水泥稳定再生骨料混合料力学性能和抗冻性能研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (2): 774-780.

所属专题：道路材料

• 道路材料 • 上一篇

水泥稳定再生骨料混合料力学性能和抗冻性能研究

单社¹, 郭海贞², 魏定邦², 刘辉¹, 阮志琦¹, 任国斌²

1.甘肃省交通投资管理有限公司,兰州 730000;
2.甘肃省交通规划勘察设计院股份有限公司,兰州 730000

收稿日期:2023-07-26 修订日期:2023-09-21 出版日期:2024-02-15 发布日期:2024-02-05
通信作者: 郭海贞,工程师。E-mail:13705865857@qq.com
作者简介:单社(1980—),男,高级工程师。主要从事公路工程建设管理方面的研究。E-mail:28506381@qq.com
基金资助:
甘肃省交通运输厅科技项目(2023-04);2021年甘肃省科技重大专项(21ZD3GA002)

Mechanical Properties and Frost Resistance of Cement Stabilized Recycled Aggregate Mixture

SHAN She¹, GUO Haizhen², WEI Dingbang², LIU Hui¹, RUAN Zhiqi¹, REN Guobin²

1. Gansu Provincial Transportation Investment Management Co., Ltd., Lanzhou 730000, China;
2. Gansu Transportation Planning Survey and Design Institute Co., Ltd., Lanzhou 730000, China

Received:2023-07-26 Revised:2023-09-21 Online:2024-02-15 Published:2024-02-05

摘要/Abstract

摘要： 为促进再生骨料在半刚性基层中的应用,实现建筑垃圾在公路工程中的资源化利用,本文采用等质量置换法,系统分析了再生骨料掺量(质量分数)为0%、30%、50%、70%、100%时对无机混合料最大干密度、最佳含水率、无侧限抗压强度、抗冻性能的影响,并从微观角度解释了内在影响机理。结果表明:掺入再生骨料降低了无机混合料的最大干密度,增大了最佳含水率;再生骨料可以有效提高无机混合料的无侧限抗压强度和抗冻性能,当再生骨料掺量为70%时提升效果最佳,此时再生骨料无机混合料7、28 d无侧限抗压强度为4.6、6.8 MPa,28、90 d冻融循环后残留抗压强度比可达82.4%、85.5%。

关键词: 再生骨料, 无侧限抗压强度, 抗冻性能, 最大干密度, 最佳含水率

Abstract: In order to promote the application of recycled aggregate in semi rigid base layers and achieve the resource utilization of construction waste in highway engineering, this article uses equal mass replacement method to systematically analyze the effect of recycled aggregate content (mass fraction) at 0%, 30%, 50%, 70%, and 100% on maximum dry density, optimal moisture content, unconfined compressive strength, and frost resistance of inorganic mixtures, and explains its internal influencing mechanism from a microscopic perspective. The results show that the addition of recycled aggregate reduces the maximum dry density of inorganic mixtures and increases the optimal moisture content. Recycled aggregate can effectively improve the unconfined compressive strength and frost resistance of inorganic mixtures. The best effect is achieved when recycled aggregate content is 70%. At this moment, the unconfined compressive strength of recycled aggregate inorganic mixtures is 4.6 and 6.8 MPa after 7 and 28 d, and the residual compressive strength ratio after 28 and 90 d of freeze-thaw cycles can reach 82.4% and 85.5%.

Key words: recycled aggregate, unconfined compressive strength, frost resistance, maximum dry density, optimal moisture content

中图分类号:

U414

单社, 郭海贞, 魏定邦, 刘辉, 阮志琦, 任国斌. 水泥稳定再生骨料混合料力学性能和抗冻性能研究[J]. 硅酸盐通报, 2024, 43(2): 774-780.

SHAN She, GUO Haizhen, WEI Dingbang, LIU Hui, RUAN Zhiqi, REN Guobin. Mechanical Properties and Frost Resistance of Cement Stabilized Recycled Aggregate Mixture[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(2): 774-780.

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水泥稳定再生骨料混合料力学性能和抗冻性能研究

Mechanical Properties and Frost Resistance of Cement Stabilized Recycled Aggregate Mixture

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