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Abstract Based on shear strength mechanism of rock joints and the selection principle and requirement of similar material，a new type of similar material with the mixture of high-strength cement，silica fume，superplasticizer，standard sand and water is developed. A large number of physico-mechanical tests are performed by using samples and rock joint models made from the new similar material. The results show that the compressive strength and elastic modulus of similar material are close to the mechanical feature of original rock；and similar material can cover low and medium-intensive rock types through adjusting the contents of different materials. The surface morphology and undulation of simulated structure surfaces made with similar material and multi-scale molds are consistent with original rock¢s surface. According to direct shear test，surface wear degree，roughness coefficient attenuation law and failure mode of original rock structural plane and simulated structural plane agree well；and the difference between test results and theoretical values is small. The similar material with the advantage of steady physico-mechanical properties，production convenience and low cost can replace natural rock joints to do different dimensional and repeated destructive rock joint tests.
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Received: 11 May 2010
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2010, Vol. 29 
