ACI Concrete Strength Testing EXAM COVERAGE
Technician
ACI - Concrete Strength Testing Technician
Concrete basics: properties affecting strength
(water-cement ratio, curing, admixtures)
Sampling freshly mixed concrete procedures
Fabrication of test specimens (cylinders/beams)
Initial curing requirements (field conditions)
Final curing requirements (laboratory conditions)
Compressive strength testing of cylinders
Flexural strength testing of beams
Capping and end preparation methods
Use, calibration, and verification of compression
testing machines
Calculation of strength results and acceptance
criteria
Documentation and reporting per ACI/ASTM
standards
Identification of improper specimens and invalid
tests
Laboratory safety practices and PPE
requirements
Quality control and technician responsibilities
,Plates used for sulfur capping have 1/2
a recessed area to hold sulfur that
cannot be more than _______ in.
deep.
In all cases, plates shall be at least 1, 0.002, 6
________ in. greater in diameter than
the test specimen and the working
surfaces shall not depart from a
plane by more than ________ in ________
inches.
, Alignment devices ensure that the 0.5
resulting caps are perpendicular to
the axis of the cylinder to within
_____________°.
1/4, 0.45, 3
Neat cement caps and high-
strength gypsum-plaster shall be
formed against a glass plate at
least _________ in. thick, a machined
metal plate at least _______ in. thick,
or a polished plate of granite or
diabase at least _______ in. thick.
A pot with ___________________ automatic temperature control
_______________________ __________________ is
required for melting and heating
sulfur mortar.
Never heat the melting pot over an open flame, hood
___________ ___________. The sulfur pot
must be located under a _________ to
exhaust the fumes.
Technician
ACI - Concrete Strength Testing Technician
Concrete basics: properties affecting strength
(water-cement ratio, curing, admixtures)
Sampling freshly mixed concrete procedures
Fabrication of test specimens (cylinders/beams)
Initial curing requirements (field conditions)
Final curing requirements (laboratory conditions)
Compressive strength testing of cylinders
Flexural strength testing of beams
Capping and end preparation methods
Use, calibration, and verification of compression
testing machines
Calculation of strength results and acceptance
criteria
Documentation and reporting per ACI/ASTM
standards
Identification of improper specimens and invalid
tests
Laboratory safety practices and PPE
requirements
Quality control and technician responsibilities
,Plates used for sulfur capping have 1/2
a recessed area to hold sulfur that
cannot be more than _______ in.
deep.
In all cases, plates shall be at least 1, 0.002, 6
________ in. greater in diameter than
the test specimen and the working
surfaces shall not depart from a
plane by more than ________ in ________
inches.
, Alignment devices ensure that the 0.5
resulting caps are perpendicular to
the axis of the cylinder to within
_____________°.
1/4, 0.45, 3
Neat cement caps and high-
strength gypsum-plaster shall be
formed against a glass plate at
least _________ in. thick, a machined
metal plate at least _______ in. thick,
or a polished plate of granite or
diabase at least _______ in. thick.
A pot with ___________________ automatic temperature control
_______________________ __________________ is
required for melting and heating
sulfur mortar.
Never heat the melting pot over an open flame, hood
___________ ___________. The sulfur pot
must be located under a _________ to
exhaust the fumes.
