—建筑技术科学]