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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 What will functions of water stops in joints of box culverts and drainage channels ? Answer Principal function of water stops is to stop liquids, water-borne materials
Compaction to freshly placed concrete piles In general practice, reliance is placed on the self-compaction of particularly designed concrete mixes to achieve adequate compact
Question What is function of longitudinal joints in concrete road pavements ? Answer A longitudinal joint consists of a tie bar located at mid-depth of a concrete pav
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All semiconductors have how many electrons in their last orbit? Answer: All semiconductors have 4 electrons.
Given: beam deminsions: flange width=22" FLANGE THICKNESS=7" WEB WIDTH=7" SECTION HEIGHT=40" f'c=5000psi f'ci=3500psi fpu=270ksi Ap=eighteen 1/2" diam strands superim
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Define Steel substructure - underwater inspection of bridge? Steel is used as a structural material and as external protective cladding on concrete foundation elements. Steel f
Explain the term - Non-bonded Prestressed Concrete It is a method of construction in which the tendons are not bonded to the concrete. Ducts, housing the tendons, are not grout
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