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hw1 - No 100(0.15mm 46.3 Pan 19.1 6 What is the difference...

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Dr. Marwa Hassan [email protected] CM3400: Assignment No. 1 Due Date: Wed. Feb. 11 th 2009 1. Calculate the deformation in a 15-ft, 2sq-in.steel bar hanger that supports an 18- ton load. 2. A mechanical device rests in a level position on two supports, each 42in. high, at 60 o F. The support at one is gray cast iron; at the other end, structural steel. What is the greatest amount the device can be out of level due to differences in expansion if the temperature rises to 165 o F? 3. Please solve problem 1.2 in the textbook (Chapter 1). 4. Please solve problems 5.8 (Moisture Content (%) = Mass of Water x 100 / Mass of Solids) and 5.13. 5. Using the following data, determine the percentage retained, cumulative percentage retained, and percentage passing for each sieve. Plot the gradation curve. Determine the effective size and uniformity coefficient. Sieve size Weight retained (g) No. 4 (4.76mm) 10.2 No. 8 (2.36mm) 81.6 No. 16 (1.18mm) 92.3 No. 30 (0.6mm) 122.8 No. 50 (0.3mm) 116.2
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Unformatted text preview: No. 100 (0.15mm) 46.3 Pan 19.1 6. What is the difference between tar and asphalt cement. 7. What are the two main types of asphalt plant and what are the fundamental differences between them? 8. What is the function of the pugmill in a batch mix plant? 9. What are the main three distresses considered in the SuperPave binder specification system? What are the tests and performance parameters considered to judge the binder performance against these distresses? Explain the rationale behind selecting these performance parameters. 10. A binder tested at 64°C using the DSR gave the following results: a. Unaged state: G* = 1000Pa and δ = 40° b. RTFO: G* = 1850Pa and δ =48° Determine if this binder passes the permanent deformation criteria at 64°C. 11. What is the significance and the use of each one of these tests: a. RTFO procedure b. Rotational viscometer test c. Dynamic shear rheometer...
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