Effects of the Characteristics of High Range Water Reducing Agents and the Water to Powder Ratio on Rheological and Setting Behavior of Self-Consolidating Concrete

    ISSN: 2165-3984

    CODEN: ACEMOAD

    Published Online: 13 January 2014

    Page Count: 16


    Schmidt, Wolfram
    BAM Federal Institute for Materials Research & Testing, Berlin,

    Brouwers, H. J. H.
    Eindhoven Univ. of Technology, MB Eindhoven,

    Kuehne, Hans-Carsten
    BAM Federal Institute for Materials Research & Testing, Berlin,

    Meng, Birgit
    BAM Federal Institute for Materials Research & Testing, Berlin,

    (Received 1 August 2013; accepted 4 December 2013)

    Abstract

    To design robust self-consolidating concrete (SCC) for various environmental conditions, it is essential to understand the relevant mechanisms that control the flow performance. This paper depicts how high range water reducing agents (HRWRAs) interact with clinker and hydration phases, and it discusses the important role of the charge density of polycarboxylic HRWRAs in the way the rheology is affected. Based on the rheometric investigations on SCC mixture compositions with different water to powder ratios (w/p) and observations of their pastes' Vicat setting times, the study shows that increasing charge densities of the HRWRA and decreasing w/p reduce the flow retention and have lesser retarding effect on the setting. Based on the test results and discussions optimization procedures for the mixture composition and the HRWRA modification are suggested to achieve optimized performance for varying environmental situations and highest robustness for specific conditions.


    Paper ID: ACEM20130094

    DOI: 10.1520/ACEM20130094

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    Author
    Title Effects of the Characteristics of High Range Water Reducing Agents and the Water to Powder Ratio on Rheological and Setting Behavior of Self-Consolidating Concrete
    Symposium , 0000-00-00
    Committee C09