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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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How to calculate the centroid of parabola?
State the term - Post-tensioned concrete In Post-tensioned concrete construction, as shown in Figure, tendons are placed inside concrete and stretched after concrete has attai
Q- What are loads and forces taken into account for designing a pile and what is load carrying capacity of a pile. Ans. For designing a pile the following loads and force ar
Basic Considerations Governing Selection of Road Alignment: The following considerations shall be kept in view in selecting the road alignment: Roads in Plain Areas (a)
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Explain Flocculation Most important factor effecting particle removal efficiency objective - to bring particles into contact so that they will collide, stick together
Quality Control in Flexible Pavements: The quality control needed for Flexible Pavements covers the following tests : (a) Density and Moisture content of sub-grade. (b)
Economic span
As the term implies, "Modulus of Elasticity" shows to the elasticity or "flexibility" of a material. The value of modulus of elasticity is very much important relating to deflectio
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