Uncompacted voids

# Uncompacted voids - 6 Determine the mass of the cylinder to...

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ASTM C 1252-03 Standard Test Methods for Uncompacted Void Content of Fine Aggregate Equipment Cylindrical Measure Funnel and stand Glass plate Pan Metal spatula Scale Sampling 190 grams of fine material from the stockpile Procedures 1. Mix the samples until they are homogeneous. 2. Place a finger over the hole in the funnel, and pour the material into the funnel. 3. Level the material in the funnel with a spatula. 4. Remove your finger and let the material fall 5. Once the funnel is empty, scrape excess material off cylinder with one pass of the spatula. DO NOT SHAKE THE CONTAINER!
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Unformatted text preview: 6. Determine the mass of the cylinder to the nearest 0.1 gram. 7. Run the test again. 8. Calculate the uncompacted voids. Calculations • Uncompacted voids 100 ×-= cylinder fine fine cylinder V G M Volume U Significance and Use • This test can help determine water demand if hydraulic cement is being made. • It also makes an impact on the flowability, pumpability, and workability factors of the aggregate in concrete. • In asphalt, uncompacted voids makes a difference in the stability of the mix....
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