Benkelman Beam deflection analysis was carried out on 10 selected points of a flexible pavement using a dual wheel load of 4085 kg and 5.6 kg/cm² pressure. Selected Points 1 2 3 4 5 6 7 8 9 Determine the thickness of bituminous overlay using the following data: 10 Deflection (mm) 1.32 1.35 1.60 1.45 1.40 1.52 1.55 1.65 1.61 1.43 1. Present Traffic = 1500 cvpd 2. Pavement temperature = 30°C 3. Correction factor for moisture = 1.3 4. Annual rate growth of traffic = 7.5%

In the conventional laboratory compression test, what is the cause of soil volume decrease?

A conventional flexible pavement has been periodically checked for accumulated permanent deformations in various layers using a multi-depth deflectometer (MDD). The following subgrade soil rut data were obtained: Subgrade Soil Rut (in.) Number of 18-kip Axle Loads 0.1 10,000 0.225 100,000 Estimate the rut depth contributed by the subgrade soil for 1-million 18-kip axle loads.

1. During the AASHO road test, ONLY flexible pavements were constructed and tested.a. Trueb. False2. The AASHO present serviceability rating (PSR) was considered an objective quantity used to establish the performance of highway pavement in terms of applied traffic.a. Trueb. False3. The AASHTO present serviceability index (PSI) correlates the PSR to actual pavement performance in terms of applied traffic, and select distresses.a. Trueb. False4. There is only one AASHTO PSI equation that applies to both flexible and rigid pavements.a. Trueb. False5. The AASHTO PSI scale ranges from:a. 0-5b. 0-10c. 0-100d. None of the above