Combined determination device and method for combined water content of soft clay

A measuring device and water-binding technology, applied in measuring devices, using material absorption weighing, instruments, etc., can solve problems such as water molecule retention

Inactive Publication Date: 2017-05-10
JILIN UNIV
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Problems solved by technology

It makes the control of the water-gas equilibrium pressure more precise and simple, and the acid addition process is safer and more reliable; only one set of instruments can be used to complete the combined water measurement test, whi

Method used

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  • Combined determination device and method for combined water content of soft clay
  • Combined determination device and method for combined water content of soft clay
  • Combined determination device and method for combined water content of soft clay

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Embodiment Construction

[0054] see figure 1 and figure 2 As shown, the joint determination device for soft clay bound water content of the present invention includes a hydration system, an isothermal adsorption system and a measurement system;

[0055] The hydration system includes a volumetric flask 1 and a cyclotron oscillator 2. The volumetric flask 1 contains dry clay particles 3 and distilled water 4 that have been dried at 250°C; 5 and humidity-adjusting adsorption drier 6, the moisture-retention drier 5 is used to determine the water content of the hydrated clay and can provide moisture source to the humidity-adjusting adsorption drier 6, and its sump contains distilled water 4 and is connected to the left water inlet pipe 7 , water injection can be made to the sump of the drier by the water injection valve 8, the water injection volume can be read from the scale on the water inlet pipe, and the water injection valve can be closed after adding water to the desired value, and the water inlet...

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Abstract

The invention discloses a combined determination device and method for combined water content of soft clay. The combined determination device comprises a hydration system, an isothermal adsorption system and a measuring system; dry clay is sufficiently hydrated by a volumetric method; the water-air equilibrium pressure in a humidifying adsorption dryer can be adjusted by vapor provided by a moisture preserving dryer and sulphuric acid in an acid inlet pipe. A control system obtains test data through a weight sensor and a temperature and humidity sensor. Through the adoption of the combined determination device disclosed by the invention, the clay which is just sufficiently hydrated is obtained; the water content adsorbed on clay surface is measured under different water-air equilibrium pressure; the content of strong and weak combined water in the soft clay is obtained by an adsorption isotherm; the content of free water is obtained by the combination with an oven drying method. The combined determination device disclosed by the invention is simple, highly integrated, and safe and convenient to operate.

Description

technical field [0001] The invention relates to a device and a method for quantitatively measuring the combined water content of soft clay in geotechnical engineering and foundation engineering. Background technique [0002] Bound water in clay is due to the negative charge on the surface of clay particles, which adsorbs polar water molecules, and forms a water film around the clay particles that is different from free water. According to the distance between water molecules and the surface of clay particles and the size of the interaction force, bound water can be divided into strongly bound water and weakly bound water. Strongly bound water and clay minerals are connected by hydrogen bonds, arranged in an orderly manner, and tightly adsorbed on the particle surface, so it is also called adsorbed bound water or adsorbed water. It has a hexagonal island structure and has greater viscosity and shear strength. Hydrostatic pressure cannot be transmitted, and the content of str...

Claims

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Application Information

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IPC IPC(8): G01N5/02
CPCG01N5/025
Inventor 王常明李硕吴谦江南王冰张索煜邹琳琳张志敏
Owner JILIN UNIV
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