Recycled concrete powder (RCP) recycling can reduce the consumption of natural resources, which has been highlighted as an ecofriendly and sustainable approach. The alkali-activated slag (AAS) offers notable prospects for replacing conventional Portland cement binders. In this study, we partially replaced granulated blast furnace slag (GBFS) with RCP to prepare the AAS mortars. We evaluated the effect of RCP replacement levels and fineness levels on compressive strength, early hydration process, and pore structure pertaining to AAS mortars with RCP (RCP-AAS mortars). According to the experimental results, using 10 – 30% RCP inside AAS mortars enhanced the compressive strength at 1 day, and the improvement was obvious with increasing RCP fineness. The RCP delayed the early-age hydration of the GBFS, decreased the content of hydration products and increased the total porosity. Therefore, it exhibited a negative effect on 28-day compressive strength. These drawbacks of RCP, however, could be modified by increasing its fineness.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Compressive Strength, Hydration and Pore Structure of Alkali-Activated Slag Mortars Integrating with Recycled Concrete Powder as Binders


    Additional title:

    KSCE J Civ Eng


    Contributors:
    Wang, Hao (author) / Wang, Liang (author) / Shen, Wenfeng (author) / Cao, Ke (author) / Sun, Lei (author) / Wang, Pengju (author) / Cui, Liyun (author)

    Published in:

    Publication date :

    2022-02-01


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Investigation of Hydration Temperature of Alkali Activated Slag Based Concrete

    Akçaözoğlu, Kubilay / Akçaözoğlu, Semiha / Açıkgöz, Abdullah | Springer Verlag | 2017


    Investigation of Hydration Temperature of Alkali Activated Slag Based Concrete

    Akçaözoğlu, Kubilay / Akçaözoğlu, Semiha / Açıkgöz, Abdullah | Springer Verlag | 2018


    Investigation of Hydration Temperature of Alkali Activated Slag Based Concrete

    Akçaözoğlu, Kubilay / Akçaözoğlu, Semiha / Açıkgöz, Abdullah | Online Contents | 2018


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

    Nawaz, Muhammad Asad / Qureshi, Liaqat Ali / Ali, Babar | Springer Verlag | 2021