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Study of bitumen crystallization by temperature-modulated differential scanning calorimetry and rheology

Published online by Cambridge University Press:  20 March 2012

Jesús López-Paz
Affiliation:
Department of Industrial Engineering, University of A Coruña, Higher Polytechnic School, Campus de Esteiro, Ferrol 15403, Spain
Carlos Gracia-Fernández
Affiliation:
Thermal Analysis, Rheology and Microcalorimetry Applications, TA Instruments—Waters Cromatografía, Alcobendas 20108, Madrid, Spain
Silvia Gómez-Barreiro
Affiliation:
Departament of Applied Physics, CESUGA, University College of Dublin, A Coruña 15190, Spain
Jorge López-Beceiro
Affiliation:
University of A Coruña, Higher Polytechnic School, Campus de Esteiro, Ferrol 15403, Spain
Javier Nebreda
Affiliation:
Corvisa, Productos Asfálticos y Aplicaciones, Madrid 28021, Spain
Ramón Artiaga*
Affiliation:
University of A Coruña, Higher Polytechnic School, Campus de Esteiro, Ferrol 15403, Spain
*
a)Address all correspondence to this author. e-mail: ramon.artiaga@udc.es
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Abstract

Asphalt bitumens are complex colloidal systems of high viscosity and complex behavior, which are mainly used for making asphalt concrete for road surfaces. Thermal and rheological characterizations are needed to understand their complex behavior, particularly at the processing stage. Prediction of properties at short and long observation times is usually performed through time-temperature superposition (TTS) models, which make use of some calculated shift factors. The influence of crystallization-like transformation processes on the validity of these shift factors is investigated here by temperature-modulated differential scanning calorimetry (TMDSC). Four asphalt emulsions are considered in this work, each one with a specific transformation behavior. The structure-properties relationships are explained on the basis of the transformation profiles and rheological data.

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Copyright
Copyright © Materials Research Society 2012

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