Geopolymers Manufactured by the Alkali Activation of Mining and Ceramic Wastes Using a Potential Sustainable Activator from Olive Stone Bottom Ashes

Materials, Journal Year: 2025, Volume and Issue: 18(3), P. 688 - 688

Published: Feb. 4, 2025

The reuse of by-products as alternative raw materials to traditional construction is required in order ensure sustainable development the sector and a significant important focus fields science. This study developed geopolymers using from mining, ceramics, olive industries, including slate stone cutting sludge (SSCS) chamotte (CH) aluminosilicate sources, biomass bottom ash (OSBA) an alkaline activator with sodium silicate. A key novelty research lies use SSCS, underexplored by-product geopolymerization studies, viable source. were prepared varying weight ratios CH, OSBA/Na₂SiO₃ (1.7, 1.9, 2.2, 2.4). Physical mechanical tests determined optimal formulation, while FTIR SEM analyses revealed material’s chemical structural evolution. analysis detected quartz carbonate phases, indicating incomplete dissolution formation during calcination. dense microstructure reduced porosity enhanced samples higher OSBA content. geopolymer (60% OSBA, 30% ratio 2.2) achieved compressive strength 33.1 MPa after 28 days. These findings demonstrate feasibility producing promoting industrial alternatives conventional binders.

Language: Английский

Ecological mortars produced from sustainable hydrated lime obtained from biomass ash

Next Sustainability, Journal Year: 2024, Volume and Issue: 5, P. 100067 - 100067

Published: Aug. 15, 2024

Language: Английский

Utilization of Municipal Solid Waste Incineration (MSWIFA) in Geopolymer Concrete: A Study on Compressive Strength and Leaching Characteristics

Materials, Journal Year: 2024, Volume and Issue: 17(18), P. 4609 - 4609

Published: Sept. 20, 2024

This study explores the utilization of municipal solid waste incineration fly ash (MSWIFA) in geopolymer concrete, focusing on compressive strength and heavy metal leachability. MSWIFA was sourced from a Shenzhen plant pretreated by washing to remove soluble salts. Geopolymer concrete prepared incorporate with washed or unwashed tested under different pH conditions (2.88, 4.20, 10.0). Optimal achieved Si/Al ratio 1.5, water/Na 10, sand-binder 0.6. The pretreatment significantly enhanced strength, particularly alkaline conditions, GP-WFA (washed MSWIFA) exhibiting 49.6% increase compared 21.3% GP-FA (unwashed MSWIFA). Additionally, GP-WFA’s reached 41.7 MPa, comparable that control (GP-control) at 43.7 MPa. Leaching tests showed acidic (pH 2.88) promoted leaching, which increased over leaching time, while an environment reduced leachability metals. These findings highlight potential using promoting sustainable construction practices, conditions.

Language: Английский