Experimental Study of the Effect of Worn-out Tire Fibers Addition on the Strength of R.C. Corners

Abstract

The growing problem of worn-out tires disposal in Iraq can be alleviated if new recycling routes can be found for the surplus tires. One of the largest potential routes is in construction, but usage of worn-out tires in civil engineering is currently very low. The current work aims to take advantage and get rid of car worn-out tires in the construction of reinforced concrete corners; such facility is cheap and environment friendly, with good thermal insulation and low density compared with the normal concrete .The worn-out tire fibers are added to the concrete mixture by replacing the weight of the coarse aggregate (gravel) with different ratios (5, 15, 25) percent, and for each replacing ratio , three different fiber lengths (2,4, and 6) cm are used and the width and thickness of each fiber is kept constant ( 1, 0.7 ) cm, respectively. Tensile reinforcement ratio adopted in the study for all specimens is (0.0081). Ten corner were specimens tested under static load tending to open the corner angle, nine of them with waste tire fibers and one without worn-out tire fibers .Length of the leg is (550) mm and cross section is (150×150)mm.