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

LUO Xiang; WU Jianqi

doi:10.3724/j.gyjzG23091213

Volume 55 Issue 8

Aug. 2025

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LUO Xiang, WU Jianqi. Research on Shear Characteristics of the Interface Between Recycled Concrete Aggregate and Red Sandstone Soil[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 250-257. doi: 10.3724/j.gyjzG23091213

Citation:

LUO Xiang, WU Jianqi. Research on Shear Characteristics of the Interface Between Recycled Concrete Aggregate and Red Sandstone Soil[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 250-257. doi: 10.3724/j.gyjzG23091213

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

doi: 10.3724/j.gyjzG23091213

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

Received Date: 2023-09-12
Available Online: 2025-10-24

Abstract

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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References(21)

References

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