多孔生态混凝土性能试验研究

Experimental Study on Performance of Eco-porous Concrete

多孔生态混凝土物理力学性能受配合比因素影响,为找出对应影响规律,本文制备不同水胶比、不同目标孔隙率的多孔生态混凝土,测试其物理力学性能。利用制备的多孔混凝土,设计试种试验,从6组草种中筛选出适宜多孔生态混凝土建植使用的草种。结果证明,多孔生态混凝土早期强度低,目标孔隙率越高,密实程度越低的多孔生态混凝土,成型后抗压强度越低,且其强度受水胶比影响更小。水胶比越高,制备的多孔生态混凝土实测孔隙率越高。试验所用草种中除狗牙根、紫羊茅与细弱剪股颖三种草种不适应多孔生态混凝土生长环境,其他草种均表现出良好适应性,其中,高羊茅最适宜作为多孔生态混凝土建植草种。

To find out the influence rule of mixing proportions on performance of eco-porous concrete, eco-porous concrete with different water-binder ratio and design porosity were produced and tested, and the mechanical properties were tested. Planting test was implemented to find the suitable one from 6 tested species. In conclusion, eco-porous concrete has lower strength in early age and higher target porosity. Compressive strength decreases with the design porosity. Strength and water-binder ratio prove to have weaker relationship for low density eco-concrete. Tested porosity increases with water-binder ration. All tested grass species grew normally in eco-porous concrete except Bermuda, Red Fescue and Agrostis tenuis, and Tall Feseue is best fit for eeo-porous concrete.