AbstractsBusiness Management & Administration

"This project involves two main sections. Section 1 involves determining if there is atly significant difference in permeability between two types of asphalt mixes used in the Rockhampton area. These mixes are called the "new" mix and the "old" mix. The main difference between these two mix types is that the "new" mix has a reduced bitumen content and modified grading in an effort to increase it's stability. It was found from both laboratory and field permeability tests that there was no significant difference in the permeabilty of these two mix types. In section 2 of this_ project the relationship between asphalt permeability and such factors as bitumen content, grading and compaction was examined. Laboratory permeability testing was carried out on 27 separate trial mixes. It was found by tying this data from section 2 in with the data obtained from section 1, that compaction had the greatest affect on the permeability of an asphalt mix. A relationship was also found between Characteristic Coefficient of Permeability and % Voids by Volume in Total Mix. This relationship found to be a log - log relationship in the form of a power function : log (perm) = 6 . 13log (voids) - 4. 82"  – summary.