持续荷载对PVC防水卷材拉伸性能的影响  

Influence of sustained load on tensile property of PVC waterproof coiled material

作　　者：余春春[1] 杨杨[1] 许四法[1] 蔡其茅[1] 吴伟松[1] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310032

出　　处：《新型建筑材料》2009年第5期70-73,共4页New Building Materials

摘　　要：以卷材防水层为研究对象,对20℃条件下受持续荷载作用后PVC防水卷材拉伸性能的变化进行了试验考察和分析。结果表明,20℃条件下,初始伸长率越大,持续荷载对PVC防水卷材拉伸性能的影响越大。初始伸长率为57.4%时,卷材的最大负荷减小超过10%,断裂伸长率降低大于40%。超过1 d后,持续时间对PVC防水卷材拉伸性能的影响不明显。Taking PVC waterproof coiled material as subject to be investigated experimental study and analysis are made on the change of tensile property of waterproof coiled material under sustained load at the. temperature of 20 ℃. The results showed that：The larger the initial elongation rate,the greater the influence of sustained load on tensile property of PVC waterproof coiled material at the temperature of 20 ℃. When the initial elongation rate is 57.4%, the peak load of coiled material decreases more than 10%,and the rupture elongation decreases more than 40%. The time duration has little influence on tensile property of PVC waterproof coiled material after i day.

关 键 词：PVC防水卷材 初始伸长率 持续时间 断裂伸长率 

分 类 号：TU573[建筑科学—建筑技术科学]