This document discusses four laboratory tests used to evaluate the strength of rock samples: the point load test, Schmidt hammer rebound test, sonic velocity test, and triaxial compression test. It provides details on the point load test, describing the equipment needed and noting there are four methods for conducting the test depending on the specimen's size and shape, including the diametric, uniaxial, and triaxial tests. Information is also given on conducting the Schmidt hammer rebound test.

2. LABARTORY STRENGTH
INDEX TEST OF ROCK
 POINT LOAD TEST
 SCHMIDT HAMMER REBOUND TEST
 SONIC VELOCITY TEST
 TRIAXIAL COMPRESSION TEST

3. POINT LOAD STRENGTH INDEX
TEST OF ROCK
EQUIPMENTS:
 Point load strength test machine
 A 100 mm scale attached with the loading frame
 Pressure gauge (Capacity 25 kN or 50 kN)

6. Depending upon the size and shape of test
specimen, the point load strength index can
be conducted by four different methods.
These are:
1.Diametric Test
2.Uniaxial Test
3.Triaxial Test

7. DIAMETRIC TEST

8. SCHMIDT HAMMER REBOUND TEST