Abstract Stone Mastic Asphalt, SMA, is widely used in the provincial roads in the Netherlands as surface layers due to its excellent performance and long lifespan of 15–20 years. However, this SMA mixture is made with 100% new materials and no recycling is permitted due to quality concerns. Together with provinces Gelderland, Noord-Brabant, Overijssel and Dutch Ministry of Transport (Rijkswaterstaat), sustainable SMA variants are developed in this paper with high quality, 80% of recycling and can be produced at low production temperature of 115 °C. The high quality SMA mixtures with up to 80% recycling are designed with reclaimed aggregate fractions (with bitumen content less than 1%) and bitumen-rich mortar fractions (with bitumen content 10–12%) obtained from an innovative decomposition technique with the support of the European Life+ program. To achieve the low production temperature of 115 °C, two foaming technologies have been applied, namely bitumen foaming and mortar foaming. With the positive results of the laboratory research, in July 2018, total 4 km demonstration sections, with sustainable SMA mixtures containing up to 80% recycling and produced at 115 °C, have been constructed successfully in two Dutch provincial roads N317 and N625 in Gelderland and Noord-Brabant.


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    Title :

    Sustainable Warm In-plant SMA Mixtures with 80% Recycling and Produced at 115 °C


    Contributors:
    Qiu, Jian (author) / Huurman, Rien (author) / Demmink, Ernst (author) / Frunt, Mark (author)


    Publication date :

    2019-08-30


    Size :

    11 pages





    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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