Shear characteristics of the interface between recycled concrete aggregate and geogrids

WU Jianqi; LUO Xiang; WANG Jun; LI Min; CHEN Teng

doi:10.11835/j.issn.2096-6717.2023.099

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Shear characteristics of the interface between recycled concrete aggregate and geogrids

Civil Engineering | 更新时间：2026-02-18

- Shear characteristics of the interface between recycled concrete aggregate and geogrids
- Journal of Civil and Environmental Engineering Vol. 48, Issue 1, Pages: 118-126(2026)
- 作者机构：
  
  1.江西理工大学土木与测绘工程学院，江西赣州 341000
  2.温州大学建筑工程学院，浙江温州 325035
- 作者简介：
  
  WU Jianqi (1980- ), associate professor, main research interest: geotechnical engineering, E-mail: wujq1980@jxust.edu.cn.
- 基金信息：
  
  National Natural Science Foundation of China(51768025)
- DOI：10.11835/j.issn.2096-6717.2023.099
  CLC： TU528.041
- Received：20 June 2023，
  
  Published：25 February 2026
- 稿件说明：
移动端阅览
吴建奇,罗翔,王军等.再生混凝土骨料与土工格栅的界面剪切特性[J].土木与环境工程学报,2026,48(01):118-126.

WU Jianqi,LUO Xiang,WANG Jun,et al.Shear characteristics of the interface between recycled concrete aggregate and geogrids[J].Journal of Civil and Environmental Engineering,2026,48(01):118-126.
吴建奇,罗翔,王军等.再生混凝土骨料与土工格栅的界面剪切特性[J].土木与环境工程学报,2026,48(01):118-126. DOI： 10.11835/j.issn.2096-6717.2023.099.

WU Jianqi,LUO Xiang,WANG Jun,et al.Shear characteristics of the interface between recycled concrete aggregate and geogrids[J].Journal of Civil and Environmental Engineering,2026,48(01):118-126. DOI： 10.11835/j.issn.2096-6717.2023.099.

摘要

随着经济的持续发展和城市规模的不断扩大，建筑垃圾的资源化和再生利用势在必行，作为建筑垃圾筛分破碎后的产物，再生混凝土骨料有着广阔的应用前景。以4种不同粒径范围的再生混凝土骨料为研究对象，引入孔径比概念，通过室内大型直剪试验，系统研究了3种不同竖向应力和4种不同剪切速率下再生混凝土骨料与双向聚丙烯土工格栅的界面剪切特性。结果表明：孔径比越小，剪切界面的峰值剪应力和残余剪应力越大，且峰值剪应力出现位置越滞后；随着孔径比的减小，峰值似黏聚力和残余似黏聚力逐渐增大，峰值内摩擦角和残余内摩擦角也逐渐增大；土工格栅的加入可有效地减少界面剪胀现象；引入卡尔哈韦本构方程，通过线性拟合与对数拟合推导出剪切刚度表达式，进而得到应力状态

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下对应的剪切刚度值。

Abstract

In the context of ongoing economic development and urban expansion

there is an urgent need to promote the resource utilization and recycling of construction waste. As a crushed material obtained from the screening of construction waste

recycled concrete aggregate has broad application prospects. This study focuses on four distinct particle size ranges of recycled concrete aggregate. By introducing the concept of aperture ratio

the shear characteristics of the interface between the recycled concrete aggregate and biaxial polypropylene geogrids are investigated through large-scale direct shear tests under three different vertical stresses and four different shear rates. The findings demonstrate that as the aperture ratio diminishes

the peak shear stress and residual shear stress at the shear interface increased

and the peak shear stress occurred at a later stage. Conversely

as the aperture ratio decreases

the peak apparent cohesion and residual apparent cohesion undergo a gradual increase

and the peak internal friction angle and residual internal friction angle also increase. The addition of geogrids effectively reduces the occurrence of shear dilation at the interface. By introducing the Kalhaway constitutive equation

the expression for shear stiffness is derived through linear and logarithmic fitting

and the shea

r stiffness corresponding to the stress state (

) is thereby obtained.

关键词

Keywords

references

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