Sequestration of CO2 in reactive MgO cement-based mixes with enhanced hydration mechanisms

N. T. Dung; C. Unluer

doi:10.1016/j.conbuildmat.2017.03.038

Sequestration of CO₂ in reactive MgO cement-based mixes with enhanced hydration mechanisms

N. T. Dung, C. Unluer

Infrastructure and Resilience

Nanyang Technological University

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

Abstract

Strength development of reactive MgO cement-based concrete is limited by the low hydration and carbonation of MgO. This study aims to improve the hydration and mechanical performance of carbonated MgO mixes with the introduction of various hydration agents (HAs) at different concentrations. Influence of these HAs on the hydration and carbonation mechanisms under ambient and accelerated curing conditions was evaluated through isothermal calorimetry, TG, XRD and FTIR analyses. Introduction of HAs enabled extensive carbonation and strength development reaching up to ∼60 MPa at 28 days, which was 107% and 53% higher than the corresponding MgO and PC-based control mixes, respectively.

Original language	English
Pages (from-to)	71-82
Number of pages	12
Journal	Construction and Building Materials
Volume	143
DOIs	https://doi.org/10.1016/j.conbuildmat.2017.03.038 https://doi.org/10.1016/j.conbuildmat.2017.03.038
Publication status	Published - 22 Mar 2017

Keywords

Carbonation
Hydration
Microstructure
Reactive MgO
Strength
Thermal analysis

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title = "Sequestration of CO2 in reactive MgO cement-based mixes with enhanced hydration mechanisms",

abstract = "Strength development of reactive MgO cement-based concrete is limited by the low hydration and carbonation of MgO. This study aims to improve the hydration and mechanical performance of carbonated MgO mixes with the introduction of various hydration agents (HAs) at different concentrations. Influence of these HAs on the hydration and carbonation mechanisms under ambient and accelerated curing conditions was evaluated through isothermal calorimetry, TG, XRD and FTIR analyses. Introduction of HAs enabled extensive carbonation and strength development reaching up to ∼60 MPa at 28 days, which was 107% and 53% higher than the corresponding MgO and PC-based control mixes, respectively.",

keywords = "Carbonation, Hydration, Microstructure, Reactive MgO, Strength, Thermal analysis",

author = "Dung, {N. T.} and C. Unluer",

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doi = "10.1016/j.conbuildmat.2017.03.038",

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AU - Dung, N. T.

AU - Unluer, C.

PY - 2017/3/22

Y1 - 2017/3/22

N2 - Strength development of reactive MgO cement-based concrete is limited by the low hydration and carbonation of MgO. This study aims to improve the hydration and mechanical performance of carbonated MgO mixes with the introduction of various hydration agents (HAs) at different concentrations. Influence of these HAs on the hydration and carbonation mechanisms under ambient and accelerated curing conditions was evaluated through isothermal calorimetry, TG, XRD and FTIR analyses. Introduction of HAs enabled extensive carbonation and strength development reaching up to ∼60 MPa at 28 days, which was 107% and 53% higher than the corresponding MgO and PC-based control mixes, respectively.

AB - Strength development of reactive MgO cement-based concrete is limited by the low hydration and carbonation of MgO. This study aims to improve the hydration and mechanical performance of carbonated MgO mixes with the introduction of various hydration agents (HAs) at different concentrations. Influence of these HAs on the hydration and carbonation mechanisms under ambient and accelerated curing conditions was evaluated through isothermal calorimetry, TG, XRD and FTIR analyses. Introduction of HAs enabled extensive carbonation and strength development reaching up to ∼60 MPa at 28 days, which was 107% and 53% higher than the corresponding MgO and PC-based control mixes, respectively.

KW - Carbonation

KW - Hydration

KW - Microstructure

KW - Reactive MgO

KW - Strength

KW - Thermal analysis

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DO - 10.1016/j.conbuildmat.2017.03.038

M3 - Article

AN - SCOPUS:85015753567

SN - 0950-0618

VL - 143

SP - 71

EP - 82

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

Sequestration of CO₂ in reactive MgO cement-based mixes with enhanced hydration mechanisms

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Keywords

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