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17 Cards in this Set
- Front
- Back
- 3rd side (hint)
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231 |
Air Content of Freshly Mixed Concrete by PRESSURE METHOD |
Air |
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138 |
Density, Yield, Air Content |
Big 3 |
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173 |
Air Content by VOLUMETRIC METHOD |
This is a method for testing the air content of freshly mixed concrete |
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What are three types of aggregates found in concrete? |
Dense, cellular, lightweight |
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Required length of tamping rod used in the volemetric method? |
At least 4 inches greater than the depth of bowl |
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What is the approx. volume of the measuring cup used to add water to the air meter, in relation to the volume if the air meter bowl? |
0ne percent give or take .04 percent |
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When testing for air content using the volumetric method, what type of alcohol and concentration must be used? |
Isopropyl |
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What is the required weight of the mallet used in the volumetric method? |
A pound and a quarter, give or take half a pound. |
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Using the volumetric method. What is the maximum allowable size aggregate ? |
One and s half inches |
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In the volumetric method, what must be done if the sample contains aggregate larger than an in and a half? |
Wet sieved using a one inch sieve |
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In the volumetric method, how many layers are placed in the measuring bowl? |
Two |
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What is the diameter of the tamping rod? |
5/8 |
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Required minimum frequency of the vibrator used in method 138, |
9000 vibrations per minute |
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Vibrating element must be at least __ but not greater than __ . |
3/4; 1 and half inches |
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Minimum thickness of metal szrike off plate |
Quarter inch |
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Minimum thickness for a glass or acrylic strike off plate |
Half inch |
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Which method is not used for lightweight aggregates |
Pressure method |
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