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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.
Explain Statically Indeterminate Structures Fall into two categories: 1. Beam problems with additional supports/restraints 2. Axial bar members subjected
Question Why is slump specified in concrete carriageway comparatively low like 30mmwhen compared with normal concrete like 75mm? Answer Slump of concrete carriageway
a=6inch,b=4inch
flow chart for wet process
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JETTIES: A jetty is a structure projecting into the sea from the shore line for receiving ships. They are made of RCC trestles with a deck to accommodate railway track and roa
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Q. Lifting of girders? Lifting of girders : For greasing the bearings girders are required to be lifted. But the gap between the bottom flange of plate girders and the bed bloc
Q. A pipe or groups of bars be adopted as load carrying element of min-piles? The design of mini-piles someway differs from other traditional pile types. For example the design
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