ASTM C231 / C231M Air Content of
Freshly Mixed Concrete by the Pressure
Method Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
The pressure method of Relatively dense (1.2)
determining air content can be
used on concrete containing
______ aggregate.
The pressure method of Lightweight, air-cooled blast furnace
determining air content cannot slag, or aggregates of high porosity.
be used on concrete (1.2)
containing the following types
of aggregate: _____, _____,
_____.
What is the minimum 0.20 ft^3
allowable capacity of the
measuring bowl used in this
test method?
What are the required Round, smooth, straight steel rod.
characteristics of the tamping 5/8" +- 1/16" diameter =>4" greater
rod used in this test method? than depth of measuring bowl < 24"
overall Tamping end rounded to
hemispherical tip of same diameter
as rod.
Freshly Mixed Concrete by the Pressure
Method Exam Questions and Answers
with Verified Solutions | Latest Updated
2026
The pressure method of Relatively dense (1.2)
determining air content can be
used on concrete containing
______ aggregate.
The pressure method of Lightweight, air-cooled blast furnace
determining air content cannot slag, or aggregates of high porosity.
be used on concrete (1.2)
containing the following types
of aggregate: _____, _____,
_____.
What is the minimum 0.20 ft^3
allowable capacity of the
measuring bowl used in this
test method?
What are the required Round, smooth, straight steel rod.
characteristics of the tamping 5/8" +- 1/16" diameter =>4" greater
rod used in this test method? than depth of measuring bowl < 24"
overall Tamping end rounded to
hemispherical tip of same diameter
as rod.
