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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.
Define Dupuit Equations for Unconfined Aquifers Using natural log: Q = ΠK((h 2 ) 2 - (h 1 ) 2 )/ln(r 2 /r 1 ) Using log 10 : Q = K((h 2 ) 2 - (h 1 ) 2 )/((1,055)l
Durability requirements for Concrete Even though the alkaline environment of concrete protects steel, carbonation of hydrated cement may decrease the effective protection. The
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Q. Fixed vs pinned connection between piles and pile caps? The type of connection amid piles and pile caps affects the load carrying capacity of pile groups. Fixity of pile hea
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Q- What is the difference between painting, polishing and varnishing as for as woodwork is concerned? What are their advantages and disadvantage? Ans. - Painting - P
IS CODES FOR BUILDING MATERIALS AND CONSTRUCTION The following is the list of some of the IS code giving requirements for building materials: IS 269-1989. Specification for ord
Riveted and Welded Joints: This theory deals with riveted and welded connections. In riveted connections, you have learnt different types of rivet and various parameters perta
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