Sustainable utilisation of calcium-rich industrial wastes in soil stabilisation: Potential use of calcium carbide residue

• Published in: Journal of environmental management Vol. 357; p. 120800
• Main Authors: Tang, Panpan, Javadi, Akbar A., Vinai, Raffaele
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2024
• Subjects: Calcium carbide residue; Conventional stabilisers; Environmental impact; Mechanical properties; Soil stabilisation; Mechanical properties; Calcium carbide residue; Environmental impact; Conventional stabilisers; Soil stabilisation
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2024.120800

Calcium carbide residue (CCR), a by-product of the acetylene industry, is generated at a rate of 136 million tonnes per year, posing significant environmental risks. This review examines the potential utilisation of CCR in soil stabilisation, focusing on its stabilisation mechanism, performance in improving mechanical properties, environmental safety, and sustainability. The aim is to identify future research directions for CCR-based stabilisation to promote its broader application, and to provide references for managing similar Ca-rich wastes. CCR-based materials demonstrate promising benefits in enhancing various soil properties, such as uniaxial strength, swelling properties, triaxial shear behaviour, compressibility, and dynamic responses, while also reducing the mobility of contaminants. Compared to conventional stabilisers, CCR-based materials exhibit comparable performance in soil improvement, environmental impact and safety, and economic feasibility. However, further research is required to delve deeper into stabilisation mechanisms, mechanical properties, and stability of contaminants for the soil treated with CCR-based materials under diverse conditions. •Calcium carbide residue (CCR) based materials effectively enhance soil's mechanical properties.•CCR and CCR-pozzolans may fail to resist sulphate attack and weathering cycles.•CCR based materials can effectively reduce the mobility of heavy metals.•CCR based materials have lower carbon emission and energy usage than traditional stabilisers.