Properties of one-part fly ash/slag-based binders activated by thermally-treated waste glass/NaOH blends: a comparative study

M. H. Samarakoon; P. G. Ranjith; Wen Hui Duan; V. R.S. De Silva

doi:10.1016/j.cemconcomp.2020.103679

Properties of one-part fly ash/slag-based binders activated by thermally-treated waste glass/NaOH blends: a comparative study

M. H. Samarakoon, P. G. Ranjith, Wen Hui Duan, V. R.S. De Silva

Civil Engineering

Research output: Contribution to journal › Article › Research › peer-review

48 Citations (Scopus)

Abstract

Inclusion of a blend of soda-lime glass powder and sodium hydroxide as an alternative dry activator (DA) powder in fly ash/slag-based one-part alkali-activated materials (AAMs) was investigated. The reactivity of the DA was studied and the properties of DA-based AAMs were compared with both one-part and two-part AAMs activated by solid sodium silicate (NS) and sodium hydroxide/sodium silicate solution (NHNS), respectively. According to results, DA showed reasonable reactivity after heat treatment. DA-based AAMs showed the lowest flowability, but the longest setting time. The strength of NHNS-based AAMs is the highest, followed by DA- and NS-based AAMs. The main reaction product of all types of AAMs is calcium-sodium aluminosilicate hydrate (C-(N)-A-S-H)-type gel. The number of mesopores was greater for both one-part (DA and NS) AAMs than for two-part (NHNS) AAMs. According to cost and emission analyses, DA-based AAMs are cheaper and greener than commercial activator-based AAMs. This study provides a detailed experimental investigation of one-part AAMs activated by an alternative activator to replace the use of commercial alkali silicates.

Original language	English
Article number	103679
Number of pages	14
Journal	Cement and Concrete Composites
Volume	112
DOIs	https://doi.org/10.1016/j.cemconcomp.2020.103679
Publication status	Published - Sep 2020

Keywords

Cost and emissions
Dry activator
Fresh and hardened properties
One-part alkali-activated materials
Waste glass

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10.1016/j.cemconcomp.2020.103679

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title = "Properties of one-part fly ash/slag-based binders activated by thermally-treated waste glass/NaOH blends: a comparative study",

abstract = "Inclusion of a blend of soda-lime glass powder and sodium hydroxide as an alternative dry activator (DA) powder in fly ash/slag-based one-part alkali-activated materials (AAMs) was investigated. The reactivity of the DA was studied and the properties of DA-based AAMs were compared with both one-part and two-part AAMs activated by solid sodium silicate (NS) and sodium hydroxide/sodium silicate solution (NHNS), respectively. According to results, DA showed reasonable reactivity after heat treatment. DA-based AAMs showed the lowest flowability, but the longest setting time. The strength of NHNS-based AAMs is the highest, followed by DA- and NS-based AAMs. The main reaction product of all types of AAMs is calcium-sodium aluminosilicate hydrate (C-(N)-A-S-H)-type gel. The number of mesopores was greater for both one-part (DA and NS) AAMs than for two-part (NHNS) AAMs. According to cost and emission analyses, DA-based AAMs are cheaper and greener than commercial activator-based AAMs. This study provides a detailed experimental investigation of one-part AAMs activated by an alternative activator to replace the use of commercial alkali silicates.",

keywords = "Cost and emissions, Dry activator, Fresh and hardened properties, One-part alkali-activated materials, Waste glass",

author = "Samarakoon, {M. H.} and Ranjith, {P. G.} and Duan, {Wen Hui} and {De Silva}, {V. R.S.}",

note = "Funding Information: The authors would like to acknowledge Independent Cement & Lime Pty Ltd, Australia for providing the fly ash and GGBFS used in this study. The authors acknowledge the use of facilities and the assistance of Dr Jisheng Ma at the Monash X-ray Platform and would like to acknowledge the use of facilities within the Monash Centre for Electron Microscopy. Publisher Copyright: {\textcopyright} 2020 Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2020",

month = sep,

doi = "10.1016/j.cemconcomp.2020.103679",

language = "English",

volume = "112",

journal = "Cement and Concrete Composites",

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T2 - a comparative study

AU - Samarakoon, M. H.

AU - Ranjith, P. G.

AU - Duan, Wen Hui

AU - De Silva, V. R.S.

N1 - Funding Information: The authors would like to acknowledge Independent Cement & Lime Pty Ltd, Australia for providing the fly ash and GGBFS used in this study. The authors acknowledge the use of facilities and the assistance of Dr Jisheng Ma at the Monash X-ray Platform and would like to acknowledge the use of facilities within the Monash Centre for Electron Microscopy. Publisher Copyright: © 2020 Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/9

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N2 - Inclusion of a blend of soda-lime glass powder and sodium hydroxide as an alternative dry activator (DA) powder in fly ash/slag-based one-part alkali-activated materials (AAMs) was investigated. The reactivity of the DA was studied and the properties of DA-based AAMs were compared with both one-part and two-part AAMs activated by solid sodium silicate (NS) and sodium hydroxide/sodium silicate solution (NHNS), respectively. According to results, DA showed reasonable reactivity after heat treatment. DA-based AAMs showed the lowest flowability, but the longest setting time. The strength of NHNS-based AAMs is the highest, followed by DA- and NS-based AAMs. The main reaction product of all types of AAMs is calcium-sodium aluminosilicate hydrate (C-(N)-A-S-H)-type gel. The number of mesopores was greater for both one-part (DA and NS) AAMs than for two-part (NHNS) AAMs. According to cost and emission analyses, DA-based AAMs are cheaper and greener than commercial activator-based AAMs. This study provides a detailed experimental investigation of one-part AAMs activated by an alternative activator to replace the use of commercial alkali silicates.

AB - Inclusion of a blend of soda-lime glass powder and sodium hydroxide as an alternative dry activator (DA) powder in fly ash/slag-based one-part alkali-activated materials (AAMs) was investigated. The reactivity of the DA was studied and the properties of DA-based AAMs were compared with both one-part and two-part AAMs activated by solid sodium silicate (NS) and sodium hydroxide/sodium silicate solution (NHNS), respectively. According to results, DA showed reasonable reactivity after heat treatment. DA-based AAMs showed the lowest flowability, but the longest setting time. The strength of NHNS-based AAMs is the highest, followed by DA- and NS-based AAMs. The main reaction product of all types of AAMs is calcium-sodium aluminosilicate hydrate (C-(N)-A-S-H)-type gel. The number of mesopores was greater for both one-part (DA and NS) AAMs than for two-part (NHNS) AAMs. According to cost and emission analyses, DA-based AAMs are cheaper and greener than commercial activator-based AAMs. This study provides a detailed experimental investigation of one-part AAMs activated by an alternative activator to replace the use of commercial alkali silicates.

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KW - Fresh and hardened properties

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JO - Cement and Concrete Composites

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SN - 0958-9465

M1 - 103679

ER -

Properties of one-part fly ash/slag-based binders activated by thermally-treated waste glass/NaOH blends: a comparative study

Abstract

Keywords

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