Analysis of fatigue damage on test sections submitted to HVS loading

Wojciech Bańkowski,Marcin Gajewski,Dariusz Sybilski

doi:10.3846/bjrbe.2013.33

Wojciech Bańkowski, Marcin Gajewski + Show 1 more

Open Access

https://doi.org/10.3846/bjrbe.2013.33

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Abstract

This paper presents results of field tests performed in Poland within SPENS project. The test sections were built in Poland (October 2007). All of construction works as well as research tests were conducted in cooperation with the Swedish National Road and Transport Research Institute (VTI), STRABAG, TPA, Lafarge and ORLEN. The test section was divided into four parts of the same layer thickness, but with two different mixes in the base course: asphalt concrete and high modulus asphalt concrete. This allowed direct evaluation of the influence of high modulus asphalt concrete on pavement durability. Tests sections were subjected to accelerated loading test with use of the Heavy Vehicle Simulator. These tests were accompanied by field tests (Falling Weight Deflectometer and Ground-Penetrating Radar) and numerous of laboratory tests (binder content, grading, air voids, resistance to rutting, stiffness and fatigue). Investigation of fatigue damage development of asphalt layers is also presented. Four pavement structures with different binder courses made of: high modulus asphalt concrete with grains up to16mm and 20/30 binder, asphalt concrete with grains up to16 mm and binder 35/50 and fine graded anti-fatigue layer were compared using accelerated tests and also verification of applied design methods was made.

Highlights

Poland is a country where in recent years considerable resources have been allocated to infrastructure, to the road construction taking into account the interaction of transport system elements (Sivilevičius 2011)
A systematic comparison of selected components of strain measurements obtained from the Accelerated Pavement Tests (APTs) with Finite Element Method (FEM) solutions in the frame of linear theory of visco-elasticity is presented (Park, Kim 2010)
Thicknesses of asphalt layers were different than planned. It means that comparative analysis for four sections tested with Heavy Vehicle Simulator (HVS) is limited, but not impossible

Summary

Introduction

Poland is a country where in recent years considerable resources have been allocated to infrastructure, to the road construction taking into account the interaction of transport system elements (Sivilevičius 2011). Propositions of some solutions that would reduce the degree of degradation in a wide time perspective are needed These goals could be achieved only from models in real scale subjected to a load at an accelerated rate, e.g. by using Heavy Vehicle Simulator (HVS). The main objective of this work was, to identify regions where reflective cracking initiate, and to track the development of crack in the function of the number of load cycles. It needed to prepare a special test road construction and usage of special experimental setup, but eventually the constitutive model of the interface could be validated. The development of permanent deformation is a key issue in the study presented in (Sirin et al 2008) in the context of unmodified and modified asphalt used for mixtures

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