In recent decades, many methods and new construction materials have been utilized to ameliorate the mechanical properties of concrete, one of which is slurry infiltrated fibrous concrete (sifcon). Sifcon built-updiverge from a conventional steel fiber reinforced concrete (SFRC) in two respects: it contains a volume fraction of fibers (usually 5 to 20 volume percent), and it uses a matrix consisting of very fine particles (absence of coarse aggregates). The experimental work had been implemented for studying two aspects. The first aspect was the study of mechanical properties of Sifcon with variation of steel fiber ratio (6%, 7.5%, and 9%) and the second aspect with variation of silica fume (100,150 and 200)kg/m3 by using (165 specimens) .165 samples were tested as follows: - 66 cubes, 33cylinders, 33pirsms and 33double L shape for the purposes of deterring of compressive, tensile, flexural and shear strength respectively. The study included the use of two types of steel fiber with two aspect ratios with different lengths (6mm and 3.5 mm), where 6mm was appropriate to penetrate the fiber network. It was found that the concrete mix which contains a percentage of steel fiber by 9% with silica fume 200 kg/m3 gave the best results. Also, it had been shown that the use of steel fiber ratio above 10% is not possible or very difficult during casting Sifcon specimens.
Volume 11 | 01-Special Issue
Pages: 1863-1872