Question

Question 10 The aggregate mix used percent coarse aggregates, 52 percent fine aggregates, respective bulk specific gravities of these mate specific gravity from this total mix) are as follows: for the design of an asphalt concrete mixture consists of 40 and 8 percent mineral fillers. The rials are 2.680, 2.720, and 2.830. The of the asphalt cement is 1.020. Results of tests on specimens prepa aggregate combination and various percentages of ent (by weight of Weight of Specimen (g) Asphln Water Stablity (N) Flow (0.01 in) Asphalt 4.5 1308.7 765.0 5.0 1314.2 772.3 5.5 1318.9 779,7 6.0 1323.3 782.1 6.5 1328.6782.9 703:0 7659 7.851 7.864 7.259 6.254 14 18 The mixture is to be designed for very heavy traffic using the Asphalt Institute criteria. Determine the optimum asphalt content for this mixture. Is the mixture satisfactory? (Hint: assume absorption # 0 and hence Gi.-Gas)

Answer 1