Rheologica Acta

, Volume 52, Issue 5, pp 395–401 | Cite as

A rheological phase diagram of additives for cement formulations

  • Rossana Pasquino
  • Fabio Nicodemi
  • Veronica Vanzanella
  • Roberta Alfani
  • Nino Grizzuti
Original Contribution
First Online:
Received:
Revised:
Accepted:

Abstract

A detailed rheological study of aqueous solutions of methylhydroxyethylcellulose has been carried out in the presence of different acrylate-based graft polymer used as additive contents. Both polymer components are used in cement formulations to improve the flow performances of the concretes, but no physicochemical studies can be easily found in the literature. The content of the graft polymer has been varied between 0.1 and 2.7 wt% in an aqueous solution with a fixed content of 6.5 wt% of methylhydroxyethylcellulose. Creep curves were performed at different stresses in order to build up the flow curves for the various solutions. We found that the addition of the graft polymer triggers a phase transition, which is made more dramatic by the presence of an external flow. A “flow-phase diagram” has been obtained, which could be used as a guide for determining the critical conditions for the onset of the flow-induced instability.

Keywords

Creep Cement admixtures Shear-induced structure formation 
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Notes

Acknowledgments

The financial support of CTG Italcementi Group is grateful acknowledged. F.N. thanks CTG Italcementi Group for a graduate fellowship.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Rossana Pasquino
    • 1
  • Fabio Nicodemi
    • 1
  • Veronica Vanzanella
    • 1
  • Roberta Alfani
    • 2
  • Nino Grizzuti
    • 1
  1. 1.Department of Chemical EngineeringMaterials and Industrial ProductionNapoliItaly
  2. 2.CTG Italcementi GroupBergamoItaly

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