A method for artificially preparing flocculated clay in coastal areas

An artificial preparation, flocculation-like technology, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of structural disturbance, high cost investment, etc., and achieve stable physical and mechanical properties, good sample quality and consistency. Effect

Active Publication Date: 2020-05-12
ZHEJIANG UNIV
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Problems solved by technology

[0004] The technical problems to be solved in the present invention mainly include the following points: 1) provide a simple, reliable, effective, and excellent performance indoor method for artificially preparing flocculated clay, effectively solving the problems of structural disturbance and high-cost input for on-site sampling; 2) ) can prepare high-quality samples with good repeatability and uniformity in batches, and the preparation method should be able to achieve a clay structure with a high degree of flocculation; 3) this method can understand the relationship between the preparation process parameters and the sample performance indicators Physical and Mechanical Properties of Artificial Coastal Clay

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  • A method for artificially preparing flocculated clay in coastal areas

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Embodiment Construction

[0015] (1) Prepare a certain concentration of dispersant solution: Pour 200mL of deionized water into a 500mL beaker, weigh 4g of sodium hexametaphosphate powder and add it to deionized water, stir with a glass rod until completely dissolved.

[0016] (2) Prepare a kaolin sample with 2 times the liquid limit: add a total of 125g of standard commercial kaolin powder in five batches to the solution obtained in the previous step (the kaolin used this time is provided by Kaolin (Malaysia) Sdn Bhd), and slowly dissolve it Pour in the above solution, stir while pouring to avoid air bubbles and agglomeration, and continue stirring until the powder is completely mixed with the solution after pouring in completely.

[0017] (3) Add an appropriate amount of flocculant and stir evenly: Weigh 2g of polyaluminium chloride powder, and add the above kaolin mud, and keep stirring during the adding process, it can be seen that the consistency of the mud increases and the stirring resistance inc...

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Abstract

The invention discloses a method for manually preparing flocculent clay in a coastal region. The surface charge of kaolin particles is changed by chemical reagents, and the flocculent clay is preparedby the aid of a step-by-step loading prepressing technology. The method includes the steps: preparing dispersing agent solution, adding kaolin powder and mixing the dispersing agent solution and thekaolin powder to form slurry; adding flocculants and mixing the materials; applying load step by step to form a sample; performing step-by-step unloading according to the reverse order of load application; cutting and finishing the sample to finally obtain a flocculent clay sample. Compared with an existing method, the method has the advantages that a more loose and reliable flocculent structure can be acquired, and the flocculent clay with high water content in the coastal region can be more effectively simulated.

Description

technical field [0001] The invention relates to a method for preparing flocculated clay in coastal areas by using kaolin materials, in particular to a method for artificially preparing flocculated clay by using chemical reagents to change the arrangement of kaolin particles. Background technique [0002] In the natural state, coastal clay often has a flocculation structure. For example, the microstructure of clay in Zhanjiang, a typical offshore area, is a directional and disordered open flocculation structure with colloidal bonding characteristics; the fourth layer of silty soft clay in Shanghai There are mainly flocculation structure and honeycomb-flocculation structure, and their structural units are mostly flakes, which are easy to form an overhead structure with high void ratio in muddy soil; the soft soil in Tianjin Binhai New Area mainly has a flocculation-like aggregate structure. The flocculation structure of coastal clay is easily disturbed during the sampling proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/40
CPCC01B33/40
Inventor 傅了一周建张天骄罗凌晖龚晓南
Owner ZHEJIANG UNIV
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