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CCIL A23.2-3C Exam Questions and Answers - Making and curing compression specimens
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CCIL A23.2-3C Exam Questions and Answers - Making and curing compression specimens
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CCIL A23.2-3C - Making and curingcompression specimens
When can you use cardboard moulds to cast compression cylinders? - Answer -When you satisfactory
documentation indicating the cylinders produced will have compressive strengths equivalent to those
obtained by rigid, non-absorbent moulds, and if the concrete is less than 35 MPa
What are the specifications for an internal vibrator? - Answer -120Hz, diameter of vibrating element
20mm to 40mm, length of vibrating element 50mm less than height of mould being consolidated.
For cylindrical and beams, what are the ratio of the diameter/width to diameter of vibrating elements? -
Answer -For cylindrical min. ratio of 4:1, for beams max 1/3rd the width of the beam
What are the specs for external vibrators? - Answer -60Hz, with a means of clamping the moulds
securely to the apparatus. A tachometer should be used to check frequency of vibration.
What is the temperature range for water storage tanks and moist cabinets/rooms? - Answer -23d celcius
+/- 2d
How often should a temperature recorder be verified? - Answer -At least every 6 months or whenever
there is a question of accuracy?
Reference temperature devices shall be readable and accurate to? - Answer -0.2d celcius
When does the moulding have to be complete after sampling? - Answer -20 minutes max
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