Acid corrosion deterioration of carbonaceous shale: Mechanism revealed from shear properties and macro-micro structure

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2025-04-02 DOI:10.1016/j.conbuildmat.2025.141062

Xiangyu Zhang , Bin Hu , Jing Li , Lei Huang , Zhen Zhang , Bingyan Li , Zhuoxi Zhong , Congcong Wan

引用次数: 0

Abstract

Aiming to investigate the deterioration mechanism of carbonaceous shale in acidic environment, direct shear tests were carried out on samples soaked in oxalic acid solution, and the macro-micro structure were scanned and analyzed. The results show that the plasticity of rock was enhanced significantly under acidic conditions. Carbonaceous shale can chemically react with oxalic acid, the fundamental mechanism of acid corrosion was the loss of mineral components and the irreversible damage of macro-micro structure. The increase of acidity and soaking time both aggravate the chemical damage, the shear properties gradually deteriorated, and eventually led to the serious deterioration of rock.

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碳质页岩酸蚀变质：从剪切性质和宏观微观结构看机理

为探讨碳质页岩在酸性环境下的变质机理，对草酸溶液浸泡样品进行了直剪试验，并对其宏观微观结构进行了扫描分析。结果表明：在酸性条件下，岩石的塑性显著增强；碳质页岩能与草酸发生化学反应，酸腐蚀的根本机理是矿物组分的损失和宏观微观结构的不可逆破坏。酸度的增加和浸泡时间的延长都加剧了化学损伤，抗剪性能逐渐恶化，最终导致岩石严重劣化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.