Effects of Superplasticizer and Viscosity-Modifying Agent on Fresh Concrete Performance of SCC at Varied Ambient Temperatures

  • Wolfram Schmidt
  • Jos Brouwers
  • Hans-Carsten Kühne
  • Birgit Meng
Conference paper
Part of the RILEM Bookseries book series (RILEM, volume 1)

Abstract

Varying ambient temperatures in plants or on construction sites during casting of SCC can cause serious problems affecting the fresh concrete performances, such as rheological properties and setting time, with consequences for the hardened properties in the structure. By sensible choices of the components, the robustness of SCC mixtures against temperature variations can be improved. However, this aspect has not been the focus of intensive research yet. In this study the effects of varied ambient temperatures on the early performance of differently composed SCC mixtures are investigated, with emphasis on changes in rheology, early deformations, heat evolution and setting. Focus is placed on the study of the influence of the polycarboxylate ether molecule type as well as different viscositymodifying agents on the temperature robustness. Effects on the relevance for practical concrete applications are evaluated, which will provide a reliable framework of possible actions on the appropriate use of admixtures for SCC.

Keywords

American Concrete Institute Heat Flow Rate Slump Flow Lower Yield Stress Limestone Filler 
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 2010

Authors and Affiliations

  • Wolfram Schmidt
    • 1
  • Jos Brouwers
    • 2
  • Hans-Carsten Kühne
    • 1
  • Birgit Meng
    • 1
  1. 1.BAM Federal Institute for Materials Research and TestingBerlinGermany
  2. 2.Eindhoven Technical UniversityEindhovenThe Netherlands

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