Strength and deformation characteristics of shredded rubber tire – sand mixtures

Abstract

The volume of scrap tires, an undesired urban waste, is increasing every year. One of the possible alternatives for this waste is to use shredded tires alone or mixed with soil as a lightweight backfill. This paper presents the results of triaxial tests on compacted shredded rubber tire – sand mixtures. The tests were carried out with different mixing ratios of shredded rubber tires and sand. With an increasing proportion of sand in the mixture, the density, unit weight, and shear strength of the mixture increased, but the compressibility decreased. The dilatancy characteristics of shredded rubber tires mixed sand were relatively similar to a cohesionless material and can be explained within a critical state framework. A proposed constitutive model broadly captures the strength and deformation characteristics of a shredded rubber tire – sand mixture at different mixing ratios.Key words: shredded rubber tires, triaxial testing, constitutive model.

Experimental study on behavior of soil-waste tire mixtures

“…Some ranges of D r =D s have been reported in previous pieces of research such as D r =D s 0:25 [14], D r =D s 0:8 1:1 [15,16], D r =D s 4 [17], D r =D s 5 [18], D r =D s 10 [19,20], D r =D s 20 [7,10,21], D r =D s 100 [6], D r =D s >> 100 [4,8,9].…”

“…Yang et al [21] investigated the shear strength of soil-rubber mixtures using direct shear and triaxial apparatus. Bergado et al [22], Zornberg et al [4], and Youwai and Bergado [20] also examined strength characteristics of mixtures of di erent shape and size and di erent tire contents by triaxial apparatus and concluded that maximum shear strength is obtained in the mixture having about 35% rubber by weight. Gotteland et al [23] also reported 34% rubber as the optimum value at the con ning pressures under 100 kPa.…”

Recycled Tire Chips Mixed with Sand as Lightweight Backfill Material in Retaining Wall Applications: An Experimental Investigation

“…Various researchers have carried out investigations on the usage of scrap tire derived materials in civil engineering applications like recycled tire chips as a fill material in road/ embankment construction [6][7][8], lightweight fill material in retaining wall backfill under static loading conditions [2][3][4][5], and waste tire shreds as a leachate collection layer [9,10]. Several researchers [11][12][13][14][15][16][17][18][19][20][21][22] have evaluated the engineering properties of the scrap tire chips and sand tire chip mixtures by conducting permeability, compressibility, large direct shear tests, and triaxial tests on the samples. The permeability and shear strength of the sand tire chip mixtures are higher than that of sand alone [18] and the unit weight of the tire chips is less than one third of that of sand [3] making them fit for light weight fill material.…”

Use of rubberised backfills for improving the seismic response of integral abutment bridges

“…The use of 36 rubber-soil mixtures was found to be a beneficial solution for foundations, embankments, backfilling in 37 retaining walls and other geotechnical works as per Hall (1991), Edeskar (2006), Karmokar (2007), 38 Ravichandran and Huggins (2014). In particular, tyre derived aggregates have been found to have high shear 39 resistance, low shear modulus (Humphrey and Manion, 1992;Youwai and Bergado, 2003), controllable 40 stress-strain behaviour and increased damping. These unique properties are ideal in geotechnical design, 41…”