Effect of stress level on the frost resistance and uniaxial compressive properties of desert sand concrete

Jiang, Yanjie and Liu, Haotian and Liu, Haifeng and Che, Jialing and Liu, Yijiang and Yang, Weiwu and Doh, Shu Ing (2024) Effect of stress level on the frost resistance and uniaxial compressive properties of desert sand concrete. Journal of Material in Civil Engineering, 36 (12). pp. 1-16. ISSN 1943-5533. (Published)

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Abstract

Rapid freeze-thaw (F-T) tests were conducted to study the frost resistance of desert sand concrete (DSC) at different stress levels (SL), desert sand replacement rate (DSRR) and the number of F-T cycles. The impact of the SL, DSRR, and number of F-T cycles on the mass loss rate, ultrasonic wave velocity, and stress-strain curve of DSC was investigated through uniaxial compression tests. Scanning electron microscope (SEM) was used to examine the microstructure of DSC. The constitutive relationship was established considering the influence of the SL and number of F-T cycles. The results indicated that the frost resistance and uniaxial compressive mechanical properties of DSC could be effectively enhanced when desert sand was added at 40%. The peak strain initially decreased and then increased as the DSRR increased. In contrast, the peak stress first increased and reached a maximum value as the DSRR increasing to 40%, followed by a gradual decrease. The F-T cycles gradually deteriorated the macroscopic properties of DSC. The proposed constitutive model of DSC was established by combining the two classical models as the ascending and descending sections, respectively. The model prediction results matched well with the experimental results, which can provide a theoretical basis for the engineering application of DSC under F-T cycles and loading environments.

Item Type:	Article
Uncontrolled Keywords:	Desert sand concrete (DSC); Desert sand replacement rate (DSRR); Stress level (SL); Freeze-thaw (F-T) cycles; Uniaxial compressive experiment; Stress-strain curve
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Faculty/Division:	Faculty of Civil Engineering Technology
Depositing User:	Dr. Doh Shu Ing
Date Deposited:	25 Sep 2024 07:18
Last Modified:	25 Sep 2024 07:18
URI:	http://umpir.ump.edu.my/id/eprint/42663
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