多孔混凝土植被砖的立体绿化应用

Application of Porous Concrete Brick in Vertical Greening

根据立体绿化环境特点,旨在研制出适用于立体绿化墙面和屋面绿化施工用的多孔混凝土植被砖,并筛选出抗逆性强的植物。结果表明,水泥的理化性质会影响植物的生长,当水灰比在0.25、集灰比为3∶1、碎石作为粗集料,可以制得有效孔隙率大于20%并且抗压和抗折强度较高的多孔混凝土植被砖。研究发现,多孔混凝土植被砖的抗压与抗折强度与集料尺寸大小成反比,随着集料尺寸的增大,多孔混凝土植被砖的抗压和抗折强度都随之降低。通过植生试验发现,垂盆草与佛甲草在植被砖上长势较好,盖度高且抗逆性强。研制出的多孔混凝土植被砖已成功应用于立体绿化中,具有快捷、低成本的特性,易于推广。

Based on the environmental characteristics of stereo greening, the utility model of porous concrete brick which suitable.for the construction of the three-dimensional greening wall surface and the roof greening construction was expected to be developed, while the plants with strong resistance were screened. The results showed that the physical and chemical properties of cement can affect the growth of plants, and when the water cement ratio is 0.25, the ash collection ratio is 3： 1, and the crushed stone is used as coarse aggregate, the porous concrete with effective porosity of more than 20% and high compressive strength and flexural strength can be obtained. It is found that the compressive strength and flexural strength of porous concrete are inversely proportional to the aggregate size, and the compressive strength and flexural strength of porous concrete decrease with the increase of aggregate size. The planting test found that sarmentosum and sedum lineare grew bet- ter in vegetation brick, with high coverage and strong resistance. The porous concrete brick has been successfully applied in the three-dimen- sional greening, which has the characteristics of fast and low cost, and is easy to be popularized.