页岩陶粒植生型多孔混凝土制备与植生试验研究

发布时间：2018-06-25 16:30

本文选题：页岩陶粒 + 多孔混凝土　；参考：《长江科学院院报》2017年12期

【摘要】：为了研究页岩陶粒的颗粒级配对植生型多孔混凝土密度、抗压强度、空隙率以及内部空隙p H值的影响,设置2种页岩陶粒颗粒级配,测其堆积密度、表观密度、空隙率和吸水率等基本物理性质,对页岩陶粒进行植生型多孔混凝土的配合比设计计算。黄棕壤土中掺杂适量的粉煤灰、复合肥、Fe SO4和醋酸乙烯乳液制成改性土壤,改性土壤、腐殖质、蛭石粉末按2∶2∶1的比例加水调成流动度为210~240 mm的种植基质浆体,采用上置式和中置式2种种植构造进行植生试验。结果表明:12组植生型多孔混凝土的密度随颗粒级配和设计目标空隙率的变化在600~800 kg/m3之间变化,28 d龄期的混凝土抗压强度在5 MPa以上,内部空隙部位的p H值在11~12之间;配制的种植基质取得了良好的植生效果,在必要的养护和管理条件下,植物完全可以在2种种植构造中健康地生长。
[Abstract]:In order to study the effects of particle gradation of shale ceramsite on density, compressive strength, porosity and pH value of inner voids, two kinds of shale ceramsite particle gradation were set up, and their stacking density and apparent density were measured. The basic physical properties such as porosity and water absorption are used to design and calculate the mix ratio of shale ceramsite for phytogenic porous concrete. The modified soil was prepared by mixing proper amount of fly ash, compound fertilizer FeSO _ 4 and vinyl acetate emulsion in yellow brown soil. The humus and vermiculite powder were mixed with water at 2:2:1 to form an implant matrix slurry with a fluidity of 210 ~ 240 mm. Planting experiments were carried out with two kinds of planting structures: upper and middle planting structures. The results show that the compressive strength of the concrete with 28 d age is more than 5 MPA and the pH value of the inner voids is between 11 ~ 12 with the change of particle gradation and the void ratio of the designed target. The compressive strength of the concrete is above 5 MPA for 28 d age and the change of the porosity ratio of the designed target is between 600 and 800 kg/m3. Under the necessary conditions of conservation and management, the plants could grow healthily in the two planting structures.
【作者单位】：三峡大学土木与建筑学院;三峡大学三峡地区库区地质灾害教育部重点实验室;三峡地区地质灾害与生态环境湖北省协同创新中心;
【基金】：国家自然科学基金项目(41202250) 长江科学院开放研究基金项目(CKWV2015205/KY) 三峡大学研究生科研创新基金项目(SDYC2016023)
【分类号】：TU528.2

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