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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'.
Movement accommodation factor is normally specified by manufacturers of joint sealants for designers to design dimension of joints. It is stated as the total movement that a joint
Explain RCRA and HSWA - Hazardous Waste Regulations 1. In 1976, Congress passed the Resource Conservation and Recovery Act (RCRA) and directed EPA to establish hazardous waste
Operation in chain surveying
Ask questa) In an unloaded propped cantilever, the propped end sinks vertically relative to the fixed end by an amount ? due to poor construction of the foundation of the prop. Wha
The local survey crew measures a distance of 1,135 ft of new drainage pipe that is required for the new road construction. The beginning point for the drainage is located at statio
briefly explain about c tokens ?
Ask questiPermanent Way:on #Minimum 100 words accepted#
Good evening. I have two homework projects from the Soil Mechanics. I am interesting if anybody can solve them.
Embankment Construction: Selection of Soil Soil is the material used for embankment construction, though other materials like rock and fly-ash are also used in specia
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