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Uniaxial Compression Failure Behavior and Energy Evolution of Sandstone-Marble Waste Powder Concrete Composites
Xiang Huang1, Jiahao Cao1, Shuguang Zhang1
1Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin 541004, China.
Sensors (Basel, Switzerland)
|July 15, 2026
Summary
Interface roughness significantly impacts sandstone-concrete composite stability. Higher joint roughness coefficients (JRC) increase peak stress and elastic modulus, altering failure mechanisms from shear slip to tensile-dominated failure.
Area of Science:
- Geotechnical Engineering
- Materials Science
Background:
- Sandstone-concrete composites are vital for underground structures.
- Interface roughness is a critical factor for structural stability and safety.
Purpose of the Study:
- To investigate how interface roughness influences the failure behavior of sandstone-concrete composites.
- To analyze the mechanical response, energy evolution, and damage characteristics under varying joint roughness coefficients (JRC).
Main Methods:
- Fabrication of sandstone-concrete composite specimens with varying JRC (0, 7.84, 17.99, 20.79).
- Uniaxial compression tests utilizing acoustic emission (AE) and digital image correlation (DIC) for monitoring.
- Analysis of mechanical properties, energy dissipation, damage, and strain localization.
Main Results:
- Peak stress and elastic modulus increased with JRC, showing a 170.3% and 201.1% rise, respectively.
- Energy evolution shifted from progressive damage to a three-stage mechanism (friction, storage, release/dissipation) with increasing roughness.
- Higher JRC suppressed shear slip, promoted tensile strain localization, but excessive roughness led to stress concentration and instability.
Conclusions:
- Interface roughness is a key design parameter for sandstone-concrete composites.
- Optimizing JRC can enhance mechanical properties and control failure modes.
- Understanding roughness effects is crucial for ensuring the safety and stability of underground engineering projects.
Keywords:
acoustic emissiondigital image correlationenergy evolutionjoint roughness coefficientsandstone–marble waste powder concrete compositeuniaxial compressionMore Related Videos
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