Study on durability of high strength concrete wall of deep shaft with high salinity water stratum
HU Kun
YAO Zhishu
ZHU Hongwei
WANG Rui
DING Zongchuang
Abstract：In order to prevent the shaft wall of deep vertical shaft crossing high salinity water stratum from being corroded and affecting safe operation,the durability of high strength concrete of shaft wall under sulfate immersion was studied.The compressive strength,mass loss and relative dynamic elastic modulus of three kinds of concrete with different water-binder ratio and two kinds of concrete with anti-corrosion treatment eroded in sulfate environment for 180 days were compared.The results show that the compressive strength,mass and relative dynamic elastic modulus of concrete specimens under different erosion concentrations show a trend of slow growth and then accelerated decrease with age,and the change trend of relative dynamic elastic modulus and compressive strength was highly similar.The smaller the water-binder ratio was,the better the compactness of the concrete was,the transmission of sulfate ions in the concrete was inhibited,the less the erosion of the concrete was,and the better the durability of the shaft wall was.The concrete with a water-binder ratio of 0.26 had the best resistance to sulfate attack during the entire erosion cycle.Under the premise of constant water-binder ratio,the addition of preservatives had a certain effect on improving the sulfate resistance of concrete,while the anti-corrosion measures using sulfate-resistant cement had poor applicability under the condition of high concentration sulfate erosion.The results of this study could provide reference for the preparation of shaft lining concrete in deep vertical shafts crossing high salinity water strata in Northwest China.
Keywords：high salinity waterwall concretesulfate erosionmechanical propertiesdurability test
Publication Date：2023-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 51-57 )