Device and method for strengthening recycled aggregate by means of CO2

A technology of recycled aggregate and CO2, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. problems, to achieve the effect of improving the treatment effect, increasing the utilization rate of equipment, and reducing the water absorption rate

Active Publication Date: 2017-01-04
FUZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The mechanical strengthening method will cause further damage to the aggregate; the acid cleaning method will introduce acid radical ions, which will reduce the durability of the recycled concrete prepared subsequently; the polymer treatment method can effectively reduce the water absorption of the recycled coarse aggregate, but Limited improvement in strength

Method used

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  • Device and method for strengthening recycled aggregate by means of CO2
  • Device and method for strengthening recycled aggregate by means of CO2
  • Device and method for strengthening recycled aggregate by means of CO2

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Embodiment Construction

[0018] Such as Figure 1~4 As shown, a CO 2 The device for strengthening recycled aggregates includes a reactor 15 with a lid. Inside the reactor 15 is a multi-layered material frame 16. The side of the reactor 15 is provided with an air inlet 2 connected to a carbon dioxide cylinder. Said kettle cover 10 has a pressurization port 7, which is connected with said carbon dioxide cylinder through a booster pump, said still cover 10 is also provided with an exhaust port 3 and a vacuum port 4 connected with a vacuum pump, The device maintains CO 2 The concentration is 100%, and the pressure can be controlled between -0.1MPa and 0.8MPa.

[0019] In this embodiment, the material of the reactor is S30408 ​​stainless steel, the wall thickness of the reactor is not less than 8mm, the thickness of the lid is not less than 60mm, the diameter and height are about 900mm, the total volume is 667L, and the effective volume is 500L.

[0020] In this embodiment, the side of the reaction kett...

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Abstract

The invention relates to a device and method for strengthening recycled aggregate by means of CO2. The device comprises a reaction kettle with a kettle cover, a plurality of layers of stacked material frames are arranged in the reaction kettle, a gas inlet connected with a carbon dioxide steel cylinder is formed in the side of the reaction kettle, a pressurizing opening is formed in the kettle cover and connected with the carbon dioxide steel cylinder through a booster pump, and the kettle cover is further provided with an exhaust port and a vacuum opening connected with a vacuum pump. The device is simple in structure, convenient to install and maintain, convenient to clean and high in universality. By means of reaction of CO2 and recycled aggregate, the recycled aggregate is strengthened, basic properties of the recycled aggregate are improved, the water absorption rate and porosity of the recycled aggregate are reduced, the aperture is reduced, carbonization time is shortened, carbonization depth is increased, the treatment effect is improved, the yield is increased, and the equipment utilization rate is increased.

Description

technical field [0001] The present invention relates to a method using CO 2 A device for strengthening recycled aggregate and a strengthening method thereof. Background technique [0002] Regenerated coarse aggregate is the aggregate with a particle size of 5-31.5 mm after crushing and processing waste concrete. Regenerated coarse aggregate has large porosity, high water absorption, low bulk density, and high crushing index value. Compared with ordinary concrete, the performance of recycled concrete is greatly reduced. Strengthening and pretreatment of recycled coarse aggregate is one of the methods to improve the performance of recycled concrete. [0003] At present, the existing methods of strengthening recycled concrete aggregate at home and abroad include mechanical strengthening method, acid cleaning method, polymer treatment method, and cement mixed with silica fume treatment method. The mechanical strengthening method will cause further damage to the aggregate; the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCC04B18/167Y02W30/91
Inventor 罗素蓉林桂华朱艺婷
Owner FUZHOU UNIV
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