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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'.
The loading period for a building extended from Feb., 1957 to Feb., 1959. In Feb., 1962, the average measured settlement was found to be 117 mm. The ultimate settlement was expecte
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Chain Surveying: In the chain surveying, you have studied the basics of chain surveying. In chain surveying, various equipment and instruments are used for measuring distances
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A W12x58 member, which comprises a vertical member in a truss span, is subjected to a factored axial compressive force of 163 kips. The W12x58 section is oriented such that the st
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Define Water jets for underwater inspection of bridge? These tools are widely used and produce a bright metal finish in one operation. Grit entrainment is available and makes t
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