RT info:eu-repo/semantics/conferenceObject
T1 Study on the conservation of bituminous mixes in high mountain roads and coastal zones
A1 Vega-Zamanillo, Ángel
A1 Juli-Gándara, Luis
A1 Calzada Pérez, Miguel A.
A1 Teijón-López-Zuazo, Evelio
K1 Infraestructuras
K1 Infrastructures
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
K1 Vías terrestres
K1 Roads
AB The main objective of road conservation is to maintain the characteristics of the platformelements to ensure that vehicle mobility is carried out comfortably and safely. Theorographic conditions of Spain, with a large length of high mountain roads and others atsea level; and winter weather events, with low temperatures, wind, water, ice, snow,…,which cause deposits of particles, filler, soils, small metals, or sea salt on the pavementsurface, can be dangerous in the circulation of vehicles.One of the traditional methods for maintaining wheel-pavement adhesion is to apply fluxproducts, mainly salt (sodium chloride, NaCl) and calcium chloride (Cl2Ca), solidly orhumidified (salt brine). This chemical fluxes have the property of preventing the formationof ice as antifreeze, or facilitating their melting if it has already formed.This research studies the influence of salt in the surface layer of pavement made of hot mixasphalt with conventional binder. The effect of the salt is analyzed under three differentconditions: immerse the specimens in salt water; add salt as aggregate in the manufactureof the mix; and submerging the natural aggregate in water with several amounts of salt, dryit and then manufactured the mixture with it. The mechanical parameters of the mixturehave been analyzed in the laboratory: density, air voids, adhesion, indirect tensile strengthand plastic deformation. To do this, Marshall test, Water Sensitivity Test (ITSR) andWheel Tracking Test have been performed.The properties of hot mix asphalt do not decrease significantly when it is manufactured ofsalt added as aggregate, neither when it is submerged in salt water. The bituminous mixtureoffers negative results when it is manufactured with natural aggregate submerged in waterwith salt previously, because the adhesion between the aggregate and the binder is low.
PB Universidad de Burgos. Servicio de Publicaciones e Imagen Institucional
SN 978-84-18465-12-3
YR 2021
FD 2021-07
LK http://hdl.handle.net/10259/6891
UL http://hdl.handle.net/10259/6891
LA eng
NO Trabajo presentado en: R-Evolucionando el transporte, XIV Congreso de Ingeniería del Transporte (CIT 2021), realizado en modalidad online los días 6, 7 y 8 de julio de 2021, organizado por la Universidad de Burgos
DS Repositorio Institucional de la Universidad de Burgos
RD 18-abr-2024