关键词: 赤泥;龄期;电阻率;抗剪强度

Abstract: As the comprehensive utilization of red mud is not high,a large number of red mud which is stacked bring a negative impact on the environment,so improved the utilization of red mud is particularly important.Five kinds of curing agents were used to improve the loess,the electrical resistivity of the modified loess was measured during direct shear,and the influence of age on the electrical resistivity and shear strength of the red mud roadbed were analyzed.The optimum water content was determined by compaction test,and the samples were cured at the optimal water content for 3 d,7 d,14 d and 28 d.The results show that electrical resistivity increase with the increase of deflection in different age.The electrical resistivity and shear strength are logarithmically correlated with age,and they increase with the curing age.With the increase of red mud incorporation,the conductive ions increased,the electrical resistivity decreased.Under the same red mud content,the shear strength increases with the increase of vertical pressure.The linear relationship between shear strength and electrical resistivity is obtained.

Key words: red mud;age;electrical resistivity;shear strength