Factors controlling solid rock strength

Golodkovskaia, G. A.; Красилова, Н.С.; Ladygin, V. M.; Shaumian, L

doi:10.1007/bf02635456

Cited by 5 publications

(3 citation statements)

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“…Rock strength is an engineering geological term that is concerned with mineral composition, structure, texture and jointing (Golodkovskaia et al 1975). It can be specified in terms of uniaxial tensile strength (UTS), uniaxial compressive strength (UCS), shear strength, and impact strength.…”

Section: Quantification Of the Influence Of Chemical Alteration On Th...mentioning

confidence: 99%

Quantification of physical and chemical paleoweathering at the microscale: a new concept

Liang

Hinderer

Hornung

2022

Int J Earth Sci (Geol Rundsch)

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Weathering is a basic geological process that refers to the breaking down or dissolving of rocks and minerals on the surface of the earth. However, weathering characteristics may vary among different lithologies even under similar conditions. To evaluate and quantitatively compare the physical and chemical index of alteration among different types of rock, new concepts of paleo-weathering such as the absolute weathering degree and the relative weathering degree are proposed for microscale studies. For the quantification of physical weathering, the index of physical weathering (IPW) is introduced. The index is defined as the ratio between the area of the fractures formed during different weathering stages and the total area of the thin section under the polarizing microscope and it is corrected by the corresponding rock strength. To quantitatively compare the chemical weathering intensity among different types of rock and minerals, the following two new concepts are introduced: total weathering mass (TWM) and chemical weathering ability (CWA). While the TWM is an integral function of weathering rate and weathering time for minerals, the CWA is the sum of the TWM of each mineral in rock within a certain time period. As a case study, this concept is applied to the weathered crystalline basement below the post-Variscan nonconformity in southwestern Germany. The petrography and geochemistry of three drillings penetrating the nonconformity were investigated by polarizing microscopy, X-ray diffractometry (XRD), scanning electron microscope (SEM), X-ray fluorescence (XRF) and inductively coupled plasma-mass spectrometry (ICP-MS). The investigations illustrate how to better extract quantitative information for both, physical and chemical weathering.

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Section: Quantification Of the Influence Of Chemical Alteration On Th...mentioning

confidence: 99%

Quantification of physical and chemical paleoweathering at the microscale: a new concept

Liang

Hinderer

Hornung

2022

Int J Earth Sci (Geol Rundsch)

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“…The most important ones are 1) Mineralogy, texture and the structure of solid rocks, 2) The structure of rock mass, which determine its strength anisotropy, 3) Water content, and 4) Stress state, which is the result of gravitational stresses and tectonic processes. Under different conditions, the effect of each factor may be quite different and one may prove to be major under a given geological condition [1]. Some early studies have revealed that rock materials are weaker when tested under 'wet' conditions rather than 'dry' [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Some early studies have revealed that rock materials are weaker when tested under 'wet' conditions rather than 'dry' [2][3][4][5][6]. Colback and Wiid (1965) presented a detailed report on the effect of moisture on the deformability and strength of sedimentary rock formations [1]. Burshtein (1969) studied some Russian sedimentary rock samples and revealed the influence of moisture content on the deformability and strength of clay-rich sandstone and quartz arenite.…”

Section: Introductionmentioning

confidence: 99%

The effect of saturation on the physical and mechanical behavior of some rock samples

Hamzaban¹

2021

CEBEL

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Different major factors control the strength of solid rocks. Moisture content is one of the most important factors, which can change the physical and mechanical behavior of intact rock as well as rock mass. Several early studies have shown that rock is weaker if tested wet rather than dry. In this paper, the density, P-wave velocity, uniaxial compressive strength, Brazilian tensile strength, and modulus of elasticity of seven different intact rock samples were measured under both dry and saturated conditions. The porosity of the samples was reported as well. Based on the obtained results, some correlations were proposed for estimating the saturated physical and mechanical properties from dry ones. The proposed correlations include different rock types and are more general than the previously reported ones. Comparing the obtained results showed that the mechanical and physical properties of weaker samples are more sensitive to the saturation process. Moreover, among the different mechanical parameters, Brazilian tensile strength exhibited more sensitivity to saturation. Comparing the results with the calculated porosities revealed that porosity is one of the key factors in the effect of saturation on physical and mechanical parameters. It seems that in the more porous rock samples, greater changes in the different measured parameters occur after saturation.

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Cognitive Biases and Their Influence on Projects

Frylinck

2024

Lecture Notes in Civil Engineering

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Factors controlling solid rock strength

Cited by 5 publications

References 1 publication

Quantification of physical and chemical paleoweathering at the microscale: a new concept

Quantification of physical and chemical paleoweathering at the microscale: a new concept

The effect of saturation on the physical and mechanical behavior of some rock samples

Cognitive Biases and Their Influence on Projects

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