The effect of rock components on Leeb hardness

Year 2024, Volume: 13 Issue: 4, 1336 - 1341, 15.10.2024

Mehmet Can Balcı , İsmail İnce

https://doi.org/10.28948/ngumuh.1523160

Abstract

The scope of this study is to investigate the effect of different components in the sample on Leeb hardness (HL), which has recently been widely used to predict the uniaxial compressive strength of rocks in an indirect, non-destructive, cost-effective, and practical way. For this purpose, cube-shaped samples were prepared from pyroclastic rocks consisting for the most part of volcanic glass (VG) and volcanic rock fragments (VRF). The percentage of volcanic rock fragments (VRFP) on each surface of the cube samples was determined using an image processing program (Image Pro Plus 6.0). Moreover, the HL value of each surface of the cube samples was determined. The correlation between the change in VRPF and HL value was investigated by simple regression analysis and strong coefficients of determination were found between these values. According to these correlations, it was determined that the HL value is affected by the VRF in the rock composition. As consequence, the HL test was found to be unsuitable for these types of rock.

Keywords

Image processing software, Volcanic rock fragment (VRF), Pyroclastic rock, Leeb hardness (HL)

Kayacı oluşturan bileşenlerin Leeb sertliğine etkisi

Abstract

Bu çalışmanın amacı, kayaçların tek eksenli sıkışma dayanımını dolaylı, tahribatsız, ucuz ve pratik bir şekilde tahminin etmek için son dönemde yaygın olarak kullanılan Leeb sertliğine (HL), örnek içindeki farklı bileşenlerin etkisini araştırmaktır. Bu amaçla, bileşiminde egemen olarak volkanik cam (VC) ve volkanik kayaç parçaları (VKP) içeren piroklastik kayaçtan küp şekilli örnekler hazırlanmıştır. Görüntü işleme programı (Image Pro Plus 6.0) vasıtasıyla küp örneklerin her bir yüzeyindeki volkanik kayaç parçası yüzdeleri (VKPY) belirlenmiştir. Ayrıca küp örneklerin her bir yüzeyinin HL değeri belirlenmiştir. VKPY değişimi ile HL değeri arasındaki ilişki basit regresyon analizi ile araştırılmış ve bu değerler arasında güçlü belirleme katsayıları bulunmuştur. Elde edilen bu ilişkilere göre, HL değerinin kayaç bileşiminde yer alan VKP’dan etkilendiği tespit edilmiştir. HL testinin bu tür kayaçlar için uygun olmadığı görülmüştür.

Keywords

Leeb sertliği (HL), Görüntü işleme programı, Volkanik kayaç parçası (VKP), Piroklastik kayaç

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