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QuestionWhat are the key problems if use pumping for concreting works?
AnswerIn pumping operation, force exerted by pumps have to overcome friction involving concrete and pumping pipes, weight of concrete and pressure head when placing concrete above pumps. In actuality, as only water is pump able, it is water in concrete that transfers force. Major problems associated with pumping are effect of isolation and bleeding. To rectify these adverse effects proportion of cement is increased to improve cohesion sequentially to decrease segregation and bleeding. On other hand, the proper selection of aggregate grading helps to get better pump capability of concrete.
Q. Evlaute width and depth for stable alluvial canals? Lacey originally evolved width and depth formulae for stable alluvial canals. These were the following. P = 4.836 Q 1
different components of all types of earth fill dam
Q. Cutting edge in well foundation? The function of cutting edge on well foundation is basically to cut through the earth which being sunk. The angle of well curb pushes the ea
Introdaction , volume batching , weighat batching , mesaring of water
functions of breast wall& scupper
Question What is the sucker deck principle for changeable depth bridge decks ? Answer For a variable depth bridge deck, depth of continuous multi-span bridge deck is greate
steps in roof design
a street light is 15 ft directly above the curb. a 6 ft man starts 10 ft down the street from the light and walks directly across the street which is 10 ft wide. when he reaches th
Classification of Timber Several bases are considered for the classification of timbers. The following are the essential basis: Mode of growth Modulus of elasticity
Classification Based on Availability: Forest departments categorized timbers based on the availability as X=Most common. 1415 m 3 or more per year Y=Common. 355 m 3 to 1415
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