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An elastomer is a polymeric substance obtained after vulcanization of rubber. Vulcanization is the process of improving the properties of rubber by heating with sulphur. A normal rubber is not useable as it becomes brittle at low temperature and sticky at high temperature. Charles Goodyear had been trying to 'cure' the rubber so that it could be used in all seasons. He tried to mix all kinds of things such as ink, black pepper, cheese and what not. But he couldn't succeed until he dropped a piece of rubber on stove accidentally.
To his surprise, he found that instead of melting the rubber piece hardened and remained pliable. It was found in the lab that it contained traces of sulphur. Goodyear perfected the process and named it 'vulcanization' after the Roman God of fire, 'Vulcan'.
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A city is trying to decide which of two traffic devices to install. Device A costs $1000 and has useful life of five years. Device A can be expected to result in $300 savings annu
in direct pumping system
Q. Corner reinforcement for concrete pavement? Let's consider a panel of concrete slab without any load transferring devices at it edges. When concrete panel is subjected to tr
a 45 cm deep roof beam is provided on 30 cm wall of a room size 3.0m*5.0m . calculate the quantity of steel required in beam on percentage basis.
Resultant Force on a Given Area of a Vertical Plane The resultant force is calculated from the average pressure: R = (AVERAGE Ρ)(A)
Define rocks,types of rock,rock formations
Q. Function of waterproof (or separation) membrane for concrete carriageway A layer of waterproof (or separation) membrane is usually placed between sub-base and concrete slab
Question Is it necessary that stiff or soft fenders be designed for berthing in piers? Answer Elasticity of fenders is related to ability to release stored energy duri
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