Composite rapid-hardening roadbed reinforcing cementing material and preparation device

Abstract

The invention discloses a composite quick-setting roadbed reinforcing cementing material and a preparation device, and the composite quick-setting roadbed reinforcing cementing material comprises the following components in percentage by mass: 40-60% of sulphoaluminate cement, 5-10% of nano silicon dioxide, 10-20% of metakaolin, 0.1-0.5% of a retarder and 1-3% of a lithium salt activator. According to the composite quick-setting roadbed reinforcing cementing material and the preparation device, the sulphoaluminate cement and the metakaolin are mixed, then the nano silicon dioxide, the retarder and the lithium salt exciting agent form the solution through ultrasonic dispersion, and finally the mixed sulphoaluminate cement, the metakaolin and the mixed solution are mixed again, so that the composite quick-setting roadbed reinforcing cementing material is obtained. The raw materials are mixed to form the gel material, through the synergistic effect of the nano silicon dioxide, the sulphoaluminate cement and the metakaolin mixture, the coagulation speed of the gel material is increased, the strength of the gel material is enhanced, rapid repair of a road subgrade is achieved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of roadbed materials technology, specifically to composite quick-setting roadbed reinforcement cementitious materials and their preparation apparatus. Background Technology

[0002] Roadbed repair is an engineering project that maintains and repairs the roadbed of highways or railways. It aims to solve problems such as roadbed settlement, cracks, and poor drainage, and to ensure the stability and safety of the road.

[0003] Existing methods for roadbed repair involve using traditional magnesium phosphate cement. However, the use of magnesium phosphate cement carries the risk of heavy metal leaching, increasing safety hazards. Furthermore, in the case of roadbed repair in high-altitude and cold regions, the long setting time of traditional cement leads to extended repair times and increased time costs. Summary of the Invention

[0004] The purpose of this invention is to provide a composite quick-setting roadbed reinforcement cementitious material and preparation device to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a composite quick-setting roadbed reinforcement cementitious material, comprising, by mass percentage, 40-60% sulfoaluminate cement, 5-10% nano silica, 10-20% metakaolin, 0.1-0.5% retarder, and 1-3% lithium salt activator.

[0006] As a further description of the above technical solution:

[0007] The retarder has an initial setting time of 8-15 minutes and a final setting time of no more than 30 minutes.

[0008] As a further description of the above technical solution:

[0009] The retarder is a hydroxycarboxylic acid retarder.

[0010] As a further description of the above technical solution:

[0011] A preparation apparatus for composite quick-setting roadbed reinforcement cementitious material, based on the composite quick-setting roadbed reinforcement cementitious material described above, includes a mixer for mixing the above material, the mixer being mounted on a base, and a sealing plate being rotatably provided at the feed inlet of the mixer;

[0012] It also includes a batching component for weighing and balancing raw materials. The batching component includes a rectangular frame, in which a balance bar is slidably disposed. Both ends of the balance bar are rotatably connected to a batching platform, and a locking plate is provided at the bottom of the batching platform.

[0013] It also includes an adjustment component, which adjusts the position of the rectangular frame on the balance bar so that the distance between the two batching stations and the rectangular frame is not the same, and adjusts the position of the rectangular frame on the balance bar according to the batching ratio of the two batching stations.

[0014] As a further description of the above technical solution:

[0015] The balancing assembly also includes a support rod fixed to the base, and a sliding rod is slidably disposed inside the support rod, the sliding rod being rotatably connected to the rectangular frame.

[0016] As a further description of the above technical solution:

[0017] The adjustment assembly includes a bolt threaded into the rectangular frame, the bolt being in movable contact with the balance bar, the balance bar having multiple ratio numbers on its surface, and the rectangular frame having an observation hole on its surface.

[0018] As a further description of the above technical solution:

[0019] After the batching platform is leveled, the balance bar is in a horizontal state. Then, the unlocking device is triggered to unlock the locking plate and sealing plate on the same side, and the batched raw materials are transported into the mixer to complete the mixing.

[0020] As a further description of the above technical solution:

[0021] The unlocking component includes a limiting plate slidably disposed on the base, a first driving tube and a second driving tube fixedly connected to the limiting plate, a first connecting rod fixedly connected to the locking plate, the first connecting rod extending to the outside of the batching table, and a second connecting rod fixedly connected to the sealing plate, the second connecting rod extending to the outside of the mixer.

[0022] As a further description of the above technical solution:

[0023] The first connecting rod has a first spiral groove on its outer side, and a first guide block that is slidably connected to the first spiral groove is fixedly connected inside the first driving tube. The second connecting rod has a second spiral groove on its outer side, and a second guide block that is slidably connected to the second spiral groove is fixedly connected inside the second driving tube.

[0024] As a further description of the above technical solution:

[0025] A baffle is fixedly connected to the outside of the sliding rod, the end of the sliding rod is threaded, and a nut that is threadedly connected to the sliding rod is provided on the outside of the sliding rod.

[0026] In the above technical solution, the composite quick-setting roadbed reinforcement cementitious material and preparation device provided by the present invention have the following beneficial effects:

[0027] This invention involves mixing sulfoaluminate cement and metakaolin, then dispersing nano-silica with ultrasonically, and forming a solution with a retarder and lithium salt activator. Finally, the mixed sulfoaluminate cement, metakaolin, and the resulting solution are mixed again to form a gel material. Through the synergistic effect of nano-silica, sulfoaluminate cement, and metakaolin mixture, the setting speed and strength of the gel material are improved, enabling rapid road repair.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0029] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0031] Figure 1 This is a three-dimensional structural schematic diagram provided for an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the rear view structure provided in an embodiment of the present invention;

[0033] Figure 3 Provided for embodiments of the present invention Figure 2 The enlarged structural diagram at point A is shown below;

[0034] Figure 4 A three-dimensional structural schematic diagram of the balance bar provided in an embodiment of the present invention;

[0035] Figure 5 A partial structural schematic diagram of the unlocking component provided in an embodiment of the present invention;

[0036] Figure 6 Provided for embodiments of the present invention Figure 5 The enlarged structural diagram at point B is shown below;

[0037] Figure 7 Provided for embodiments of the present invention Figure 5 The enlarged structural diagram at point C is shown below;

[0038] Figure 8 A three-dimensional structural schematic diagram of the sealing plate provided in an embodiment of the present invention;

[0039] Figure 9 This is a three-dimensional structural diagram of the batching station provided in an embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Mixer; 11. Base; 12. Sealing plate; 21. Rectangular frame; 22. Balance bar; 23. Batching platform; 24. Locking plate; 25. Support plate; 26. Sliding rod; 27. Baffle; 28. Nut; 29. ​​Thread; 31. Bolt; 32. Proportioning number; 33. Observation hole; 41. Limiting plate; 42. First drive tube; 43. Second drive tube; 44. First connecting rod; 45. Second connecting rod; 46. First spiral groove; 47. First guide block; 48. Second spiral groove; 49. Second guide block. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0043] Please see Figures 1-9 The composite quick-setting roadbed reinforcement cementitious material provided in this embodiment includes, by mass percentage, 40-60% sulfoaluminate cement, 5-10% nano silica, 10-20% metakaolin, 0.1-0.5% retarder, and 1-3% lithium salt activator.

[0044] In a further embodiment of the present invention, the initial setting time of the retarder is controlled at 8-15 minutes and the final setting time is not more than 30 minutes.

[0045] Furthermore, the retarder is a hydroxycarboxylic acid retarder.

[0046] In a further embodiment of the present invention, the preparation device for composite quick-setting roadbed reinforcement cementitious material, based on any of the above-mentioned composite quick-setting roadbed reinforcement cementitious materials, includes a mixer 1 for mixing the above-mentioned material. The mixer 1 is mounted on a base 11. A sealing plate 12 is rotatably arranged at the feed inlet of the mixer 1. Two sealing plates 12 are provided at each feed inlet of the mixer, and the two sealing plates 12 are matched to seal the feed inlet. The device also includes a batching component for weighing and balancing the raw materials. The batching component includes a rectangular frame 21, and a balance bar 22 is slidably arranged inside the rectangular frame 21. Both ends of the balance bar 22 are rotatably connected to a batching platform 23, and a locking plate 2 is provided at the bottom of the batching platform 23. 4; It also includes an adjustment component, which adjusts the position of the rectangular frame 21 on the balance bar 22 so that the distance between the two batching platforms 23 and the rectangular frame 21 is not the same. According to the batching ratio of the two batching platforms 23, the position of the rectangular frame 21 on the balance bar 22 is adjusted. By setting the position of the rectangular frame 21 on the balance bar 22 according to the required batching weight ratio, the weighed raw material is put into one side and another raw material is added to the other side. When the balance bar 22 is in a horizontal state, the batching of raw materials is completed. Then, the raw materials are injected into the mixer 1 through the unlocking component. When multiple raw materials need to be batched, different weight ratios are adjusted and the raw materials are automatically injected into the mixer after balancing. It is convenient to operate, the result is simple, and there is no need for multiple weighings.

[0047] In the embodiments provided by the present invention, the balancing assembly further includes a support rod fixed on the base 11, and a sliding rod 26 is slidably disposed inside the support rod, and the sliding rod 26 is rotatably connected to the rectangular frame 21.

[0048] In this invention, after the batching platform 23 is leveled, the balance bar 22 is in a horizontal state. Then, the unlocking component is triggered to unlock the locking plate 24 and the sealing plate 12 on the same side, and the batched raw materials are transported into the mixer 1 to complete the mixing.

[0049] Furthermore, the unlocking component includes a limiting plate 41 slidably disposed on the base 11. The limiting plate 41 is connected to the base 11 by an electric telescopic rod. The movement of the limiting plate 41 is driven by the electric telescopic rod, thereby driving the opening and closing of the sealing plate 12 and the locking plate 24. A first driving tube 42 and a second driving tube 43 are fixedly connected to the limiting plate 41. A first connecting rod 44 is fixedly connected to the locking plate 24, extending to the outside of the batching table 23. A second connecting rod 45 is fixedly connected to the sealing plate 12, extending to the outside of the mixer 1.

[0050] Furthermore, the first connecting rod 44 has a first spiral groove 46 on its outer side, and the first driving tube 42 has a first guide block 47 that is slidably connected to the first spiral groove 46. The second connecting rod 45 has a second spiral groove 48 on its outer side, and the second driving tube 43 has a second guide block 49 that is slidably connected to the second spiral groove 48.

[0051] Specifically, a baffle 27 is fixedly connected to the outside of the sliding rod 26, and a thread 29 is provided at the end of the sliding rod 26. A nut 28 is provided on the outside of the sliding rod 26 and threadedly connected to the thread 29. By rotating the nut 28 on the thread 29, the connection between the sliding rod 26 and the support plate 25 is adjusted. When the nut 28 rotates and abuts against the support plate 25, it limits the position of the rectangular frame 21.

[0052] In a further embodiment of the present invention, the adjusting component includes a bolt 31 threadedly connected to the rectangular frame 21. The bolt 31 is in movable contact with the balance bar 22. The surface of the balance bar 22 is provided with a plurality of proportion numbers 32. The distance between the rectangular frame 21 is adjusted according to the numbers on the balance bar 22, thereby controlling the proportion of the two batching stations 23 and achieving automatic balancing according to different proportions. The surface of the rectangular frame 21 is provided with an observation hole 33 for observing the numbers on the balance bar 22 that are obscured by the rectangular frame 21, so as to observe the data of the rectangular frame 21 moving on the balance bar 22 as needed.

[0053] Working principle: Adjust the position of the rectangular frame 21 on the balance bar 22 according to the required ratio. Observe the ratio number 32 through the observation hole 33. When the ratio number 32 is the specified number, rotate the bolt 31 to abut against the balance bar 22 so that the rectangular frame 21 and the balance bar 22 are fixed to each other. Then rotate the nut 28 on the thread 29 to move the nut 28. The sliding rod 26 is fixed in the support plate 25 by the baffle 27.

[0054] Place the two raw materials to be mixed on the mixing platform 23. When the balance bar 22 drives the two mixing platforms 23 to a horizontal state, the mixing of the raw materials is completed.

[0055] After the proportioning is completed, the limit plate 41 is moved by driving the first drive tube 42 and the second drive tube 43 to move the first connecting rod 44 and the second connecting rod 45, thereby causing the first guide block 47 to move in the first spiral groove 46 and the second guide block 49 to move in the second spiral groove 48, driving the first connecting rod 44 and the second connecting rod 45 to rotate, thereby driving the sealing plate 12 and the locking plate 24 to rotate to a vertical state, and conveying the raw materials prepared on the batching table 23 to the mixer 1;

[0056] After the conveying is completed, the drive limit plate 41 moves away from the batching table 23, so that the first drive tube 42 and the second drive tube 43 move out of the first connecting rod 44 and the second connecting rod 45, thereby driving the locking plate 24 and the sealing plate 12 to rotate to a horizontal state, closing the batching table 23 and the mixer, and completing the mixing of raw materials by rotating the mixer.

[0057] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A composite quick-setting roadbed reinforcement cementitious material, characterized by the following characteristics, based on mass percentage: It includes 40-60% sulfoaluminate cement, 5-10% nano silica, 10-20% metakaolin, 0.1-0.5% retarder, and 1-3% lithium salt activator.

2. The composite quick-setting roadbed reinforcement cementitious material according to claim 1, characterized in that, The retarder has an initial setting time of 8-15 minutes and a final setting time of no more than 30 minutes.

3. The composite quick-setting roadbed reinforcement cementitious material according to claim 1, characterized in that, The retarder is a hydroxycarboxylic acid retarder.

4. A preparation apparatus for composite quick-setting roadbed reinforcement cementitious material, based on the composite quick-setting roadbed reinforcement cementitious material according to any one of claims 1-3, characterized in that, Includes a mixer (1) for mixing the above materials, the mixer (1) is mounted on a base (11), and a sealing plate (12) is rotatably provided at the feed inlet of the mixer (1). It also includes a batching component, which is used to weigh and balance the raw materials. The batching component includes a rectangular frame (21), a balance bar (22) is slidably arranged inside the rectangular frame (21), and both ends of the balance bar (22) are rotatably connected to a batching table (23). A locking plate (24) is provided at the bottom of the batching table (23). It also includes an adjustment component, which adjusts the position of the rectangular frame (21) on the balance bar (22) so that the distance between the two batching stations (23) and the rectangular frame (21) is not consistent, and adjusts the position of the rectangular frame (21) on the balance bar (22) according to the batching ratio of the two batching stations (23).

5. The apparatus for preparing composite rapid-setting roadbed reinforcement cementitious material according to claim 4, characterized in that, The balancing assembly also includes a support rod fixed to the base (11), and a sliding rod (26) is slidably disposed inside the support rod. The sliding rod (26) is rotatably connected to the rectangular frame (21).

6. The preparation apparatus for the composite rapid-setting roadbed reinforcement cementitious material according to claim 4, characterized in that, The adjustment component includes a bolt (31) threaded into the rectangular frame (21), the bolt (31) being in contact with the balance bar (22), the balance bar (22) having a plurality of ratio numbers (32) on its surface, and the rectangular frame (21) having an observation hole (33) on its surface.

7. The preparation apparatus for the composite rapid-setting roadbed reinforcement cementitious material according to claim 4, characterized in that, After the batching station (23) is leveled, the balance bar (22) is in a horizontal state. Then the unlocking device is triggered to unlock the locking plate (24) and sealing plate (12) on the same side, and the batched raw materials are transported into the mixer (1) to complete the mixing.

8. The apparatus for preparing composite quick-setting roadbed reinforcement cementitious material according to claim 7, characterized in that, The unlocking component includes a limiting plate (41) slidably disposed on the base (11), a first driving tube (42) and a second driving tube (43) fixedly connected to the limiting plate (41), a first connecting rod (44) fixedly connected to the locking plate (24), the first connecting rod (44) extending to the outside of the batching table (23), and a second connecting rod (45) fixedly connected to the sealing plate (12), the second connecting rod (45) extending to the outside of the mixer (1).

9. The apparatus for preparing composite quick-setting roadbed reinforcement cementitious material according to claim 8, characterized in that, The first connecting rod (44) has a first spiral groove (46) on its outside, and the first driving tube (42) has a first guide block (47) that is slidably connected to the first spiral groove (46) in its inside. The second connecting rod (45) has a second spiral groove (48) on its outside, and the second driving tube (43) has a second guide block (49) that is slidably connected to the second spiral groove (48) in its inside.

10. The apparatus for preparing composite rapid-setting roadbed reinforcement cementitious material according to claim 4, characterized in that, A baffle (27) is fixedly connected to the outside of the sliding rod (26), and a thread (29) is provided at the end of the sliding rod (26), and a nut (28) is provided on the outside of the sliding rod (26) and threadedly connected to the thread (29).

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