Evolution Mechanism of Partition Pore Structure in Semi-immersed Concrete under Sulphate Attack
QIAO Chunlei
ZHOU Sheng
WENG Weisu
LIU Zhongyang
Abstract：Through partition treatment,the porosity,pore size distribution,ion content distribution and microscopic products were studied to reveal the evolution mechanism of pore structure in the immersion zone,crystallization zone and drying zone of semi-immersed concrete under sulphate attack.The results show that the immersion zone is affected by chemical erosion products such as ettringite,with large expansion force,enhanced pore connectivity,and the most serious damage.The crystallization zone is mainly affected by the physical crystallization expansion of Na2SO4 and water evaporation,with more micropores and weaker connectivity.The drying zone has the most micropores and the weakest connectivity.
Keywords：partition time-varying lawporositypore structuresemi-immersed
Publication Date：2025-11-30
Online Publishing Date：2025-12-09(First online date of this platform, not the publication date of the document)
Pages：9( 1146-1154 )