%0 Journal Article
%T Modelo reol¨®gico para la transici¨®n de fase sol-gel de fracciones pesadas del petr¨®leo termoenvejecidas
%A Vargas Arenas
%A Xiomara Andrea
%A Afanasjeva
%A Natalia
%A ¨¢lvarez Cifuentes
%A Mario
%J Ingenier¨ªa e Investigaci¨®n
%D 2010
%I Universidad Nacional de Colombia
%X a power-law rheological model is proposed in this paper: g¡ä¡ä (w) ~ wn and g¡ä (w) ~ wn. it represents the increased connectivity between thermo-aged asphalt molecules in a rheo-reactor as one of the applications of systematic rheology. the results confirmed a sol-gel phase transition tendency for aged asphalt in the experimental frequency window at temperatures below 40¡ãc. such pattern could have been related to the structuring effect arising from the thermo-oxidative asphalt aging process during continuous agitation which has been suitably described by the micellar model of asphalt.
%K rheology
%K rheological model
%K asphalt
%K aging.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-56092010000100005&lng=en&nrm=iso&tlng=en