122. Salt frost resistance of self-compacting concrete

Title: 122. Salt frost resistance of self-compacting concrete
Author(s): B. Persson
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: 811 - 816
Total Pages: 6
Nb references: 7
Language: English

Abstract: In this article salt-frost resistance of Self-Compacting Concrete in several projects are outlined. For this purpose first of all a summing up of international research is presented.
Then results of experiments including both laboratory and field tests are analysed. The parameters water-cement ratio, additives, admixtures, cement types, fibres and in-situ effects are studied. The results indicate that salt frost scaling of Self-Compacting Concrete does not differ much from the analogous property of normal concrete provided that the tested sample are laboratory produced. However, air entrainment in Self-Compacting Concrete as well as viscosity agent and polypropylene fibres may affect the salt frost scaling in another way than in normal concrete. The superplasticiser polycarboxylic ether itself produces air entrainment which makes the dosage of air entrainment agent difficult to establish in an accurate way.
Both viscosity agent and polypropylene fibres in Self-Compacting Concrete seems to reduce the salt frost scaling durability substantially. For Self-Compacting Concrete produced in practise segregation of aggregate are essential factors to take into account since these are much more dictating for salt frost scaling of Self-Compacting Concrete than for normal.
Segregation of aggregate in Self-Compacting Concrete affects the water-cement ratio which leads to a substantial decrease of salt frost scaling durability of Self-Compacting Concrete.

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