PERMANENT DEFORMATIONS OF ASPHALT MIXTURES FROM PAVEMENT WEARING COURSES

Adrian Burlacu, Carmen Racanel

Last modified: 2017-02-28

Abstract


Asphalt mixture it is the material in a high percentage in a flexible road structures. Depending on the layer that is used: the base layer or wearing course, it must respond to loads coming from traffic and climate. Asphalt mixture from wearing course must take tangential forces produced by vehicle’s wheels and to transmit vertical loads to the bottom layers, to support loads from climate factors, to provide sufficient rigidity so as to contribute to increase resistance of the road structure, to be waterproof and with enough roughness, to drain runoff. Because of traffic increasing and climate changeson flexible asphalt pavement appear degradations like permanent deformations, fatigue cracking and low temperature craking. These degradations reduces the life of road structures and increase maintenance costs.
The present paper aims to highlight the measurement in laboratory of one of the asphalt mixture characterics, namely the dynamic creep test studying the influence of loading conditions on the values obtained.
The results obtained from calculus are presented like influence graphs.

Keywords


asphalt mixture, permanent deformations, dynamic creep, creep modulus, creep rate

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