RESIDUAL COMPRESSIVE STRENGTH OF FLY ASH BASED GLASS FIBRE REINFORCED HIGH PERFORMANCE CONCRETE SUBJECTED TO ACID ATTACK
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ABSTRACT:
In recent years, improvements in concrete properties have been achieved by the invention of High-Performance-Concrete (HPC). Improvements involving a combination of improved compaction, improved paste characteristics and aggregate-matrix bond, and reduced porosity are achieved through HPC. The ductility of HPC can be improved by altering its composition through the addition of glass fibers in the design mix. High- Performance-Concrete made with glass fibers inside is regarded as Glass Fiber Reinforced High Performance Concrete (GFRHPC). This paper presents the details of an experimental investigation planned to utilize fly ash in the production of Glass fibre reinforced High-Performance-Concrete (GFRHPC). The investigation examines the progressive deterioration of concrete mixtures containing various combinations of fly ash based GFRHPC
mixes exposed to sulphate and chloride solutions. Acid attack tests have been conducted to measure the
durability of GFRHPC. Cubes of 150X150X150 mm have been cast, cured and then kept immersed in 5% concentrated solutions of HCl, H2SO4 and MgSO4 for 30, 60 and 90 days and then tested to record the residual compressive strengths of GFRHPC produced with the fly ash mineral admixtures. The results have been analyzed and useful conclusions have been drawn.
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