Physical and Chemical Properties of Recycled Tire Shreds for Use in Construction

Properties of Shredded Roof Membrane–Sand Mixture and Its Application as Retaining Wall Backfill under Static and Earthquake Loads

“…For each normal stress, two tests were conducted and the results were averaged to ensure the accuracy of the results. The unit weights of shredded rubber were found to be similar to that of shredded tires reported by Cecich et al [1] and Moo-Young et al [12]. It can be seen in Figure 3 that with the increase in percentage of shredded rubber in the mixture, the uncompacted and compacted unit weights sustainably decrease from 14.4 kN/m 3 and 16.2 kN/m 3 , respectively for the 100% sand mixture to 5.0 kN/m 3 and 6.2 kN/m 3 , respectively for the 100% rubber mixture.…”

“…The tests that were performed on the shredded rubber-sand mixtures are similar to the laboratory testing performed on shredded tires by Cecich et al [1], Moo-Young et al [12], and Warith et al [13]. These tests included sieve analyses, density tests, direct shear tests, and hydraulic conductivity tests to measure the grain size distribution, dry unit weight, friction angle, cohesion, and hydraulic conductivity of various shredded rubber-sand mixtures.…”

“…When the rubber particles deformed, the interaction becomes complex and the interpretation of the results becomes very complex. When the results from Figure 4 were compared to the friction angle of shredded tires reported by Cecich et al [1], and Moo-Young et al [12], the friction angles of shredded rubber-and mixtures were found to be notably higher. This means that the various mixtures can provide resistance against shear that is greater than that of shredded tires alone for the same normal stress as explained by Mohr-Coulomb failure equation.…”

“…The use of this new composite material may vary depending upon the application discussed in later sections, as a change in the degree of compaction will change the unit weight. In this study, unit weight of the material in its dry state at 60% Standard Proctor compaction energy was determined following ASTM D698 [16] and as suggested in Moo-Young et al [12] for shredded tires; a material similar to the new composite material used in this study. It should be noted that using the vibration method to compact the sample will easily segregate materials and therefore was not used.…”

New Formulations for Dynamic Behavior of Sand-Waste Tire Mixtures in a Small Range of Strain Amplitudes

“…There have been many studies on the compressibility properties of waste tire shreds [1,[16][17]. In general, the results of these studies concluded that when the tire scraps had an initially loosely packed structure, they have exhibited better compressibility than that of other tire shreds which were slightly denser.…”