Describe briefly the characteristics of good stones?
What is good building stone?
Characteristics of good stones are as follows-
(a)Crushing strength: For a good building stone, crushing strength must be greater than 100 N/mm2.
(b) Durability: A good building stone must be durable. Durability of a stone is due to its chemical composition and texture.
(c) Appearance: Stones must appear good as far as building work is concerned. A uniform color in building stones is desirable.
(d) Hardness: The hardness coefficient of a good building stone must be in between 14-17. Stones with hardness coefficient greater than 17 are preferred in road work.
(e) Fracture: A good building stone when fractured should show a sharp, even, bright and clear grains well bonded with each other.
(f) Specific gravity: Specific gravity should preferably be greater than 2.7 for a good building stone. High specific gravity of stones indicates that they are more compact and less porous. However stones used for domes, roofs etc. should be lighter.
(g) Texture: A compact, fine crystalline structure free from cavities, cracks and white soft patches is preferable.
(h) Fire resistance: The minerals present in stone should be such that they doo not aid fire and also the stone is preserved in case of fire. Rapid increase in temperature due to fir, sudden cooling, variation in thermal coefficients of different minerals etc. lead to fracture of stones.
(i) Toughness: In impact test, a toughness index of more than 19 indicates a tough stone while a value less than 13 indicates weak stone.
some important questions-
What are the characteristics of a good building stone at site?
or,
What are the characteristics of a building?
sol-
building stones having same properties as discussed above
important thing to be noticiable is only 5% water absorbing criteria is with best building stone
thank you for visiting here
have a nice day
What is good building stone?
Characteristics of good stones are as follows-
(a)Crushing strength: For a good building stone, crushing strength must be greater than 100 N/mm2.
(b) Durability: A good building stone must be durable. Durability of a stone is due to its chemical composition and texture.
(c) Appearance: Stones must appear good as far as building work is concerned. A uniform color in building stones is desirable.
(d) Hardness: The hardness coefficient of a good building stone must be in between 14-17. Stones with hardness coefficient greater than 17 are preferred in road work.
(e) Fracture: A good building stone when fractured should show a sharp, even, bright and clear grains well bonded with each other.
(f) Specific gravity: Specific gravity should preferably be greater than 2.7 for a good building stone. High specific gravity of stones indicates that they are more compact and less porous. However stones used for domes, roofs etc. should be lighter.
(g) Texture: A compact, fine crystalline structure free from cavities, cracks and white soft patches is preferable.
(h) Fire resistance: The minerals present in stone should be such that they doo not aid fire and also the stone is preserved in case of fire. Rapid increase in temperature due to fir, sudden cooling, variation in thermal coefficients of different minerals etc. lead to fracture of stones.
(i) Toughness: In impact test, a toughness index of more than 19 indicates a tough stone while a value less than 13 indicates weak stone.
some important questions-
What are the characteristics of a good building stone at site?
or,
What are the characteristics of a building?
building stones having same properties as discussed above
important thing to be noticiable is only 5% water absorbing criteria is with best building stone
thank you for visiting here
have a nice day
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