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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'.
Question If construction of concrete carriageway is carried out in summer, be capable of expansion joints be omitted? Answer If construction of concrete carriageway
Importance of Tendons in post-tensioned members Tendons in post-tensioned members are subjected to different amounts of stresses (among themselves) due to following reasons.
Factors Affecting Location Decision: Mining, quarrying and heavy manufacturing have capital intensive facilities that are costly to build and cover large area and use large q
Question Give a reason that why are high and narrow beams not desirable in concrete piers? Answer Supported on past experience in other, high and narrow beams after
What is the Pre-tensioned concrete In Pre-tensioned concrete tendons are kept stretched with suitable mechanisms and concrete is cast into the forms through which stretched ten
a pilot entering a bay on course
material which can endures vibrations and saline conditions
what are the uses of retaining wall?!
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Question Give reason that why are most marine piles circular in cross section? Answer As marine piles, there are a number of options existing for selection, name as H-
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