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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.
Determine the governing effective length of a steel column? Determine the governing effective length of a W12 x 106 steel column that is 12' high, pinned at each end, and
Q. Shoes of prefabricated drains? Shoes are generally installed in prefabricated drains for the below : (i) It avoids the entry of soils in the mandrel by sealing it at the
Question In case if there is a delay of bituminous laying on top of sub-base, have to tack coat be applied on the top surface of sub-base? Answer When there is a d
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
A 16-pile group has to be arranged in the form of a square in soft clay with uniform spacing. Neglecting end-bearing, verify the optimum value of the spacing of the piles in terms
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
what is fist class brick?
property of aggregate in high strength concrete
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