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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/196544
Sustainable asphalt mixtures by partial replacement of fine aggregates with low-grade magnesium carbonate by-product
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The utilisation of large quantities of raw materials for asphalt mixtures manufacturing, such as aggregates, is an environmental issue that must be addressed. This concern has led to valorising waste and by-products as more sustainable alternative raw materials. This research is aimed at evaluating the use of a low-grade magnesium carbonate (LG-MC) by-product as a partial replacement of fine aggregates and as a filler of asphalt mixtures. A mechanical analysis has been performed studying the effect of this by-product on the moisture sensitivity, cracking resistance and cohesion loss resistance of asphalt mixtures. Cracking resistance was assessed under different temperatures (20, 5 and -5 ºC) and conditions (unconditioned and aged). Results indicated that moisture sensitivity and cohesion loss resistance of asphalt mixtures with LG-MC by-product were not affected, obtaining similar results to those of the reference mixture. A protective effect in the mixture cracking resistance was observed using LG-MC. At low temperatures or after ageing, this by-product tends to maintain ductility to a greater extent. The study indicates that LG-MC is suitable as a partial substitute for the fine fraction of aggregates, as well as for the total amount of filler in asphalt mixtures manufacturing for road pavements.
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LÓPEZ-MONTERO, Teresa, MAÑOSA BOVER, Jofre, MIRÓ, Rodrigo, CHIMENOS RIBERA, Josep ma.. Sustainable asphalt mixtures by partial replacement of fine aggregates with low-grade magnesium carbonate by-product. _Case Studies In Construction Materials_. 2022. Vol. 18, núm. 1-14. [consulta: 20 de gener de 2026]. ISSN: 2214-5095. [Disponible a: https://hdl.handle.net/2445/196544]