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QuestionDesign of concrete structures, normally most aggregate sizes are adopted with scopes from 10mm to 20mm. Does an increase of most aggregate size advantage structures? AnswerTo answer this query, let's consider the example of a cube. Surface area to volume ratio of a cube is 6/b that b is the length of cube. This implies that surface area to volume ratio reduces with an increase in volume. Then, when size of maximum aggregate is improved, surface area to be soaked by water per unit volume is condensed. Consequently, water requirement of concrete mixes is reduced accordingly so water or cement ratio can be lowered, resulting in a rise in concrete power. Though, increase of aggregate size is also accompanied by effect of reduced contact areas and discontinuities formed by these larger sized particles. In general, for utmost aggregate sizes less than 40mm, effect of lower water requirement could offset drawbacks brought about by discontinuities as recommended by Longman Scientific and Technical in 1987.
differentiate between Dumpy level:The Wye or Y level:Cooke''s reversible level: Cushing''s level:Tilting level and Automatic level
Explain Chezy Manning Equation v = 1.49/n (R) 0.67 (S) 0.5 R = hydraulic radius (ft) = Area/ wetted perimeter, R = D/4 for circular channels full and one-half full
Question What is function of a sand layer underlying paving slab or interlocking blocks? Answer Normally after laying of sub-base layer of paving slab or interlocking
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A contractor is bidding a construction project that will take 12 months to complete. The terms of the bid provide that the owner will pay the Contractor one lump sum at the end of
GIS AND REMOTE SENSING
Soil pressure enhances with depth due to the overburden or self-weight of the soil and because of loads imposed upon the soil. For example, the pressure variation below the dept
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Q. Illustrate Bituminous surfacing over concrete structures? Usage of bituminous surfacing over concrete structures (for instance existing concrete roads) is widespread to impr
Define the Spalling - underwater inspection of bridge? A spall is a roughly circular or oval depression in the concrete. Corroding reinforcement can cause spalls and reinforcin
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