Evaluation of the performance of Geo Scrap Tire reinforcement with horizontal transverse members by large-scale pullout test

Document Type : Research Article

Authors

1 Ph.D. Candidate,Department of Civil Engineering,University of Hormozgan, Iran

2 Department of Civil Engineering, University of Hormozgan, Bandar Abbas, Iran

3 CE Dept., Eng. Faculty, University of Hormozgan, Bandarabbas, Iran

4 Assistant Professor, Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran

Abstract

In this paper, the performance of the strip of scrap tires (Geo Scrap Tire(GST)) with horizontal transverse members evaluates as reinforcement elements in mechanically stabilized earth walls (MSEWs) by large scale pullout test (i.e. 1.4 m × 0.8 m × 0.8 m). In this regards, the experimental pullout results of GST reinforcement compared with theoretical equations and conventional reinforcement of Geosynthetic Strip (GS), Steel Strip (ST) and Steel Strip with Rib (STR). The experimental pullout results showed that the innovative suggested reinforcement element performed better than the other strips so that the GST strip was capable of increasing pullout resistance by more than 3, 2.5 and 1.5 times compared to the steel strip, the geosynthetic strip and the ribbed steel strip. The results show maximum pullout resistance of GST affected by the S/B ratio and with adding three horizontal transverse members can be increasing pullout resistance by more than 5.9, 4.9 and 3.2 times compared to ST, GS and STR. Thus, using GST reinforcement with three horizontal transverse member needs a smaller length (less than 30%) comparing to conventional strip reinforcement (ST, GS, STR). Therefore, using Geo Scrap Tire reinforcement can open a new horizon in solving the problem of scrap tires and assure geotechnical engineers in achieving superior and more economical systems of reinforced soil walls.

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