CO2粉煤灰基回填材料在阳离子水劣化中的耐久性

IF 2.7 3区工程技术 Q3 ENVIRONMENTAL SCIENCES

International Journal of Mining Reclamation and Environment Pub Date : 2023-05-27 DOI:10.1080/17480930.2023.2216498

Ich D. Ngo, Liqiang Ma, Jiangtao Zhai, Yangyang Wang, Tianxiang Wei

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引用次数: 0

摘要

摘要本研究旨在研究CO2粉煤灰基回填材料在阳离子水中的弱化作用。通过熟化耐久性和力学性能分析，确定了弱化的顺序为Na+>Ca2+>Mg2+。Na+通过离子交换现象破坏CFBF的微观结构，导致四面体钙的喷射。在Ca2+和Mg2+水中，N-M-A-S-H凝胶沉淀并通过双电层机制填充在开口中，这减轻了材料的进一步劣化。在此基础上，提出了适宜的阳离子类型和浓度范围，作为在矿井水害充填采煤中实施CFBF的标准。

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Durability of CO2-fly ash-based backfill materials in cation water deterioration

ABSTRACT This study aims to investigate the weakening of CO2-fly ash-based backfill (CFBF) material in cation water. Weakening is determined in an order of Na+ > Ca2+ > Mg2+ by slake durability and mechanical properties analysis. Na+ damages the microstructure of CFBF through the ion exchange phenomenon, causing the ejection of tetrahedral calcium. In Ca2+ and Mg2+ water, N-M-A-S-H gel is precipitated and filled in openings via a two electrical-layer mechanism, which mitigates the materials from further deterioration. On this basis, the suitable cation type and concentration range are proposed as criteria to implement CFBF in mine-water affected backfill coal mining.

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来源期刊

International Journal of Mining Reclamation and Environment ENVIRONMENTAL SCIENCES-MINING & MINERAL PROCESSING

CiteScore

5.70

自引率

8.30%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Mining, Reclamation and Environment published research on mining and environmental technology engineering relating to metalliferous deposits, coal, oil sands, and industrial minerals. We welcome environmental mining research papers that explore: -Mining environmental impact assessment and permitting- Mining and processing technologies- Mining waste management and waste minimization practices in mining- Mine site closure- Mining decommissioning and reclamation- Acid mine drainage. The International Journal of Mining, Reclamation and Environment welcomes mining research papers that explore: -Design of surface and underground mines (economics, geotechnical, production scheduling, ventilation)- Mine planning and optimization- Mining geostatics- Mine drilling and blasting technologies- Mining material handling systems- Mine equipment