Considerations on strength of intact sedimentary rocks

Tsiambaos, G.; Sabatakakis, N.

doi:10.1016/j.enggeo.2003.10.001

Cited by 165 publications

(53 citation statements)

References 8 publications

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“…While some equations conform to y = ax form, the others conform to y = ax + b form. Also, Grasso et al [18] and Tsiambaos and Sabatakakis [19] derived an equation conforming to y = ax b form and Quane and Russel [10] suggested an equation conforming to y = ax 2 + bx form for weak rocks. Although conglomeratic formations are one of the most common Neogen deposit in Iran, there is little information extant in the literature on the geomechanical characteristics of weak conglomerate rocks.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the uniaxial compressive strength and Brazilian tensile strength of weak conglomerate

Minaeian

Ahangari

2017

Geo-Engineering

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Section: Introductionmentioning

confidence: 99%

Prediction of the uniaxial compressive strength and Brazilian tensile strength of weak conglomerate

Minaeian

Ahangari

2017

Geo-Engineering

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“…The Uniaxial Compressive strength was indirectly measured using the Point load test which was developed as an index test, since the samples appeared to be very broken, at least for the UCS testing method. The Point load test is widely used to determine the uniaxial compressive strength indirectly, because of its ease of testing, simplicity of sample preparation and in some case field application ( [34][35][36][37][38][39][40][41][42][43][44][45]). A correlation factor (k) between UCS and PLT strength of 12.5 has been proposed according to Brook (1980) [46], although, the value of K is disputed by many researchers.…”

Section: Materials Studied and Testing Methodsmentioning

confidence: 99%

Geotechnical and mineralogical properties of weak rocks from Central Greece

et al. 2009

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Thirty bulk samples of hard soils-soft rocks such as marls, originating from Euboea Island and Peloponnesus area, were investigated to evaluate their geotechnical behavior. Specifically, by conducting a series of physical and geotechnical tests, such as liquid limit and plastic limit tests, along with the estimation of the grain size fraction, Slake Durability and Point Load Test. Certain parameters were determined and used for empirical correlations with their mineralogical characteristics. The mineralogical composition was determined by Xray diffraction, thermo-gravimetric and thermal analysis, succeeded by textural analysis performed by Optical Microscope. With the help of the above mentioned tests, we interpreted the observed geotechnical behavior of the examined weak rocks by means of mineralogical composition and texture. Durability and the unconfined compressive strength was found to be influenced by high percentages in carbonate minerals. In addition, it was found that a decrease in clay content resulted in higher strength and durability values. The concluded empirical correlations verified the influence of these parameters and gave a general overview of the engineering behavior of the examined weak rocks.

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“…Tsiambaos and Sabatakakis (2004) and Sabatakakis et al (2008) studied the relationship between the uniaxial compressive strength of intact sedimentary rocks and point load index Is (50) and estimated that the conversion factor k (σ ci = k Is (50) ) has no a single value, but varies from 13 for soft sedimentary rocks (i.e. shales and siltstones) exhibiting a value of Is (50) <2 MPa to 28 for harder rocks with values of Is (50) greater than 5 MPa (Figure 9).…”

Section: Heterogeneous Composite Rock Massesmentioning

confidence: 99%

Engineering Geological Behaviour of Heterogeneous and Chaotic Rock Masses

Tsiambaos

2017

geosociety

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The engineering characterization of heterogeneous and complex geological formations for estimating their rock mass strength and deformability characteristics constitutes a challenge to geo-scientists and engineers dealing with the design and construction of slopes and tunnels. Mélanges and similar heterogeneous mixtures of hard blocks in weaker matrix, known as "bimrocks", present an overall strength significantly greater than the matrix strength, because the presence of rock blocks, above a threshold volumetric proportion, influences the mechanical characteristics and the behaviour of these rock masses. Moreover, recent studies have shown that the strength and mechanical behaviour of heterogeneous and composite rock masses such as flysch and molasses consisting of alternating layers of competent and incompetent rocks are governed by the presence and volumetric percentage of the interlayers of the weaker rocks.

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Considerations on strength of intact sedimentary rocks

Cited by 165 publications

References 8 publications

Prediction of the uniaxial compressive strength and Brazilian tensile strength of weak conglomerate

Prediction of the uniaxial compressive strength and Brazilian tensile strength of weak conglomerate

Geotechnical and mineralogical properties of weak rocks from Central Greece

Engineering Geological Behaviour of Heterogeneous and Chaotic Rock Masses

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