Abstract
Chloride-induced corrosion of reinforcement is a serious problem that threatens the durability and strength of concrete structure. In order to suppress the corrosion of reinforcing bars, a salt adsorbent was chemically synthesized which could adsorb excess amounts of chloride ions and release nitrite ions. Large-size specimens partly repaired with mortars containing the adsorbent were exposed to a natural environment. It was found that the reinforcing bars have been varied to a sufficiently high-level passivation state. We call a new repair method established by using these corrosion inhibitors of the salt adsorbent, suppressing salt injury method (SSI method). The method was applied to actual concrete railway structures. The structures which were repaired by the SSI method have been maintained at a sound state.
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