The use of recycled portland cement concrete aggregate in pavement base layers has been associated with the reduction of filter fabric permittivity and the accumulation of calcite precipitate and other materials in pavement subdrainage systems. A mechanism of portlandite dissolution within base-layer pore waters, followed by exposure to atmospheric carbon dioxide via subdrainage systems, and subsequent calcite precipitation is explored using chemical thermodynamic techniques. Ion activities and pH levels are estimated for the equilibrium states of rainwater entering the pavement, base-layer pore water isolated from the atmosphere, and subdrainage water exposed to the atmosphere. Results derived agree with field and laboratory observations of pH levels.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Chemical Approach to Formation of Calcite Precipitate from Recycled Concrete Aggregate Base Layers


    Weitere Titelangaben:

    Transportation Research Record


    Beteiligte:


    Erscheinungsdatum :

    1997-01-01




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Structural Lightweight Concrete Containing Recycled Lightweight Concrete Aggregate

    Wongkvanklom, Athika / Posi, Patcharapol / Khotsopha, Banlang et al. | Online Contents | 2018


    The application of Recycled Concrete Aggregate (RCA) for Hot Mix Asphalt (HMA) base layer aggregate

    Cho, Yoon-Ho / Yun, Taeyoung / Kim, In Tai et al. | Springer Verlag | 2011


    Structural Lightweight Concrete Containing Recycled Lightweight Concrete Aggregate

    Wongkvanklom, Athika / Posi, Patcharapol / Khotsopha, Banlang et al. | Springer Verlag | 2017


    Fabricated recycled aggregate lightweight concrete prefabricated stair

    LI DUN / ZHANG HUI / WANG HUI et al. | Europäisches Patentamt | 2023

    Freier Zugriff