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Clay Content - 8 Fill the cylinder to 15.0 inches 9 Let the...

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ASTM D2419 (AASHTO T 176) Standard Test Method for Sand Equivalent Value of Soils and Fine Aggregate Equipment Graduated cylinder, rubber stopper, irrigator tube, weighted foot assembly, siphon Measuring tin 4.75 mm sieve Funnel Bottles (1 gal) for storage of solution Flat pan Clock or watch Mechanical sand equivalent shaker Oven Filter paper Sampling At least 1500 g of –No. 4 material. Procedures 1. Siphon 4 inches of calcium chloride solution into graduated cylinder 2. Funnel a test specimen into the cylinder 3. Tap the cylinder at the bottom to release air 4. Let the specimen stand for 10 minutes 5. Stopper the cylinder, partially invert, and shake to loosen material 6. Shake by hand, or mechanical, or manual shaker 7. Flush the fine materials into suspension by irrigating the material in the cylinder
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Unformatted text preview: 8. Fill the cylinder to 15.0 inches. 9. Let the material stand for 20 minutes. 10. Read and record the level at the top of the clay suspension. Record sedimentation time. If this takes over 30-min, rerun. 11. After clay reading, lower the weighted foot assembly into the cylinder. Subtract 10-in from the level indicated by the top edge of the indicator. This is your sand reading. 12. Calculate the sand equivalency value as the next highest whole number if it is a decimal. 13. Calculate the average value. Calculations Sand Equivalency 100 = Clay Sand SE Significance and Use The test determines the amount, fineness, and character of the clay materials present in the aggregate....
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