Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers

In this work, the properties of alkali silicate geopolymer type materials and diatomite as additive to fly coal ash was investigated using thermic coal plant’s fly ash in alkaline solution. The reacted products of alumino-silicate geopolymers using fly ash plus diatomite were pseudo-amorphous alumin...

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Autor principal:	Kemal ŞAHBUDAK
Formato:	article
Lenguaje:	EN
Publicado:	Kaunas University of Technology 2021
Materias:	diatomite fly ash geopolymer thermal conductivity mechanical properties Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/a4125b0f4fe744b78f6c5d5409e9cccc
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spelling	oai:doaj.org-article:a4125b0f4fe744b78f6c5d5409e9cccc2021-11-09T09:48:23ZMechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers1392-13202029-728910.5755/j02.ms.26796https://doaj.org/article/a4125b0f4fe744b78f6c5d5409e9cccc2021-11-01T00:00:00Zhttps://matsc.ktu.lt/index.php/MatSc/article/view/26796https://doaj.org/toc/1392-1320https://doaj.org/toc/2029-7289In this work, the properties of alkali silicate geopolymer type materials and diatomite as additive to fly coal ash was investigated using thermic coal plant’s fly ash in alkaline solution. The reacted products of alumino-silicate geopolymers using fly ash plus diatomite were pseudo-amorphous aluminosilicate gel and calcite and their mechanical and thermal properties were evaluated by the addition of diatomite. The compressive strength of this geopolymer is similar to that of the Portland cement mortar of PC20 (± 20 %) when cured for 28 days while the density and thermal properties are much lower that indicates the insulator properties. Alkaline solution was produced by NaOH in different concentrations to determine the least alkaline solution molarity in the range of 1 M, 3 M and 5 M. The characterization of geopolymers were done by using XRD for phase analysis, SEM for surface and morphological evaluation, compression tests for mechanical properties and transient plane source thermal analysis for thermal insulation properties. The results showed that, 1 M of NaOH alkaline solution and 10wt% diatomite addition can provide enough strength of 18 MPa which is a good candidate for constructional materials. The thermal conductivity coefficient of 10 wt.% diatomite added geopolymer was evaluated as 0.0018 W/m×K which can also be a good candidate for insulator materials to be used in green lateral wall production.Kemal ŞAHBUDAKKaunas University of Technologyarticlediatomitefly ashgeopolymerthermal conductivitymechanical propertiesMining engineering. MetallurgyTN1-997ENMedžiagotyra (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	diatomite fly ash geopolymer thermal conductivity mechanical properties Mining engineering. Metallurgy TN1-997
spellingShingle	diatomite fly ash geopolymer thermal conductivity mechanical properties Mining engineering. Metallurgy TN1-997 Kemal ŞAHBUDAK Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers
description	In this work, the properties of alkali silicate geopolymer type materials and diatomite as additive to fly coal ash was investigated using thermic coal plant’s fly ash in alkaline solution. The reacted products of alumino-silicate geopolymers using fly ash plus diatomite were pseudo-amorphous aluminosilicate gel and calcite and their mechanical and thermal properties were evaluated by the addition of diatomite. The compressive strength of this geopolymer is similar to that of the Portland cement mortar of PC20 (± 20 %) when cured for 28 days while the density and thermal properties are much lower that indicates the insulator properties. Alkaline solution was produced by NaOH in different concentrations to determine the least alkaline solution molarity in the range of 1 M, 3 M and 5 M. The characterization of geopolymers were done by using XRD for phase analysis, SEM for surface and morphological evaluation, compression tests for mechanical properties and transient plane source thermal analysis for thermal insulation properties. The results showed that, 1 M of NaOH alkaline solution and 10wt% diatomite addition can provide enough strength of 18 MPa which is a good candidate for constructional materials. The thermal conductivity coefficient of 10 wt.% diatomite added geopolymer was evaluated as 0.0018 W/m×K which can also be a good candidate for insulator materials to be used in green lateral wall production.
format	article
author	Kemal ŞAHBUDAK
author_facet	Kemal ŞAHBUDAK
author_sort	Kemal ŞAHBUDAK
title	Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers
title_short	Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers
title_full	Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers
title_fullStr	Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers
title_full_unstemmed	Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers
title_sort	mechanical and thermal evaluation of diatomite doped fly ash based geopolymers
publisher	Kaunas University of Technology
publishDate	2021
url	https://doaj.org/article/a4125b0f4fe744b78f6c5d5409e9cccc
work_keys_str_mv	AT kemalsahbudak mechanicalandthermalevaluationofdiatomitedopedflyashbasedgeopolymers
_version_	1718441228183273472

Mechanical and Thermal Evaluation of Diatomite Doped Fly Ash Based Geopolymers

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