Feasibility Study of Retaining Walls Backfilled with Sand-Tire Chip Mixtures
Proper management of waste tires is a major problem in many regions of the world. Scrapped tires in different forms are being used in various civil engineering applications. This paper presents the feasibility study on the use of recycled tire chips mixed
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Feasibility Study of Retaining Walls Backfilled with Sand-Tire Chip Mixtures S. Bali Reddy, A. Murali Krishna, and Arun Ch. Borsaikia
Abstract Proper management of waste tires is a major problem in many regions of the world. Scrapped tires in different forms are being used in various civil engineering applications. This paper presents the feasibility study on the use of recycled tire chips mixed with sand as lightweight backfill material for retaining wall applications. Properties of sand and sand-tire chip (STC) mixtures and model tests conducted on retaining wall models with these materials are briefly summarized. Investigations on use of different STC mixtures (different proportions) indicated that STC30 mixture (30% of tire chips by weight) is most efficient in improving wall behavior in terms of displacements and pressures. To evaluate the financial benefits in the construction of cantilever retaining wall for three different sizes (3, 6, and 9 m height) with STC0 (sand alone) and STC30 mixture as the backfill material, wall designs including the structural designs and cost analyses are presented. Based on the feasibility studies, it is indicated that STC30 mixtures have lower bending moment and shear force on stem, heel, and toe. Thus, the STC30 shows the better sustainable backfill material for retaining wall structures providing a financial benefit of about 30%. Keywords Feasibility study • Sand-tire chip mixtures • Retaining walls • Lateral earth pressure • Cost saving
25.1 Introduction Scrap tires are the undesired urban waste and are increasing every year. In the future, the volume of waste tires is going to increase significantly in many developing countries. Recycling of waste is practiced nowadays to manage industrial wastes.
S. Bali Reddy (*) • A. Murali Krishna • A.C. Borsaikia Department of Civil Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India e-mail: [email protected]; [email protected]; [email protected] © Springer Nature Singapore Pte Ltd. 2017 G.L. Sivakumar Babu et al. (eds.), Geoenvironmental Practices and Sustainability, Developments in Geotechnical Engineering, DOI 10.1007/978-981-10-4077-1_25
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This happens to be very efficient approach in the management of scraped tires and path breaking in the sustainability of natural resources. Reuse of scrap tires in civil engineering applications is an essential step in creating a sustainable future. In some situations, the use of tire-derived materials may provide greater economy than those traditionally used materials. Bosscher et al. (1997) designed highway embankment using tire chips. In addition to other applications, shredded tires, with or without conventional granular material, have been used as retaining wall backfills in the past (Cecich et al. 1996; Humphrey et al. 1992; Tweedie et al. 1998; Hazarika and Yasuhara 2007). This paper presents the use of tire chips (scrap tire-derived material) in sand-tire chip (STC) mixtures as an alternative backfill ma
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