Estimating of Torsional Capacity of Self Compacting concrete Beams

This paper expresses the effects of silica fume, super plasticizer and GFRP on the torsional strength of self-compacting concrete (SCC) beams. SCC and control concrete mix designs in this study are based on 20 different mixes with the water-cement ratios of 0.35 and 0.45. For Torsion tests, beams with the dimensions of 40 × 10 × 10 cm were casted. To determine the compressive strength and Pundit tests, Cubic specimens with the dimensions of 10 × 10 × 10 cm and standard cylindrical specimens with the dimensions of 15 × 30 cm height were made and cured for 28 days before testing. The obtained experimental results show that the effect of silica fume in w/c=0.45 was more than the other on torsional capacity was. The torsional strength of concrete beams with GFRP was increased about 43%. The error of estimating the compressive strength of concrete by pundit test was 2%. In addition, the existing equations for estimating the torsional strength of ordinary concrete can be used for Self Compacting concrete.