This study evaluated the effects of substituting natural coarse aggregate (dolomite) with air-cooled blast furnace slag (ACBFS) on the strength and durability properties of pavement concretes. The scope of the study included evaluation and analysis of four types of concrete subjected to three deicers [calcium chloride (CaCl2), magnesium chloride (MgCl2), and sodium chloride (NaCl)] while undergoing freeze–thaw (FT) exposure. Of the four types of concrete mixtures, two were prepared with ACBFS and two with natural dolomite as coarse aggregate. For each aggregate type, one mixture was produced with Type 1 portland cement, while the second one was produced with a binder composed of Type 1 cement and Class C fly ash (20% replacement by weight). Fresh properties of concrete tested included slump, unit weight, and total air content, while compressive and flexural strengths were measured for hardened concrete. Durability of concrete exposed to FT was assessed by periodically measuring dynamic modulus of elasticity of concrete and average depth of chloride penetration. Concrete with ACBFS aggregates developed slightly higher (~6%) compressive strength but lower (~15%) flexural strength than did concrete with natural dolomite. Periodic measurements of dynamic modulus of elasticity and visual observations of test specimens showed that of the three deicers used, the CaCl2 was the most aggressive, followed by MgCl2 and NaCl. In regard to resistance to the FT cycles in the presence of deicers, fly ash concretes (with either ACBFS or dolomite as coarse aggregate) showed better performance than did corresponding plain cement concretes.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Pavement Concrete with Air-Cooled Blast Furnace Slag and Dolomite as Coarse Aggregates


    Subtitle :

    Effects of Deicers and Freeze-Thaw Cycles


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2019-04-04




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Blast Furnace Slag as Sustainable Material in Concrete Pavements

    Jahangirnejad, Shervin / Van Dam, Thomas / Morian, Dennis et al. | Transportation Research Record | 2013


    Blast Furnace Slag as Sustainable Material in Concrete Pavements

    Jahangirnejad, Shervin | Online Contents | 2013



    Efficient slag grabbing system for blast furnace granulated slag

    WANG DEGANG / JIN ZHENG / DUAN GUOJIAN et al. | European Patent Office | 2020

    Free access

    Skidding Characteristics of Pavement Surfaces Incorporating Steel Slag Aggregates

    Stock, A. F. / Ibberson, Colin M. / Taylor, I. F. | Transportation Research Record | 1996