A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
A Theoretical Frame to Study Stability of Fresh Concrete
Abstract A theoretical frame able to describe the segregation under gravity of a mono-sized granular material in a yield stress suspending fluid is presented. Two stability criteria are proposed. The first one deals with the stability of a single sphere in a yield stress fluid while the second one takes into account the mechanical interactions between the particles that could lower the risk of instability. The two criteria are then experimentally validated in the case of polystyrene spheres in a cement paste. Image analysis techniques are used to measure the final solid fraction in the segregated zone. The comparison of the experimental and theoretical results is followed by an analysis of the possible use of such criteria in a mix proportioning method and a short discussion of the influence of the change of rheological properties with time on the segregation phenomenon.
A Theoretical Frame to Study Stability of Fresh Concrete
Abstract A theoretical frame able to describe the segregation under gravity of a mono-sized granular material in a yield stress suspending fluid is presented. Two stability criteria are proposed. The first one deals with the stability of a single sphere in a yield stress fluid while the second one takes into account the mechanical interactions between the particles that could lower the risk of instability. The two criteria are then experimentally validated in the case of polystyrene spheres in a cement paste. Image analysis techniques are used to measure the final solid fraction in the segregated zone. The comparison of the experimental and theoretical results is followed by an analysis of the possible use of such criteria in a mix proportioning method and a short discussion of the influence of the change of rheological properties with time on the segregation phenomenon.
A Theoretical Frame to Study Stability of Fresh Concrete
Roussel, N. (author)
2006
Article (Journal)
English
A Theoretical Frame to Study Stability of Fresh Concrete
| Springer Verlag | 2007
A Theoretical Frame to Study Stability of Fresh Concrete
| Springer Verlag | 2006
A Theoretical Frame to Study Stability of Fresh Concrete
| Online Contents | 2006
A Theoretical Frame to Study Stability of Fresh Concrete
| Online Contents | 2006
A theoretical frame to study stability of fresh concrete
| British Library Online Contents | 2006