RT info:eu-repo/semantics/conferenceObject
T1 Density, adhesion and stiffness of warm mix asphalts
A1 Vega Zamanillo, Ángel
A1 Calzada Pérez, Miguel A.
A1 Sánchez Alonso, Elsa
A1 Gonzalo Orden, Hernán
K1 Warm mix asphalts
K1 Additives
K1 Gyratory compactor
K1 Stiffness modulus
K1 Temperature
K1 Vías terrestres
K1 Roads
AB This study presents the results of different laboratory tests related to the density, adhesion (sensitivity to water test) and rigidity (resilient module) of bituminous mixtures, manufactured at three different temperatures (160 °C, 140 °C and 120 °C), with three additives: a surfactant made up of different amino substances, a paraffin obtained by the Fisher-Tropsch synthesis process which is totally soluble in bitumen, and a synthetic zeolite in powder form which causes the bitumen to micro-foam,. Test samples have been compacted by impact, according to the Marshall method, and kneading, according to gyratory machine. To evaluate these properties an asphalt concrete mixture has been chosen, with a binder, B-50/70, and a maximum size of aggregates of 16 mm, which is usually placed in the surface layer of the pavement. The densities obtained by the two compaction methods are easy to reach. Densities will decrease if the temperature of manufacturing is lower. All mixtures compacted by gyratory machine at different temperatures displayed very good behavior of water sensitivity; but not all mixtures compacted by impact achieved this. The additives improve the adhesion between aggregate and binder. The stiffness moduli decreased in all mixtures for both types of compaction when the temperature was higher, and this reduction is less pronounced in the mixes manufactured with the gyratory compactor. Mixtures with additives tend to reduce the module, except paraffin.
PB Elsevier
SN 1877-0428
YR 2014
FD 2014-12
LK http://hdl.handle.net/10259/4218
UL http://hdl.handle.net/10259/4218
LA eng
NO XI Congreso de Ingeniería del Transporte (CIT 2014)
NO This paper is based on the results for the Fenix Project. The development of the Fenix Project was possiblethanks to the financial contribution of the Center for Technological and Industrial Development (CDTI) within theframework of the Ingenio 2010 programme, through the CENIT Programme.
DS Repositorio Institucional de la Universidad de Burgos
RD 25-abr-2024