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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.
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
sir i want to know that which pages of IS800:2007 is used for steel design of tension member, compression member, collumn, beam, connections, trusses etc.. please give me the topic
Q. What is Rail Lubricators? 1. P & M type of lubricators - These lubricators can be used for lubrication of FF rails as well as BH rails. 2. Elgi grease pump - Elgi Bucket
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Pavement Layers And Their Functions Flexible Pavement A typical modern flexible pavement for high traffic is composed of layers as under (Figure). Figure: L
Q. Application of embankment condition for drainage design? In considering loads on buried pipeline, there are generally two scenarios: narrow trench condition and embankment (
Permissible Stresses in Steel As per the Indian code, the permissible stresses in the tendons at the time of initial prestressing should not exceed 80% of the characteristic t
How to calculate the total loss of prestress As a general guide, it may be taken that total loss of prestress may be in the range of 20 to 25 percent of the initial prestress,
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Explain the Equation for a Suppressed Rectangular Weir If the approach velocity is negligible, velocity head can be excluded and the equation becomes the Francis weir equation
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