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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'.
Advantages and Disadvantages of Water Transport: The following are the advantages of water transport: (a) Since the vessels travel on water, no investment is needed
Define Ways of providing the anti slip device - By stops? In this method stopper plates or angles are welded to the underside of the girder and embedded in the bed block. It sh
Check if the given beam and loading satisfy the AISC LRFD strength criteria. The beam section is a W 16*31 of A36 steel and it is laterally supported at the ends at the load points
Concrete Mix Design: Concrete mix design is done in a laboratory to achieve the desired strength and workability. The mix design is done to achieve strength slightly higher t
please explain about system engineering in civil
Q. Relation of pouring rate and temperature with concrete pressure on formwork Freshly placed concrete exerts pressure on formwork at the time of the placing operation. It's i
Shear stress in rectangular section formula
Define the term - Cracking Load and Proof Stress Cracking Load The load on the structural member at the time of the initiation of first visible crack in concrete is know
what is the difference between whole circle bearing and reduced bearing?
a) Certain data for the materials used in the construction of the building, e,g, insulation, building materials, air spaces, etc. b) Draw, with appropriate dimensions, the cro
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