Abstract
The increased use of geogrids in highway pavement sub-base layer reinforcement applications has resulted in a need to better understand the soil–geogrid interface properties for the use in analysis and design. For this purpose, a series of laboratory large scale pullout tests was carried out with three different aperture size geogrid samples randomly sampled from a single manufacturer. It was found that geogrids are unique in their pullout performance within pavement sub-base layer structure based on their aperture sizes. Analysis indicates a strong relationship between pullout performance and geogrid aperture size of geogrids at moderate normal stress levels. Such findings aid in selection of appropriate geogrid types for subgrade and sub-base interface reinforcement purposes. Further experimental analysis was conducted to investigate the wide-width tensile test performance for the same samples used in the pullout tests in this study.
Highlights
Geogrids are the products of choice for subbase and subgrade stabilization and base reinforcement applications
It is important to note that these conclusions are based on research performed with three different aperture size geosynthetic reinforcing materials compacted between the subgrade and the subbase soil layers
As demonstrated by this study, it was found that geogrids are unique in their pullout performance within pavement subbase layer structure based on their aperture sizes
Summary
Geogrids are the products of choice for subbase and subgrade stabilization and base reinforcement applications. The reinforcing system, depending on geosynthetics tensile characteristics, can minimize the vertical settlements between high quality fill material and poor foundation soils resulting in an increased road performance (Palmeira, Antunes 2010). Moraci and Gioffrè (2006) compared the pullout test results conducted on the three different geogrids with the same normal stress and embeded anchorage lengths They observed that peak interface apparent coefficient of friction of soil–geogrid interface was strongly affected by the shape geogrids geometry and applied confining stress but less affected by the geogrids longitudinal tensile stiffnesses and reinforcement length. Three types of rectangular aperture size geogrids are analysed between the pavement subbase layer and compacted subgrade layer For this purpose, pullout tests were carried out with three different aperture size geogrid samples randomly sampled from a single manufacturer.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
