砖混粗骨料级配与含量对水泥稳定材料性能的影响

doi:10.16552/j.cnki.issn1001-1625.2025.0808

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (11): 4092-4102.DOI: 10.16552/j.cnki.issn1001-1625.2025.0808

砖混粗骨料级配与含量对水泥稳定材料性能的影响

陈恒武¹, 杜俊朋¹, 王洪泰¹, 曾思清^1,2, 杨东来³, 张同生¹, 韦江雄¹, 余其俊¹

1.华南理工大学材料科学与工程学院,广州 510641;
2.广东省公路建设有限公司,广州 510699;
3.保利长大工程有限公司,广州 510620

收稿日期:2025-08-08 修订日期:2025-09-15 出版日期:2025-11-15 发布日期:2025-12-04
通信作者: 张同生,博士,研究员。E-mail:mstszhang@scut.edu.cn
作者简介:陈恒武(2000—),男,硕士研究生。主要从事建筑废弃物再利用方面的研究。E-mail:1326820907@qq.com
基金资助:
广州市重点研发项目(2023B03J1280)

Influences of Brick-Concrete Coarse Aggregate Gradation and Content on Properties of Cement Stabilized Materials

CHEN Hengwu¹, DU Junpeng¹, WANG Hongtai¹, ZENG Siqing^1,2, YANG Donglai³, ZHANG Tongsheng¹, WEI Jiangxiong¹, YU Qijun¹

1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;
2. Guangdong Provincial Highway Construction Group Co., Ltd., Guangzhou 510699, China;
3. Poly Changda Engineering Co., Ltd., Guangzhou 510620, China

Received:2025-08-08 Revised:2025-09-15 Published:2025-11-15 Online:2025-12-04

摘要/Abstract

摘要： 提高建筑废弃物资源化利用率对降低环境负荷和推动绿色建材发展具有重要意义。本文通过优化砖混粗骨料级配与含量提升水泥稳定材料综合性能,研究砖混粗骨料单粒径级配(S)、双粒径级配(B)、三粒径级配(T)和相对体积分数(34.7%~68.4%)对水泥稳定材料力学性能、体积稳定性和水稳性能的影响。结果表明,采用三粒径级配(T)砖混粗骨料制备水泥稳定材料7 d无侧限抗压强度均稳定在4.0 MPa以上,31 d干缩系数低至31.0×10^-6/%。砖混粗骨料相对体积分数为54.7%时,水泥稳定材料综合性能最佳,7 d无侧限抗压强度为4.1 MPa,28 d水稳系数为78.7%。优化骨料级配能够增强粗骨料间机械嵌合作用,改善水泥稳定材料力学性能;砖混粗骨料相对体积分数决定了水泥稳定材料骨架结构,骨架密实型水泥稳定材料综合性能最佳,这为优化再生水泥稳定材料配合比设计提供了理论依据与技术支撑。

关键词: 砖混粗骨料, 水泥稳定材料, 力学性能, 体积稳定性, 水稳性能, 骨架结构

Abstract: Improving the resource utilization of construction waste is of great significance for reducing environmental load and promoting the development of green building materials. In this paper, the comprehensive performance of cement stabilized materials was improved by optimizing the gradation and content of brick-concrete coarse aggregate. The effects of single-size gradation (S), binary-size gradation (B), triple-size gradation (T) and relative volume fraction (34.7%~68.4%) of brick-concrete coarse aggregate on the mechanical properties, volume stability and water stability of cement stabilized materials were studied. The results show that the 7 d unconfined compressive strength of cement stabilized materials prepared with triple-size gradation (T) brick-concrete coarse aggregate consistently is above 4.0 MPa, and the dry shrinkage coefficient at 31 d is as low as 31.0×10^-6/%. When the relative volume fraction of brick-concrete coarse aggregate is 54.7%, the cement stabilized materials exhibit the best overall performance, with a 7 d unconfined compressive strength of 4.1 MPa and a 28 d water stability coefficient of 78.7%. Optimizing the aggregate gradation enhances the mechanical interlocking between neighboring coarse aggregates, thereby improving the mechanical properties of the cement stabilized materials.The relative volume fraction of brick-concrete coarse aggregate determines the skeleton structure of the cement stabilized materials, and comprehensive performance of cement stabilized materials with skeleton-dense structure is the best. These findings provide theoretical basis and technical guidance for the mix proportion design optimization of recycled cement stabilized materials.

Key words: brick-concrete coarse aggregate, cement stabilized material, mechanical property, volume stability, water stability, skeleton structure

中图分类号:

TU528.37

陈恒武, 杜俊朋, 王洪泰, 曾思清, 杨东来, 张同生, 韦江雄, 余其俊. 砖混粗骨料级配与含量对水泥稳定材料性能的影响[J]. 硅酸盐通报, 2025, 44(11): 4092-4102.

CHEN Hengwu, DU Junpeng, WANG Hongtai, ZENG Siqing, YANG Donglai, ZHANG Tongsheng, WEI Jiangxiong, YU Qijun. Influences of Brick-Concrete Coarse Aggregate Gradation and Content on Properties of Cement Stabilized Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(11): 4092-4102.

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砖混粗骨料级配与含量对水泥稳定材料性能的影响

Influences of Brick-Concrete Coarse Aggregate Gradation and Content on Properties of Cement Stabilized Materials

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