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46 ABBREVIATIONS AND ACRONYMS Abbreviation Definition AADT Annual average daily traffic ARRA Asphalt Recycling and Reclaiming Association CIR Cold in-place recycling CIREAM Cold in-place recycling expanded foam asphalt DCP Dynamic cone penetrometer EE Engineered emulsion ER Emulsified recycling (agent) ESAL Equivalent single-axel load FDR Full-depth reclamation FWD Falling weight deflectometer GPR Ground-penetrating radar HMA Hot mix asphalt IDT Indirect tensile strength IRI International roughness index OGFC Open-graded friction course PCA Portland Cement Association PG Performance grading PI Plasticity index QA Quality assurance QC Quality control RA Recycling agent RAP Reclaimed asphalt pavement RTFO Rolling thin film oven (testing) R-value Resistance value (used to determine load-carrying ability of soils) TSR Tensile strength ratio
