Mechanisms behind reduced form pressure when casting with SCC
2005 (English)In: RILEM Proceedings PRO 42 / [ed] Yu ZW; Shi C; Khayat KH; Xie YJ, 2005, Vol. 42, 589-598 p.Conference paper (Other academic)
Among the topics within the more than 10 year experience from use of self-compacting civil engineering concrete in Sweden there is the fact that the lateral form pressure can be lower than the design values for conventional concrete. This is in total contradiction to results from different parts of the world where pressures close to or equal to hydrostatic pressure have been reported. A project has been started and partly carried out in order to investigate on fresh SCC behaviour at rest. The hypothesis is that this extremely flowing concrete can build up a structure at rest withstanding the load of the concrete layers above with limited effect on the increasing lateral form pressure. A new methodology has been developed using rheometers for both SCC and its micro mortar phase. The mechanism behind the thixotropic behaviour is to be found in the latter phase where colloidal forces dominate. In the present stage of this project it has been established that SCC indeed develops a structure at rest. The magnitude of this structure is dependant on the concrete constituents.
Place, publisher, year, edition, pages
2005. Vol. 42, 589-598 p.
, RILEM PROCEEDINGS, 42
Construction & Building Technology; Engineering, Civil
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-14401DOI: 10.1617/2912143624.063ISI: 000243127200063OAI: oai:DiVA.org:kth-14401DiVA: diva2:332349
First International Symposium on Design, Performance and Use of Self-Consolidating Concrete, SCC’2005
QC 201008042010-08-042010-08-042012-02-13Bibliographically approved