再生混凝土骨料与红砂岩土接触面剪切特性研究

罗翔; 吴建奇

doi:10.3724/j.gyjzG23091213

再生混凝土骨料与红砂岩土接触面剪切特性研究

doi: 10.3724/j.gyjzG23091213

罗翔^1,2,
吴建奇^2, ,

1. 酒泉职业技术学院, 甘肃酒泉 735000;
2. 江西理工大学土木与测绘工程学院, 江西赣州 341000

基金项目:

国家自然科学基金项目(51768025)。

详细信息

作者简介:
罗翔,硕士,主要从事岩土工程相关领域的研究,1479146288@qq.com。

通讯作者:
吴建奇,博士,副教授,硕士生导师,wujq1980@jxust.edu.cn。

计量
- 文章访问数: 36
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- 被引次数: 0
出版历程
- 收稿日期: 2023-09-12
- 网络出版日期: 2025-10-24

Research on Shear Characteristics of the Interface Between Recycled Concrete Aggregate and Red Sandstone Soil

LUO Xiang^1,2,
WU Jianqi^{2
, ,}

1. Jiuquan Vocational and Technical College, Jiuquan 735000, China;
2. College of Civil and Surveying Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

摘要

摘要: 再生混凝土骨料作为建筑垃圾的破碎物,在可持续发展政策下具有广泛的应用潜力。以再生混凝土骨料和赣南地区典型红砂岩土为主要研究对象,通过室内大型直剪试验,研究再生混凝土骨料与红砂岩土在加筋条件下接触面的剪切特性。试验结果表明:孔径比越小,峰值剪应力和残余剪应力越大,且峰值剪应力出现的位置逐渐滞后,随着孔径比的减小,表观黏聚力和内摩擦角逐渐增大;对于红砂岩土含水率不超过12.7%(最佳含水率)的试样,峰值剪应力和残余剪应力随着含水率的增加逐渐减小,表观黏聚力和内摩擦角随着含水率的增大而逐渐减小;在不同孔径比和不同红砂岩土含水率两种试验条件下,峰值剪应力和残余剪应力均随着法向应力的增大而增大;引入Kalhaway本构方程,通过线性拟合和幂函数拟合推导出剪切刚度的表达式。
- 再生混凝土骨料 /
- 红砂岩土 /
- 孔径比 /
- 含水率 /
- 卡尔哈韦本构方程
Abstract: The vigorous promotion of construction waste resource utilization and disposal is a key requirement and trend under the sustainable development strategy. Recycled concrete aggregate, which is produced from crushed construction waste, has broad potential applications. This study investigated the shear characteristics of the interface between recycled concrete aggregate and typical red sandstone soil from the Gannan region under reinforced conditions through large-scale indoor direct shear tests. The results showed that as the aperture ratio decreased, both the peak shear stress and residual shear stresse increased, while the time lag to reach peak shear stress also increased gradually. Additionally, with decreasing aperture ratio, the apparent cohesion and internal friction angle increased gradually. For samples of red sandstone soil with a moisture content not exceeding 12.7% (the optimum moisture content), both the peak shear stress and residual shear stress gradually decreased as the moisture content increased. Similarly, the apparent cohesion and internal friction angle also decreased gradually with the increase of moisture content. Under different aperture ratios and moisture contents of red sandstone soil, both the peak shear stress and residual shear stress increased with higher vertical stress. The shear stiffness expression was derived through linear fitting and power function fitting, incorporating the Kalhaway constitutive equation.
- recycled concrete aggregate /
- red sandstone soil /
- aperture ratio /
- moisture content /
- Kalhaway constitutive equation

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参考文献(21)

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