ASTM C231 Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
ASTM C231 Air Content by Pressure Method
What types of concrete can Normal and heavyweight
this test method be used on?
This test is not applicable to Lightweight aggregates, porous
concretes made with _______. aggregates or air cooled blast
furnace slag and non-plastic
concrete.
The min. diameter of the Equal to 0.75 to 1.25 times the
measuring bowl shall be: height
Min. capacity of the measuring 6.0 L (0.20 ft3)
bowl shall be:
Measuring bowl shall be made Steel, hard metal or other hard
of ________, _________ or material not readily attacked by
__________. cement past.
Strike off bar shall be _______ x 1/8" thick x 3/4" wide x 12" long
________ x _______.
If concrete contains aggregate 2" / 1 1/2"
that would be retained on a
_____ sieve, it should be wet
, sieved over an ______ sieve.
Internal surface of air meter Clean / Oil and grease
cover assemblies shall be kept
______ and free from _________.
If using a Type A meter, ______
additional check tests should
be completed.
The consecutive 0.2%
determinations of apparent air
content should check within
_______ of air and are averaged
to be used in calculating air
content when using a Type A
meter.
Aggregate correction factor Subtracted
should be _________ from the
apparent air content of sample
tested to equal the final air
content.
Air content of the concrete 0.1%
sample is reported to the
nearest ______ after
subtracting the aggregate
correction factor.
If meter reading exceeds 8%,
reading shall be reported to
the nearest ______ scale
with Verified Solutions | Latest Updated
2026
ASTM C231 Air Content by Pressure Method
What types of concrete can Normal and heavyweight
this test method be used on?
This test is not applicable to Lightweight aggregates, porous
concretes made with _______. aggregates or air cooled blast
furnace slag and non-plastic
concrete.
The min. diameter of the Equal to 0.75 to 1.25 times the
measuring bowl shall be: height
Min. capacity of the measuring 6.0 L (0.20 ft3)
bowl shall be:
Measuring bowl shall be made Steel, hard metal or other hard
of ________, _________ or material not readily attacked by
__________. cement past.
Strike off bar shall be _______ x 1/8" thick x 3/4" wide x 12" long
________ x _______.
If concrete contains aggregate 2" / 1 1/2"
that would be retained on a
_____ sieve, it should be wet
, sieved over an ______ sieve.
Internal surface of air meter Clean / Oil and grease
cover assemblies shall be kept
______ and free from _________.
If using a Type A meter, ______
additional check tests should
be completed.
The consecutive 0.2%
determinations of apparent air
content should check within
_______ of air and are averaged
to be used in calculating air
content when using a Type A
meter.
Aggregate correction factor Subtracted
should be _________ from the
apparent air content of sample
tested to equal the final air
content.
Air content of the concrete 0.1%
sample is reported to the
nearest ______ after
subtracting the aggregate
correction factor.
If meter reading exceeds 8%,
reading shall be reported to
the nearest ______ scale
