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48 Cards in this Set
- Front
- Back
ASTM 1064: Concrete cover should be at least _____. |
3 inches (175 cm) |
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ASTM 1064: Containers shall be large enough to provide ____ of cover in all directions around the sensor. |
3 inches (175 cm) |
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ASTM 1064: Temperature measuring devices shall be capable of measuring temperature to +/- ___° through a range of ___° to ___°. |
1°F (0.5°C), 30 to 120 (0° to 50°C) |
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ASTM 1064: All TMDs shall be readable and accurate to +/- ___ at the verification points. |
0.5°F (0.2°C) |
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ASTM 1064: TMDs should be calibrated ____ or ____. |
Annually or whenever there is a question of accuracy |
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ASTM 1064: Leave the TMD in the concrete for at least ____ but not more than ____. |
2 minutes, 5 minutes |
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ASTM 1064: Read and record the temperature to the nearest ____°F. |
1°F (0.5°C) |
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True or False: ASTM 1064: The temperature of the concrete may be measured in a wheelbarrow. |
True |
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True or False: ASTM 1064: The temperature of the concrete may be measured in wall form. |
True |
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True or False: ASTM 1064: A composite sample of concrete is required even if the only purpose for obtaining the sample is to determine temperature. |
False |
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ASTM 1064: What must be done to the sample container prior to sampling the concrete? |
Dampen the container |
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ASTM 1064: What must be done to the concrete surrounding the temperature measuring device after the device is submerged in fresh concrete? |
Gently press the concrete around the device to ensure concrete is touching all sides of the TMD. |
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ASTM 1064: After the temperature of the concrete is read, what is then required? |
Record the reading |
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ASTM 1064: What is one reason to take the temperature of the concrete? |
To verify conformance to requirements |
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True or False: ASTM 1064: A maximum temperature of freshly mixed concrete is specified in ASTM C1064. |
False |
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ASTM 1064: What special procedures are required when taking the temperature of concrete containing large size coarse aggregate (over 3 in. [75 mm.])? |
Wait up to 20 minutes |
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True or False: ASTM 1064: The sample of concrete used for temperature determination must be rodded 25 times. |
False |
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ASTM 138: The diameter of the tamping rod used in this test method is ___. |
5/8" (16mm) |
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ASTM 138: What is the required shape of the tamping end of the rod? |
Hemispherical |
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ASTM 138: What is the minimum frequency of the vibrator used in this test method? |
7000 vibrations/minute |
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ASTM 138: The outside diameter or side dimension of the vibrating element must be at least ___ but not greater than ___. |
0.75 in (19mm), 1.5 in (38mm) |
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True or False: ASTM 138: A plastic container can be used for the measure in this method. |
False |
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ASTM 138: What is the minimum thickness of a metal strike-off plate? |
1/4 in (6mm) |
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ASTM 138: What is the minimum thickness for a glass or acrylic strike-off plate? |
1/2 in (12mm) |
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ASTM 138: What is the specified weight of the mallet used in measures that are 0.5 ft^3 [14L] or smaller? |
1.25 +/- 0.5 Lb (600 +/- 200 g) |
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ASTM 138: Measures other than air meter bowls used for this test must conform to ASTM ____. |
C 29 |
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ASTM 138: Air meter bowls used for this test must Conform to ASTM ___ and be calibrated for volume according to ASTM ___. |
C 231, C 29/C29M |
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ASTM 138: The concrete sample must be obtained in accordance with what ASTM method? |
C 172 |
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ASTM 138: What method of consolidation must be used when the slump is greaterthan 3 in. [75 mm]? |
Rodding |
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ASTM 138: What method of consolidation must be used when the slump is less than 1 in. [25 mm]? |
Vibration |
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ASTM 138: If rodding is the method of consolidation being used, the measure must be filled in how many layers? |
3 |
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ASTM 138: For a measure of 0.5 ft^3 [14 L], what is the required number of strokes of the tamping rod for consolidation of each layer? |
25 |
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ASTM 138: When rodding in the middle and the top layers, the tamping rod should penetrate into the layer below approximately ___. |
1 in. (25 mm) |
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ASTM 138: If vibration is the method of consolidation, the measure must be filled in ___ approximatly equal layers. |
2 |
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ASTM 138: If after consolidation of the final layer, the concrete level is 1/2 in. (13 mm) above the top of the measure, what should be done? |
Remove excess with a trowel or scoop |
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ASTM 138: After consolidation of the final layer, an excess of concrete ___ above the top of the measure is considered optmimum. |
1/8 in |
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ASTM 138: After completing the strike-off procedure, what must be done before weighing the measure and sample? |
Clean around the edge |
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ASTM 231: The pressure method of determining air content can be used on concrete containing ___ ___ aggregate. |
Relatively dense |
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ASTM 231: The pressure method of determining air content cannot be used on concrete containing the following types of aggregate: ___, ___, ___. |
light weight, air cooled blast furnace slags, and aggregates of high porosity |
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ASTM 231: What is the minimum allowable capacity of the measuring bowl used in this test method? |
0.2 ft^3 |
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ASTM 231: What are the required characteristics of the tamping rod used in this test? |
Height of measure + 4in to 24 inches long, 5/8th in diameter, hemispherical tip |
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ASTM 231: What is the specified size of the mallet required for this test method when the measuring bowl has a capacity of 0.5ft^3 (14 L) or less? |
1.25 +/- 0.5 lb |
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ASTM 231: The sample of concrete used for this test is to be obtained in accordance with what ASTM standard? |
C 172 |
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ASTM 231: The maximum size aggregate allowed for this tut method is ___. |
2in. |
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ASTM 231: If the concrete contains aggregate larger than the maximum allowed for this test, the sample must be ___. |
wet sieved |
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ASTM 231: If the concrete sample is to be consolidated by rodding, the measure is filled in ___ layers. |
3 |
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ASTM 231: If the concrete sample is to be consolidated by vibration, the measure is filled in ___ layers. |
2 |
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ASTM 231: When rodding the concrete sample, what is the specified number if strokes required for each layer? |
25 |