Paper Details

In the past many decades, the production of scrap tires increased in world. These tire are non-biodegradablein nature. In Pakistan a huge amount of tires are used for burning which caused environmental pollution and manyhealth related issues. To overcome this issue, the scrap tire are used in many civil engineering projects as additives orreplacements of geo-synthetic materials to reduce the hazardous effects. The scrap tires are used in many constructionprojects, i-e, in mechanically stabilized earth retaining wall, bridge embankments and as a fill material in other retainingstructures. To calculate the pull-out resistance and friction angles for mechanically stabilized earth retaining wall, anumbers of laboratory pull-out and large scale direct shear tests were performed. In this research pull-out tests areconducting using different dia of deformed steel bars that are embedded in tire-shred sand mixture of different tire sizesand ratio respectively. The effect of confining pressure and tire- shred size on the pull-out capacity of the reinforcementin tire shred–sand mixtures are evaluated. Mixtures of sand with tire-shred of sizes 50, 75 and100 mm are prepared.Modified proctor tests are performed on different tire shred-sand mixing ratios (0, 20, 30 & 40% by weight of sand).From these results, it is encountered that MDD, for different tire-shred size (50, 75 &100mm), was achieved at 20% tiresherds-sand mixture. Pull-out tests and LSDS tests are conducted under three different normal stresses 20kPa, 40kPaand 60kPa for different tire-shred sizes at MDD. From the test results, it is determined that the deformed steel barreinforcement offered higher pull-out resistance in tire sherds-sand mixtures than the pull-out resistance in sand alone.Subsequently internal shear resistance increased with the increase in the tire-shreds ratio. Moreover results also indicatethat the pullout resistance and shear strength increased with increase in tire shreds size and size of deformed steel due toincrease of contact area.

Qazi Khawar Gohar, Irshad Ahmad, “EVALUATION OF PULL OUT CAPACITY FOR DEFORMED STEEL BARS EMBEDDED IN TIRE SHRED-SAND MIXTURE USING DIRECT SHEAR APPARATUS”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 7, Issue 1, pp. 53-60, January 2020.