1 <h5>Introduction</h5> Weathering can induce a rapid change of the rock material from initial rock-like properties to soil-like properties. The sensitivity of a rock type and the rate of occurrence of such a change is often described through a durability parameter. The durability is an important engineering parameter for all the lithotypes pertaining to the weak rock group. Mudrocks (claystone, mudstone, shale, argillite), ignimbrites and conglomerates with weak cementing material are the most common example of these rocks which can be subjected to a wide variation of their engineering properties. In fact, durability is an important rock characteristic controlling the stability of surficial and underground excavations as well as the evolution and stability of both artificial and natural slopes. As mentioned by Franklin and Chandra  , the term durability may be used in a rock engineering context to mean resistance to weakening and disintegration. This resistance to slaking is a function of different controlling parameters so often mentioned in the literature and among them are permeability and porosity, adsorption, solution or disruption of the bonds, disruptive forces and initial degree of weathering. The application of increased forces as air pressure within pores by the capillary suction (known
International Journal of Rock Mechanics and Mining Sciences – Elsevier
Published: Sep 1, 1998
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