Sustainable Fly Ash Based Geopolymer Binders: A Review on Compressive Strength and Microstructure Properties

Jyotirmoy Mishra (), Bharadwaj Nanda, Sanjaya Kumar Patro and R. S. Krishna
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Jyotirmoy Mishra: Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla 768018, India
Bharadwaj Nanda: Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla 768018, India
Sanjaya Kumar Patro: Department of Civil Engineering, Veer Surendra Sai University of Technology, Burla 768018, India
R. S. Krishna: Department of Mechanical Engineering, Veer Surendra Sai University of Technology, Burla 768018, India

Sustainability, 2022, vol. 14, issue 22, 1-41

Abstract: As a result of global warming, the pursuance of low-carbon, sustainable building materials has been prioritized. The development of geopolymer/cement-less binders can be considered an innovative and green way forward to minimize carbon footprint and tackle industrial waste material utilization. However, the chemical composition and properties of industrial waste-derived geopolymer binders varies considerably based on the chemical compositions of the source materials. This review paper presents a comprehensive understanding of the role of different chemical compositions (namely SiO 2 , Al 2 O 3 , CaO, Fe 2 O, and MgO) available in contemporary industrial wastes and the development of geopolymer binders. Subsequently, the compressive and microstructure properties of various FA-based geopolymer binders have been discussed to exhibit the feasibility of FA as a reliable source material. Significant findings and research gaps have been considered to aid future research works. Indeed, they provide guidelines for the commercial implementation of FA-based geopolymer binders as a low-carbon alternative to Portland cement.

Keywords: geopolymer; compressive strength; low-carbon composites; microstructure; waste management; green binders (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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