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# Compressive Strength Test Of Stones | Crushing Test on Stones | Stone As A Building Material | Construction Materials | Stones | By Akhand Dutta

Compressive Strength Test (Crushing Strength Test) [IS:1121 (Part 1)] Requirements:

## [IS:1121 (Part 1)]

### Requirements:

• Take samples of stones weighing at least 25 kg each.

• Specimen species should be in the form of cubes or cylinders.

• The lateral dimension or diameter should be of 50 mm at least.

• The ratio of lateral dimension or ratio of height to diameter should be 1:1.

• A minimum of three specimens should be used for testing.

#### Procedure:

• Specimen is immersed in water at 20 to 30 °C for 72 hours. (Test in saturated condition)

• Specimen is dried in an oven at 105 ± 5 °C for 24 hours. (Test in dry condition)

• Then it is cooled in a desiccator to 20 to 30 °C.

• Later, it is tested in Universal Testing Machine.

• The load is gradually applied at a rate of 14 N /sq. mm /min (14 newtons per millimetre square per minute) until the specimen breaks down.

 Universal Testing Machine

The Compressive Strength is then calculated by the formula:

$\frac{Maximum\,&space;Compressive\,&space;Load\,&space;(newtons)}{Area\,of\,bearing\,face\,(mm^{2})}$

*When the ratio of lateral dimension or ratio of height to diameter differs from unity by 25% or more then Compressive strength in Calculated by this formula:

$\frac{C_p}{0.778+0.222(\frac{b}{h})}$

here,

Cp= compressive strength of standard specimen piece

b= diameter or lateral dimension

h= height

### Revision Mind Map For Compressive Strength Test on Stone

 Revision Mind Map For Compressive Strength Test on Stone

*Self Typed

*Source- Internet, Books and Self-Analysis

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