| 不同取代率再生混凝土抗压强度尺寸效应研究 |
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| 引用本文： | 张丽,余振鹏,沈丽,孙雪,谢兴华.不同取代率再生混凝土抗压强度尺寸效应研究[J].新型建筑材料,2019(3):18-21,87. |
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| 作者姓名： | 张丽 余振鹏 沈丽 孙雪 谢兴华 |
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| 作者单位： | 南昌大学共青学院;东南大学交通学院;金陵科技学院建筑工程学院;南京水利科学院水工水力学研究所 |
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| 基金项目： | 国家重点研发计划项目(2016YFC0401704);国家自然科学基金重点项目(51539006) |
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| 摘 要： | 采用5种不同取代率(0、25%、50%、75%和100%)和3种不同边长(70 mm、100 mm和150 mm)再生混凝土立方体试件,研究不同取代率再生混凝土抗压强度受尺寸效应影响的规律。结果表明:相同取代率再生混凝土受压破坏机理均相同,不受尺寸效应和再生料取代率影响;不同取代率再生混凝土抗压强度存在明显的尺寸效应,尺寸越大其抗压强度越低,再生骨料取代率越高尺寸效应影响越低。建立了不同取代率再生混凝土尺寸效应计算公式。
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| 关 键 词： | 再生混凝土 不同取代率 尺寸效应 抗压强度 |
Study on size effect of compressive strength of recycled concrete with different substitution rates |
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| ZHANG Li,YU Zhenpeng,SHEN Li,SUN Xue,XIE Xinghua.Study on size effect of compressive strength of recycled concrete with different substitution rates[J].New Building Materials,2019(3):18-21,87. |
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| Authors: | ZHANG Li YU Zhenpeng SHEN Li SUN Xue XIE Xinghua |
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| Affiliation: | (Gongqing College of Nanchang University,Jiujiang 332020,China;School of Transportation,Southeast University,Nanjing 211102,China;Architectural Engineering Institute,Jinling Institute of Technology,Nanjing 211169,China;Hydraulic Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China) |
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| Abstract: | In order to explore the size effect of compressive strength of recycled concrete with different substitution rates,recycled concrete cube specimens with five different replacement rates(0,25%,50%,75% and 100%) and three kinds of edge length (70 mm,100 mm and 150 mm) were tested. The results show that the compression failure mechanism of the recycled concrete with the same substitution rate is the same,it is not affected by the size effect and the regenerative ratio of reclaimed material;The compressive strength of recycled concrete with different substitution rate is obviously influenced by the size effect. The larger the size,the lower the compressive strength. The higher the substitution rate of recycled aggregate,the lower the effect of size effect. A formula for calculating the size effect law of recycled concrete with different substitution rates is established. |
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| Keywords: | recycled concretedifferent substitution rate size effect compressive strength |
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