Taguchi-optimized triple-aluminosilicate geopolymer bricks with recycled sand: A sustainable construction solution

Case Studies in Construction Materials, Год журнала: 2023, Номер 20, С. e02780 - e02780

Опубликована: Дек. 11, 2023

Rapid infrastructure development has led to an enormous demand for cement and a huge production of construction demolition (C&D) waste. The ever-growing is leading very high amount CO2 emissions in the atmosphere. This research article focuses on addressing these two major issues emission inadequate handling C&D waste by developing novel geopolymer bricks utilizing three-aluminosilicate materials, which includes rice husk ash (RHA), ground granulated blast furnace slag (GGBS), red mud, using recycled washed sand as filler. Taguchi's method was used develop mix design making use four factors, i.e., binder percentage with six levels three alkaline solutions, sodium silicate/sodium hydroxide (SS/SH), ratio(A/B). A approach adopted preparing solution different techniques are highlighted this study. compressive strength water absorption were tested, optimum found B5 binder, 60% RHA, 20% GGBS, mud A2, SS/SH 2, alkaline/binder 0.45. maximum be 27.34 MPa, minimum also recorded at combination, 5.68%. negatively correlated degree 96% parametric map. Desirability analysis statistical ANNOVA discover percentage. Microscopic performed highest lowest values L18 experiment method. Along this, clustering algorithm evaluate scanning electron microscope (SEM) images. overall study suggested that governing factors properties bricks.

Язык: Английский

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Multiscale optimization analysis of high strength alkali-activated concrete containing waste medical glass under exposure to carbonation and elevated temperatures

Developments in the Built Environment, Год журнала: 2024, Номер 19, С. 100492 - 100492

Опубликована: Июль 2, 2024

This study focused on optimizing the effect of recycled medical glass (RMG) performance high-strength alkali-activated concrete (AAC) at different scales. RMG was incorporated into AACs to substitute a portion precursor, followed by addition fine and coarse replace river sand, respectively. Thus, effects these variables compressive strength, splitting water absorption using simplex centroid design method were examined. Additionally, freezing-thawing, carbonation resistance, residual strength elevated temperatures investigated. The experimental results showed that had strengths between 46.8 102.0 MPa, tensile 6.20 13.60 2.93 4.82%. optimized significant increment in high as compared control mixture. AAC with may provide compact microstructure low porosity enhance freeze-thaw resistance. Finally, outcomes ecological evaluation support usage sustainable building construction material.

Язык: Английский

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Multiscale microstructure and micromechanical properties of alkali-activated concrete: A critical review

Cement and Concrete Composites, Год журнала: 2024, Номер 152, С. 105664 - 105664

Опубликована: Июль 11, 2024

Язык: Английский

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Effect of olive waste ash on the properties of high‐strength geopolymer concrete

Structural Concrete, Год журнала: 2024, Номер unknown

Опубликована: Апрель 2, 2024

Abstract This study examines the effect of incorporating olive waste ash (OWA) into high‐strength geopolymer concrete (HSGC) by partially replacing fly (FA) and/or granulated blast furnace slag (GBFS) in presence rice husk (RHA). A total 18 different mixtures were prepared and divided three groups: (1) Utilizing OWA as a partial replacement for FA at weight ratio 10%–50%. (2) Incorporating substitute GBFS, with (3) Incorporate recommended The slump flow test was used to analyze fresh properties HSGC. hardening examined measuring compressive strength, tensile flexural modulus elasticity. Furthermore, an analysis conducted on water absorbency, sulfate attack, chloride penetration depth. scanning electron microscope microstructural analysis. inclusion HSGC resulted significant enhancement strength. Specifically, adding 20% increased strength 8.9% 28 days. Similarly, 30% GGBS + led improvements 17.8%, respectively. application enhanced microstructure density samples. ideal substitution varied between based weight.

Язык: Английский

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Design and optimization of binary geopolymers derived from red mud-coal gasification slag based on response surface methodology

Construction and Building Materials, Год журнала: 2025, Номер 464, С. 140203 - 140203

Опубликована: Янв. 29, 2025

Язык: Английский

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A comprehensive review of synthesis, characterization, and applications of aluminosilicate materials-based geopolymers

Environmental Advances, Год журнала: 2024, Номер 16, С. 100524 - 100524

Опубликована: Март 29, 2024

The increase in the cement industry's production, especially production of Ordinary Portland Cement (OPC), increases amount CO2 released into atmosphere, one main greenhouse gases responsible for global warming, with harmful effects on environment and human health. Against this background, geopolymer concrete is a new type inorganic polymer material that has attracted attention researchers building area, due to recycling waste by-products replace OPC reducing gas (CO2) emissions during its manufacture. It also exhibits better mechanical, thermal, chemical, electrical properties than OPC-based concrete. In same environmental context, wastewater treatment because specific surface area capability adsorption, photodegradation, encapsulation organic pollutants. principal focus paper provide an in-depth overview works have been undertaken explore geopolymer-type materials. will attempt develop comprehensive database, based last research published between 2010 2023 about 247 references, which explains elaboration, characterization, application these materials several fields. Therefore, it estimated composites are promising future candidates industrial solid waste, partial or total replacement OPCs construction industry, development adsorbents catalysts treatment.

Язык: Английский

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Physico-mechanical properties of geopolymer mortars for repair applications: Impact of binder to sand ratio

Construction and Building Materials, Год журнала: 2024, Номер 412, С. 134721 - 134721

Опубликована: Янв. 1, 2024

Язык: Английский

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Mechanical properties and enhancement mechanism of iron ore tailings as aggregate for manufacturing ultra-high performance geopolymer concrete

Construction and Building Materials, Год журнала: 2024, Номер 439, С. 137362 - 137362

Опубликована: Июль 7, 2024

Язык: Английский

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Enhanced removal of methylene blue and procion deep red H-EXL dyes from aqueous environments by modified-bentonite: Isotherm, kinetic, and thermodynamic

Desalination and Water Treatment, Год журнала: 2024, Номер 320, С. 100607 - 100607

Опубликована: Июль 15, 2024

This study aims to enhance local bentonite's effectiveness in removing methylene blue and procion deep red dyes from aqueous media through organic modification with cetyltrimethylammonium bromide surfactant. Raw modified bentonites were analyzed using XRF, XRD, FTIR, BET/BJH, DSC techniques. The bentonite showed a crystalline structure mesoporous morphology heterogeneous surface. Optimal adsorption conditions for MB dye 0.2 g adsorbent dose, 60 min contact time, mg/L initial concentration, pH 8, achieving maximum sorption capacity of 6.418 mg/g. For PDR dye, optimal 0.125 40 30 acidic pH, 8.503 Isotherm analysis indicated the Langmuir model best fits data, suggesting mono-layer process. Kinetic investigations revealed that follows pseudo-second-order model, indicating chemisorption mechanism. Thermodynamic results exothermic endothermic PDR. work highlights potential surfactant-modified as cost-effective sorbent treating polluted systems, effectively both cationic anionic dyes.

Язык: Английский

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Mechanical activation of coal gasification slag for one-part geopolymer synthesis by alkali fusion and component additive method

Construction and Building Materials, Год журнала: 2023, Номер 411, С. 134585 - 134585

Опубликована: Дек. 22, 2023

Язык: Английский

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