In this article, we Describe Briefly the Characteristics of Good Stones without any extra garbage, short and clear information
Characteristics of Good Stones
Characteristics of good stones are described below
Crushing Strength
For a good building stone, the crushing strength of building stones must be greater than 100N/mm2.
Durability of Good Stones
Good building stones must be highly durable.
The durability of a construction stone is due to its chemical composition and texture.
Appearance of Good Stone
Stones must appear good as far as building work is constructed. Uniform colour in building stones is desirable.
Hardness Characteristic of Good Stones
The hardness coefficient of a good building stone must be between 14 to 17. Stones with a hardness coefficient greatness than 17 are preferred in road construction work.
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Fracture
A good building stone when fractured should show sharp, even, bright and clear grains well bonded with each other
Specific Gravity
Specific gravity should preferably be greater than 2.7 for a good building stone.
The high specific gravity of stone indicates that they are more compact and less porous. However, stones used for domes, roofs etc. should be lighter.
Texture
A compact, fine crystalline structure free from cavities, cracks and white soft patches is preferable.
Fire Resistance
The minerals present in stone should be such that they do not aid fire and also the stone is preserved in case of fire. The rapid increase in temperature due to fire, sudden cooling, variation in thermal coefficient of different minerals etc. lead to fracture of stones.
Toughness
In the impact test, a toughness index of more than 19 indicates a tough stone while a value less than 13 indicates a weak stone.
