ICE ABRASION TEST METHOD DEVELOPMENT USING ANTIFREEZE ON CONCRETE STRUCTURES

In sea areas covered with ice where active sea ice movement is seen, the degradation and deterioration of marine and coastal structures of concrete has been caused by freeze and thaw, salt damage and ice abrasion. So far, although the test methods of the ice abrasion on concrete have been developed, such methods have had common faults. For instance, one problem is that thin ice film grows gradually on the concrete surface to inhibit further abrasion of the concrete. For this reason, it was difficult to conduct an abrasion test between ice and concrete for a long period. In this study, we developed a new method of the abrasion test under water to prevent ice film from forming on the concrete surface. We used flouorinert as antifreeze, which has a freezing point of -127 deg. and is considered harmless in the concrete, in order to make it possible to perform the test under water. As results under various test conditions, we confirmed that the test method using by flourinert could prevent ice film from forming on the concrete surface and made it possible to conduct the ice abrasion test for a long time.