126. Low fines content Self-Compacting Concrete

Title: 126. Low fines content Self-Compacting Concrete
Author(s): M. Corradi, R. Khurana, R. Magarotto
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 839 - 844
Total Pages: 6
Nb references: 3
Language: English

Abstract: Self Compacting Concrete was introduced to the European Market in the mid ’90s’ gaining acceptance rapidly especially in the precast industry where its advantages are easily verified and put to a profitable use. But the picture is quite different in the ready mixed concrete industry where less than 1% of the concrete produced is self compacting. Why this big difference?
Generally, when the ready mixed concrete producer has to supply a self compacting concrete it has a much higher strengths than that ordered and paid for. This is due the high fines content necessary for the particular properties of SCC. These fines are usually provided by cement and pozzolanic materials that are readily available at the plant. The excess cement content and the extra amount of fines required for the SCC and the logistics involved add to the production costs and the margins. The reduction of the total fines content would lead to a decrease in the unit cost of the concrete, as long as the self compaction is maintained.
This paper presents mixture proportioning of low fines content self-compacting concrete with a total "fines" content of about 350 kg/m3, to be used in the ready mixed concrete industry to produce their daily 25 to 35 MPa strength concrete in a more cost effective manner using the state of the art superplasticisers and innovative viscosity modifying admixtures.

Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00