1-113 of 113
The measurement of slump is made form the top of the mould to what point of the
concrete specimen?
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Average height of top surface of concrete after subsidence
,After initial curing, compressive strength test specimens used as the basis of
acceptance shall be stored in a ____condition at 23C +/- 2C until the moment of test.
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moist
What is the specified slump below which a vibrator must be used for consolidation?
____
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40mm or less
The temperature of the concrete must be determined within ___ minutes of obtaining
the grab sample.
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5 minutes
When rodding a 100 mm by 200mm cylinder, the tamping rod should penetrate the
previous layer by about___mm.
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, 25mm
For freshly mixed concrete that contains a nominal maximum size aggregate equal to
or less than 80mm, complete the temperature measurement within ___ minutes.
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5
the minimum size sample for making three 100mm diameter strength test cylinder
specimens is
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20l for 100x200mm
What is the required time for demoulding of strength specimens made in the field?
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28h +/- 8h(changed form 24h +/- 4h in previous standards)
The standard practice describes the _____ _____ and _____ required to obtain a
representative sample of fresh concrete and to assess its tractability to the structure it
represents.
, Give this one a try later!
procedures, location and sample size
In how many layers is the measure to be filled when the concrete sample will be
compacted by rodding? ____
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Three
What tools are required to perform an accurate strike-off of the surface?
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Strike off bar or tamping rod and rigid plate
When rodding a 100 mm by 200 mm cylinder, each layer bust be rodded ______ times
with a rod of ____ mm in diameter.
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20; 10mm
In vibrating a flexural strength test specimen using internal vibration, the technician
should insert the vibrator at intervals not exceeding____mm along the centre line of the
The measurement of slump is made form the top of the mould to what point of the
concrete specimen?
Give this one a try later!
Average height of top surface of concrete after subsidence
,After initial curing, compressive strength test specimens used as the basis of
acceptance shall be stored in a ____condition at 23C +/- 2C until the moment of test.
Give this one a try later!
moist
What is the specified slump below which a vibrator must be used for consolidation?
____
Give this one a try later!
40mm or less
The temperature of the concrete must be determined within ___ minutes of obtaining
the grab sample.
Give this one a try later!
5 minutes
When rodding a 100 mm by 200mm cylinder, the tamping rod should penetrate the
previous layer by about___mm.
Give this one a try later!
, 25mm
For freshly mixed concrete that contains a nominal maximum size aggregate equal to
or less than 80mm, complete the temperature measurement within ___ minutes.
Give this one a try later!
5
the minimum size sample for making three 100mm diameter strength test cylinder
specimens is
Give this one a try later!
20l for 100x200mm
What is the required time for demoulding of strength specimens made in the field?
Give this one a try later!
28h +/- 8h(changed form 24h +/- 4h in previous standards)
The standard practice describes the _____ _____ and _____ required to obtain a
representative sample of fresh concrete and to assess its tractability to the structure it
represents.
, Give this one a try later!
procedures, location and sample size
In how many layers is the measure to be filled when the concrete sample will be
compacted by rodding? ____
Give this one a try later!
Three
What tools are required to perform an accurate strike-off of the surface?
Give this one a try later!
Strike off bar or tamping rod and rigid plate
When rodding a 100 mm by 200 mm cylinder, each layer bust be rodded ______ times
with a rod of ____ mm in diameter.
Give this one a try later!
20; 10mm
In vibrating a flexural strength test specimen using internal vibration, the technician
should insert the vibrator at intervals not exceeding____mm along the centre line of the
