Development of Water Purification Systems using Porous Concrete with Little Maintenance

本研究开发了利用多孔混凝土和饲喂生物对滨水土建结构物进行水净化的系统，实现了少维护。对多孔混凝土的净水性能和耐久性进行了研究。主要结果如下：(1)采用合适的材料和孔洞特性，多孔混凝土具有较高的净水能力。(2)在低潮区存放两年的多孔混凝土的最低抗压强度约为初始强度的一半。(3)可以确定，2年后，采用多孔混凝土的净水试验场中的取食生物种类与下一个10多年前修建的混凝土海堤的相同。(4)由于氧气浓度低，采用多孔混凝土的净水试验场的海岸沉积物深底为黑色淤泥。另一方面，那座工厂的浅底有一小块海岸沉积物。认为浅水区浅底有较多的水生生物，而水生生物对海岸沉积物有侵蚀作用(5)，由此得出水边土建结构采用多孔混凝土和补给体的净水系统，维护费用低。

This study was developed the systems of water purification on waterside civil structures using porous concrete and feeding organisms to realize with little maintenance. An assessment of water purification and durability for water of porous concrete were investigated. Main results were as follows(1) The higher ability of water purification on porous concrete was obtained using proper materials and void characteristic(2) The lowest compressive strength of porous concrete which is stored tow years in the zone of low tide, is around half of initial strength(3) It could be confirmed that there were about same number of kinds of feeding organisms in the water purification testing plant using porous concrete than that of the next concrete seawall constructed over 10 years ago after 2 years(4) The coastal deposit deep bottom of the water purification testing plant using porous concrete was black mud because of low oxygen concentration, on the other hand there was a little coastal deposit on shallow bottom of that plant. It is considered that there were many Bivaivia on the shallow bottom and Binvaivia had eaten the coastal deposit(5) From above results, it is obtained that the systems of water purification on waterside civil structures using porous concrete and feeding organisms with little maintenance