Effect of poly car boxy late admixtures on portland cement paste setting and rheological behaviour

F. Puertas; M. M. Alonso; T. Vazquez

doi:10.3989/mc.2005.v55.i277.180

Effect of poly car boxy late admixtures on portland cement paste setting and rheological behaviour

Authors

F. Puertas Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC). Madrid
M. M. Alonso Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC). Madrid
T. Vazquez Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC). Madrid

DOI:

https://doi.org/10.3989/mc.2005.v55.i277.180

Keywords:

cements, policarboxilate admixtures, superplasticizers, setting times, rheological properties

Abstract

The objective of the work was to determine the effects of polycarboxilated-type admixture on the setting times and the rheological properties of different types of cements including CEM I 42.5 R, CEM Il/B-V 42.5 N and CEM III/B 32.5 N, defined according to the UNE EN 197-1:2000 standard. The results show that there is a lineal relationship between the initial setting times and the admixture dosage. Mathematical equations that model this behaviour for each of the cements have been determined. The data obtained from the minislump test and from the rheological parameters determined using the rheometer (plastic viscosity and yield stress) point to similar conclusions. It was also verified that the workability effect of the polycarboxilate admixture is most intense for blended cements.

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Published

2005-03-30

How to Cite

Puertas, F., Alonso, M. M., & Vazquez, T. (2005). Effect of poly car boxy late admixtures on portland cement paste setting and rheological behaviour. Materiales De Construcción, 55(277), 61–73. https://doi.org/10.3989/mc.2005.v55.i277.180

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Issue

Vol. 55 No. 277 (2005)

Section

Research Articles

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