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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'.
Functions of different reinforcement in a typical pile cap Loads from columns transferring to pile cap persuade tensile forces at the bottom of cap. For example, by using trus
design of beams latteraly supported
Explain the Dynamic or Vibration Tests Tests of this type, also known as sonic integrity test, involve sub- jecting the element to a single impulsive blow or cyclic load, and
In engineering, the code-allowable withdrawal force is zero, due to the wood expands and contracts over time and the nail pullout force can decrease to zero
short note of distomat
Q. Insulating washer between steel bolts and aluminium plates? Corrosion of aluminium can be activated by putting it in contact with another metal in the presence of water. Thi
what is grillege foundation and where are use
What is Polymer Concrete?
Q. Utilisation of Buoyancy Effect? Submerged part of the substructure will be subjected to buoyancy effect. The uplift pressure from the ground water can be utilised by constru
The classification as soft wood and hard wood has commercial significance. The difference between soft wood and hard wood is described below: The color of soft wood is light
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