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Multistage reaction characteristics and kinetic effects of temperature on pyrite oxidation in black rock layers:Insights from high-speed railway subgrade filling materials

文献类型：期刊论文

作者Liu, Zihang5,6; Huang, Kang4,6; Dai, Zhangjun6; Yu, Fei6; Song, Xiaodong3; You, Yibing2; Li, Zejun1; Chen, Shanxiong6
刊名CASE STUDIES IN CONSTRUCTION MATERIALS
出版日期2025-07-01
卷号22页码:16
关键词Black rock layers Temperature High-speed rail SO42-concentration Subgrade Pyrite
ISSN号2214-5095
DOI10.1016/j.cscm.2025.e04485
英文摘要This study systematically analyzes the effects of temperature on the pyrite oxidation process in black rock layers, addressing the swelling and uplift issues in a high-speed railway subgrade in western Hunan. Experiments were conducted at 35 degrees C, 25 degrees C, and 4 degrees C to examine the generation rates and time-dependent changes of SO42-, Ca2+, and Mg2+ during pyrite oxidation. The results show that elevated temperatures significantly accelerate pyrite oxidation, with SO42- reaching a maximum concentration of 2012 mg/L at 35 degrees C and a minimum of 1527 mg/L at 4 degrees C. Additionally, the temperature strongly affects the release of Ca2+ and Mg2+, closely linked to the dissolution of calcite and dolomite due to the acidic products of pyrite oxidation. SEM analysis reveals that higher temperatures intensify porosity increase and fracture expansion, leading to rock structure deterioration. These findings highlight the critical role of temperature in the pyrite oxidation process, particularly in high-speed railway subgrade projects, where understanding the influence of temperature on black rock layer oxidation and ion release is essential for predicting and preventing structural damage caused by oxidation reactions.
资助项目National Natural Science Foundation of China[42172308] ; Youth Innovation Promotion Association CAS[2022331] ; Science and Technology Research and Development Program of China Railway Guangzhou Group Co., Ltd.[2023K022-K]
WOS研究方向Construction & Building Technology ; Engineering ; Materials Science
语种英语
WOS记录号WOS:001441745100001
出版者ELSEVIER
源URL[http://119.78.100.198/handle/2S6PX9GI/36678]  
专题中科院武汉岩土力学所
通讯作者Dai, Zhangjun
作者单位1.China Railway No 5 Engn Grp Co, Guiyang 550000, Peoples R China
2.China Railway Guangzhou Grp Co Ltd, Guangzhou 510000, Peoples R China
3.Shanghai Kunming High Speed Railway Hunan Co Ltd, Changsha 410000, Peoples R China
4.Changjiang River Sci Res Inst, Key Lab Geotech Mech & Engn, Minist Water Resources, Wuhan 430010, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Zihang,Huang, Kang,Dai, Zhangjun,et al. Multistage reaction characteristics and kinetic effects of temperature on pyrite oxidation in black rock layers:Insights from high-speed railway subgrade filling materials[J]. CASE STUDIES IN CONSTRUCTION MATERIALS,2025,22:16.
APA Liu, Zihang.,Huang, Kang.,Dai, Zhangjun.,Yu, Fei.,Song, Xiaodong.,...&Chen, Shanxiong.(2025).Multistage reaction characteristics and kinetic effects of temperature on pyrite oxidation in black rock layers:Insights from high-speed railway subgrade filling materials.CASE STUDIES IN CONSTRUCTION MATERIALS,22,16.
MLA Liu, Zihang,et al."Multistage reaction characteristics and kinetic effects of temperature on pyrite oxidation in black rock layers:Insights from high-speed railway subgrade filling materials".CASE STUDIES IN CONSTRUCTION MATERIALS 22(2025):16.

入库方式： OAI收割

来源：武汉岩土力学研究所

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