Predicting intact rock properties of selected sandstones using petrographic thin-section data

Zorlu, Kıvanç; Ulusay, Reşat; Ocakoğlu, Faruk; Gökçeoğlu, Candan; Sönmez, H.

doi:10.1016/j.ijrmms.2004.03.025

Cited by 42 publications

(17 citation statements)

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“…Several researchers have studied the effect of mineralogical composition (primary and secondary phases) on the engineering properties of rocks. Many of them have dealt with the influence of primary minerals, such as biotite, quartz and K-feldspar on the mechanical properties of volcanic and granitic rocks, presenting no relationships between these primary minerals of the investigated rocks and their mechanical properties [8,11,53,54], while others have studied the negative influence of weathering/alteration on the engineering behavior of the tested rocks [5,[22][23][24]55]. The generally lower hardness of the secondary minerals relative to the primary relics accompanied by new textures result in differential engineering behaviors, thus contributing to the weakness and easier deterioration of the rocks under stress and subsequently their gradually diminished in-service performance.…”

Section: Discussionmentioning

confidence: 99%

The Influence of the Mineralogical Composition of Ultramafic Rocks on Their Engineering Performance: A Case Study from the Veria-Naousa and Gerania Ophiolite Complexes (Greece)

et al. 2018

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This case study investigates the influence of the mineralogical composition of ultramafic rocks derived from two ophiolite complexes from Greece (Veria-Naousa and Gerania) on their mechanical, physical and physicochemical properties. The investigated lithologies include lherzolite, harzburgite, dunite and olivine-orthopyroxenite with variable degrees of alteration. The ratio of secondary minerals to primary minerals (SEC/PR) of the studied ultramafic rocks shows good correlations with their physical, physicochemical and mechanical properties, suggesting that alteration has a negative effect on the engineering performance of the ultramafic rocks. Among the secondary minerals, serpentine plays the most critical role in determining the moisture content, the total porosity and hence the soundness of the host rocks, due to its phyllosilicate structure, which allows more water/solutions to be captured. The high percentage of serpentine creates surfaces of weakness, and as a result, it decreases the rock strength. The low microtopography of highly serpentinized rocks results in their reduced mechanical performance.

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Section: Discussionmentioning

confidence: 99%

The Influence of the Mineralogical Composition of Ultramafic Rocks on Their Engineering Performance: A Case Study from the Veria-Naousa and Gerania Ophiolite Complexes (Greece)

et al. 2018

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“…Basic and ultrabasic rocks find a wide variety of uses as aggregates for antiskid road surfacing, concrete, railway ballast, etc. (French and Gammond, 1989;Tsikouras et al, 2005;Pomonis et al, 2007;Rigopoulos et al, 2010), whereas those of acidicintermediate composition comprise very good mortar aggregates for various uses (Miskovsky et al, 2004;Zorlu et al, 2004). Use of petrography as a tool in the assessment of aggregates quality dates back to the early part of the 20 th century (Knight and Knight, 1935;Griffiths, 1989;Rhoades and Mielenz, 1946).…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Physicomechanical Properties of Ultrabasic Rocks and Andesites From Central Macedonia (Greece)

Petrounias¹,

Rogkala²,

Kalpogiannaki³

et al. 2017

geosociety

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Petrographic, geochemical and physicomechanical features were determined and inter-correlated in two representative ultrabasic samples from the Veria-Naousa ophiolite and two Pliocenic andesite samples, occurring at the east of the above complex. Results show that mineralogical and textural features are major factors affecting the physicomechanical properties in both lithotypes. The ultrabasic rocks display higher resistance to attrition and abrasion and lower water absorption values relative to the intermediate volcanic rocks, hence the first are predicted to show better in-service engineering performance. However, the degree of serpentinisation is detrimental, as a highly serpentinised ultrabasic sample yielded poor results, analogous to the andesites, in certain laboratory tests. Ophiolite complexes in Greece are abundant and they are distributed along several mainland areas. Hence setting evaluation criteria for their quality is important as they can potentially replace limestones, which are less resistant and durable, in several environmental and industrial applications

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“…The physico-mechanical parameters of rocks mainly depend on their mineralogy, texture, degree of chemical alteration, weathering and deformation (e.g. Hartley 1974;Åkesson et al 2001;Zorlu et al 2004;Tamrakar et al 2007). Ophiolitic rocks exhibit a wide range of chemical compositions, as well as of mineralogical and textural features, thus the existence of lithotypes with variable mechanical properties is very common even in the same suite.…”

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confidence: 99%

The impact of petrographic characteristics on the engineering properties of ultrabasic rocks from northern and central Greece

Rigopoulos

Tsikouras

Pomonis

et al. 2012

QJEGH

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This paper investigates the influence of petrographic characteristics on the engineering properties of ultrabasic rocks from the Pindos, Vourinos and Koziakas ophiolites. The studied lithologies include dunites, olivine-rich harzburgites, typical harzburgites and plagioclase-bearing lherzolites. Quantitative petrographic analysis indicates that the samples display various percentages of secondary minerals. The peridotites are tested to determine the following engineering parameters: water absorption, apparent density, total porosity, point load index, Schmidt hammer value, aggregate abrasion value and polished stone value. The relationships between the petrographic features and the engineering parameters are determined using regression analysis. The micropetrographic index I rep and the ratios of secondary to primary (S e /P) and soft to hard (S o /H) minerals provide significant information about the impact of ocean-floor metamorphism on the strength and durability of peridotites. The correlations indicate that the formation of secondary minerals results in mechanically weaker rocks. The polished stone value is the only engineering parameter that is positively affected by the presence of low contents of alteration products. The results also imply that Cr-spinel grains are a major determinant for the preservation of the microroughness of aggregate particles owing to their very hard nature and different mechanical behaviour compared with the surrounding silicate minerals.2012-021r esearch-articleResearch Article45X10.1144/qjegh2012-021I. RigopoulosEngineering Properties of Ultrabasic Rocks 2012

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Predicting intact rock properties of selected sandstones using petrographic thin-section data

Cited by 42 publications

References 0 publications

The Influence of the Mineralogical Composition of Ultramafic Rocks on Their Engineering Performance: A Case Study from the Veria-Naousa and Gerania Ophiolite Complexes (Greece)

The Influence of the Mineralogical Composition of Ultramafic Rocks on Their Engineering Performance: A Case Study from the Veria-Naousa and Gerania Ophiolite Complexes (Greece)

Comparative Study of Physicomechanical Properties of Ultrabasic Rocks and Andesites From Central Macedonia (Greece)

The impact of petrographic characteristics on the engineering properties of ultrabasic rocks from northern and central Greece

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