Abstract
Lightweight Clay Aggregate (LWCA) is a kind of highly porous granular particle which is often used as lightweight backfilling geomaterials. However, the easy breakage of LWCA particle plays a negative role in its geotechnical application. This study focuses on the internal structure and compressive behavior of single LWCA particle using experiments and numerical simulations. The uniaxial compressive strength and loading stiffness of the LWCA particle is attributed to its special porous internal structure. The results could enrich our understanding in particle crushing.
Highlights
Lightweight Clay Aggregate (LWCA) is a kind of loose and porous lightweight granular material, which is made of shale, clay or fly ash by sintering at high temperature or adding gelling agent
In terms of LWCA particle, Calderia & Neves [10] used a 500 mm diameter consolidator to measure compression behavior of LWCA assembly with particle diameter between 10 and 20 mm and it is found that LWCA assembly presents high plasticity bahavior with an unloading modulus more than 10 times greater than the loading modulus
The internal structure of LWCA particle is quite different from that of sand particles studied in previous researches
Summary
Lightweight Clay Aggregate (LWCA) is a kind of loose and porous lightweight granular material, which is made of shale, clay or fly ash by sintering at high temperature or adding gelling agent. LWCA has the characteristics of loose internal structure. The highly porous structure of the particle makes it easy to crush under load. In terms of LWCA particle, Calderia & Neves [10] used a 500 mm diameter consolidator to measure compression behavior of LWCA assembly with particle diameter between 10 and 20 mm and it is found that LWCA assembly presents high plasticity bahavior with an unloading modulus more than 10 times greater than the loading modulus. The internal structure of LWCA particle is quite different from that of sand particles studied in previous researches. If such a difference would significantly change the particle crushing behavior deserves detailed study. This study focuses on the internal structure and compressive behavior of single LWCA particle using experiments and numerical simulations
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