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Geopolymers as a Sustainable Binder of 21st Century: A Review
Muhammad Irfan Khan * 1 , Khairun Azizli 1 , Suriati Sufian 1 , Aamir Sada Khan 1, 2 , Hafeez Ullah 1 , Zakaria Man 1
1  Universiti Teknologi PETRONAS, Malaysia
2  University Science Technology, Bannu, Pakistan

Published: 12 November 2014 by MDPI AG in The 4th World Sustainability Forum session Sustainable Engineering and Science
Abstract: Geopolymer is a new sustainable building material, developed to reduce CO2 foot print of existing cementing material. The material offers mechanical properties comparable to Ordinary Portland cements. Advantages associated with this material include thermal stability, acid resistance, compact structure, low density and ability to encapsulate hazardous wastes.Mainly composed of waste ashes and land fill material, this material shows multiple level of sustainability. Although, most of the research is focused in the field of construction industry, there is other utilization of this material. Catalysis, coating, encapsulation of hazardous waste and separation are some of the other applications. This review discusses a brief introduction geopolymer, its history and utilization in various fields. Goals for future research are also included as part of this review.
Keywords: Geopolymer; Fly ash; Metakaolin; binder; coating