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| 再生卵石混凝土剪切力学性能试验研究 |
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陈宇良1,2,3,4，张绍松1，叶培欢1,2,3，李洪1,3，姜锐1
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1.广西科技大学 土木建筑工程学院，广西 柳州 545006;2.广西科技大学 广西装配结构安全防控工程研究中心，广西 柳州 545006;3.广西科技大学 柳州市绿色先进土木工程材料应用重点实验室，广西 柳州 545006;4.广西科技大学 广西高校防灾减灾与预应力技术重点实验室，广西 柳州 545006
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| 摘要: |
| 基于再生卵石混凝土直剪试验，研究了再生卵石骨料取代率和试件尺寸对再生卵石混凝土剪切力学性能的影响.结果表明：与天然卵石混凝土相比，再生卵石混凝土的抗剪强度有较大提升，再生卵石骨料取代率为50%时抗剪强度提升最大，提高幅度最大为47%；峰值位移随着再生卵石骨料取代率的增大而增大，最大提高了115%；再生卵石骨料取代率和试件尺寸对混凝土剪胀性能影响较小；最后，给出了尺寸换算系数，建立了再生卵石混凝土抗剪强度尺寸效应律公式，计算值和实测值吻合良好. |
| 关键词: 再生卵石 再生混凝土 直剪性能 尺寸效应 |
| DOI：10.3969/j.issn.1007-9629.2023.05.002 |
| 分类号:TU528.01 |
| 基金项目:中国博士后科学基金资助项目（2021M693854）；广西自然科学基金资助项目（2019GXNSFBA245030）；广西科技大学博士基金项目（校科博18Z09） |
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| Experimental Study on Shear Mechanical Properties of Recycled Pebble Aggregate Concrete |
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CHEN Yuliang1,2,3,4, ZHANG Shaosong1, YE Peihuan1,2,3, LI Hong1,3, JIANG Rui1
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1.School of Civil Engineering and Architecture， Guangxi University of Science and Technology， Liuzhou 545006， China;2.Guangxi Engineering Research Center for Safety Prevention and Control of Assembly Structure， Guangxi University of Science and Technology， Liuzhou 545006， China;3.Liuzhou Key Laboratory of Green Advanced Civil Engineering Materials Application， Guangxi University of Science and Technology， Liuzhou 545006， China;4.Key Laboratory of Disaster Prevention & Mitigation and Prestress Technology of Guangxi Colleges and Universities， Guangxi University of Science and Technology， Liuzhou 545006， China
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| Abstract: |
| Based on the direct shear test of recycled pebble aggregate concrete， the effects of recycled pebble aggregate replacement rate and specimen size on shear mechanical properties of recycled pebble aggregate concrete were studied. The results show that compared with natural pebble aggregate concrete， the shear strength of recycled pebble aggregate concrete is greatly improved. With recycled pebble aggregate replacement rate of 50 %， the shear strength is increased by 47 %. The peak displacement increases with the increase of recycled pebble aggregate replacement rate， and the maximum increment is 115 %. The replacement rate of recycled pebble aggregate and the size of the specimen have little effect on the dilatancy performance of concrete. Finally， the size conversion coefficient is given， and the size effect law formula of shear strength of recycled pebble aggregate concrete is established. The calculated values are in good agreement with the measured values. |
| Key words: recycled pebble aggregate recycled aggregate concrete direct shear performance size effect |
