Preparation method of C60 high-performance micro-expansion toughened marine concrete

Abstract

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of C60 high-performance micro-expansion toughened marine concrete, which comprises cement, sand, stone, fly ash, slag powder, water, a water reducing agent, fiber and an expanding agent according to a weight (kg / m < 3 >) ratio of 316: 600: 1166: 95: 118: 148: 6.88: 1.2: 42.4. According to the preparation method, through the arrangement of the material distribution mechanism, the unique quartering dynamic material distribution technology of the material distribution mechanism and the cooperation of hydraulic driving and anti-abrasion design, the material proportioning time is remarkably shortened, favorable conditions are created for the subsequent stirring procedure through a pre-distribution strengthening system, the stirring time of a stirrer is effectively shortened, and the production efficiency is improved; by arranging the scattering mechanism, the scattered fibers can be in full contact and mixed with other materials, by taking the fiber reinforced composite material as an example, the fibers are well dispersed, so that the fibers can be better wrapped by resin and other matrix materials, the interface bonding area between the fibers and the matrix materials is increased, and the overall mechanical property of the composite material is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to a preparation method of C60 high-performance slightly expanding and toughening marine concrete. Background Art

[0002] Marine concrete in the marine environment is long-term faced with multiple damaging factors such as chloride ion erosion, wet-dry cycles, and freeze-thaw alternation. Due to insufficient impermeability, shrinkage cracking, and brittle defects of traditional materials, the service life generally falls short of the design expectation. Research shows that serious steel bar corrosion appears in ordinary marine concrete in a high-salt environment in 20 - 30 years, and the chloride ion diffusion coefficient is above 8.0×10 -12 m 2 / s, and the crack resistance performance is difficult to meet the requirements of century projects such as cross-sea bridges and port terminals.

[0003] Although the existing technology can partially improve the performance by adding an expansion agent or fiber reinforcement, there is a risk of late-stage expansion cracking for traditional expansion agents, the toughening effect of a single fiber is limited, and the contradiction between low water-binder ratio and construction fluidity is prominent due to high strength requirements.

[0004] In view of the above problems, the present invention proposes a preparation method of C60 high-performance slightly expanding and toughening marine concrete. Summary of the Invention

[0005] Based on the technical problems of insufficient durability, poor crack resistance, and insufficient toughness of existing traditional marine concrete in extreme marine environments, the present invention proposes a preparation method of C60 high-performance slightly expanding and toughening marine concrete.

[0006] The preparation method of C60 high-performance slightly expanding and toughening marine concrete proposed by the present invention, by weight (kg / m 3 ) ratio includes cement:sand:stone:fly ash:slag powder:water:water reducing agent:fiber:expansion agent = 316:600:1166:95:118:148:6.88:1.2:42.4.

[0007] Preferably, the solid content in the water reducing agent is 33.68%.

[0008] Step 1: Pre-distribute cement, sand, stone, fly ash, slag powder, water, water reducing agent, fiber, and expansion agent according to the ratio of kilograms per cubic meter, and then add cement, fly ash, slag powder, and expansion agent into the mixing mechanism in sequence, dry mix for 1 - 3 min, pause, add 70% of the water consumption into the mixing mechanism, and wet mix for 2 - 3 minutes to form a uniform slurry;

[0009] Step 2: Immediately add the pre-distributed 95% sand and gravel into the mixing mechanism and mix for 1 minute. After the aggregate surface is wrapped with slurry, before adding the fiber, first add it to 5% of the sand, mix the fiber and sand mixture through the mixing mechanism, and then add the mixture to the slurry in Step 1 and mix at a low speed for 2 - 3 minutes;

[0010] Step 3: Add the remaining 30% of the water consumption and water reducer and mix at a high speed for 1 - 2 minutes.

[0011] Preferably, the mixing mechanism includes a mixer. A conveyor belt is arranged on one side of the mixer. A material distribution mechanism is arranged at the upper end of the mixer. A sand bin is arranged on one side of the material distribution mechanism. A dispersing mechanism is arranged at the lower end of the sand bin. A water supply pump 1 is arranged on one side of the mixer. A water supply pump 2 is arranged on one side of the water supply pump 1.

[0012] The material distribution mechanism realizes the action of separating materials.

[0013] The dispersing mechanism realizes the action of dispersing the fiber.

[0014] Preferably, the material distribution mechanism includes a distribution bin. The interior of the distribution bin is divided into four equal parts along its symmetry axis. A protection tube is embedded in the upper end bin body of the distribution bin. Slide blocks are respectively fixedly connected to both side surfaces of the partition board of the feed bin. A placement groove is opened at the position where the partition boards of the feed bin are in contact with each other. A protection tube is fixedly connected to the inner wall of the placement groove. A rotating component is arranged inside the protection tube. A hydraulic turntable is arranged at the upper end of the rotating component. The rotating part of the hydraulic turntable is fixedly connected to the upper end of the rotating component. A hydraulic oil pipe is laid inside the protection tube. The end of the hydraulic oil pipe is fixedly communicated with the end of the hydraulic turntable. A bearing 2 is arranged at the lower end of the rotating component. The inner ring of the bearing 2 is fixedly connected to the inner bottom wall of the placement groove. The upper end of the outer ring of the bearing 2 is fixedly connected to the lower end of the rotating component. Support plates 1 are arranged in an array on the side surface of the outer ring of the bearing 2. The upper surface of the support plate is slidably connected to the lower surface of the slide block. The lower end of the feed bin is fixedly connected to a distribution bin. A fixed groove is arranged inside the distribution bin. A material distribution device is arranged at the inner wall of the fixed groove.

[0015] Preferably, the material distribution device includes an annular groove formed in the internal partition board of the material distribution bin. The material distribution device further includes a protective sleeve fixed to the inner wall of the fixed groove. The inner wall of the protective sleeve is fixedly connected with a first motor. The output shaft tube of the first motor penetrates through the upper end of the protective sleeve. The upper end of the output shaft of the first motor is fixedly connected with a fixing plate. The outer surface of the fixing plate is provided with a second support plate in an array. The upper end of the fixing plate is provided with a third bearing. The outer ring of the third bearing is fixedly connected with the upper surface of the fixing plate. The upper end of the inner ring of the third bearing is fixedly connected with a support column. The outer surface of the support column is fixedly connected with the inner wall of the fixed groove.

[0016] Preferably, a first discharge port is formed in the inner bottom wall of the sand bin. A second discharge port is formed on one side of the first discharge port. A discharge pipe can be arranged at the bottom end of the sand bin. The inner wall of the discharge pipe is fixedly communicated with the inner wall of the second discharge port. The inner walls of the first discharge port and the second discharge port are both inclined.

[0017] Preferably, the dispersing mechanism includes a mixing box. A support rod is arranged at the bottom of the mixing box. The lower end of the support rod is fixedly connected with the outer surface of the mixer. The upper end of the support rod is fixedly connected with a second motor. The output shaft of the second motor is fixedly connected with a first spur gear. A toothed belt is engaged with the outer surface of the first spur gear. A double-shaft spiral stirring paddle is arranged inside the mixing box. Both ends of the double-shaft spiral stirring paddle are rotatably connected with the pipe body of the mixing box through bearings. One end of the double-shaft spiral stirring paddle is fixedly connected with a main gear. A second spur gear is fixedly connected to one side of the main gear. The surface of the second spur gear is engaged with one end of the toothed belt.

[0018] Preferably, a sand inlet is formed at the upper end of the mixing box. A rotating pipe is arranged around the sand inlet. A sand distributing component is rotatably connected to the inside of the rotating pipe through a bearing. The body of the sand distributing component is symmetrically provided with sand distributing ports. The opening angle of the sand distributing ports is adapted to the length and width of the sand inlet. A diversion bin is arranged on the outer surface of the rotating pipe. The inner wall of the diversion bin is fixedly communicated with the inner wall of the rotating pipe. A third motor is arranged at the upper end of the mixing box. The output shaft of the third motor penetrates through the inner ring of the bearing embedded in the rotating pipe through a coupling and is fixedly connected with one end of the sand distributing component. The inner wall of the diversion bin is fixedly communicated with the inner wall of the first discharge port. A high-pressure air jet device is additionally arranged at the discharge port below one end of the mixing box.

[0019] Preferably, the spaces between the internal partition boards in the material distribution bin are set according to the ratio of cement, fly ash, slag powder and expansion agent.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. By setting up a material distributing mechanism, with its unique four-way dynamic material distribution technology, combined with hydraulic drive and anti-wear design, not only is the material proportioning time significantly shortened, but also a favorable condition is created for the subsequent mixing process through the pre-distribution strengthening system, effectively reducing the mixing time of the mixer and improving production efficiency.

[0022] 2. By setting up a fiber dispersion mechanism, the fibers after dispersion can fully contact and mix with other materials. Taking fiber-reinforced composite materials as an example, good fiber dispersion enables matrix materials such as resin to better wrap the fibers, increasing the interfacial bonding area between the two, thereby improving the overall mechanical properties of the composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0024] Figure 2 It is a front view of the mixing mechanism of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0025] Figure 3 It is a cross-sectional view of the storage bin of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0026] Figure 4 It is a three-dimensional view of the first support plate of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0027] Figure 5 It is a three-dimensional view of the rotating component of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0028] Figure 6 It is a cross-sectional view of the material distribution bin of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0029] Figure 7 It is a cross-sectional view of the protective sleeve of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0030] Figure 8 It is a cross-sectional view of the sand bin of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention;

[0031] Figure 9 It is a cross-sectional view of the mixing tank of a method for preparing C60 high-performance slightly expanded and toughened marine concrete proposed by the present invention.

[0032] In the figure: 1, mixer; 2, conveyor belt; 3, material distribution mechanism; 30, protective pipe; 31, storage bin; 32, sliding block; 33, protection pipe; 34, hydraulic turntable; 35, rotating component; 36, first support plate; 37, second bearing; 38, material distribution bin; 39, material distribution device; 390, annular groove; 391, protective sleeve; 392, first motor; 393, fixing plate; 394, second support plate; 395, third bearing; 396, support column; 4, sand bin; 40, first discharge port; 41, second discharge port; 42, discharge pipe; 5, dispersing mechanism; 51, mixing tank; 52, support rod; 53, second motor; 54, toothed belt; 55, main gear; 56, second spur gear; 57, double - shaft spiral mixing paddle; 58, rotating pipe; 59, sand distributing component; 510, diversion bin; 511, third motor; 6, first water supply pump; 7, second water supply pump. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] Refer to Figures 1-9 , a kind of C60 high - performance slightly - expanded toughened marine concrete, by weight kg / m 3 ratio includes cement: sand: stone: fly ash: slag powder: water: water - reducing agent: fiber: expansive agent = 316:600:1166:95:118:148:6.88:1.2:42.4, and the solid content in the water - reducing agent is 33.68%.

[0035] Step 1: Pre - distribute cement, sand, stone, fly ash, slag powder, water, water - reducing agent, fiber, and expansive agent according to the ratio of kilograms per cubic meter. Then, add cement, fly ash, slag powder, and expansive agent into the mixing mechanism in sequence, dry - mix for 1 - 3 min, pause, add 70% of the water consumption into the mixing mechanism, and wet - mix for 2 - 3 minutes to form a uniform slurry.

[0036] Step 2: Immediately add 95% of the pre - distributed sand and crushed stone into the mixing mechanism, stir for 1 min. After the surface of the aggregate is wrapped with the slurry, before adding the fiber, first add it into 5% of the sand, stir the mixture of fiber and sand through the mixing mechanism, and then add the mixture into the slurry in Step 1, and stir at a low speed for 2 - 3 min.

[0037] Step 3: Add the remaining 30% of the water consumption and the water - reducing agent, and stir at a high speed for 1 - 2 min.

[0038] In this embodiment, the stirring mechanism includes a mixer 1. A conveyor belt 2 is arranged on one side of the mixer 1. A material distribution mechanism 3 is arranged at the upper end of the mixer 1. A sand bin 4 is arranged on one side of the material distribution mechanism 3. A dispersing mechanism 5 is arranged at the lower end of the sand bin 4. A water supply pump 6 is arranged on one side of the mixer 1. A water supply pump 7 is arranged on one side of the water supply pump 6. Shock pads are arranged between the water supply pump 6 and the water supply pump 7 and the outer surface of the mixer 1. The water supply pump 6 is externally connected to a water source through a connecting pipe, and the water supply pump 7 is externally connected to a liquid water reducer through a connecting pipe.

[0039] The material distribution mechanism 3 realizes the action of separating materials.

[0040] The dispersing mechanism 5 realizes the action of dispersing fibers.

[0041] In this embodiment, the material distribution mechanism 3 includes a storage bin 31. The interior of the storage bin 31 is divided into four equal parts along its axis of symmetry. A protective tube 30 is embedded in the upper end bin body of the storage bin 31. Slide blocks 32 are fixedly connected to both side surfaces of the partition plate of the storage bin 31. A placement groove is formed at the position where the partition plates of the storage bin 31 are in contact with each other. A protective tube 33 is fixedly connected to the inner wall of the placement groove. A rotating member 35 is arranged inside the protective tube 33. A hydraulic turntable 34 is arranged at the upper end of the rotating member 35. The rotating part of the hydraulic turntable 34 is fixedly connected to the upper end of the rotating member 35. A hydraulic oil pipe is laid inside the protective tube 30. The end of the hydraulic oil pipe is fixedly communicated with the end of the hydraulic turntable 34. A bearing two 37 is arranged at the lower end of the rotating member 35. The inner ring of the bearing two 37 is fixedly connected to the inner bottom wall of the placement groove. The upper end of the outer ring of the bearing two 37 is fixedly connected to the lower end of the rotating member 35. Support plates one 36 are arranged in an array on the side surface of the outer ring of the bearing two 37. The upper surface of the support plates one 36 is slidably connected to the lower surface of the slide blocks 32. The lower end of the storage bin 31 is fixedly connected to a distribution bin 38. A fixed groove is arranged inside the distribution bin 38. A distribution device 39 is arranged at the inner wall of the fixed groove.

[0042] Specifically, a lubricating layer is applied to the surface of the sliding block 32, and the surface is designed with an inclination angle of 20 degrees, which facilitates the falling of the materials in the storage bin 31, reduces the frictional loss of the sliding block 32, and extends its service life; the protective pipe 33 is made of a double-layer stainless steel bellows (compressive strength ≥ 20 MPa), effectively isolating the impact of the materials; the first support plate 36 is made of a carbon fiber composite material (bearing strength 1200 MPa), avoiding damage caused by overweight materials and being unable to perform the pre-distribution action before material distribution, and extending the service life of the support system; the storage bin 31 and the distribution bin 38 are connected by a quick-release flange; the hydraulic oil pipe enters through the protective pipe 30. When the external hydraulic pump is turned on and hydraulic oil is introduced, the hydraulic turntable 34 rotates, driving the outer ring of the second bearing 37 fixed at the lower end of the rotating member 35 to rotate, and then driving the first support plate 36 to rotate. The materials in the space formed between the rotating first support plate 36 and the partition plate of the storage bin 31 start to fall at the moment when the first support plate 36 rotates until the distribution bin 38 is filled with materials. The rotating member 35 rotates in the controlled direction by the hydraulic turntable 34 to separate the distribution bin 38 from the storage bin 31, thus realizing the action of pre-matching the materials, further reducing the forming time of the entire concrete and improving the work efficiency.

[0043] In this embodiment, the distribution device 39 includes an annular groove 390 annularly formed on the inner partition plate of the distribution bin 38. The distribution device 39 further includes a protective sleeve 391 fixed to the inner wall of the fixed groove. The inner wall of the protective sleeve 391 is fixedly connected with a first motor 392. The output shaft tube of the first motor 392 penetrates through the upper end of the protective sleeve 391. The upper end of the output shaft of the first motor 392 is fixedly connected with a fixing plate 393. The outer surface of the fixing plate 393 is provided with a second support plate 394 in an array. A third bearing 395 is arranged at the upper end of the fixing plate 393. The outer ring of the third bearing 395 is fixedly connected with the upper surface of the fixing plate 393. The upper end of the inner ring of the third bearing 395 is fixedly connected with a support column 396. The outer surface of the support column 396 is fixedly connected with the inner wall of the fixed groove.

[0044] Specifically, the protective sleeve 391 is fixed to the inner wall of the fixed groove, wrapping the first motor 392 inside, playing a role in protecting the motor. It can prevent materials, dust, etc. from entering the interior of the motor, reduce the risk of damage to the first motor 392 due to contamination, extend the service life of the first motor 392, and ensure the stable operation of the distribution device 39; by driving the second support plate 394 to rotate rapidly through the first motor 392, effective distribution operation of the materials can be carried out in a short time. Compared with the traditional distribution method, the distribution time is greatly shortened, thus improving the efficiency of the entire mixing production process. The evenly distributed materials can enter the subsequent mixing process more smoothly, reducing the mixing time, improving the mixing quality, and further enhancing the overall production efficiency.

[0045] In this embodiment, a first discharge port 40 is formed in the inner bottom wall of the sand bin 4. A second discharge port 41 is formed on one side of the first discharge port 40. A discharge pipe 42 may be provided at the bottom end of the sand bin 4. The inner wall of the discharge pipe 42 is fixedly communicated with the inner wall of the second discharge port 41. The inner walls of the first discharge port 40 and the second discharge port 41 are both inclined. The outlet end of the discharge pipe 42 is located below the second support plate 394.

[0046] Specifically, the inner walls of the first discharge port 40 and the second discharge port 41 are designed with a parabolic curved surface to eliminate dead corners where materials stay. The inclination angles of the inner walls of the two discharge ports form a negative angle difference with the angle of repose of the sand, facilitating the faster sliding of the sand. The discharge pipe 42 is designed with a variable diameter. The inlet diameter of the discharge pipe 42 is large, and the outlet diameter is small, forming a Venturi effect to enhance the discharge kinetic energy, so that it is more convenient for the outlet end of the discharge pipe 42 to discharge into the mixer 1.

[0047] In this embodiment, the dispersing mechanism 5 includes a mixing tank 51. A support rod 52 is provided at the bottom of the mixing tank 51. The lower end of the support rod 52 is fixedly connected to the outer surface of the mixer 1. The upper end of the support rod 52 is fixedly connected to a second motor 53. A first spur gear is fixedly connected to the output shaft of the second motor 53. A toothed belt 54 is engaged with the outer surface of the first spur gear. A double - shaft spiral agitator 57 is arranged inside the mixing tank 51. Both ends of the double - shaft spiral agitator 57 are rotatably connected to the pipe body of the mixing tank 51 through bearings. A main gear 55 is fixedly connected to one end of the double - shaft spiral agitator 57. A second spur gear 56 is fixedly connected to one side of the main gear 55. The surface of the second spur gear 56 is engaged with one end of the toothed belt 54. An inlet for sand is formed at the upper end of the mixing tank 51. A rotating pipe 58 is arranged around the inlet for sand. A sand - distributing component 59 is rotatably connected to the inside of the rotating pipe 58 through a bearing. The body of the sand - distributing component 59 is symmetrically provided with sand - distributing ports. A pressure sensor is arranged on the inner bottom wall of the sand - distributing ports. The opening angle of the sand - distributing ports is adapted to the length and width of the inlet for sand. A diversion chamber 510 is arranged on the outer surface of the rotating pipe 58. The inner wall of the diversion chamber 510 is fixedly communicated with the inner wall of the rotating pipe 58. A third motor 511 is arranged at the upper end of the mixing tank 51. The output shaft of the third motor 511 passes through the inner ring of the bearing embedded in the rotating pipe 58 through a coupling and is fixedly connected to one end of the sand - distributing component 59. The inner wall of the diversion chamber 510 is fixedly communicated with the inner wall of the first discharge port 40. A high - pressure air jet device is additionally provided at the discharge port below one end of the mixing tank 51.

[0048] Specifically, the double-shaft spiral agitator paddle 57 adopts a co-rotating / counter-rotating design with a rotational speed of 1500 rpm to form a shear force field, which can effectively break up fiber agglomerates. The spiral blades have serrated edges to reduce the probability of fiber entanglement. The sand distributing component 59 is symmetrically provided with sand distributing openings, and the total volume of the two openings is 5% of the total sand ratio of the concrete, which is added to the mixing tank 51 in two batches. A conveyor belt is arranged on one side of the fiber inlet opened on one side of the mixing tank 51. The pre-distributed fibers flow through the fiber inlet into the mixing tank 51 through the conveyor belt, so as to realize the mixing of sand and fibers, further disperse the fibers, and avoid fiber agglomeration. The high-pressure air jet device adopts a Laval nozzle (which belongs to the prior art and will not be described in detail here). The outlet of the Laval nozzle forms a 45-degree angle with the outlet of the mixing tank 51. The Laval nozzle is embedded on the pipe body of the mixing tank 51. Three Laval nozzles are arranged in a concentric circular array with the outlet of the mixing tank 51 as the center. The three Laval nozzles form a rotating air flow field during operation, which is convenient to spray the sand and fiber mixture into the mixer 1.

[0049] In this embodiment, the spaces between the respective partition plates inside the batching bin 38 are set according to the ratio between cement, fly ash, slag powder, and expansion agent.

[0050] Specifically, through the deep binding of space allocation and formulation ratio, precise control of the entire chain from raw material storage to proportion conveying in concrete production is achieved.

[0051] Refer to Figures 1-9 , the steps of a method for preparing C60 high-performance slightly expanded and toughened marine concrete are as follows:

[0052] Step 1: Before using the mixer 1 to form concrete, first fill the respective isolation spaces of the storage bin 31 with cement, fly ash, slag powder, and expansion agent, and manually put all the expansion agent into the mixer 1. After the preparation work is completed, the operator operates the hydraulic turntable 34. The hydraulic turntable 34 drives the rotating component 35 to rotate, thereby driving the outer ring of the bearing two 37 provided at its lower end to rotate, further driving the support plate one 36 to rotate. After the support plate one 36 rotates 45 degrees, the support plate one 36 completely hides and slides below the sliding block 32 and the partition plate. At this time, the space formed between the support plate one 36 and the partition plate is completely released, so that the respective materials in the storage bin 31 fall into the batching bin 38. After the batching bin 38 is filled, the motor one 392 is started. The motor one 392 drives the fixed plate 393 to rotate, and then drives the support plate two 394 to release the closed space between the partition plates inside the batching bin 38. The materials in the batching bin 38 fall into the mixer 1, and the mixer 1 is started and slowly stirred for 3 minutes and then paused;

[0053] Step 2: Then, water supply pump 6 starts to work to connect to an external water source. The flowmeter installed in water supply pump 6 obtains data that is 70% of the proportioned water volume. Stop the water supply, and then turn on mixer 1 again and stir for 3 minutes (the stirring time can be determined according to the condition of the paddle) until a uniform paddle is formed;

[0054] Step 3: Then, conveyor belt 2 continuously conveys the proportioned gravel to mixer 1 according to the proportioned amount until the surface of the gravel is wrapped with the paddle. Then, sand enters sand bin 4 under the conveyance of the fine sand conveyor belt. The sieve in sand bin 4 divides into two parts. One part enters the sand dividing port of sand dividing component 59 through discharge port 40, and the other part enters mixer 1 along discharge pipe 42 through discharge port 41. Then, half of the pre-distributed amount of fiber is successively fed into the interior of mixing box 51 through the fiber feed port of mixing box 51 in two times by the transportation equipment for transporting fiber. Synchronously turn on motor 2 53 and motor 3 511. Motor 3 511 drives sand dividing component 59 to rotate 180 degrees, and the fine sand filling the sand dividing port is rotated and put into mixing box 51. The pressure sensor at the sand dividing port real-time monitors the sand volume in the sand dividing port. Until the other sand dividing port is filled with sand, motor 3 511 drives sand dividing component 59 to rotate 180 degrees again, and the sand falls into mixing box 51. 5% of the sand has been all added, and motor 3 511 stops working. And the interval time between the two times of adding fiber is the same as the time for pouring sand into the two sand dividing ports. Before sand dividing component 59 completes the second addition of sand, 95% of the sand has not all fallen into mixer 1. Motor 2 53 drives spur gear 2 56 to rotate, and then drives double-shaft spiral stirring paddle 57 fixedly connected to main gear 55 to rotate. Under the action of double-shaft spiral stirring paddle 57, the fine sand and fiber in mixing box 51 become a mixture and move towards the discharge port side of mixing box 51. Turn on the high-pressure air jet device, and the fine sand-fiber mixture located at the discharge port is ejected from mixing box 51 into mixer 1 through the high-pressure air jet device. At this time, 95% of the fine sand has been all added, and the fine sand conveyor belt stops working;

[0055] Step 4: Finally, add the remaining 30% of the water consumption and water reducer and stir at high speed for 2 minutes.

[0056] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitution or change, and should be covered within the protection scope of the present invention.

Claims

1. A C60 high performance micro-expansion toughened marine concrete, characterized by: By weight (kg / m 3 ) The ratio includes cement: sand: stone: fly ash: slag powder: water: water reducer: fiber: expansion agent = 316:600:1166:95:118:148:6.88:1.2:42.

4.

2. The C60 high performance micro-expansion toughened marine concrete according to claim 1, characterized in that: The solid content of the water reducing agent is 33.68%.

3. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 2, characterized in that: Step 1: pre-distribute cement, sand, stone, fly ash, slag powder, water, water reducing agent, fiber and expansion agent according to the ratio of kilograms per cubic meter, then add cement, fly ash, slag powder and expansion agent to the mixing mechanism in order, dry mix for 1-3 minutes, pause, add 70% of the water to the mixing mechanism, wet mix for 2-3 minutes to form a uniform paddle; Step 2: Then immediately add the pre-allocated 95% sand and gravel to the mixing mechanism and stir for 1 minute until the surface of the aggregate is coated with the paddle. Before adding the fiber, add 5% sand first, stir the mixture of fiber and sand through the mixing mechanism, and then add the mixture to the paddle body of step 1 and stir at a low speed for 2-3 minutes. Step 3: Add the remaining 30% of water and water reducing agent and stir at high speed for 1-2 minutes.

4. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 3, characterized in that: The stirring mechanism comprises a stirring machine (1), a conveyor belt (2) is arranged on one side of the stirring machine (1), a material distribution mechanism (3) is arranged on the upper end of the stirring machine (1), a sand bin (4) is arranged on one side of the material distribution mechanism (3), a scattering mechanism (5) is arranged on the lower end of the sand bin (4), a water supply pump (6) is arranged on one side of the stirring machine (1), and a water supply pump (7) is arranged on one side of the water supply pump (6); The material separation mechanism (3) realizes the action of separating and processing the materials; The breaking up mechanism (5) realizes the action of breaking up the fibers.

5. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 4, characterized in that: The material distribution mechanism (3) comprises a material storage bin (31), the interior of the material storage bin (31) is divided into four equal parts along its symmetry axis, a protective tube (30) is embedded in the upper bin body of the material storage bin (31), sliding blocks (32) are fixedly connected to the two side surfaces of the isolation plate of the material storage bin (31), a placement groove is provided at the mutually contacting position of the isolation plates of the material storage bin (31), a protective tube (33) is fixedly connected to the inner wall of the placement groove, a rotating component (35) is arranged inside the protective tube (33), a hydraulic rotary disk (34) is arranged at the upper end of the rotating component (35), the rotating part of the hydraulic rotary disk (34) is fixedly connected to the upper end of the rotating component (35), and the interior of the protective tube (30) is paved with There is a hydraulic oil pipe, the end of which is fixedly connected to the end of the hydraulic turntable (34), the lower end of the rotating component (35) is provided with a second bearing (37), the inner ring of the second bearing (37) is fixedly connected to the inner bottom wall of the mounting groove, the upper end of the outer ring of the second bearing (37) is fixedly connected to the lower end of the rotating component (35), the outer ring side array of the second bearing (37) is provided with a support plate (36), the upper surface of the support plate (36) is slidably connected to the lower surface of the sliding block (32), the lower end of the storage bin (31) is fixedly connected with a distribution bin (38), a fixed groove is provided inside the distribution bin (38), and a distribution device (39) is provided on the inner wall of the fixed groove.

6. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 5, characterized in that: The material distribution device (39) includes an annular groove (390) annularly opened on the internal isolation plate of the material distribution bin (38), and the material distribution device (39) also includes a protective sleeve (391) fixed to the inner wall of the fixed groove, the inner wall of the protective sleeve (391) is fixedly connected with a motor 1 (392), the output shaft tube of the motor 1 (392) passes through the upper end of the protective sleeve (391), the upper end of the output shaft of the motor 1 (392) is fixedly connected with a fixed plate (393), the outer surface array of the fixed plate (393) is provided with a support plate 2 (394), the upper end of the fixed plate (393) is provided with a bearing 3 (395), the outer ring of the bearing 3 (395) is fixedly connected to the upper surface of the fixed plate (393), the upper end of the inner ring of the bearing 3 (395) is fixedly connected with a support column (396), and the outer surface of the support column (396) is fixedly connected to the inner wall of the fixed groove.

7. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 6, characterized in that: The inner bottom wall of the sand bin (4) is provided with a discharge port 1 (40), and a discharge port 2 (41) is provided on one side of the discharge port 1 (40). A discharge pipe (42) may be provided at the bottom end of the sand bin (4), and the inner wall of the discharge pipe (42) is fixedly connected to the inner wall of the discharge port 2 (41), and the inner wall of the discharge port 1 (40) and the inner wall of the discharge port 2 (41) are both arranged to be inclined.

8. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 7, characterized in that: The dispersing mechanism (5) comprises a mixing box (51), a support rod (52) is provided at the bottom of the mixing box (51), the lower end of the support rod (52) is fixedly connected to the outer surface of the mixer (1), the upper end of the support rod (52) is fixedly connected to a second motor (53), the output shaft of the second motor (53) is fixedly connected to a first spur gear, the outer surface of the first spur gear is meshed with a toothed belt (54), a double-shaft helical stirring paddle (57) is provided inside the mixing box (51), the two ends of the double-shaft helical stirring paddle (57) are respectively rotatably connected to the tube body of the mixing box (51) through bearings, one end of the double-shaft helical stirring paddle (57) is fixedly connected to a main gear (55), one side of the main gear (55) is fixedly connected to a second spur gear (56), the surface of the second spur gear (56) is meshed with one end of the toothed belt (54).

9. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 8, characterized in that: The upper end of the mixing box (51) is provided with a sand inlet, and a rotating tube (58) is arranged on the periphery of the sand inlet. The interior of the rotating tube (58) is rotatably connected with a sand dividing component (59) through a bearing. The body of the sand dividing component (59) is symmetrically provided with a sand dividing port, and the opening angle of the sand dividing port is adapted to the length and width of the sand inlet. The outer surface of the rotating tube (58) is provided with a drainage bin (510), and the inner wall of the drainage bin (510) is fixedly connected to the inner wall of the rotating tube (58). The upper end of the mixing box (51) is provided with a motor three (511), and the output shaft of the motor three (511) passes through the inner ring of the bearing embedded in the body of the rotating tube (58) through a coupling and is fixedly connected to one end of the sand dividing component (59). The inner wall of the drainage bin (510) is fixedly connected to the inner wall of the discharge port one (40), and a high-pressure air flow injection device is added to the discharge port below one end of the mixing box (51).

10. The method for preparing C60 high performance micro-expansion toughened marine concrete according to claim 9, characterized in that: The space between the isolation plates inside the distribution bin (38) is arranged according to the ratio of cement, fly ash, slag powder and expansion agent.

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