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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.
Calculation of deformation For calculation of deformation at some stage before the total creep is reached, it may be assumed that about half the total creep takes place in f
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Question What is distinction in principle for conducting surface regularity test and sand test? Answer Purpose of surface regularity test is to assess riding quality
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Using Laplace transfom, the following differential equation d y dy dt reduces to the algebraic equation of the form Resolve y(s) into partial fractions
Question Now, mainly flap valves are ended of HDPE. What is the major compensation of using HDPE as compared with cast iron? Answer (i) It has no response with sewage a
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Q. Design a water supply scheme for new Railway colony based on the following data's. i. Requirement of Loco and domestic consumption 5 lacs gallon per day. ii. Source of wat
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