Technology for Recycled Aggregate Production Using Pulsed High Voltage Electric Discharge Underwater

在拆除混凝土结构时，需要处理大量含有大量混凝土的废弃物。然而，可填海的土地变得很少。为解决这一问题，将脉冲功率技术应用于混凝土破碎和废混凝土块骨料回收。通过室内试验结果，阐明了高压脉冲放电在水下将混凝土破碎、骨料从混凝土体中剥离和骨料表面处理的原理，是使高质量骨料再生成混凝土的有效方法。此外，通过回收骨料的再利用，估计可以减少70%的混凝土废物。

When the concrete structures are demolished, huge amount of waste, that contains much concrete should be disposed. However, the site for reclamation becomes little. To solve this problem, pulsed power technology has been applied to crushing concrete and reclaiming aggregate from waste concrete lump. From the results of laboratory, the principle of crushing concrete and delamination aggregate from concrete mass and treatment of aggregate surface is effective to reproducing high quality aggregate by high voltage pulsed electric discharge into concrete underwater was clarified. Further, the 70% of reducing concrete waste has been estimated by reusing of recycled aggregate.