The effect of new tyre type, tyre pressure and axle configurations of heavy trucks on asphalt pavement lifetime
Digital Object Identifier (DOI): dx.doi.org/10.14311/EE.2016.092
There has been an increasing trend in the transportation industries of the Nordic countries over the last decade towards a move to longer and heavier trucks and heavier axle configurations. In Finland in 2013 the allowable total weights and dimensions of heavy trucks were raised from 60 tonnes to 76 tonnes. In Sweden the maximum total weight of trucks will rise to 74 tonnes and in Norway 60 tonnes trucks will be permitted on main roads. In order to assess this trend in Finland the Finnish Transport Agency established a “Weights and Dimensions” project to determine the present condition of the Finnish road network and estimate the effect of new heavier trucks on road loading resistance and lifetime. Outside the Nordic countries other countries will also face the effects of rapidly increasing numbers of super single tyres and higher tyre pressures over the next few years, even those where the total truck weights or axle weights are not being raised. To assess this the ROADEX Network partners commissioned a prestudy project on "The effect of axle and tyre configurations on pavement durability". The aim of the prestudy was to produce a general information package on the effects of different truck options, axle configurations, tyre types and tyre pressure options on pavement structures. This included modelling stresses and strains within the pavement and performing calculations of residual pavement lifetimes for typical pavement structures used in the ROADEX Network area The paper will present the key results of the two projects mentioned above and present some recommendations how pavement management policy should be changed to meet the future challenges.
Bearing capacity, Fatigue Cracking, Freeze-Thaw, Permanent Deformation, Stiffness