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TEST METHOD FOR UNCOMPACTED VOID CONTENT OF FINE AGGREGATE: As Influenced by Particle Shape, Surface Texture, and Grading Objective: To introduce the student to Superpave performance-based asphalt mix design aggregate tests. Reference: AASHTO T 304 Tennessee DOT Superpave Design Course Manual Chapter 4 General: In 1987, Strategic Highway Research Program (SHRP) began developing a new system for specifying asphalt materials. The final product of the SHRP asphalt research program is a new system referred to as Superpave which stands for Superior Performing Asphalt Pavements. Superpave is an improved system for specifying component materials, asphalt mixture design and analysis, and pavement performance prediction. The system includes test equipment, test methods, and criteria. The following lab should be considered only a brief introduction to the system's aggregate properties. Apparatus: AASHTO T 304 Uncompacted Voids Device Pans Balances Procedure: 1. To remove the influence of gradation on void content, we will use a standard graded 190 gram sample as recommended by TDOT. To save class time, three samples of each aggregate (American Limestone Springfield screenings (BSG = 2.723) and Ohio River sand (BSG = 2.579)) will be prepared and oven-dried by the lab assistants before lab. 2. Obtain a tare weight for the cylindrical reservoir. 3. Cover the funnel reservoir's lower opening with your index finger. Fill the funnel reservoir with the sample. Remove your index finger and allow the aggregate to flow into the cylindrical reservoir. Prevent vibration of the apparatus during testing. 4. Strike of the cylindrical reservoir with a single pass of a spatula. 5. Tap the cylindrical reservoir with the spatula to densify the aggregate and thus avoid spilling it during cleaning and weighing. 6. Clean the excess aggregate off the exterior of the cylindrical reservoir with a brush. 7. Weigh the cylindrical reservoir. 8. Calculate U, the uncompacted percent air voids: U = {[ V - (W / BSG)] / V} * 100 % where: V = volume of cylindrical reservoir (ml) W = net weight of aggregate in cylindrical reservoir (g) BSG = bulk specific gravity of fine aggregate 9. Repeat the test for each of three samples of each aggregate. 10. Report the average U value for each aggregate and whether this value met TDOT specifications for a surface course with 15 million ESAL traffic over it’s service life. please i want introduction, conclusion , procedure , and please answer all the questions.