Mixing test device for fresh concrete and carbon dioxide

Abstract

The utility model discloses a mixing test device for fresh concrete and carbon dioxide. The mixing test device comprises a stirring device, a gas injection system and a vacuumizing system, wherein the gas injection system is connected with the stirring device and used for providing carbon dioxide into the stirring device, and the vacuumizing system is connected with the stirring device. According to the mixing test device for the freshly mixed concrete and the carbon dioxide, the carbon dioxide can fully participate in the curing process of the concrete through stirring, and the mixing effect of the freshly mixed concrete and the carbon dioxide can be effectively tested.

Description

Technical Field

[0001] The utility model belongs to the technical field of mixing equipment. Specifically, the utility model relates to a mixing test device for fresh concrete and carbon dioxide. Background Art

[0002] Concrete is the most widely used building material in the world. Concrete is prepared by mixing water, fine aggregates (such as sand), coarse aggregates (such as gravel) and cement. A large amount of carbon dioxide is generated during the production of cement. Carbon dioxide emissions from the cement and concrete industries account for 8% of global greenhouse gas emissions.

[0003] Currently, in the process of preparing concrete, there are mainly two methods for carbon dioxide sequestration: one is carbonation treatment of hardened concrete, that is, placing solid concrete blocks in a container and injecting carbon dioxide gas under high pressure; the other is carbonation of fresh concrete, that is, injecting carbon dioxide gas into the mixture during the production of concrete.

[0004] Chinese Patent with Application No. 202310366417.9 discloses a method for preparing aerated concrete by carbon dioxide foaming and concrete products. The preparation method is as follows: 1) adding water and a modifier to the aerated concrete raw materials and stirring and mixing to form a slurry; 2) introducing carbon dioxide into the slurry as a foaming gas, mixing carbon dioxide with the slurry, and pre-curing to obtain an aerated concrete blank; 3) subjecting the aerated concrete blank to autoclave curing to obtain autoclaved aerated concrete. Introducing carbon dioxide as a foaming gas enables carbon dioxide to be uniformly distributed in the slurry in the form of pores, comprehensively and uniformly carbonating and curing the aerated concrete slurry as a whole, improving the carbonation degree of the slurry and the strength of the blank, shortening the static stopping time, reducing the autoclave curing pressure by carbon dioxide curing, shortening the constant pressure time, and greatly improving the production efficiency and reducing the production energy consumption when reaching blanks with the same strength. The low thermal conductivity, negative pressure or vacuum degree of carbon dioxide and the thermal stability of the carbonation products improve the heat insulation and high-temperature resistance performance of the concrete products.

[0005] It is desired to provide a mixing test device for fresh concrete and carbon dioxide, especially a device for testing the mixing effect of fresh concrete and carbon dioxide. Summary of the Utility Model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a mixing test device for fresh concrete and carbon dioxide, aiming to effectively test the mixing effect of fresh concrete and carbon dioxide.

[0007] To achieve the above object, the technical solution adopted by the present utility model is as follows: A mixing test device for fresh concrete and carbon dioxide, comprising a stirring device, a gas injection system connected to the stirring device and used to supply carbon dioxide into the stirring device, and a vacuum pumping system connected to the stirring device.

[0008] The stirring device includes a mixing pan and a lid arranged on the mixing pan.

[0009] The gas injection system includes a gas cylinder filled with carbon dioxide, and the gas cylinder is connected to the lid.

[0010] The vacuum pumping system includes a vacuum pump, and the vacuum pump is connected to the lid.

[0011] A pressure gauge is arranged on the lid.

[0012] A temperature sensor is arranged on the lid.

[0013] The mixing test device for fresh concrete and carbon dioxide of the present utility model can enable carbon dioxide to participate more fully in the concrete curing process through stirring, and can effectively test the mixing effect of fresh concrete and carbon dioxide; it can provide an effective experimental means for achieving carbon emission reduction in the cement industry; it can improve the stability and reliability of the test process and reduce the test cost; it can provide strong support for the experimental research on the mixing and stirring technology of fresh concrete and carbon dioxide, and promote the development of the construction industry towards high performance and environmental protection. Description of the Drawings

[0014] This specification includes the following drawings, and the shown contents are respectively:

[0015] Figure 1 It is a schematic structural diagram of the mixing test device for fresh concrete and carbon dioxide of the present utility model;

[0016] The marks in the figure are: 1, mixing pan; 2, lid; 3, sealing ring; 4, support; 5, buckle; 6, temperature sensor; 7, air pipe; 8, gas cylinder; 9, pressure reducing valve; 10, display screen; 11, vacuum pump; 12, motor. Detailed Embodiments

[0017] The following further details the specific embodiments of the present utility model by describing the embodiments with reference to the drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present utility model, and contribute to its implementation.

[0018] As Figure 1As shown in the figure, the utility model provides a mixing test device for fresh concrete and carbon dioxide, which includes a stirring device, a gas injection system connected to the stirring device and used to supply carbon dioxide into the stirring device, and a vacuum pumping system connected to the stirring device. The stirring device is used to accommodate fresh concrete and carbon dioxide, and stir the fresh concrete and carbon dioxide inside, so that the carbon dioxide injected into the stirring device by the gas injection system can more fully participate in the concrete curing process.

[0019] Specifically, as Figure 1 shown, the stirring device includes a mixing pot 1 and a pot lid 2 arranged on the mixing pot 1. The mixing pot 1 has a hollow structure inside, and the mixing pot 1 is used to accommodate fresh concrete and carbon dioxide. The pot lid 2 is used to seal the top opening of the mixing pot 1. A stirring shaft driven by a motor is arranged inside the mixing pot 1. The motor drives the stirring shaft to rotate, and the stirring shaft stirs the fresh concrete and carbon dioxide inside the mixing pot 1, so that carbon dioxide can more fully participate in the concrete curing process. A sealing treatment is adopted between the stirring shaft and the mixing pot 1 to prevent gas leakage during the rotation of the stirring shaft. The mixing pot 1 and the pot lid 2 are connected in the form of a buckle 5 and sealed with a sealing gasket.

[0020] As Figure 1 shown, the gas injection system includes a gas cylinder 8 filled with carbon dioxide. The gas outlet of the gas cylinder 8 is connected to the inlet of a pressure reducing valve 9, and the outlet of the pressure reducing valve 9 is connected to the pot lid 2 through a gas pipe 7. Carbon dioxide is injected into the mixing pot 1 by the gas cylinder 8, and the pressure reducing valve 9 controls the pressure.

[0021] As Figure 1 shown, the vacuum pumping system includes a vacuum pump 11 connected to the pot lid 2. Above the pot lid 2, it is connected to the vacuum pump 11 through a pipeline. The vacuum pump 11 is used to pump out the air inside the mixing pot 1 during the experiment.

[0022] As Figure 1 shown, a pressure gauge and a temperature sensor 6 are arranged on the pot lid 2. The pressure gauge is used to detect the pressure of the atmosphere inside the mixing pot 1, and the temperature sensor 6 is used to detect the temperature of the atmosphere inside the mixing pot 1. Flow and pressure control technologies are adopted to ensure the uniform incorporation of carbon dioxide into fresh concrete.

[0023] The operation and management of the entire device are responsible by the control system, including the operation of the mixing pot 1, time, vacuum pumping, carbon dioxide injection, etc., to ensure the stability and reliability of the test process.

[0024] In terms of the operation method, the operator only needs to pour the concrete raw materials into the mixing pot 1. After setting the test parameters through the control system, the device can automatically complete the mixing and stirring process of fresh concrete and carbon dioxide.

[0025] The above has made an exemplary description of the present utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. Mixing test device for fresh concrete and carbon dioxide, characterized in that: It includes a stirring device, a gas injection system connected to the stirring device and used to supply carbon dioxide into the stirring device, and a vacuum pumping system connected to the stirring device; The stirring device includes a stirring pot and a pot cover arranged on the stirring pot; The gas injection system includes a gas cylinder filled with carbon dioxide; the gas outlet of the gas cylinder is connected to the inlet of a pressure reducing valve, and the outlet of the pressure reducing valve is connected to the pot cover through a gas pipe, and carbon dioxide is injected into the stirring pot by the gas cylinder, and the pressure is controlled by the pressure reducing valve; The vacuum pumping system includes a vacuum pump connected to the pot cover; above the pot cover is connected to the vacuum pump by a pipeline, and the vacuum pump is used to pump out the air in the stirring pot during the experiment; A pressure gauge and a temperature sensor are arranged on the pot cover. The pressure gauge is used to detect the pressure of the atmosphere in the stirring pot, and the temperature sensor is used to detect the temperature of the atmosphere in the stirring pot.

Images