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A mechanistic-empirical based overlay design method for reflective cracking
Sousa, Jorge B.; Pais, Jorge C.; Way, George B.This paper describes a new and innovative mechanistically based pavement overlay design method that considers the most predominant type of overlay distress observed in the field: Reflective cracking above old cracks in the underlying pavement surface. Both dense-graded hot mix asphalt and gap-graded asphalt rubber (wet process) mixes were studied, in the laboratory and in the field, to derive the necessary mech...
Mode of loading on flexural fatigue laboratory properties of conventional and a...
Sousa, Jorge B.; Pais, Jorge C.; Pereira, Paulo A. A.; Way, George B.Traditionally the correct modeling and prediction of asphalt fatigue mechanisms, has re-lied on the use of the appropriate mode of loading in laboratory tests. The mode of load-ing chosen should, as closely as possible, reflect the mode of loading that causes crack propagation in the field. However recent formulations may be opening the door to the determination of key parameters from either mode of loading. Fa...
Development of a mechanistic-empirical based overlay design method for reflecti...
Sousa, Jorge B.; Pais, Jorge C.; Saim, Rachid; Way, George B.; Stubstad, Richard N.This paper describes a new and innovative mechanistically based pavement overlay design method that considers the most predominant type of overlay distress observed in the field: Reflective cracking above old cracks in the underlying pavement surface. Both dense-graded hot mix asphalt and gap-graded asphalt rubber (wet process) mixes were studied, in the laboratory and in the field, to derive the necessary mech...
Método de dimensionamento de reforços para controlar a reflexão de fendas
Sousa, Jorge B.; Pais, Jorge C.; Saim, Rachid; Way, George B.Esta trabalho descreve um novo método empírico-mecanicista para o dimensionamento de reforços de pavimentos de modo a controlar um dos mais predominantes processos de ruína de pavimentos, a reflexão de fendas. Tanto as misturas convencionais como as misturas descontinuas com betume borracha foram estudadas, tanto em campo como em laboratório, para o desenvolvimento dos modelos mecanicistas e estatísticos. Os m...
An overlay design method for reflective cracking
Pais, Jorge C.; Sousa, Jorge B.; Way, George B.; Stubstad, Richard N.The purpose of this paper is to develop a pavement design method to address reflective cracking using sound mechanistic principles reinforced by practical experience. This paper presents the initial concept of the proposed overlay design method. Test sections have been constructed to assess the effect of overlay thickness, crack width and load to validate the design method. Crack activity under the effect of tr...
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