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Science and Technology of Nuclear Installations
Volume 2016, Article ID 7853787, 11 pages
http://dx.doi.org/10.1155/2016/7853787
Research Article

Effect of Chemical Corrosion on the Mechanical Characteristics of Parent Rocks for Nuclear Waste Storage

1Institute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an 710048, China
2School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an 710048, China
3State Key Laboratory Base of Ecohydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an 710048, China

Received 29 March 2016; Accepted 16 May 2016

Academic Editor: Xing Chen

Copyright © 2016 Tielin Han et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Long-term immersion was adopted to explore the damage deterioration and mechanical properties of granite under different chemical solutions. Here, granite was selected as the candidate of parent rocks for nuclear waste storage. The physical and mechanical properties of variation regularity immersed in various chemical solutions were analyzed. Meanwhile, the damage variable based on the variation in porosity was used in the quantitative analysis of chemical damage deterioration degree. Experimental results show that granite has a significant weakening tendency after chemical corrosion. The fracture toughness , splitting tensile strength, and compressive strength all demonstrate the same deteriorating trend with chemical corrosion time. However, a difference exists in the deterioration degree of the mechanical parameters; that is, the deterioration degree of fracture toughness is the greatest followed by those of splitting tensile strength and compressive strength, which are relatively smaller. Strong acid solutions may aggravate chemical damage deterioration in granite. By contrast, strong alkaline solutions have a certain inhibiting effect on chemical damage deterioration. The chemical solutions that feature various compositions may have different effects on chemical damage degree; that is, ions have a greater effect on the chemical damage in granite than ions.