废弃混凝土作骨料及掺合料对混凝土性能的影响

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发布时间：2020-01-06 00:00:00

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废弃混凝土作骨料及掺合料对混凝土性能的影响

Effect of waste concrete as aggregates and admixtures on performance of concrete

2023年第11期

废弃混凝土；再生骨料；再生微粉；性能；微观结构

Waste concrete; Recycled aggregate; Recycled powder; Performance; Microstructure

2023年第11期

10.19761/j.1000-4637.2023.11.098.05

宁波市科技计划项目-科技创新2025重大专项项目（创新挑战赛2022T003）；四川省自然科学基金项目（2022NSFSC1135）。

毛宁1，2，金超3，刘铁3，吴艳萍3，黄金桥3，蒋俊1，2，*，卢忠远1，张玉蓉4

1.西南科技大学环境友好能源材料国家重点实验室，四川绵阳 621010；2.西南科技大学材料与化学学院，四川绵阳 621010；3.宁波建工工程集团有限公司，浙江宁波 315040；4.西南科技大学土木工程与建筑学院，四川绵阳 621010

毛宁1，2，金超3，刘铁3，吴艳萍3，黄金桥3，蒋俊1，2，*，卢忠远1，张玉蓉4

毛宁,金超,刘铁,等.废弃混凝土作骨料及掺合料对混凝土性能的影响[J].混凝土与水泥制品,2023(11):98-102.

MAO N,JIN C,LIU T,et al.Effect of waste concrete as aggregates and admixtures on performance of concrete[J].China Concrete and Cement Products,2023(11):98-102.

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摘要：将废弃混凝土制成再生骨料（再生砂和再生石）和再生微粉，研究了再生骨料等体积取代0~100%的天然骨料和再生微粉等质量取代0~20%的水泥对混凝土性能的影响，并进行了微观分析。结果表明：再生骨料的掺入降低了混凝土的工作性，而再生微粉对混凝土工作性的影响不大；掺入适量再生骨料可在一定程度上提高混凝土的抗压强度；仅用再生石取代部分天然石时，再生石的最佳掺量为60%；仅用再生砂取代部分机制砂时，再生砂的最佳掺量为80%；随着再生微粉掺量的增加，试件的抗压强度先增大后减小，最佳掺量为5%。 Abstract: The waste concrete was made into recycled aggregates(recycled sand and recycled stone) and recycled powder, and the effects of replacing 0~100% natural aggregates with recycled aggregates and replacing 0~20% cement with recycled powder on the performance of concrete were studied, and the microscopic analysis was conducted. The results show that the addition of recycled aggregates reduces the workability of concrete, while the influence of recycled powder on the workability of concrete is not significant. Adding an appropriate content of recycled aggregates can improve the compressive strength of concrete to a certain extent. When only using recycled stone to replace some natural stone, the optimal content of recycled stone is 60%. When only using recycled sand to replace some manufactured sand, the optimal content of recycled sand is 80%. As the content of recycled powder increases, the compressive strength of the specimen first increases and then decreases, and the optimal content of recycled powder is 5%.

英文名 : Effect of waste concrete as aggregates and admixtures on performance of concrete

刊期 : 2023年第11期

关键词 : 废弃混凝土；再生骨料；再生微粉；性能；微观结构

Key words : Waste concrete; Recycled aggregate; Recycled powder; Performance; Microstructure

刊期 : 2023年第11期

DOI : 10.19761/j.1000-4637.2023.11.098.05

文章编号 :

基金项目 : 宁波市科技计划项目-科技创新2025重大专项项目（创新挑战赛2022T003）；四川省自然科学基金项目（2022NSFSC1135）。

作者 : 毛宁1，2，金超3，刘铁3，吴艳萍3，黄金桥3，蒋俊1，2，*，卢忠远1，张玉蓉4

单位 : 1.西南科技大学环境友好能源材料国家重点实验室，四川绵阳 621010；2.西南科技大学材料与化学学院，四川绵阳 621010；3.宁波建工工程集团有限公司，浙江宁波 315040；4.西南科技大学土木工程与建筑学院，四川绵阳 621010

毛宁1，2，金超3，刘铁3，吴艳萍3，黄金桥3，蒋俊1，2，*，卢忠远1，张玉蓉4

毛宁,金超,刘铁,等.废弃混凝土作骨料及掺合料对混凝土性能的影响[J].混凝土与水泥制品,2023(11):98-102.

MAO N,JIN C,LIU T,et al.Effect of waste concrete as aggregates and admixtures on performance of concrete[J].China Concrete and Cement Products,2023(11):98-102.

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摘要

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结论

参考文献

引用本文

Abstract: The waste concrete was made into recycled aggregates(recycled sand and recycled stone) and recycled powder, and the effects of replacing 0~100% natural aggregates with recycled aggregates and replacing 0~20% cement with recycled powder on the performance of concrete were studied, and the microscopic analysis was conducted. The results show that the addition of recycled aggregates reduces the workability of concrete, while the influence of recycled powder on the workability of concrete is not significant. Adding an appropriate content of recycled aggregates can improve the compressive strength of concrete to a certain extent. When only using recycled stone to replace some natural stone, the optimal content of recycled stone is 60%. When only using recycled sand to replace some manufactured sand, the optimal content of recycled sand is 80%. As the content of recycled powder increases, the compressive strength of the specimen first increases and then decreases, and the optimal content of recycled powder is 5%.

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废弃混凝土作骨料及掺合料对混凝土性能的影响

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