Chloride penetration in self compacting concrete

Title: Chloride penetration in self compacting concrete
Author(s): K. Audenaert, G. De Schutter
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: 818 - 825
Total Pages: 8
Nb references: 11
Language: English

Abstract: The two essential properties of SCC, a high flowability and a high segregation resistance, are obtained by a large amount of fine particles and the use of superplasticizers. This is resulting in a slightly altered pore structure of SCC in comparison with the pore structure of traditional concrete. Many research programmes have already been carried out concerning the fresh properties of SCC, but only few results have been obtained yet concerning the durability of SCC. This project includes laboratory studies of chloride penetration on 6 SCC and 1 traditional concrete. Two types of test were performed. The first test is a non steady state migration test using an electrical field and is developed by Tang et al. and described in NT BUILD 492. This test is carried out on the specimens at the age of 28, 56 and 90 days. The second test is performed on cylindrical specimens with a diameter of 230mm and a height of 70mm. These specimens are alternately immersed in a solution containing chlorides and exposed to air. One cycle takes approximately 1 hour. After 6, 12, 18 and 24 weeks the specimens are broken and the penetration depth is determined. For the self compacting concrete, a constant amount of cementitious materials (cement and filler), even as a constant amount of water, sand and gravel was considered. Two types of cement are used (portland cement and blast furnace slag cement), three types of filler (fly ash and two types of limestone filler with a different grading curve) and the influence of the cement / powder ratio is studied. The results are discussed in relation with the pore structure of SCC.

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