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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'.
m25 mix water cement ratio
Q. Colebrook White formula suitable for shallow gradient of pipes? Manning's Equation is commonly used for rough turbulent flow while Colebrook-White Equation is adopted for t
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Sir how can we find location of neutral axis for a curved beam of circular cross section,,,
What is the smallest size of A325 bolts required for the two plates in tension noted below, assuming the thickness of each plate is 1.0-in. and the applied force at each end is P=2
Q. Pulverized fly ash as cement replacement? Pulverized fly ash is a type of pozzolans. It is analuminous or siliceous material that possesses no binding ability by itself. Whe
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evaluate limsin3theta over theta
Define Dual frequency and colour fathometer - Sounding/Sensing Devices? Dual Frequency and Colour Fathometers can be used to detect refill in the scoured area since more than o
Compression Members: Compression members in steel need special care in design. Steel possesses high strength in tension/compression; hence the sections are generally small com
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