硫酸盐干湿循环环境下超深井井壁混凝土抗腐蚀性能

doi:10.11896/cldb.20050103

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Abstract To solve the problem of mine ultra-deep shaft lining concrete damaged by the sulfate corrosion of groundwater,the BaSO₄ precipitation, determination of chloride ion diffusion coefficient, scanning electron microscopy (SEM) image analysis, X-ray diffraction (XRD) analysis were adopted in this study. The parameters of C70 imitation steel fiber reinforced concrete (C70-ISFRC) and high performance ultra-deep shaft lining concrete (HUC) in the environment of sulfate wet-dry cycle were compared.The results show that the number and size of pores of C70-ISFRC are higher than HUC through mass change. The changing trend of mechanical properties increases first and then decreases, but the mechanical properties of HUC are better. Under the sulfate dry-wet cycle, the permeability evaluation of C70-ISFRC is low based on electric flux, and that of HUC is extremely low. After 240 sulfate dry-wet cycles, there was little liquid phase sulfate ion at 10—15 mm and 15—20 mm below the HUC surface. Compared with C70-ISFRC, HUC is not easy to form ettringite and sodium sulfate crystals in the sulfate dry-wet cycle environment, and it is not easy to deteriorate such as cracking and crystal damage. Therefore, HUC is an effective concrete material for deep well environment.

Key words： shaft wall concrete sulfate attack permeability ion diffusion

Published: 01 July 2021

CLC number:

TU528

Fund:This work was supported by the State Key Research Development Program of China (2016YFC0600803), Basic Scientific Research Business Expenses of Central Colleges and Universities(FRF-BD-20-01A,FRF-BD-20-01B).

About author:: Juanhong Liu is a professor and doctoral supervisor at the School of Civil and Resource Engineering, University of Science and Technology Beijing. She has long been engaged in the teaching and research of modern concrete technology. Presided over more than 60 projects including the National Natural Science Key Fund, General Fund, National Key Basic Research and Development Plan, Provincial and Ministerial Science and Technology Plan Projects, and horizontal scientific research projects. Won 2 first prizes, 1 second prize, and 4 third prizes for provincial and ministerial scientific and technological progress. Obtained more than 20 national invention patents. More than 160 articles have been published in public journals, and more than 60 articles have been included by SCI and EI. Published academic monographs Green High Performance Concrete Technology and Engineering Application, Reactive Powder Concrete, Solid Waste and Low Carbon Concrete, etc. Edited the textbook Civil Engineering Materials. The main scientific research results have been applied to the concrete crack control of the Beijing Olympic Project subway project; the road and bridge projects in Guangdong Province and Zhejiang Province; the key projects in Xinjiang, Ningxia and other autonomous regions; and Datang International Power Generation Co., Ltd. fly ash quality improvement.
Hongbo Ma, a postgraduate student in the School of Civil and Resource Engineering, University of Science and Technology Beijing, his current main research field is green high performance concrete.

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	LIU Juanhong
	MA Hongbo
	DUAN Pinjia
	ZHOU Yucheng
	GUO Zidong

Cite this article:

LIU Juanhong,MA Hongbo,DUAN Pinjia, et al. Corrosion Resistance of Shaft Wall Concrete in Ultra-deep Wells Under Sulphate Wet and Dry Cycling Environment[J]. Materials Reports, 2021, 35(12): 12081-12086.

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http://www.mater-rep.com/EN/10.11896/cldb.20050103 OR http://www.mater-rep.com/EN/Y2021/V35/I12/12081

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