Weathering effects on the strength and deformational behaviour of crystalline rocks under uniaxial compression state

Elastic Properties of Rocks

“…Tuğrul and Zarif (2000) suggested similar linear function for limestones, while power functions have been reported by Duncan and Dunne (1967), Dearman and Irfan (1978), Irfan and Powell (1985), Turk et al (1994), Gupta and Rao (2000) for igneous, metamorphic and sedimentary rocks having different degree of weathering.…”

Constraints on mechanisms for the growth of gully alcoves in Gasa crater, Mars, from two-dimensional stability assessments of rock slopes

“…Table 1 lists the material properties used in the stability models. The unconfined compressive strength (UCS) of heavily weathered basalt is assumed to be 2% of the strength of non-weathered basalt (after Gupta and Rao (2000)). The density of heavily weathered basalt is prescribed as 66% of the weight of non-weathered basalt (Gupta and Rao, 2000).…”

“…The unconfined compressive strength (UCS) of heavily weathered basalt is assumed to be 2% of the strength of non-weathered basalt (after Gupta and Rao (2000)). The density of heavily weathered basalt is prescribed as 66% of the weight of non-weathered basalt (Gupta and Rao, 2000). Density is based on the average martian southern highlands (McKenzie et al, 2002;Turcotte et al, 2002;McGovern et al, 2004) and assumes 10% H 2 O (by volume) for water-or ice-saturated conditions.…”

Impact of weathering on macro-mechanical properties of chalks

“…The process is dependent on climate, water and temperature, as well as on the nature and degree of fissuring of the rock. Alteration generally leads to less-coherent rocks, promoting their deterioration and eventual failure (Gupta & Seshagiri Rao 2000, Massuda 2001. Macroscopic signs of alteration include the appearance of cracks, microfractures and macroporosity, as well as the presence of hard deposits that result from chemical transformations (Oyama & Chigira 2000).…”

“…Macroscopic signs of alteration include the appearance of cracks, microfractures and macroporosity, as well as the presence of hard deposits that result from chemical transformations (Oyama & Chigira 2000). The alteration of rocks by dissolution (limestones, tuffs, sandstones, crystalline rocks), with or without mineral neoformation, has been studied by numerous authors (Gupta & Seshagiri Rao 2000).…”