65. Affecting parameters on the surface settlement of self-compacting concrete

Title: 65. Affecting parameters on the surface settlement of self-compacting concrete
Author(s): S. Grünewald, J.C. Walraven
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: 437 - 442
Total Pages: 6
Nb references: 8
Language: English

Abstract: In the period between casting and setting, concrete is characterized by no or a relatively low stiffness. The settlement of self-compacting concrete (SCC) in the plastic stage can affect the durability. If concrete is cast in areas where the height of the cross-section varies, cracks might appear due to unequal settlement. SCC can also crack at surfaces that are not horizontal, which might affect the protecting function of the concrete cover. The settlement of concrete decreases the bond strength of reinforcing bars or strands and affects the aesthetic appearance of the surface. The surface settlement is an important aspect in cases where high geometrical accuracy of the elements is required, such as in foundation slabs for high speed railways.

A parameter-study was carried out in order to determine the affecting parameters on the surface settlement of SCC. The effect of the mixture composition is discussed; the initial and the final surface settlement of SCC can be influenced by the mix design.

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