The pH effect of sulfuric acid on the physico-mechanical properties of Atashkuh travertine, Central Iran

Parvizpour, Shahla; Jamshidi, Amin; Sarikhani, Ramin; Dehnavi, Artimes Ghassemi

doi:10.1007/s12665-022-10282-3

Cited by 8 publications

(4 citation statements)

References 18 publications

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“…As a result, the stone surface was chemically and physically eroded, causing some weathering patterns that resulted in weight loss. These results are consistent with those reported by other authors [27,76].…”

Section: Acid Attack (A-a)supporting

confidence: 94%

“…On the other hand, acidic environments also affect the durability of travertines due to their carbonated nature [27]. Previous studies of Iranian onyx-travertines have shown that this stone type has a lower effective porosity and higher mechanical properties, such as Brazilian Tensile Strength (BTS), Point Load Strength Index (PLSI) and P-wave Velocity, in comparison to other lithotypes.…”

Section: Introductionmentioning

confidence: 99%

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The quantification of physico-mechanical properties and durability of onyx-travertines from Santa Ana de los Ríos de Cuenca, Ecuador

et al. 2022

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In this study, physico-mechanical properties and durability of 4 onyx-travertines from Sinincay (Ecuador) were investigated. These onyx-travertines are commonly used for decorative purposes in buildings in the Historic Center of Santa Ana de los Ríos de Cuenca. The aim of this work was to characterize these stones and determine the variation of their physico-mechanical properties, such as mass loss and water absorption, after being subjected to four durability tests: salt crystallization (S-C), freeze–thaw (F-T), thermal shock (T-S) and acid attack (A-A). In addition, Scanning Electron Microscopic (SEM) analyses were carried out to record weathering patterns and understand the deterioration mechanism. Results show that these stones’ sedimentary structure is stratified. Two specimens exhibit geometrical features consistent with porous laminated facies and the remaining two have slightly porous cryptolaminated ones. Facies’ structure orientation is also found to determine mechanical strength, exhibiting the normal to lamination orientation the lowest value. As for durability, the statistical interpretation of the results suggests that the level of severity of each test follows S-C > F–T > A-A > T-S. In addition, laminated facies are more vulnerable to accelerated aging tests. Impact of S-C, F–T and T-S tests is mainly explained by differences in porosity and damage produced by A-A is related to the available effective area for the reaction to take place. Thus, the onyx-travertine is more than a wonderful material, it represents an interesting case study for development of future research on heritage stone in Ecuador and the world by employing normalized tests that are rarely used or published.

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Section: Acid Attack (A-a)supporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

The quantification of physico-mechanical properties and durability of onyx-travertines from Santa Ana de los Ríos de Cuenca, Ecuador

et al. 2022

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“…The threshold value depends mainly on the conditions under which the internal constituents of the sandstone react with the ions and other substances inside the solution. The trend of decrease in tensile strength during corrosion in acidic and alkaline solutions is in agreement with the results of Parvizpour et al [41], Dubey and Singh [42] and Fu et al [43]. Overall, the reduction in intensity under acidic conditions was greater than that under alkaline conditions.…”

Section: Analysis Of Tensile Mechanical Parameters (1) Tensile Strengthsupporting

confidence: 90%

Investigation of the Degradation Mechanism of the Tensile Mechanical Properties of Sandstone under the Corrosion of Various pH Solutions

Huang,

Lin,

Cao

et al. 2023

Materials

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The research aimed to examine the impact of different pH solutions on the tensile mechanical properties of saturated and natural sandstone specimens. The study utilized the WHY-300/10 microcomputer-controlled pressure testing machine to conduct Brazil splitting tests and employed acoustic emission and local dynamic strain testing techniques. The results indicated the tensile strength and split tensile modulus of the sandstone specimens gradually decreased with the polarisation of the solution pH, and the acoustic emission signal ring number monitoring values showed an increasing trend. The pH of the soaking solution followed an exponential decay pattern over time, eventually tending towards weak alkalinity. A new damage variable based on the cumulative ring count after chemical corrosion was defined to indirectly analyze the degree of corrosion degradation. It was discovered that in acidic or alkaline environments, the internal crystals of the rock are dissolved, weakening the mineral interconnections and causing a deterioration in tensile stress and strength. These findings can provide valuable insights for ensuring the safety and stability of the Denglou Mountain Tunnel in Yunnan Province.

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“…Peng 20 analyzed the impact of chemical corrosion on I-type fracture toughness of sandstone using a semicircular bending test, finding that I-type fracture toughness of sandstone initially increased and then gradually decreased with the increase of pH. Parvizpour 21 studied on the pH effect of sulfuric acid on the physico-mechanical properties of travertine, and found it can affect the physico-mechanical properties of stones and decrease their durability over time. Moghadis 22 studied on the dissolution and degradation of building stones in sulfuric and nitric acids solutions, and found that the stones with non-carbonate composition are resistant against these acids, while the carbonate ones are not.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on compressive strength deterioration of coal seam floor sandstone under the action of acidic mine drainage

Han,

Chen,

Liu

et al. 2024

Sci Rep

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In sulphur-coal symbiotic coal seams, after the mining of sulphide iron ore, when the coal resources are mined, the mine water accumulated in the roadway mining area will have a certain impact on the stability of the surrounding rock of the coal seam roadway. Taking the floor sandstone of sulfur coal symbiotic coal seam as the research object, the roof fissure water with pH values of 7.48, 4.81 and 2.62 was used as the experimental solution. 10 experimental schemes were designed to measure the compressive strength of the samples under the action of AMD, and the hydrochemical analysis of AMD was conducted. The pore structures of the samples before and after the action of AMD were analyzed. Based on the hydrochemistry and pore structure, the deterioration mechanism of compressive strength of the coal seam floor sandstone under the action of AMD was explained. The results indicated that the compressive strength of the samples decreased with the increasing action time of AMD. The compressive strength decreased with the increment of the porosity. The concentration of H+ ion in AMD was relatively small. Na2O in albite dissolved and reacted with water, leading to an increase in the concentration of Na+ ion. Soluble substances such as MgCl2 and CaSO4 in the pore structure dissolved, leading to an increase in the concentration of Ca2+ and Mg2+ ions. The dissolution of soluble substances and the physical–chemical reactions between solutions and minerals were the essential causes of the continuous deterioration of the compressive strength of the coal seam floor sandstone. The results of this study can provide a theoretical basis for the deterioration of the mechanical properties of the peripheral rock in the roadway of the sulphur coal seam, and can also provide a certain engineering reference for the sulphur coal seam roadway.

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The pH effect of sulfuric acid on the physico-mechanical properties of Atashkuh travertine, Central Iran

Cited by 8 publications

References 18 publications

The quantification of physico-mechanical properties and durability of onyx-travertines from Santa Ana de los Ríos de Cuenca, Ecuador

The quantification of physico-mechanical properties and durability of onyx-travertines from Santa Ana de los Ríos de Cuenca, Ecuador

Investigation of the Degradation Mechanism of the Tensile Mechanical Properties of Sandstone under the Corrosion of Various pH Solutions

Experimental research on compressive strength deterioration of coal seam floor sandstone under the action of acidic mine drainage

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