#TITLE_ALTERNATIVE#

• Main Author: (NIM 121 04 087), NADIROH
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/12450
• Institution: Institut Teknologi Bandung

Multistage triaxial test is one of the most important test in rock mechanic in order to obtain information about mechanical properties of rock, i.e. strength anvelope, shear strength, internal friction angle, and cohesion. As rock mechanic develop, triaxial test is able to be conducted either in conventional way or multistage.<p> <br /> <br /> <br /> Multistage triaxial test has been proved more efficient than the conventional one. This kind of test has been performed by some bachelors from Mining Departement ITB (Budiman, 2007; Prasetyo, Vananda, Rachmawan, Anindita, 2008) using loading control in determining termination point. To develop new method regarding multistage triaxial tets, in this research, it has conducted a triaxial test together with ultrasonic measurement. This is to evaluate ultrasonic velocity in determining the termination point for each stage of confining pressure. Then, result from multistage triaxial test compared with the conventional one.<p> <br /> <br /> <br /> Based on analysis of data from the test using chrystal tuff sample, in general prove that ultrasonic velocity is good control method in determining termination point of multistage triaxial test, yet it need to read the travel time of ultrasonic wave more accurately. The strength value of multistage triaxial test is below the strength of the conventional one. The rock failure criteria used in this research is Mohr-Coulomb, Bieniawski I&II, and Hoel-Brown criteria.