| 摘要: |
| 对不同再生粗骨料取代率和水灰比下9组混凝土的力学性能及耐久性能进行了测试；基于测试结果及分析，提出了长度界面参数、体积界面参数和广义界面参数的概念，并比较分析了3个界面参数与再生粗骨料取代率、水灰比、力学性能及耐久性能的关系.结果表明：再生粗骨料混凝土的力学性能及耐久性能与再生粗骨料取代率、水灰比紧密相关；广义界面参数可反映界面体积和新砂浆水灰比对混凝土性能的影响，较好揭示了再生粗骨料混凝土性能的劣化机理. |
| 关键词: 再生粗骨料混凝土 再生粗骨料取代率 水灰比 力学性能 耐久性能 界面参数 |
| DOI：10.3969/j.issn.1007-9629.2022.07.012 |
| 分类号:TU528.1 |
| 基金项目:浙江省“高层次人才特殊支持计划”科技创新领军人才项目（2021R52035） |
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| Interface Parameter of Recycled Coarse Aggregate Concrete |
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PENG Ligang1, ZHAO Yuxi1, ZENG Weilai1,2, LIU Chengbin1
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1.College of Civil Engineering and Architecture， Zhejiang University， Hangzhou 310058， China;2.China State Construction International Holdings Limited， Shenzhen 518000， China
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| Abstract: |
| The mechanical and durability properties of nine groups of concrete， with various recycled coarse aggregate（RCA） replacement rates and water-to-cement ratios， were examined. Based on the experimental results and analysis， the length， volume and generalized interface parameters were determined； the correlation between three interface parameters and the RCA replacement rate， the water-to-cement ratio， the mechanical and durability properties were established. The results show that the mechanical and durability properties of RAC are closely related to the RCA replacement rate and the water-to-cement ratio； the generalized interface parameter reflects the effects of interface volume and water-to-cement ratio of new mortar on concrete properties， which reveals the degradation mechanism of RAC properties. |
| Key words: recycled coarse aggregate concrete recycled coarse aggregate replacement ratio water-to-cement ratio mechanical property durability interface parameter |
