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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'.
Similarity between post and pre tensioned concrete In the case of pre-tensioned concrete members, a pattern of small length and small width cracks which are more in numbers
Define the Reservoirs - Hydraulic System Typically designed for multiple functions - clean water supply, creating recreational opportunities and flood protection. Reservoirs ar
charactor of fourth class brick
how do I find the design strength of concrete?
Determine the Steps for routine inspection? A routine inspection should normally include: - A Level I inspection on 100% of the underwater portion of the structure to determ
Question For a rigid pile cap with vertical piles at middle and raking piles at the sides, what is pattern of load distribution of piles in such agreement? Answer Becau
What do you understand by Pressure line If we determine the locations of resultant force at various sections of a pre-stressed beam, as in Example, we can draw a curve showing
Explain the term - Circular Prestressing This term refers to the case when tendon profile is provided in a round shape, such as in water tanks and pipes, etc.
Types and components of pavement
Calculation of deformation For calculation of deformation at some stage before the total creep is reached, it may be assumed that about half the total creep takes place in f
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