›› 2009, Vol. 30 ›› Issue (2): 338-344.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of effect of chemical corrosion on strength and deformation of hard brittle limestone

YAO Hua-yan1, FENG Xia-ting1, CUI Qiang2, SHEN Lin-fang1, ZHOU Hui1, CHENG Chang-bing1   

  1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. School of Resources & Civil Engineering, Northeastern University, Shenyang 110004, China
  • Received:2008-04-02 Online:2009-02-10 Published:2011-01-27

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Abstract:

The triaxial compression test of hard brittle limestone soaked in different pH value, 0.1 mol/l, Na2SO4, CaCl2 solution and distilled water is carried out; and the effect of chemical solution on mechanical behavior of limestone is studied. The variety regulation of strength and deformation parameters are investigated. The change regulation of ion concentration of chemical solution is gained; and the mechanism of chemical corrosion on rock mechanical property is analyzed. The experimental results show that: chemical corrosion results in the transformation of brittle failure to ductile failure of rock. The cohesive force c, internal friction angle and modulus of elasticity are reduced; while the Poisson's ratio increased. The degradation of strength and deformation parameters is related to the variety of mineral amount; the great the ion concentration dissolved from the specimens, the great degradation of mechanical parameters.

Key words: hard brittle limestone, chemical corrosion, triaxial compression test, strength parameters, deformation parameters

CLC Number: 

  • TU 451
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