The investigation on targeted micro-surface treatment methods for waste tires recycling in cementitious construction materials

Document Type

Article

Publication Date

8-10-2024

Abstract

Defects in the interfacial transition zone (ITZ) between recycled tire rubber and cement matrix obstacle to the large-scale application of sustainable rubberized cementitious materials. This paper proposed and evaluated different targeted treatment methods for micro-surface properties enhancement of rubber aggregate by the Polyvinyl Alcohol (PVA), Polyethylene Glycol-200 (PEG), and Hydroxypropyl methylcellulose (HY) polymer solutions through copolymerization and drafting processes. The optimum modification condition was determined through the FT-IR analysis, contact angle, and surface free energy of treated rubber aggregates and the micro-surface morphology and element distribution were analyzed by using ESEM and EDX, respectively. The flexural strength and pore size distribution of steel fiber-reinforced rubberized mortar with relatively high replacing volumes (20%, 40%, and 60%) were evaluated to validate the targeted micro-surface modification efficiency. The surface microstructure and hydrophilic properties of rubber aggregate were significantly improved and the mechanism for enhancing the interface adhesion between rubber and cement matrix was revealed.

Publication Title

Journal of Cleaner Production

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