Geopolymer mortars as sustainable repair material: A comprehensive review

Ghasan Fahim Huseien, Jahangir Mirza, Mohammad Ismail, S.K. Ghoshal and Ahmed Abdulameer Hussein

Renewable and Sustainable Energy Reviews, 2017, vol. 80, issue C, 54-74

Abstract: Environmentally sustainable repair materials with reduced carbon footprint have been in great demand by the construction industry worldwide. Gradual deterioration of concrete containing large quantities of Portland cement is inevitable, and requires repair or replacement. Numerous repair materials including cementitious mortars, polymer-modified cementitious mortars, resinous mortars, etc. have been utilized to rectify the problem. Cement-free geopolymer mortars prepared from waste materials with high content of silicate aluminum and alkaline activator solution are emerging as prominent sustainable repair materials. Geopolymer binders are preferred because they generate 70–80% less carbon dioxide with remarkably lesser greenhouse gas emissions than ordinary Portland cement. These new binders are highly sought-after due to their enhanced durability performance, sustainability, and environmental affability. This paper provides a comprehensive overview of state-of-the-art research on sustainable geopolymers for repairing deteriorated and damaged concrete structures as well as restoring their integrity. Present challenges and future prospects of various geopolymer mortars as repair materials are emphasized.

Keywords: Sustainability; Alkaline solution; Binder; Waste materials; Fresh and hardened state properties; Durability; Microstructure; Economic feasibility (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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DOI: 10.1016/j.rser.2017.05.076

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