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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 the Perception Reaction Time A significant variable in the successful processing and use of information is the speed with which this is done. Perception-Reaction Time (
Calculate the Amount of Import or Export For the project site shown in Figure, the amount of import or export to bring the entire site to elevation 90-ft is most nearly:
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Types of Pavements: On the basis of structural performance of pavements, there are basically two types of pavements: (a) Flexible, and (b) Rigid. A flexible pavement
What is the special feature of this system rather than other?? What do you mean by principal of looping system?
advantages and disadvantages of chemical prestressing over conventional prestressing?
Question Why are manhole covers finished of cast iron as same are through of ductile iron ? Answer Usually, manholes covers are made of cast iron. Though, in viewpoint of pipe
Maintenance of Earth Roads: The main task in maintaining the earth road is to ensure that cross-section is intact and is free from rutting, depressions and corrugations, and
list the properties of aggregates
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