The stress sensitivity of brittle creep in Purbeck limestone at P eff =10 MPa is illustrated in Figure 15, which is a plot of the minimum creep strain rate as a function of the imposed differential stress Q (offset by the stress at D', denoted ). Data for Darley Dale sandstone under the same conditions are also shown for comparison.

To clarify mechanical and permeability characteristics of fractured limestone in complete stress-strain process, the hydro-mechanical coupling tests on fractured limestone at various seepage ...

Water can deteriorate the compositional properties of rock through softening and dissolution. The water content rate of rock has a certain effect and can cause changes in rock properties caused by the water action. In this research, to study the effects of the water content rate on the strength and brittle plasticity of limestone, uniaxial …

The Brittle–Ductile Transition and the Formation of Compaction Bands in the Savonnières Limestone: Impact of the Stress and Pore Fluid. Original Paper. Open …

Abstract. In earthquake engineering, dynamic response of rock is a hot topic for investigating rock mechanism characteristics. In this article, limestone collected from …

In this article, limestone collected from the Hongshiyan landslide area induced by the 2014 "8.03" Ludian earthquake in southwest China is used to conduct multi-stage cyclic loading tests.

The triaxial compression test of hard brittle limestone soaked in different pH value, 0.1 mol/l, Na2SO4, CaCl2 solution and distilled water is carried out; and the effect of chemical solution on ...

Triaxial compression tests are conducted on a quasi-brittle rock, limestone. The analyses show that elastoplastic deformation is coupled with damage. Based on the experimental investigation, a ...

Cataclasis is dominant deformation mechanism in Tavel limestone at room temperature. Porosity and micritic texture are two main factors affecting this mechanism. …

An extensive uniaxial and triaxial compression testing programme was performed on Indiana Limestone to assess its behaviour across the brittle–ductile transition. Particular attention has been paid to the post-yield evolution of strength and dilatancy. Specimens tested at σ 3 = 30 MPa displayed a fully ductile failure mechanism, …

We present new mechanical characterization of the Comiso limestone of the Mount Etna Volcano (Italy) basement to constrain the effects of regional ambient conditions associated with the volcanic system: the effects of pore fluid on rock strength and the effects of distal magmatic heating (~20 °C to 600 °C) at a range of simulated depths (0.2 ...

Abstract. In earthquake engineering, dynamic response of rock is a hot topic for investigating rock mechanism characteristics. In this article, limestone collected from the Hongshiyan landslide area induced by the 2014 "8.03" Ludian earthquake in southwest China is used to conduct multi-stage cyclic loading tests. The test results show that as …

Nicolas et al. explored the brittle and semi-brittle behaviour of a 14.7% porosity, ~ calcite Tavel limestone and compared the results with CL in dry and saturated conditions, also using low in-situ temperature in an additional series of dry tests.

In this paper, several mechanical deformation curves of limestone are reviewed, and the effects of temperature, confining pressure, and fluid are discussed. Generally, Mohr–Coulomb is used for limestone brittle fracture. The characteristic of low temperature cataclastic flow and the conditions and constitutive equations of intracrystal …

Limestone is a versatile stone that can be used just about anywhere inside or outside of your home. It's a softer stone compared to other stones and can be cut into smaller sizes for tiling or even mosaic designs. The softness is nice under bare feet when it is used as flooring, but limestone tiles also look great on bathroom walls, as a ...

Download Citation | Limestone mechanical deformation behavior and failure mechanisms: a review | In this paper, several mechanical deformation curves of limestone are reviewed, and the effects of ...

A series of triaxial compression tests on dry and saturated limestone (soaked in water solutions of Na2SO4 and CaCl2 at 0.1 mol / L ionic strengths with varying pH, and distilled water for 240 days) have been carried out. The corresponding complete stress-strain curves are obtained. The influences of chemical solution on rock mechanical behaviors are …

Of particular interest for rock engineering applications is the time-dependent behaviour of brittle rocks under low-confinement conditions where extensional cracking …

Deformation and failure mode of carbonate rocks depend on the confining pressure. In this study, the mechanical behavior of a limestone with an initial porosity of 14.7% is investigated at constant stress. At confining pressures below 55 MPa, dilatancy associated with microfracturing occurs during constant stress steps, ultimately leading to failure, …

In this research, to study the effects of the water content rate on the strength and brittle plasticity of limestone, uniaxial compression tests with different water content rate states were conducted, and the form of limestone damage under different water content rate conditions was analyzed. The effects of the different water content rates on ...

Taken together with published material on the brittle-ductile transition in limestone (Brantut et al., 2014, 2018; Vajdova et al., 2004, 2012), our new data showed that in carbonate formations in the porosity range studied here, variations of both porosity and permeability associated to, for example, extraction of fluid are expected to be quite ...

Limestone. Limestone forms in shallow marine water areas. Limestone that forms this way is considered a biological sedimentary rock that is made from a combination of …

the brittle and semi-brittle behaviour of a 14.7% porosity, ~ calcite Tavel limestone and compared the results with CL in dry and saturated conditions, also using low in-situ temperature in an ...

The brittle-ductile transition and the formation of compaction bands in the Savonnières limestone: Impact of the stress and pore fluid December 2021 DOI: 10.13140/RG.2.2.23059.60966

Semantic Scholar extracted view of "Chapter 7: Transition from Brittle Fracture to Ductile Flow in Solenhofen Limestone as a Function of Temperature, Confining Pressure, and Interstitial Fluid Pressure" by H. C. Heard

Understanding of the mechanics of the brittle-ductile transition (BDT) in porous limestone is significantly more challenging than for sandstone because of the lack of consistent acoustic emission activity in limestone, meaning that one must rely on alternative techniques.

Brittle creep occurs in porous limestone; Subcritical cracking is dominant at high stress and low confining pressure; A switch in deformation mechanism is observed …

The triaxial compression test of hard brittle limestone soaked in different pH value, 0.1 mol/l, Na2SO4, CaCl2 solution and distilled water is carried out; and the effect of chemical solution on ...

In this article, limestone collected from the Hongshiyan landslide area induced by the 2014 "8.03" Ludian earthquake in southwest China is used to conduct multi-stage cyclic loading tests. The test results show that as confining pressure, loading frequency, and stress amplitude increase, the dynamic elastic modulus increases …

Brittle creep of the limestone is associated with dilatancy and the development of a shear fault at final strains lower than 2 %, as previously observed for other brittle materials. Semi-brittle creep leads to inelastic compaction accommodated by crystal plasticity and then to dilatancy likely due to the nucleation and propagation of cracks at ...