apply the latest technology, the crushing method, to the construction of new structures. Steel reinforced concrete structure (SRC), concrete filled tube structure (CFT), and reinforced concrete structure (RC) using high-strength and ultra-high-strength concrete are extremely difficult to demolish by the crushing method. These are important issues that must be resolved in the near future. The mass demolition of explosives utilized in the United States can also be seen in Japan as well: it was attempted at the 1988 Tsukuba Expo Dome, the Mitsubishi coal mine Takashima Company Housing (Fig. 13), and the 1992 Lake Side Building (Fig. 14). However, critics view that the application of the blasting method to buildings in Japan is not simple from the viewpoints of economic efficiency, safety, economic activity limitation, and crime prevention.It seems that collective demolition will continue to be difficult in the future, and technologies like miniature blasting and micro blasting, which demolishes members and block division levels using as few explosives as possible, seem to be useful. There are hopeful advancements that can be foreseen in the near future in this field.Fig. 11 Work during ground demolition workFig. 12 Work on demolition from upper floors─ 39 ─
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