Waste brick micro-powder-based geopolymer concrete and preparation device and method thereof

Abstract

The invention discloses waste brick micro powder based geopolymer concrete and a preparation device and method, and belongs to the technical field of building materials, the waste brick micro powder based geopolymer concrete comprises a crushing device, a grinding device, a conveying device, a stirring device and a forming device; the crushing device is used for crushing waste bricks to form waste brick fragments, the grinding device is used for grinding the waste brick fragments to form waste brick micro powder, and the two ends of the conveying device correspond to the discharging end of the crushing device and the feeding end of the grinding device correspondingly and are used for conveying the waste brick fragments. According to the invention, the waste brick micro powder is used as a mixed material or admixture for replacing cement and reacts with water to generate hydrated calcium silicate gel and calcium hydroxide; the hydrated calcium silicate gel can bond the aggregate to form a compact structure with certain mechanical strength, and the calcium hydroxide can react with amorphous SiO2 and Al2O3 in the waste brick micro powder to generate hydrated calcium silicate, hydrated calcium aluminate or hydrated calcium aluminosilicate; a series of problems caused by nowhere to stack a large amount of waste concrete are effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of building materials technology, and particularly relates to a waste brick micro-powder base polymer concrete, its preparation device and method. Background Technology

[0002] Geopolymers, or simply geopolymers, are natural or artificial silicon- and aluminum-containing materials that, under alkaline conditions, undergo geopolymerization to form cementitious materials with high strength, good chemical stability, and durability. Geopolymer cementitious materials are a new type of alkali-activated cementitious material, different from ordinary silicate cement. Compared to silicate cement, they have abundant raw material resources, low energy consumption, almost no pollution, and do not consume limestone resources, making them an environmentally friendly green building material. Considering the raw materials and processes, geopolymers can be defined as a new material with properties similar to ceramics, obtained through appropriate processing and chemical reaction using silicon- and aluminum-containing materials such as metakaolin or fly ash, and alkali activators. Its chemical composition is close to that of some natural volcanic ash. Considering their spatial structure and performance, geopolymers are a new type of high-performance inorganic polymeric material with a three-dimensional oxide network structure. Considering the internal chemical bonding, geopolymers are inorganic polymers with a framework of Si, Al, etc., linked by covalent bonds.

[0003] Currently, 1. During large-scale construction, there is also large-scale demolition of old buildings, generating a large amount of construction solid waste, mainly waste clay bricks and waste concrete. While waste clay bricks and concrete are generally used as roadbed filler, a large amount is still being stockpiled, occupying significant land resources and causing serious dust and soil pollution; 2. Every year, the world needs a large amount of electricity for residential and industrial production. Currently, the main power generation method is still thermal power, generating large amounts of industrial solid waste such as fly ash and slag. Besides being used in concrete production, there are still no efficient ways to treat this waste; 3. Current wall panel materials require additional insulation materials to achieve the required insulation performance, but insulation materials are often a major cause of fires, seriously threatening public safety and property. Furthermore, current lightweight self-insulating concrete requires autoclaving, which is energy-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide a waste brick micro-powder base polymer concrete, preparation device and method, which can use waste bricks as micro-base to produce geopolymer cementitious materials, which can replace existing ordinary silicate cement, effectively solving the problems of waste concrete stockpiling and disposal, occupying a large amount of land resources, and causing serious dust and soil pollution.

[0005] The present invention adopts the following technical solution: a preparation device for waste brick micropowder geopolymer concrete, comprising a crushing device, a grinding device, a conveying device, a mixing device, and a molding device; the crushing device is used to crush waste bricks to form waste brick fragments, the grinding device is used to grind the waste brick fragments to form waste brick micropowder, the two ends of the conveying device are respectively set to the discharge end of the crushing device and the feed end of the grinding device, and are used to convey the waste brick fragments, the mixing device is used to mix and react waste brick micropowder, slag, fly ash, aluminum powder, foam stabilizer and alkali activator in a set proportion to generate geopolymer concrete, and the molding device is used to shape the geopolymer concrete slurry.

[0006] Furthermore, the grinding device includes a grinding cylinder whose top end is connected to an inertial dust collector, a feeding hopper on one side of the grinding cylinder, and a discharge end of the conveying device corresponding to the feeding hopper; a cover with an air inlet and a fan outlet fixedly installed at the bottom end of the grinding cylinder; a vertical shaft coaxially installed inside the cover and rotatably connected to the cover, the bottom end of the vertical shaft being connected to a drive device and a perforated frame fixedly installed at the top end, a number of grinding rollers evenly arranged along the circumference on the perforated frame, a grinding ring fixedly installed on the inner wall of the cover, and a grinding gap being formed between the grinding rollers and the inner wall of the grinding ring.

[0007] Furthermore, a fixed plate is fixedly installed inside the cover, a receiving plate is fixedly installed on the upper end face of the fixed plate, a rotating plate is fixedly installed on the vertical shaft, the rotating plate is located inside the receiving plate, and a number of scrapers are inclined around the circumference of the rotating plate, with the bottom end of each scraper contacting the upper end face of the receiving plate.

[0008] Furthermore, a rotating shaft is fixedly installed on the bottom surface of the shovel, and a mounting block is fixedly installed on the upper end surface of the rotating disk. The upper end surface of the mounting block has a mounting groove perpendicular to the rotating shaft. The rotating shaft is rotatably connected to the mounting block. A symmetrical plane is opened on the rotating shaft located in the mounting groove. A compensation block is installed in the mounting groove. One end of the compensation block is engaged with the plane of the rotating shaft. The other end of the compensation block has an elongated through groove. A pre-tightening bolt is threaded into the mounting block. The pre-tightening bolt is located in the elongated through groove. A pressure plate is sleeved on the pre-tightening bolt. A compensation spring is sleeved on the pre-tightening bolt between the pressure plate and the compensation block.

[0009] Furthermore, the inner end of the rotating shaft is provided with an inner shaft through a ratchet mechanism, and a cam mechanism is coaxially provided inside the grinding cylinder. The cam mechanism includes a cam and a push rod. The push rod is slidably arranged in the vertical direction inside the vertical shaft. A transmission device is provided between the bottom end of the push rod and the inner shaft. The cam is fixedly arranged with the output end of the hydraulic telescopic rod, and the hydraulic telescopic rod is fixedly arranged with the grinding cylinder.

[0010] Furthermore, the transmission device includes several transmission rods, with a first bevel gear fixedly installed at the outer end of the transmission rod and a second bevel gear fixedly installed at the inner end of the inner shaft. The transmission rods are located between two adjacent inner shafts and the first bevel gear meshes with the corresponding second bevel gear. Each transmission rod is rotatably connected to the rotating disk, and a lever is fixedly installed radially on each transmission rod. The inner end of each lever extends to below the bottom end of the top rod.

[0011] Furthermore, the ratchet mechanism includes a ratchet and a pawl. A ratchet disc is fixedly mounted on the side of the ratchet away from the rotating shaft. The side of the ratchet disc away from the ratchet is coaxially fixed with the inner shaft. A ratchet cover is rotatably connected to the side of the ratchet disc near the ratchet. The outer side of the ratchet cover is coaxially fixed with the rotating shaft. The pawl is rotatably connected to the inner wall of the ratchet cover. A torsion spring is mounted on the pawl. One end of the torsion spring is fixedly connected to the ratchet cover, and the other end of the torsion spring is fixedly connected to the pawl. The torsion spring always drives the pawl to rotate counterclockwise, so that the front end of the pawl abuts against the ratchet.

[0012] Furthermore, the vertical shaft includes an upper shaft and a lower shaft. The bottom end of the lower shaft is connected to the driving device. The push rod is slidably disposed inside the upper shaft in the vertical direction. The bottom end of the upper shaft is fixedly disposed to the rotating disk, and the top end of the lower shaft is fixedly disposed to the rotating disk. Several return springs are fixedly disposed on the upper end surface of the lower shaft, and the top end of each return spring is fixedly connected to the corresponding lever.

[0013] A method for preparing geopolymer concrete using any of the above-mentioned preparation devices, characterized in that it includes the following steps: S1: preparing waste brick powder using a crushing device; S3. Use a grinding device to grind and dry the waste brick fragments to obtain waste brick powder with a set particle size. S2: Mix solid raw materials using a mixing device: Take 10-40 parts of slag, 0-20 parts of fly ash or one or more, and 60-90 parts of waste brick powder by mass, add 0.06-0.45 parts of foam stabilizer and put them into the mixing device and mix evenly. S3: Add 12-45 parts of alkaline activator and stir for the set time; S4: Mix 0.12-0.6 parts of aluminum powder with water, pour the mixture into a mixing device and mix for a set time to prepare a geopolymer concrete slurry; S5: Using a molding device to shape geopolymer concrete slurry; S6: Remove the concrete that overflows from the mold surface, smooth the surface, cover with a film, and let it stand before demolding; S7: Moisten the concrete for curing.

[0014] A type of brick micropowder-based polymer concrete obtained using the above-mentioned preparation apparatus comprises 60-150 parts of cementitious material, 0.12-0.6 parts of aluminum powder, 0.06-0.45 parts of foam stabilizer, and 12-45 parts of alkali activator. The cementitious material comprises one or more of 10-40 parts of slag and 0-20 parts of fly ash, and 60-90 parts of waste brick micropowder. The alkali activator is water glass prepared with sodium hydroxide, with a water glass modulus of 1.2-1.5. The water includes the water contained in the water glass solution and water added separately, and the mass ratio of water to cementitious material is 0.37-0.41.

[0015] I. This invention uses a crushing device, a grinding device, a stirring device, and a molding device to crush and grind waste bricks into waste brick powder. Utilizing the pozzolanic activity of the amorphous SiO2 and Al2O3 contained in the waste brick powder, it can react with water under the action of an alkaline activator to generate hydraulic hydration products with gelling properties, i.e., cementitious materials. The waste brick powder can be used as a cementitious material or admixture to react with water to generate hydrated calcium silicate gel and calcium hydroxide. Therefore, by stirring the waste brick powder and adding an alkaline activator, the resulting waste brick powder-based polymer lightweight self-insulating concrete possesses self-insulating properties and lightweight characteristics, enabling it to replace existing ordinary silicate concrete and effectively solving a series of problems caused by the lack of storage space for large quantities of waste concrete.

[0016] II. This invention utilizes the pozzolanic activity of waste brick powder, which, under the action of an alkaline activator, reacts with water to generate a hydraulic hydration product with gelling properties, resulting in high-strength artificial aggregates or autoclaved aerated concrete (AAC) blocks. These artificial aggregates are primarily prepared from construction and industrial solid waste, enabling not only the resource utilization of waste concrete but also allowing the prepared aggregates to replace natural river sand in engineering construction, alleviating the problem of over-exploitation and supply shortage of natural river sand. The AAC blocks can be used as building bricks.

[0017] Third, this invention, by setting up a scraper, a rotating shaft, a compensation block, a compensation spring, and a pre-tightening bolt, allows the compensation spring to press down on one end of the compensation block to rotate when the scraper wears out. This causes the other end of the compensation block to drive the rotating shaft to rotate inward (towards the center of the receiving plate). The rotating shaft then drives the bottom end of the scraper to rotate downward, so that the bottom end of the scraper contacts the upper surface of the receiving plate again. This achieves the purpose of automatic compensation after the bottom end of the scraper wears out, saving the time of stopping to adjust the scraper and improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2This is a three-dimensional structural diagram of the vertical bucket elevator in this invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the grinding cylinder in this invention; Figure 4 This is a three-dimensional structural diagram of the wind turbine in this invention; Figure 5 This is a schematic diagram of the internal three-dimensional structure of the grinding cylinder in this invention; Figure 6 This is a schematic diagram of the internal three-dimensional structure of the cover in this invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the fixed cylinder in this invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the spiral plate in this invention; Figure 9 This is a three-dimensional structural diagram of the push rod in this invention; Figure 10 This is a schematic diagram of the upper shaft three-dimensional structure in this invention; Figure 11 This is a schematic diagram of the lower shaft three-dimensional structure in this invention; Figure 12 This is a three-dimensional structural diagram of the receiving plate in this invention; Figure 13 This is a schematic diagram of the internal three-dimensional structure of the rotating disk in this invention; Figure 14 This is a schematic diagram of the internal three-dimensional structure of the fixed cylinder in this invention; Figure 15 This is a schematic diagram of the three-dimensional structure of the cam in this invention; Figure 16 This is a three-dimensional structural diagram of the lever in this invention; Figure 17 This is a top view schematic diagram of the lever structure in this invention; Figure 18 This is a three-dimensional structural diagram of the shovel blade in this invention; Figure 19 This is a schematic diagram of the three-dimensional structure of the compensation block in this invention; Figure 20 This is a diagram showing the positional relationship between the pawl and ratchet when the shovel strikes the receiving plate in this invention. Figure 21 This is a diagram showing the positional relationship between the pawl and ratchet during normal operation in this invention. Figure 22 This is a schematic diagram of the three-dimensional structure of the separation cylinder in this invention.

[0019] In the diagram, 1. Crushing device; 2. Conveying device; 3. Grinding device; 4. Mixing device; 5. Forming device; 6. Grinding cylinder; 7. Material pipe; 8. Inertial dust collector; 9. Feeding hopper; 10. Cover; 11. Air inlet; 12. Fan; 13. Discharge outlet; 14. Vertical shaft; 15. Drive device; 16. Perforated frame; 17. Grinding roller; 18. Grinding ring; 19. Mold; 20. Fixed plate; 21. Receiving plate; 22. Rotating plate; 23. Shovel; 24. Rotating shaft; 25. Mounting block; 26. Mounting groove; 27. Plane; 28. Compensating block; 29. ​​Long through groove; 30. Pre-tightening bolt; 31. Pressure plate; 32. Compensating spring; 33. Ratchet mechanism; 34. Inner shaft; 36. Cam; 37. Push rod; 38. Hydraulic telescopic rod; 39. Transmission rod; 40. First bevel gear 41. Second bevel gear; 42. Lever; 43. Third bevel gear; 44. Fourth bevel gear; 45. Housing; 46. Ratchet; 47. Pad; 48. Ratchet disc; 49. Ratchet cover; 50. Torsion spring; 51. Upper shaft; 52. Lower shaft; 53. Return spring; 54. Disc; 55. Protrusion; 56. Spherical protrusion; 57. Fixed cylinder; 58. Support rod; 59. Top plate 60. Spiral plate; 61. Air outlet; 62. Ventilation hole; 63. Air vent; 64. Baffle plate; 65. Separating disc; 66. Separating rod; 67. Rotating shaft; 68. Top motor; 69. Separating cylinder; 70. Baffle cover; 71. Round hole; 72. Suction pipe; 73. Discharge port; 74. Feeding device; 75. Dosing cup; 76. Pushing device; 77. Straight trough; 78. Workbench. Detailed Implementation

[0020] Please see Figure 1-22 The present invention will now be described in detail with reference to the accompanying drawings and embodiments: The apparatus for preparing waste brick micropowder-based polymer concrete according to the present invention includes a crushing device 1, a conveying device 2, a grinding device 3, a mixing device 4, and a molding device 5. In use, the crushing device 1 crushes the waste concrete and feeds it into the grinding device 3 via the conveying device 2. The grinding device 3 grinds the concrete fragments into powder. 60-90 parts of waste brick micropowder are added to the mixing device 4 for stirring, along with 10-40 parts of slag and 0-20 parts of fly ash, and then 0.12-0.6 parts of aluminum powder, 0.06-0.45 parts of foam stabilizer, and a water glass solution with a modulus of 1.2-1.5. Through thorough stirring by the mixing device 4, the waste brick micropowder, utilizing its inherent pozzolanic activity, reacts with water under the action of an alkaline activator to generate a hydraulic hydration product with gel-like properties, resulting in high-strength artificial aggregate, autoclaved aerated concrete blocks, or self-insulating wall panel materials. Artificial aggregates, autoclaved aerated concrete blocks, or self-insulating wall panels are mainly made from construction solid waste and industrial solid waste. They can not only realize the resource utilization of waste concrete, but also the aggregates prepared can replace natural river sand in engineering construction, alleviating the problem of over-exploitation and shortage of natural river sand. Autoclaved aerated concrete blocks have the same shape and function as building bricks.

[0021] In this embodiment, the grinding device 3 includes a grinding cylinder 6. The top of the grinding cylinder 6 is connected to an inertial dust collector 8 through a feed pipe 7. A feeding hopper 9 is provided on one side of the grinding cylinder 6. The discharge end of the conveying device 2 is correspondingly provided to the feeding hopper 9. The conveying device 2 conveys the crushed material into the feeding hopper 9 to feed the grinding device 3. A cover 10 is fixedly provided at the bottom of the grinding cylinder 6. An air inlet 11 is provided on one side of the cover 10. The air inlet 11 is connected to the outlet 13 of the fan 12. A vertical shaft 14 is coaxially provided inside the cover 10. The vertical shaft 14 is rotatably connected to the cover 10. The bottom end of the vertical shaft 14 is connected to a driving device 15. The driving device 15 drives the vertical shaft 14 to rotate. A pergola 16 is fixedly provided at the top of the vertical shaft 14. Several grinding rollers 17 are evenly arranged along the circumference of the pergola 16. Grinding rollers 17 are fixedly provided on the inner side wall of the cover 10. A grinding gap is formed between the inner wall of the grinding ring 18 and the grinding roller 17. The driving device 15 drives the vertical shaft 14 to rotate, which in turn drives the plum blossom frame 16 to rotate. The plum blossom frame 16 drives each grinding roller 17 to rotate, so that the material between the outer surface of the grinding roller 17 and the inner wall of the grinding ring 18 is ground and broken. At the same time, the fan 12 exhausts air into the cover 10, forming an upward airflow in the grinding cylinder 6. The airflow carries the particles ground into dust and rises into the inertial dust collector 8. The inertial dust collector 8 separates the gas from the dust and collects the dust to complete the purpose of dust discharge. Then, the collected dust is added to the stirring device 4 with slag, fly ash, aluminum powder, foam stabilizer and water glass in a set ratio for stirring and reaction, finally forming a hydraulic hydration product. Then, it is manufactured into artificial aggregate or non-autoclaved aerated concrete blocks through the mold 19.

[0022] In this embodiment, a fixed disk 20 is fixedly installed inside the cover 10, and a receiving disk 21 is fixedly installed on the upper end face of the fixed disk 20. The vertical shaft 14 is rotatably connected to both the fixed disk 20 and the receiving disk 21. A rotating disk 22 is fixedly installed on the vertical shaft 14, and the rotating disk 22 is located inside the receiving disk 21. The vertical shaft 14 drives the rotating disk 22 to rotate within the receiving disk 21. Several scrapers 23 are inclined around the circumference of the rotating disk 22, and the bottom end of each scraper 23 contacts the upper end face of the receiving disk 21. During use, the material added from the feeding hopper 9, except for a portion... Some material enters between the grinding roller 17 and the grinding ring 18, while some falls into the receiving plate 21. At this time, the vertical shaft 14 rotates, driving the rotating disk 22 to rotate. The rotating disk 22 drives several shovels 23 to rotate. The shovels 23 scoop up the material in the receiving plate 21, causing the material fragments to rise along the inclined surface of the shovels 23 and enter between the grinding roller 17 and the grinding ring 18 for grinding. During the grinding process, the airflow continuously carries the particles ground into dust upwards to complete the discharge. The material that the airflow cannot carry is repeatedly ground with the help of the shovels 23.

[0023] Angular directional words Figure 16 and Figure 17Based on the fact that the scraper 23 and the rotating disk 22 are fixedly installed, during use, when the scraper 23 wears down, a gap appears between the bottom end of the scraper 23 and the upper end face of the receiving disk 21, reducing the scraping efficiency of the scraper 23. It is necessary to stop the machine and adjust the position of the scraper 23 so that the bottom end of the scraper 23 contacts the upper end face of the receiving disk 21. To solve this problem, in this embodiment, a rotating shaft 24 is fixedly installed on the bottom surface of the scraper 23, and a mounting block 25 is fixedly installed on the upper end face of the rotating disk 22. A mounting groove 26 perpendicular to the rotating shaft 24 is opened on the upper end face of the mounting block 25. The rotating shaft 24 is rotatably connected to the mounting block 25. A symmetrical plane 27 is opened on the rotating shaft 24 located in the mounting groove 26. A compensation block 28 is installed in the mounting groove 26. One end of the compensation block 28 is engaged with the plane 27 of the rotating shaft 24, and the other end of the compensation block 28 has an elongated through groove 29. A pre-tightening bolt 30 is threaded into the mounting block 25. The pre-tightening bolt 30 is located in the elongated through groove 29. A pressure plate 31 is fitted on the pre-tightening bolt 30. A compensation spring 32 is fitted on the pre-tightening bolt 30 between the pressure plate 31 and the compensation block 28. By rotating the pre-tightening bolt 30, the pre-tightening bolt 30 moves downward, causing the pressure plate 31 to move downward, further compressing the compensation spring 32, thereby increasing the pre-tightening force of the compensation spring 32. When the scraper 23 is worn, the compensation spring 32 presses down on one end of the compensation block 28, causing the other end of the compensation block 28 to drive the rotating shaft 24 to rotate inward (towards the center of the receiving plate 21). The rotating shaft 24 drives the bottom end of the scraper 23 to rotate downward, so that the bottom end of the scraper 23 contacts the upper surface of the receiving plate 21 again, achieving the purpose of automatic compensation after the bottom end of the scraper 23 is worn. This saves the time of stopping to adjust the scraper 23 and improves production efficiency. When the bottom end of the scraper 23 is worn to a set degree, it needs to be replaced entirely.

[0024] Angular directional words Figure 16 and Figure 17Based on the above scheme, the shovel 23 can freely rotate upwards against the force of the compensating spring 32. Therefore, in actual use, material fragments may accumulate between the shovel 23 and the receiving plate 21, affecting the shovel 23's material-shoveling efficiency. To solve this problem, in this embodiment, the inner end of the rotating shaft 24 is provided with an inner shaft 34 via a ratchet mechanism 33, and a cam mechanism is coaxially provided inside the grinding cylinder 6. The cam mechanism includes a cam 36 and a push rod 37, with the push rod 37 sliding along the vertical direction on the vertical shaft 1. 4. During operation, the push rod 37 rotates with the vertical shaft 14. As the push rod 37 rotates, it moves intermittently up and down in conjunction with the cam 36. A transmission device is installed between the bottom end of the push rod 37 and the inner shaft 34. When the push rod 37 moves downward, it drives the inner shaft 34 to rotate outward (away from the center of the receiving plate 21) through the transmission device. This causes the inner shaft 34 to drive the rotating shaft 24 to rotate via the ratchet mechanism 33. The rotating shaft 24 then drives the bottom end of the scraper 23 to rotate upward. The upward rotation of the scraper 23 requires overcoming the force of the compensating spring 32. When the push rod... When 37 moves upward, the bottom end of the push rod 37 disengages from the transmission device. At this time, the bottom end of the scraper 23 rotates downward under the action of the compensating spring 32, causing the bottom end of the scraper 23 to strike the upper end surface of the receiving plate 21. After the scraper 23 strikes the upper end surface of the receiving plate 21 several times, the output end of the cam 36 and the hydraulic telescopic rod 38 are fixedly set. The hydraulic telescopic rod 38 is fixedly set to the grinding cylinder 6. The hydraulic telescopic rod 38 drives the cam 36 to move upward a set distance, so that the top end of the cam 36 and the push rod 37... When the material is disengaged, the vertical shaft 14 rotates, causing the top rod 37 to rotate. The top rod 37 no longer moves up and down. After the scraper 23 strikes the upper surface of the receiving plate 21 several times, it continues to work normally. After the scraper 23 has been working normally for a period of time, it strikes the upper surface of the receiving plate 21 up and down to prevent the fragments from getting stuck between the scraper 23 and the receiving plate 21. At the same time, the scraper 23 strikes the receiving plate 21, which also causes the material fragments to jump on the receiving plate 21, changing the posture of the material fragments and making it easier for the scraper 23 to pick up the material fragments.

[0025] Angular directional words Figure 16 and Figure 17In this embodiment, the transmission device includes several transmission rods 39. A first bevel gear 40 is fixedly mounted on the outer end of each transmission rod 39, and a second bevel gear 41 is fixedly mounted on the inner end of each inner shaft 34. The transmission rods 39 are located between two adjacent inner shafts 34, and the first bevel gear 40 meshes with the corresponding second bevel gear 41. Each transmission rod 39 is rotatably connected to a rotating disk 22. A lever 42 is fixedly mounted radially on each transmission rod 39. The inner end of each lever 42 extends below the bottom end of a top rod 37. When the top rod 37 moves up and down, the bottom end of the top rod 37 moves downward, driving the inner end of each lever 42 to rotate downward, thereby causing each transmission rod 39 to rotate inward. This allows the transmission rod 39 to drive the second bevel gear 41 through the first bevel gear 40. The bevel gear 41 rotates outward, which in turn drives the inner shaft 34 to rotate outward. The inner shaft 34 drives the rotating shaft 24 to rotate outward through the ratchet mechanism 33. The rotating shaft 24 drives the bottom end of the scraper 23 to rotate upward, so that when the push rod 37 moves downward, it drives the bottom end of the scraper 23 to rotate upward through the transmission device. When the push rod 37 moves upward, the bottom end of the scraper 23 rotates downward under the action of the compensating spring 32 and re-contacts the upper end surface of the receiving plate 21, so as to achieve the purpose of the scraper 23 striking the receiving plate 21 and preventing any fragments from being placed under the scraper 23. At the same time, when the scraper 23 strikes the receiving plate 21, it will also cause the material fragments on the upper end surface of the receiving plate 21 to jump up, so that the material fragments change their posture and make it easier for the scraper 23 to scoop up the material fragments.

[0026] To ensure smoother movement of the transmission rods 39, in this embodiment, a third bevel gear 43 is fixedly installed at the inner end of each transmission rod 39, and a fourth bevel gear 44 is fixedly installed on each transmission rod 39 near the first bevel gear 40. The third bevel gear 43 meshes with the corresponding fourth bevel gear 44. When the transmission rod 39 rotates inward, it first drives the second bevel gear 41 to rotate through the first bevel gear 40, and simultaneously drives the corresponding fourth bevel gear 44 and third bevel gear 43 to rotate through the third bevel gear 43 and fourth bevel gear 44, respectively. The third bevel gear 43 at the inner end of the transmission rod 39 drives the fourth bevel gear 44 on the adjacent transmission rod 39 to rotate, and the fourth bevel gear 44 on the transmission rod 39 drives the third bevel gear 43 on the adjacent transmission rod 39 to rotate. This achieves the goal of simultaneously driving the other transmission rods 39 to rotate inward synchronously even when one of the transmission rods 39 rotates, and the transmission rods 39 rotate synchronously inward or synchronously outward.

[0027] In this embodiment, a housing 45 adapted to the transmission rod 39 is fixedly provided on the upper end surface of the rotating disk 22, and each transmission rod 39 is rotatably connected to the corresponding housing 45.

[0028] In the above scheme, after the blade 23 wears, the bottom end of the blade 23 rotates downward under the action of the compensation spring 32 to achieve automatic compensation. However, if one blade 23 wears, only that blade 23 needs to be compensated, while the other blades 23 do not need to be compensated. The fact that the other blades 23 are not worn will also interfere with the automatic compensation of the blade 23. The ratchet mechanism 33 enables the bottom end of the blade 23 to rotate downward after one blade 23 wears to achieve compensation. When the lever 42 is pressed down by the push rod 37 and rotates downward, it can drive the bottom end of each blade 23 to rotate upward synchronously to achieve a knocking action.

[0029] The function of the ratchet mechanism 33 is to enable the bottom end of each scraper 23 to rotate synchronously upward when the push rod 37 presses down on the lever 42; and during normal use, the wear of a single scraper 23 does not affect the automatic compensation of that scraper 23.

[0030] by Figure 20 and Figure 21 Based on this embodiment, the ratchet mechanism 33 includes a ratchet 46 and a pawl 47. A ratchet disc 48 is fixedly disposed on the side of the ratchet 46 away from the rotating shaft 24. The side of the ratchet disc 48 away from the ratchet 46 is coaxially fixedly disposed with the inner shaft 34. A ratchet cover 49 is rotatably connected to the side of the ratchet disc 48 close to the ratchet 46. The outer side of the ratchet cover 49 is coaxially fixedly disposed with the rotating shaft 24. The pawl 47 is rotatably connected to the inner side wall of the ratchet cover 49. A torsion spring 50 is disposed on the pawl 47. One end of the torsion spring 50 is fixedly connected to the ratchet cover 49, and the other end of the torsion spring 50 is fixedly disposed with the pawl 47. The torsion spring 50 always drives the pawl 47 to rotate counterclockwise, so that the front end of the pawl 47 abuts against the ratchet 46.

[0031] by Figure 20 and Figure 21 Based on this embodiment, the vertical shaft 14 includes an upper shaft 51 and a lower shaft 52. The bottom end of the lower shaft 52 is connected to the driving device 15. The driving device 15 drives the lower shaft 52 to rotate, thereby driving the upper shaft 51 to rotate. The push rod 37 is slidably disposed inside the upper shaft 51 in the vertical direction. The bottom end of the upper shaft 51 is fixedly disposed with the rotating disk 22, and the top end of the lower shaft 52 is fixedly disposed with the rotating disk 22. Several return springs 53 are fixedly disposed on the upper end surface of the lower shaft 52. The top end of each return spring 53 is fixedly connected to the corresponding lever 42. When the push rod 37 moves upward, the lever 42 rotates upward under the action of the return spring 53, so that the inner end of the lever 42 is always in contact with the bottom end of the push rod 37. When no return spring 53 is provided, the compensation spring 32 will also indirectly drive the outer end of the lever 42 to rotate upward. At this time, the compensation spring 32 and the return spring 53 work together to push the lever 42 to rotate upward.

[0032] In use, when the striking function is achieved, the cam 36 moves downward under the drive of the hydraulic telescopic rod 38, causing the disc 54 and the protrusion 55 to move downward and contact the spherical protrusion 56 of the push rod 37. This causes the push rod 37 to move up and down as it rotates with the upper shaft 51. When the push rod 37 moves downward, it presses the lever 42 to rotate downward, causing the inner shaft 34 to drive the ratchet 46 to rotate outward (i.e., to drive the ratchet 46 to rotate clockwise). The outward rotation of the ratchet 46 pushes the pawl 47 and the ratchet cover 49 to rotate outward. The ratchet cover 49 drives the rotating shaft 24 to rotate outward, and the rotating shaft 24 drives the bottom end of the blade 23 to rotate upward. When the push rod 37 moves upward... The bottom end of the scraper 23 rotates downward under the action of the compensating spring 32, striking the upper surface of the receiving plate 21. At this time, the rotating shaft 24 drives the ratchet cover 49 to rotate inward, causing the pawl 47 to push the ratchet 46 to rotate counterclockwise, which in turn drives the inner shaft 34 to rotate inward, causing the inner end of the lever 42 to rotate upward and follow the bottom end of the push rod 37 to move. In this way, the push rod 37 moves up and down to complete the striking of the receiving plate 21. When the striking is completed, the hydraulic telescopic rod 38 drives the disc 54 to move upward, so that the push rod 37 stops moving up and down when it follows the rotation of the upper shaft 51. The scraper 23 contacts the receiving plate 21 under the action of the compensating spring 32. At this time, the pawl 47 and the ratchet 46 are in the following state. Figure 20 When the disc 54 of the cam 36 moves upward and disengages from the spherical protrusion 56 of the push rod 37, the return spring 53 continues to push the lever 42 upward a set distance (but the protrusion 55 and the spherical protrusion 56 are still disengaged), causing the ratchet 46 to rotate counterclockwise a set distance again. At this time, the pawl 47 and the ratchet 46 are in the following state: Figure 21 This creates a set distance 'a' between the teeth of the pawl 47 and the ratchet 46. At this time, the blade 23 works normally. If any blade 23 wears out after prolonged use, the compensation spring 32 will drive the bottom of that blade 23 to rotate downwards to achieve automatic compensation without affecting the other blades 23. As a result, the distance 'a' becomes smaller. When the distance 'a' disappears, the corresponding blade 23 can no longer automatically compensate. At this time, the wear of the blade 23 has reached its limit and it needs to be replaced. The replaced blade 23 does not need automatic compensation, so the distance 'a' reappears.

[0033] In this embodiment, a fixed cylinder 57 is fixedly installed at the fixed end of the hydraulic telescopic rod 38. The fixed cylinder 57 is fixedly installed with the grinding cylinder 6 by several support rods 58. The cam 36 includes a disc 54. Several radially arranged protrusions 55 are fixedly installed on the lower end surface of the disc 54. A top plate 59 is fixedly installed at the top end of the push rod 37. A spherical protrusion 56 is fixedly installed on the upper end surface of the top plate 59 off-center. In use, the hydraulic telescopic rod 38 is automatically controlled to push the disc 54 downward at regular intervals. At this time, the push rod 37 is driven by the vertical shaft 14 to rotate continuously. When the protrusions 55 of the disc 54 contact the spherical protrusions 56, the push rod 37 is pressed downward, causing the bottom end of the scraper 23 to rise. When the protrusions 55 pass the spherical protrusions 56, the push rod 37 is pressed downward, causing the bottom end of the scraper 23 to rise. At 6 o'clock, the push rod 37 moves upward under the action of the compensating spring 32, so that the spherical protrusion 56 of the push rod 37 is always in contact with the lower end face of the disc 54 or the outer surface of the protrusion 55. At the same time, the scraper 23 strikes the upper end face of the receiving plate 21. As the push rod 37 continues to rotate, the push rod 37 moves up and down reciprocally, so that the scraper 23 continuously strikes the receiving plate 21. After several strikes, the hydraulic telescopic rod 38 drives the disc 54 to move upward, so that the disc 54 is disengaged from the top plate 59. The protrusion 55 of the disc 54 no longer interferes with the rotation of the spherical protrusion 56 on the top plate 59. Therefore, the push rod 37 no longer moves up and down while rotating with the vertical shaft 14. The bottom end of the scraper 23 is always in contact with the upper end face of the receiving plate 21, and the scraper 23 scrapes material normally.

[0034] When the scraper 23 scoops up material fragments from the receiving plate 21, some smaller fragments adhere to the upper surface of the receiving plate 21. Although the scraper 23 intermittently taps during normal operation, it is still difficult to scoop up the smaller material fragments. To solve this problem, in this embodiment, a set interval distance is set between the bottom of the fixed plate 20 and the cover 10. At this time, when the exhaust air from the fan 12 blows into the cover 10, it will be divided into two parts. One part enters above the fixed plate 20, realizing the normal function of carrying dust particles upward; the other part... Part of the air enters below the fixed plate 20, forming a bottom space between the bottom of the fixed plate 20 and the cover 10; the remaining air enters the bottom space. A spiral plate 60 is fixedly installed on the lower end face of the fixed plate 20, and the bottom end of the spiral plate 60 is fixed to the air inlet 11 of the cover 10, so that the air from the fan 12 entering from the air inlet 11 of the cover 10 can enter above the bottom end of the spiral plate 60, and also enter above the fixed plate 20. The top end of the spiral plate 60 is fixedly installed to the lower end face of the fixed plate 20, while the upper end face of the fixed plate 20 is fixed to... An air outlet 61 is provided at the top of the spiral plate 60; several ventilation holes 62 are evenly provided on the upper surface of the receiving plate 21, and ventilation holes 63 corresponding to the ventilation holes 62 are provided on the fixed plate 20; during operation, the air discharged by the fan 12 enters the cover 10 through the air inlet 11, and part of the air enters above the fixed plate 20 to achieve the purpose of carrying the ground dust particles upward; another part of the air enters between the spiral plates 60 to form a spiral airflow, and the spiral airflow flows from the bottom of the spiral plate 60 along the spiral plate 60 to the spiral plate 60. At the top of the rotary plate 60, part of the spiral airflow is discharged from the air outlet 61 and merges with the air above the fixed plate 20 to achieve the purpose of carrying the ground dust particles upward; the other part of the spiral airflow flows out through the air vent 63 of the fixed plate 20 and the air vent 62 of the receiving plate 21, so that the airflow blows from the bottom of the receiving plate 21 to the top of the receiving plate 21, causing the material fragments on the upper surface of the receiving plate 21 to be lifted and bounced by the airflow, so that the scraper 23 can better scoop up the material fragments, assisting the scraper 23 in scooping up the material fragments.

[0035] In this embodiment, a plurality of baffle plates 64 are uniformly fixed on the upper surface of the fixed plate 20 along the circumferential direction. The baffle plates 64 are arranged radially inclined, and an air duct is formed between each baffle plate 64. The airflow entering the upper part of the fixed plate 20 enters the upper part of the receiving plate 21 through each air duct to form an upward spiral air. The spiral airflow coming out of the air outlet 61 merges with the spiral air, making the spiral air rotate with greater force and improving the efficiency of entraining dust particles.

[0036] In this embodiment, a separation disc 65 is provided above the internal space of the grinding cylinder 6. Several radial separation rods 66 are fixedly provided on the circumferential surface of the separation disc 65. A rotating shaft 67 is fixedly provided coaxially on the upper end surface of the separation disc 65. The rotating shaft 67 is fixedly provided with the output shaft of the top motor 68. The bottom end of the material pipe 7 is connected to the space above the separation disc 65. In use, the spiral air rises and carries dust particles in an attempt to enter the material pipe 7. However, the continuously rotating separation disc 65 and separation rods 66 driven by the top motor 68 block the spiral air, causing the larger material fragments carried in the spiral air to be blocked, lose speed, and fall back onto the receiving disc 21 for secondary grinding. The dust particles that pass smoothly through the separation rods 66 enter the inertial dust collector 8 through the material pipe 7 for gas and dust separation. The separation rods 66 cause unqualified material fragments to fall down for re-grinding, while qualified dust particles enter the inertial dust collector 8 for separation. The separated dust particles enter the mixing device 4 for mixing to prepare polymer concrete.

[0037] In this embodiment, the inertial dust collector 8 includes a separation cylinder 69 fixedly disposed at the end of the material pipe 7 away from the grinding cylinder 6. A baffle 70 is fixedly disposed on the inner top wall of the separation cylinder 69. A circular hole 71 is opened on the inner top wall of the separation cylinder 69. The material pipe 7 communicates with the interior of the separation cylinder 69. The circular hole 71 at the top of the separation cylinder 69 and the air intake of the fan 12 are connected by an air intake pipe 72. A discharge port 73 is opened at the bottom of the separation cylinder 69. In use, the rising airflow inside the grinding cylinder 6 enters the material pipe 7 and then enters the separation cylinder 69. The air entering the separation cylinder 69 blows directly onto the outer wall of the baffle 70, causing the dust particles in the airflow to fall and be discharged from the discharge port 73 to collect the dust particles. The air inside the separation cylinder 69 is drawn away by the fan 12 and discharged back into the cover 10 to achieve air circulation.

[0038] In this embodiment, the stirring device 4 is located below the separation cylinder 69. Dust particles falling from the discharge port 73 of the separation cylinder 69 are quantitatively fed into the stirring device 4 via the feeding device 74. The stirring device 4 is equipped with a dosing cup 75, through which quantitative amounts of slag, fly ash, aluminum powder, foam stabilizer, and water glass solution with a modulus of 1.2-1.5 are added for stirring and mixing reaction, generating a hydraulic hydration product with gelling effect. Then, the product is conveyed by a pushing device 76 (such as a screw conveyor). The feed sheet is pushed into the molding device 5 (e.g., mold 19) to produce granular aggregate or autoclaved aerated concrete blocks. The mold 19 for producing aggregate can be a mold plate with several grooves evenly opened on the upper surface of the mold plate. The mixed material is poured into each groove and left to stand. The height of the material entering the mold is 1 / 2 to 2 / 3 of the height of the mold 19. After covering with a film and standing for 0.5 to 1 hour, the concrete overflowing from the surface of the mold 19 is removed, the surface is smoothed, and after covering with a film and standing for 24 hours, the material is demolded. The particle size range of the waste brick micro powder-based artificial aggregate is below 0.15 mm.

[0039] The mold 19 for producing autoclaved aerated concrete (AAC) blocks includes a mold block with a straight groove 77 on its side. The mold block is placed on a workbench 78, and the straight groove 77 of the mold block and the workbench 78 form a channel. The pushing device 76 pushes the mixed concrete into the straight groove 77 and pushes it out of the mold 19 block to form a long rectangular object. The rectangular object is then cut to form individual AAC blocks. During curing, the blocks are left to stand and the surface is kept moist. The AAC blocks can harden slowly.

[0040] In this embodiment, the crushing device 1 is a jaw crusher and the conveying device 2 is a vertical bucket elevator.

[0041] The waste brick micropowder-based polymer concrete of the present invention comprises: 60-150 parts of cementitious material, 0.12-0.6 parts of aluminum powder, 0.06-0.45 parts of foam stabilizer, and 12-45 parts of alkali activator. The cementitious material includes one or more of 10-40 parts of slag and 0-20 parts of fly ash, and 60-90 parts of waste brick micropowder. The foam stabilizer comprises calcium stearate. The alkali activator is water glass prepared with sodium hydroxide, with a water glass modulus of 1.2-1.5. The water includes the water contained in the water glass solution and water added separately, and the mass ratio of water to cementitious material is 0.37-0.41. Waste brick powder contains amorphous SiO2 and Al2O3, giving it pozzolanic activity. Under the action of an alkaline activator, it can react with water to produce geopolymer concrete. Geopolymer concrete is a hydraulic hydration product with gelling properties, i.e., a cementitious material. In civil engineering materials, cementitious materials refer to materials that can bind granular or blocky materials into a whole through a series of physical and chemical changes. Waste brick powder is used as a cementitious material or admixture to replace cement. It reacts with water to produce hydrated calcium silicate gel and calcium hydroxide. Hydrated calcium silicate gel can bind aggregates to form a dense structure with a certain mechanical strength. Calcium hydroxide can react with the amorphous SiO2 and Al2O3 in waste brick powder to produce hydrated calcium silicate, hydrated calcium aluminate, or hydrated calcium aluminosilicate. Aluminum powder can achieve the porous effect of concrete to realize self-insulating performance and has lightweight characteristics. Therefore, the waste brick powder-based lightweight self-insulating concrete has both self-insulating and lightweight properties.

[0042] Waste brick micro-powder-based non-autoclaved lightweight self-insulating geopolymer concrete cubes have a compressive strength of 3.0-10.0 MPa, a density of 500-1000 kg / m3, a thermal conductivity of less than 0.18, and do not require autoclaving.

[0043] A method for preparing waste brick micropowder-based autoclaved lightweight self-insulating geopolymer concrete, characterized by the following steps: S1: preparing waste brick micropowder using a crushing device: first, the waste bricks are washed and dried; then, the waste bricks are crushed using a crushing device; S3. The waste brick fragments are conveyed into the grinding device by the conveying device, and the waste brick fragments are ground and dried by the grinding device to obtain waste brick powder with a particle size ≤0.15mm. S2: Mix solid raw materials using a mixing device: Take 10-40 parts of slag, 0-20 parts of fly ash or one or more, and 60-90 parts of waste brick powder by mass, add 0.06-0.45 parts of foam stabilizer and put them into the mixing device and mix evenly. S3: Add 12-45 parts of alkaline activator and stir at high speed for 2-3 minutes; S4: Mix 0.12-0.6 parts of aluminum powder with water, pour the mixture into a mixing device, and mix at high speed for 20-30 seconds to make a geopolymer concrete slurry; S5: The molding device shapes the geopolymer concrete slurry into the required shape; when producing aggregates: the slurry is poured into the mold, the height of the mold is 1 / 2-2 / 3 of the mold height, and it is covered and left to stand for 0.5-1 hour; when producing non-autoclaved aerated concrete blocks, the slurry is shaped into long cubic shapes and then cut into uniform blocks; it can also produce wall panel materials.

[0044] S6: Remove the concrete overflowing from the mold surface, smooth the surface, cover with a film, and let stand for 24 hours before demolding; S7: Curing of concrete requires keeping the surface moist at all times; the product will harden slowly.

Claims

1. A device for preparing waste brick micronized polymer concrete, characterized in that: It includes a crushing device, a grinding device, a conveying device, a mixing device, and a molding device; the crushing device is used to crush waste bricks into waste brick fragments, the grinding device is used to grind the waste brick fragments into waste brick powder, the two ends of the conveying device are respectively set to the discharge end of the crushing device and the feed end of the grinding device, and are used to convey the waste brick fragments, the mixing device is used to mix and react waste brick powder, slag, fly ash, aluminum powder, foam stabilizer and alkali activator in a set proportion to generate geopolymer concrete, and the molding device is used to shape the geopolymer concrete slurry.

2. The preparation apparatus according to claim 1, characterized in that: The grinding device includes a grinding cylinder whose top end is connected to an inertial dust collector, a feeding hopper on one side of the grinding cylinder, and a corresponding discharge end of the conveying device. A cover with an air inlet and a fan outlet is fixedly installed at the bottom end of the grinding cylinder. A vertical shaft coaxially connected to the cover is installed inside the cover. The bottom end of the vertical shaft is connected to a drive device and a perforated frame is fixedly installed at the top end. Several grinding rollers are evenly arranged along the circumference of the perforated frame. A grinding ring is fixedly installed on the inner wall of the cover, and a grinding gap is formed between the grinding rollers and the inner wall of the grinding ring.

3. The preparation apparatus according to claim 2, characterized in that: A fixed plate is fixedly installed inside the cover, and a receiving plate is fixedly installed on the upper end surface of the fixed plate. A rotating plate is fixedly installed on the vertical shaft. The rotating plate is located inside the receiving plate. Several scrapers are arranged on the rotating plate at an incline along the circumference. The bottom end of each scraper is in contact with the upper end surface of the receiving plate.

4. The preparation apparatus according to claim 3, characterized in that: The bottom surface of the shovel is fixedly equipped with a rotating shaft, and the upper end surface of the rotating disk is fixedly equipped with a mounting block. The upper end surface of the mounting block has a mounting groove perpendicular to the rotating shaft. The rotating shaft is rotatably connected to the mounting block. A symmetrical plane is opened on the rotating shaft located in the mounting groove. A compensation block is set in the mounting groove. One end of the compensation block is engaged with the plane of the rotating shaft. The other end of the compensation block has an elongated through groove. A pre-tightening bolt is threaded into the mounting block. The pre-tightening bolt is located in the elongated through groove. A pressure plate is sleeved on the pre-tightening bolt. A compensation spring is sleeved on the pre-tightening bolt between the pressure plate and the compensation block.

5. The preparation apparatus according to claim 4, characterized in that: The inner end of the rotating shaft is provided with an inner shaft through a ratchet mechanism. A cam mechanism is coaxially provided inside the grinding cylinder. The cam mechanism includes a cam and a push rod. The push rod is slidably provided in the vertical shaft in the up-down direction. A transmission device is provided between the bottom end of the push rod and the inner shaft. The cam is fixedly provided with the output end of the hydraulic telescopic rod. The hydraulic telescopic rod is fixedly provided with the grinding cylinder.

6. The preparation apparatus according to claim 5, characterized in that: The transmission device includes several transmission rods. A first bevel gear is fixedly installed at the outer end of the transmission rod, and a second bevel gear is fixedly installed at the inner end of the inner shaft. The transmission rods are located between two adjacent inner shafts and the first bevel gear meshes with the corresponding second bevel gear. Each transmission rod is rotatably connected to a rotating disk. A lever is fixedly installed radially on each transmission rod, and the inner end of each lever extends to below the bottom end of the top rod.

7. The preparation apparatus according to claim 6, characterized in that: The ratchet mechanism includes a ratchet and a pawl. A ratchet disc is fixedly mounted on the side of the ratchet away from the pivot. The side of the ratchet disc away from the ratchet is coaxially fixed with the inner pivot. A ratchet cover is rotatably connected to the side of the ratchet disc near the ratchet. The outer side of the ratchet cover is coaxially fixed with the pivot. The pawl is rotatably connected to the inner wall of the ratchet cover. A torsion spring is mounted on the pawl. One end of the torsion spring is fixedly connected to the ratchet cover, and the other end of the torsion spring is fixedly connected to the pawl. The torsion spring always drives the pawl to rotate counterclockwise, so that the front end of the pawl abuts against the ratchet.

8. The preparation apparatus according to claim 7, characterized in that: The vertical shaft includes an upper shaft and a lower shaft. The bottom end of the lower shaft is connected to the driving device. The push rod is slidably disposed inside the upper shaft in the vertical direction. The bottom end of the upper shaft is fixedly disposed to the rotating disk. The top end of the lower shaft is fixedly disposed to the rotating disk. Several return springs are fixedly disposed on the upper end surface of the lower shaft. The top end of each return spring is fixedly connected to the corresponding lever.

9. A method for preparing geopolymer concrete using the preparation apparatus according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1: Prepare waste brick powder using a crushing device; S3. Use a grinding device to grind and dry the waste brick fragments to obtain waste brick powder with a set particle size. S2: Mix solid raw materials using a mixing device: Take 10-40 parts of slag and / or 0-20 parts of fly ash, and 60-90 parts of waste brick powder by mass, add 0.06-0.45 parts of foam stabilizer and put them into the mixing device and mix evenly. S3: Add 12-45 parts of alkaline activator and stir for the set time; S4: Mix 0.12-0.6 parts of aluminum powder with water, pour the mixture into a mixing device and mix for a set time to prepare a geopolymer concrete slurry; S5: Using a molding device to shape geopolymer concrete slurry; S6: Remove the overflowing concrete from the surface of the molding device, smooth the surface, cover with a film, and let it stand before demolding; S7: Moisten the concrete for curing.

10. A brick micro-powder macropolymer concrete obtained using the preparation apparatus according to any one of claims 1 to 8, characterized in that: The product comprises 60-150 parts of cementitious material, 0.12-0.6 parts of aluminum powder, 0.06-0.45 parts of foam stabilizer, and 12-45 parts of alkali activator. The cementitious material includes one or more of 10-40 parts of slag and 0-20 parts of fly ash, and 60-90 parts of waste brick powder. The alkali activator is water glass prepared with sodium hydroxide, and the water glass modulus is 1.2-1.

5. The water includes the water contained in the water glass solution and water added separately, and the mass ratio of water to cementitious material is 0.37-0.41.

Images