Properties of plain concrete (PC) and steel fiber reinforced concrete(SFRC) (with water/cement ratio of 0.44, 0.32 and 0.26) subjected to freeze-thaw cycles in 5.0% sodium sulfate solution were investigated in this paper. It was found that during the initial 300 freeze-thaw cycles, sulfate solution had little effect on the relative dynamic modulus of elasticity (E(d)) of concrete. In further freeze-thaw cycling, the effect of sulfate solution on E(d ) was much more obvious. Both PC and SFRC specimens with w/c of 0.44 failed before 300 cycles and exhibited similar developing trends of the E(d) whether freezing and thawing in sulfate solution or in fresh water. As for the concrete specimens with w/c of 0.26, the decline of E(d) was more serious when freezing and thawing in sulfate solution than that in fresh water after 300 cycles. The adoption of steel fiber greatly restrained the decline of E(d) and changed the failure mode of the specimen from brittle crack in midspan of PC to gradually decline of E(d) up to failure under the combined action of freeze-thaw cycles and sulfate attack. Test results also demonstrated that there was an interaction effect between the action of freeze-thaw cycles and sulfate attack.


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    Titel :

    Effect of sulfate solution on the frost resistance of concrete with and without steel fiber reinforcement


    Beteiligte:
    Miao, Changwen (Autor:in) / Mu Ru (Autor:in) / Tian Qian (Autor:in) / Sun, Wei (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2002


    Format / Umfang :

    4 Seiten, 5 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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