eFlow – A Pocket Concrete Rheometer

Author(s): Toussaint Fabrice
Paper category: Proceedings
Book title: International RILEM Workshop on Rheological Measurements of Cement-based Materials IRWRMC’18
Editor(s): Chafika DJELAL, Yannick VANHOVE
Print-ISBN: 978-2-35158-230-5
e-ISBN: 978-2-35158-231-2
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 64 - 68
Total Pages: 5
Language: English

Abstract: A micro concrete rheometer was developed. It is dedicated to Self-Compacting Concrete. It consists in a smartphone application named “eFlow”. It records the evolution of the concrete diameter during the Slump Flow test. The smartphone performs the video and an image analysis in order to capture the average spread velocity. It also calculates the yield stress and the viscosity at different shear rates, by using the data set. The plastic viscosity is easy to calculate in case of Bingham approximation. A calibration of the yield stress and the shear rate was carried out. Some improvements of this calibration are going on with the help of numerical simulations.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00