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Question
What is key principle of adding cooling pipes or yet using cold water for concrete in concreting operation?
Answer
These methods aim at reducing placing temperature and falling thermal cracks induced during concreting of enormous pours. Because final concreting temperature has to be ambient temperature, reducing initial placing temperature will also lower peak hydration temperature. Therefore, temperature divergence between hydration peak and ambient temperature is reduced so and subsequently thermal effect to concrete structure can be abridged by controlling placing temperature.
Question If on-site slump test fails, is it necessary that engineers allow a contractor to continue concreting works ? Answer This is an extremely traditional question raised by
Determine the uses of Prestressed concrete poles Prestressed concrete poles are commonly mass produced and are used in most countries for power transmission, antenna masts etc
dry process
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Determine the Size and Number of Aeration Basins? For a community of 100,000, determine the size and number of aeration basins in a municipal activated sludge treatment facilit
which section is most effective for a design of beam and why
Question Why Poly tetra fluoro ethylene (PTFE) is usually used in sliding bearings? Answer The choice of sliding surface of bearings is of very important importance since slid
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some expansion joint(10 mm- 20 mm) on my basement roof.rain water leakage in basement i want the solution of expiation joint and water leakes.
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