Constructability and Performance of Prospective Materials for Repair of Airfield Damaged Concrete
The surfaces of concrete airfield aprons and runways deteriorate for a number of reasons, such as surface scaling due to freeze/thaw, impact loading, hot weather, de-icing fluids, deterioration of joints, jet fuel chemicals and so on. A limited field and laboratory study was performed to investigate the constructability and performance of prospective materials for repair of airfield concrete damaged by exposure to heat and oil. Two prospective coating materials and six prospective inlay materials were field-testes at the Base in USA Kansas, and were evaluated in the laboratory at the University of Florida before and after the field installation. The results of the study indicate that it is feasible to repair these damaged concrete surfaces by placing a suitable inlay material with a minimum depth of 2 inches. Among the prospective inlay materials investigated, two promising materials for this application are a magnesium phosphate concrete (Set-45) and a calcium aluminate concrete (Fondag). Both two concretes set very quickly, and make high early-strength, impermeable patches that bond to clean and dry surfaces. Guidelines for the placement of inlay materials for this purpose are proposed based on the experience from this study.
Joong Hee Lee
M. J. Lee et al., "Constructability and Performance of Prospective Materials for Repair of Airfield Damaged Concrete", Advanced Materials Research, Vols. 123-125, pp. 407-410, 2010