CCIL EVALUATION EXAMS UPDATED QUESTIONS
AND ANSWERS SURE A+
✔✔Self-Consolidating Concrete moulding requirements (lift/rodding/tapping/overfilling) -
✔✔Place into mould in one lift, slightly overfilling the top. Tap the outer sides 10 or more
times with mallet to close gaps.
✔✔Filling Vibration Moulds - ✔✔Use 2 equal lifts. Avoid overfilling more than 6mm.
After 2nd layer, add enough concrete to overfill by 3mm and strike off.
✔✔Internal Vibration insertion - 100mm x 200mm - ✔✔1 insertion/lift.
✔✔Internal Vibration insertion - 150mm x 300mm - ✔✔3 insertions. Penetrate til 25mm
into bottom lift.
✔✔When are specimens removed from moulds? - ✔✔20 +/- 4 hrs.
✔✔Initial Curing Temperature in field - ✔✔Between 15 and 25 degrees C.
✔✔Extended Demoulding Time allowed - ✔✔Extended to 76hrs if strength is less than
35MPa.
, ✔✔How long must you wait before transporting specimens after initial curing? -
✔✔20hrs.
✔✔Flexural Test Specimen Size - ✔✔Length at least 50mm greater than 3 times the
depth formed with long axes horizontal. Ratio of width to depth as moulded should not
exceed 1.5, cross-section should not be less than 150mm x 150mm or 3x the maximum
size of aggregate, whichever is larger.
✔✔Placing concrete - Flexural Test - ✔✔Moulds 200mm or less are filled in 2 equal lifts.
More than 200mm= 3 equal lifts.
✔✔Rodding Flex Specimens - ✔✔Once for every 10cm squared of area. Rod upper
layer so strokes penetrate 25mm into layer below. Slightly overfill top layer.
✔✔Flexural Specimens - Internal Vibration - ✔✔Intervals not exceeding 150mm along
the centreline of the long dimension of the specimen. Wider than 150mm, use
alternating insertions along 2 lines.
✔✔How long do flexural test specimens initially cure before demoulding? - ✔✔48 +/- 4
hrs. Store in lime water (23 +/- 2 degrees C) for 24 +/- 4 hrs before testing.
✔✔Tampering Rod Dimensions for Air Content Test - ✔✔16mm +/- 1mm Diameter,
between 450mm and 600mm length. One end must have a hemispherical tip.
✔✔Measuring Bowl size requirements and strength requirement - ✔✔Sufficiently rigid to
limit expansion to 0.1% of scale reading at operating pressure. 7L bowl maximum
aggregate size of 40mm, 15L bowl maximum aggregate size of 56mm.
✔✔Air Guage Dial range - ✔✔Permits direct reading to a minimum of 0.2% for air
volumes in the usual range of 0-8%.
✔✔Calibration Cylinder - ✔✔Volume in the range of 1-6% of the volume of the base
container.
✔✔Air Meter Readings - ✔✔Are to the nearest 0.1%.
✔✔How long do you have to conduct your air test from collecting your sample? - ✔✔10
minutes.
✔✔Air Meter Rodding strokes - ✔✔15L - 25 strokes. Greater than 15L - 50 strokes.
✔✔Slump on Mixtures with aggregate larger than 40mm - ✔✔Sample is sieved and
slump test is conducted with material that passed through a 40mm sieve. Not applicable
to non-plastic concrete.
AND ANSWERS SURE A+
✔✔Self-Consolidating Concrete moulding requirements (lift/rodding/tapping/overfilling) -
✔✔Place into mould in one lift, slightly overfilling the top. Tap the outer sides 10 or more
times with mallet to close gaps.
✔✔Filling Vibration Moulds - ✔✔Use 2 equal lifts. Avoid overfilling more than 6mm.
After 2nd layer, add enough concrete to overfill by 3mm and strike off.
✔✔Internal Vibration insertion - 100mm x 200mm - ✔✔1 insertion/lift.
✔✔Internal Vibration insertion - 150mm x 300mm - ✔✔3 insertions. Penetrate til 25mm
into bottom lift.
✔✔When are specimens removed from moulds? - ✔✔20 +/- 4 hrs.
✔✔Initial Curing Temperature in field - ✔✔Between 15 and 25 degrees C.
✔✔Extended Demoulding Time allowed - ✔✔Extended to 76hrs if strength is less than
35MPa.
, ✔✔How long must you wait before transporting specimens after initial curing? -
✔✔20hrs.
✔✔Flexural Test Specimen Size - ✔✔Length at least 50mm greater than 3 times the
depth formed with long axes horizontal. Ratio of width to depth as moulded should not
exceed 1.5, cross-section should not be less than 150mm x 150mm or 3x the maximum
size of aggregate, whichever is larger.
✔✔Placing concrete - Flexural Test - ✔✔Moulds 200mm or less are filled in 2 equal lifts.
More than 200mm= 3 equal lifts.
✔✔Rodding Flex Specimens - ✔✔Once for every 10cm squared of area. Rod upper
layer so strokes penetrate 25mm into layer below. Slightly overfill top layer.
✔✔Flexural Specimens - Internal Vibration - ✔✔Intervals not exceeding 150mm along
the centreline of the long dimension of the specimen. Wider than 150mm, use
alternating insertions along 2 lines.
✔✔How long do flexural test specimens initially cure before demoulding? - ✔✔48 +/- 4
hrs. Store in lime water (23 +/- 2 degrees C) for 24 +/- 4 hrs before testing.
✔✔Tampering Rod Dimensions for Air Content Test - ✔✔16mm +/- 1mm Diameter,
between 450mm and 600mm length. One end must have a hemispherical tip.
✔✔Measuring Bowl size requirements and strength requirement - ✔✔Sufficiently rigid to
limit expansion to 0.1% of scale reading at operating pressure. 7L bowl maximum
aggregate size of 40mm, 15L bowl maximum aggregate size of 56mm.
✔✔Air Guage Dial range - ✔✔Permits direct reading to a minimum of 0.2% for air
volumes in the usual range of 0-8%.
✔✔Calibration Cylinder - ✔✔Volume in the range of 1-6% of the volume of the base
container.
✔✔Air Meter Readings - ✔✔Are to the nearest 0.1%.
✔✔How long do you have to conduct your air test from collecting your sample? - ✔✔10
minutes.
✔✔Air Meter Rodding strokes - ✔✔15L - 25 strokes. Greater than 15L - 50 strokes.
✔✔Slump on Mixtures with aggregate larger than 40mm - ✔✔Sample is sieved and
slump test is conducted with material that passed through a 40mm sieve. Not applicable
to non-plastic concrete.
