Based On The Effect Of Different Curing Agents And The Change Of Mechanical Properties Of Sludge Improved Research

Cement soil is widely used in engineering. However, engineering practice shows that, when the moisture content of the mud is high and organic is rich, cement solidified mud often makes low strength of the stabilized soil. It is difficult to pile in the concrete mixing pile construction process, which makes the cost increase. So it is necessary to select the suitable admixture to improve the performance of the cement soil. This paper reviews the results of the soil curing agent research and summarize the process and present situation of the the soil curing agent research, and put forward the countermeasures of the silty soil curing. Determine the optimal formula of curing agent for swim mud soil based on laboratory single and orthogonal test. Reflect and verify the reinforcement effect of the recipe in two aspects of macroscopic and microcosmic. At the macro level, analyze the effects of various factors on the strength of the stabilized soil though some routine test, such as unconfined compression test, penetration test, compression test, triaxial test and direct shear test. Measure the effect when silt was strengthened by permeability index, deformation index and strength index. Compare and analyze the microstructure of solidified soil though the analysis of the electron microscopy scanning pictures and X-ray diffraction images.Here are the main content:(1) Through laboratory tests to determine its composition (especially the organic matter content and type) and the basic physical mechanics index; By X ray diffraction experiment and electron microscopy scanning test of uncured and cured soft soil to research their microstructure;(2) To preliminary find the influence of the Cement, Water-reducer, Sodium Silicate, Gypsum and Calcium oxide, and define their volume range by unconfined compression single adding test;(3) Analyze the influence of different mixing amount of curing agent and curing time on the strength of solidified soil by orthogonal experiment, and preliminary screening out an efficient hybrid curing agent;(4) Best fit by regression analysis and may be the dosage and intensity regression equation;(5) Analysis of the changes of mechanical properties of high performance mixed curing agent is selected in the silt before and after adding by the contrast macro test, such as direct test, penetration test, and triaxial tests.(6) By the analysis of the void distribution and product of sludge before and after consolidate, from the microscopic point of view to analyze the curing effect of solidified soil by the microscopic contrast test, such as electron microscopy scanning test and X ray diffraction test.