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Unformatted text preview: Uncompacted Void Content of Fine Aggregate AASHTO T-304 Tim Boyer CM 442 Pre-Lab Purpose The purpose of this lab is to provide a standard method of determining the loose uncompacted void content of a sample of fine aggregate. Void content provides a description of the aggregate's angularity, sphericity, and surface texture Equipment Cylindrical measure right cylinder of about 100 mL capacity; approximately 39mm inside diameter, 86mm inside height; well sealed at bottom Funnel opening about 12.7 0.6mm diameter Funnel stand capable of holding the funnel firmly in position Glass plate large enough for calibration of cylindrical measure Metal spatula blade approximately 100mm long, 20mm wide Scale or balance accurate and readable to 0.1g Procedure Sampling: For methods A and B, the sample will be washed over a No. 100 and No. 200 sieve and dried and sieved into separate size fractions For Method C, dry a split of the as-received sample Method A Weigh out and combine the following dried fine aggregates: No. 8 to No. 16 44g No. 16 to No. 30 57g No. 30 to No. 50 72g No. 50 to No. 100 17g Total 190g Method B Prepare separate samples of the following No. 8 to No. 16 190g No. 16 to No. 30 190g No. 30 to No. 50 190g Method C Obtain 190 1g sample passing through the No. 4 sieve Mix samples until homogeneous Plug funnel with finger and fill funnel with sample Flatten with spatula and release into cylindrical measure Measure contents to nearest 0.1g Run two more times by recombining with pan and average measurements Record the mass of the empty measure Post-Lab Test Conditions The test conditions for this process were normal for the procedure. Results Volume of Cylindrical Measure = Weight of Aggregate in Measure = Bulk Specific Gravity of Fine Aggregate = % Uncompacted Voids = 100.00 mL 151.45 g 2.38 36.26 % Comments The procedure was followed as written and everything proceeded normally. ...
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This note was uploaded on 04/29/2008 for the course CE 320 taught by Professor Mckinney during the Spring '08 term at Rose-Hulman.
- Spring '08