An apparatus for detecting carbonation depth of artificial aggregate surface

Abstract

The utility model discloses a kind of artificial aggregate surface carbonization depth detection devices, belong to carbonization depth detection technical field.The utility model includes detection sample forming unit and carbonization depth detection unit, detection sample forming unit is used to carry out compression molding processing to artificial aggregate raw material, to obtain detection sample of different specifications;The carbonization depth detection unit includes transparent test sealed box, the inner cavity of this transparent test sealed box is divided into multiple test sealed warehouses corresponding with the sample forming bin on the test piece forming mold, and the top of transparent test sealed box is equipped with reagent spraying hole for injection or spraying detection reagent corresponding with multiple test sealed warehouses respectively.The detection device of the utility model is convenient for detecting the carbonization depth of detection sample surface, without damage detection, thereby being conducive to providing effective guidance and support for the optimization of carbonization maintenance process in actual production.

Description

Technical Field

[0001] This utility model belongs to the field of carbonization depth detection technology, and more specifically, relates to a device for detecting the carbonization depth of artificial aggregate surface. Background Technology

[0002] In the field of tailings-to-recycled aggregate production, carbonation is of great significance for improving the performance of artificial aggregates. Carbonation refers to the chemical reaction between calcium hydroxide, a product of hydration, and carbon dioxide in the air, to form calcium carbonate. The chemical reaction equation is: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O. From a microscopic perspective, the molar volume of calcium carbonate (36.9 cm³) is... 3 The volume of the molar volume ( / mol) is slightly larger than that of calcium hydroxide (33.1 cm³). 3 This subtle difference (per mol) allows the calcium carbonate produced after the reaction to fill the pores inside the structure, resulting in a denser structure and significantly improved strength and hardness. Simultaneously, the generated calcium carbonate deposits in the capillaries and microcracks of the artificial aggregate, drastically reducing porosity, effectively improving structural density, and lowering water absorption.

[0003] Applying this carbonization method in the process of preparing recycled aggregate from tailings can form a dense protective layer on the surface of the artificial aggregate, which not only enhances its strength and hardness but also reduces its water absorption. Furthermore, by collecting carbon dioxide generated in industrial production and applying it to the carbonization curing process, a large amount of carbon dioxide can be effectively solidified, significantly reducing carbon emissions and powerfully promoting the development of green environmental protection. However, accurately controlling the carbonization depth is crucial in the carbonization curing process, as it directly affects the final performance and quality stability of the artificial aggregate.

[0004] Currently, the commonly used method for detecting carbonization depth is the phenolphthalein solution chemical indicator method. Phenolphthalein is an acid-base indicator, appearing red in alkaline environments and colorless in acidic environments. Since uncarbonized hydration products are alkaline, while carbonized hydration products react with calcium hydroxide and carbon dioxide to form calcium carbonate, reducing alkalinity, the carbonization depth can be determined by the color change when phenolphthalein solution is sprayed onto the surface of the artificial aggregate. The pink area represents the uncarbonized portion, and the colorless area represents the carbonized portion. However, the method of using phenolphthalein solution to detect carbonization depth requires destructive testing. When applied to the carbonization-reinforced surface of artificial aggregate prepared from tailings, the small volume of recycled artificial aggregate from tailings leads to complex testing procedures and inaccurate results. This makes it difficult to provide rapid and accurate data support for the carbonization curing process, resulting in a lack of timeliness in process control and failing to meet the high-quality requirements of industrial-scale production for recycled artificial aggregate prepared from tailings. Utility Model Content

[0005] To address the issue that existing technologies using phenolphthalein solution chemical indication to detect the carbonation depth of recycled artificial aggregates prepared from tailings typically require destructive testing, resulting in a relatively complex testing process, this invention provides a device for detecting the surface carbonation depth of artificial aggregates. This device facilitates the detection of the surface carbonation depth of recycled artificial aggregates without the need for destructive testing, thereby providing effective guidance and support for optimizing the carbonation curing process.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: This utility model provides a device for detecting the carbonization depth of artificial aggregate surface, comprising: A test specimen forming unit is used to compress and form artificial aggregate raw materials to obtain test specimens. The test specimen forming mold has multiple specimen forming chambers of different depths to form test specimens of different specifications. A carbonization depth detection unit, the carbonization depth detection unit includes a transparent test sealing box, the inner cavity of which is divided into multiple test sealing chambers corresponding to the sample forming chambers on the sample forming mold; When carbonizing the test sample and detecting the carbonization depth, the transparent test sealing box is covered outside the sample forming mold. The top of the transparent test sealing box is provided with reagent spraying holes corresponding to multiple test sealing chambers for injecting or spraying test reagents. The reagent spraying holes (904) can be opened or closed.

[0007] According to any of the artificial aggregate surface carbonization depth detection devices of this utility model, the specimen molding mold includes a mold frame and a base plate. The base plate is detachably installed at the bottom of the mold frame, thereby enclosing and dividing the specimen into multiple specimen molding chambers of different depths through the mold frame and the base plate. When the specimen is subjected to carbonization treatment, the base plate is removed so that the specimen surface corresponding to the base plate can be exposed to the carbon dioxide environment. Specifically, there are no restrictions on the detachable connection structure between the mold frame and the base plate; existing detachable structures, such as snap-fit ​​connections, can be directly used, and therefore will not be elaborated here.

[0008] According to any of the artificial aggregate surface carbonization depth detection devices of this utility model, the transparent test sealing box is made of transparent acrylic sheet.

[0009] Furthermore, in order to effectively ensure the sealing effect of the transparent test sealing box during carbonization treatment and to prevent carbon dioxide from penetrating into the sealing box through gaps and causing carbonization reaction on the back of the test specimen, the circumferential gap between the transparent test sealing box and the test specimen molding mold is sealed after the transparent test sealing box is placed outside the test specimen molding mold. Vaseline is preferably used for sealing.

[0010] According to any artificial aggregate surface carbonization depth detection device of this utility model, the number of sample forming chambers on the specimen forming mold and the number of test sealing chambers on the transparent test sealing box are both three. The three sample forming chambers are used to form test samples with thicknesses of 1.5 mm, 1 mm and 0.5 mm respectively.

[0011] According to any of the artificial aggregate surface carbonization depth detection devices of this utility model, the test sample forming unit includes: The base has four fixed rods that are vertically arranged at parallel intervals along the vertices of a rectangle. The pressure plate is fixedly installed on four fixed rods and is perpendicular to the four fixed rods; A movable pressure plate, which can slide up and down on four fixed rods, is used to place the specimen molding die and is arranged parallel to and opposite to the fixed pressure plate; and The driving mechanism is used to drive the movable pressure plate to move up and down together with the specimen molding die, thereby pressing and molding the test specimen.

[0012] According to any artificial aggregate surface carbonization depth detection device of the present invention, the fixed pressure plate is provided with a molding auxiliary model, and the molding auxiliary model is provided with multiple molding blocks of different thicknesses corresponding to multiple sample molding chambers on the specimen molding mold.

[0013] According to any artificial aggregate surface carbonization depth detection device of this utility model, the driving mechanism includes a drive motor and a lifting screw. The drive motor is fixedly installed on the base, and its output end is driven and connected to the movable pressure plate through the lifting screw.

[0014] According to any of the artificial aggregate surface carbonization depth detection devices of this utility model, the base is equipped with a controller, and the drive motor is connected to the controller for control.

[0015] According to any of the artificial aggregate surface carbonization depth detection devices of this utility model, the device includes a reagent spray nozzle, which sprays test reagent into a transparent test sealed box. The reagent spray nozzle is connected to the test reagent bottle through a pipe, and a flow meter is provided on the reagent spray nozzle.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects: (1) This utility model provides a device for detecting the carbonization depth of artificial aggregate surface. By designing the specimen molding mold to contain multiple specimen molding chambers of different depths, multiple test specimens of different specifications can be formed at the same time. After pressing and molding, a transparent test sealing box is placed outside the specimen molding mold and placed together in the carbonization chamber to carbonize the test specimens. After carbonization for a certain period of time, the entire device is taken out and test reagents are sprayed onto the test specimens in each test sealing chamber through the reagent spraying hole. According to the color change of test specimens of different specifications, the carbonization depth can be directly detected and judged, thereby reflecting the carbonization status of aggregate products in actual production. The detection method is simple to operate. Compared with the prior art, there is no need to detect the damage of the aggregate, and the detection accuracy can be effectively guaranteed.

[0017] (2) This utility model uses a test sample forming unit to form a test sample with the same raw material composition and specifications as in actual production, and then carbonizes the test sample together with the artificial aggregate in actual production. The carbonization depth of the formed test sample is semi-quantitatively tested, so as to truly reflect the carbonization status of the artificial aggregate in actual production, thereby facilitating the adjustment of the actual carbonization process, such as extending the carbonization time or increasing the carbon dioxide concentration.

[0018] (3) When carbonizing the test sample, the present invention directly covers the outside of the test mold with a transparent test sealing box and seals it with Vaseline. Therefore, in a high-concentration carbon dioxide environment, it can ensure that the five sides of the test material are completely sealed and do not come into contact with carbon dioxide. This can prevent carbon dioxide from penetrating the sealing box through the pores and causing carbonization reaction on the back of the test sample, thus affecting the test results. Attached Figure Description

[0019] The dimensions and scales in the accompanying drawings do not represent the actual dimensions and scales of the product. The drawings are for illustrative purposes only, and some non-essential elements or features have been omitted for clarity.

[0020] Figure 1 This is a schematic diagram of the structure of the test sample forming unit according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the carbonization depth detection unit according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the carbonization depth detection unit from another perspective in an embodiment of this utility model.

[0021] In the attached image: 1. Base; 2. Drive motor; 3. Lifting screw; 4. Fixed pressure plate; 5. Fixed rod; 6. Movable pressure plate; 7. Controller; 8. Molding auxiliary model; 9. Transparent test sealing box; 901. First test sealing chamber; 902. Second test sealing chamber; 903. Third test sealing chamber; 904. Reagent spray hole; 10. Specimen molding mold; 1001. First sample forming chamber; 1002. Second sample forming chamber; 1003. Third sample forming chamber. Detailed Implementation

[0022] To further understand the present invention, a detailed description will be provided below with reference to the accompanying drawings and embodiments. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this disclosure. In the following detailed description, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of this disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be implemented without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of this disclosure.

[0023] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0024] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0025] Furthermore, the terms "comprising," "including," etc., used in this application indicate the presence of the stated features, steps, operations, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components. The terms "installed," "set up," "equipped with," "connected," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] Combination Figures 1-3 As shown, this embodiment provides a device for detecting the carbonization depth of artificial aggregate surfaces, including: The test specimen forming unit is used to compress and form artificial aggregate raw materials to obtain test specimens. Its specimen forming mold 10 is equipped with multiple specimen forming chambers of different depths to form test specimens of different specifications. A carbonization depth detection unit, the carbonization depth detection unit includes a transparent test sealing box 9, the inner cavity of which is divided into multiple test sealing chambers corresponding to the sample forming chamber on the sample forming mold 10; During the carbonization treatment of the test sample and the carbonization depth detection, the transparent test sealing box 9 is placed over the outside of the specimen molding mold 10. The top of the transparent test sealing box 9 is provided with reagent spraying holes 904, corresponding to multiple test sealing chambers, for injecting or spraying test reagents. The reagent spraying holes 904 can be opened or closed to simultaneously meet the sealing requirements during carbonization treatment and the requirement for spraying test reagents through the reagent spraying holes 904 during carbonization depth detection. For example, a plug corresponding to the reagent spraying hole 904 can be used to open and close the spraying hole.

[0027] In the carbonization curing process of preparing recycled artificial aggregates from tailings and other raw materials, accurately controlling the thickness of the carbonized layer is a crucial step. Currently, due to the lack of effective detection methods, it is difficult to accurately determine the thickness of the carbonized layer. This makes it impossible to effectively control the carbon dioxide concentration in the carbonization process, and the carbonization rate is also difficult to adjust reasonably. Consequently, it affects the efficient and stable operation of the carbonization curing process, resulting in inconsistent quality of recycled artificial aggregates prepared from tailings, low production efficiency, and increased production costs.

[0028] Based on the above, this embodiment provides a device for detecting the carbonization depth of artificial aggregates. This device facilitates the semi-quantitative detection of the carbonization depth of artificial aggregates under specific carbonization conditions (specific carbonization time and carbon dioxide concentration). The detection process is relatively simple, which is conducive to adjusting the carbonization curing process conditions, thereby ensuring the quality and production efficiency of recycled aggregates prepared from tailings.

[0029] Specifically, in this embodiment, test samples of different thicknesses with the same raw material composition as those in actual production are first pressed and molded by the test sample molding unit. Then, the test sample molding mold 10 is removed, and the transparent test sealing box 9 is placed over the outside of the mold. Subsequently, the test sample and the aggregate products in actual production are subjected to carbonization curing treatment under the same conditions. When the set carbonization time is reached, the test sample is taken out, and the test reagent (phenolphthalein reagent) is sprayed onto the test surface of the aggregate test sample in multiple test sealing chambers through the reagent spraying hole 904. The color change of the test surface of the test sample of different specifications is carefully observed. According to the characteristics of phenolphthalein reagent, pink indicates no carbonization and colorless indicates carbonization, so the carbonization depth under specific carbonization treatment conditions can be determined.

[0030] To facilitate carbonization and protect thinner samples, the specimen molding mold in this embodiment is preferably composed of a mold frame and a base plate. The base plate is detachably installed at the bottom of the mold frame, thereby enclosing and dividing the sample into multiple sample forming chambers of different depths. When carbonization of the test sample is required, the base plate is removed so that the sample surface corresponding to the base plate can be exposed to the carbon dioxide environment, while other surfaces are sealed by the transparent test sealing box 9 to isolate carbon dioxide.

[0031] In a preferred embodiment, the transparent test sealing box 9 is made of transparent acrylic sheet, which facilitates observation and judgment during carbonization layer depth testing while ensuring its structural stability and strength. Furthermore, after the transparent test sealing box 9 is placed over the specimen molding mold 10, the circumferential gap between the sealing box and the mold is sealed with petroleum jelly (i.e., a sealing layer is formed) to prevent carbon dioxide from penetrating the sealing box through the pores during subsequent carbonization treatment, thus avoiding carbonization on the back (surface to be tested) of the test specimen.

[0032] In some embodiments, the number of sample forming chambers on the specimen forming mold 10 and the number of test sealing chambers on the transparent test sealing box 9 are both three. The three sample forming chambers (first sample forming chamber 1001, second sample forming chamber 1002 and third sample forming chamber 1003) are used to form test samples with thicknesses of 1.5 mm, 1 mm and 0.5 mm, respectively. The depths of the three test sealing chambers (first test sealing chamber 901, second test sealing chamber 902 and third test sealing chamber 903) correspond to the depths of the three sample forming chambers.

[0033] It should be noted that there are no special requirements or limitations on the specific structure of the test sample forming unit in this application, as long as the forming process of the test sample can be achieved.

[0034] As one implementation method, the test sample forming unit in this embodiment uses a press, that is, the test sample is prepared by a pressing and forming process, combined with... Figure 1 It includes a base 1, on which four fixed rods 5 are vertically arranged at intervals along the vertices of a rectangle. Two pressure plates are connected between the four fixed rods and arranged in parallel. The fixed pressure plate 4 is fixedly installed on the four fixed rods 5 and has a molding auxiliary model 8 on it. The molding auxiliary model 8 has multiple molding blocks of different thicknesses corresponding to multiple sample molding chambers on the specimen molding mold 10. The movable pressure plate 6 can be slidably installed on the four fixed rods 5 and is used to place the specimen molding mold 10.

[0035] The drive mechanism of this test specimen forming unit is used to drive the movable pressure plate 6 to move up and down together with the specimen forming mold 10. Through the cooperation of multiple forming blocks of different thicknesses and multiple specimen forming chambers of different depths, various test specimens of different specifications can be pressed and formed. Specifically, in this embodiment, the movable pressure plate 6 is located below the fixed pressure plate 4. The drive mechanism includes a drive motor 2 and a lifting screw 3. The drive motor 2 is fixedly installed on the base 1, and its output end is connected to the movable pressure plate 6 through the lifting screw 3.

[0036] Furthermore, the base 1 is equipped with a controller 7, and the drive motor 2 is connected to the controller 7 for control, so as to effectively control the pressure and speed during the pressing and molding process, so as to ensure that the sample surface is uniform and flat, providing a good foundation for subsequent testing.

[0037] Furthermore, the device includes a reagent spray nozzle (not shown in the figure) that sprays test reagents into the transparent test sealed box 9. The reagent spray nozzle is connected to the test reagent bottle through a pipe, and a flow meter is provided on the reagent spray nozzle.

[0038] After the test sample is pressed and molded, a transparent test sealing box is placed outside the test piece molding mold, and the bottom plate of the test piece molding mold 10 is removed. Then, the sample is placed in the carbonization chamber for carbonization treatment (only the surface corresponding to the bottom plate is in contact with carbon dioxide). After a certain carbonization time, the entire device is removed, and test reagent is sprayed onto the test surface of the test sample in each test sealing chamber through the reagent spraying holes. The carbonization depth can be visually judged based on the color change of the test surface of the test sample of different specifications. For example, under specific carbonization conditions, if the test surface of the 0.5mm test sample is carbonized, while the test surface of the 1mm test sample is not carbonized, it indicates that the carbonization layer depth under the carbonization conditions is between 0.5mm and 1mm. If this does not meet production requirements, the carbonization layer depth can be increased by increasing the carbon dioxide concentration or extending the carbonization time.

[0039] As a further optimization method, during testing, the color change of the inner surface of the sample under test can be clearly observed through external lighting on one side of the box, so as to more accurately determine the degree of carbonization.

Claims

1. A device for detecting the carbonization depth of artificial aggregate surface, characterized in that, include: The test specimen forming unit is used to press and form artificial aggregate raw materials to obtain test specimens. Its specimen forming mold (10) is equipped with multiple specimen forming chambers of different depths to form test specimens of different specifications. The carbonization depth detection unit includes a transparent test sealing box (9), the inner cavity of which is divided into multiple test sealing chambers corresponding to the sample forming chamber on the sample forming mold (10); When carbonizing the test sample and detecting the carbonization depth, the transparent test sealing box (9) is covered outside the test piece forming mold (10). The top of the transparent test sealing box (9) is provided with reagent spraying holes (904) corresponding to multiple test sealing chambers for injecting or spraying test reagents. The reagent spraying holes (904) can be opened or closed.

2. The artificial aggregate surface carbonization depth detection device according to claim 1, characterized in that, The specimen forming mold (10) includes a mold frame and a base plate. The base plate is detachably installed at the bottom of the mold frame, thereby forming multiple specimen forming chambers of different depths by the mold frame and the base plate together.

3. The apparatus for detecting a carbonation depth of an artificial aggregate surface according to claim 1, characterized by, The transparent test sealing box (9) is made of transparent acrylic sheet.

4. The artificial aggregate surface carbonization depth detection device according to claim 1, characterized in that, The number of sample forming chambers on the sample forming mold (10) and the number of test sealing chambers on the transparent test sealing box (9) are both three. The three sample forming chambers are used to form test samples with thicknesses of 1.5 mm, 1 mm and 0.5 mm respectively.

5. The device for detecting the surface carbonization depth of artificial aggregates according to any one of claims 1-4, characterized in that, The test sample forming unit includes: The base (1) has four fixed rods (5) arranged vertically on it, which are parallel to each other along the vertices of the rectangle. The pressure plate (4) is fixedly installed on the four fixed rods (5) and is perpendicular to the four fixed rods (5); The movable pressure plate (6) can be slidably mounted on four fixed rods (5) for placing the specimen molding mold (10), and is arranged parallel to and opposite to the fixed pressure plate (4); and The driving mechanism is used to drive the movable pressure plate (6) to move up and down together with the specimen molding die (10) to press and mold the test specimen.

6. The artificial aggregate surface carbonization depth detection device according to claim 5, characterized in that, The fixed pressure plate (4) is provided with a molding auxiliary model (8), and the molding auxiliary model (8) is provided with multiple molding blocks of different thicknesses corresponding to multiple sample molding chambers on the sample molding mold (10).

7. The artificial aggregate surface carbonization depth detection device according to claim 5, characterized in that, The drive mechanism includes a drive motor (2) and a lifting screw (3). The drive motor (2) is fixedly installed on the base (1), and its output end is connected to the movable pressure plate (6) through the lifting screw (3).

8. The artificial aggregate surface carbonization depth detection device according to claim 7, characterized in that, The base (1) is equipped with a controller (7), and the drive motor (2) is connected to the controller (7) for control.

9. The device for detecting the surface carbonization depth of artificial aggregates according to any one of claims 1-4, characterized in that, The device includes a reagent spray nozzle that sprays test reagents into a transparent test sealed box (9). The reagent spray nozzle is connected to the test reagent bottle through a pipe and is equipped with a flow meter.

Images