Document Type : Original Article
Authors
1
Concrete Structures Faculty of Engineering – Zagazig Universit, zagazig , sharqia
2
Lecturer Structural Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt
3
Constructions,faculty of engineering,zagazig university, zagazig, sharqia
Abstract
Self-compacting concrete (SCC) is a leading concrete type with a super-plasticiser and a stabiliser which remarkably ease and increase the flow rate to flow through complex geometrical configurations under its self-weight. All fresh concrete mixtures groups are tested for slump test and L-Box test. While hardened concrete cubes, cylinders, and prism specimens are tested for compression, tension, and flexure respectively.
The main objective of this study is to evaluate the mechanical properties and behaviour of SCC under different conditions of binder content, VMA ratios, and SA or FA ratios. The main parameters include, the binder content, fly-ash content, silica fume content and the VMA addition ratios. To achieve this goal an experimental study is performed. 18 concrete mixes are prepared with various binder contents of 350,400, and 450 kg/m3, VMA addition ratios of 1, 1.5, and 2% and 15% replacement of silica fume and fly ash. The mechanical properties were plot versus the VMA ratios at binder contents of 350, 400, 450 kg/ m3, at specific ratios of VMA (1%, 1.5%, 2%) for 15% of SF and FA separately. Results exhibit that the mechanical properties improved by increasing the binder content and decreasing the addition ratio. Optimum cases for compressive strength at binder contents of 450 kg/ m3, VMA of 1%, and SF of 15%, and tensile strength at binder contents of 450 kg/ m3, VMA of 2%, and SF of 15%, and flexure strength at binder contents of 450 kg/ m3, VMA of 1%, and SF of 15%.
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