Determining Roughness Angle of Limestone Using Optical Laser Scanner

Year 2016, Volume: 3 Issue: 3, 57 - 75, 30.12.2016

E. Özgür Avşar , Erkan Bozkurtoğlu , Umut Aydar Dursun Zafer Şeker , Şinasi Kaya , Cem Gazioğlu

https://doi.org/10.30897/ijegeo.306482

Cited By: 3

Abstract

In this study, a limestone rock core specimen with 6.94 cm x 4.95 cm dimensions was exposed to tensile force
by Brazilian test and rough surfaces were obtained. Following the Brazilian test, roughness angles were
measured by a laser scanner along one side of the rock specimen. For this purpose, Nextengine 3D Desktop
scanner was used. The 17 profiles were studied along the width of the core with a 0.3 mm interval.
Approximately 10000 points produced for each profile, some of them are in the “+” and some are in the “-”
direction along each profile. Maximum and minimum roughness angles are calculated as 65.580 and 1.56x10-5
degree respectively. The average roughness angle value of the profiles is 13.870. The percentage of the
roughness angle between 13 and 14 degrees were 2.65% and 2.70% for “-” and “+” directions on the rock
surface, respectively. Mathematical analyses of 17 profiles showed that roughness profiles can be expressed by
21st – 30th degree polynomial equations with approximately 10-4 degree standard deviation.

Keywords

Roughness angle, limestone, image processing

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