The aim of this paper is to advance the research on the use of alkali-activated fly ash in recycled concrete aggregate (RCA) bearing mortar (RAM) to achieve low carbon footprint and sustainability in construction. To this end, the present paper explores the advantages in terms of improved properties of RAM by incorporating fly ash with an alkali-silicate activator. Results of testing reveal that compressive strength of RAM is improved by more than 30% by using 20% fly ash with 3–6% silicate-activator. RAM with activated-fly ash showed significant improvement in resistance against water absorption, chloride penetration, and acid attack. The durability parameters are fairly correlated with the compressive strength: improvement in durability performance is noticed with increasing compressive strength, indicating that microstructural developments that yield high mechanical strength also contribute to improvement in durability.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Enhancing the Performance of Recycled Aggregate Mortars Using Alkali-Activated Fly Ash


    Additional title:

    KSCE J Civ Eng


    Contributors:

    Published in:

    Publication date :

    2021-02-01


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Shrinkage Performance of Fly Ash Alkali-activated Cement Based Binder Mortars

    Kheradmand, M. / Abdollahnejad, Z. / Pacheco-Torgal, F. | Online Contents | 2018


    Shrinkage Performance of Fly Ash Alkali-activated Cement Based Binder Mortars

    Kheradmand, M. / Abdollahnejad, Z. / Pacheco-Torgal, F. | Springer Verlag | 2017



    The susceptibility of recycled concrete aggregate to alkali silica reaction

    Calder, A. J. J. / McKenzie, M. | TIBKAT | 2005

    Free access

    Mitigating Alkali–Silica Reaction in Concrete Containing Recycled Concrete Aggregate

    Li, Xinghe / Gress, David L. | Transportation Research Record | 2006