Compressive strength of stone-for various stones
Hello friends, This is an important topic which also determines the strength of concrete.
For good building, stone crushing strength should be greater than 100N/mm2.
compressive strength: It is defined as the ratio of load by its cross-sectional area at which it fails.
Mathematically, compressive strength (P)= load/cross-sectional area in N/mm2
The compression strength of the stone is carried out to determine the compressive strength of the stone.
To perform this test take 6 test blocks of dimensions 10cmx10cmx10cm are taken.
These blocks are then covered with plaster of Paris subjected to load in the compression testing machine one by one.
The values of loads at which the blocks get crusted are noted for each block and the average crushing load is calculated, Let its value be P.
As we said for good building stone compressive strength should be greater than or equal to 100N/mm2.
The table here gives the compressive strength of different stones obtained from rocks in Newton per mm square.
| Rock | Stone | Range of Crushing Strength in N/mm2 |
| 1)Igneous rocks | Basalt | 150-200 |
| Diorite | 90-150 | |
| Granite | 90-120 | |
| Syenite | 90-150 | |
| Trap | 300-380 | |
| 2)Sedimentary Rocks | Laterite | 2–4 |
| Limestone | 40-90 | |
| Sandstone | 55-110 | |
| Shale | 0.30-0.80 | |
| 3)Metamorphic rocks | Gneiss | 150-200 |
| Slate | 70-200 | |
| Marble | 80-140 | |
| Soapstone | 60-100 | |
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Also read: Artificial stone