Mechanical Performance of Asphalt Mortar Containing Hydrated Lime and EAFSS at Low and High Temperatures

Ki Hoon Moon; Augusto Cannone Falchetto; Di Wang; Chiara Riccardi; Michael P Wistuba

doi:10.3390/ma10070743

Mechanical Performance of Asphalt Mortar Containing Hydrated Lime and EAFSS at Low and High Temperatures

Materials (Basel). 2017 Jul 3;10(7):743. doi: 10.3390/ma10070743.

Authors

Ki Hoon Moon¹, Augusto Cannone Falchetto², Di Wang³, Chiara Riccardi⁴, Michael P Wistuba⁵

Affiliations

¹ Pavement research division, Korea Expressway Corporation (KEC), Hwa Sung city, Gyung Gi do 18489, Korea. moonx113@umn.edu.
² Department of Civil Engineering, Braunschweig Pavement Engineering Centre-ISBS, Technical University of Braunschweig, Braunschweig 38106, Germany. a.cannone-falchetto@tu-bs.de.
³ Department of Civil Engineering, Braunschweig Pavement Engineering Centre-ISBS, Technical University of Braunschweig, Braunschweig 38106, Germany. di.wang@tu-bs.de.
⁴ Department of Civil Engineering, Braunschweig Pavement Engineering Centre-ISBS, Technical University of Braunschweig, Braunschweig 38106, Germany. chiara.riccardi@tu-braunschweig.de.
⁵ Department of Civil Engineering, Braunschweig Pavement Engineering Centre-ISBS, Technical University of Braunschweig, Braunschweig 38106, Germany. m.wistuba@tu-bs.de.

Abstract

In this paper, the possibility of improving the global response of asphalt materials for pavement applications through the use of hydrated lime and Electric Arc-Furnace Steel Slag (EAFSS) was investigated. For this purpose, a set of asphalt mortars was prepared by mixing two different asphalt binders with fine granite aggregate together with hydrated lime or EAFSS at three different percentages. Bending Beam Rheometer (BBR) creep tests and Dynamic Shear Rheometer (DSR) complex modulus tests were performed to evaluate the material response both at low and high temperature. Then, the rheological Huet model was fitted to the BBR creep results for estimating the impact of filler content on the model parameters. It was found that an addition of hydrated lime and EAFSS up to 10% and 5%, respectively, results in satisfactory low-temperature performance with a substantial improvement of the high-temperature behavior.

Keywords: Bending Beam Rheometer (BBR); Dynamic Shear Rheometer (DSR); Electric Arc-Furnace Steel Slag (EAFSS); Huet model; asphalt mortar; hydrated lime.