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Concrete-high-compaction bentonite composite system behavior simulation test method and device

A kind of simulation test, bentonite technology, applied in the direction of measuring device, using stable tension/pressure test material strength, suspension and porous material analysis, etc., to achieve good sealing effect, convenient detection and low price

Active Publication Date: 2019-01-11
TONGJI UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are few reports on the characteristics of the contact interface between bentonite and concrete under high compaction conditions

Method used

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  • Concrete-high-compaction bentonite composite system behavior simulation test method and device
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  • Concrete-high-compaction bentonite composite system behavior simulation test method and device

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Such as Figure 1 to Figure 3c As shown, the concrete-high compacted bentonite composite system performance simulation test device provided by the present invention includes three parts: concrete / bentonite contact interface Mock-up device, liquid injection control device and measuring device:

[0034] 1) The concrete / bentonite contact interface Mock-up device includes a base 1, a solution chamber 2, a sleeve 3, a concrete sample ring 4, a bentonite sample ring 5, a permeable stone 6, a sealing ring 7, a piston 8, a lower Top cover 9, upper top cover 12. Among them, the base 1, the solution chamber 2, the bentonite sample ring 5, the piston 8, the lower top cover 9, and the upper top cover 12 are made of stainless steel, and the sleeve 3 and the concrete sample ring 4 are made of polytetrafluoroethylene.

[0035]The base 1 is connecte...

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Abstract

The invention belongs to the technical fields of civil engineering (geotechnical) and geological engineering, and discloses a concrete-high-compaction bentonite composite system behavior simulation test method and device. The device mainly comprises a concrete / bentonite contact interface Mock-up device, a liquid injection control device and a measuring device, wherein the concrete / bentonite contact interface Mock-up device is used for ensuring that samples are fully in contact with the concrete under the condition of constant volume, the liquid injection control device is used for simulating the hydration infiltration and expansion changes of bentonite samples under the condition of groundwater infiltration, and the measuring device is connected with a computer through acquisition softwareto monitor in time and automatically save test data. The concrete-high-compaction bentonite composite system behavior simulation test method and device can realize the test research of bentonite permeability, expansibility, evolution of pore water chemical composition, long-term physical property and porosity development when the bentonite is in contact with concrete under the action of simulatedgroundwater solution in a disposal reservoir.

Description

technical field [0001] The invention relates to a performance simulation test method and device of a concrete-high compacted bentonite combined system, belonging to the technical fields of civil engineering (rock and soil) and geological engineering. Background technique [0002] High-level radioactive waste (referred to as "high-level radioactive waste") is a special waste with strong radioactivity, long half-life of nuclides, high toxicity, and high calorific value. In order to permanently and safely isolate it from the biosphere, it is currently accepted internationally that it is sealed in a stable rock formation 500-1000m above the surface by using multiple barrier systems. As the most important engineering barrier to prevent the migration of radionuclides to groundwater, buffer / backfill materials should have key functions such as maintaining the structural stability of the repository, preventing groundwater seepage, retarding nuclide migration, and diffusing nuclear ra...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N15/08
CPCG01N3/12G01N15/0826
Inventor 陈永贵孙曌叶为民贾灵艳陈宝
Owner TONGJI UNIV
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