Sustainable regenerated binding materials (RBM) utilizing industrial solid wastes for soil and aggregate stabilization. (1st December 2020)

• Record Type: Journal Article
• Authors: Zhang, Xuanrui; Li, Wengui; Tang, Zhuo; Wang, Xiaofeng; Sheng, Daichao
• Is Part Of: Journal of cleaner production. Volume 275(2020)
• Publication Date: 2020-12-01
• Subjects: Regenerated binding materials (RBM) -- Industrial wastes -- Soil stabilization -- Aggregate stabilization -- Mechanical strength -- Microstructure; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2020.122991
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: This study presents an experimental investigation on a sustainable regenerated binding material (RBM), which is derived from several industrial solid wastes. Initially, the hydration process, mechanical behaviors, and microstructural characteristics of the RBM were investigated. Subsequently, the feasibility of RBM for the stabilization of macadam, expansive soil, and weathered sand was evaluated. The results reveal that in comparison with the ordinary Portland cement (OPC), the RBM exhibits a slightly faster hydration rate at the initial stage and comparable mechanical performance. For the stabilized macadam, the one stabilized by the RBM exhibits better unconfined compressive strength, scouring resistance and freeze-thaw resistance than the counterpart stabilized by OPC. Furthermore, the RBM can significantly improve the performance index of the expansive soil and weathered sand, and this enhancement is more significant as the RBM content increasing. Additionally, the RBM has been successfully applied in practical engineering, manifesting the promising application potential of the RBM. Overall, the excellent performance of RBM as an alternative stabilizer of the subgrade soil and aggregates can promote the application of the RBM low-carbon pavement construction in the future. Highlights: In comparison with OPC, the hydration rate of RBM is faster at the initial stage. Mechanical strength of RBM is comparable to that of OPC at the curing ages of 3 and 28 days. UCS, scouring resistance, and freeze-thaw resistance increase with the stabilizing agent content. RBM can significantly improve the performance index of the expansive soil and weathered sand. RBM stabilizes expansive soil and weather sand as a stabilizing agent in practical projects.