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  • Influence of pure portland cement (CEM I) and slag cement (CEM III) on process of alkali carbonate reaction [Elektronski vir]
    Štukovnik, Petra, 1984- ; Bokan-Bosiljkov, Violeta ; Marinšek, Marjan, kemijski inženir
    The paper presents a study about differences and similarities in alkali-carbonate reaction (ACR) process inside concrete prepared with the same carbonate aggregate and different cement binders. Used ... aggregate is typical Slovenian late digenetic dolomite. The first cement binder is pure Portland cement (CEM I) and the second one is Blastfurnace cement (CEM III). The study of the ACR progress was carried out under accelerated conditions simulated by the 1 M aqueous NaOH solution at 60°C, up to 1 year. Analyses on the micro level were carried out using a petrographic microscope and scanning electron microscopy with X-ray microanalysis (SEM/EDS). On the macro level, measurements of specimens length and mass changes as well as compressive and flexural tests were carried out parallel to the microscopic investigations. The first results of the study show that the ACR process is slower in concrete with Blastfurnace cement. However, for both compositions the same products that are results of the ACR are formed. We can conclude that the replacement of the CEM I cement with the CEM III cement does not hinder the initialisation and progress of the ACR. It only shifts the formation of the reaction products to a later time.
    Source: Durability, monitoring and repair of structures [Elektronski vir] (Str. 176-183)
    Type of material - conference contribution ; adult, serious
    Publish date - 2019
    Language - english
    COBISS.SI-ID - 8763745

    Link(s):

    http://www.grad.unizg.hr/_download/repository/5_Proceedings-Novel-Methods-for-Characterization_%281%29.pdf

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