RECENT DEVELOPMENTS IN EVALUATING PUMPING BEHAVIOR OF FLOWABLE AND SELF-CONSOLIDATING CONCRETE

Author(s): Dimitri Feys and Kamal H. Khayat
Paper category: Proceeding
Book title: Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Caijun Shi, Zhihua Ou and Kamal Henri Khayat
Print-ISBN: 978-2-35158-143-8
e-ISBN: 978-2-35158-144-5
Publisher: RILEM Publications SARL
Publication year: 2014
Pages: 3
Total Pages : 1
Language : English

Abstract: In this paper, recent developments in evaluating pumping behavior of flowable and self-consolidating concrete (SCC) are discussed. First, a brief overview of the underlying physics of pumping of concrete is given to introduce the reader to the concepts of friction, flow, hydrodynamic and hydrostatic pressure and to include the concept of the lubrication layer. Different techniques to assess the lubrication layer properties are then discussed, including tribology and different visualization techniques for the velocity profile. Using tribology, or by combining the rheological properties of the concrete and its constituent mortar and knowing the thickness of the lubrication layer, it is shown that pressure losses during pumping of concrete can be successfully predicted. In the final section, an overview is given of the influence of different mix design parameters of high-strength SCC on pressure loss, as well as concrete viscosity and tribological properties.

Online publication: 2017
Publication type: full_text
Public price (Euros): 0.00