Bituminous base courses for flexible pavements with steel slags
- Marta Skaf Revenga 1
- Javier Bartolomé González 1
- Hernán Gonzalo Orden 1
- Alaitz Linares Unamunzaga 1
- Vanesa Ortega López 1
- Juan Manuel Manso Villalaín 1
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1
Universidad de Burgos
info
- Hernán Gonzalo Orden (ed. lit.)
- Marta Rojo Arce (ed. lit.)
Editorial: Servicio de Publicaciones e Imagen Institucional ; Universidad de Burgos
ISBN: 978-84-18465-12-3
Año de publicación: 2021
Páginas: 675-684
Congreso: Congreso de Ingeniería del Transporte (14. 2021. Burgos)
Tipo: Aportación congreso
Resumen
The purpose of this research was to study the feasibility of incorporating steel slags into coarse bituminous mixtures. The objective was twofold: to reduce dependence on natural aggregates, and to provide a use for industrial by-products. The slags studied come from the manufacture of carbon steel in electric furnaces and are divided into two types: Electric Arc Furnace (EAF) slag and Ladle Furnace (LF) slag. The mixture designed is coarse bituminous concrete (AC22G), for base courses in flexible pavements. In a first phase, the physical characterization of the materials was carried out to check their suitability. In a second phase, three types of mixes were designed: a control mix (made with natural limestone aggregates), a mix where LF slag was introduced to replace the filler and the fine fraction (sand) of the mix; and finally, the feasibility of manufacturing a totally sustainable mix was analyzed, which would fully incorporate EAF slag as coarse aggregate and LF slag as fine aggregate and filler. In a third and final phase, the designed mixes were subjected to different mechanical, water sensitivity, and durability tests. The research demonstrated that the incorporation of EAF and LF steel slag as a substitute for natural aggregate in coarse bituminous mixtures is feasible, meeting regulatory requirements, improving sustainability in the construction industry, as well as reducing emissions, and contributing to climate change mitigation.