Flexural Behaviour of High Performance Reinforced Concrete Beams Using Industrial Byproducts

摘要

In this study experim ental investigations were carried out to explore the possibility of u sing Fly Ash, silica fume and metakaol in as a replacemen t of cement and bottom ash as a replacemen t of sand to make high performance concrete mixtures. The m ain objective of this stud y is to evaluate the flexural streng th of high performa nce concrete beams by utilizing fly ash , silica fume, m etakaolin and bottom ash. A total of eight rectangular beams were cast and tested. The bea ms were 125 mm . 250 mm in cross-section and 3200 mm long. The beams were tested in two point loading o ver a simply supported span of 3000 mm. Of the above eight beams, 2 beams served as control specimen, 6 beams were cast with three different combinations of replacement of cement and fine aggregate. All the beams were evaluated in terms of load, deflection, moment, curvature and ductility. The test results indicated that beam with cemen t replacement by 10 % silicafume and 10% metakaolin and fine aggregate replacement by 20% bottom ash exhibit 60% increase in load carrying capacity when compared to that of con trol beam.