不同因素对赤泥改良黄土渗透系数的影响研究

为模拟工厂酸性污水和酸雨对赤泥改良黄土渗透系数的影响，选取硫酸作为渗滤液进行渗透试验。将不同含量的赤泥掺入到黄土中，测试了赤泥改良黄土的渗透系数，探讨了渗透压强、硫酸浓度、孔隙比和赤泥含量对渗透系数的影响。试验结果表明：渗透系数随渗透压强的增大基本趋于稳定；渗透系数随硫酸浓度的增大先增大后减小；渗透系数与孔隙比呈指数关系，随孔隙比的增大快速增大；渗透系数随赤泥掺入量的增大而减小，赤泥的掺入助于提高黄土的抗渗性，当赤泥含量在15%左右时，渗透系数较小。

The effect of different factors on permeability coefficient of loess improved by red mud

In order to simulate the effect of acidic wastewater and acid rain on the permeability coefficient of loess which improved by red mud, the sulfuric acid was selected as the leachate. The effects of osmotic pressure, concentration of sulfuric acid, porosity ratio and content of red mud on the permeability coefficient were studied though the permeability test of improved loess. The results show that the permeability coefficient is stable with the osmotic pressure. The permeability coefficient increases firstly and then decreases with the increase of the concentration sulfuric acid. Besides, the permeability coefficient decreases with the content of red mud increases, the addition of red mud helps to improve the impermeability of loess. When the red mud content was about 15%, the permeability coefficient was small.