Study On Engineering Properties Loess Solidified By Polymer Material

Loess is a widely distributed in the loess plateau of Shanxi, Shanxi, and Gansu of China. Compared with general cohesive soil, loess is a special soil with large pore structure. Loess is particularly sensitive to water. Collapsible loess may contain relatively large amounts of calcium carbonate, as well as various soluble salts. The disintegration will occur when loess encountered in water. The disintegration to the project, especially in the water conservancy project, will bring great hazards, landslides and other disasters for the buildings on loess ground. It not only affects normal use and safety to the buildings, but makes the building completely destroyed in serious cases. So, in the loess region, we must carry out the reinforcement to foundations, the channels and other projects.The traditional reinforcement methods and the traditional curing agent such as dynamic compaction and cement, they have many shortages. When we are dealing with the foundations, channels impermeable and other projects in the loess area. Because of this, the solidifying agent of SH is used for the loess in Taiyuan in Shanxi province. The experimental study on the compressive strength, shear strength, penetration resistance and water stability of loess solidification for the content and curing period have been carried out. The change regulation and the improving effect of water resistance are explored for loess solidification on compressive strength, shear strength and impermeability in different curing period and content of SH. The results provide a new scientific evidence for the foundation treatment in the loess area, and can be applied on the channel seepage, slope protection and road sub grade engineering in the loess areas. It is of great significance to practical application of SH.the results of the experimental study show that:(1) The strength and water resistance of loess solidified by SH is better than natural loess.(2)Along with the increase of the SH content, the compressive strength, and shear strength gradually are gradually increased. With the growth of the curing period, the compression, shear strength of loess solidified continue to increase, but the trend is relatively slow. This shows that loess solidified will take some time to make the strength effectively. The strength of loess solidified for curing28days is basically completed.(3) With the increase of the curing period and the curing agent, the permeability coefficient of loess solidification gradually decreases. The orthogonal experiment of the anti-permeability results show the effect on the content of curing agent for the permeability coefficient is greater than the curing period. When the curing agent content is greater than0.5%, the permeability coefficient loess solidification by SH is less than1×10-6cm/s.(4) When the SH content is greater than0.5%, the samples of loess solidified by SH disintegrate in the immersion for a long time. which indicates good water resistance.It has high strength and strong anti-disintegration, which can improve the foundation bearing capacity and water stable of loess, loess collapsibility and such poor engineering properties can be improved. SH will have a broad application prospect.