Effect of material constituents on fresh and mechanical properties of SCC designated for precast, prestressed applications

Title: Effect of material constituents on fresh and mechanical properties of SCC designated for precast, prestressed applications
Author(s): Wujian Long, Kamal Henri Khayat, Feng Xing
Paper category : conference
Book title: 2nd International Symposium on Service Life Design for Infrastructures
Editor(s): K. van Breugel, Guang Ye, Yong Yuan
Print-ISBN: 978-2-35158-096-7
e-ISBN: 978-2-35158-097-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 757 - 764
Total Pages: 8
Nb references: 10
Language: English

Abstract: The successful design of self-compacting concrete (SCC) implies that some factors require greater attention than those of conventional concrete, including the type and size of coarse aggregate, composition and content of binder, and water-to-cementitious materials ratio (w/cm). A parametric study was undertaken to evaluate the influence of these factors on key workability characteristics and compressive strength development of SCC designated for the construction of precast, prestressed applications. In total, 33 SCC mixtures were investigated.
The first 24 non air-entrained SCC mixtures were prepared using either crushed aggregate or gravel with three different nominal sizes, two levels of w/cm, and three binder compositions.
Three air-entrained SCC mixtures with low w/cm were also investigated. In addition, three mixtures having relatively low slump flow values of 600 to 640 mm and three other mixtures presenting high slump flow of 710 to 760 mm were prepared to evaluate the effect of fluidity level on workability and compressive strength development. Based on the test results, guidelines for proportioning SCC for precast, prestressed applications are suggested. This includes recommendations regarding the effect of w/cm, binder type, maximum-size of aggregate (MSA) and type of coarse aggregate on workability characteristics and compressive strength development.

Online publication: 2011-04-20
Publication type : full_text
Public price (Euros): 0.00