Study on Physical-Mechanical Properties and Energy Evolution Laws of Yellow Sandstone at Different Temperatures
LUO Ji'an
LI Chenghuang
Abstract：To study the physical-mechanical properties and energy evolution laws of yellow sandstone under high-temperature conditions,physical tests and uniaxial compression tests were performed on yellow sandstone treated at different temperatures.The results indicate that:as the temperature rises from 25 ℃ to 700 ℃,the volume expansion rate,mass loss rate,and density reduction rate of yellow sandstone all increase with temperature,with their rates of change increasing more significantly when the temperature exceeds 300 ℃;with increasing temperature,the compaction stage of the stress-strain curve is gradually prolonged,and the peak strain increases gradually;the peak stress and elastic modulus decrease gradually with temperature treatment below 300 ℃,but increase significantly at 500 ℃;the total energy evolution process can be divided into four stages,corresponding to the stress-strain curve,which characterizes the failure process of yellow sandstone.
Keywords：yellow sandstonehigh temperaturephysical propertiesmechanical propertiesenergy evolution
Publication Date：2025-07-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 78-83 )