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Aci Concrete Field Testing Technician Grade 1 Study Guide /Q&A
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- Aci Concrete Field Testing Technician Grade 1
Aci Concrete Field Testing Technician Grade 1 Study Guide /Q&A
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Aci Concrete Field Testing Technician Grade 1Study Guide 2023 -2024 /Q&A
Quiz :ASTM C31 / C31M-06 - Answer :Standard Practice for Making, Curing,
Protecting & Transporting Test Specimens in the Field Conditions.
Quiz :ASTM C1064 /C1064M-05 - Answer :Standard Test Method for
Temperature of Freshly Mixed Hydraulic-Cement Concrete
Quiz :ASTM C172 -07 - Answer :Standard Practice For Sampling Freshly Mixed
Concrete From Different Containers Used In The Production or Transportation
Of Concrete.
Quiz :ASTM C143 / C143M-05a - Answer :Standard Test Method for Slump of
Hydraulic-Cement Concrete Both In Laboratory And In The Field
Quiz :ASTM C138 / C138M-07 - Answer :Standard Test Method for Density
(Unit Weight), Yield, and Air Content (Gravimetric) of Concrete
Quiz :ASTM C231 -04 - Answer :Standard Test Method for Air Content of
Freshly Mixed Concrete by Pressure Method
Quiz :ASTM C173 / C173M-07 - Answer :Standard Test Method For Air
Content of Freshly Mixed Concrete Containing Any Type Of Aggregate,
Whether It Be Dense, Cellular, or Lightweight by Volumetric Method
Quiz :Molds - Answer :Mold for specimens shall be made of steel, cast iron, or
other nonabsorbent material, nonreactive with concrete. Molds shall be
watertight and hold their dimensions and shape under all conditions of use.
Quiz :Cylindrical Specimens - Answer :Compressive or Splitting Tensile
Strength Specimens shall be cylinders cast and allowed to set in an upright
position. The length shall be twice the diameter (4 X 8in or 6 X 12 in). The
cylinder daimeter shall be at least 3 times the nominal maximum size of the
coarse aggregate. When the nominal maximum size of the coarse aggregate
exceeds 2 inches the concrete sample shall be treated by wet sieving through a
2 inch sieve.
Quiz :Beam Specimens - Answer :Flexural strength specimens shall be beams
of concrete cast and hardened in the horizontal position. The length shall be at
, least 2 inch greater than three times the depth as tested. The ratio of width to
depth as molded shall not exceed 1.5. The standard beam shall be 6 by 6
inches in cross section, and shall be used for concrete with nominal maximum
size coarse aggregate up to 2 inches. When the nominal maximum size of the
coarse aggregate exceeds 2 inches, the smaller cross sectional dimension of
the beam shall be at least three times the nominal maximum size of the coarse
aggregate.
Quiz :Tamping Rod - Answer :A round, straight steel rod having the tamping
end or both ends rounded to a hemispherical tip of the same diameter as the
rod.
Rod Dimensions are based off of the diameter of Cylinder or Width of Beam.
- less than 6 inch, Rod =Diameter 3/8 inch & Length 12inch
- 6 inch, Rod = Diameter 5/8 inch & Length 20 inches
- 9 inch, Rod = Diameter 5/8 inch & Length 26 inches
[Rod tolerances length + or - 4inches and diameter + or - 1/16inch.]
Quiz :Vibrators - Answer :Internal vibrators shall be used. The vibrator
frequency shall be at least 9000 vibrations per minute while the vibrator is
operating in the concrete. The diameter of a round vibrator shall be no more
than one fourth the diameter of the cylinder mold or width of the beam mold.
The combined length of the vibrator shaft and vibrating element shall exceed
the depth of the section being vibrated by at least 3 inches.
Quiz :Mallet - Answer :A mallet with a rubber or rawhide head weighing 1.25
+ or - 0.5 lb shall be used.
Quiz :Sampling Receptacle - Answer :The receptacle shall be a suitable Heavy
Gage metal pan, wheelbarrow, or flat, clean nonabsorbent board of sufficient
capacity to allow easy remixing of the entire sample with a shovel or trowel.
Quiz :Temperature Measureing Device - Answer :Shall be capable of
accurately measuring the temperature 3 inches or more immersion of the
freshly mixed concrete to plus or minus 1 degree Fahrenheit throughout the
range of 30 - 120 degrees Feahrenheit. The device shall be readable and
accurate to plus or minus 0.5 Feahrenheit. Verification of direct reading
resistance reference temperature measuring devices shall be performed every
twelve months.
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