Systematization of Manufacturing Technology and Application of Porous Concrete Considering internal Structure

本研究成果总结如下：1.研究成果。多孔混凝土的制备方法和强度特性(1)为了探讨具有优良强度性能的多孔混凝土的制备条件，研究了浆体体积、流动性和表面振动之间的关系。(2)多孔混凝土的抗压强度可以用浆体强度和空隙含量的指数函数表示。(3)在本试验范围内，骨料的绝对体积几乎不影响多孔混凝土的抗压强度和孔隙率之间的关系。再生骨料对多孔混凝土强度性能的影响(1)再生骨料强度与空隙率的关系受再生骨料强度的影响；当骨料发生断裂时，曲线向低强度区域移动。(2)仅通过再生骨料原始混凝土的抗压强度和含再生骨料的多孔混凝土的孔隙率，就可以很容易地预测再生骨料在多孔混凝土中可能开始断裂的强度水平。采用混凝土碎石制作大尺寸透水性混凝土(1)确定了合适的粘结剂的流动性和粘结性能，采用喷射法制备了大尺寸透水性混凝土结构。(2)研究了大尺寸透水性混凝土在渔滩上的适用性。吸声性能：(1)多孔混凝土板在中高频范围内具有合理的吸声能力。(2)多孔混凝土板的吸声特性受放置条件、面板表面状况和空隙分布等因素的影响。轻质多孔混凝土作为漂浮基地(1)通过种植水芹和水稻，验证了轻质多孔混凝土作为植物漂浮栽培种植基地的适用性。

Results of the present research is summarized as follows.1. Manufacturing method and strength properties of porous concrete(1) In order to discuss the manufacturing condition of porous concrete with excellent strength properties, the relationships between volume of paste, flowability and surface vibration were investigated.(2) The compressive strength of porous concrete can be expressed by the exponential function formula using paste strength and void content.(3) Within the present experiments, the absolute volume of aggregates hardly influences the relationship Between the compressive strength and void ratio of porous concrete.2. The effect of recycled aggregates on strength properties of porous concrete(1) The relationship between compressive strength and void ratio is affected by the strength of recycled aggregates ; the curve shifts to the lower strength region when fracture of the aggregates is considered to occur.(2) The strength level where recycled aggregates in porous concrete may start to fracture is able to be easily predicted only by the compressive strength of original concrete for recycled aggregates and the void ratio of porous concrete with them.3. Large-size porous concrete using concrete rubble(1) The appropriate fluid property and adhesion behavior of the binder are determined to produce the large-size porous concrete structure by spraying method.(2) The applicability to fishing banks of large-size porous concrete is indicated.4. sound absorption property(1) Porous concrete panels have reasonable sound absorption capacity in the middle and high frequency range.(2) The sound absorption characteristics of porous concrete panels is affected by the condition of placing, the surface condition and the air void distribution of the panels.5. Light weight porous concrete as floating base(1) The applicability of the light weight porous concrete as a planting base for floating culture of plants was examined by planting of the water-cress and rice.