INVESTIGATION ON FRHPC WITH SILICA FUME AND FLYASH AS A PARTIAL REPLACEMENT FOR PORTLAND CEMENTDurai Sevatham, Punya Suresh and R. Venkatasubramani
The proper disposal of silica fume and fly ash, an industrial by product waste, is one of the major issues for environmentalists world wide since dumping of silica fume as a waste material may cause severe environmental problems and hazards. An experimental research program was carried out to study the utilization of silica fume and flyash and in concrete instead of dumping it as a waste material. The objective of the present experimentation is to study the effect of silica fume, fly ash and glass fibre as a partial replacement of cement in the strength and durability characteristic of concrete obtained. Concrete mix of M75 grade is designed which serves as the basic control mix. Silica fume, glass fibre and fly ash mix is obtained by adding silica varying from 0%, 5%, 7.5% and 10% and fly ash of 10% and glass fibre of 0.3% by weight of cement. A water cement ratio of 0.26 is maintained throughout the investigation. The main purpose of this research is to study the behavior of fibre reinforced high performance concrete with partial replacement of cement by silica fume and fly ash. Strength studies were conducted by means of compressive, tensile and flexural strength for 28 days respectively for M75 concrete. Durability against water absorption, permeability, impact and acidity were conducted and studied.
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