**Homework Assignment \-\--A**

**Superpave PG Grading Systems**

Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

Date:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

1.  Use the Superpave software provided to determine the average 7 day
    high and 1-day minimum low pavement temperature and standard
    deviations for the following locations.

-   Anchorage, Alaska

-   Phoenix, Arizona

-   Orlando, Florida

-   Cincinnati, Ohio

-   Boston, Massachusetts

2.  Select a PG grade to use in each of the above locations. Use the
    maximum and minimum temperatures plus 2 standard deviations.

3.  What is the PG grade of the asphalt whose results are shown in Table
    1?

**TABLE 1. Asphalt Cement Test Results.**

+---------------------------------------------+------------------------+
| Properties                                  | Asphalt No. 1          |
+---------------------------------------------+------------------------+
| Original Properties                         |                        |
+---------------------------------------------+------------------------+
| Flash point temperature, ^o^C               | 257                    |
+---------------------------------------------+------------------------+
| Viscosity at 135^o^C                        | 0.259 Poise            |
+---------------------------------------------+------------------------+
| Dynamic shear                               | 0.74                   |
|                                             |                        |
| G\*/ sin δ at 58^o^C                        | 1.05                   |
|                                             |                        |
| G\*/ sin δ at 64^o^C                        | 1.90                   |
|                                             |                        |
| G\*/ sin δ at 70^o^C                        |                        |
+---------------------------------------------+------------------------+
| Rolling Thin Film Oven Aged Binder          |                        |
+---------------------------------------------+------------------------+
| Dynamic shear                               | 1.68                   |
|                                             |                        |
| G\*/ sin δ at 58^o^C                        | 2.34                   |
|                                             |                        |
| G\*/ sin δ at 64^o^C                        | 3.98                   |
|                                             |                        |
| G\*/ sin δ at 70^o^C                        |                        |
+---------------------------------------------+------------------------+
| Rolling Thin Film Oven and PAV Aged Binder  |                        |
+---------------------------------------------+------------------------+
| Dynamic shear                               | 2258                   |
|                                             |                        |
| G\* sin δ at 22^o^C                         | 2987                   |
|                                             |                        |
| G\* sin δ at 25^o^C                         | 3879                   |
|                                             |                        |
| G\* sin δ at 28^o^C                         |                        |
+---------------------------------------------+------------------------+
| Creep Stiffness                             | [S                     |
|                                             | m-value]{.underline}   |
| Stiffness and m-value at -6^o^C             |                        |
|                                             | 225 0.359              |
| Stiffness and m-value at -12^o^C            |                        |
|                                             | 259 0.310              |
| Stiffness and m-value at -18^o^C            |                        |
|                                             | 289 0.287              |
+---------------------------------------------+------------------------+