Flat - For this lab it will be 3:1 4 Test the aggregate...

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ASTM D4791 Standard Test Method for Flat Particles, Elongated Particles, or Flat and Elongated Particles in Coarse Aggregate Equipment Proportional Caliper Device Balance Sampling Sieve 1000 grams of aggregate and separate by sieve size. This test will be conducted on aggregates above the 3/8” sieve. Procedures 1. Oven dry unless procedure is being completed by particle count. 2. Sieve and retain material above the No.3/8” sieve 3. Set the caliper device to proportional ratio desired.
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Unformatted text preview: For this lab, it will be 3:1. 4. Test the aggregate specimen in the flat and elongated particle caliper to determine if it passes the test. 5. Place the specimen in flat and elongated pile or not flat and elongated pile 6. Calculate percent flat and elongated for each sieve size greater than the 3/8” sieve by mass. Significance and Use • Flat and elongated particles can sometimes interfere with construction and consolidation...
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