Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature

In this study, an ecofriendly binder was developed by using rice husk ash (RHA) and sodium hydroxide as the activator alongside fly ash (FA) as the aluminosilicate precursor at ambient conditions. The developed binder was used in the production of mortars with varying proportions of sand. A total of...

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Autores principales:	Juvenal Giogetti Deutou Nemaleu, Cyriaque Rodrigue Kaze, Jordan Valdès Sontia Metekong, Adeyemi Adesina, Thamer Alomayri, Micheal Stuer, Elie Kamseu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Alkali-activated materials Fly ash Compressive strength Permeability Microstructure Sustainability Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/dbb2e0f7e924412cb82ce6c093d3673a
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spelling	oai:doaj.org-article:dbb2e0f7e924412cb82ce6c093d3673a2021-12-01T05:07:12ZSynthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature2772-397610.1016/j.clema.2021.100010https://doaj.org/article/dbb2e0f7e924412cb82ce6c093d3673a2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2772397621000101https://doaj.org/toc/2772-3976In this study, an ecofriendly binder was developed by using rice husk ash (RHA) and sodium hydroxide as the activator alongside fly ash (FA) as the aluminosilicate precursor at ambient conditions. The developed binder was used in the production of mortars with varying proportions of sand. A total of three mortar mixtures were developed with sand to binder ratios of 0.55, 0.83 and 1.11. The corresponding behaviour of the mortars and influence of the sand proportions was assessed in terms of the compressive strength, water absorption, density, porosity. Microstructural investigations such as scanning electron microscopy, energy dispersive x-ray spectroscopy, infrared spectrum analysis and mercury intrusion porosimetry were also used to validate the physical properties. The findings from this study demonstrated that RHA can be used successfully as an activator component in the production of mortars. In terms of the sand content, it was found out that increasing the sand to binder ratio has detrimental effects on the performance of the mortars due to the reduction in the binder content primarily. The microstructure analysis of the mortars made with sand to binder ratio of 0.55 showed a compact and strong structure justifying the higher compressive strength achieved. The MIP analysis confirmed that the formation of C-A-S-H gel at the advanced ages allowed the pores refinement with a significant decrease in the fraction of the capillary and macroscopic pores within the geopolymer mortars.Juvenal Giogetti Deutou NemaleuCyriaque Rodrigue KazeJordan Valdès Sontia MetekongAdeyemi AdesinaThamer AlomayriMicheal StuerElie KamseuElsevierarticleAlkali-activated materialsFly ashCompressive strengthPermeabilityMicrostructureSustainabilityMaterials of engineering and construction. Mechanics of materialsTA401-492ENCleaner Materials, Vol 1, Iss , Pp 100010- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Alkali-activated materials Fly ash Compressive strength Permeability Microstructure Sustainability Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Alkali-activated materials Fly ash Compressive strength Permeability Microstructure Sustainability Materials of engineering and construction. Mechanics of materials TA401-492 Juvenal Giogetti Deutou Nemaleu Cyriaque Rodrigue Kaze Jordan Valdès Sontia Metekong Adeyemi Adesina Thamer Alomayri Micheal Stuer Elie Kamseu Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature
description	In this study, an ecofriendly binder was developed by using rice husk ash (RHA) and sodium hydroxide as the activator alongside fly ash (FA) as the aluminosilicate precursor at ambient conditions. The developed binder was used in the production of mortars with varying proportions of sand. A total of three mortar mixtures were developed with sand to binder ratios of 0.55, 0.83 and 1.11. The corresponding behaviour of the mortars and influence of the sand proportions was assessed in terms of the compressive strength, water absorption, density, porosity. Microstructural investigations such as scanning electron microscopy, energy dispersive x-ray spectroscopy, infrared spectrum analysis and mercury intrusion porosimetry were also used to validate the physical properties. The findings from this study demonstrated that RHA can be used successfully as an activator component in the production of mortars. In terms of the sand content, it was found out that increasing the sand to binder ratio has detrimental effects on the performance of the mortars due to the reduction in the binder content primarily. The microstructure analysis of the mortars made with sand to binder ratio of 0.55 showed a compact and strong structure justifying the higher compressive strength achieved. The MIP analysis confirmed that the formation of C-A-S-H gel at the advanced ages allowed the pores refinement with a significant decrease in the fraction of the capillary and macroscopic pores within the geopolymer mortars.
format	article
author	Juvenal Giogetti Deutou Nemaleu Cyriaque Rodrigue Kaze Jordan Valdès Sontia Metekong Adeyemi Adesina Thamer Alomayri Micheal Stuer Elie Kamseu
author_facet	Juvenal Giogetti Deutou Nemaleu Cyriaque Rodrigue Kaze Jordan Valdès Sontia Metekong Adeyemi Adesina Thamer Alomayri Micheal Stuer Elie Kamseu
author_sort	Juvenal Giogetti Deutou Nemaleu
title	Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature
title_short	Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature
title_full	Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature
title_fullStr	Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature
title_full_unstemmed	Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature
title_sort	synthesis and characterization of eco-friendly mortars made with rha-naoh activated fly ash as binder at room temperature
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/dbb2e0f7e924412cb82ce6c093d3673a
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Synthesis and characterization of eco-friendly mortars made with RHA-NaOH activated fly ash as binder at room temperature

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