The backcalculation of pavement layer moduli from Falling Weight Deflectometer (FWD) measured surface deflections is a challenging task. It can also be formulated as a global optimization problem with the objective of finding the optimal pavement layer moduli values that minimize the error between measured and computed surface deflections. Over the years, several backcalculation methodologies h...

Abstract Airport pavements are widely constructed as airport runways, taxiways, and aprons. The traffic should be considered during the design stage of before construction. To protect from negligent overload, a pavement strength rating system an aircraft load classification adopted. Under systems developed by International Civil Aviation Organization (ICAO), Aircraft Classification Number (ACN)...

To determine the effect of tractor driving system type on soil compaction and behavior a series tests was conducted using Goldoni 240 with power rate 30.8 kW included four similar tires at three different systems (4WD, rear-wheel drive (RWD) front-wheel (FWD)). evaluate these systems’ effects compaction, were moisture contents (10, 15 20% d.b.), tire inflation pressures (170, 200 230 kPa), spee...