Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
The diameter of the tamping rod used in this test method is |
5/8'' +- 1/16'' (2mm) |
|
What is required shape of the tamping end of the rod? |
rounded / hemispherical |
|
What is the required minimum frequency of the vibrator used in this test method? |
7000 |
|
The outside diameter or side dimension of the vibrating element shall be at least _____ but not greater than ____ |
.75'' and 1.5'' |
|
A plastic container can be used for the measure in this method. T or F |
True |
|
What is the minimum thickness of a metal strike-off plate? |
1/4'' |
|
What is the minimum thickness for a glass or acrylic strike off plate? |
1/2/'' |
|
What is the specified weight of the mallet used on measures that are 0.5ft^3 [14L] or smaller? |
1.25 +- .5lb |
|
Measures other than air meter bowls used for this test must conform to ASTM |
C29 |
|
Air meter bowls used for this test must conform to ASTM _____ and be calibrated for volume according to ASTM _____ |
C231 and C29 |
|
The concrete sample must be obtained in accordance with what ASTM method? |
C-172 |
|
What method of consolidating must be used when the slump is greater than 3 inches? (75mm) |
Rodding |
|
What method of consolidating must be used when the slump is less than 1 inch (25mm) |
Vibration |
|
if rodding is the method of consolidating used, the measure must be filled in how many layers? |
3 |
|
For a measure of 0.5ft^3 [14L] what is the required number of strokes of the tamping rod for consolidating of each layer? |
25 |
|
When rodding the middle and top layers, the tamping rod should penetrate into the layer below approximately |
1'' |
|
If vibration is the method of consolidating, the measure must be filled in _____ approximately equal layers |
2 |
|
If, after consolidating of the final layer, the concrete level is 1/2 inch (13mm) above the top measure what should be done? |
Remove excess with scoop |
|
After consolidating of the final layer, an excess of concrete ______ above the top of the measure is considered optimum |
1/8'' |
|
After completing the strike off procedure what must be done before weighing the measure and sample? |
clean measure of any excess material |