An Experimental Investigation on Elastic Properties of Triple Blended Fibrous Self Compacting Concrete

Abstract

Self-compacting concrete (SCC) was developed in the context of skilled labour shortage in Japan. The concrete flows into moulds and forms on its own and consolidates without need for compaction .It commonly calls for a remarkable plasticizer to ensure fluidity and float for a sufficient length of time with out experiencing a huge slump loss. Viscosity enhancing sellers are also delivered to make certain a solid and fully cohesive mixture even after subjecting to vagaries at production websites like various moisture contents of aggregates, unintentional addition of excess water, ambient temperature, humidity versions and other elements.

 SCC is generally defined as the “concrete that doesn't want compaction”. It way SCC gets compacted without outside efforts like vibration, floating, or poking. The mix therefore is needed to have the ability of flowing, filling voids and being strong. Due to these characteristics, SCC is ideally suited for concrete structures, that have closely congested reinforcement or hard get entry to situations.

The use of SCC in real creation is still in its infancy in India. Lack of awareness of generation, understand how, technical facts and experience will be noted as the main motives. For the adoption of any new material or generation, it typically desires tested overall performance document over traditional materials. Considerable research is carried out in India, in the direction of the era development in order that SCC should soon locate an area inside the Indian creation enterprise.

In the present project work, fibrous self compacting concrete is being produced by using steel fibres.  The percentage of steel fibres is kept low between 0.1 to 0.4% of the volume of concrete.  Aspect ratios (l/d ratio) are varied from 10,15,20&25.  The percentages as well as aspect ratios of steel fibres are kept low so as not to interfere with the flow of SCC.  A basic concrete mix of M40 is selected.  Workability studies using L-box, U-box, V-funnel and slump are being conducted on various SCC mixes to satisfy EFFNARC guidelines.

Standard cube and cylinder specimens will be cast for various fibrous self compacting concrete mixes after satisfying the workability requirements.  Tests will be conducted at the age of 28 days for compressive strength and elastic properties.  Elastic properties include Young’s modulus and Poisson’s ratio.  The variation of compressive strength for various fibre percentages and aspect ratios will be studied.  Improvement in the elastic properties with the addition of fibres will be studied.  They are correlated with the compressive strength.

Based on the experimental results obtained in the present project work conclusions will be drawn on the improvement of strength properties of SCC by employing fibres.