Synergistic effect of CO2-mineralized steel slag and carbonation curing on cement paste

Linshan Li; Tiefeng Chen; Xiaojian Gao

doi:10.1016/j.cemconcomp.2023.105357

Synergistic effect of CO₂-mineralized steel slag and carbonation curing on cement paste

Linshan Li
, Tiefeng Chen^*
, Xiaojian Gao^*

^*Corresponding author for this work

School of Civil Engineering

School of Civil Engineering, Harbin Institute of Technology

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

93 Scopus citations

Abstract

Cement-based materials have favorable capacity of solid waste and CO₂ disposal. In this study, a synergistic CO₂ treatment, including CO₂ mineralization of steel slag admixture and carbonation curing of cement paste, was proposed. The influence of synergistic CO₂ treatment on pozzolanic activity of steel slag, CO₂ sequestration, and compressive strength of specimens were investigated. Results show that synergistic CO₂ treatment cannot significantly increase the compressive strength but can improve the CO₂ sequestration efficiently (up to 10.76 %), while a single CO₂ treatment could only improve CO₂ sequestration by 6.75 %. MIP, ²⁹Si NMR, XRD-rietveld, and Raman spectroscopy were used to determine the effect of synergistc CO₂ treatment on microstructure and mineral composition of samples. A barrier layer generated on the surface of steel slag particle was observed in SEM images. This barrier layer composed of carbonates reduces the early activity of CO₂ mineralized steel slag.

Original language	English
Article number	105357
Journal	Cement and Concrete Composites
Volume	145
DOIs	https://doi.org/10.1016/j.cemconcomp.2023.105357
State	Published - Jan 2024

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 12 Responsible Consumption and Production

Keywords

CO sequestration
CO treatment
Carbonation curing
Portland cement
Steel slag

Access to Document

10.1016/j.cemconcomp.2023.105357

Cite this

@article{68feff894d7d4198a139e160756a597f,

title = "Synergistic effect of CO2-mineralized steel slag and carbonation curing on cement paste",

abstract = "Cement-based materials have favorable capacity of solid waste and CO2 disposal. In this study, a synergistic CO2 treatment, including CO2 mineralization of steel slag admixture and carbonation curing of cement paste, was proposed. The influence of synergistic CO2 treatment on pozzolanic activity of steel slag, CO2 sequestration, and compressive strength of specimens were investigated. Results show that synergistic CO2 treatment cannot significantly increase the compressive strength but can improve the CO2 sequestration efficiently (up to 10.76 \%), while a single CO2 treatment could only improve CO2 sequestration by 6.75 \%. MIP, 29Si NMR, XRD-rietveld, and Raman spectroscopy were used to determine the effect of synergistc CO2 treatment on microstructure and mineral composition of samples. A barrier layer generated on the surface of steel slag particle was observed in SEM images. This barrier layer composed of carbonates reduces the early activity of CO2 mineralized steel slag.",

keywords = "CO sequestration, CO treatment, Carbonation curing, Portland cement, Steel slag",

author = "Linshan Li and Tiefeng Chen and Xiaojian Gao",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier Ltd",

year = "2024",

month = jan,

doi = "10.1016/j.cemconcomp.2023.105357",

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volume = "145",

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AU - Li, Linshan

AU - Chen, Tiefeng

AU - Gao, Xiaojian

PY - 2024/1

Y1 - 2024/1

N2 - Cement-based materials have favorable capacity of solid waste and CO2 disposal. In this study, a synergistic CO2 treatment, including CO2 mineralization of steel slag admixture and carbonation curing of cement paste, was proposed. The influence of synergistic CO2 treatment on pozzolanic activity of steel slag, CO2 sequestration, and compressive strength of specimens were investigated. Results show that synergistic CO2 treatment cannot significantly increase the compressive strength but can improve the CO2 sequestration efficiently (up to 10.76 %), while a single CO2 treatment could only improve CO2 sequestration by 6.75 %. MIP, 29Si NMR, XRD-rietveld, and Raman spectroscopy were used to determine the effect of synergistc CO2 treatment on microstructure and mineral composition of samples. A barrier layer generated on the surface of steel slag particle was observed in SEM images. This barrier layer composed of carbonates reduces the early activity of CO2 mineralized steel slag.

AB - Cement-based materials have favorable capacity of solid waste and CO2 disposal. In this study, a synergistic CO2 treatment, including CO2 mineralization of steel slag admixture and carbonation curing of cement paste, was proposed. The influence of synergistic CO2 treatment on pozzolanic activity of steel slag, CO2 sequestration, and compressive strength of specimens were investigated. Results show that synergistic CO2 treatment cannot significantly increase the compressive strength but can improve the CO2 sequestration efficiently (up to 10.76 %), while a single CO2 treatment could only improve CO2 sequestration by 6.75 %. MIP, 29Si NMR, XRD-rietveld, and Raman spectroscopy were used to determine the effect of synergistc CO2 treatment on microstructure and mineral composition of samples. A barrier layer generated on the surface of steel slag particle was observed in SEM images. This barrier layer composed of carbonates reduces the early activity of CO2 mineralized steel slag.

KW - CO sequestration

KW - CO treatment

KW - Carbonation curing

KW - Portland cement

KW - Steel slag

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