Figure 4.9. Interface friction angles () between RCA and geosynthetic reinforcements as well as other interface materials reported in the literature are summarized in Table 4.4. Figure 4.9. Interface direct shear results for RCA-Geosynthetic interaction, and respective Mohr-Coulomb failure criteria Table 4.4. Interface friction angles and efficiency factors for different interface materials. Efficiency Interface friction Interface type Source factor (Eφ) angle (δ) RCA-Woven geotextile This 26 0.44 Gravel 26 0.64 Hsieh et al. (2011) Crushed 30 0.41 et al. (2011) Sand 35 0.92 Hsieh et al. (2011) FDS 29 0.60 Goodhue et al. (2001) RCA-Nonwoven 22 0.36 This study geotextile RCA-Uniaxial geogrid 36 0.65 This study Gravel 44 0.95 Nejad et al. (2012) Sand 34 0.97 Nejad et al. (2012) FDS Goodhue et al. (2001) 26-32 0.60-0.80 RCA-Biaxial geogrid 39 0.73 This study
Figure 4.9. Interface friction angles () between RCA and geosynthetic reinforcements as well as other interface materials reported in the literature are summarized in Table 4.4. Figure 4.9. Interface direct shear results for RCA-Geosynthetic interaction, and respective Mohr-Coulomb failure criteria Table 4.4. Interface friction angles and efficiency factors for different interface materials. Interface type Source Interface friction angle (δ) Efficiency factor (Eφ) RCA-Woven geotextile This 26 0.44 Gravel Hsieh et al. (2011) 26 0.64 Crushed et al. (2011) 30 0.41 Sand Hsieh et al. (2011) 35 0.92 FDS Goodhue et al. (2001) 29 0.60 RCA-Nonwoven geotextile This study 22 0.36 RCA-Uniaxial geogrid This study 36 0.65 Gravel Nejad et al. (2012) 44 0.95 Sand Nejad et al. (2012) 34 0.97 FDS Goodhue et al. (2001) 26-32 0.60-0.80 RCA-Biaxial geogrid This study 39 0.73
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