Received: February 08, 2018;   Published: February 19, 2018

DOI: 10.32474/TCEIA.2018.01.000116

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Abstract

The paper deals with finite element modelling of the test carried out on plate samples made of asphalt mixture and reinforced with glass grid. The apparatus constructed for testing of plate samples in the large scale is modelled in detail as a contact problem. All materials are assumed to be linearly elastic and isotropic, and stiffness modulus of the asphalt mixture is determined on the samples cut out from the plate. The finite element solutions of the static indentation of the sample resting on elastic support with a circular steel indenter have shown that the grid reinforcement influence the overall behavior of the sample only in non-standard loading cases causing inhomogeneity of stress and strain fields or when the ratio between stiffness of the reinforced material and reinforcement material is particularly high (for example in case of asphalt mixtures at higher temperatures). The second conclusion was proven experimentally in the fatigue test carried out on reinforced and non-reinforced asphalt (HMAC 16 20/30) plate in two different temperatures equal to 10 and 30[ ]. In the higher temperature the maximum norm of the vertical displacement is increasing faster for non-reinforced plate than for the reinforced one.

Keywords: Pavements; Reinforcement; Experimental testing; Grids; FEM; Modelling

Abstract| Introduction| The Apparatus for Evaluation the Influence of O Grid Reinforcement on the Pavement Behaviour| Fem Model of the Test Apparatus and Analysis of the Tests with Statical Loading| The Results of Exemplary Fatigue Tests| Conclusion| References|