Investigation of Mechanical Properties of Granulated Waste Rubber Aggregates Substituted Self-Compacting Concrete Mortar Produced with Different Cement

Abstract

Storage or disposal of waste vehicle tires is difficult, costly and time consuming. Waste tires, which cause the release of pollutant gases to the environment due to its chemical structure in the process of destruction, are considered as an important recycling material in the context of developing and advancing technology and alternative products. Waste vehicle tires are granulated in certain sizes after the disintegration phase and reused in many different fields. With this experimental study, it is aimed to examine the fresh and hardened properties of 12 different self- setting mortar (SSM) samples of Ground Vehicle Tire Aggregates (GVTA), which are substituted with 5 different fine aggregates and prepared with two different cement types. The evaluation of the workability properties of fresh SLM samples prepared in accordance with EFNARC was done with mini spreading and mini V-hopper experiments. In order to determine the mechanical properties of the hardened SSM, pressure and three-point bending tests were performed on the 3rd, 7th and 28th days of prismatic samples in 40x40x160mm dimensions, and capillary water absorption test is carried out on cubic samples in 50x50x50 mm dimesions on the 28th day. The optimum usability rate of GVTA in SSM mixtures produced separately with CEM-V 42.5R and CEM-V 32.5R cement is interpreted through graphs and tables. With this study, it was observed that when the rate of GVTA was increased in the SSM mixture, the capillary water absorption amount increased, while the pressure and bending strengths decreased