Coatings for concrete surfaces

Publisher Summary This chapter presents a combination of test methods and models to predict mass change and pinhole effect for coated concrete. It discusses test and analytical results for epoxy and polyurethane coatings. A series of full-scale and laboratory tests are developed to evaluate the performance of coating materials for protecting dry and wet concrete substrates exposed to sulfuric acid environments. Commercially available polymer and cement-based coatings are studied for a period of over five years. Analytical models are developed to predict mass change and holiday size effect on coated concrete. The performance of epoxy coated concrete in de-ionized (D.I.) water and 3% sulfuric acid is investigated. The chapter provides observations based on the experimental results and analyses. The full-scale hydrostatic test was used to evaluate the applicability of coatings onto concrete and two bonding tests were modified, based on the ASTM standards. Chemical resistance tests can evaluate the acid resistance of coated concrete. The film model and concrete model can be used to predict mass increase of coated concrete in reactive and non-reactive solutions.