The law of damage and deterioration of modified coal gangue concrete under the coupling action of erosion damage and high temperature
WEN Yongqin
WANG Lutong
JIANG Tingting
LU Jinshan
LI Jia
Abstract：The damage and deterioration laws of modified coal gangue concrete damaged by freeze-thaw erosion and sulfate erosion before and after 200,400,600 and 800 ℃ were studied respectively,and the mass loss rate,splitting tensile strength loss rate and compressive strength loss rate were discussed and analyzed.The results show that the addition of steel fiber and mineral admixture can significantly improve the mechanical properties of coal gangue concrete under the coupling action of erosion damage and high temperature,and the composite effect of fly ash,mineral powder and steel fiber is the best.The erosion damage-high temperature coupled deterioration model with compressive strength loss rate as damage variable was established.The model can better characterize the damage and deterioration law of modified coal gangue concrete under freeze-thaw erosion-high temperature coupling and sulfate erosion-high temperature coupling.
Keywords：erosion damage-high temperature couplingsteel fibermineral admixturemodified coal gangue concreteevolution model
Publication Date：2023-11-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 47-52 )