Effects of Relative Density on Shear Strength Characteristics of Sand-Tire Chips Mixture

 

Edy Tonnizam Mohamad

Associate Professor (Dr.) Department of Geotechnics and Transportation, Faculty of Civil Engineering, Universiti Technologi Malaysia (UTM)
e-mail: edy@utm.com

Nima Latifi*

Ph.D. Candidate, Department of Geotechnics and Transportation, Faculty of Civil Engineering,Universiti Technologi Malaysia (UTM)
* Corresponding Author; email: En_latifi@yahoo.com

Aminaton Marto

Professor, Department of Geotechnics and Transportation, Faculty of Civil Engineering,Universiti Technologi Malaysia (UTM)

Razieh Moradi

Ph.D. Student, Department of Geotechnics and Transportation, Faculty of Civil Engineering,Universiti Technologi Malaysia (UTM)
email: mrazieh2@live.utm.my

Seyed Vahid Alavi Nezhad Khalil Abad

Ph.D. Candidate, Department of Geotechnics and Transportation, Faculty of Civil Engineering,Universiti Technologi Malaysia (UTM)
email: v_alavi_59@yahoo.com

 

 ABSTRACT

Disposal scrap tires are environmental dilemma. However, they can improve the characteristics of soil which is an essential material of construction. These problems may be somehow reduced by finding applications for them in engineering, for example, as lightweight materials for backfill in geotechnical projects. This research studied the shear characteristics of sand after adding pieces of tire chips in different relative densities (35% and 75%), by doing direct shear experimental tests. Waste tire grains were prepared with special popular machinery in a local area. Sand and tire chips were mixed with different weight percentages such as 10%, 20%, 30%, 40%, and 50% by weight. Three normal stresses (28.9, 56.2, and 110.7 kPa) were considered for all the experiments. The rubber grains were distributed in the sand such that uniform mixtures are obtained. The internal friction angle and the effects of different parameters in the experiments were analyzed and discussed. The results showed that the influencing parameters on shear strength characteristics of sand-rubber mixtures are normal stress, mixture unit weight, and rubber content, also it showed that adding tire chips up to 10%, can improve the shear characteristics of soil. From environmental point of view and due to lightweight material for the sand-waste hose particles, it may be useful to use such materials in corresponding geotechnical projects.

Keywords: shear properties, tire chips, sand, friction angle, environment, geotechnical engineering.

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