部分替代电弧炉还原渣的二氧化碳固化富褐铁矿水泥的物理化学特性

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2024-10-24 DOI:10.1016/j.dibe.2024.100564

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引用次数: 0

摘要

本研究调查了以不同重量百分比（0-20%）的电弧炉（EAF）还原渣作为部分替代物的二氧化碳固化富褐铁矿水泥的物理化学特性。结果表明，水固化试样（WRS）的凝胶和中等毛细孔数量显著增加，而碳化固化试样（CRS）的大毛细孔和宏观孔数量增加。此外，矿渣替代率高达 10% 会导致抗压强度下降，同时二氧化碳吸收量增加，碱度降低。当 EAF 还原渣的含量从 15%增加到 20%时，CRS 的抗压强度出现了逆转趋势，pH 值明显增加，抗压强度接近 WRS。这表明，由于炼焦炉还原渣中的氧化镁可能与二氧化碳发生反应，因此较高比例的炼焦炉还原渣有利于提高二氧化碳封存效果。

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Physicochemical properties of CO2-cured belite-rich cement with electric arc furnace reduction slag as a partial replacement

This study investigates the physicochemical properties of CO₂-cured belite-rich cement with electric arc furnace (EAF) reduction slag as a partial replacement at varying weight percentages (0–20%). The results revealed that water-cured specimens (WRS) showed significant increases in the numbers of gel and medium capillary pores, while carbonation-cured specimens (CRS) demonstrated increases in the numbers of large capillary and macro pores. Moreover, up to 10% replacement of the slag led to a decrease in the compressive strength, accompanied by increased CO₂ absorption and reduced alkalinity. When the EAF reduction slag content increased from 15% to 20%, CRS exhibited a trend reversal in the compressive strength, marked by an increase in the pH, approaching compressive strength comparable to those of WRS. This signified that higher percentages of EAF reduction slag are advantageous for enhancing CO₂ sequestration due to the potential reactivity of magnesium oxide in EAF reduction slag with CO₂.

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.