ASTM C173 / C173M AIR BY VOLUMETRIC
METHOD STUDY QUESTIONS AND ANSWERS
All types of aggregate - ANSWER The volumetric method of determining air
content of concrete can be applied to concrete containing what types of
aggregate?
A round, smooth, straight steel, high-density polyethylene, or other plastic rod
of equal or greater abrasion resistance with a 16mm or 5/8 inch +or- 2mm or
1/16 inch diameter. The length of the tamping rod shall be at least 100 mm or 4
inches greater than the depth of the measuring bowl in which rodding is being
performed, but not greater than 600 mm or 24 inches in overall length. -
ANSWER What are the requirements for the tamping rod used in this test
method?
Flat, straight steel bar at least 3 by 20 by 300 mm or 1/8 by 3/4 by 12 inches or
a flat, straight high-density polyethylene bar, or other plastic of equal or greater
abrasion resistance, at least 6 by 20 by 300 mm or 1/4 by 3/4 by 12 inches -
ANSWER What are the requirements for the strike-off bar used in this test
method?
1.00 ± .04% - ANSWER What is the approximate volume of the measuring
cup used to add water to the air meter, relative to the volume of the air meter
bowl?
Isopropyl, 70% by volume (65% by weight) - ANSWER What type of alcohol
and concentration must be utilized in this test method?
METHOD STUDY QUESTIONS AND ANSWERS
All types of aggregate - ANSWER The volumetric method of determining air
content of concrete can be applied to concrete containing what types of
aggregate?
A round, smooth, straight steel, high-density polyethylene, or other plastic rod
of equal or greater abrasion resistance with a 16mm or 5/8 inch +or- 2mm or
1/16 inch diameter. The length of the tamping rod shall be at least 100 mm or 4
inches greater than the depth of the measuring bowl in which rodding is being
performed, but not greater than 600 mm or 24 inches in overall length. -
ANSWER What are the requirements for the tamping rod used in this test
method?
Flat, straight steel bar at least 3 by 20 by 300 mm or 1/8 by 3/4 by 12 inches or
a flat, straight high-density polyethylene bar, or other plastic of equal or greater
abrasion resistance, at least 6 by 20 by 300 mm or 1/4 by 3/4 by 12 inches -
ANSWER What are the requirements for the strike-off bar used in this test
method?
1.00 ± .04% - ANSWER What is the approximate volume of the measuring
cup used to add water to the air meter, relative to the volume of the air meter
bowl?
Isopropyl, 70% by volume (65% by weight) - ANSWER What type of alcohol
and concentration must be utilized in this test method?
