A Rapid Method for Preparing Samples with Different Water Saturation

A saturation and rapid technology, applied in the field of rock samples and concrete samples, can solve the problems of affecting the mechanical properties of the samples, affecting the accuracy of preparing rock samples, uneven water distribution, etc., shortening the preparation time, and achieving high accuracy of water saturation. and fast, water-saturation-accurate results

Active Publication Date: 2017-12-22
HOHAI UNIV
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  • Claims
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Problems solved by technology

Although this method speeds up the preparation time, the sample can be saturated with water in about 6 hours, and the corresponding relationship between the soaking time and the water saturation of the sample is relatively clear, but the disadvantage of this method is that the distribution of water in the sample is not uniform, Affect the mechanical properties of the sample;
[0006] 3. Conventional chemical-thermodynamic method: Zhou Hui et al. have published a patent "a method for preparing rock test samples with different water content", publication number CN102393320A, which studies the conventional chemical-thermodynamic method for preparing rocks with different water content. Although the method can prepare rock samples with uniform water content distribution, the preparation time is long, usually about 3 months. If the time is too long, the accuracy of rock sample preparation will be affected, and it cannot meet the needs of scientific researchers for preparing samples with different water saturations during experiments.

Method used

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  • A Rapid Method for Preparing Samples with Different Water Saturation
  • A Rapid Method for Preparing Samples with Different Water Saturation
  • A Rapid Method for Preparing Samples with Different Water Saturation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Adjust the humidity of the hygrostat to 42% according to the above steps, and the obtained initial rock sample test data are shown in Table 1:

[0031] Table 1 Test data when the humidity of the humidistat is 42%

[0032]

Embodiment 2

[0034] Dry the corresponding primary rock sample in Example 1 in an oven, adjust the humidity of the hygrostat to 75%, and obtain the secondary rock sample. The test data are shown in Table 2 below:

[0035] Table 2 Secondary test data when the humidity of the hygrostat is 75% after the initial rock sample drying

[0036]

Embodiment 3

[0038] Dry the corresponding secondary rock samples in Example 2 in an oven, adjust the humidity of the hygrostat to 98%, and obtain three rock samples. The test data are as follows in Table 3:

[0039] Table 3 The test data when the humidity of the humidifier is 98% after the second rock sample drying

[0040]

[0041]

[0042] From the test results of Examples 1 to 3, it can be known that the rock samples reached stable quality at 108h and 132h respectively at a humidity of 42%, and their water saturations were 12.486% and 11.839%, with a difference of only 0.647%; The samples reached stable quality at 144h and 156h respectively, and the water saturations were 22.377% and 21.25%, with a difference of only 1.127%. Under 98% humidity, the rock samples reached stable quality at 192h and 168h respectively, and the water saturations were 33.89%, respectively. 34.253%, a difference of only 0.363%. It can be seen that the preparation of samples with different water saturatio...

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Abstract

The invention discloses a method for quickly preparing samples with different water saturations, which belongs to the technical field of rock samples and concrete samples, and comprises the following steps: 1) cutting the samples; 2) putting the cut samples into an oven to obtain a Dry samples; 3) Prepare water saturation samples under negative pressure and constant humidity environment; 4) Prepare samples with different water saturations in sequence according to the test plan. A method for quickly preparing samples with different water saturations in the present invention reduces the air in the pores of the sample under negative pressure, accelerates the penetration of water vapor in the sample, and shortens the preparation time; Control the humidity of the hygrostat to accurately prepare samples with different water saturations. The invention has the advantages of simple operation and high efficiency, and can quickly prepare high-precision samples meeting the research requirements and having uniform moisture distribution.

Description

technical field [0001] The invention belongs to the technical field of rock samples and concrete samples, in particular to a method for quickly preparing samples with different water saturations. Background technique [0002] The influence of water on the mechanical properties of engineering materials such as rocks and concrete is very significant. Therefore, in the research of mechanics, architecture, geology and other fields, the influence of water on samples is often considered. Therefore, how to quickly and accurately prepare water-containing materials with uniform distribution Samples with different water saturations have become a problem that researchers must consider, but so far there is no relatively complete method to prepare samples with different water saturations, and the common problems are long time, low precision, and uneven water distribution And so on. Therefore, there is an urgent need for a relatively complete method to prepare samples with different wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
Inventor 巢志明王环玲徐卫亚冉少鹏滕志强林志南贾朝军丁坚
Owner HOHAI UNIV
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