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The Impact of VMA on the Rheology, Thixotropy and Robustness of Self-compacting Mortars

  • Farid Van Der VurstEmail author
  • Steffen Grünewald
  • Geert De Schutter
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 10)

Abstract

Due to the higher sensitivity of fresh self-compacting concrete (SCC) to small variations in the mix proportions – also referred to as a lower robustness – applications with SCC are still limited. Because viscosity modifying admixtures (VMAs) are often reported to increase the robustness of SCC, the relationship between robustness, rheological characteristics, and thixotropic build-up of self-compacting mortars is examined whit an experimental program. The robustness with regard to small variations in the water dosage is measured together with the rheological and thixotropic properties of mortars made with various admixtures (purified attapulgite clay, diutan gum, corn starch, and propylene carbonate). Based on those results, the possible connections between the rheology, thixotropy and robustness of self-compacting mortar were evaluated.

Keywords

Corn Starch Cement Paste Propylene Carbonate High Performance Concrete Plastic Viscosity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© RILEM 2015

Authors and Affiliations

  • Farid Van Der Vurst
    • 1
    Email author
  • Steffen Grünewald
    • 1
    • 2
  • Geert De Schutter
    • 1
  1. 1.Magnel Laboratory for Concrete ResearchGhent UniversityGhentBelgium
  2. 2.Concrete Structures GroupDelft University of TechnologyDelftThe Netherlands

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