ACI Certification- Concrete Field Testing
Technician Grade 1 CP-1 (12)
A 6 by using 12 in. [150 mm by 300 mm] cylinder mildew may be used for concrete containing
aggregate with debris now not exceeding _____ in length, without the want for moist sieving the
concrete. - ANS-2 in. [50 mm]
A mallet weighing _____ should be used to tap the sides of the bowl after rodding every layer. -
ANS-1.25 ± zero.50 lb. (600 ± two hundred g)
A maximum temperature of freshly blended concrete is laid out in ASTM C1064. True or False?
- ANS-False
A plastic field may be used for the measure on this method. True or False? - ANS-False,
measure should be steel or different suitable metal
After finishing the strike-off system, what need to be finished before weighing the degree and
sample? - 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 choicest. - ANS-⅛ in. [3 mm]
After molding test specimens, you need to wait hours earlier than moving them to the vicinity of
initial garage. True or False? - ANS-False; the specimens ought to be moved straight away
After rodding every layer, what should be achieved to the degree earlier than including some
other layer of concrete? - ANS-Tap the edges of the degree well 10 to 15 times with the mallet
After the very last rodding, the sides of the stoop mould need to be tapped lightly with the
tamping rod. True or False? - ANS-False
Air Content Calculation
Your air meter has been damaged in transit to the job site. You do, however, own the theoretical
density that was decided within the lab; it's far 151.4 lb/ft3 (2425 kg/m3). Using the density
calculated in Question 21, calculate the air content material of the batch (in percentage). -
ANS-five.0% = [(151.4 lb/ft3 - 143.9 lb/ft3) / 151.4 lb/ft3] × 100
5.0% = [(2425 kg/m3 - 2305 kg/m3) / 2425 kg/m3] × one hundred
, Air meter bowls used for this test need to conform to ASTM _____ and be calibrated for quantity
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 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 gives standardized necessities for _____, _____, _____, and _____, of take
a look at specimens. - ANS-Making, curing, shielding, transporting
At the quit of the method, the air meter is _______. - ANS-Disassembled and its contents
examined
Concrete mixtures with specific strengths of 6000 psi [40 MPa] or more shall have an initial
curing temperature among ___________. - ANS-sixty eight and 78 ºF [20 and 26 ºC]
Concrete samples from a truck mixer have to be acquired earlier than any water or admixtures
are introduced to the mixer on the activity website online. True or False? - ANS-False
Cylinders made for the reason of figuring out when a structure may be placed into provider shall
be eliminated from the molds
_________________________________________________________. - ANS-At the time of
the elimination of formwork
Cylinders that are to be discipline cured are stored ___________________________ and
guarded _______. - ANS-In or at the structure as close to to the factor of deposit of the concrete
represented as feasible; In as close to as feasible the same way because the fashioned work
Technician Grade 1 CP-1 (12)
A 6 by using 12 in. [150 mm by 300 mm] cylinder mildew may be used for concrete containing
aggregate with debris now not exceeding _____ in length, without the want for moist sieving the
concrete. - ANS-2 in. [50 mm]
A mallet weighing _____ should be used to tap the sides of the bowl after rodding every layer. -
ANS-1.25 ± zero.50 lb. (600 ± two hundred g)
A maximum temperature of freshly blended concrete is laid out in ASTM C1064. True or False?
- ANS-False
A plastic field may be used for the measure on this method. True or False? - ANS-False,
measure should be steel or different suitable metal
After finishing the strike-off system, what need to be finished before weighing the degree and
sample? - 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 choicest. - ANS-⅛ in. [3 mm]
After molding test specimens, you need to wait hours earlier than moving them to the vicinity of
initial garage. True or False? - ANS-False; the specimens ought to be moved straight away
After rodding every layer, what should be achieved to the degree earlier than including some
other layer of concrete? - ANS-Tap the edges of the degree well 10 to 15 times with the mallet
After the very last rodding, the sides of the stoop mould need to be tapped lightly with the
tamping rod. True or False? - ANS-False
Air Content Calculation
Your air meter has been damaged in transit to the job site. You do, however, own the theoretical
density that was decided within the lab; it's far 151.4 lb/ft3 (2425 kg/m3). Using the density
calculated in Question 21, calculate the air content material of the batch (in percentage). -
ANS-five.0% = [(151.4 lb/ft3 - 143.9 lb/ft3) / 151.4 lb/ft3] × 100
5.0% = [(2425 kg/m3 - 2305 kg/m3) / 2425 kg/m3] × one hundred
, Air meter bowls used for this test need to conform to ASTM _____ and be calibrated for quantity
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 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 gives standardized necessities for _____, _____, _____, and _____, of take
a look at specimens. - ANS-Making, curing, shielding, transporting
At the quit of the method, the air meter is _______. - ANS-Disassembled and its contents
examined
Concrete mixtures with specific strengths of 6000 psi [40 MPa] or more shall have an initial
curing temperature among ___________. - ANS-sixty eight and 78 ºF [20 and 26 ºC]
Concrete samples from a truck mixer have to be acquired earlier than any water or admixtures
are introduced to the mixer on the activity website online. True or False? - ANS-False
Cylinders made for the reason of figuring out when a structure may be placed into provider shall
be eliminated from the molds
_________________________________________________________. - ANS-At the time of
the elimination of formwork
Cylinders that are to be discipline cured are stored ___________________________ and
guarded _______. - ANS-In or at the structure as close to to the factor of deposit of the concrete
represented as feasible; In as close to as feasible the same way because the fashioned work
