Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils

Geopolymer, also referred to as “alkali-activated material” or “zeocement”, is an emerging sustainable material to replace Portland cement-based binder. It requires a straightforward process and has the potential for large-scale waste valorisation and utilisation and a lower carbon footprint. Severa...

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Autores principales:	April Anne S. Tigue, Alberto L. Longos Jr., Roy Alvin J. Malenab, Ithan Jessemar R. Dollente, Michael Angelo B. Promentilla
Formato:	article
Lenguaje:	EN
Publicado:	AIDIC Servizi S.r.l. 2021
Materias:	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/9a76f56cdc1f44f193b11d250cde7919
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spelling	oai:doaj.org-article:9a76f56cdc1f44f193b11d250cde79192021-11-15T21:47:02ZCompressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils10.3303/CET21881942283-9216https://doaj.org/article/9a76f56cdc1f44f193b11d250cde79192021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/11987https://doaj.org/toc/2283-9216Geopolymer, also referred to as “alkali-activated material” or “zeocement”, is an emerging sustainable material to replace Portland cement-based binder. It requires a straightforward process and has the potential for large-scale waste valorisation and utilisation and a lower carbon footprint. Several aluminosilicate materials as geopolymer precursors have been explored, such as coal fly ash and metakaolin, among others. However, the characteristics of raw materials vary depending on the source. Hence, this study aims to synthesise geopolymer composite from raw materials that are available locally. Coal fly ash and nickel laterite mine spoils were explored as a potential geopolymer precursor. Optimal mix formulation of 50 % nickel laterite mine spoils / 50 % coal fly ash, sodium hydroxide to sodium silicate ratio of 1:2, and activator to precursor ratio of 0.44:1 yielded a 28 d compressive strength of 22.1 ± 4.4 MPa and a 180 d compressive strength of 32.3 ± 7.4 MPa. The result implies that this eco-friendly geopolymer material can be potentially used for pedestrian pavers, light traffic pavers, and plain concrete for levelling and structural applications. Before any field-scale application, investigating the leachability of material is imperative. Hence, the toxicity characteristic leaching procedure (TCLP) was employed to evaluate the leachability behaviour of both the raw materials and developed geopolymer composite in this study. The results revealed that the concentration of the trace metals released pose no significant environmental and leaching hazard into the soil, surface, and groundwater sources based on the threshold limit as defined by USEPA.April Anne S. TigueAlberto L. Longos Jr.Roy Alvin J. MalenabIthan Jessemar R. DollenteMichael Angelo B. PromentillaAIDIC Servizi S.r.l.articleChemical engineeringTP155-156Computer engineering. Computer hardwareTK7885-7895ENChemical Engineering Transactions, Vol 88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
spellingShingle	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895 April Anne S. Tigue Alberto L. Longos Jr. Roy Alvin J. Malenab Ithan Jessemar R. Dollente Michael Angelo B. Promentilla Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils
description	Geopolymer, also referred to as “alkali-activated material” or “zeocement”, is an emerging sustainable material to replace Portland cement-based binder. It requires a straightforward process and has the potential for large-scale waste valorisation and utilisation and a lower carbon footprint. Several aluminosilicate materials as geopolymer precursors have been explored, such as coal fly ash and metakaolin, among others. However, the characteristics of raw materials vary depending on the source. Hence, this study aims to synthesise geopolymer composite from raw materials that are available locally. Coal fly ash and nickel laterite mine spoils were explored as a potential geopolymer precursor. Optimal mix formulation of 50 % nickel laterite mine spoils / 50 % coal fly ash, sodium hydroxide to sodium silicate ratio of 1:2, and activator to precursor ratio of 0.44:1 yielded a 28 d compressive strength of 22.1 ± 4.4 MPa and a 180 d compressive strength of 32.3 ± 7.4 MPa. The result implies that this eco-friendly geopolymer material can be potentially used for pedestrian pavers, light traffic pavers, and plain concrete for levelling and structural applications. Before any field-scale application, investigating the leachability of material is imperative. Hence, the toxicity characteristic leaching procedure (TCLP) was employed to evaluate the leachability behaviour of both the raw materials and developed geopolymer composite in this study. The results revealed that the concentration of the trace metals released pose no significant environmental and leaching hazard into the soil, surface, and groundwater sources based on the threshold limit as defined by USEPA.
format	article
author	April Anne S. Tigue Alberto L. Longos Jr. Roy Alvin J. Malenab Ithan Jessemar R. Dollente Michael Angelo B. Promentilla
author_facet	April Anne S. Tigue Alberto L. Longos Jr. Roy Alvin J. Malenab Ithan Jessemar R. Dollente Michael Angelo B. Promentilla
author_sort	April Anne S. Tigue
title	Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils
title_short	Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils
title_full	Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils
title_fullStr	Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils
title_full_unstemmed	Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils
title_sort	compressive strength and leaching characteristic of geopolymer composite from coal fly ash and nickel laterite mine spoils
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/9a76f56cdc1f44f193b11d250cde7919
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_version_	1718426859760254976

Compressive Strength and Leaching Characteristic of Geopolymer Composite from Coal Fly Ash and Nickel Laterite Mine Spoils

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