Influence of water content on the strength of rock

Vásárhelyi, Balázs; Ván, P.

doi:10.1016/j.enggeo.2005.11.011

Cited by 291 publications

(103 citation statements)

References 4 publications

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“…This section shows how water may cause discontinuity degradation. The alteration is performed on six different limestone's sample ( (5) 2185 (5) 2573 (5) 2674 (5) 2230 (3) 2680 (8) UCS * (MPa) 26 50 (3) 175 (5) 180 (1) 80 (3) 145 (8) Total porosity (%) 24 14 (3) 6.7 (4) <1 (5) 17,4…”

Section: Alteration Of Limestones In Laboratorymentioning

confidence: 99%

“…The reaction between water and calcite shows dissociation with product of reaction calcium ion and carbonate ion CaCO 3 + CO 2 In addition of chemical reactions, there are also physical mechanisms whose modify the rock cohesion in order to open the way of chemical degradation [8]. Some features of the rock will be modified by the influence of water [8] [9].…”

Section: Introductionmentioning

confidence: 99%

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Multi-scale analysis of water alteration on the rockslope stability framework

et al. 2014

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ABSTRACT:Water is an important weathering factor on rock discontinuities and in rock mass mechanical behavior. The increase of rainfall in frequency or in intensity highlights some problems on the rock slope stability analysis. The aim of this paper is the multi scale analysis of the chemical impact of water on rock (surface roughness and matrix). In this study we show how water induces degradation and thus may decreases the stability of the discontinuous rock mass. Water is known to have significant erosion and dissolution effects on rock surface or rock matrix. The chemical features of water such as temperature, pH or salinity make it a "good" candidate to rock degradation. This study has two main components. The first one is the study of water-solid chemical mechanisms and the other is the analysis of the mechanical response of the discontinuity modified by the water alteration. The stability of the rock mass is naturally a function of the type and the space distribution of discontinuities. The study aims also to evaluate the effect of water flow on the rock slope stability and it is performed at two space scales: laboratory (micro scale and macro scale) and in situ scales. The last one is still under investigation and will be presented.

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Section: Alteration Of Limestones In Laboratorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-scale analysis of water alteration on the rockslope stability framework

et al. 2014

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“…Many researchers have studied the effect of moisture content on the engineering properties of rock [21][22][23][24][25]. Moisture content is one of the most important factors influencing rock strength [26].…”

Section: Effects Of Aggregate Moisture Content On the Mechanical Strementioning

confidence: 99%

Influence of Aggregate Moisture Content on the Mechanical Properties of Resin Mineral Composite

Yin¹,

Zhang²,

Zhang³

et al. 2015

Proceedings of the International Conference on Chemical, Material and Food Engineering

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INTRODUCTIONMachine tool bed plays an important role in the manufacturing industry, which could provide mechanical products of better precision and surface quality. However, vibration generated in the machining process has much more influence on the dimensional precision and surface quality of the workpiece, which prohibits high-speed and high-precision machining from developing rapidly. How to minimize vibration during the manufacturing process is now an important factor that affects machining precision and the stability of machine tool [1] [2].Resin mineral composite (RMC) is a composite material similar to plain concrete that it is composed of granite particles as solid aggregate. The difference is that the binder is organic resin. With the development of high-speed and high-precision machining technology, RMC has attracted more and more attention for its good vibration alleviating properties [3]. Compared with gray cast iron and welded steel, RMC has ten times the damping ratio that it can better absorb vibrations generated in the machining process, especially in high-speed and high-precision machining processes [2] [4]. However, the application of RMC is restricted by its limitation in mechanical strength, and considerable research should be done to improve its mechanical properties in order to satisfy the requirements of high-speed and high-precision machining.The mechanical strength of fully cured RMC is highly related to its components and the interface between the resin matrix and filler [5] on the mechanical strength of RMC. However, little information has been focused on the influences of aggregate moisture content on the mechanical strength of RMC. As the key component in RMC to bear loads, the aggregate weight of the total composite material accounts for more than 85%, the physical and chemical properties of the aggregate has a significant impact on the mechanical properties of RMC [5]. Influence of aggregate moisture content on the mechanical strength of RMC was not received sufficient attention. Fontana and Reams [14] revealed that 3% of pre-existing water in aggregates reduces the compressive strength of the PC by half. Header and Mohammad [15] found that the polymer concrete's flexural strength decreased from 25.8 MPato 0.68 MPa and compressive strength from 190MPa to 85 MPa when the initial moisture added to the aggregate content increased from 0% to 5%. However, data is still scarce. We need to provide more documents. In this International Conference on Chemical, Material and Food Engineering (CMFE-2015)

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“…Water content can remarkably reduce the rock strength after only 1% water saturation 5,6 . The strength of a wet specimen is lower than that of a dry one 1,3,[7][8][9][10] and the tensile strength of rocks under saturated conditions is lower than that under dry conditions 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Pore pressure effects on strength and elasticity of ornamental stones

Khamrat¹,

Archeeploha²,

Fuenkajorn³

2016

ScienceAsia

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This experimental study determines the effects of pore pressure on the compressive strengths and elasticity of six ornamental stones. An approach to determine the pore pressure in low porosity rocks is presented. Rectangular rock specimens (50 × 50 × 100 mm 3 ) under dry and wet conditions were axially loaded under different rates from 0.001-10 MPa/s using a polyaxial load frame. The confining pressures ranged from 0 to 12 MPa. Wet granite, marl, marble, Phra Wihan sandstone, Phu Phan sandstone, and siltstone specimens have an average water content of 0.14%, 2.7%, 0.09%, 2.05%, 4.9%, and 1.5%, respectively. Compressive shear failure was observed in specimens under slow loading rate while extension failure was found in specimens under high loading rate. The strength values of the wet specimens were lower than those of the dry ones, particularly under the high confining pressure and loading rates.The strength values obtained from the dry testing were used to quantitatively calibrate the loading rate effect from the wet strengths, and hence the effect of pore pressure could be calculated. The pore pressures notably reduced the compressive strength and elastic modulus, and slightly increased Poisson's ratio of the rocks tested.

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Influence of water content on the strength of rock

Cited by 291 publications

References 4 publications

Multi-scale analysis of water alteration on the rockslope stability framework

Multi-scale analysis of water alteration on the rockslope stability framework

Influence of Aggregate Moisture Content on the Mechanical Properties of Resin Mineral Composite

Pore pressure effects on strength and elasticity of ornamental stones

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