Abstract
Demolition work of reinforced concrete buildings will increase markedly, thus entailing the need of a safer technique at lower cost. It is well known that explosive methods are the most effective to demolish concrete buildings with. But concrete buildings in Japan are supposed difficult to demolish, because they consist of powerfully reinforced beams and pillars and of many wall structures in order to endure seismic load. This study aimed to get basic data about the explosive demolition by various experiments in an existing concrete building. Experiments were made in two stages. Experiments in the first stage are to investigate the condition of blasting out members of the building. In the second stage, simple experiments concerning razing the building by blasting were made. From these experiments, the condition in which thin wall structures and beams are blasted out has been made clear, and the problem on razing the building with many wall structures by blasting has been made concrete.
