MODELING OF UNREINFORCED AND REINFORCED PAVEMENT COMPOSITE MATERIAL USING HISS MODEL

With the advent of high strength geogrids, the interest of civil engineers in usinggeosynthetics as reinforcelnent material in pavement construction has increased. an experimentalstudy is carried out at jit delhi to understand the effect of geogrid in unpaved roads. behavior ofcolnposite inaterial vhich comprises of yamuna sand as subgrade and water bound macadam(wbm) as base course is studied vith and vithout geogrid reinforcement under drained conditions. agcogrid is used as reinforcing material. drained triaxial tests were perfonned at three differentconfining pressures of 50. 100 and 200 kpa on both unreinforced c0l11posite and reinforced compositeinaterials of specimen size 100mm dian1eter and 200mm height. hierarchical single surface (hiss)nlodel developed by desai and co-workers is used to nlodel the unreinforced and reinforcedcomposite material. a colnputer program para6 is used to calculate the various parameters and toback predict the stress-strain-volume change behavior of unreinforced and reinforced conlposite111aterials. the predicted results n1atch closely with the observed results.