During the last few years, polycarboxylate based polymers have become very popular, especially in self consolidating concrete (SCC). These polymers contain a polycarboxylic backbone onto which ethyleneoxide side chains have been grafted. However its dispersing and slump keeping properties vary significantly, depending on the chemical structure. This article reports on a study of the dispersing properties of two polymers having a different number of polyoxyethlene (PEO) graft chains relative to the length of the backbone. The polymers were evaluated in cement paste by measuring adsorption on cement paste and flow properties in different mortar compositions. The results showed that the effects of the polymers on the fluidity and the retention of flow of the cementitious systems are significantly different. While one polymer gives a very strong initial water reduction, the second one shows excellent flow retaining properties. The authors conclude that, when combined, the two polymers are well suited for the production of RMC (ready mixed concrete) and SCC mixes with different cements and in different climate zones. This paper was presented at a symposium on cement-admixture interactions (December 2003, Tampa, Florida).

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    ASTM International

    100 Barr Harbor Drive
    West Conshohocken, PA  United States  19428-2959
  • Authors:
    • Mader, U
    • Schober, I
    • Wombacher, F
    • Ludirdja, D
  • Publication Date: 2003-12


  • English

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  • Accession Number: 00986562
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 22 2005 12:00AM