摘要
国家速滑馆是2022冬奥会的标志性场馆,其柔性索网区域单元式屋面系统的防水是要解决的关键问题。首先通过相关案例调研对常用的高分子防水卷材,包括内增强型热塑性聚烯烃(TPO)、匀质型三元乙丙橡胶(EPDM)防水卷材及相关配套材料压敏自硫化泛水进行了力学性能试验和微观破坏机理分析。试验结果表明:EPDM相对于TPO有更好的尺寸稳定性,而且EPDM压敏自硫化泛水材料随着硫化时间的增加,由最初的塑性逐渐表现出具有成品EPDM卷材的弹性性能,满足了速滑馆屋面对防水卷材的各项要求,最终选用EPDM卷材搭配自硫化泛水材料进行速滑馆屋面防水,并对自硫化泛水材料的硫化研究提出了建议。
National Speed Skating Oval is the landmark of the 2022 Winter Olympic Games,and the waterproofing of the unitary roofing system for the flexible cable net area is a key issue which needs to be solved.Firstly,based on the relevant cases,the mechanical properties and micro failure mechanism of common polymer waterproofing membrane were analyzed,including internal enhanced TPO,homogeneous EPDM and EPDM pressure-sensitive self-curing flashing.The test results showed that EPDM had better dimensional stability than TPO,and with the increase of curing time,the performance of EPDM pressure-sensitive self-curing flashing material gradually started to show the elastic performance of finished EPDM membrane from its initial plasticity,completely met the requirements of waterproofing membrane.Finally,EPDM membrane with self-curing flashing was selected for the waterproofing of National Speed Skating Oval,and some suggestions on the vulcanization research of the self-curing flashing materials were put forward.
作者
张少杰
苏振华
罗惠平
李少华
冯鹏
王世彬
张道博
ZHANG Shaojie;SU Zhenhua;LUO Huiping;LI Shaohua;FENG Peng;WANG Shibin;ZHANG Daobo(Tsinghua University,Beijing 100084,China;Beijing Urban Construction Group Co.,Ltd.,Beijing 100088,China)
出处
《工业建筑》
CSCD
北大核心
2022年第4期171-178,共8页
Industrial Construction
基金
国家重点研发计划项目(2019YFF0301500)。
关键词
防水卷材
EPDM
自硫化泛水
力学性能
waterproofing membrane
EPDM
self-curing flashing
mechanical properties
