Influence of limestone addition on sodium sulphate activated blast furnace slag cements

Alastair t.m. Marsh; Zengliang Yue; Yuvaraj Dhandapani; Katharine Button; Adu-Amankwah Sam; Susan a. Bernal

doi:10.1016/j.conbuildmat.2022.129527

Influence of limestone addition on sodium sulphate activated blast furnace slag cements

Alastair t.m. Marsh, Zengliang Yue, Yuvaraj Dhandapani, Katharine Button, Adu-Amankwah Sam, Susan a. Bernal

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Abstract

The effect of limestone replacement in the reaction and phase assemblage evolution of two sodium sulfate activated slag cements was investigated. The slag composition and its reactivity influenced the reaction kinetics of these materials. Paste with limestone addition exhibited an acceleration in reaction kinetics, particularly for slowly reacting slags. Ettringite and an aluminium substituted calcium silicate hydrate were identified as main reaction products in these cements, independently of the slag type or limestone replacement level. No significant changes in phase assemblages were observed with limestone addition for over 365 days of testing; however, these composite cements exhibited an increased compressive strength, consistent with a refined pore structure. These results indicate that it is possible to partially replace slag by limestone in sulfate activated slag cements without changing the type of reaction products forming in these systems, while also increasing compressive strength and achieving a similar refined pore structure.

Original language	English
Article number	129527
Pages (from-to)	1-14
Number of pages	14
Journal	Construction and Building Materials
Volume	360
Early online date	3 Nov 2022
DOIs	https://doi.org/10.1016/j.conbuildmat.2022.129527
Publication status	Published - 19 Dec 2022

Bibliographical note

This study was supported by the School of Civil Engineering at the University of Leeds, and the UK Engineering and Physical Sciences Research Council (EPSRC) via the Early Career Fellowship EP/R001642/1. The authors are grateful with Vicky Leadley and Leslie Arkless for assistance with NMR measurements, and Dan Geddes from the University of Sheffield for assistance with MIP measurements. The data associated with this paper are openly available from the University of Leeds Data Repository, at https://doi.org/10.5518/1227.

Copyright © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

Keywords

Blast furnace slag
limestone
alkali-activated cements
hybrid cements
reaction kinetics
C-A-S-H
ettringite

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10.1016/j.conbuildmat.2022.129527Licence: CC BY 4.0

influence of limestone addition
Copyright © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
Final published version, 4.85 MBLicence: CC BY 4.0

Cite this

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title = "Influence of limestone addition on sodium sulphate activated blast furnace slag cements",

abstract = "The effect of limestone replacement in the reaction and phase assemblage evolution of two sodium sulfate activated slag cements was investigated. The slag composition and its reactivity influenced the reaction kinetics of these materials. Paste with limestone addition exhibited an acceleration in reaction kinetics, particularly for slowly reacting slags. Ettringite and an aluminium substituted calcium silicate hydrate were identified as main reaction products in these cements, independently of the slag type or limestone replacement level. No significant changes in phase assemblages were observed with limestone addition for over 365 days of testing; however, these composite cements exhibited an increased compressive strength, consistent with a refined pore structure. These results indicate that it is possible to partially replace slag by limestone in sulfate activated slag cements without changing the type of reaction products forming in these systems, while also increasing compressive strength and achieving a similar refined pore structure.",

keywords = "Blast furnace slag, limestone, alkali-activated cements, hybrid cements, reaction kinetics, C-A-S-H, ettringite",

author = "Marsh, {Alastair t.m.} and Zengliang Yue and Yuvaraj Dhandapani and Katharine Button and Adu-Amankwah Sam and Bernal, {Susan a.}",

note = "This study was supported by the School of Civil Engineering at the University of Leeds, and the UK Engineering and Physical Sciences Research Council (EPSRC) via the Early Career Fellowship EP/R001642/1. The authors are grateful with Vicky Leadley and Leslie Arkless for assistance with NMR measurements, and Dan Geddes from the University of Sheffield for assistance with MIP measurements. The data associated with this paper are openly available from the University of Leeds Data Repository, at https://doi.org/10.5518/1227. Copyright {\textcopyright} 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)",

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doi = "10.1016/j.conbuildmat.2022.129527",

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T1 - Influence of limestone addition on sodium sulphate activated blast furnace slag cements

AU - Marsh, Alastair t.m.

AU - Yue, Zengliang

AU - Dhandapani, Yuvaraj

AU - Button, Katharine

AU - Sam, Adu-Amankwah

AU - Bernal, Susan a.

N1 - This study was supported by the School of Civil Engineering at the University of Leeds, and the UK Engineering and Physical Sciences Research Council (EPSRC) via the Early Career Fellowship EP/R001642/1. The authors are grateful with Vicky Leadley and Leslie Arkless for assistance with NMR measurements, and Dan Geddes from the University of Sheffield for assistance with MIP measurements. The data associated with this paper are openly available from the University of Leeds Data Repository, at https://doi.org/10.5518/1227. Copyright © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)

PY - 2022/12/19

Y1 - 2022/12/19

N2 - The effect of limestone replacement in the reaction and phase assemblage evolution of two sodium sulfate activated slag cements was investigated. The slag composition and its reactivity influenced the reaction kinetics of these materials. Paste with limestone addition exhibited an acceleration in reaction kinetics, particularly for slowly reacting slags. Ettringite and an aluminium substituted calcium silicate hydrate were identified as main reaction products in these cements, independently of the slag type or limestone replacement level. No significant changes in phase assemblages were observed with limestone addition for over 365 days of testing; however, these composite cements exhibited an increased compressive strength, consistent with a refined pore structure. These results indicate that it is possible to partially replace slag by limestone in sulfate activated slag cements without changing the type of reaction products forming in these systems, while also increasing compressive strength and achieving a similar refined pore structure.

AB - The effect of limestone replacement in the reaction and phase assemblage evolution of two sodium sulfate activated slag cements was investigated. The slag composition and its reactivity influenced the reaction kinetics of these materials. Paste with limestone addition exhibited an acceleration in reaction kinetics, particularly for slowly reacting slags. Ettringite and an aluminium substituted calcium silicate hydrate were identified as main reaction products in these cements, independently of the slag type or limestone replacement level. No significant changes in phase assemblages were observed with limestone addition for over 365 days of testing; however, these composite cements exhibited an increased compressive strength, consistent with a refined pore structure. These results indicate that it is possible to partially replace slag by limestone in sulfate activated slag cements without changing the type of reaction products forming in these systems, while also increasing compressive strength and achieving a similar refined pore structure.

KW - Blast furnace slag

KW - limestone

KW - alkali-activated cements

KW - hybrid cements

KW - reaction kinetics

KW - C-A-S-H

KW - ettringite

UR - https://www.sciencedirect.com/science/article/pii/S095006182203183X

U2 - 10.1016/j.conbuildmat.2022.129527

DO - 10.1016/j.conbuildmat.2022.129527

M3 - Article

SN - 0950-0618

VL - 360

SP - 1

EP - 14

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 129527

ER -

Influence of limestone addition on sodium sulphate activated blast furnace slag cements

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