Ghaleh-khargushi rhyodacite and Gorid andesite from Iran: characterization, uses, and durability

Zalooli, Ahmad; Freire-Lista, David Martín; Khamehchiyan, Mashalah; Nikudel, Mohammad Reza; Fort, Rafael; Ghasemi, Shahram

doi:10.1007/s12665-018-7485-4

Cited by 26 publications

(7 citation statements)

References 69 publications

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“…5) according to the level of weathering. Similar results were measured on other andesite lithotypes (Zalooli et al 2018); Fener and İnce (2015) detected 24% strength reduction after 30 F-T cycles, and Yavuz 2011detected 8% after 30 and 13% after 50 cycles. The highest uniaxial compressive strength and modulus of elasticity values were measured in the case of andesite-9 ( Figs.…”

Section: Resultssupporting

confidence: 78%

Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment

Czinder

Török

2020

Bull Eng Geol Environ

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Aggregates are necessary materials for the construction industry. Owing to their favourable properties, andesites are frequently used rock materials; hence, the investigation of their mechanical and aggregate properties has great significance. This paper introduces the analyses of 13 Hungarian andesite lithotypes. The samples were collected from six andesite quarries in Hungary. Cylindrical specimens and aggregate samples with 10.0/14.0-mm-sized grains were made from rock blocks. The specimens were tested in dry, water-saturated and freeze–thaw subjected conditions. Bulk density, uniaxial compressive strength, modulus of elasticity, indirect tensile strength and water absorption were measured. The abrasion resistance was tested by micro-Deval tests. The flakiness indexes of the samples were also measured. The data set of the laboratory test results provided input for further, one- and two-variable statistical analyses. According to the test results, there is no significant difference between the strength parameters measured in water-saturated and in freeze–thaw subjected conditions. The correlation and regression analyses revealed relationships between some rock mechanical parameters, as well as between micro-Deval coefficient and uniaxial compressive strength.

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Section: Resultssupporting

confidence: 78%

Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment

Czinder

Török

2020

Bull Eng Geol Environ

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“…Explanations joining mechanical strength and bulk properties of the pore system, such as porosity, water absorption, and capillarity coefficient, with higher values of microporosity have been presented for higher susceptibility to salt crystallization of travertines [81] and pyroclastic rocks, with the variations in this last study being related to welding degree [43]. A comparison of rhyodacite and andesite found the former more susceptible than andesite because of the lower strength, higher porosity, and also higher microporosity [58]. Similar results were obtained in studies of freeze-thaw tests with travertines and limestones [41].…”

Section: Multiple Factorsmentioning

confidence: 75%

Rock Features and Alteration of Stone Materials Used for the Built Environment: A Review of Recent Publications on Ageing Tests

2020

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This work presents a review of recent publications, with publication date between 2017 and 2019, with information on the relation between rock characteristics and the effects of diverse agents associated with alteration of stone materials in the built environment. It considers information obtained from ageing tests performed under laboratory conditions and by exposure to outdoor agents. Several lithological groups were considered, with sedimentary carbonate rocks being the most frequently studied lithotypes and silicate metamorphic rocks being the group with scarcer information. In terms of ageing tests, salt weathering was the most frequent one while there was a noticeable lesser amount of information from tests with biological colonization. The collected data showed the influence of diverse features, from specific minerals to whole-rock properties and the presence of heterogeneities. These information are discussed in the context of formulating a general framework for stone decay.

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“…Weight loss occurs when the stress induced by salt crystallization exceeds the cohesion threshold of the stone. When crystallization pressure is insufficient to reach the cohesion threshold, there is no grain loss, although other deterioration processes such as development and enlargement of microcracks may have occurred (Benavente et al 2007;Zalooli et al 2018a). Uniaxial compression strength and Brazilian tensile strength reflect these cohesive forces at a macroscopic scale.…”

Section: Discussionmentioning

confidence: 99%

“…Different microscopic approaches have been utilized to characterize decay in building stones, including optical, polarized and fluorescence microscopies, scanning electron microscopy (SEM), and confocal scanning laser microscopy (CSLM). These techniques provide clear evidence of the decay processes in the stones and the area where the decay is taking place (Benavente et al 1999;Siedel and Siegesmund 2014;Zalooli et al 2018a).…”

Section: Introductionmentioning

confidence: 99%

Artificial microcracking of granites subjected to salt crystallization aging test

Zalooli

Khamehchiyan

Nikudel

et al. 2020

Bull Eng Geol Environ

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Salt crystallization-induced decay of Vardavard granodiorite and Shirkouh monzogranite, two Iranian building stones, were assessed with two non-destructive methods: saturation-buoyancy technique and P-and S-wave velocity measurement. Moreover, polarized and fluorescence microscopy studies were used to evaluate the behavior of the studied stones at microscopic scale against a salt crystallization aging test. The aging test extended pre-existing microcracks and generated new ones. Intracrystalline microcracking was the most predominant microcrack type for both samples. Fine-grained Vardavard granodiorite experienced higher intercrystalline microcracking than coarse-grained Shirkouh monzogranite. The microcracking mechanism of feldspars substantially depends on their alteration degree and microstructural precursors. When a growing microcrack reaches a biotite, it propagates within the crystal if the growing microcrack coincides with the cleavage plane; otherwise, it propagates as an intercrystalline one. The increase in maximum microcrack length of the samples was higher than the increase in their mean microcrack length. Low-strength Vardavard granodiorite showed higher microcrack width after the aging test. Dry weight loss in low-strength Vardavard granodiorite was more pronounced than in high-strength Shirkouh monzogranite. Dry unit weight decreased at a higher rate than saturated unit weight with the increase of effective porosity. The reduction in ultrasonic wave velocities and the increment in effective porosity and water absorption were more pronounced for Vardavard granodiorite, indicating a higher degree of decay, i.e., higher microcrack generation, enlargement, and widening. Shirkouh monzogranite, which has large-sized crystals and pores, wider initial microcracks, high tensile strength, and low effective porosity and microcrack density, was more durable than Vardavard granodiorite.

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Ghaleh-khargushi rhyodacite and Gorid andesite from Iran: characterization, uses, and durability

Cited by 26 publications

References 69 publications

Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment

Strength and abrasive properties of andesite: relationships between strength parameters measured on cylindrical test specimens and micro-Deval values—a tool for durability assessment

Rock Features and Alteration of Stone Materials Used for the Built Environment: A Review of Recent Publications on Ageing Tests

Artificial microcracking of granites subjected to salt crystallization aging test

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