1Evaluation of Feasibility of Using Evaluation of Feasibility of Using Composite Pavements in FloridaComposite Pavements in FloridaBy Means of HVS TestingBy Means of HVS TestingByByMangTia Patricio TapiaWasanthaKumara ChungKumara Chung-Lung WuResearch NeedIncreasing truck Increasing truck loads and tire pressurepressureRutting and surfaceRutting and surface-initiated cracking in asphalt pavementsasphalt pavementsAdvantages of WT-Resistant to rutting and surfacesurface-initiated crackinginitiated cracking-Better long-term performanceIncreasing price of asphaltasphaltThere is a need to effectively evaluate the feasibility and proper application of WT pavements in FloridaPossible Solution: Whitetopping (WT)Types of Types of WhitetoppingConventional Conventional WhiteWhite-topping topping (CWT)(CWT)Thin WhiteThin White-topping (TWT)topping (TWT)UltraUltra-thin Whitethin White-topping (UTW)topping (UTW)> 8”5” - 8”< 5”How does unHow does un-bonded bonded WhitetoppingWhitetoppingwork?work?How does bonded How does bonded WhitetoppingWhitetoppingwork?work?N.A.Effects of joint spacingEffects of joint spacing
This preview has intentionally blurred sections.
Sign up to view the full version.
2Effects of temperature differential in the concrete slabObjectivesObjectivesTo develop analytical models for analysis of the To develop analytical models for analysis of the behavior of UTW, TWT and CWT pavements. These models are to be verified and fineThese models are to be verified and fine-tuned tuned by experimental results.by experimental results.To evaluate the potential performance of the WT To evaluate the potential performance of the WT pavement test sections for use under Florida conditions. To assess the applicability of UTW, TWT and CWT techniques for rehabilitation of asphalt pavements in Florida.ApproachRun full scale experiments with proper Run full scale experiments with proper instrumentation instrumentation Develop a reliable model and methodology Develop a reliable model and methodology to analyze the behavior of WT pavements to analyze the behavior of WT pavements under the effects of load and temperatureunder the effects of load and temperaturecalibrate and verify the analytical model calibrate and verify the analytical model observe relationships between performance observe relationships between performance (distresses) and measured strains and (distresses) and measured strains and calculated stresses calculated stresses Approach12 kip load4-inch slab-3.5E-05-3.0E-05-2.5E-05-2.0E-05-1.5E-05-1.0E-05-5.0E-060.0E+005.0E-061.0E-051.5E-0500.511.522.5Time, secStrain, in/in3D Modelmeasured Analytical Tool to predict the behavior of WT pavementsModel CalibrationDesign recommendationsThermocoupleGaugeWheel Path Direction6" Slab / Mid-Top - Monday June 20 2005 1605-25-20-15-10-50510051015202530Time (sec)Strain (x10-6)Analytical ModelAnalytical Model3D Solid ElementInterfaceJointsAnalytical ModelAnalytical Model