Abstract:
Pavement distresses such as Rutting, fatigue, Potholes are common Pavement distress that causes the pavement failure at early design life of pavement which causes huge financial constrain to national exchequer. Since developed countries are adopting pavement preventive technique as compared to pavement reconstruction. This strategy of pavement prevention can be beneficial for developing countries to enhance serviceable life of Pavement which can save huge amount of Cost. In this research four different Pavement section were selected based on the type of treatment applied on that specific section along Islamabad-Lahore motorway (M-2), Pakistan. The first pavement section was a blend virgin 60/70 asphalt mix (Rap 0%, CR 0%), the second pavement section was asphalt concrete with crumb rubber modified bitumen as binder (Rap 0%, CR 7%), the third Pavement section was blend of 15 percent Rap with grade 60-70 bitumen as binder (Rap 15%, CR 0%), the fourth section was asphalt concrete wearing course with grade 60-70 bitumen as binder(Rap 15%, CR 7%). Cores were extracted from the selected four section which were further evaluated at laboratory for different pavement distresses such as rutting, fatigue and damage induced to pavement due to moisture at lab. It is concluded that section 4 (Rap 15%, CR 7%) performance against rutting and fatigue resistance is substantially better than other pavement sections while section 1 (Rap 0%, CR 0%) performance against moisture induced damages is higher than the other section. Moreover it is observed that section 4 (Rap 15%, CR 7%) is also more resilient than the other pavement sections.
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List of Abbreviations AASHTO American Association of State Highway & Transportation Officials ASTM American Society of Testing Materials RAP Reclaimed Asphalt Pavement CRMB Crum Rubber Modified Bitumen ITFT Indirect Tensile Fatigue Test TSR Tensile Strength Ratio MR Resilient Modulus ITS Indirect Tensile Strength HWTT Hamburg Wheel Tracking Test ACWC Asphalt Concrete Wearing Course PG Performance Grade M-2 Motorway (Islamabad-Lahore), Pakistan HMA Hot Mix Asphalt SHRP Strategic Highway Research Program LVDT Linear Variable Differential Transducer UTM Universal Testing Machine
