摘   要：针对普通混凝土内部孔隙过少以及pH值过高而不利于植物生长的问题，研究了植生型混凝土孔结构改造和内部碱环境调节的方法。研究结果表明，利用吸收肥料溶液的聚丙烯酸钠系超吸水树脂球作混凝土骨料，结合掺加多孔的陶粒，或采用选择合适粒径的单一级配石子替代常规的连续级配石子，可有效增加混凝土内部孔隙，有利于植物根系生长。采用低碱度硫铝酸盐水泥作为胶凝材料，或通过加入含活性SiO2较多的物质与水泥水化反应产生的Ca(OH)2发生化学反应，可有效降低混凝土内部pH值，有利植物生长。 

Abstract: Plant-growing porous concrete, as a kind of concrete that can grow green plant on its surface, its investigation and application are meaningful to build the sponge city and protect ecological environment. However, low porosity and too high pH value of concrete are very unfavourable for plant growth. Modification methods of pore structure and internal alkaline environment of plant-growing concrete are investigated. The results show that adding sodium polyacrylate super absorbent resin ball absorbing chemical fertilizer solution and porous ceramsite, or single gradation stone with a suitable particle size, can effectively increase the porosity of concrete. Using sulphoaluminate cement as binding material, or adding mineral admixture containing reactive SiO2 which reacts with Ca(OH)2 formed by cement hydration, can significantly decrease internal pH value of concrete. Above methods are beneficial to the growth of plant roots.