Prediction of rut development in asphalt concrete layers

Reference number 2016-03312
Coordinator Statens väg- och transportforskningsinstitut - Statens väg- och transportforskningsinstitut, Linköping
Funding from Vinnova SEK 1 400 000
Project duration October 2016 - October 2019
Status Ongoing
Venture The strategic innovation programme InfraSweden2030
Call 2016-01733-en

Purpose and goal

The aim is to systematize the use of an analytical system for predicting the pavement performance for maintenance and construction of road structures. The goal is demonstration and implementation of a viscoelastic pavement deterioration model called PEDRO, to predict rutting in asphalt pavement layers and to establish a more efficient system for maintenance planning of road through the evaluation of the effects of individual factors on the rutting e.g. effect of various asphalt mixes vehicle combinations.

Expected results and effects

- Implementation and demonstration of PEDRO model for predicting rut growth of bituminous pavement. - Increased knowledge of performance based specification for asphalt concrete mixes against rutting resistance. - Quantification of the effect of variables on rut formation e.g. mix type, lane width, tire type, tire pressure, axle load configuration, vehicle speed, temperature. - Tools for selection of asphalt concrete mixes in design and maintenance work.

Planned approach and implementation

The investigation includes describing factors such as pavement material, temperature and vehicle variables as well as an inventory of the most used tires and the coming new generations of tires that can be more friendly to the road structure. Characterization of material, analysis of traffic and climate data from measurement stations will be performed as input to rut calculations. Simulation of influencing factors e.g. impact of vehicle combinations and pavement structures will be implemented.

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