Segregation of cement grouts during their rheological measurements

Author(s): PHAM Ba Tung, GALLIAS Jean-Louis, PIERRE Alexandre, KACI Abdelhak
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: 38 - 42
Total Pages: 5
Language: English

Abstract: Rheological properties of cement-based materials are difficult to characterize due to many pitfalls: heterogeneities of materials, slippage, etc. This study focuses on the influence of the segregation under shearing of cement grouts on rheological behaviors by exploiting the flow curves using a rotational rheometer equipped with coaxial-cylinders. In parallel, the density measurements of the sample in the upper part of the sheared volume before and after the tests are carried out to study the sedimentation. A criterion which characterizes the potential of grouts segregation is also introduced. We then highlight that the sedimentation under shearing is accentuated by the lower air gap used.

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