植生型多孔混凝土物理性能及植生适应性研究

Physical Properties and Vegetative Adaptation of Eco-porous Concrete

为了深入研究植生型多孔混凝土的性能影响因素及植生适应性,本文制备了不同配合比的多孔混凝土,对其强度、孔隙率、pH值进行测试。将制备的试块进行自然碳化以使碱度满足植物生长的需求,在此基础上试种高羊茅、狗牙根、碱茅及三种混合草种。结果表明:多孔混凝土强度随目标孔隙率提高而降低,目标孔隙率越高,强度受水胶比影响越小,多孔混凝土实测孔隙率随水胶比增大而提高。植生试验证明,经过碳化降碱后的多孔混凝土虽然测试pH值较高但可以满足所选6种草种的生长需求,其中,高羊茅成坪速度最快,蓝兰景三号绿化效果最好。

In order to further study the influence factors of eco-porous concrete performance and capacity for plant growing,different mixing proportions are produced to test the strength,porosity and pH value of the porous concrete. The concrete blocks were carbonized in natural condition to meet the requirement of plant growth. Then the Tall Fescue,Bermuda,Puccinellia and other three mixed grass were planted on the blocks. The results indicate that the compressive strength of the eco-porous concrete is decreased by the raise of design porosity. With the increase of the design porosity,the strength is less infected by the water-binder ratio. Measured porosity increased when the water-binder ratio increased. The plant-growing test proves that the carbonized eco-porous concrete could meet the requirements of tested plant growth.Tall Fescue has the advantage of rapid turf-establishment and the garden greening on effect of Lan Lan JingⅢ is the best.