| 高温与持续荷载的复合作用对防水卷材拉伸性能的影响 |
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| 引用本文： | 余春春,李铭.高温与持续荷载的复合作用对防水卷材拉伸性能的影响[J].丽水学院学报,2012,34(5):78-80. |
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| 作者姓名： | 余春春 李铭 |
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| 作者单位： | 丽水学院工学院,浙江丽水,323000 |
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| 摘 要： | 以防水层卷材为研究对象，对70℃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实验考察和分析。结果表明：（1）在70℃高温条件下，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，卷材的断裂伸长率降低超过70％，平均拉伸强度上升了71．8％。（2）在70℃高温条件下，持续时间在1～7d范围内，持续时间对PVC防水卷材的断裂伸长率和拉伸强度影响不明显。
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| 关 键 词： | 初始伸长率 PVC防水卷材 持续时间 平均断裂伸长率 |
The Combined Impact of High temperature and Sustained Load on Tension Behavior of Waterproofing Rolls |
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| YU Chunchun
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LI Ming.The Combined Impact of High temperature and Sustained Load on Tension Behavior of Waterproofing Rolls[J].Journal of Lishui University,2012,34(5):78-80. |
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| Authors: | YU Chunchun LI Ming |
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| Institution: | YU Chunchun;LI Ming (School of Engineering,Lishui University,Lishui 323000,Zhejiang) |
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| Abstract: | A simulation experiment was conducted on PVC waterproofing rolls,aiming at finding out the change of the tensile property of the material under sustained load at the temperature of 70 ℃,and the result was then assessed.It is indicated that:1) at the high temperature of 70 ℃,the greater the initial elongation,the greater the impact of the sustained load on the tensile property of the material.For instance,at the initial elongation of 57.4%,the elongation at break decreased more than 70%,and the average tensile strength increased 71.8%;2) when exposed to the high temperature of 70 ℃ for one to seven days,the duration of time had little impact on the elongation at break and the tensile strength of the material. |
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| Keywords: | initial elongation PVC waterproofing rolls time duration average elongation at break |
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