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Define Sulphate Attack - underwater inspection of bridge?
Cement contains a proportion of tricalcium aluminates, which takes part in the hydration process. These can react with magnesium sulphate, which is present in concentrations of about 0.5% in seawater. The reaction is expansive, but the presence of chlorides inhibits the degree of expansion. The net result is softening and disruption of the concrete in the form of crumbling.
minimun difference in level of inlet and oulet pipe level invert in manhole
Q. Design of elastomeric bearings? The standard drawings of bridge bearings issued by RDSO are on the basis of UIC 772-R. To maintain uniformity of approach, the design of elas
What is DBM?Why use DBM where other binder courses are available?What is composition and advantages of using DBM?
Copper is a very durable material when exposed to weather and is soft enough that it can be simply molded to curved shapes like those in the Statue of Liberty. It is also tradition
Question Explain components of a typical expansion joint? Answer Dowel bar-This is major component of joint. It serves to guide direction of movement of concrete growth. Therefo
Bronze is an alloy of which materials? Answer : Bronze is an alloy of copper.
dek type bridge
Q. Explain about Viscous flow loss? Absorptive material comprises interconnected voids and pores into which sound energy will propagate. When sound waves pass throughthe materi
Define Compression - Actions in POT Bearings? Vertical load is carried through the piston of the bearing and it is resisted by the elastomeric pad. Elastomer is incompressible,
An F-16 lands on aircraft carrier and its velocity is 63 m/sn. If its decceleration is assumed to be constant and it must stop in 2.0 sec. a) What is final position of plane if i
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