Investigation of the Relationship Between Rheological Properties of Self-consolidating Concrete Mixtures and the Setting Time of by Electrical Resistance Method

Document Type : Original Research

Authors
P. ghoddousi 1
A. A. Shirzadi Javid 2
B. bozorgmehr 3
1 associate professor, Iran university of science and technology
2 Assistant professor, Iran University of Science and Technology
3 Iran university of science and technology
Abstract
Several studies have been done on the rheological properties and setting time of cementitious mixes, but the relationship between these two important features has not been studied so far. Therefore, the aim of this study is to investigate the relationship between rheological properties and setting time in self-consolidating concrete mixtures. In this study, six self- consolidating concrete mixture proportions were considered, in which the effect of water-cement ratio changes, silica fume and slag was used. The electrical resistivity method has been used in determining its setting time, and the performance of this method has been evaluated in determining the rheological properties. Since the electrical resistivity method is not standardized in determining the setting time, therefore, to verify the results, the standard penetration resistance method is also used according to the ASTM-C403. In the study of rheological properties, the studies have been done in two sections of efficiency and rheometer analysis. From the results, it was found that mixtures that have higher slump flow have recorded less time to take. It was also found that concrete mixtures that have higher yield stress (static and dynamic) have shorter setting time. In this way, the relationships between these two important variables (rheological properties and setting time) were evaluated by the relationships.

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Modares Civil Engineering journal
Volume 18, Issue 6
November and December 2018
Pages 193-206