ABSTRACT
This paper presents the latest developments in non-demolition agents in Japan, considering both the demolition agent and demolition system. Special application of non-explosive demolition agent for a demolding system for false teeth is also discussed, as well as an anchoring system for FRP tendons etc. Keywords: Non-explosive demolition agent, Expansive pressure, Fast-acting nonexplosive demolition agent, Slow-acting non-explosive demolition agent, Demolition system
1 I n t r o d u c t i o n
In recent years, the use of heavy demolition equipments and explosives in the work of demolishing rock and concrete structure has been restricted or prohibited with consideration for the environment and safety. In these circumstances, the world's first non-explosive demolition agent was developed in Japan in 1979. Demolition system with non-explosive demolition agent possesses many advantages that is able to use for the demolition work of restricted condition ( narrow space, limited demolition) etc.. So, non-explosive demolition agent has been popular, in the other side, this agent has possessed of disadvantages that demolishing time (12 to 24 hours) is rather long, and it is difficult to demolish RC structure and thin concrete structure. Recently, however, fast-acting nonexplosive demolition agent was developed and the demolition system has also improved. So disadvantages of non-explosive demolition agent has been decreasing.
