Effect of superplasticizer dosage on the rheological characteristics of self-compacting concretes

Authors

  • Omar TALEB Laboratory EOLE, University of Tlemcen, Algeria
  • Fouad GHOMARI Laboratory EOLE, University of Tlemcen, Algeria
  • Mohamed Amine BOUKLI HACENE Laboratory EOLE, University of Tlemcen, Algeria
  • El-Hadj KADRI L2MGC Laboratory, University of Cergy Pontoise, France
  • Hamza SOUALHI L2MGC Laboratory, University of Cergy Pontoise, France

Keywords:

Self compacting concrete, Rheology, Superplasticizer, Viscosity, Yield stress

Abstract

The use of superplasticizers in self-consolidating concretes (SCC) is essential to ensure the desired fluidity. Through this experimental work, we aim to study the effect of the superplasticizer dosage on the characteristics of SCC. The rheological properties of the mixtures are studied by means of a high torque rheometer with couette geometry. In addition, tests of EN NF 206 / CN standard were achieved to make a comparison with rheometer tests. The results showed that superplasticizers improve the workability of SCC by significantly decreasing the static and dynamic shear thresholds. However, their effect on the plastic viscosity depends strongly on the dosage used. Moreover, the increase in the superplasticizer dosage is always accompanied by a decrease in the stability of the mixture, which can lead to losses in mechanical strength.

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Vol_10_Issue_01_January_2018

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Published

01/19/2023

How to Cite

TALEB, O., GHOMARI, F., BOUKLI HACENE, M. A., KADRI, E.-H., & SOUALHI, H. (2023). Effect of superplasticizer dosage on the rheological characteristics of self-compacting concretes. Revue Nature Et Technologie, 10(01), 17–26. Retrieved from https://journals.univ-chlef.dz/index.php/natec/article/view/122

Issue

Vol. 10 No. 01 (2018)

Section

Fundamental & Engineering Sciences

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