Evaluation of Specimen Size-Effect in Sedimentary Rocks and Grain Size Effect in Concrete Specimens on Uniaxial Compressive Strength

Mohammad Darbor¹; Lohrasb Faramarzi^*1; Mostafa Sharifzadeh²; Hooman Rezaei¹

1 Dept. of Mining, Isfahan University of Technology

2 Curtin University, Australia

Doi:10.29252/ANM.8.16.57

Abstract

In rock engineering, the effect of scale on the strength and deformation properties of the rock mass is one of the most important issues. Prediction of uniaxial compressive strength in different diameters using the specimen size-effect models is valuable. To specify the application scope of the specimen size-effect models in the rock and concrete specimens, a few significant study have so far been carried out. This paper proposes a model of appropriate size-effect in sedimentary rocks and concrete specimens. Another object of this paper is discussion on the effect of specimen size and grain size on uniaxial compressive strength of rock and concrete specimens using statistical and experimental methods. The results of this study can be used for engineering designs in or on rocks and are more useful for determining of the elastic constants and compressive strength of rock.

Keywords: Specimen Size-Effect; Grain Size Effect; Uniaxial Compressive Strength; Statistical Analysis; Fracture Energy; Elastic Constants