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- Title
Effect of Freezing and Thawing on Microstructure Damage and Dynamic Flexural Tension of Granite.
- Authors
Liu, Chuanju; Deng, JunRen; Yu, Songtao; Li, Ping; Lin, Yun
- Abstract
Keywords: Microstructure damage; F-T cycles; NMR; Porosity; SCB; SHPB EN Microstructure damage F-T cycles NMR Porosity SCB SHPB 3853 3858 6 07/31/20 20200801 NES 200801 Introduction In high altitude and cold regions, cyclic freezing and thawing often caused rock degradation, resulting in the instability of rock involved engineering structures such as rock slopes and tunnels. 1, cylindrical rods between samples and transmitted bar acted as supporting pins, HT <math xmlns="http://www.w3.org/1998/Math/MathML"><mi>S</mi></math> ht is the span between two rods. The strength can be calculated according to the peak value ( HT <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>p</mi><mo movablelimits="true">max</mo></msub></math> ht ), as follows (Dai et al. [4]): 1 HT <math display="block" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi> </mi><mtext>t</mtext></msub><mo>=</mo><mfrac><msub><mi>p</mi><mo movablelimits="true">max</mo></msub><mrow><mi> </mi><mi>B</mi><mi>R</mi></mrow></mfrac><mo>-</mo><mi>Y</mi><mfenced close=")" open="("><mrow><mi>S</mi><mrow><mo stretchy="true">/</mo></mrow><mrow><mn>2</mn><mi>R</mi></mrow></mrow></mfenced></mrow></math> ht Graph Graph: Fig. The dynamic flexural strength, HT <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi> </mi><mi mathvariant="normal">t</mi></msub></math> ht , is approximately proportional to HT <math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mrow><mover accent="true"><mi> </mi><mo> </mo></mover></mrow><mrow><mn>1</mn><mo stretchy="false">/</mo><mn>3</mn></mrow></msup></math> ht .
- Subjects
FREEZE-thaw cycles; GRANITE; MICROSTRUCTURE; TENSILE tests; COMPUTED tomography
- Publication
Rock Mechanics & Rock Engineering, 2020, Vol 53, Issue 8, p3853
- ISSN
0723-2632
- Publication type
Article
- DOI
10.1007/s00603-020-02127-x