Fabrication Of Crumb Rubber Concrete 2D Frame Structure For Shake Table Test

Abstract

Reinforced cement concrete is prevailing construction materials for building of varieties of infrastructures
worldwide. The demands on reinforced concrete aggregates (fine aggregate, coarse aggregate) are increasing day by
day. Scrap tires are disposing and dumping in world in huge bulk. Accumulation of crumb rubber from tire scrap is
dangerous and threatening to environment. As rubber is non-biodegradable and resistant to most natural environmental
conditions, hence its direct disposal into environment or even burning in kiln creates lot of problems and environmental
contaminations. Therefore, alternatives are required to get counteracted with the excessive demands on these
ingredients. Researchers investigated experimentally crumb rubber concrete at different structural member levels i.e.
beam, column, cylinders etc. and found reduced mechanical strengths while some parameters were improved upon
testing. In current study two frames (plane frame) in 1/3rd
reduced scale models meeting simple similitude requirements
were constructed. One frame was of normal concrete and another one of crumb rubber concrete (incorporating 20%
crumb rubber). The mix ratio used in superstructure for both models were 1:1.75:1.82 with water/cement ratio of 0.52
and 1:1.60:3.40 with water/cement ratio of 0.49 for foundation pads construction. Total twelve standard concrete
cylinders were fabricated comprised three cylinders for each storey of normal concrete frame as well as of rubberized
aggregate concrete frame model. Crumb rubber powders were incorporated and replaced fine aggregate by volume with
20%. The maximum size of coarse aggregate used in current study was 8mm.