26.5. Apply stability correction

Try these first

1. 1.

   What is the standard thickness for a Marshall specimen?

   Hint

   It's specified in the design standards.

2. 2.

   Why is stability correction necessary?

   Hint

   Think about what happens if the thickness varies.

3. 3.

   What is the purpose of applying stability correction?

   • To adjust measured values to standard thickness
   • To reduce the thickness
   • To decrease stability

   Hint

   Consider the role of specimen thickness in stability.

4. 4.

   True or False: A correction factor of 1.00 indicates that no correction is needed.

   • True
   • False

   Hint

   Think about what happens if the thickness is correct.

5. 5.

   A series of Marshall specimens are prepared at different heights. Specimen A (70 mm; stability 480 kg), Specimen B (63.5 mm; stability 520 kg), and Specimen C (66 mm; stability 500 kg). Compute the corrected stabilities and discuss any implications for the mix design.

   Hint

   Look for the proper correction factors from the table.

6. 6.

   Imagine you're presenting stability results in a report. Specimen D had a measured stability of 620 kg but was 72 mm thick. Determine the correction factor and discuss how that affects overall mix performance.

   Hint

   Use the correction factor appropriate for 72 mm to see the adjustment.