Low Carbon Geopolymer Hollow Block—Mix Design, Casting and Strength Comparison with OPC Hollow Block
Cement masonry units are not considered as sustainable due to consumption of fuel, cement and natural resources and embracing alternatives is mandatory. Geopolymer is a green cementitious material and has excellent mechanical properties, consumes low energy in production and emits less carbon dioxide. The effects of paste volume, proportion of alkaline activator and water/solid ratio were investigated to develop self-standing dry mix of geopolymer hollow block and compared with OPC mix. Factors that require attention in casting geopolymer dry mix are discussed in this article. The optimized mix of geopolymer self-standing dry mix is expected to be found between 30 and 35% of geopolymer paste volume for 7.5% of alkaline dosage and alkaline molar ratio of 1.00.
KeywordsLow carbon Dry mix Hollow masonry unit/block Geopolymer Failure pattern
The authors gratefully acknowledge the financial support under the research grant Newton-Ungku Omar coordination fund IF007-2017: Low carbon footprint precast concrete products for an energy efficient built environment.
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