Browsing by Author "Indacoechea Vega, Irune "

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    Critical factors for the selection of phase change materials for asphalt mixtures: A systematic review
    (HUMANA PRESS INC, 2025) Salvo-Ulloa, David; Indacoechea Vega, Irune; Ossio Herrera, Felipe Ignacio; Castro Fresno, Daniel
    Phase change materials (PCMs) have emerged as a solution to control the in-service temperature of asphalt pavement, minimizing pavement distress and mitigating the effects of the Urban Heat Island (U.H.I.). This review article provides a comprehensive analysis of the critical factors for selecting, incorporating and evaluating a PCM for asphalt mixtures. It explores the types of existing PCMs (organic, inorganic and eutectic) and the methodologies of incorporation into the asphalt mixture according to the PCM format (direct incorporation, carrier materials or encapsulation) and the moment in which it is combined in the asphalt mixture (wet or dry process). It also emphasizes the importance of performing thermal and mechanical tests to verify the properties of the PCM and the impact on the asphalt mixture, together with the conditions under which the PCM is exposed during manufacture, compaction and commissioning of asphalt mixture for a correct selection of the PCM. The results of this review reflect that the most investigated PCM for an asphalt mixture is polyethylene glycol (PEG) and the format of use of PEG has been two carrier materials, SiO2 and Polyacrylamide, while the most used combination in asphalt mixture is the addition of PCM to bitumen before mixing with aggregates. Finally, this review shows that the temperature reduction ranges from 1.5 °C to 10.5 °C and it is noteworthy there is no single solution on the use of a PCM in the asphalt mixture, since it depends on the purpose and the effect to be generated in the pavement.
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    Critical factors for the selection of phase change materials for asphalt mixtures: A systematic review
    (Elsevier Ltd, 2025) Salvo-Ulloa, David; Indacoechea Vega, Irune; Ossio Herrera, Felipe Ignacio; Castro Fresno, Daniel
    Phase change materials (PCMs) have emerged as a solution to control the in-service temperature of asphalt pavement, minimizing pavement distress and mitigating the effects of the Urban Heat Island (U.H.I.). This review article provides a comprehensive analysis of the critical factors for selecting, incorporating and evaluating a PCM for asphalt mixtures. It explores the types of existing PCMs (organic, inorganic and eutectic) and the methodologies of incorporation into the asphalt mixture according to the PCM format (direct incorporation, carrier materials or encapsulation) and the moment in which it is combined in the asphalt mixture (wet or dry process). It also emphasizes the importance of performing thermal and mechanical tests to verify the properties of the PCM and the impact on the asphalt mixture, together with the conditions under which the PCM is exposed during manufacture, compaction and commissioning of asphalt mixture for a correct selection of the PCM. The results of this review reflect that the most investigated PCM for an asphalt mixture is polyethylene glycol (PEG) and the format of use of PEG has been two carrier materials, SiO2 and Polyacrylamide, while the most used combination in asphalt mixture is the addition of PCM to bitumen before mixing with aggregates. Finally, this review shows that the temperature reduction ranges from 1.5 °C to 10.5 °C and it is noteworthy there is no single solution on the use of a PCM in the asphalt mixture, since it depends on the purpose and the effect to be generated in the pavement.
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    Design of cold asphalt concrete with experimental emulsion by magnetic induction
    (2025) Fuente Navarro, Christopher de la; Lagos Varas, Manuel; Lastra González, Pedro; Indacoechea Vega, Irune; Castro Fresno, Daniel
    In this research, a cold asphalt concrete with asphalt emulsion has been developed, which has a structure and mechanical performance equivalent to hot asphalt concrete. The novel asphalt concrete is composed of a new asphalt emulsion and a magnetic industrial by-product, mixed at room temperature, without the need to pre-heat the binder or aggregates. The key to this technology is the use of magnetic induction, which allows the water present in the emulsions to evaporate quickly, facilitating the compaction and curing of the mixture. In order to make a holistic evaluation of the performance of this new “cold” asphalt concrete, rheological and mechanical tests were carried out. The rheological evaluation included tests such as Dynamic Shear Rheometer (DSR), Multiple Stress Creep Recovery (MSCR), Linear Amplitude Sweep (LAS), Binder Yield Energy Test and DSR-Elastic Recovery. The mechanical evaluation included tests such as Marshall Test, Water sensitivity test, Wheel Tracking Test and particle loss test in dry and wet conditions. Regarding the results, cold asphalt concrete presents a mechanical behaviour equivalent to traditional hot asphalt concrete with conventional B50/70, eliminating the need to heat aggregates or binders during the mixing. This represents a significant optimisation of resources and production times.
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    Evaluation of asphalt concrete with residual aramid fibres: Mechanical simulation, abrasion test, recyclability, environmental impact and cost-benefit analysis
    (2025) Delafuente Navarro, Christopher ; Indacoechea Vega, Irune ; Miera Dominguez, Helena ; Lastra González, Pedro ; Ossio, Felipe ; Castro Fresno, Daniel