Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review

Hemn Unis Ahmed, Azad A. Mohammed, Serwan Rafiq, Ahmed S. Mohammed, Amir Mosavi, Nadhim Hamah Sor and Shaker M. A. Qaidi
Additional contact information
Hemn Unis Ahmed: Civil Engineering Department, College of Engineering, University of Sulaimani, Kurdistan Region, Sulaimaniyah 46001, Iraq
Azad A. Mohammed: Civil Engineering Department, College of Engineering, University of Sulaimani, Kurdistan Region, Sulaimaniyah 46001, Iraq
Serwan Rafiq: Civil Engineering Department, College of Engineering, University of Sulaimani, Kurdistan Region, Sulaimaniyah 46001, Iraq
Ahmed S. Mohammed: Civil Engineering Department, College of Engineering, University of Sulaimani, Kurdistan Region, Sulaimaniyah 46001, Iraq
Amir Mosavi: Institute of Software Design and Development, Obuda University, 1034 Budapest, Hungary
Nadhim Hamah Sor: Civil Engineering Department, University of Garmian, Kurdistan Region, Kalar 46021, Iraq
Shaker M. A. Qaidi: Department of Civil Engineering, College of Engineering, University of Duhok, Kurdistan Region, Duhok 42001, Iraq

Sustainability, 2021, vol. 13, issue 24, 1-38

Abstract: The building industry, which emits a significant quantity of greenhouse gases, is under tremendous pressure due to global climate change and its consequences for communities. Given the environmental issues associated with cement production, geopolymer concrete has emerged as a sustainable construction material. Geopolymer concrete is an eco-friendly construction material that uses industrial or agricultural by-product ashes as the principal binder instead of Portland cement. Fly ash, ground granulated blast furnace slag, rice husk ash, metakaolin, and palm oil fuel ash were all employed as binders in geopolymer concrete, with fly ash being the most frequent. The most important engineering property for all types of concrete composites, including geopolymer concrete, is the compressive strength. It is influenced by different parameters such as the chemical composition of the binder materials, alkaline liquid to binder ratio, extra water content, superplasticizers dosages, binder content, fine and coarse aggregate content, sodium hydroxide and sodium silicate content, the ratio of sodium silicate to sodium hydroxide, the concentration of sodium hydroxide (molarity), curing temperature, curing durations inside oven, and specimen ages. In order to demonstrate the effects of these varied parameters on the compressive strength of the fly ash-based geopolymer concrete, a comprehensive dataset of 800 samples was gathered and analyzed. According to the findings, the curing temperature, sodium silicate content, and alkaline solution to binder ratio are the most significant independent parameters influencing the compressive strength of the fly ash-based geopolymer concrete (FA-BGPC) composites.

Keywords: geopolymer concrete; mix proportion; fly ash; compressive strength; curing; alkaline solution; sustainable concrete; sustainability; circular economy; composite materials design (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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