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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.
For the shear building shown, determine the natural frequencies (RAD/SEC) and the modal matrix. Also, sketch the deflected buildings in their normal modes using the top floor as th
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find out the interior angleS with diagrame LINE AB, BC, CD, DE, EA Fore bearing 60''30" , 122'' , 46'' , 205''30" , 300''
What would be the best way to evaluate the field performance benefits of subsurface drainage in a flexible pavement? Short term and long term, thick or thin HMA..
Rolling - Binder: The layer thickness is 40-50 mm. Rolling is done in three stages : Initial Rolling By 80-100 kN smooth wheeled roller. Intermediate Rolling B
Example : Line AB was drawn with a magnetic bearing of 136° 45′ while the magnetic declination was 2° 30′ east In an old map. If magnetic declination is 3° 30′ west to what m
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Determine the stage of Cracking moment of pre-stress At the stage of transfer of pre-stress in the pre-stressed beam element, only the pre-stressing force and the self weight
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