Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer

This paper presents a comprehensive study of the impacts of three governing factors: Alkaline concentration, curing temperature and curing period on the mechanical properties of a geopolymer that include the uniaxial compressive strength, Poisson’s ratio, and Young’s modulus of elasticity. As litera...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Pudasaini Sajan, Tengyao Jiang, ChooiKim Lau, Gang Tan, Kam Ng
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Geopolymer Fly Ash Uniaxial Compressive Strength Poisson’s Ratio Young’s Modulus Microscopic Analysis Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/6c61f4a2b39b4d34a601b4819d3e79b4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:6c61f4a2b39b4d34a601b4819d3e79b4
record_format	dspace
spelling	oai:doaj.org-article:6c61f4a2b39b4d34a601b4819d3e79b42021-12-01T05:06:56ZCombined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer2772-397610.1016/j.clema.2021.100002https://doaj.org/article/6c61f4a2b39b4d34a601b4819d3e79b42021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2772397621000022https://doaj.org/toc/2772-3976This paper presents a comprehensive study of the impacts of three governing factors: Alkaline concentration, curing temperature and curing period on the mechanical properties of a geopolymer that include the uniaxial compressive strength, Poisson’s ratio, and Young’s modulus of elasticity. As literature review indicates, most of the previous research studies were focused on the effect of single factor, while there is a lack of comprehensive studies to simultaneously investigate the combined effects of all these factors, especially in a systematic experimental setup. Acknowledging this rarely exploited area of geopolymer research, this work developed a sequential experimental setup to perform a detailed study to understand the mechanical behaviors of the geopolymer as a function of alkaline concentration, curing temperature and curing period. The test results show that the compressive strength of geopolymer is mostly governed by the curing temperature as compared to alkaline concentration and curing period. Geopolymer samples cured at 60 °C and 80 °C give a competitive compressive strength of about 30 MPa even when prepared with less alkaline activator and cured for a shorter period. This observation is justified by the microscopic analysis of samples at each curing temperature that explains the formation of microcracks, amount of unreacted fly ash, sodium-aluminosilicate hydrate crystals (NASH), calcium-silicate hydrate (CSH) crystals and efflorescence.Pudasaini SajanTengyao JiangChooiKim LauGang TanKam NgElsevierarticleGeopolymerFly AshUniaxial Compressive StrengthPoisson’s RatioYoung’s ModulusMicroscopic AnalysisMaterials of engineering and construction. Mechanics of materialsTA401-492ENCleaner Materials, Vol 1, Iss , Pp 100002- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geopolymer Fly Ash Uniaxial Compressive Strength Poisson’s Ratio Young’s Modulus Microscopic Analysis Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Geopolymer Fly Ash Uniaxial Compressive Strength Poisson’s Ratio Young’s Modulus Microscopic Analysis Materials of engineering and construction. Mechanics of materials TA401-492 Pudasaini Sajan Tengyao Jiang ChooiKim Lau Gang Tan Kam Ng Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
description	This paper presents a comprehensive study of the impacts of three governing factors: Alkaline concentration, curing temperature and curing period on the mechanical properties of a geopolymer that include the uniaxial compressive strength, Poisson’s ratio, and Young’s modulus of elasticity. As literature review indicates, most of the previous research studies were focused on the effect of single factor, while there is a lack of comprehensive studies to simultaneously investigate the combined effects of all these factors, especially in a systematic experimental setup. Acknowledging this rarely exploited area of geopolymer research, this work developed a sequential experimental setup to perform a detailed study to understand the mechanical behaviors of the geopolymer as a function of alkaline concentration, curing temperature and curing period. The test results show that the compressive strength of geopolymer is mostly governed by the curing temperature as compared to alkaline concentration and curing period. Geopolymer samples cured at 60 °C and 80 °C give a competitive compressive strength of about 30 MPa even when prepared with less alkaline activator and cured for a shorter period. This observation is justified by the microscopic analysis of samples at each curing temperature that explains the formation of microcracks, amount of unreacted fly ash, sodium-aluminosilicate hydrate crystals (NASH), calcium-silicate hydrate (CSH) crystals and efflorescence.
format	article
author	Pudasaini Sajan Tengyao Jiang ChooiKim Lau Gang Tan Kam Ng
author_facet	Pudasaini Sajan Tengyao Jiang ChooiKim Lau Gang Tan Kam Ng
author_sort	Pudasaini Sajan
title	Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
title_short	Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
title_full	Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
title_fullStr	Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
title_full_unstemmed	Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
title_sort	combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6c61f4a2b39b4d34a601b4819d3e79b4
work_keys_str_mv	AT pudasainisajan combinedeffectofcuringtemperaturecuringperiodandalkalineconcentrationonthemechanicalpropertiesofflyashbasedgeopolymer AT tengyaojiang combinedeffectofcuringtemperaturecuringperiodandalkalineconcentrationonthemechanicalpropertiesofflyashbasedgeopolymer AT chooikimlau combinedeffectofcuringtemperaturecuringperiodandalkalineconcentrationonthemechanicalpropertiesofflyashbasedgeopolymer AT gangtan combinedeffectofcuringtemperaturecuringperiodandalkalineconcentrationonthemechanicalpropertiesofflyashbasedgeopolymer AT kamng combinedeffectofcuringtemperaturecuringperiodandalkalineconcentrationonthemechanicalpropertiesofflyashbasedgeopolymer
_version_	1718405545956737024

Combined effect of curing temperature, curing period and alkaline concentration on the mechanical properties of fly ash-based geopolymer

Ejemplares similares