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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'.
What is cofferdams
CEMENT Cement is a normally used binding material in the construction. By burning a mixture of argillaceous (clay) and calcarious (calcium) material at a very high temperature
The discharge of water collected from a constant head permeameter in a period of 15 minutes is 500 ml. The internal diameter of the permeameter is 5 cm and the measured difference
Ask question #Minimum 1Make a detailed list of all constraints and requirements to the bridge design00 words accepted#
Define the In-depth inspections for Bridge? In-depth inspection is a detailed inspection of one or more members below the water level to detect any deficiencies not readily app
Loss of prestress due to elastic shortening At the transfer of prestress, tensile stresses of tendons are transferred to concretc in the form of compressive stresses. Due to t
how is total station used?
Maximum shear stress: The state of stress at a critical point of a strained solid is given by σ x = 70 kN/mm 2 , σ y = - 50 kN/mm 2 and τ xy = 45 kN/mm 2 . If the strength
what is sheer stress on triangle beam.
Explain the Normal Depth Equation The equation is derived from the Chezy-Manning equation. As written below it determines the diameter of a circular storm or sanitary sewer wh
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