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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.
Q. What is Activated Sludge process? The term Activated Sludge is used to indicate the sludge which is obtained by settling sewage in presence of abundant oxygen. The Activated
Spalling reinforcement for pre stressing works in anchor blocks Reinforcement of anchor blocks in prestressing works usuallycomprises equilibrium reinforcement, bursting reinfo
Q. Time to remove formwork to cater for early thermal movement? Let's take a circular column as an illustration to explain effect of internal restraint to thick sections. W
a simply supported beam with concentric load
What are the advantages and disadvantages of accessible exploration? Discuss. Explain (a) Wash boring, (b) Split spoon sampler. Write a short note on the precautions to be ta
You wish to buy a house and you can afford to make a down payment of $50,000. Your monthly mortgage payment cannot exceed $2,000. If 30-year loans are available at 7.5% annual inte
Define Advantages and disadvantages Black & White Fathometer? Advantages of the black & white Fathometer are: - Inexpensive - Effective Disadvantages include the follo
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determine the cross section of a rectangular beam of uniformly strength for a simply supported beam of 6m span subjected to central concentrated load of 20kN a)by keeping depth of
Difinaction of stair
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