PCC Level 1
A composite sample of concrete is needed despite the fact that the simplest purpose for
obtaining the pattern is to decide temperature. T or F? - ANS-F
A maximum temperature of freshly blended concrete is specified in Test Method C1064. T or
F? - ANS-F
According to Test Method C1064, what is one cause to take the concrete temperature? -
ANS-Verify conformance to a designated requirement for concrete temperature.
After the final rodding, the edges of the hunch mould ought to be tapped gently with the
tamping rod. T or F? - ANS-F
After the temperature of the concrete is examine, what is then required? - ANS-Reporting of
temperature
Air meter bowls used for this test must agree to ASTM _____ and be calibrated for volumee
consistent with ASTM _____. - ANS-C231 , C29
At the quit of the procedure the air meter is ______. - ANS-Disassembled inside the bucket
and its contents tested
C31 gives standardized requirements for ____,____ and ____ of check specimens. -
ANS-making, curing, protective, and transporting
Concrete mixtures with targeted strengths greater than 6000psi have an initial curing
temperature of ____-____. - ANS-sixty eight-78°F
Concrete samples from a truck mixer should be obtained earlier than any water or
admixtures are added to the mixer on the jobsite. T or F? - ANS-F
Concrete yield (in what devices?)= - ANS-Total mass of materials batched from price
tag/(Measured density of concrete lb/ft3 • 27 ft3/yd3)
yd^3
Cylinders made for the purpose of figuring out whilst a shape can be put into carrier shall be
removed from the mold __________. - ANS-At the time of the elimination of form work.
Cylinders which can be to be field cured are saved __________ and protected __________.
- ANS-In or on the structure as near to the factor of deposit of the concrete represented as
feasible, in as close to as feasible the equal manner as the shaped work.
Density= (accuracy?) - ANS-Net weight of concrete (lb)/Volume of concrete (toes^three)
, tenth of lb/cubic foot
During transportation, test specimens have to be included from damage because of _____,
______, and _____. - ANS-jarring, freezing temps, and moisture loss
Each layer have to fill approximately _____ the volume of the mold. - ANS-1/3
Field Curing is the curing method used while check specimens are for use for __________. -
ANS-Determination of whether or not the shape is able to being put into service, comparison
with general cured specimens checks effects or with consequences from numerous
in-location take a look at methods, adequacy of curing and safety of concrete within the
structure, and form or shoring removal time requirements.
For use inside the hunch check, the tampering and or both ends have to be -
ANS-hemispherical
How deep must the tamping rod penetrate into each layer? - ANS-Rod each layer at some
point of its intensity; on the second and final layers, the rod need to penetrate into the
preceding layer about 1 in. [25 mm]
How long ought to the temperature measuring tool remain in the freshly combined concrete?
- ANS-2-5 minutes
How regularly does the rolling operation arise for the volumetric (rollameter) take a look at? -
ANS-2-three instances
How tons time is authorized for lifting the hunch mould? - ANS-three-7 seconds
How lots time is permitted to behavior the hunch check from starting to finishing touch? -
ANS-2.Five mins
If the concrete includes combination large than the maximum allowed for this check, the
pattern ought to be wet sieved to one.Five". - ANS-
Measured air content material= - ANS-(theoretical denity-real density)/theoretical density •
100%
or (massive#-little#)/large#•one hundred
Measures apart from air meter bowls used for this check have to agree to ASTM _____. -
ANS-C29
Portions of a composite sample shall be thoroughly remixed before starting tests at the
sample. T or F? - ANS-T
Prior to lifting the mold, concrete need to be eliminated from _____. - ANS-The place
surrounding the base of the mold
Relative yield (make sure you both meet or exceed spec)= - ANS-Actual yield/layout yield
A composite sample of concrete is needed despite the fact that the simplest purpose for
obtaining the pattern is to decide temperature. T or F? - ANS-F
A maximum temperature of freshly blended concrete is specified in Test Method C1064. T or
F? - ANS-F
According to Test Method C1064, what is one cause to take the concrete temperature? -
ANS-Verify conformance to a designated requirement for concrete temperature.
After the final rodding, the edges of the hunch mould ought to be tapped gently with the
tamping rod. T or F? - ANS-F
After the temperature of the concrete is examine, what is then required? - ANS-Reporting of
temperature
Air meter bowls used for this test must agree to ASTM _____ and be calibrated for volumee
consistent with ASTM _____. - ANS-C231 , C29
At the quit of the procedure the air meter is ______. - ANS-Disassembled inside the bucket
and its contents tested
C31 gives standardized requirements for ____,____ and ____ of check specimens. -
ANS-making, curing, protective, and transporting
Concrete mixtures with targeted strengths greater than 6000psi have an initial curing
temperature of ____-____. - ANS-sixty eight-78°F
Concrete samples from a truck mixer should be obtained earlier than any water or
admixtures are added to the mixer on the jobsite. T or F? - ANS-F
Concrete yield (in what devices?)= - ANS-Total mass of materials batched from price
tag/(Measured density of concrete lb/ft3 • 27 ft3/yd3)
yd^3
Cylinders made for the purpose of figuring out whilst a shape can be put into carrier shall be
removed from the mold __________. - ANS-At the time of the elimination of form work.
Cylinders which can be to be field cured are saved __________ and protected __________.
- ANS-In or on the structure as near to the factor of deposit of the concrete represented as
feasible, in as close to as feasible the equal manner as the shaped work.
Density= (accuracy?) - ANS-Net weight of concrete (lb)/Volume of concrete (toes^three)
, tenth of lb/cubic foot
During transportation, test specimens have to be included from damage because of _____,
______, and _____. - ANS-jarring, freezing temps, and moisture loss
Each layer have to fill approximately _____ the volume of the mold. - ANS-1/3
Field Curing is the curing method used while check specimens are for use for __________. -
ANS-Determination of whether or not the shape is able to being put into service, comparison
with general cured specimens checks effects or with consequences from numerous
in-location take a look at methods, adequacy of curing and safety of concrete within the
structure, and form or shoring removal time requirements.
For use inside the hunch check, the tampering and or both ends have to be -
ANS-hemispherical
How deep must the tamping rod penetrate into each layer? - ANS-Rod each layer at some
point of its intensity; on the second and final layers, the rod need to penetrate into the
preceding layer about 1 in. [25 mm]
How long ought to the temperature measuring tool remain in the freshly combined concrete?
- ANS-2-5 minutes
How regularly does the rolling operation arise for the volumetric (rollameter) take a look at? -
ANS-2-three instances
How tons time is authorized for lifting the hunch mould? - ANS-three-7 seconds
How lots time is permitted to behavior the hunch check from starting to finishing touch? -
ANS-2.Five mins
If the concrete includes combination large than the maximum allowed for this check, the
pattern ought to be wet sieved to one.Five". - ANS-
Measured air content material= - ANS-(theoretical denity-real density)/theoretical density •
100%
or (massive#-little#)/large#•one hundred
Measures apart from air meter bowls used for this check have to agree to ASTM _____. -
ANS-C29
Portions of a composite sample shall be thoroughly remixed before starting tests at the
sample. T or F? - ANS-T
Prior to lifting the mold, concrete need to be eliminated from _____. - ANS-The place
surrounding the base of the mold
Relative yield (make sure you both meet or exceed spec)= - ANS-Actual yield/layout yield
