Structural behaviour of deep beam using SCC with chopped strands and polypropylene fibre

摘要

An Experimental investigation was carried out to study the structural behaviour of deep beams using self-compacting concrete (SCC) with glass chopped strands (CS) in 0.06% and polypropylene fibre (PP) in different level of dosage. The SCC mix design was performed for 30 Mpa of Characteristics strength as per Nan-Su method. The SCC Mixes were prepared with Class F fly ash partially replacing cement by 40%. In addition with 0.06% of CS + SCC (CSSCC) in Combination with varying dosage of polypropylene fibre (CS+PP+ SCC), 0.1 (CSPSCC1), 0.2(CSPSCC2) and 0.3% (CSPSCC3) of volume of concrete were prepared. The effect of addition of hybrid fibre on the workability of SCC, CSSCC, CSPSCC1, CSPSCC2 and CSPSCC3 were studied. For the above mentioned mixes the Auxiliary specimens like cubes, cylinders and Prisms were casted and tested for Compression, Splitting Tension and Flexural strength respectively. A set of two Deep beams of size (1000x500x100 mm) were casted for each category of SCC mixes. The deep beams has been investigated for a structural behaviours like load deflection, web strains, energy absorption, toughness and crack width. From the study it has been inferred that addition of hybrid fibres to SCC mixes render beneficial both economical and Technical.