Abstract
The durability of highly expansive material for anchoring of continuous fiber reinforcement, FRP tendons, was investigated from the stand point of material by using accelerating tests and an exposure test, in which the highly expansive material was filled in a steel sleeve and attained expansive pressure. During the curried out tests, i. e. wet-dry, accelerated neutralization, freeze-thawing and exposure in out-door condition, the expansive pressure increased with time, similar to the standard curing condition and reach up to 80MPa within one year. The degradation of expansive material was observed from the end of the steel sleeve. However, the epoxy sealing can protect the ends. The reduction of effective fixing length was less than 1.0% in the case of the sleeve length longer than 200mm and was considered to be negligible. It became clear that the anchoring system with highly expansive material was stable for a long term.
