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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.
Each physical homogeneous type (solid, liquid orvapour) is a phase. Two or three phases may coexist. e.g. Ice and water at 0 o C. Mixtures of gases (e.g. Air) can only be
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Two load tests were performed at a site-one with a 50 cm square plate and the other with a 75 cm square plate. For a settlement of 15 mm, the loads were recorded as 50 kN and 90 kN
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