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CCIL laboratory testing with 100- correct answers(verified for accuracy).
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CCIL laboratory testing with 100- correct answers(verified for accuracy).
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CCIL laboratory testing with 100%correct answers(verified for
accuracy)
When do lab cured cylinders need to be demolded? - answer 20 +/-
4 hrs after casting time
When do field cured cylinders need to be demolded? - answer 28
+/- 8 hrs after casting time
Why can lab cured cylinders be demolded earlier than field cured
cylinders? - answer This is because field cured cylinders will need
to be transported to a lab so they need the extra time to ensure
that the cylinders set properly before being moved around.
When are cardboard moulds used? - answer For concrete <35 MPA
What temperature should the curing tanks be kept at and how often
should they be monitered. - answer Temp. should be at 23 +/- 2 C
and temperature recorder should be kept in the tank and checked
twice a day at least 5 days per week accurate to 0.5 C.
What should the tanks be saturated with ? - answer Calcium
hydroxide
What ratio should the cylinders length be to its diameter? - answer
2:1
Initial curing in "field" temp. ? - answer 15 - 25 C
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