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Sample making device and making method thereof for unconfined compression test

A compression test and device manufacturing technology, which is applied in the preparation of test samples, measuring devices, sampling, etc., can solve the problems of upper and lower layers, uneven density, uneven sample preparation pressure, etc., to avoid loss of moisture content, High sample removal efficiency and good sample preparation uniformity

Inactive Publication Date: 2019-08-02
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the technical problems existing in the known technology, the present invention provides a sample making device and a making method for unconfined compression tests. Uniformity, upper and lower layers of the sample and uneven density can greatly improve the yield, uniformity and sample preparation efficiency of the sample. At the same time, the scope of application is wider, and it can be realized in unsaturated soil, polluted soil and concrete. and other applications

Method used

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  • Sample making device and making method thereof for unconfined compression test
  • Sample making device and making method thereof for unconfined compression test

Examples

Experimental program
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Effect test

Embodiment 1

[0048] a. Material mixing: Store the air-dried and sieved silt soil, powdered curing agent lime and water in storage tank 1, powder storage tank 2 and liquid storage tank 3 respectively, and mix according to the preset curing agent. 15% water content, 30% water content and 1200g mixed usage, the flow rate and time of flow valve A4, flow valve B5 and flow valve C6 are simultaneously adjusted by collective controller 17, so that silt, lime and water pass through discharge pipe 7 , The powder outlet pipe 8 and the liquid outlet pipe 9 flow into the homogenizing device 11, the total mixture of pre-stirring is about 1500g, start the stirring blade 12 to make each component evenly mixed,

[0049] b. Mixture weighing: according to the preset sample density 2.0g / cm 3 and sample size (cylindrical sample: 5cm in diameter, 10cm in height), calculate the mixture weight (about 400g) of a single sample, adjust the flow size and time of the control valve 14 by the collective controller 17, a...

Embodiment 2

[0054] a. Material mixing: Store the sieved polluted soil, powdered cement and water into the material storage tank 1, powder storage tank 2 and liquid storage tank 3 respectively, according to the preset curing agent dosage of 20% , moisture content 30% and mixed consumption 5400g, adjust the flow rate and the time of flow valve A4, flow valve B5 and flow valve C6 simultaneously by collective controller 17, make silt soil, lime and water pass through discharge pipe 7, powder discharge respectively The pipe 8 and the liquid outlet pipe 9 flow into the homogenizing device 11, and the total pre-stirred mixture is about 6000g, and the stirring blade 12 is started to mix the components evenly.

[0055] b. Mixture weighing: according to the preset sample density 1.8g / cm 3 and sample size (cube sample: side length 10cm), calculate the mixture weight (about 1800g) of a single sample, adjust the flow size and time of the control valve 14 by the collective controller 17, weigh the requ...

Embodiment 3

[0060] a. Material mixing: Store the sieved sand, powdered cement and water in the material storage tank 1, powder storage tank 2 and liquid storage tank 3 respectively, and mix according to the preset water-cement ratio of 0.8 and The consumption is 15000g, and the flow rate and time of flow valve A4, flow valve B5 and flow valve C6 are simultaneously adjusted through the collective controller 17, so that the silt, lime and water pass through the discharge pipe 7, the powder discharge pipe 8 and the liquid discharge pipe 9 respectively Flow into the homogenizing device 11, the pre-stirred total mixture is about 15000g, start the stirring blade 12 to make each component evenly mixed,

[0061] b. Mixture weighing: according to the preset sample density 2.5g / cm 3 And sample size (cuboid sample: section side length 10cm, height 20cm), calculate the mixture weight (about 5000g) of single sample, adjust the flow size and time of control valve 14 by collective controller 17, weigh s...

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Abstract

The invention, which belongs to the sample preparation device and a preparation method thereof for civil engineering materials, discloses a sample making device and making method thereof for an unconfined compression test. The sample making device mainly comprises a storage device, a uniform mixing device, a metering device, a sample pressing device and an automatic control device and the like. The device is simple and is convenient to operate; making of samples with different sizes is realized easily and rapidly; and the repeatability is high. Besides, the method includes steps of uniform material mixing, mixed material weighing, assembling of a pressing device, sample compressing, and sample taking out and the like. The made sample has high uniformity; the moisture content and the dry density of the sample can be accurately controlled; accurate compression is realized by one-step hydraulic control; problems that the making pressure is not uniform and the upper-lower layering and density of the sample are not uniform are solved; the yield, uniformity and making efficiency of the sample can be improved to the great extent; and the application range is wide. The making device and making method can be applied to unsaturated soil, contaminated soil and concrete and the like.

Description

technical field [0001] The invention discloses a sample making device and a making method for an unconfined compression test, belonging to the class of sample making devices and methods for civil engineering materials. Background technique [0002] In civil engineering fields such as construction engineering, water conservancy engineering, traffic engineering and geotechnical engineering, the unconfined compressive strength and permeability indexes of samples are important components in engineering design and research. In the field of geotechnical engineering, when the weak soil or polluted soil has been improved or treated by certain means, it is often necessary to test the engineering properties of the improved solidified soil such as strength, failure characteristics and permeability through unconfined compression tests and penetration tests. Provide reliable basis for foundation treatment design and analysis calculation. The unconfined compressive test is a special tria...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 蔡光华王中赵志峰杜广印邵光辉辛文青薄冠中
Owner NANJING FORESTRY UNIV
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