Volume substitution method for measuring soil grain density and equipment

A soil particle and volume technology, applied in the field of soil science, can solve the problems of complicated operation and limited measurement range, and achieve the effect of simple operation process, good equipment stability and good application prospect.

Inactive Publication Date: 2014-02-19
CHINA AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome problems such as complicated operation and limited measurement range of the pycnometer method, float method, and siphon cylinder method for

Method used

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  • Volume substitution method for measuring soil grain density and equipment
  • Volume substitution method for measuring soil grain density and equipment
  • Volume substitution method for measuring soil grain density and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 The present invention measures the equipment used in the volume replacement method of soil particle density

[0052] The structure diagram of the equipment used in the volume replacement method for measuring soil particle density in the present invention is as follows figure 1 As shown, it includes constant volume container 1, weighing equipment electronic balance 2 (Shanghai Zhuojing Electronic Technology Co., Ltd., model: BSM-5200.2), water injection equipment rubber tip dropper 3 (common glass plastic tip dropper commonly used in laboratories ), the drying equipment is a drying box (Sino-foreign joint venture Chongqing Sida Experimental Instrument Co., Ltd., model: CS101-1E) (not shown in the figure).

[0053] Among them, the structural diagram of the constant volume container 1 (including the constant volume container and the liquid level positioning cover removed from the liquid level positioning cover) is as follows figure 2 As shown in the real pho...

Embodiment 2

[0054] Example 2 Volume displacement method for measuring soil particle density—wet soil method

[0055] For the equipment used, see Example 1.

[0056]The soils used are four kinds of soil materials, which are clay loess collected from Yangling, Shaanxi, silt loam in Beijing, black soil in Jilin and clay red soil in Jiangxi (hereinafter referred to as T1, T2, T3, T4 respectively), in order to test the effect of this method on Measurement accuracy in different soils. T1, T2, T3, and T4 are prefabricated into five design moisture contents: 10%, 15%, 20%, 25%, and 30%. Repeat the measurement 3 to 4 times.

[0057] The determination method is as follows:

[0058] Put the soil sample to be tested into a constant volume container with a volume of V0 and a mass of M0, and record the weight as M1; fill water into the constant volume container with the soil sample to be tested, stop water injection when the liquid level is close to the mouth of the constant volume container, and co...

Embodiment 3

[0068] Example 3 Volume displacement method for measuring soil particle density——dry soil method

[0069] For the equipment used, see Example 1.

[0070] The soils used are four kinds of soil materials, which are clay loess collected from Yangling, Shaanxi, silt loam in Beijing, black soil in Jilin and clay red soil in Jiangxi (hereinafter referred to as T1, T2, T3, T4 respectively), in order to test the effect of this method on Measurement accuracy in different soils. T1, T2, T3, and T4 are prefabricated into five design moisture contents: 10%, 15%, 20%, 25%, and 30%. Repeat the measurement 3 to 4 times.

[0071] The determination method is as follows:

[0072] Put the soil sample to be tested into a constant volume container with a volume of V0 and a mass of M0 for drying, and record the weight as M3; slowly pour water into the constant volume container containing the dried soil, and stop water injection when the liquid level is close to the mouth of the constant volume c...

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Abstract

The invention provides a volume substitution method for measuring soil grain density. A soil grain volume is calculated according to a water injection volume by a volume substitution mode; the soil grain mass can be obtained through drying and weighing, and therefore, the soil grain density can be calculated. The volume substitution method for measuring the soil grain density is implemented by a wet method or a dry method. The invention also provides equipment used in the method. The equipment consists of a constant volume vessel, weighing equipment, water injection equipment and drying equipment, wherein the constant volume vessel is used for containing a soil sample to be measured; the water injection equipment is used for injecting water into the constant volume vessel; the drying equipment is used for drying the soil sample to be measured; the weighing equipment is used for weighing the mass. The method disclosed by the invention can be suitable for measurement of the grain density of soil with any property; the operation process is simple and convenient; the long-term problems of complexity in operation, boundedness in measurement range and the like which exist in a pycnometer method, a floating weighing method, a siphon tube method and the like which are used for measuring the soil grain density are solved.

Description

technical field [0001] The invention relates to the field of soil science, in particular to a volume replacement method and equipment for measuring the density of soil particles. Background technique [0002] Solid particles in the soil have a significant impact on the retention and migration of heat, moisture, and chemical substances in the soil. Soil particle density, also known as soil specific gravity, is the dried mass of soil per unit volume (excluding pores). Its size is related to the mineral structure and chemical composition of the soil. The determination of soil particle density is an important item in conventional physical tests of geotechnical engineering. [0003] At present, the main methods of measuring soil particle density are pycnometer method, float method, siphon cylinder method and so on. The pycnometer method is a routine method of laboratory measurement that is widely used at home and abroad. Although the measurement accuracy is high, it is limited ...

Claims

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Application Information

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IPC IPC(8): G01N9/02
Inventor 雷廷武马玉莹
Owner CHINA AGRI UNIV
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