The South African mechanistic design method, which was verified using results from the Heavy Vehicle Simulator program, is used to derive mechanistic equivalency factors, MEFs. The MEF is defined as the ratio between the number of repetitions of a standard 80kN axle until the pavement fails to the number of repetitions until failure occurs under the actual load. For the particular pavement type considered in the paper the results obtained by the MEF-method correlate very well with the results from the AASHO-formula especially at the higher end of the load spectrum. The MEF-method enables one to take the specific pavement characteristics into account, to calculate the effect of different tire pressures on pavement damage, to take into account the composition of the heavy vehicle component at the specific location and to differentiate between damage to the surfacing and bottom layers.
Load Equivalency Factors for Heavy Vehicles
1986
23 pages
Report
No indication
English
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