Device for testing long-term color stability of polymer concrete

Abstract

The utility model discloses a kind of color long-acting stability testing devices for polymer concrete, belong to polymer concrete testing device technical field. Including controller, test cavity seat, top cover, test piece unit and long-acting test unit, the test cavity seat inside is provided with test piece clamping slot;The top cover is clamped and fixed in test cavity seat top surface;The test piece unit includes the disc seat of test piece clamping slot clamping, and the disc seat top surface is fixed with test piece body;The long-acting test unit includes compartment, and the compartment is fixed in the top of top cover inside by bolt;The compartment front side is equipped with straight groove;Electric straight line sliding table is fixed in the compartment at straight groove, and the compartment inside is also fixed with box, the utility model is used for the color long-acting stability testing device of polymer concrete, integrates one body to three kinds of aging factors of ultraviolet, temperature and humidity, salt fog and dynamic friction, can satisfy the color long-acting stability test demand of polymer concrete.

Description

Technical Field

[0001] This utility model specifically relates to a device for testing the long-term color stability of polymer concrete, belonging to the technical field of polymer concrete testing devices. Background Technology

[0002] Polymers (such as carboxylated styrene-butadiene polymers) can improve the workability, crack resistance, and durability of concrete, while iron oxide blue pigment provides a stable light blue hue. In recent years, with the increasing demand for green building and decoration, research on colored concrete has gradually deepened. Polymer concrete combines optimized mechanical properties with aesthetics. Polymer-modified concrete improves the performance of traditional concrete by incorporating polymer materials, while iron oxide pigment gives it color functionality. For example, adding an appropriate amount of iron oxide blue during concrete preparation can make the concrete present a lasting light blue color, while the polymer film fills the pores, improving durability. To evaluate the color durability of polymer concrete, it is necessary to test it. Existing testing equipment, such as the colored concrete aging test method disclosed in Chinese Patent Publication No. CN120177340B, improves the simulation realism and accurately evaluates the color durability of colored concrete by constructing an equivalent test cycle throughout the year and executing a cyclic sequence in sequence. However, this structure is cumbersome to control, lacks dynamic friction testing, has a long testing cycle, and requires frequent manual intervention. Utility Model Content

[0003] To address the aforementioned issues, this invention proposes a device for testing the long-term color stability of polymer concrete. This device integrates three aging factors—ultraviolet radiation, temperature and humidity, and salt spray—with dynamic friction, thus meeting the requirements for testing the long-term color stability of polymer concrete.

[0004] This utility model discloses a device for testing the long-term color stability of polymer concrete, including: The controller for overall machine control. A test chamber holder, wherein a specimen slot is provided on the inner side of the test chamber holder; Top cover, which is snapped and fixed to the top surface of the test chamber seat; The specimen unit includes a disk base that engages with a specimen slot, and a specimen body is fixed on the top surface of the disk base; The long-term testing unit includes a compartment, which is bolted to the top inner side of a top cover. A straight groove is formed on the front of the compartment. An electric linear slide is fixed to the compartment at the straight groove. A housing is also fixed inside the compartment, containing a salt spray reservoir and a clean water reservoir. The salt spray reservoir and the clean water reservoir are connected to a pump unit via a switching valve. The pump unit is connected to an atomizing head at the bottom of the compartment. Hot air blowers are fixed to both sides of the atomizing head at the bottom of the compartment. End seats are fixed to both sides of the straight groove at the bottom of the compartment. A narrow-band ultraviolet LED array is fixed to the rear bottom of the compartment. A lifting seat is slidably mounted on the end seat. The top of the lifting seat is fixed to the sliding end of the electric linear slide. Bellows protective covers are fixed to both sides of the top of the lifting seat outside the straight groove. An electric friction roller is fixed to the bottom of the lifting seat. The electric friction roller presses against the top surface of the specimen. An optical axis that slides with the lifting seat is fixed on the end seat.

[0005] During testing, the specimen-bearing tray is first attached to the specimen slot. Before testing, the color of the top surface of the specimen is collected. Then, the controller performs environmental simulation control: the intensity of ultraviolet radiation is controlled by a narrow-band ultraviolet LED array; hot air is provided by a hot air blower; and the switching valve is switched to the clean water storage tank. The pump unit atomizes the clean water through the atomizing head to achieve temperature and humidity control. Next, the switching valve is switched to the salt spray storage tank, and the pump unit sprays salt spray liquid through the atomizing head to simulate the aging process under different climatic conditions. During testing, the electric friction roller driven by the lifting seat is pressed against the top surface of the specimen. The electric friction roller rotates and rubs, and the electric linear slide moves back and forth to form a friction zone on the top surface of the specimen. By acquiring the first set of test colors before testing, the second set of test colors after aging testing, and the third set of test colors after aging testing and rotational friction, the color long-term stability can be evaluated by comparing the color difference of the three sets of test colors.

[0006] Furthermore, the lifting seat includes an outer cylinder and an inner cylinder, with a linear lifting unit fixed between the outer cylinder and the inner cylinder. Guide sleeves are fixed on both the front and rear sides of the linear lifting unit on the outer cylinder, and the guide sleeves are slidably installed with the optical shaft. A pressure transmitter is fixed at the bottom of the inner cylinder. The electric friction roller includes an outer sleeve, with a motor and a roller disposed inside the outer sleeve. The motor and the roller are connected by a transmission component. The bottom of the roller protrudes from the bottom of the outer sleeve, and multiple hanging bolts are embedded in the top of the inner sleeve. The hanging bolts are movably engaged with the bottom of the inner cylinder and screwed with hanging nuts.

[0007] When the lifting platform is in operation, the linear lifting unit drives the inner cylinder to descend linearly along the outer cylinder. The inner cylinder drives the electric friction roller to descend synchronously. When the bottom of the electric friction roller presses against the top surface of the specimen, the inner cylinder continues to descend. The pressure transmitter at the bottom of the inner cylinder presses against the top of the electric friction roller and continues to descend with the inner cylinder until the pressure transmitter detects that the pressure has reached the set value. At this time, the linear lifting unit locks in place. At this time, the electric friction roller works, and the motor drives the roller to rotate continuously. The roller continuously rubs against the specimen. By controlling the pressure value applied to the specimen and the roller speed, the friction force on the specimen can be controlled. The electric linear slide drives the roller to reciprocate, which can form a friction zone on the top surface of the specimen. By comparing the color difference between the friction zone and the surrounding area of ​​the specimen, the long-term stability of the color can be evaluated.

[0008] Furthermore, the linear lifting unit is a hydraulic cylinder or an electric linear screw assembly; the hydraulic cylinder or electric linear screw assembly can realize the linear lifting of the inner cylinder along the outer cylinder.

[0009] Furthermore, the specimen includes a colored concrete sample block made by pouring and curing polymer concrete; the bottom of the colored concrete sample block is fixed by a pad cast with embedded parts, and a screw is fixed to the bottom of the pad, the screw moving through the disc seat and screwed with a nut; when making the specimen, it is first poured into the colored concrete sample block with the embedded parts, and after curing, the pad is pressed onto the disc seat, and the screw and nut are tightened to press the pad and the disc seat together; then the disc seat is snapped into the specimen slot.

[0010] Furthermore, straight grooves are provided on both sides of the top surface of the disc base, and a top block is movably fitted inside the straight groove; a bolt body that abuts against the top block is screwed to the bottom of the straight groove; during operation, the pad and the disc base are pressed together by the cooperation of the nut body and the screw body, and then the bolt body is rotated to push the top block up, so that the top of the top block abuts tightly against the bottom of the colored concrete sample block.

[0011] Furthermore, a rubber seal is fitted around the lower outer side of the colored concrete sample block. The compartment, bellows cover, and rubber seal can seal salt spray, moisture, and ultraviolet rays around the colored concrete sample block, preventing them from entering the tray and compartment. The surfaces exposed to salt spray, moisture, and ultraviolet rays need to be covered with a polytetrafluoroethylene coating to prevent the device from being corroded.

[0012] Furthermore, a multispectral imager is fixed to the top of the compartment. The controller activates the multispectral imager every 24 hours to perform a full-surface scan and generate chromaticity parameters (Lab). The system generates a spatiotemporal distribution map of the color difference ΔE and uploads the collected data to a computer. The computer analyzes the changing trend of the color difference ΔE in real time through edge computing devices. When cracks or peeling are detected on the sample surface, an audible and visual alarm is automatically triggered and the test is paused. At the same time, a defect image report containing a timestamp is generated.

[0013] Compared with existing technologies, the color long-term stability testing device for polymer concrete of this invention integrates three aging factors—ultraviolet light, temperature and humidity, and salt spray—with dynamic friction. Through orthogonal experiments, the optimal mix ratio parameters can be determined, shortening the testing cycle. Furthermore, it can simulate the aging process of polymer concrete under different climatic conditions according to testing needs, thereby improving testing efficiency. By obtaining the color difference of the specimen on the unaged surface, the aged surface, and the color after aging and dynamic friction, the long-term stability of the color can be evaluated. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the color long-term stability testing device without the partition installed according to this utility model.

[0015] Figure 2 This is a schematic diagram of the installation structure of the various components inside the compartment of this utility model.

[0016] Figure 3 This is a schematic diagram of the installation structure of the external components of the compartment of this utility model.

[0017] Figure 4 This is a schematic diagram of the installation structure of the lifting seat, electric friction roller and optical shaft of this utility model.

[0018] Reference numerals: 1. Test chamber seat, 2. Top cover, 3. Disc seat, 4. Specimen body, 5. Compartment, 6. Straight groove, 7. Electric linear slide, 8. Box body, 9. Pump set, 10. Atomizing head, 11. Hot air blower, 12. End seat, 13. Ultraviolet narrow-band LED array, 14. End seat, 15. Bellows protective cover, 16. Electric friction roller, 17. Outer cylinder, 18. Inner cylinder, 19. Linear lifting unit, 20. Guide sleeve, 21. Optical axis, 22. Outer sleeve, 23. Roller, 24. Hanging bolt, 25. Colored concrete sample block, 26. Embedded part, 27. Pad plate, 28. Screw body, 29. Top block, 30. Bolt body, 31. Rubber seal. Detailed Implementation

[0019] Example 1: like Figures 1 to 4 The apparatus shown is for testing the long-term color stability of polymer concrete, including The controller for overall machine control. Test chamber seat 1, wherein a specimen slot is provided on the inner side of the test chamber seat 1; Top cover 2, which is snapped and fixed to the top surface of test chamber seat 1; The specimen unit includes a disc base 3 that engages with the specimen slot, and a specimen body 4 is fixed on the top surface of the disc base 3; The long-term testing unit includes a compartment 5, which is bolted to the top inner side of the top cover 2. A straight groove 6 is formed on the front side of the compartment 5. An electric linear slide 7 is fixed to the straight groove 6 in the compartment 5. A housing 8 is also fixed inside the compartment 5, and a salt spray storage tank and a clean water storage tank are disposed inside the housing 8. The salt spray storage tank and the clean water storage tank are connected to a pump group 9 via a switching valve 14. The pump group 9 is connected to an atomizing head 10 at the bottom of the compartment 5. The bottom of the compartment 5 has fixed supports on both sides of the atomizing head 10. The hot air blower 11 has end seats 12 fixed on both sides of the bottom of the compartment 5 and the straight groove 6; a narrow-band ultraviolet LED array 13 is fixed on the rear side of the bottom of the compartment 5; a lifting seat is slidably arranged on the end seat 12; the top of the lifting seat is fixed to the sliding end of the electric linear slide table 7; bellows protective covers 15 are fixed on both sides of the top of the lifting seat outside the straight groove 6; an electric friction roller 16 is fixed at the bottom of the lifting seat; the electric friction roller 16 is pressed against the top surface of the specimen 4; and an optical axis 21 that slides with the lifting seat is fixed on the end seat 12.

[0020] During testing, the tray 3 supporting the specimen 4 is first attached to the specimen slot. Before testing, the color of the top surface of the specimen 4 is collected. Then, the controller performs environmental simulation control, specifically: the ultraviolet radiation intensity is controlled by the ultraviolet narrow-band LED array 13, and the ultraviolet radiation intensity is controlled within the range of 0.5-1.0W / m². Next, hot air is provided by the hot air blower 11, and the switching valve is switched to the clean water storage tank. The pump group 9 atomizes the clean water through the atomizing head 10 to achieve temperature and humidity control. The temperature and humidity cycle adopts a 24-hour simulation mode, and the temperature fluctuation range is ±2℃. Then, the switching valve is switched to the salt spray storage tank. The pump unit 9 sprays salt spray liquid through the atomizing head 10 to simulate the aging process under different climatic conditions. During the test, the electric friction roller 16 is driven by the lifting seat to press against the top surface of the specimen 4. The electric friction roller 16 rotates and rubs, and the electric linear slide 7 reciprocates, forming a friction zone on the top surface of the specimen 4. By obtaining the first set of test colors of the specimen 4 before the test, the second set of test colors of the specimen 4 after the aging test, and the third set of test colors of the specimen 4 after the aging test and rotational friction, the color long-term stability can be evaluated by comparing the color difference of the three sets of test colors.

[0021] The lifting seat includes an outer cylinder 17 and an inner cylinder 18. A linear lifting unit 19 is fixed between the outer cylinder 17 and the inner cylinder 18. Guide sleeves 20 are fixed on both the front and rear sides of the linear lifting unit 19 on the outer cylinder 17. The guide sleeves 20 are slidably installed with the optical axis 21. A pressure transmitter is fixed at the bottom of the inner cylinder 18. The electric friction roller 16 includes an outer sleeve 22. A motor and a roller 23 are arranged inside the outer sleeve 22. The motor and the roller 23 are connected by a transmission component. The bottom of the roller 23 protrudes from the bottom of the outer sleeve 22. Multiple hanging bolts 24 are embedded in the top of the inner side of the outer sleeve 22. The hanging bolts 24 are movably fitted with the bottom of the inner cylinder 18 and screwed with hanging nuts.

[0022] When the lifting platform is working, the linear lifting unit 19 drives the inner cylinder 18 to descend linearly along the outer cylinder 17. The inner cylinder 18 drives the electric friction roller 16 to descend synchronously. When the bottom of the electric friction roller 16 presses against the top surface of the specimen 4, the inner cylinder 18 continues to descend. The pressure transmitter at the bottom of the inner cylinder 18 presses against the top of the electric friction roller 16 and continues to descend with the inner cylinder 18 until the pressure transmitter detects that the pressure has reached the set value. Then, the linear lifting unit 19 locks in place. At this time, the electric friction roller 16 works, and the motor drives the roller 23 to rotate continuously. The roller 23 continuously rubs the specimen 4. By controlling the pressure value applied by the roller 23 to the specimen 4 and the rotation speed of the roller 23, the friction force on the specimen 4 can be controlled. The electric linear slide 7 drives the roller 23 to reciprocate, which can form a friction zone on the top surface of the specimen 4. By comparing the color difference between the friction zone and the surrounding area of ​​the specimen 4, the long-term stability of the color can be evaluated.

[0023] The linear lifting unit 19 is a hydraulic cylinder or an electric linear screw assembly; the hydraulic cylinder or electric linear screw assembly can realize the linear lifting of the inner cylinder 18 along the outer cylinder 17.

[0024] The specimen 4 includes a colored concrete sample block 25 made of polymer concrete through casting and curing; the bottom of the colored concrete sample block 25 is fixed with a pad 27 cast through a pre-embedded part 26, and a screw body 28 is fixed to the bottom of the pad 27. The screw body 28 moves through the disc base 3 and is screwed with a nut body; when making the specimen 4, it is first cast together with the colored concrete sample block 25 through the pre-embedded part 26 and cured. Then, the pad 27 is pressed onto the disc base 3 and the screw body 28 and the nut body are tightened to press the pad 27 and the disc base 3 together; then the disc base 3 is snapped into the specimen slot.

[0025] The top surface of the disc base 3 has straight grooves 6 on both sides, and a top block 29 is movably fitted inside the straight groove 6; a bolt body 30 is screwed to the bottom of the straight groove 6 to abut against the top block 29; during operation, the pad 27 and the disc base 3 are pressed together by the cooperation of the nut body and the screw body 28, and then the bolt body 30 is rotated to push the top block 29 up, so that the top of the top block 29 abuts tightly against the bottom of the colored concrete sample block 25.

[0026] A rubber seal 31 is fitted around the lower outer side of the colored concrete sample block 25. The compartment 5, the bellows cover 15 and the rubber seal 31 can seal salt spray, moisture and ultraviolet rays around the colored concrete sample block 25, preventing them from entering the tray 3 and the compartment 5.

[0027] A multispectral imager is also fixed to the top of the compartment 5. The controller activates the multispectral imager every 24 hours to perform a full-surface scan and generate chromaticity parameters (Lab). The system generates a spatiotemporal distribution map of the color difference ΔE and uploads the collected data to a computer. The computer analyzes the changing trend of the color difference ΔE in real time through edge computing devices. When cracks or peeling are detected on the sample surface, an audible and visual alarm is automatically triggered and the test is paused. At the same time, a defect image report containing a timestamp is generated.

[0028] The above embodiments are merely preferred embodiments of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model are included within the scope of the present utility model.

Claims

1. A device for testing the long-term color stability of polymer concrete, characterized in that: include The controller for overall machine control. A test chamber seat, wherein a specimen slot is provided on the inner side of the test chamber seat; Top cover, which is snapped and fixed to the top surface of the test chamber seat; The specimen unit includes a disk base that engages with a specimen slot, and a specimen body is fixed to the top surface of the disk base; The long-term testing unit includes a compartment, which is bolted to the top inner side of a top cover. A straight groove is formed on the front of the compartment. An electric linear slide is fixed to the compartment at the straight groove. A housing is also fixed inside the compartment, containing a salt spray reservoir and a clean water reservoir. The salt spray reservoir and the clean water reservoir are connected to a pump unit via a switching valve. The pump unit is connected to an atomizing head at the bottom of the compartment. Hot air blowers are fixed to both sides of the atomizing head at the bottom of the compartment. End seats are fixed to both sides of the straight groove at the bottom of the compartment. A narrow-band ultraviolet LED array is fixed to the rear bottom of the compartment. A lifting seat is slidably mounted on the end seat. The top of the lifting seat is fixed to the sliding end of the electric linear slide. Bellows protective covers are fixed to both sides of the top of the lifting seat outside the straight groove. An electric friction roller is fixed to the bottom of the lifting seat. The electric friction roller presses against the top surface of the specimen. An optical axis that slides with the lifting seat is fixed on the end seat.

2. The device for testing the long-term color stability of polymer concrete according to claim 1, characterized in that: The lifting base includes an outer cylinder and an inner cylinder, with a linear lifting unit fixed between the outer and inner cylinders. Guide sleeves are fixed to both the front and rear sides of the linear lifting unit on the outer cylinder, and the guide sleeves are slidably installed with the optical shaft. A pressure transmitter is fixed to the bottom of the inner cylinder. The electric friction roller includes an outer sleeve, with a motor and a roller disposed inside the outer sleeve. The motor and the roller are connected by a transmission component. The bottom of the roller protrudes from the bottom of the outer sleeve, and multiple hanging bolts are embedded in the top of the inner sleeve. The hanging bolts are movably engaged with the bottom of the inner cylinder and screwed with hanging nuts.

3. The device for testing the long-term color stability of polymer concrete according to claim 2, characterized in that: The linear lifting unit is a hydraulic cylinder or an electric linear screw assembly.

4. The device for testing the long-term color stability of polymer concrete according to claim 1, characterized in that: The specimen includes a colored concrete block made by pouring and curing polymer concrete; a pad is fixed to the bottom of the colored concrete block by a pre-embedded part, and a screw is fixed to the bottom of the pad. The screw moves through the disc seat and is screwed with a nut.

5. The device for testing the long-term color stability of polymer concrete according to claim 4, characterized in that: The top surface of the disc base has straight grooves on both sides, and a top block is movably fitted inside the straight groove; a bolt body that abuts against the top block is screwed to the bottom of the straight groove.

6. The device for testing the long-term color stability of polymer concrete according to claim 4, characterized in that: A rubber sealing seat is fitted onto the lower outer side of the colored concrete sample block.

7. The device for testing the long-term color stability of polymer concrete according to claim 1, characterized in that: A multispectral imager is also fixed to the top of the compartment.

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