# Tensile Strength Test of Stones | Crushing Test of Stones | Stones | Construction Materials | By Ashutosh Nautiyal and Akhand Dutta

A testing machine of sufficient capacity for the tests and capable of applying load at the specified rate should be used. Take three cylindrical test pieces of diameter greater than or equal to 50 mm.

## Tensile Strength Test of Stones (IS: 1121 (Part III))

 Stones

### Requirements:-

• A testing machine of sufficient capacity for the tests and capable of applying load at the specified rate should be used.

• Take three cylindrical test pieces of diameter greater than or equal to 50 mm.

•  The ratio of diameter to height should be 1:2 for the test pieces.

• The testing machine should be equipped with two steel plates of width 25 mm, thickness 10 mm and length equal to the length of the test piece.

### Procedure:-

• These test pieces are used to determine the tensile strength of the stone in each saturated(immersed in water at 20 to 30°C for 3 days) and dry condition(dried in an oven at 105±5°C for 24 hours and cooled in a desiccator to 20 to 30°C room temperature).

• Each test piece to be tested is sandwiched between two steel plates of the dimensions mentioned above.

• Now, the load is applied without shock and increased continuously at a uniform rate until the specimen splits and no greater load is sustained by it.

 Image From Book By S.K. Duggal

• Then, the maximum load applied to the specimen is recorded.

• Finally, the Split Tensile Strength(S) of the stone under observation is calculated by using the formula specified below:-

 Split Tensile Strength

where S=split tensile strength (N/mm2)

d=diameter of specimen(mm)

L=length of specimen(mm)

• The average of three results separately for each condition should be recorded as the split tensile strength of the sample.

### Precaution:-

• In any case, if any test piece gives a value of as much as 15% below the average, it should be examined for defects and if found defective the test piece should be rejected.

 Mind Map for Tensile Strenght test on stones

*Self Typed
*Source- Internet, Books, Self-Analysis

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