As the durability, reparability and maintainability of reinforced concrete structures are emphasized, the early perfomance degradation of concrete structures becomes a serious problem. Moreover, defects in construction materials and constructions inconsistent with the design promote the degradation of perfomance. Some worst buildings have fallen into an irreparable state within a few years. In particular, carbonation in concrete structures has been handled as the most fundamental and critical factor related to the durability of reinforced concrete. As a result, there have been efforts to develop repair materials to control carbonation. As one of these efforts, alkali recovery agents have been presented as materials for increasing the re-alkalization and durability of carbonated concrete structures. However, in applying them in the field, the performance and quality of concrete recovered after an alkali recovery agent is applied has not been fully assessed. Therefore, to examine the recovered perfomance of concrete structures resulting from the application of an alkali recovery agent, the present study assessed the depth of carbonation and the degree of deterioration of 20 years or older reinforced concrete structures, and analyzed the quality of concrete after applying an alkali recovery agent to the structures. This study aimed at providing basic infomation for the application of alkali recovery agents in the fleld. In this experiment, alkali recovery agents of the lithium silicate line, which are most common in Korea, were applied and cured using concrete of the same size. The degree of recovery was investigated according to the length of time in the initial curing stage, and based on the investigation, the maintenance perfomance of the alkali recovery agent was assessed according to the age of exposure to the open air. For these tasks, this experiment sampled concrete of different degrees of deterioration, applied alkali recovery agents to them, and observed re-alkalization and changes in the internal texture of the concrete.

특허결정은 특허출원인에게 유리한 결정이라 는 전제에서 특허법에서 별도로 불복의 길을 마련 하고 있지 않다. 그런데 특허법 제224조의2는 특허 여부결정(특허결정 및 특허불복결정)에 대하여는 다른 법에 따른 불복이 허용되지 않는다고 규정하 고 있다. 따라서, 특허출원인에게 불리한 점이 있는 특허결정에 대하여는 일응 행정소송이 허용되지 않는다 할 것이다. 그러나, 특허출원인의 보호 나아 가 발명자의 권리보호를 통한 경제발전이라는 특 허법의 목적을 위하여는 그 구제가 필요하다 할 것 이므로 특허결정에 대한 행정소송의 허용 여부에 대하여 검토해 보았다. 아울러 행정법상 확인인 특 허결정의 직권 취소 내지 철회와 특허법상 구제방 법에 대하여도 검토해보았다.