Comparative Study on the Effect of Organic and Inorganic Fiber on the Anti-wheel Impact Performance of Airport Pavement Concrete under Freeze-thaw Environment

Abstract

Abstract In this paper, the poly-acrylonitrile synthetic fiber concrete (PSC) (the representative of organic fiber concrete) and alkali resistant glass fiber concrete (ARGC) (the representative of inorganic fiber concrete) were studied and compared. The test were carried out by the IMYD-X single side freeze-thaw machine of concrete and the modified wheel impact test machine which was pressurized and accelerated. The dynamic deformation and toughness performance of fiber concrete have been comparatively analyzed, and the effect of fiber on the performance of concrete has been investigated. Three concrete performance indexes were selected to evaluate the anti-wheel impact performance of the airport pavement concrete in freeze-thaw environment, namely relative mass ratio, relative compressive strength ratio, and relative dynamic modulus ratio. The results showed that adding fiber in the concrete can significantly improve these indexes. Four indexes of concretes decreased when the test durations increased, and the relationship between various indexes and test durations can be described as an exponential function. Moreover, all the indexes of fiber concrete increase with the increasing fiber volume content. The optimal content of both organic fiber concrete and inorganic fiber concrete were 1.6 kg/m3. From the overall trend, the relationship among fiber concretes by the anti-wheel impact performance in freeze-thaw environment can be listed as follow: ordinary concrete