Advances in the understanding of the role of degree of saturation and water distribution in mechanical behaviour of calcarenites using magnetic resonance imaging technique

Rabat, Álvaro; Tomás, Roberto; Cano, Miguel

doi:10.1016/j.conbuildmat.2021.124420

Cited by 26 publications

(4 citation statements)

References 83 publications

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“…Porous structures are exposed to different environmental factors (relative humidity and water permeability) throughout their lifetime and cracks can occur as a result of the deterioration of intergranular bonds in the rock under the effect of water pressure. As a result, the mechanical properties of the rocks decreases and their strength decreases in time [35][36][37][38].…”

Section: Pore Size Distribution (Mip) Of Travertinesmentioning

confidence: 99%

Investigation of Pore and Filling Material Bond in Filled Travertine Used as a Building Material

Çetintaş

2022

Period. Polytech. Civil Eng.

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Pores, voids, and cracks reduce the strength and economic value of travertine and limits its use. When used as a building material, travertine is often filled to increase its strength and extend its service life. The present experimental study investigates the bond between the pore filler in cement-based filling materials and travertine. For the purpose of the study, five travertine samples were filled with a cement-based filling material. A polarized microscope was used for the mineralogical-petrographic characterization of the travertines, while an image analysis software program (CLEMEX) was used to determine pore size and the number of travertines. A mercury intrusion porosimetry (MIP) technique was used to determine the size and the distribution of pores in the travertine, while the pore filling was identified and characterized using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The pore structure, the bonding of the filler with the pore and the filler performance were then discussed. There was no gap between the pore filling and the Noche travertine sample. The best pore-fill-travertine bond was formed. An opening at the border of the pore filling and the travertine was visible in the Yellow travertine sample. Shrinkages and collapses were noted in the applied filling process, and filing shrinkage was also noted in the Red, Silver and Light travertine samples, preventing the establishment of a healthy connection between the pore filling and the travertine.

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Section: Pore Size Distribution (Mip) Of Travertinesmentioning

confidence: 99%

Investigation of Pore and Filling Material Bond in Filled Travertine Used as a Building Material

Çetintaş

2022

Period. Polytech. Civil Eng.

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“…Changes in the strength of sedimentary rocks with the variation in the water content have been extensively researched (Hawkins and McConell 1992;Silva et al 2008; Shakoor and Barefield 2009; Rabat et al 2021). As an example of a disaster caused by a decrease in strength due to water content, large-scale slope failures occurred in Japan due to the penetration of water into deep sedimentary rock because of heavy rainfall (Chigira 2015).…”

Section: Introductionmentioning

confidence: 99%

Strength properties and water retention curve of unsaturated Berea sandstone during drying

Togashi,

Kosunago,

Osada

et al. 2024

Preprint

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A decrease in rock strength due to water content increase and water transfer in them must be considering while discussing the deformation of rock slopes and tunnels.A water retention curve is necessary to describe the strength properties and water transport for unsaturated rocks.Although the wetting curve can be obtained through mercury intrusion porosimetry test, generating the drying curve is difficult owing to the large suction. It is preferable to be able to identify the drying suctions in other ways.In this study, strength changes of Berea sandstone during drying due to water content change are shown,and a method for obtaining the water retention drying curve using strengths is presented. The degree of saturation in the specimens for both tests was was adjusted during the drying process by air drying in our laboratory room.The Mohr--Coulomb failure criteria were then obtained from the Brazilian and uniaxial compression test results. The results demonstrated that the shear resistance angle was almost constant regardless of the water content (degree of saturation), and only the cohesion decreased with increase in water content.Since this indicates the change in mean stress (suction) due to water content changes, suction can be identified from the Brazilian and uniaxial compression tests.Furthermore, Bayesian estimation of the van Genuchten parameters was performed using the suction determined by mean stress changes detected by series of loading tests. As expected, the obtained drying curve was larger than the wetting curve obtained by mercury intrusion porosimetry test.

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“…They have demonstrated that uniaxial compressive strength (UCS), compressive Young's modulus (E c ) and shear strength parameters of sedimentary rocks can be significantly reduced after their full and partial water saturation (e.g. Hawkins and McConnell, 1992;Vásárhelyi, 2005;Erguler and Ulusay, 2009;Shakoor and Barefield, 2009;Kim and Changani, 2016;Rabat et al, 2020aRabat et al, , 2020bRabat et al, , 2020cRabat et al, , 2021. However, the mechanical response of these geomaterials under tensile stress and its water-induced variation have been poorly analysed due to the difficulties in tensile testing (Briševac et al, 2015;Hashiba and Fukui, 2015;Okubo and Fukui, 1996).…”

Section: Introductionmentioning

confidence: 99%

Assessing water-induced changes in tensile behaviour of porous limestones by means of uniaxial direct pull test and indirect methods

Rabat

Tomás

Cano

2023

Engineering Geology

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Advances in the understanding of the role of degree of saturation and water distribution in mechanical behaviour of calcarenites using magnetic resonance imaging technique

Cited by 26 publications

References 83 publications

Investigation of Pore and Filling Material Bond in Filled Travertine Used as a Building Material

Investigation of Pore and Filling Material Bond in Filled Travertine Used as a Building Material

Strength properties and water retention curve of unsaturated Berea sandstone during drying

Assessing water-induced changes in tensile behaviour of porous limestones by means of uniaxial direct pull test and indirect methods

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