Study on ozone deterioration and repairing crack of bridge base-isolated rubber bearings

Abstract

Recently, on the surface of bridge base-isolated rubber bearings, quite a few cracks due to ozone deterioration are reported. In order to use bridge rubber bearings for a long term, the repair of the ozone cracks is indispensable. In this study, we performed the repair by using coating materials in ozone cracks of the bridge rubber bearings, and carried out a series of experiments to evaluate the repair performance of coating materials. Furthermore, we carried out ozone degradation accelerated exposure experiments to evaluate the ozone deterioration characteristics of the synthetic rubber materials which were superior in ozone resistant.