Examinando por Materia "Asphalt emulsion"

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    Publicación
    Comportamiento de una mezcla asfáltica en frio elaborada con arcilla expandida
    (Universidad EAFIT, 2025) Rodríguez Useche, Bladimir de Jesús; Vidal Valencia, Julián
    The increasing need to use alternative aggregates to replace natural stone aggregates in the production of asphalt mixtures has led the road construction industry to evaluate the behavior of new materials, including expanded clays. This research evaluates the physical and mechanical behavior in the laboratory of a cold asphalt mixture (CMA) made with expanded clay, in which the natural aggregates were completely replaced by Arlita, expanded clay, and the bulk density, void percentage, permeability, abrasion loss, indirect traction, resilient modulus, elastic modulus and permanent deformation were measured. A comparative method was used to analyze the experimental results with the general specifications for road construction of the National Institute of Roads of the Republic of Colombia (INVIAS); the document also presents the benefits and limitations of the asphalt mixture.
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    Publicación
    Mezcla en frío para reparaciones, producida con carpeta asfáltica reciclada, emulsión asfáltica y cemento hidráulico
    (Universidad EAFIT, 2025) Cajiao Pérez, Giselle Vanessa; Vidal Valencia, Julián
    In the department of Cesar, Colombia, there are roads managed by the National Road Institute (INVIAS) that are in fair condition due to structural and functional failures caused by traffic loads, ambient temperature, and lack of maintenance. Given the high operating costs, it is evident that the deterioration of the asphalt wearing course must be rapidly reduced, both for user safety and to preserve the lifespan of the pavement structure. Therefore, a cold asphalt mix was prepared with RAP (Reclaimed Asphalt Pavement) as an alternative aggregate, adding slow-setting cationic asphalt emulsion (CRL-57) and general-purpose hydraulic cement (UG). Different material dosages were used using the Marshall method of mix design, with the goal of establishing an optimal dosage, evaluating their physical and mechanical properties, and performing test and monitoring repairs to demonstrate their durability. These repairs did not exceed one month and have now gone six (6) months without showing any deterioration. Laboratory tests of granulometry and asphalt content of the RAP and Marshall method on the test specimens were carried out in the pavement laboratory of the EAFIT University.