Thin Bonded Concrete Overlay and Bonding Agents

摘要

This report presents the construction procedures and initial performanceevaluation of a four-inch Bonded Concrete Overlay placed on Interstate 80 near Moline, Illinois. Preconstruction testing consisted of Falling Weight Deflectometer, permeability to chloride, and distress surveys. Surface preparation included: full-depth patching, partial-depth patching, bituminous material removal, shot blasting, and sand blasting. During construction of the overlay, concrete temperature, air temperature, wind speed, relative humidity, rate of evaporation, concrete slump, concrete air content, water-cement ratio, placement time, and overlay thickness were recorded. Testing conducted after construction of the overlay included: compressive strength, split tensile strength, distress surveys, location of delamination, Falling Weight Deflectometer, California Profilograph, International Roughness Index, friction, drying shrinkage of concrete, and bond strength.