Producing high Strength Concrete Using Recycle Coarse Aggregate with Glass Fibre

Abstract

Abstract
Suitability of glass fibers for use in structural recycled aggregate concrete of high strength is of high demand. The raw materials are obtained from the demolition activity of building roads, bridges & fly over, sub way, remoulding cylinder and block. Dumping of demolished waste has created an acute problem. In India, construction industry itself generates about 10–20 million tons of demolished waste annually whereas no such technology is so far available for its reuse. Use of structurally recycled aggregate concrete from demolished waste has been used with glass fibre to produce a high strength concrete. The fresh and hardened state properties of partially replaced recycled aggregate concrete, with varying percentage of glass fibres, are compared with the corresponding conventional aggregate concrete. The investigation was carried out using workability test, compressive test, split tensile test & water absorption test. The compressive and flexural strength of M20 grade concrete with 0% RCA and 50% RCA have increased as the fibre content increases. The maximum values of all these strength were obtained at 0.03% of fibre content for both the concrete of 0% RCA and 50% RCA. The workability of concrete considerably reduces as the amount of recycled aggregate increases. As far as the strength is concerned the result shows a gradual increase in the compressive strength up to 20% of recycled aggregate and tends to a maximum of 60% in recycled coarse aggregate. Large deflections of beams before failure indicates improved ductility with the addition of fibers.

Keywords: high Strength concrete, AR glass fibre, HSGFRC, RCA, FRC