孔隙率对生态混凝土抗压强度及植生性能影响

Effect of Porosity on Compressive Strength and Planting Performance of Ecological Concrete

本文采用火山石为粗骨料制作不同孔隙率的生态混凝土,比较其抗压强度和植生性能;并用天然骨料以一定的比例替代火山石制成生态混凝土后测试其抗压强度。结果表明:生态混凝土的抗压强度随着孔隙率的增大而减小,植物生长高度随着孔隙率的增大而增大;火山石逐渐被天然骨料替代后,抗压强度随着替代率的增大而增大。因火山石有一定的吸污净化效果,若用于仅受冲刷或降雨等自然外力侵蚀的公路边坡或水库护坡,则不用考虑孔隙率的影响;若用于受力边坡,则孔隙率为20%或25%最佳。

In this paper,volcanic rock is used as coarse aggregate to make ecological concrete with different porosity,and its compressive strength and vegetative performance are compared.The compressive strength of ecological concrete is tested after natural aggregate is used to replace volcanic stone in a certain proportion.The results show that:the compressive strength of ecological concrete decreases with the increase of porosity,and the plant growth height increases with the increase of porosity;the compressive strength increases with the increase of replacement rate after volcanic stone is gradually replaced by natural aggregate.Because the volcanic rock has a certain effect of absorption and purification,if it is used for highway slope or reservoir slope protection which is only eroded by natural external forces such as scouring or rainfall,the influence of porosity is not considered;if it is used for stressed slope,the porosity of 20%or 25%is the best.