700密度等级渣土陶粒制备及其性能研究

发布时间：2018-06-22 11:40

  本文选题：渣土 + 渣土陶粒　； 参考：《硅酸盐通报》2017年07期

【摘要】：为进一步促进城市渣土资源化利用,本文研究了原材料(渣土、粉煤灰、污泥和秸秆)和温度对渣土陶粒密度等级的影响,确定了700密度等级,不同粒径(10~15 mm、15~25 mm)的渣土陶粒配方和工艺。在上述基础上,通过超景深光学显微镜和扫描电镜观察分析了700密度等级,不同粒径下渣土陶粒的表面和内部微观结构。研究结果表明:(1)焙烧温度分别为1200℃和1230℃,渣土-粉煤灰质量比例相应为70∶30和60∶40时,可分别获得粒径为15~25 mm、10~15 mm两种粒径,密度等级均为700的渣土陶粒;(2)渣土陶粒的筒压强度和密度随着粒径的减小而逐渐增加,筒压强度由15~25 mm下的4.3 MPa增加到4.9 MPa;烧失量和1 h吸水率随着粒径的减小而逐渐降低;(3)随着粒径的减小,相同密度等级的渣土陶粒表面和内部结构不同。大粒径陶粒表面和内部结构中含有的孔隙较多,孔径尺寸较大。
[Abstract]:In order to further promote the utilization of urban residual soil, the effects of raw materials (residue, fly ash, sludge and straw) and temperature on the density of residual clay were studied, and the density grade of 700 density was determined. The formulation and process of the residue ceramsite with different particle size (10 ~ 15 mm ~ 15 mm ~ (25 mm). On the basis of the above, the surface and internal microstructure of residual clay with 700 density grades and different particle sizes were analyzed by means of optical microscope and scanning electron microscope. The results show that: (1) when the calcination temperature is 1200 鈩，

本文编号：2052716