Long-Term Damage and Deterioration Law of Concrete under Corrosive Environment in Qarhan Salt Lake
SUN Jingnan
YU Hongfa
WU Chengyou
TAN Yongshan
MA Haiyan
Abstract：Aiming at the corrosion problem of concrete in saline soil area of Qarhan Salt Lake in Qinghai,by measuring the dynamic elastic modulus and compressive strength of high performance concrete(HPC)exposed for 8 years,the relationship between relative dynamic elastic modulus,compressive corrosion coefficient and 28 d compressive strength was studied,and the binary correlation analysis of HPC's brine resistance was made by combining water-binder ratio and slag content.Finally,the correlation between carbonation depth and 28 d compressive strength was analyzed.The results show that the corrosion resistance of HPC decreases with the decrease of 28 d compressive strength in brine environments.The critical value of relative dynamic elastic modulus for HPC corrosion damage is 0.80,contrary to the traditional theoretical threshold of 0.60.When the water-binder ratio is lower than 0.33,the slag content is more than 26%,and the carbonation depth is controlled below 20 mm,HPC achieves high brine corrosion resistance.
Keywords：concretesaline soil corrosionrelative dynamic elastic moduluscompressive corrosion coefficientcarbonation depth
Publication Date：2025-10-30
Online Publishing Date：2025-11-10(First online date of this platform, not the publication date of the document)
Pages：6( 980-985 )