Recycled concrete composition with high compressive strength and production equipment thereof

Abstract

The invention discloses a recycled concrete composition with high compressive strength and production equipment thereof, and relates to the field of recycled concrete, and the concrete composition comprises cement, recycled aggregate, a superplasticizer and nano silicon dioxide. After the cement and the recycled aggregate are mixed, the high-efficiency water reducing agent and the nano silicon dioxide are added into the composition of the cement and the recycled aggregate, so that the concrete can be ensured to have enough compactness during pouring, the microstructure of the recycled concrete is improved, and the stability and the reliability of the recycled concrete in an extreme environment are improved.

Description

Technical Field

[0001] The present application relates to the field of recycled concrete, and in particular to a recycled concrete composition with high compressive strength and a production device thereof. Background Art

[0002] Recycled aggregate refers to granular materials obtained after crushing, screening, cleaning and other processing of waste concrete, bricks and other construction waste. These materials can be used as aggregates in new concrete, mortar or other building materials. The use of recycled aggregate can reduce the exploitation of natural resources, reduce the impact of construction waste on the environment, and help achieve sustainable development of the construction industry.

[0003] Recycled concrete composition refers to concrete made from dismantled concrete of old buildings or structures that is crushed and graded into coarse and fine aggregates to replace part of the sand and gravel in the concrete. This type of concrete is also called recycled aggregate concrete. Recycled concrete uses crushed waste concrete as aggregate. Compared with natural aggregate, recycled aggregate has lower strength, higher water absorption, and higher surface roughness. Therefore, the basic properties of recycled concrete and natural aggregate concrete are different.

[0004] In order to improve the strength of recycled concrete compositions, currently commonly used methods include pre-wetting method, additive modification method and surface coating method, etc., which aim to reduce the water absorption of recycled aggregates. However, these methods often increase the difficulty of construction, prolong the operation cycle, or limit the possibility of practical application due to rising costs. Summary of the invention

[0005] The purpose of the present application is to solve the problem that the currently commonly used methods proposed in the above-mentioned background technology include pre-wetting method, additive modification method and surface coating method, etc., which aim to reduce the water absorption of recycled aggregates, but these methods often increase the difficulty of construction, prolong the operation cycle, or limit the possibility of practical application due to rising costs. The present application provides a recycled concrete composition with high compressive strength and its production equipment.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A recycled concrete composition with high compressive strength comprises cement, recycled aggregate, high-efficiency water reducing agent and nano silicon dioxide.

[0007] By adopting the above technical solution, after mixing cement and recycled aggregate, a high-efficiency water reducing agent and nano-silicon dioxide are added to the composition of cement and recycled aggregate, thereby ensuring that the concrete has sufficient density during pouring, improving the microstructure of the recycled concrete, and increasing its stability and reliability in extreme environments.

[0008] Furthermore, the cement content accounts for 40% of the total mass, the recycled aggregate content accounts for 60% of the total mass, the high-efficiency water reducer accounts for 2% of the cement mass, the high-efficiency water reducer is based on a polycarboxylic acid water reducer, and the nano-silica accounts for 2% to 3% of the total mass.

[0009] By adopting the above technical solution, the proportion and type of various compositions are strictly controlled, and the ratio of cement to recycled aggregate is optimized, so as to ensure the workability of concrete, strengthen the microstructure, and build a stable bonding system.

[0010] A production device for a recycled concrete composition with high compressive strength comprises a mixing drum, a support seat is fixed on the mixing drum, an upper hopper is fixed on one side of the mixing drum, the upper hopper is communicated with the mixing drum, a discharge pipe is fixed at the bottom of the mixing drum, the discharge pipe is communicated with the mixing drum, a high-efficiency mixing mechanism is arranged in the mixing drum, and an auxiliary mixing mechanism is arranged in the mixing drum.

[0011] By adopting the above technical scheme, the composition in the mixing drum is fully stirred by using a high-efficiency stirring mechanism, and a high-efficiency water reducing agent and nano-silicon dioxide are added into the mixing drum during stirring, and the composition to which the high-efficiency water reducing agent and nano-silicon dioxide are added is fully stirred by using the high-efficiency stirring mechanism. While the high-efficiency stirring mechanism is efficiently stirring the composition in the mixing drum, the high-efficiency stirring mechanism drives the auxiliary stirring mechanism, and the auxiliary stirring mechanism and the high-efficiency stirring mechanism simultaneously efficiently stir the composition in the mixing drum, thereby enabling various compositions added into the mixing drum to be efficiently stirred, enabling the high-efficiency water reducing agent and nano-silicon dioxide to be fully mixed with cement and recycled aggregate, thereby improving the mixing efficiency of the composition and reducing the time required for complete mixing.

[0012] Furthermore, the high-efficiency stirring mechanism includes a support frame fixed on the stirring drum, a rotating shaft 1 is rotatably connected inside the stirring drum, one end of the rotating shaft 1 passes through the stirring drum, a driving motor is fixed on the support frame, the output end of the driving motor passes through the support frame and is fixedly connected to the rotating shaft 1, a plurality of evenly distributed stirring rods 1 are fixed on the rotating shaft 1, and a flipping assembly is provided on the rotating shaft 1.

[0013] By adopting the above technical solution, the driving motor on the support frame drives the rotating shaft 1 to rotate, and the rotating shaft 1 drives the stirring rod 1, and the stirring rod 1 performs preliminary horizontal mixing and stirring on the composition in the mixing drum. At the same time, the rotating shaft 1 drives the flipping component to allow the composition to be mixed and stirred vertically, so that various compositions added to the mixing drum can be efficiently stirred, and the high-efficiency water reducing agent and nano-silicon dioxide can be fully mixed with cement and recycled aggregate, thereby improving the mixing efficiency of the composition.

[0014] Furthermore, the flipping assembly includes a flipping auger fixed on a rotating shaft, and a flipping inclined plate is fixed to the end of the stirring rod away from the rotating shaft. The inclination direction of the flipping inclined plate is opposite to the direction of the flipping auger, and the flipping inclined plate is in conflict with the inner wall of the mixing drum.

[0015] By adopting the above technical solution, when the rotating shaft drives the flipping auger to rotate, the flipping auger flips the concrete composition at the bottom of the mixing drum from the bottom to the top, and the flipping inclined plate scrapes the concrete composition on the inner wall of the mixing drum while moving the concrete composition above the mixing drum to the bottom of the mixing drum, so that the concrete composition in the mixing drum can be flipped up and down while being horizontally stirred, thereby further improving the mixing efficiency of the concrete composition and improving the mixing effect of various compositions.

[0016] Furthermore, the auxiliary stirring mechanism includes two rotating shafts 2 symmetrically arranged on both sides of the rotating shaft 1, the rotating shaft 2 passes through the corresponding stirring rod 1 and is rotatably connected to the stirring rod 1, a plurality of stirring blades are fixed on the rotating shaft 2, the stirring blades are inclined, and the inclination angle of the stirring blades is opposite to the inclination angle of the flipping auger, one end of the two rotating shafts 2 passes through the mixing drum, and a synchronous moving component is arranged between the two rotating shafts 2 and the rotating shaft 1.

[0017] By adopting the above technical solution, the rotating shaft 1 drives the synchronous moving component, and the synchronous moving component drives the rotating shaft 2 to rotate around the rotating shaft 1. At the same time, the synchronous component drives the rotating shaft 2 to rotate, so that the rotating shaft 2 drives the stirring blades to further stir the concrete composition in the mixing drum. When the rotating shaft 2 drives the stirring blades to rotate, the stirring blades push the concrete composition to the bottom of the mixing drum, thereby further improving the mixing efficiency of the concrete composition in the mixing drum.

[0018] Furthermore, the synchronous moving component includes a gear ring arranged between the support frame and the mixing drum, the gear ring is fixedly connected to the mixing drum, two symmetrical gears are meshedly connected inside the gear ring, the two gears are fixedly connected to the corresponding rotating shaft two, and two symmetrical connecting rods are fixed on the rotating shaft one, and the end of the connecting rod away from the rotating shaft one is rotatably connected to the corresponding rotating shaft two.

[0019] By adopting the above technical solution, the connecting rod drives the rotating shaft 2, so that the rotating shaft 2 rotates around the rotating shaft 1. At the same time, the rotating shaft 2 drives the gear, so that the gear drives the rotating shaft 2 to rotate, so that the rotating shaft 2 can rotate around the rotating shaft 1 and the rotating shaft 2 can rotate itself.

[0020] Furthermore, a support ring is rotatably connected to the mixing drum, the support ring passes through the mixing drum, and the two rotating shafts pass through the support ring and are rotatably connected to the support ring.

[0021] By adopting the above technical solution, the second rotating shaft drives the support ring to rotate on the mixing drum, thereby reducing the possibility of the second rotating shaft needing to reserve a penetrating activity space on the mixing drum when moving.

[0022] In summary, the present application includes at least one of the following beneficial effects: 1. In the present application, after mixing cement and recycled aggregate, a high-efficiency water reducing agent is added to the composition of cement and recycled aggregate, and the viscosity and viscosity of the recycled concrete are reduced by the high-efficiency water reducing agent. The high-efficiency water reducing agent improves the fluidity of the recycled concrete by reducing internal friction, making it easier to flow and fill gaps. When mixing cement and recycled aggregate, nano-silicon dioxide is added, and the nano-silicon dioxide fills the gaps in the recycled aggregate to form a dense microstructure, thereby achieving the purpose of ensuring that the concrete has sufficient density during pouring, improving the microstructure of the recycled concrete, and increasing its stability and reliability in extreme environments.

[0023] 2. In the present application, various concrete compositions are added into a mixing drum, and a driving motor on a supporting frame is used to drive a rotating shaft 1 to rotate, and the rotating shaft 1 drives a stirring rod 1, and the stirring rod 1 performs preliminary horizontal mixing and stirring on the compositions in the mixing drum. When the rotating shaft 1 rotates, the rotating shaft 1 drives a flipping auger to rotate, and the flipping auger flips the concrete composition at the bottom of the mixing drum from the bottom to the top. At the same time, the rotating shaft 1 drives the stirring rod 1, and the stirring rod 1 drives a flipping inclined plate, and the flipping inclined plate moves along the inner wall of the mixing drum, and the flipping inclined plate scrapes the concrete composition on the inner wall of the mixing drum. At the same time, the inclined surface of the flipping inclined plate is used to move the concrete composition above the mixing drum to the bottom of the mixing drum, so that the concrete composition in the mixing drum can be stirred simultaneously in both horizontal and vertical directions, thereby achieving the purpose of enabling various compositions added into the mixing drum to be efficiently stirred, enabling high-efficiency water reducing agent and nano-silicon dioxide to be fully mixed with cement and recycled aggregate, improving the mixing efficiency of the compositions, and reducing the time required for complete mixing.

[0024] 3. In the present application, while the rotating shaft 1 rotates, the rotating shaft 1 drives the connecting rod, and the connecting rod drives the rotating shaft 2, so that the rotating shaft 2 rotates around the rotating shaft 1 under the support of the support ring, and at the same time, the rotating shaft 2 drives the gear, so that the gear moves along the gear ring and rotates on the gear ring. While the gear rotates, the gear drives the rotating shaft 2 to rotate, and the rotating shaft 2 drives the stirring blades to further stir the concrete composition in the mixing drum. When the rotating shaft 2 drives the stirring blades to rotate, the stirring blades push the concrete composition to the bottom of the mixing drum, thereby achieving the purpose of further improving the mixing efficiency of the concrete composition in the mixing drum and reducing the mixing time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a first three-dimensional structural schematic diagram of a production device for a recycled concrete composition in the present application; Figure 2 is a schematic cross-sectional structure diagram of a production device for a recycled concrete composition in the present application; Figure 3 is a schematic diagram of the internal structure of a production device for a recycled concrete composition in the present application; Figure 4 This application Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 This application Figure 3 Enlarged schematic diagram of point B in the middle.

[0026] Description of reference numerals: 1. Mixing drum; 2. Support seat; 3. Upper hopper; 4. Discharge pipe; 5. High-efficiency mixing mechanism; 51. Rotating shaft one; 52. Mixing rod one; 53. Driving motor; 54. Flipping assembly; 541. Flipping auger; 542. Flipping inclined plate; 55. Support frame; 6. Auxiliary mixing mechanism; 61. Rotating shaft two; 62. Mixing blade; 63. Synchronous moving assembly; 631. Gear ring; 632. Gear; 633. Connecting rod; 634. Support ring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 —5 Further details of this application are provided.

[0028] The embodiments of the present application disclose a recycled concrete composition with high compressive strength and a production device thereof.

[0029] A recycled concrete composition with high compressive strength, the concrete composition includes cement, recycled aggregate, high-efficiency water reducing agent, and nano-silicon dioxide. After the cement and recycled aggregate are mixed, the high-efficiency water reducing agent is added to the composition of cement and recycled aggregate, and the high-efficiency water reducing agent is used to reduce the viscosity and viscosity of the recycled concrete, so that the recycled concrete is easier to flow and lay. The high-efficiency water reducing agent improves the fluidity of the recycled concrete by reducing internal friction, making it easier to flow and fill gaps. When the cement and recycled aggregate are mixed, nano-silicon dioxide is added, and the nano-silicon dioxide fills the gaps of the recycled aggregate, thereby ensuring that the concrete has sufficient density during pouring, improving the microstructure of the recycled concrete, and increasing its stability and reliability in extreme environments.

[0030] The cement content accounts for 40% of the total volume, the recycled aggregate content accounts for 60% of the total volume, the high-efficiency water reducer accounts for 2% of the cement mass, and the high-efficiency water reducer is based on polycarboxylic acid water reducer, and nano-silica accounts for 2% to 3% of the total volume. By strictly controlling the proportion and type of various compositions of recycled aggregates when proportioning, the ratio of cement to recycled aggregates is optimized, thereby ensuring the workability of concrete, strengthening the microstructure, and building a stable bonding system.

[0031] Reference Figure 1 , Figure 2 and Figure 3 , including a mixing drum 1, a support base 2 is fixed on the mixing drum 1, an upper hopper 3 is fixed on one side of the mixing drum 1, the upper hopper 3 is communicated with the mixing drum 1, a discharge pipe 4 is fixed at the bottom of the mixing drum 1, the discharge pipe 4 is communicated with the mixing drum 1, a high-efficiency mixing mechanism 5 is arranged in the mixing drum 1, and an auxiliary mixing mechanism 6 is arranged in the mixing drum 1.

[0032] When it is necessary to mix various compositions of recycled concrete, firstly, cement is fed into the mixing drum 1 from the upper hopper 3 according to a certain ratio, and then recycled aggregate is fed into the mixing drum 1 from the upper hopper 3 according to a certain ratio, and then the composition in the mixing drum 1 is fully stirred by the high-efficiency stirring mechanism 5, and high-efficiency water reducing agent and nano-silicon dioxide are added into the mixing drum 1 during stirring, and the composition with high-efficiency water reducing agent and nano-silicon dioxide added is fully stirred by the high-efficiency stirring mechanism 5, and while the high-efficiency stirring mechanism 5 is stirring the composition in the mixing drum 1 efficiently, the high-efficiency stirring mechanism 5 drives the auxiliary stirring mechanism 6, and the auxiliary stirring machine The high-efficiency stirring mechanism 6 and the high-efficiency stirring mechanism 5 simultaneously stir the composition in the stirring drum 1 with high efficiency. By adding the composition such as cement, recycled aggregate, high-efficiency water reducing agent and nano silicon dioxide into the stirring drum 1, the high-efficiency stirring mechanism 5 is used to stir the composition in the stirring drum 1 with high efficiency. While the high-efficiency stirring mechanism 5 is stirring, the auxiliary stirring mechanism 6 is driven, and the auxiliary stirring mechanism 6 further stirs the composition in the stirring drum 1, so that the various compositions added into the stirring drum 1 can be stirred with high efficiency, the high-efficiency water reducing agent and nano silicon dioxide can be fully mixed with cement and recycled aggregate, the mixing efficiency of the composition is improved, and the time required for complete mixing is reduced.

[0033] Reference Figure 2 , Figure 3 and Figure 4 The high-efficiency stirring mechanism 5 includes a support frame 55 fixed on the stirring drum 1, a rotating shaft 51 is rotatably connected in the stirring drum 1, one end of the rotating shaft 51 passes through the stirring drum 1, a driving motor 53 is fixed on the support frame 55, the output end of the driving motor 53 passes through the support frame 55 and is fixedly connected to the rotating shaft 51, a plurality of evenly distributed stirring rods 52 are fixed on the rotating shaft 51, and a flipping component 54 is arranged on the rotating shaft 51.

[0034] When the various compositions in the mixing drum 1 are stirred, the driving motor 53 on the supporting frame 55 is used to drive the rotating shaft 51 to rotate, and the rotating shaft 51 drives the stirring rod 52, and the stirring rod 52 performs preliminary horizontal mixing and stirring on the compositions in the mixing drum 1, and at the same time, the rotating shaft 51 drives the flipping assembly 54, so that the compositions can be vertically mixed and stirred, and the compositions in the mixing drum 1 can be flipped up and down. By using the driving motor 53 to drive the rotating shaft 51, the rotating shaft 51 drives the stirring rod 52 to stir the compositions in the mixing drum 1 horizontally, and at the same time drives the flipping assembly 54, so that the flipping assembly 54 flips the compositions up and down, the various compositions added to the mixing drum 1 can be stirred efficiently, the high-efficiency water reducing agent and nano-silicon dioxide can be fully mixed with cement and recycled aggregate, and the mixing efficiency of the compositions is improved.

[0035] Reference Figure 1 and Figure 3 The flipping assembly 54 includes a flipping auger 541 fixed on the rotating shaft 51, and a flipping inclined plate 542 is fixed to the end of the stirring rod 52 away from the rotating shaft 51. The inclination direction of the flipping inclined plate 542 is opposite to the direction of the flipping auger 541, and the flipping inclined plate 542 conflicts with the inner wall of the mixing drum 1.

[0036] When the rotating shaft 51 rotates, the rotating shaft 51 drives the flipping auger 541. When the flipping auger 541 rotates, the flipping auger 541 flips the concrete composition at the bottom of the mixing drum 1 from the bottom to the top. At the same time, the rotating shaft 51 drives the stirring rod 52, and the stirring rod 52 drives the flipping inclined plate 542. The flipping inclined plate 542 moves along the inner wall of the mixing drum 1, so that the flipping inclined plate 542 scrapes the concrete composition on the inner wall of the mixing drum 1. At the same time, the concrete composition above the mixing drum 1 is moved to the bottom of the mixing drum 1 by using the inclined surface of the flipping inclined plate 542. When the rotating shaft 51 drives the stirring rod 52 to stir the concrete composition, the rotating shaft 51 drives the flipping auger 541, and the stirring rod 52 drives the flipping inclined plate 542. Therefore, the concrete composition in the mixing drum 1 can be flipped up and down while being horizontally stirred, thereby further improving the mixing efficiency of the concrete composition and improving the mixing effect of various compositions.

[0037] Reference Figure 3 , Figure 4 and Figure 5 The auxiliary stirring mechanism 6 includes two rotating shafts 61 symmetrically arranged on both sides of the rotating shaft 51. The rotating shaft 61 passes through the corresponding stirring rod 52 and is rotatably connected to the stirring rod 52. A plurality of stirring blades 62 are fixed on the rotating shaft 61. The stirring blades 62 are inclined. The inclination angle of the stirring blades 62 is opposite to the inclination angle of the flipping auger 541. One end of the two rotating shafts 61 passes through the mixing drum 1, and a synchronous moving component 63 is arranged between the two rotating shafts 61 and the rotating shaft 51.

[0038] While the rotating shaft 1 51 rotates, the rotating shaft 1 51 drives the synchronous moving component 63, and the synchronous moving component 63 drives the rotating shaft 2 61 to rotate around the rotating shaft 1 51. At the same time, the synchronous component is used to drive the rotating shaft 2 61 to rotate, so that the rotating shaft 2 61 drives the stirring blade 62 to further stir the concrete composition in the mixing drum 1. The stirring blade 62 is tilted on the rotating shaft 2 61, and the tilting direction of the stirring blade 62 is opposite to the tilting direction of the flip auger 541. When the rotating shaft 2 61 drives the stirring blade 62 to rotate, the stirring blade 62 pushes the concrete composition to the bottom of the mixing drum 1, and the concrete composition in the mixing drum 1 is further stirred by the rotating shaft 2 61 and the stirring blade 62, thereby further improving the mixing efficiency of the concrete composition in the mixing drum 1.

[0039] Reference Figure 4 and Figure 5 The synchronous moving component 63 includes a gear ring 631 arranged between the support frame 55 and the mixing drum 1, the gear ring 631 is fixedly connected to the mixing drum 1, two symmetrical gears 632 are meshedly connected inside the gear ring 631, the two gears 632 are fixedly connected to the corresponding rotating shaft 2 61, and two symmetrical connecting rods 633 are fixed on the rotating shaft 1 51, and one end of the connecting rod 633 away from the rotating shaft 1 51 is rotatably connected to the corresponding rotating shaft 2 61.

[0040] When the rotating shaft 1 51 rotates, the rotating shaft 1 51 drives the connecting rod 633, and the connecting rod 633 drives the rotating shaft 2 61, so that the rotating shaft 2 61 rotates around the rotating shaft 1 51, and at the same time, the rotating shaft 2 61 drives the gear 632, so that the gear 632 moves along the ring gear 631, and the gear 632 rotates on the ring gear 631. When the gear 632 rotates, the gear 632 drives the rotating shaft 2 61 to rotate. By using the connecting rod 633 to drive the rotating shaft 2 61, the rotating shaft 2 61 drives the gear 632 to move along the ring gear 631, so that the rotating shaft 2 61 can rotate around the rotating shaft 1 51 and the rotating shaft 2 61 can rotate at the same time.

[0041] Reference Figure 2 and Figure 5 The mixing drum 1 is rotatably connected with a support ring 634, which penetrates the mixing drum 1, and the two rotating shafts 61 penetrate the support ring 634 and are rotatably connected with the support ring 634. When the rotating shaft 1 51 drives the rotating shaft 2 61 to rotate by the connecting rod 633, the rotating shaft 2 61 drives the support ring 634, so that the support ring 634 rotates on the mixing drum 1. By supporting the rotating shaft 2 61 by the support ring 634, the possibility of the rotating shaft 2 61 needing to reserve a moving space on the mixing drum 1 when moving can be reduced.

[0042] Working principle: When producing high compressive strength recycled concrete composition, firstly, cement is added into mixing drum 1 in the content of 40% of the total volume, recycled aggregate is added into the content of 60% of the total volume, high-efficiency water reducing agent is added into the content of 2% of cement mass, and nano-silicon dioxide is added into the mixing drum 1 in the content of 2% to 3% of the total volume. Before the recycled aggregate is added into mixing drum 1, the recycled aggregate is ultrasonically cleaned to remove tiny particles attached, and then it is hot-air dried at 80°C for 2 hours and then cooled to reduce the internal residual moisture.

[0043] Then, the driving motor 53 on the support frame 55 drives the rotating shaft 51 to rotate, and the rotating shaft 51 drives the stirring rod 52, and the stirring rod 52 performs preliminary horizontal mixing and stirring on the composition in the mixing drum 1. When the rotating shaft 51 rotates, the rotating shaft 51 drives the flipping auger 541. When the flipping auger 541 rotates, the flipping auger 541 flips the concrete composition at the bottom of the mixing drum 1 from the bottom to the top. At the same time, the rotating shaft 51 drives the stirring rod 52, and the stirring rod 52 drives the flipping inclined plate 542. The flipping inclined plate 542 moves along the inner wall of the mixing drum 1, and the flipping inclined plate 542 scrapes the concrete composition on the inner wall of the mixing drum 1. At the same time, the inclined surface of the flipping inclined plate 542 is used to move the concrete composition above the mixing drum 1 to the bottom of the mixing drum 1, so that the concrete composition in the mixing drum 1 can be stirred simultaneously in both horizontal and vertical directions.

[0044] While the rotating shaft 1 51 rotates, the rotating shaft 1 51 drives the connecting rod 633, and the connecting rod 633 drives the rotating shaft 2 61, so that the rotating shaft 2 61 rotates around the rotating shaft 1 51 under the support of the supporting ring 634, and at the same time, the rotating shaft 2 61 drives the gear 632, so that the gear 632 moves along the gear ring 631, and the gear 632 rotates on the gear ring 631. While the gear 632 rotates, the gear 632 drives the rotating shaft 2 61 to rotate, and the rotating shaft 2 61 drives the stirring blade 62 to further stir the concrete composition in the mixing drum 1. When the rotating shaft 2 61 drives the stirring blade 62 to rotate, the stirring blade 62 pushes the concrete composition to the bottom of the mixing drum 1. After the concrete composition in the mixing drum 1 is stirred, it is discharged from the discharge pipe 4 of the mixing drum 1.

Claims

1. A recycled concrete composition with high compressive strength, characterized in that: The concrete composition comprises cement, recycled aggregate, high-efficiency water reducing agent and nano silicon dioxide.

2. A recycled concrete composition with high compressive strength according to claim 1, characterized in that: The cement content accounts for 40% of the total mass, the recycled aggregate content accounts for 60% of the total mass, the high-efficiency water reducer accounts for 1.5% of the cement mass, the high-efficiency water reducer is based on a polycarboxylic acid water reducer, and the nano-silica accounts for 2% to 3% of the total mass.

3. A production device for a recycled concrete composition with high compressive strength, comprising a mixing drum (1), characterized in that: A support seat (2) is fixed on the mixing drum (1), an upper hopper (3) is fixed on one side of the mixing drum (1), the upper hopper (3) is communicated with the mixing drum (1), a discharge pipe (4) is fixed at the bottom of the mixing drum (1), the discharge pipe (4) is communicated with the mixing drum (1), a high-efficiency stirring mechanism (5) is arranged in the mixing drum (1), and an auxiliary stirring mechanism (6) is arranged in the mixing drum (1).

4. The production equipment of a recycled concrete composition with high compressive strength according to claim 3, characterized in that: The high-efficiency stirring mechanism (5) comprises a support frame (55) fixed on the stirring drum (1); a rotating shaft (51) is rotatably connected inside the stirring drum (1); one end of the rotating shaft (51) passes through the stirring drum (1); a driving motor (53) is fixed on the support frame (55); an output end of the driving motor (53) passes through the support frame (55) and is fixedly connected to the rotating shaft (51); a plurality of evenly distributed stirring rods (52) are fixed on the rotating shaft (51); and a flipping assembly (54) is provided on the rotating shaft (51).

5. The production equipment of a recycled concrete composition with high compressive strength according to claim 4, characterized in that: The flipping assembly (54) comprises a flipping auger (541) fixed on the rotating shaft (51); a flipping inclined plate (542) is fixed to one end of the stirring rod (52) away from the rotating shaft (51); the tilting direction of the flipping inclined plate (542) is opposite to the direction of the flipping auger (541); and the flipping inclined plate (542) is in contact with the inner wall of the stirring drum (1).

6. The production equipment of a recycled concrete composition with high compressive strength according to claim 4, characterized in that: The auxiliary stirring mechanism (6) comprises two rotating shafts (61) symmetrically arranged on both sides of the rotating shaft (51), the rotating shafts (61) passing through the corresponding stirring rods (52) and being rotatably connected to the stirring rods (52), a plurality of stirring blades (62) being fixed on the rotating shafts (61), the stirring blades (62) being arranged in an inclined manner, the inclination angle of the stirring blades (62) being opposite to the inclination angle of the flipping auger (541), one end of the two rotating shafts (61) passing through the stirring drum (1), and a synchronous moving component (63) being arranged between the two rotating shafts (61) and the rotating shaft (51).

7. The production equipment of a recycled concrete composition with high compressive strength according to claim 6, characterized in that: The synchronous moving assembly (63) comprises a gear ring (631) arranged between the support frame (55) and the mixing drum (1), the gear ring (631) being fixedly connected to the mixing drum (1), two symmetrical gears (632) being meshedly connected inside the gear ring (631), the two gears (632) being fixedly connected to the corresponding second rotating shaft (61), two symmetrical connecting rods (633) being fixed on the first rotating shaft (51), and one end of the connecting rod (633) away from the first rotating shaft (51) being rotatably connected to the corresponding second rotating shaft (61).

8. The production equipment of a recycled concrete composition with high compressive strength according to claim 6, characterized in that: A support ring (634) is rotatably connected to the mixing drum (1); the support ring (634) passes through the mixing drum (1); and the two second rotating shafts (61) pass through the support ring (634) and are rotatably connected to the support ring (634).

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