A simple and significant segregation test for SCC

Title: A simple and significant segregation test for SCC
Author(s): D. Lowke, K.-H. Wiegrink, P. Schiessl
Paper category : conference
Book title: International RILEM Symposium on Self-Compacting Concrete
Editor(s): O. Wallevik and I. Nielsson
Print-ISBN: 2-912143-42-X
e-ISBN: 2912143713
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 356 - 366
Total Pages: 11
Nb references: 8
Language: English

Abstract: Self-compacting concrete (SCC) is one of the most innovative building materials that has been developed in recent years. It is becoming more popular due to its advantages of workability and placing. Self-compacting concrete has to be very flowable for practical use, while ensuring a high stability without any significant segregation. However, the fresh concrete's mixture stability has proven to be its most sensitive property in many of the projects that are monitored by the Institute of Building Materials Science and Testing in Munich. Investigations concerning the mixture stability were conducted for this reason. The results indicate that the usual tests for SCC - such as slump flow test or V-funnel test - are not sensitive enough to reveal any separation features. A new, simple and significant segregation test has therefore been developed. The aim is to measure the segregation effect directly, instead of describing this effect by means of the fresh concrete's other parameters like viscosity for example. This new test determines the content of coarse aggregate (larger than 8 mm) in fresh concrete at different levels of a 450 mm high specimen, after a defined sedimentation time. This test has meanwhile been used in many cases in the laboratory as well as under practical conditions at ready-mix plants. This test is able to show the segregation very exactly and quantifiably with a direct measurand.

Online publication: 2003-08-21
Publication type : abstract_only
Public price (Euros): 0.00