In a traffic investigation, the total number of trucks weighed is 117. The detailed axle load information for these 235 trucks is listed in the table below. a- What is the average number of axles per truck? b- Calculate the truck factor for an asphalt pavement (assume Pt=2.5 and SN=5) If the initial design year ADT is 4,000, truck percentage is 20%, traffic annual growth rate is 2%, for an asphalt pavement (assume Pt-2.5 and SN=5) with two lanes in each direction, if the design period is 20 years, calculate the design ESALS. Axle Load (lb) Single Axles Tandem Axles Tridem Axles wwwwww 9000 12000 18000 20000 22000 20000 24000 26000 30000 30000 34000 38000 Number of axles 6 16 264 30 10 36 64 42 24 20 28 44

Q1A In a Marshall test, the percentage of asphalt binder by total weight of aggregate is 5.3%. The bulk specifc gravity of aggregate (G)-2.582, the specifc gravity of asphalt binder (G)=1.000, and the density of water 3 (Yw)=1.000 g/cm. If the voids flled with asphalt (VFA) is 70.0% and the effective asphalt binder (Pbe) is 4.0% by total weight of mixture, determine the following properties: a. The absorbed asphalt binder (Pba) b. The bulk specifc gravity of the compacted mixture (Gmb) c. The voids in mineral aggregate (VMA) d. The voids in total mixture (VTM) e. The theoretical maximum specifc gravity of the loose mixture (Gmm) The effective specifc gravity of the aggregate (Gse) ال

The pavement that need to be constructed is a six-lane divided highway. The present AADT (both directions) of 6000 vehicles is expected to grow at 5% per annum. The percent of traffic on the design lane is 45%. Determine the design ESAL if the design life is 20 years and the vehicle mix is: Passenger cars (1000 lb/axle) 60% 2-axle single-unit trucks (5000 lb/axle) = 30% 3-axle single-unit trucks (7000 lb/axle) 10% %3D Dosign the navement (with the design ESAL calculated in auestion 3a)

The data given below pertain to the design of a flexible pavement. Initial trafic = 1213 cvpd Traffic growth rate = 8 percent per annum Design life = 12 years Vehicle damage factor = 2.5 Distribution factor = 1.0 The design traffic in terms of million standard axles (msa) to be catered would be