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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'.
Q. Show Afflux and scour in alluvial rivers? In case of alluvial rivers, the river bed comprises scourable material like sand. Constriction of bridge waterway causes increase
distomat
FLUID substance which deforms continuously when subjected to a shear stress LIQUID no fixed shape deforms under gravity to container shape virtually incompressible = const
Question What is the sucker deck principle for changeable depth bridge decks ? Answer For a variable depth bridge deck, depth of continuous multi-span bridge deck is greater tha
tack rivet figures with connections
Calculate the Daily Standard Production Rate of Equipment An excavator with a bucket capacity of 3-yd 3 has a standard operating cycle time of 40 seconds. The daily standard p
Explain about the Pot Bearing? POT bearing was developed in 1959 as an alternative to heavy steel sliding bearings. It consists of a circular non-reinforced rubber-pad fully en
How to conclude size of elastomeric bearings ?
What is exogenous tree?
GIVE IN DETAIL THE TREATMENT OF TOP SURFACE OF EARTH FILLING..
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