The use of treated desert sand in sustainable concrete: A mechanical and microstructure study

Hamada, Hussein M.; Abed, Farid; Al-Sadoon, Zaid A.; Elnassar, Zeinah; Hassan, Arhum

doi:10.1016/j.jobe.2023.107843

Cited by 11 publications

(1 citation statement)

References 36 publications

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“…Due to the scarcity of natural resources in recent years, a large number of researchers have examined the use of aeolian sand (AS) in concrete globally. Their research primarily focuses on AS as a raw material for concrete, with the expectation that it will eventually serve as the primary fine aggregate in concrete and construction [16][17][18][19]. There are two primary results on AS replacement: (1) there exists an ideal ratio for AS replacement [20][21][22], and (2) the use of AS alone has adverse impacts on the characteristics of concrete and construction [15,17,23].…”

Section: Introductionmentioning

confidence: 99%

Impermeability and Durability of Self-Compacting Concrete Prepared with Aeolian Sand and Recycled Coarse Aggregate

Zheng,

Liu,

Han

et al. 2023

Materials

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Self-compacting concrete has seen extensive application in both engineering and construction. In order to save building resources, aeolian sand—recycled coarse aggregate self-compacting concrete (ARSCC) is created by partially substituting recycled coarse aggregates (RCA) and aeolian sand (AS) for natural coarse aggregates. For ten groups with different mechanical and durable properties, this study examined the effects of sulfate erosion, chloride penetration resistance, and related impermeability, as well as AS replacement ratios of 20%, 40%, and 60% and RCA replacement ratios of 25%, 50%, and 75% in ARSCC and a control group (A0-R0). According to the study’s findings, after sulfate attack, the highest relative dynamic elastic modulus and corrosion resistance factor were obtained with the 20% AS replacement ratio and 50% RCA replacement ratio (A20-R50). The highest impermeability grade and lowest electric flux were obtained with the 20% AS replacement ratio and 25% RCA replacement ratio (A20-R25). X-ray diffraction (XRD) and mercury intrusion porosimetry (MIP) revealed that the addition of aeolian sand and recycled coarse aggregates improved the pore structure of the SCC and increased the densification of the self-compacting concrete, particularly following sulfate attack. This study highlights the importance of recycled aggregates and aeolian sand in engineering applications and the sustainable growth of the concrete industry, both of which support resource conservation and environmental protection.

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