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Information Journal Paper

Title

THE NEW EMPIRICAL FORMULA TO ESTIMATE THE UNIAXIAL COMPRESSIVE STRENGTH OF LIMESTONE; NORTH OF SAVEH A CASE STUDY

Pages

  159-180

Abstract

UNIAXIAL COMPRESSIVE STRENGTH is one of the most important features to describe the resistive behavior of rocks which is used as an important parameter in the design of structures especially underground openings. The determination of this parameter using direct methods such as ordinary UNIAXIAL COMPRESSIVE STRENGTH tests is costly and time consuming, and also sometimes preparation of standard samples in many rocks is difficult. In such cases, the implementation of the simple non-destructive tests and using empirical relations can increase the evaluation speed and reduce costs. These relations even regional or local (for example within a geological formation or a single lithology) can help in the estimation of these parameters in order to be used in geotechnical projects. In this study, samples of existing LIMESTONEs in north of Saveh were prepared and UNIAXIAL COMPRESSIVE STRENGTH, POINT LOAD, SCHMIDT HAMMER and SHEAR WAVE VELOCITY tests have been performed. Then, by the statistical evaluations of the results, the empirical relations between UNIAXIAL COMPRESSIVE STRENGTH and the results of other tests have been obtained. Finally, to evaluate derived relations, they have been compared with the same relations.The comparison between the predicted and observed values of UNIAXIAL COMPRESSIVE STRENGTH represents the validity of obtained empirical relations. The application of the proposed relations for LIMESTONEs in the study area and those with similar geological conditions will provide acceptable results.

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