CCIL 2-1C - Sampling Concrete Questions and Answers
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Module
CCIL
Institution
CCIL
CCIL 2-1C - Sampling Concrete Questions and Answers
When should you grab the sample?
between 10% to 90% discharge
When does that range not apply?
If super-plasticizer is going to be added, then take an initial sample
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CCIL 2-1C - Sampling Concrete
Questions and Answers
When should you grab the sample? - answer between 10% to 90% discharge
When does that range not apply? - answer If super-plasticizer is going to be added,
then take an initial sample
How many litres do you need to mould 3 100mm x 200mm cylinders? 150mm x
300mm? - answer 20L and 30L
When testing for uniformity, when should you obtain samples? - answer From three
widely separated points.
You need to obtain, transport, and remix the samples within how long? - answer 10
minutes
You should place the sample to ensure it's protected from what? - answer Sun, wind,
and other sources of rapid evaporation, and contamination
When does concrete need to be sieved? - answer When it contains aggregate larger
than is appropriate for the size of the mould, and before remixing.
What information is required in the report? (10 items) - answer - Concrete mix I.D.
- Source of the sample (bill no., batch no., plant I.D.)
- Date and time of sampling
- Project site I.D.
- location of the sampling operation if other then point of discharge of concrete delivery
equipment
- location of concrete in the structure under construction represented by sample.
- Name of the certified technician performing the sampling
- I.D. of the certified laboratory performing the sampling (i.e. name and address)
- Name and signature of the person responsible for the review of the test report
- Any deviation from the test procedure
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