Evaluation of Rheological and Thermic Properties of Neat and Modified Asphalt with a Waste of LDPE

被引:2
作者
Castro Lopez, William Andres [1 ]
Rondon Quintana, Hugo Alexander [1 ]
Barrero Calixto, Juan Carlos [2 ]
机构
[1] Univ Dist Francisco Jose de Caldas, Fac Medio Ambiente & Recursos Nat, Bogota, Colombia
[2] Univ Catolica Colombia, Dept Ciencias Basicas, Bogota, Colombia
来源
INGENIERIA | 2016年 / 21卷 / 01期
关键词
differential scanning calorimetry; LDPE; modified asphalt; rheology; temperature; thermogravimetry;
D O I
10.14483/udistrital.jour.reving.2016.1.a01
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Context: The asphalt technology and modified asphalt mixtures has been widely used and studied, worldwide. Adding polymers to asphalt modifies mechanical, chemical and rheological properties, trying to improve behavior of the mixtures subjected to different environmental and load conditions. 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). Method: 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. Results and Conclusions: 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.
引用
收藏
页码:7 / 18
页数:12
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