What is point load test on rock?
The Point load test is an index test by which the rock is classified according to the strength. The test can be used to estimate other characteristics of intact rocks with which it correlates, such as uniaxial compressive and tensile strength.
How do you conduct a point load test?
Measure the distance between two platen contact points (D) with the help of the scale attached with the loading frame. Measure the specimen width (W) which is equal to the diameter of the core specimen (i.e. d). Apply load to the core specimen such that failure occur within 10-60 sec. record the failure load ‘P’.
What is point load?
Point Load (P) Point load (P) is a force applied at a single infinitismal point at a set distance from the ends of the beam. Return to Calculator. Uniform Distributed Load (q) Uniform distributed load (q) is a force applied over an area, denoted by q which is force per unit length.
What is UCS in rocks?
The definition of UCS is “unconfined compressive rock strength,” that is, the rock strength measured with zero confining pressure.
Is code for UCS of rock?
IS 9143
IS 9143: Method for the determination of unconfined compressive strength of rock materials.
What is a point load?
Point load (P) is a force applied at a single infinitismal point at a set distance from the ends of the beam. Return to Calculator. Uniform Distributed Load (q) Uniform distributed load (q) is a force applied over an area, denoted by q which is force per unit length.
What is the corrected mean value of point load strength index IS50?
The corrected mean value of the point load strength index Is50 is reported in Mpa. 2. Axial Test The axial test is conducted on rock core sample of small length. Minimum of 10 test specimens are required to find out the average value of point load strength index.
How do you calculate point load strength index?
Point load strength index ( Is) = (P*1000)/D2 Mpa. Where P is breaking load in kN. D is the distance between platens in mm. Corresponding point load strength index for the standard core size of 50 mm ( Is50) diameter is given by the following equation. Is50 = (P*1000)/ (D1.5√50) MPa.
What are the different types of point load strength tests?
The International Society of Rock Mechanics (ISRM, 1985) has established the basic procedures for testing and calculation of the point load strength index. There are three basic types of point load tests: axial, diametral, and block or lump. The axial and diametral tests are conducted on rock core samples.