Utilization of coal gangue sand in structural concrete as fine aggregate towards sustainable production

Zhang, Tong; Zhu, Qingru; Liu, Haiqing; Gao, Shan

doi:10.1016/j.conbuildmat.2024.135264

Cited by 8 publications

(1 citation statement)

References 40 publications

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“…In the modelling of concrete, 53 is selected as the dilation angle, 0.1 is selected as the eccentricity, the ratio f bo / f c is selected as 1.16, K c is 0.66667, and 0.0005 is the viscosity parameter [ 47 ].…”

Section: Finite Element Model and Experimental Verificationmentioning

confidence: 99%

Axial Compressive Behaviours of Coal Gangue Concrete-Filled Circular Steel Tubular Stub Columns after Chloride Salt Corrosion

Zhang,

Wang,

Zheng

et al. 2024

Materials

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The axial compressive behaviours of coal gangue concrete-filled steel tube (GCFST) columns after chloride salt corrosion were investigated numerically. Numerical modelling was conducted through the static analysis method by finite element (FE) analysis. The failure mechanism, residual strength, and axial load–displacement curves were validated against tests of the coal gangue aggregate concrete-filled steel tube (GCFST) columns at room and natural aggregate concrete-filled steel tube (NCFST) columns after salt corrosion circumstance. According to the analysis on the stress distribution of the steel tube, the stress value of the steel tube decreased as the corrosion rate increased at the same characteristic point. A parametric analysis was carried out to determine the effect of crucial variation on residual strength. It indicated that material strength, the steel ratio, and the corrosion rate made a profound impact on the residual strength from the FE. The residual strength of the columns exposed to chloride salt was in negative correlation with the corrosion rate. The impact on the residual strength of the column was little, obvious by the replacement rate of the coal gangue. A simplified design formula for predicting the ultimate strength of GCFST columns after chloride salt corrosion exposure was proposed.

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Section: Finite Element Model and Experimental Verificationmentioning

confidence: 99%