Newly developed adhesive strength test for measuring the strength of sealant between joints of concrete pavement
A new adhesive strength test (AST) was developed to determine the adhesive strength of joint sealant. A series of sealant thicknesses, displacement rates, and curing times was tested to determine proper AST testing parameters using self-leveling (SL) and nonself- leveling (NS) silicone sealants. A series of tests was conducted under varying moisture conditions. The results appeared to indicate that moisture may reduce adhesive strength. Drying-time tests were conducted to determine the approximate appropriate wait time between joint washing and sealant installation for 3.2 mm (1/8 in:) and 9.5 mm (3/8 in:) joints. A series of tests was also conducted on artificially aged sealants, which appeared to indicate that oven aging reduces adhesive strength for SL sealant. Non-self-leveling sealant, on the other hand, appeared to be largely unaffected by oven aging. Hot-water aging and freeze-thaw aging appeared to reduce adhesive strengths for both sealant mixtures.
Journal of Materials in Civil Engineering
Digital Object Identifier (DOI)
Li, Crowley, R. W., Bloomquist, D. B., & Roque, R. (2014). Newly Developed Adhesive Strength Test for Measuring the Strength of Sealant between Joints of Concrete Pavement. Journal of Materials in Civil Engineering, 26(12), 4014097–. https://doi.org/10.1061/(ASCE)MT.1943-5533.0001020