Research on the Performance of Desert Sand Concrete Under Dry-Wet Cycles with Sulfate Erosion

QIN Dongyang; LIU Haifeng; ZHU Lichen; CHE Jialing; YANG Weiwu

doi:10.13204/j.gyjzG23053001

Volume 53 Issue 11

Nov. 2023

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QIN Dongyang, LIU Haifeng, ZHU Lichen, CHE Jialing, YANG Weiwu. Research on the Performance of Desert Sand Concrete Under Dry-Wet Cycles with Sulfate Erosion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 207-213,220. doi: 10.13204/j.gyjzG23053001

Citation:

QIN Dongyang, LIU Haifeng, ZHU Lichen, CHE Jialing, YANG Weiwu. Research on the Performance of Desert Sand Concrete Under Dry-Wet Cycles with Sulfate Erosion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(11): 207-213,220. doi: 10.13204/j.gyjzG23053001

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Research on the Performance of Desert Sand Concrete Under Dry-Wet Cycles with Sulfate Erosion

doi: 10.13204/j.gyjzG23053001

School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China

Received Date: 2023-05-30

Abstract

Abstract

In order to study the performance of desert sand concrete after sulfate attack, the mechanical properties of sulfate attacked desert sand concrete under the action of wet-dry cycles were tested. The mass loss rate, compressive corrosion resistance coefficient and dynamic elastic modulus were used to symbol the mechanical properties deterioration of desert sand concrete under the action of sulfate erosion and wet-dry cycles. Experimental results showed that with the increase of the number of dry-wet cycles, the mass loss rate of desert sand concrete decreased firstly and then increased. The compressive corrosion resistance coefficient and relative dynamic modulus of elasticity increased firstly and then decreased. When the number of wet-dry cycles was equal to 60, the mass loss rate of desert sand concrete reached the minimum, and the compressive corrosion resistance coefficient and relative dynamic modulus of elasticity arrived at maximum. The higher the sulfate solution concentration, the greater the decrease in compressive corrosion resistance coefficient and relative dynamic modulus. The compressive corrosion resistance coefficient and relative dynamic modulus of desert sand concrete with the desert sand replacement ratio of 40% were higher than that of ordinary concrete. Dynamic elastic modulus was used to define damage variable. The relative peak stress and peak strain were exponentially related to the damage variable, the correlation coefficients of which were all above 0.93.
- desert sand concrete,
- sulphate erosion,
- wet-dry cycle,
- stress-strain curve,
- damage

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References(26)

References

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