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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.
Question If construction of concrete carriageway is carried out in summer, be capable of expansion joints be omitted? Answer If construction of concrete carriageway
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Landslides: Landslides are common in the Himalayan hill roads. The main causes contributing to landslides are: (a) Removal of lateral support at the bottom of a hill due t
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Define the Frame Column Analysis 1. Based on if a column section is a braced frame or unbraced frame. 2. Braced frame-indicates buckling mode shape does not involve tr
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Question What is key disparity between working stress approach and limit state approach ? Answer Working stress approach, service loads are used in whole plan and st
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