A review on geopolymer in potential coating application: Materials, preparation and basic properties. (November 2020)

• Record Type: Journal Article
• Authors: Jiang, Chenhui; Wang, Aiying; Bao, Xufan; Ni, Tongyuan; Ling, Jin
• Is Part Of: Journal of building engineering. Volume 32(2021)
• Publication Date: 2020-11
• Subjects: Geopolymer -- Coatings -- Civil engineering -- Sustainability -- Solid wastes -- Surface protection -- Infrastructures -- Properties -- Performance -- Applications; Building -- Periodicals; 690.05
• DOI: 10.1016/j.jobe.2020.101734
• Languages: English
• ISSNs: 2352-7102

Abstract

Abstract: Environmentally friendly and sustainable protective coating materials with improved performance have been in great demand by civil engineering sector. This article presents a review on raw materials, mixture preparation and basic properties of geopolymer-based materials in terms of sealing and protecting surfaces of civil structures as well as restoring their integrity. Geopolymer-based protective coatings (GPCs) prepared from industrial by-products and solid wastes consisting of high-volume aluminosilicate precursors along with alkali-activator solutions are emerging as a cluster of promising materials that can potentially be applied to surface protection of civil infrastructures. GPCs are intensively desirable because of their improved long-term performance, life-cycle sustainability, and environmental compatibility. In the article, present efforts, confronting challenges and prospective issues of GPCs employed as "the first defense" of civil structures and members are highlighted from a perspective of practical applications. Highlights: Geopolymer-based protective coatings (GPCs) are a type of emerging materials. Current raw materials selection of GPCs is relatively arbitrary. Performance-oriented mixture formulation is desirable to GPCs. Workability and setting time can be regulated with specific additives. GPC's setting and mechanical behaviors are related to calcium content and state.