Rock Mechanics and Rock Engineering

, Volume 52, Issue 1, pp 19–34 | Cite as

Comparison of the Uniaxial Compressive Strength of the Belencito Claystone Under Stress Control and Suction Control Paths

  • Jairo Martin Espitia
  • Bernardo CaicedoEmail author
  • Luis Vallejo
Original Paper


The uniaxial compressive strength of Belencito claystone was studied through stress control and suction control path tests. Short-term uniaxial compression tests on conditioned specimens at different values of suction and long-term hydro-mechanical tests using a climatic box were performed. Volumetric deformation data and acoustic emission measurements from the short-term tests were used to determine σCD (crack damage stress threshold). Regardless of the level of suction, the σCD threshold occurred between 70 and 83% of the σpeak.short-term. The experimental results confirmed that the interpretation made by Brace and Bombolakis (J Geophys Res 68:3709–3713, 1963) and Bieniawski (Int J Rock Mech Min Sci 4:395–406, 1967) regarding long-term and short-term rock strength remains valid when considering the hydro-mechanical behaviour.


Claystone Unsaturated rock Suction Uniaxial compression Long-term rock strength Short-term rock strength 



The authors are grateful to COLCIENCIAS (Departamento Administrativo de Ciencia, Tecnología e Innovación: the Colombian Administrative Department of Science, Technology and Innovation) and the Universidad Pedagógica y Tecnológica de Colombia which provided financial support for this research through the Ph.D. thesis of the first author.


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringUniversity of Los AndesBogotáColombia
  2. 2.Department of Mining EngineeringUniversidad Pedagógica y Tecnológica de ColombiaSogamosoColombia
  3. 3.Department of Civil and Environmental EngineeringUniversity of PittsburghPittsburghUSA

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