121. The influence of surface void characteristics on the durability and appearance of self-compacting concrete

Title: 121. The influence of surface void characteristics on the durability and appearance of self-compacting concrete
Author(s): K. Ichimiya, T. Yamasaki, C. Hashimoto
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: 805 - 810
Total Pages: 6
Nb references: 3
Language: English

Abstract: The surface void of self-compacting concrete (SCC) has a tendency to be generated easily due to its high viscosity and non-compaction. In this research, the influence of surface void characteristics on the durability and appearance of SCC was considered experimentally. The examined items are shown below.
(1) The relation between the amount of surface void (including invisible surface void) and the properties of concrete: freeze-thaw resistance, carbonation and appearance, was examined by four types of specimens (including those from ordinary concrete) which adjusted the mold release agent and the compaction method.
(2) In order to consider the applicability of the simple freezing and thawing test by using nitrogen liquid, which was proposed by Hashimoto’s research[1]. In order to compare this test, freezing and thawing test of JIS was also preformed due to ASTM C 666(JIS A 6204).
(3) A model specimen with artificial pits on the concrete surface was made. The size of the pits had been changed as follows: the diameters were change in order 0,5,10 mm; the depths were 0,5,10 mm and the percentage of total surface void area was 0,5,10 %, and the influence of pit conditions on water permeability was measured.

Online publication: 2009-06-16
Publication type : full_text
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