Method for improving unconfined compressive strength of soil by utilizing graphene

A technology of compressive strength and graphene, which is applied in the direction of applying stable tension/pressure to test material strength, strength characteristics, and preparation of test samples, can solve problems in the initial stage, and achieve improved soil particle gradation, The effect of strong adsorption activity and large surface energy

Inactive Publication Date: 2018-06-22
HOHAI UNIV
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Problems solved by technology

However, the research on graphene-modified soil is still in its infancy.

Method used

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  • Method for improving unconfined compressive strength of soil by utilizing graphene
  • Method for improving unconfined compressive strength of soil by utilizing graphene
  • Method for improving unconfined compressive strength of soil by utilizing graphene

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Embodiment Construction

[0021] Industrial-grade multilayer graphene is selected, and its physical and mechanical properties are shown in Table 1; the soil used in the experiment is clay, the liquid and plastic limits are 32.4% and 13.6%, respectively, and the maximum dry density is 1.63g cm -3 , the optimum moisture content is 18.5%.

[0022] Table 1 Physical properties of graphene

[0023]

[0024] The preparation of the sample is carried out in accordance with the "Soil Engineering Test Regulations" SL237-1999. After the clay has been air-dried, crushed, sieved and other preparatory procedures, the air-dried moisture content is measured to be 3.2%; the dry soil and water are used to configure the moisture content in the laboratory. For the soil sample with the optimal moisture content of 18.5%, the dosage of graphene was 0%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5% and 4% of the dry soil weight, respectively. The relevant parameters are shown in Table 2, in which 3 parallel samples were prepared for ...

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Abstract

The invention discloses a method for improving unconfined compressive strength of soil by utilizing graphene. The method comprises the following steps: (1) preparing dry soil and water into a soil sample with a set water content; (2) doping the graphene with the mass of 0 to 4 percent of that of the dry soil into the soil sample, and dividing the soil sample into n proportioning groups; (3) preparing m parallel test samples aiming at the modified soil of each group of proportioning by adopting a compacting method; (4) after the test samples are saturated, and immersing for f hours; (5) performing unconfined compressive strength test on the prepared n groups of test samples, and testing the unconfined compressive strength values of the test samples; (6) drawing an unconfined compressive strength relationship curve of graphene content-modified soil samples, and obtaining the doping amount of the graphene when the improvement amplitude of the strength is maximal; (7) drawing stress-straincurves of compressive strength tests of the test samples with different graphene content. Compared with the prior art, the soil is doped with the graphene, so that the structure of the soil body is improved, and the unconfined compressive strength of the soil is improved.

Description

technical field [0001] The invention relates to a method for improving the unconfined compressive strength of soil, in particular to a method for improving the unconfined compressive strength of soil by using graphene. Background technique [0002] With the development of science and technology, the continuous emergence of high-rise and super high-rise buildings has put forward higher requirements for the foundation strength and stability of structures, and the lower strength of natural soil is becoming more and more difficult to meet the requirements of modern engineering for foundation strength. requirements. [0003] As a reinforcement material for soil, graphene has broad application prospects in the fields of energy, electronics, biomedicine, composite materials, and geotechnical engineering. At present, the preparation of graphene has gradually realized industrial mass production. During its production and use, a large amount of waste graphene will inevitably be relea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N3/08
CPCG01N1/28G01N1/286G01N3/08G01N2203/0019
Inventor 高磊任可意余湘娟胡艳杰
Owner HOHAI UNIV
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