Transportation Research Board 88th Annual MeetingTransportation Research Board · 2009 · 22 citations · 0 references
EngineeringCivil EngineeringMaterials EngineeringMaterials CharacterizationMechanical Behavior Of MaterialsPavement EngineeringMaterial DurabilityPavement MaterialsPavement Structural AnalysisPaving MaterialsRecycled Construction MaterialsRecycled MaterialsCompressive StrengthDurability Of Recycled PavementsFly Ash StabilizationFly Ash-stabilized MaterialsFreeze-thaw DurabilityResilient ModulusStructural Performance Of Recycled PavementsUnconfined Compressive Strength
Properties of a recycled pavement material (RPM) and a road surface gravel (RSG) stabilized with a Class C fly ash are compared to the properties of a conventional base material (Minnesota Class 5 base). California bearing ratio (CBR), resilient modulus (Mr), and unconfined compressive strength (UCS) tests were conducted to evaluate the effects of adding fly ash to the RPM and RSG to enhance their mechanical properties. Freeze-thaw durability was evaluated in terms of Mr and UCS. CBR, Mr, and UCS for RPM and RSG increased with fly ash content. Mr and UCS for RPM and RSG increased with curing time, with significant gains occurring after 7 and 28 d of curing. Addition of fly ash reduced plastic strains of the recycled materials during resilient modulus testing. Freeze-thaw cycling had a small effect on the Mr and UCS of the recycled materials. A strong relationship was found between summary resilient modulus (SRM) and UCS of recycled materials blended with fly ash, suggesting that the SRM can be estimated from a UCS test.