Abstract
The Herschel-Bulkley model is one of the most commonly used rheological models for Non-Newtonian fluids, and it has been applied to describe the non-linear rheological behavior of fresh concrete. However, because it is difficult to transform the measured rotating speed and torque data into fundamental rheological units for coaxial cylinder rheometers, only an approximate approach has been proposed for this model. In order to improve the accuracy of the solution, a new integral equation describing the torque-rotation speed of Herschel-Bulkley model was derived in this paper, and 40 sets of simulated data were used for the comparison between the two methods. The equation introduced in this study was further validated by the experimental data of SCC. The results indicated that the established solution yielded more accurate results than the approximate one. © 2019 Elsevier Ltd. All rights reserved.
| Original language | English |
|---|---|
| Article number | 117530 |
| Journal | Construction and Building Materials |
| Volume | 237 |
| Online published | 22 Nov 2019 |
| DOIs | |
| Publication status | Published - 20 Mar 2020 |
| Externally published | Yes |
Funding
Financial support from the National Key R&D Program of China ( 2017YFB0310100 ), and the National Natural Science Foundation , China ( U1504513 and 51778629 ) are gratefully acknowledged. The authors would like to thank Xiamen Institute of Technology for the use of their ICAR rheometer and Professor HE Fuqiang and Mr. WANG Ruipan for their advice and kind help. A great appreciation is offered to Professors Kamal Khayat and Wujian Long for offering valuable test data for model validation.
Research Keywords
- Coaxial cylinders rheometer
- Herschel-Bulkley model
- Rheology
- Yield stress