ACI Certification- Concrete Field Testing
Technician Grade 1 CP-1 (12)
A 6 through 12 in. [150 mm by 300 mm] cylinder mold may be used for concrete containing
combination with debris no longer exceeding _____ in size, with out the need for wet sieving the
concrete. - ANS-2 in. [50 mm]
A mallet weighing _____ ought to be used to faucet the sides of the bowl after rodding every
layer. - ANS-1.25 ± zero.50 lb. (600 ± 2 hundred g)
A maximum temperature of freshly blended concrete is laid out in ASTM C1064. True or False?
- ANS-False
A plastic field can be used for the measure in this technique. True or False? - ANS-False,
degree need to be steel or different suitable steel
After completing the strike-off process, what need to be accomplished earlier than weighing the
measure and pattern? - ANS-Clean off any extra concrete
After consolidation of the very last layer, an extra of concrete _____ above the pinnacle of the
degree is taken into consideration best. - ANS-⅛ in. [3 mm]
After molding test specimens, you need to wait hours earlier than moving them to the vicinity of
initial storage. True or False? - ANS-False; the specimens have to be moved at once
After rodding every layer, what need to be carried out to the degree before including another
layer of concrete? - ANS-Tap the sides of the measure well 10 to 15 instances with the mallet
After the very last rodding, the perimeters of the slump mould have to be tapped gently with the
tamping rod. True or False? - ANS-False
Air Content Calculation
Your air meter has been broken in transit to the job web page. You do, however, own the
theoretical density that become decided in the lab; it's far 151.Four lb/ft3 (2425 kg/m3). Using
the density calculated in Question 21, calculate the air content material of the batch (in
percentage). - ANS-five.Zero% = [(151.4 lb/ft3 - 143.9 lb/ft3) / 151.4 lb/ft3] × 100
5.0% = [(2425 kg/m3 - 2305 kg/m3) / 2425 kg/m3] × a hundred
, Air meter bowls used for this test ought to agree to ASTM _____ and be calibrated for volume
according
to ASTM _____. - ANS-C231, C29
ASTM C1064 - ANS-Standard Test Method For Temperature of Freshly Mixed
Hydraulic-Cement Concrete
ASTM C138 - ANS-Standard Test Method for Density (Unit Weight),
Yield, and Air Content (Gravimetric) of Concrete
ASTM C143 - ANS-Standard Test Method for Slump of Hydraulic-Cement Concrete
ASTM C172 - ANS-Standard Practice for Sampling Freshly Mixed Concrete
ASTM C173 - ANS-Standard Test Method For Air Content of Freshly Mixed Concrete by means
of the Volumetric Method
ASTM C231 -
ANS-StandardTestMethodforAirContentofFreshlyMixedConcretebythePressureMethod
ASTM C31 - ANS-Standard Practice for Making and Curing
Concrete Test Specimens inside the Field
ASTM Method C31 offers standardized necessities for _____, _____, _____, and _____, of
check specimens. - ANS-Making, curing, defensive, transporting
At the give up of the method, the air meter is _______. - ANS-Disassembled and its contents
examined
Concrete combinations with distinct strengths of 6000 psi [40 MPa] or extra shall have an
preliminary curing temperature between ___________. - ANS-68 and seventy eight ºF [20 and
26 ºC]
Concrete samples from a truck mixer need to be obtained before any water or admixtures are
brought to the mixer on the activity site. True or False? - ANS-False
Cylinders made for the cause of figuring out while a structure may be positioned into provider
shall be removed from the molds
_________________________________________________________. - ANS-At the time of
the removal of formwork
Cylinders which might be to be area cured are saved ___________________________ and
protected _______. - ANS-In or at the shape as near to the factor of deposit of the concrete
represented as viable; In as near as viable the equal way because the shaped paintings
Technician Grade 1 CP-1 (12)
A 6 through 12 in. [150 mm by 300 mm] cylinder mold may be used for concrete containing
combination with debris no longer exceeding _____ in size, with out the need for wet sieving the
concrete. - ANS-2 in. [50 mm]
A mallet weighing _____ ought to be used to faucet the sides of the bowl after rodding every
layer. - ANS-1.25 ± zero.50 lb. (600 ± 2 hundred g)
A maximum temperature of freshly blended concrete is laid out in ASTM C1064. True or False?
- ANS-False
A plastic field can be used for the measure in this technique. True or False? - ANS-False,
degree need to be steel or different suitable steel
After completing the strike-off process, what need to be accomplished earlier than weighing the
measure and pattern? - ANS-Clean off any extra concrete
After consolidation of the very last layer, an extra of concrete _____ above the pinnacle of the
degree is taken into consideration best. - ANS-⅛ in. [3 mm]
After molding test specimens, you need to wait hours earlier than moving them to the vicinity of
initial storage. True or False? - ANS-False; the specimens have to be moved at once
After rodding every layer, what need to be carried out to the degree before including another
layer of concrete? - ANS-Tap the sides of the measure well 10 to 15 instances with the mallet
After the very last rodding, the perimeters of the slump mould have to be tapped gently with the
tamping rod. True or False? - ANS-False
Air Content Calculation
Your air meter has been broken in transit to the job web page. You do, however, own the
theoretical density that become decided in the lab; it's far 151.Four lb/ft3 (2425 kg/m3). Using
the density calculated in Question 21, calculate the air content material of the batch (in
percentage). - ANS-five.Zero% = [(151.4 lb/ft3 - 143.9 lb/ft3) / 151.4 lb/ft3] × 100
5.0% = [(2425 kg/m3 - 2305 kg/m3) / 2425 kg/m3] × a hundred
, Air meter bowls used for this test ought to agree to ASTM _____ and be calibrated for volume
according
to ASTM _____. - ANS-C231, C29
ASTM C1064 - ANS-Standard Test Method For Temperature of Freshly Mixed
Hydraulic-Cement Concrete
ASTM C138 - ANS-Standard Test Method for Density (Unit Weight),
Yield, and Air Content (Gravimetric) of Concrete
ASTM C143 - ANS-Standard Test Method for Slump of Hydraulic-Cement Concrete
ASTM C172 - ANS-Standard Practice for Sampling Freshly Mixed Concrete
ASTM C173 - ANS-Standard Test Method For Air Content of Freshly Mixed Concrete by means
of the Volumetric Method
ASTM C231 -
ANS-StandardTestMethodforAirContentofFreshlyMixedConcretebythePressureMethod
ASTM C31 - ANS-Standard Practice for Making and Curing
Concrete Test Specimens inside the Field
ASTM Method C31 offers standardized necessities for _____, _____, _____, and _____, of
check specimens. - ANS-Making, curing, defensive, transporting
At the give up of the method, the air meter is _______. - ANS-Disassembled and its contents
examined
Concrete combinations with distinct strengths of 6000 psi [40 MPa] or extra shall have an
preliminary curing temperature between ___________. - ANS-68 and seventy eight ºF [20 and
26 ºC]
Concrete samples from a truck mixer need to be obtained before any water or admixtures are
brought to the mixer on the activity site. True or False? - ANS-False
Cylinders made for the cause of figuring out while a structure may be positioned into provider
shall be removed from the molds
_________________________________________________________. - ANS-At the time of
the removal of formwork
Cylinders which might be to be area cured are saved ___________________________ and
protected _______. - ANS-In or at the shape as near to the factor of deposit of the concrete
represented as viable; In as near as viable the equal way because the shaped paintings
