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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.
The plan of a proposed spoil heap is shown in Fig. The heap will stand on a thick deposit of soft clay with E-value 15 MN/m 2 . The uniform pressure on the soil may be suppose as 1
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Determine the thickness of flexible pavement layer 2 given the following: FACTS: Total Structural Number required = 7.0 Total number of layers = 2 Layer 1 consists of
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Define Equipments required for conducting UWMT? Equipments required for conducting UWMT are: Inspection Equipment: a) Electronic yoke with power cable b) Ground fault interr
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