国家速滑馆看台板再生骨料混凝土力学及耐久性能试验研究  

Experimental Research on Mechanical Properties and Durability Performances of Recycled Aggregate Concrete Stand-Plates of National Speed Skating Oval

作　　者：苏振华 李少华[1] 蔡亚宁[1] 陈利敏 彭李洋 赵伟 SU Zhenhua;LI Shaohua;CAI Yaning;CHEN Limin;PENG Liyang;ZHAO Wei(Beijing Urban Construction Group Co.,Ltd.,Beijing 100088,China;Beijing National Speed Skating Oval Operation Co.,Ltd.,Beijing 100192,China)

机构地区：[1]北京城建集团有限责任公司,北京100088 [2]北京国家速滑馆经营有限责任公司,北京100192

出　　处：《工业建筑》2023年第7期209-216,共8页Industrial Construction

基　　金：国家重点研发计划项目(2019YFF0301500)。

摘　　要：国家速滑馆建筑体量较大,为秉承“可持续发展,节约办赛”和“碳达峰、碳中和”的理念,充分利用桩头回收的大量废旧混凝土,整合资源、优化工艺,生成再生骨料,用以生产看台板。对等强度配合比设计的再生骨料混凝土(RAC)和普通混凝土(NAC)分别进行力学性能、抗碳化性能、抗冻融性能三方面对比试验,结果表明:RAC的力学表现和抗碳化性能均优于NAC,但抗冻融性能略差于NAC。此外,基于CT扫描技术进行了微观机理分析,结果表明:NAC试件和RAC试件的力学性能细观层面的破坏模式一致,抗冻融试件的CT扫描显示RAC试件质量损失会随循环次数的增加而增大,比NAC质量损失快。The National Speed Skating Oval is a large building.In order to implement the concept of sustainable development and economy in the Winter Olympics,the project of the National Speed Skating Oval has a good use of a large amount of demolished concrete of the pile head to produce recycled aggregate which is used in the precast stand-plates.In the light of the durability requirements of recycled aggregate concrete(RAC),recycled aggregate concrete and fair-faced normal aggregate concrete(NAC)with the same strength were designed according to a specific concrete ratio and were tested in the experiments of mechanics,carbonation and freeze-thaw cycles.In addition,the microscopic mechanism analysis was conducted based on CT scanning technology.The results showed that the failure modes of NAC specimens and RAC specimens were the same at the microscopic level,and the CT scanning showed that RAC specimens would lead to the increase of mass loss with the increase of the number of cycles,which fairly faster than NAC.

关 键 词：国家速滑馆 再生骨料 清水混凝土 预制看台板 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]