Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate

This study investigates the effect of varying ratios of fly ash as a partial replacement for fine aggregate on the performance of alkali-activated municipal slag composites. The strength and other properties of alkali-activated cementitious material (AACM) composites can be optimized by selecting th...

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Autores principales:	Mahmoud Abo El-Wafa, Kimio Fukuzawa
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	alkali-activated municipal slag fly ash cementitious materials microstructure analysis steam curing Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/4687ac4e9dc5402fb37cdd7464f389a5
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spelling	oai:doaj.org-article:4687ac4e9dc5402fb37cdd7464f389a52021-11-11T17:52:14ZOptimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate10.3390/ma142162991996-1944https://doaj.org/article/4687ac4e9dc5402fb37cdd7464f389a52021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6299https://doaj.org/toc/1996-1944This study investigates the effect of varying ratios of fly ash as a partial replacement for fine aggregate on the performance of alkali-activated municipal slag composites. The strength and other properties of alkali-activated cementitious material (AACM) composites can be optimized by selecting the appropriate mix proportion. In this study, we used fly ash as a substitute for fine aggregate (FA/S) at varying ratios of 0.0, 5.0, 10.0, 15.0, 20.0, 25.0, and 30.0%, mixed with 50% water (W/SL), and 20% alkali activator (AL/SL) content instead of municipal slag (SL) as a core binder, cured in steam conditions. The effects of these substitutions on the initial mixing temperature, slump flow, compressive and splitting tensile strengths, and microstructure analysis of composites cured in steam conditions were investigated at 1, 7, 28, and 91 days. The evaluation of the experimental results revealed that increasing the ratio of fly ash substitution to fine aggregate by up to 20.0% led to a higher strength attributable to the composites, whereas when the extra substitution ratio of FA/S ranged from 25.0–30.0%, significant decreases in strength were observed. The composites’ strengths were estimated using the ACI 209 and ACI 318 design equations and compared to the measured strengths.Mahmoud Abo El-WafaKimio FukuzawaMDPI AGarticlealkali-activatedmunicipal slagfly ashcementitious materialsmicrostructure analysissteam curingTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6299, p 6299 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	alkali-activated municipal slag fly ash cementitious materials microstructure analysis steam curing Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	alkali-activated municipal slag fly ash cementitious materials microstructure analysis steam curing Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Mahmoud Abo El-Wafa Kimio Fukuzawa Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate
description	This study investigates the effect of varying ratios of fly ash as a partial replacement for fine aggregate on the performance of alkali-activated municipal slag composites. The strength and other properties of alkali-activated cementitious material (AACM) composites can be optimized by selecting the appropriate mix proportion. In this study, we used fly ash as a substitute for fine aggregate (FA/S) at varying ratios of 0.0, 5.0, 10.0, 15.0, 20.0, 25.0, and 30.0%, mixed with 50% water (W/SL), and 20% alkali activator (AL/SL) content instead of municipal slag (SL) as a core binder, cured in steam conditions. The effects of these substitutions on the initial mixing temperature, slump flow, compressive and splitting tensile strengths, and microstructure analysis of composites cured in steam conditions were investigated at 1, 7, 28, and 91 days. The evaluation of the experimental results revealed that increasing the ratio of fly ash substitution to fine aggregate by up to 20.0% led to a higher strength attributable to the composites, whereas when the extra substitution ratio of FA/S ranged from 25.0–30.0%, significant decreases in strength were observed. The composites’ strengths were estimated using the ACI 209 and ACI 318 design equations and compared to the measured strengths.
format	article
author	Mahmoud Abo El-Wafa Kimio Fukuzawa
author_facet	Mahmoud Abo El-Wafa Kimio Fukuzawa
author_sort	Mahmoud Abo El-Wafa
title	Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate
title_short	Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate
title_full	Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate
title_fullStr	Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate
title_full_unstemmed	Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate
title_sort	optimization of alkali-activated municipal slag composite performance by substituting varying ratios of fly ash for fine aggregate
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4687ac4e9dc5402fb37cdd7464f389a5
work_keys_str_mv	AT mahmoudaboelwafa optimizationofalkaliactivatedmunicipalslagcompositeperformancebysubstitutingvaryingratiosofflyashforfineaggregate AT kimiofukuzawa optimizationofalkaliactivatedmunicipalslagcompositeperformancebysubstitutingvaryingratiosofflyashforfineaggregate
_version_	1718431997904289792

Optimization of Alkali-Activated Municipal Slag Composite Performance by Substituting Varying Ratios of Fly Ash for Fine Aggregate

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