Subgrade Resilient Modulus for Pavement Design and Evaluation

Laboratory Study on Properties of Rubber-Soils

“…Previous studies on resilient modulus of subgrade soils (e.g., Rada andWitczak, 1981 andLee, et al 1993) X X X X 35 X I X X X 4J < < < < < < < < < < < The reduction in modulus depends on level of confining pressures, deviatoric stress levels, and percent of chips.…”

“…Lee, et al1993;Rada and Witczak, 1981;and Elton and Ray, 1989 Lee, et al, (1993) The void ratio, composition, fabric, and degree of saturation are the major characteristics which govern the permeability of soils (Lambe and Whitman, 1969) . The coefficient of permeability was computed using the The results from permeability testing of rubber-soils have been summarized in Table 8.2; Figure 8.5; Bressette, 1984;Freeze and Cherry, 1979;Hunt, 1986;and Lambe and Whitman, 1969) .…”

“…Modulus for Pavement Design and Evaluation" has been concluded at Purdue University, West Lafayette, Indiana (Lee, et al 1993) .…”

“…The reader is referred to Lee, et al (1993) for a detailed description of testing equipment and software used for resilient modulus testing and data acquisition.…”