静态破碎剂是一种水合膨胀性物质,用于既无公害又安全地破碎岩石,拆除混凝土等构筑物。在城市拆除建筑物,从环境破坏和公害情况来看能适用的施工方法是有限制的。静态破碎剂于1979年4月开始出售,由于没有象炸药类和危险品方面的法规限制,所以不断扩大其适用范围。目前据估计使用数量为3000～3500吨/年,市场价值达20～30亿日元。但是,从去年开始,已出售比原产品在更短时间内就能破碎的产品。 Static breaker is a hydration intumescent material that is used to break rocks and remove structures such as concrete. Demolition of a building in a city has limitations in terms of construction methods that can be applied in the light of environmental damage and pollution. Static breakers were sold in April 1979. Since there are no regulatory restrictions on explosives and dangerous goods, their scope of application has continued to expand. At present, it is estimated that the amount used is 3,000 to 3,500 tons/year, and the market value is 2 to 3 billion yen. However, since last year, products that can be broken in a shorter time than the original product have been sold.