Development of Self-compacting Geopolymer Concrete Paver Blocks Using Sustainable Materials for Medium Traffic Conditions
J. Environ. Nanotechnol., Volume 14, No 2 (June 2025) pp. 196-201
Abstract
Self-compacting geopolymer concrete (SCGC) pavers are developed using sustainable material sources to reduce environmental impacts. In this research, four SCGC mixes of Fly Ash (FA), Ground Granulated Blast Furnace Slag (GGBS), and Nano Silica (NS) were fabricated to enhance the performance. The mix design is 50 % FA and 50 % GGBS, with the NS dosage ranging from 0 to 3% at 1% intervals with a 1:2.5 ratio of sodium silicate to sodium hydroxide and a 14 M concentration of sodium hydroxide. The alkaline binder ratio was kept constant at 0.5, (54 kg/m3) of water content and (9 kg/m3) of superplasticizer. The SCGC paver blocks were evaluated for their mechanical properties, including compressive strength, splitting tensile strength, and flexural strength, along with water absorption characteristics after 7 and 28 days of ambient curing. The results show that adding nano-silica significantly improved the compressive strength by up to 43.44%, the splitting tensile strength by up to 44.68%, and the flexural strength by up to 43.39% after 28 days. In addition, water absorption decreased by up to 28.6% with increasing NS content, which can be attributed to improved density and reduced porosity. The SCGC pavers can be regarded as environmentally friendly and feasible for medium-traffic conditions where lower environmental impact is combined with higher performance.
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