Rheological, Carbon Sequestration, and Mechanical Properties of Solid Waste-Based Carbon-Negative Backfill Materials: Effect of Reaction Temperature
固廃棄物由来のカーボンネガティブバックフィル材のレオロジー、炭素固定、および力学特性：反応温度の影響 (AI 翻訳)
Shihao Xing, Yuyang Xia, Meng Li, Peng Huang, Jixiong Zhang, Majid Sartaj, Zhibo Cui
🤖 gxceed AI 要約
日本語
本研究では、石炭系固廃棄物を用いたカーボンネガティブバックフィル材において、反応温度（25～130℃）がレオロジー、炭素固定率、力学特性に及ぼす影響を実験的に調査した。その結果、降伏応力は温度上昇とともに増加し、85℃でポンプ圧送限界を超えること、55℃で最大炭素固定率5.23%と一軸圧縮強度7.08 MPaを達成することを明らかにした。これらの知見は、CO2固定プロセスの最適化と工学的応用に重要な技術的パラメータを提供する。
English
This study investigates the effect of reaction temperature (25–130°C) on rheological, carbon sequestration, and mechanical properties of coal-based solid waste backfill materials. Yield stress increases with temperature and exceeds industrial pumping limits at 85°C. Optimal carbonation rate (5.23%) and UCS (7.08 MPa) occur at 55°C. Findings provide key parameters for engineering CO2 sequestration in mine backfill.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本でも石炭火力発電所から発生するフライアッシュやスラグの有効利用が課題であり、本研究成果はカーボンネガティブ材料の開発やCCUS技術の最適化に応用可能である。特に鉱山廃坑を利用したCO2固定技術への展開が期待される。
In the global GX context
This paper provides systematic engineering data for carbon-negative backfill materials, contributing to the global CCUS literature by establishing temperature-performance relationships. The findings support industrial deployment of CO2 sequestration in mining operations, relevant for international efforts to scale carbon removal in hard-to-abate sectors.
👥 読者別の含意
🔬研究者:Researchers in carbon sequestration and mine backfill can use the optimal temperature parameters and rheology-strength correlations to design efficient CO2 storage systems.
🏢実務担当者:Mining and construction firms can apply the 55°C optimal temperature and pumping constraints to scale up carbon-negative backfill operations.
📄 Abstract（原文）
Utilizing coal-based solid waste (CSW) for carbon-negative backfill mining offers a promising pathway for CSW disposal and CO 2 sequestration. However, the influence of reaction temperature on the rheological, carbon sequestration, and mechanical properties of the CSW backfill material remains unclear. In this study, coal gangue, fly ash, slag, and cement were used, and a temperature-adjustable carbonation testing system was employed to prepare and carbonate the CSW backfill material. Experimental groups were tested at reaction temperatures from 25 to 130 °C. Through thermogravimetric analysis, rheological tests, unconfined compressive strength (UCS) tests, and microscopic characterization, the effects of reaction temperature on carbonation rate, rheological, and mechanical properties were studied. The results show that the rheological behavior conforms to the Herschel–Bulkley model, and the yield stress increases with reaction temperature due to accelerated hydration and moisture evaporation. Once the reaction temperature reaches 85 °C, the yield stress exceeds the industrial pumping limit. The maximum carbonation rate of 5.23% and UCS 7.08 MPa were attained at 55 °C. This is due to increased reactivity of alkaline minerals and accelerated hydration at higher reaction temperatures. These findings provide theoretical support and key technical parameters for the optimization and engineering application of the CO 2 sequestration process of CSW backfill material.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.energyfuels.6c02010first seen 2026-07-13 06:11:26
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