Abstract

CASTRO LOPEZ, William Andrés; RONDON QUINTANA, Hugo Alexander  and  BARRERO CALIXTO, Juan Carlos. Evaluation of rheological and thermic properties of neat and modified asphalt with a waste of LDPE. ing. [online]. 2016, vol.21, n.1, pp.7-18. ISSN 0121-750X.  https://doi.org/10.14483/udistrital.jour.reving.2016.1.a01.

The paper report results from rheological and thermal characterization on conventional 60-70 asphalt cement and 60-70 asphalt cement modified by introducing a waste of low density polyethylene (LDPE). Modification of the asphalt was performed by wet way in a proportion of LDPE/CA=5% with respect to the mass. Rheological (using DSR), Thermogravimetry (TGA) and Differential Scanning Calorimetry (DSC) techniques were performed. The modified asphalt develops a remarkable increase in stiffness and improvement of the performance grade at high temperatures of service. Additionally, the modified asphalt is more resistant to oxidation and aging processes due to heat. However, the asphalt modified showed a decrease in crack resistance at low and intermediate temperatures of service.

Keywords : Differential Scanning Calorimetry; LDPE; modified asphalt; rheology; temperature; Thermogravimetry.

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