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Louisiana Transportation Research Center (LTRC)Use of Geogrids in Aggregate Base RoadwaysCEES 5020Introduction to GeoSyntheticsFall 2009By: Roy KhalifeDhaval MhetaTo:Dr. Kianoosh HatamiDate: 12-02-09Table of ContentsExecutive Summary3Introduction5Research Histroy:5Review and Discussion6Case History: Use of Tensar and Tenax Geogrids for Base Course Stabilization, Lakeshore Drive Improvement Project6Project Description:6Subgrade Condition:6Test Sections:7Stage One Construction:7Stage Two Redesign:7Stage Two Construction:8Study One: Effect of reinforcement on resilient and permanent deformations of base course9Objectives and scope9Marerial Properties9Samples Preparation9Testing and Discussion of results10Study 2: Laboratory characterization of Reinforced Crushed Limestone under Monotonic and Cyclic Loading12Objective and Scope:12Material Properties:13Testing Setup:14Triaxial Compression Test:14Resilient Modulus Test16Permanent Deformation Test17Conclusion18Similar Recent Studies19References:19List of FigurFigure 1: Specimens setup and geogrid arrangement10Figure 2: Vertical permanent strain versus number of load cycles11Figure 3: Vertical permanent strain rate versus vertical permanent strain11Figure 4: Permanent deformation curves for geogrid type I and II12Figure 5: Permanent deformation curve for geogrid type III12Figure 6: Particle size distribution of tested crushed limestone material13Fi

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