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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'.
Traffic Surveys: The following traffic surveys are needed for preparing a good road project: Classified Volume Counts This survey is normally carried out for 7 days,
Explain the Suppressed Rectangular Weir If the length of the weir (b) equals the width of the channel, i.e., the flow is not "contracted".
what is the permissible limit of sand
Write definition of the following - (i) Afflux. ( ii ) Free Board. ( iii ) Clearance. ( iv ) Via duct. ( v ) Skew Bridge ( vi ) Cause Way. ( vii ) Clear Span. ( v
Description of paint
Define Surface Cleaning Tools for Underwater Inspection of Bridge? To perform a thorough inspection, the marine growth on the structure must be removed. This can be done by var
WHAT IS RCC
explain the term
give the two aspects of honesty& explain
Calculate the weight of the soil. Go to the first screen. 1. Establish the geometry of the member that you want to design. 2. Each member has to be designed separately.
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