UHPC artistic curtain wall plate manufacturing process
By using dry ice and ready-mixed powder in the UHPC art curtain wall panel production process, and through temperature control and carbon dioxide recycling, the problem of difficult temperature control during the stirring process is solved, and the performance of concrete and the quality of curtain wall panels are improved. , avoiding energy waste and safety hazards.
Patent Information
- Application Number
- CN202411242463.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2024-12-10
AI Technical Summary
In the existing UHPC art curtain wall panel production process, it is difficult to control the temperature during the stirring process, resulting in poor workingability of the concrete. The existing cooling measures such as the use of cooling water or liquid nitrogen have problems such as the use of energy waste and safety hazards.
Use dry ice as coolant, stir with UHPC ready-mixed powder in the stirring device, control the amount of dry ice by temperature sensor, ensure that the temperature in the stirring barrel is in the appropriate range, avoid resource waste and safety hazards, and collect through cylinders and carbon dioxide. The box realizes the recycling of dry ice.
It effectively reduces the temperature of concrete, improves its rheological properties and compactness, improves the impermeability level, smoothes the surface of the curtain wall panel, improves performance, and ensures the purity of raw materials, reducing energy consumption and safety risks.
Smart Images
Figure CN119099042A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building exterior wall decoration, and in particular to a UHPC artistic curtain wall panel manufacturing process. Background Art
[0002] With the continuous improvement of economic level, people's requirements for the art and beauty of buildings are constantly increasing, and the demand for various personalized, curved, hollow and other artistic curtain wall panels is constantly increasing, which puts forward new requirements for the production technology and raw material performance of artistic curtain wall panels. Ultra-high performance concrete (UHPC) has ultra-high strength and ultra-high durability. Its application in engineering is conducive to reducing the dead weight of the structure. At the same time, it has good modeling and processing performance. Compared with traditional glass fiber reinforced concrete (GRC) materials, the curtain wall panels made of it also have the advantages of high compressive strength, durability, and easy maintenance, which can meet the current requirements for raw materials for the production of artistic curtain wall panels.
[0003] The specific production process of existing UHPC art curtain wall panels is: mold making and finishing - batching and mixing - pouring and vibration - maintenance and demoulding - surface processing and polishing - quality inspection. The mixing method adopted in the batching and mixing stage is to directly pour the prepared concrete raw materials into the mixer for mixing. When the concrete raw materials are mixed, the lower limit of the weather temperature is 5℃ and the upper limit is 25℃ or higher than 25℃. In the hot summer, if no cooling measures are taken during the mixing process and forced mixing is performed, the moisture in the concrete will evaporate, resulting in the deterioration of the working properties of the concrete mixture, such as reduced fluidity and workability. It may also cause the concrete to dry quickly after pouring, resulting in shrinkage cracks, affecting the strength and durability of the concrete, and affecting the quality of the final curtain wall panels. The existing cooling measure is to cool the concrete mixing water to reduce the concrete temperature. This method can reduce the concrete temperature by up to 6°C, but this method must control the amount of cooling water added so that it does not exceed the demand for concrete mixing water. Controlling the amount of water added makes it difficult to ensure that the temperature can be reduced to the required temperature conditions. There is also the use of liquid nitrogen as a coolant for cooling, but liquid nitrogen cooling causes energy waste, and liquid nitrogen leakage poses a greater safety hazard. Summary of the invention The purpose of the present invention is to provide a UHPC art curtain wall panel production process to solve the problem that in the existing process, it is difficult to ensure that the temperature can be lowered to the required temperature condition by controlling the amount of water added during the stirring process or liquid nitrogen cooling is used, resulting in energy waste and safety hazards.
[0004] In order to solve the above problems, the technical solutions provided are as follows: A UHPC art curtain wall panel manufacturing process comprises the following steps: S1: Mold making and finishing: Make the mold, clean the attachments inside the mold, repair the holes and pits with resin, and then polish with sandpaper until the mold surface is smooth and the lines are smooth; finally, rinse the mold and use a cutting machine to trim the burrs at the intersection of the mold; S2: Ingredients: weigh 80-85% UHPC premixed powder, 5-8% fiber, 0.5-1.5% water reducer, and 5-10% water; S3: stirring: add the UHPC premixed powder weighed in step S2 into the stirring device, start the machine, stir for 1-3 minutes, add dry ice, add water reducer and water through a metering pump, continue stirring for 6-8 minutes, then manually add fiber, stir for 3-5 minutes, then stop the machine to obtain a uniformly stirred structural layer slurry; S4: Pouring and vibrating: The slurry is evenly mixed and poured into the mold. A vibrator is used to vibrate and compact it evenly. Then workers use a clean scraper to smooth the surface. S5: Placement and positioning of the back-attached steel frame: After pouring is completed and before the concrete begins to set, place the embedded back-attached steel frame, tighten the embedded bolts on the steel frame and place it into the poured mold. After pouring, the embedded bolts should be loosened to make all the bolts loose and allow movement; S6: Curing and demoulding: Static curing, tighten the back steel frame and embedded bolts before demoulding, and use a crane to lift and demould; S7: Surface processing and polishing: Use a grinder to grind the wall panel to form a complete UHPC art curtain wall panel; S8: Protection: Apply polyurethane waterproof coating on the complete surface of UHPC art curtain wall panels.
[0005] The beneficial effects of the above technical solution are: 1. After adding UHPC premixed powder to the mixing device, add dry ice and mix together. UHPC premixed powder, as coarse aggregate, accounts for a large proportion of the raw materials of curtain wall panels. Dry ice first lowers the temperature of UHPC premixed powder, which can quickly keep the temperature of the raw materials added later below the required temperature conditions. In addition, using dry ice for cooling will not cause waste of resources, and there is no safety hazard of leakage. Under the action of dry ice, the temperature in the mixing barrel is controlled within a fixed range and will not rise, which improves the rheological properties of UHPC concrete and the microstructure after hardening, enhances its density, reduces capillary action, improves its airtight and water-proof performance, and greatly improves the anti-seepage grade to more than 10MPa, so that the various performances of the curtain wall panels finally obtained are improved, and the surface of the curtain wall panels becomes smoother.
[0006] 2. During the mixing process, dry ice will automatically sublimate into carbon dioxide gas and escape from the mixing barrel. No new impurities will be introduced into the raw materials of the curtain wall panels, thus ensuring the purity of the raw materials for manufacturing the curtain wall panels.
[0007] Furthermore, the mold in step S1 includes a bottom mold, a main mold and a side mold, the main mold is fixedly arranged on the front and rear sides of the bottom mold to form an integral body with the bottom mold, the left and right sides of the upper end surface of the bottom mold are provided with grooves, and the bottom end of the side mold is stuck in the groove to form a square frame structure with the main mold. The side mold can be pushed out of the groove by pushing the side mold, and the side of the formed curtain wall panel is exposed, which is convenient for the crane to clamp it and crane the mold out.
[0008] Furthermore, a limit pile is provided in the center of the outer side of the main mold, and a draw rope is fixedly connected to the outer side of the side mold, and the draw rope is wound and bolted to the limit pile. The draw rope is bolted to the limit pile to bind the main mold and the side mold together, which is convenient for disassembly and prevents the side mold from collapsing during pouring.
[0009] Furthermore, in step S2, 82% of UHPC premixed powder, 8% of fiber, 1% of water reducing agent, and 9% of water are weighed.
[0010] Further, the stirring device of step S3 includes a stirring barrel, which includes an inner shell and an outer shell, a cavity is formed between the inner shell and the outer shell, the top of the inner shell is open, a stirring shaft is provided in the inner shell, a plurality of long stirring rods and short stirring rods are arranged evenly from top to bottom, the upper end of the stirring shaft extends out of the top of the outer shell and is fixedly connected to a motor, a water reducer metering pump and an aqueous solution metering pump are provided on the left side of the top of the outer shell, and a dry ice storage hopper and a feed port are provided on the right side of the top of the outer shell. The motor is turned on to drive the stirring shaft to rotate, so that the stirring rods stir the raw materials added to the stirring barrel evenly, the long stirring rods and the short stirring rods cooperate in stirring, the long stirring rods are responsible for stirring in a large range, and ensure the uniformity of the overall mixture; while the short stirring rods can perform more detailed stirring in local areas, especially for those materials that are easy to form precipitation or stratification, so that the stirring is more uniform and the effect is better. While stirring, the dry ice storage hopper can add dry ice to the stirring barrel, mix and stir with the raw materials to avoid the temperature in the stirring barrel from rising, and the long stirring rods and the short stirring rods cooperate in stirring more comprehensively, and can stir and discharge the dry ice into bubbles outside the stirring barrel.
[0011] Furthermore, the middle part of the inner shell is provided with an air port connecting the inside and outside of the inner shell, and the cavities of the inner shell and the outer shell are provided with an air cylinder, which is located below the air port, and the top of the air cylinder is fixedly connected to a movable frame, and the movable frame is fixedly connected to a movable block through a spring, and the movable block is compressed in the movable frame to separate the cavity into an upper part and a lower part, and the bottom end of the outer shell is connected to an air outlet pipe, and the end of the air outlet pipe is connected to a carbon dioxide collection box. When the dry ice in the inner shell sublimates into carbon dioxide gas and escapes from the top of the inner shell into the cavity, the carbon dioxide gas that begins to sublimate is still in a low temperature state, at this time the air cylinder contracts, the movable block is compressed in the movable frame and is located below the air port, and the escaped carbon dioxide gas can only flow back to the inner shell from the air port through the upper part of the cavity to play a cooling role, thereby realizing resource recycling and cost saving. After the carbon dioxide gas is reused, the cylinder is started to extend and lift the movable frame upward, and the movable frame slides upward in the cavity. When the movable frame slides to the air port of the inner shell, the spring pushes the movable block out of the movable frame and seals the air port of the inner shell. At this time, there is a gap between the movable frame and the movable block. The carbon dioxide gas escaping from the top of the inner shell flows from the gap between the movable frame and the movable block to the lower part of the cavity, and finally flows out from the outlet pipe and is recovered to the carbon dioxide collection box for collection and compression to make dry ice for repeated use.
[0012] Furthermore, a temperature sensor is provided at the bottom of the inner wall of the inner shell, and a temperature control valve is provided at the outlet of the dry ice storage hopper, and the temperature sensor is electrically connected to the temperature control valve. The temperature sensor senses the temperature change in the mixing barrel, and when the temperature in the barrel reaches above 30°C, the temperature sensor is linked to open the temperature control valve, so that the outlet of the dry ice storage hopper is opened, and dry ice is added to the mixing barrel. When the temperature drops below 30°C, the temperature sensor is linked to close the temperature control valve, so that the outlet of the dry ice storage hopper is closed, and the addition of dry ice to the mixing barrel is stopped.
[0013] Furthermore, the end of the long stirring rod is fixedly connected with a scraper that fits the inner wall of the inner shell. The scraper rotates with the stirring rod and scrapes the material on the inner wall of the stirring barrel intermittently to prevent the material from adhering to the inner wall of the stirring barrel for a long time, resulting in the lack of raw materials in the slurry finally stirred, which affects the quality of the curtain wall panel finally manufactured. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a front view structural schematic diagram of the mold of the present invention; Figure 2 It is a schematic diagram of the top view of the mold of the present invention; Figure 3 It is a structural schematic diagram of the stirring device of the present invention; Figure 4 The present invention is a process flow chart of the UHPC art curtain wall panel production process.
[0015] The figure marks in the drawings of the specification include: bottom mold 1, main mold 2, side mold 3, groove 4, limit pile 5, limit plate 51, pull rope 6, mixing barrel 7, inner shell 71, outer shell 72, air port 73, cylinder 74, movable frame 75, spring 76, movable block 77, air outlet pipe 78, carbon dioxide collection box 79, stirring shaft 8, long stirring rod 9, short stirring rod 10, scraper 11, motor 12, water reducer metering pump 13, aqueous solution metering pump 14, dry ice storage hopper 15, feed port 16, temperature sensor 17, temperature control valve 18, discharge pipe 19. DETAILED DESCRIPTION
[0016] The following is further described in detail through specific implementation methods: The embodiment is basically as shown in the attached Figure 1-4 As shown: UHPC art curtain wall panel production mold Figure 1 and Figure 2 As shown, it includes a bottom mold 1, a main mold 2 and a side mold 3. The main mold 2 is fixedly arranged on the front and rear sides of the bottom mold 1 to form an integral body with the bottom mold 1. Grooves 4 are arranged on the left and right sides of the upper end surface of the bottom mold 1. The bottom ends of the side molds 3 are stuck in the grooves 4 to form a frame structure with the main mold 2. A cylindrical limiting pile 5 is arranged in the center of the outer side of the main mold 2. A limiting plate 51 is welded at the end of the limiting pile 5. The diameter of the limiting plate 51 is larger than the diameter of the limiting pile 5. A pull rope 6 is fixedly connected to the outer side of the side mold 3, and the pull rope 6 is wound and bolted on the limiting pile 5.
[0017] Stirring device such as Figure 3 As shown, the stirring barrel 7 includes an inner shell 71 and an outer shell 72, a cavity is formed between the inner shell and the outer shell, the top of the inner shell 71 is open, a stirring shaft 8 is arranged in the inner shell 71, and the stirring shaft 8 is provided with a plurality of evenly arranged long stirring rods 9 and short stirring rods 10 from top to bottom, the long stirring rods 9 and the short stirring rods 10 are arranged alternately, and a scraper 11 is welded to the end of the long stirring rod 9 and is in contact with the inner wall of the inner shell 71, the upper end of the stirring shaft 8 extends out of the top of the outer shell 72 and is fixedly connected to a motor 12, the end of the stirring shaft 8 is welded to the output shaft of the motor 12, and a water reducing agent metering pump 13 and an aqueous solution metering pump 14 are arranged on the left side of the top of the outer shell 72. The water reducing agent metering pump 13 and the aqueous solution metering pump 14 are used for feeding the water reducing agent and the aqueous solution. A dry ice storage hopper 15 and a feeding port 16 are provided on the right side of the top of the outer shell 72. A temperature sensor 17 is provided at the bottom of the inner wall of the inner shell 71. A temperature control valve 18 is provided at the outlet of the dry ice storage hopper 15. The temperature sensor 17 is electrically connected to the temperature control valve 18. A discharge pipe 19 that passes through the bottom of the outer shell 72 is provided at the bottom of the inner shell 71. A controller is provided outside the stirring barrel 7. The temperature sensor 17 transmits the temperature signal inside the inner shell 71 to the controller, and the controller controls the opening and closing of the temperature control valve 18, thereby controlling whether the dry ice storage hopper 15 adds dry ice into the stirring barrel 7.
[0018] An air port 73 connecting the inside and outside of the inner shell 71 is provided in the middle of the inner shell 71, and a cylinder 74 is provided in the cavity of the inner shell 71 and the outer shell 72. The cylinder 74 is located below the air port 73. A movable frame 75 is fixedly connected to the top of the cylinder 74, and a movable block 77 is fixedly connected to the movable frame 75 through a spring 76. The movable block 77 is compressed in the movable frame 75 to separate the cavity into an upper part and a lower part. An air outlet pipe 78 is connected to the bottom end of the outer shell 72, and a carbon dioxide collection box 79 is connected to the end of the air outlet pipe.
[0019] The specific implementation process is as follows: A UHPC art curtain wall panel production process, such as Figure 4 As shown, the following steps are included: S1: Mold making and finishing: Make the mold, clean the attachments inside the mold, repair the holes and pits with resin, and then polish with sandpaper until the mold surface is smooth and the lines are smooth; finally, rinse the mold and use a cutting machine to trim the burrs at the intersection of the mold; S2: Ingredients: weigh 82% UHPC premixed powder, 8% fiber, 1% water reducer, and 9% water; S3: stirring: add the UHPC premixed powder weighed in step S2 into the stirring barrel through the feed port, turn on the motor, stir for 1 minute, add water reducer and water into the inner shell through the water reducer metering pump and the aqueous solution metering pump respectively, continue stirring for 6 minutes, then manually add fiber, stir for 5 minutes, and stop the machine to obtain a uniformly stirred structural layer slurry; during the stirring process, as long as the temperature sensor in the stirring barrel detects that the temperature in the stirring barrel reaches above 30°C, the temperature sensor transmits the temperature signal inside the stirring barrel to the controller, the controller controls the temperature control valve at the outlet of the dry ice storage hopper to open, and dry ice is added to the inner shell. When the temperature drops below 30°C, the controller controls the temperature control valve at the outlet of the dry ice storage hopper to close, so that the outlet of the dry ice storage hopper is closed, and the addition of dry ice into the stirring barrel is stopped.
[0020] S4: Pouring and vibrating: The slurry is evenly mixed and poured into the mold. A vibrator is used to vibrate and compact it evenly. Then workers use a clean scraper to smooth the surface. S5: Placement and positioning of the back-attached steel frame: After pouring is completed and before the concrete begins to set, place the embedded back-attached steel frame, tighten the embedded bolts on the steel frame and place it into the poured mold. After pouring, the embedded bolts should be loosened to make all the bolts loose and allow movement; S6: Curing and demoulding: Static curing, tighten the back steel frame and embedded bolts before demoulding, and use a crane to lift and demould; S7: Surface processing and polishing: Use a grinder to grind the wall panel flat, and the UHPC art curtain wall panel is completed.
[0021] S8: Protection: Apply polyurethane waterproof coating on the complete surface of UHPC art curtain wall panels. Polyurethane waterproof coating has high adhesion and good UV resistance, which can effectively prevent moisture penetration and UV damage to UHPC art curtain wall panels.
[0022] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A UHPC art curtain wall panel production process, It is characterized in that The following steps are involved: S1: Mold making and finishing: Make the mold, clean the attachments inside the mold, repair the holes and pits with resin, and then polish with sandpaper until the mold surface is smooth and the lines are smooth; finally, rinse the mold and use a cutting machine to trim the burrs at the intersection of the mold; S2: Ingredients: weigh 80-85% of UHPC premixed powder, 5-8% of fiber, 0.5-1.5% of water reducer, and 5-10% of water; S3: stirring: add the UHPC premixed powder weighed in step S2 into the stirring device, start the machine, stir for 1-3 minutes, add dry ice, add water reducer and water through a metering pump, continue stirring for 6-8 minutes, then manually add fiber, stir for 3-5 minutes, then stop the machine to obtain a uniformly stirred structural layer slurry; S4: Pouring and vibrating: The slurry is evenly mixed and poured into the mold. A vibrator is used to vibrate and compact it evenly. Then workers use a clean scraper to smooth the surface. S5: Placement and positioning of the back-attached steel frame: After pouring, place the embedded back-attached steel frame before the concrete begins to set. Tighten the embedded bolts on the steel frame and place it in the poured mold. After pouring, loosen the embedded bolts to make all bolts loose and allow them to move. S6: Curing and demoulding: Static curing, tighten the back steel frame and embedded bolts before demoulding, and use a crane to lift and demould; S7: Surface processing and polishing: Use a grinder to grind the wall panel to form a complete UHPC art curtain wall panel; S8: Protection: Apply polyurethane waterproof coating on the complete surface of UHPC art curtain wall panels.
2. According to claim 1, a UHPC art curtain wall panel production process, Features: The mold in step S1 includes a bottom mold, a main mold and a side mold. The main mold is fixedly arranged on the front and rear sides of the bottom mold to form an integral body with the bottom mold. Grooves are arranged on the left and right sides of the upper end surface of the bottom mold. The bottom end of the side mold is stuck in the groove to form a square frame structure with the main mold.
3. A UHPC art curtain wall panel manufacturing process according to claim 2, Features: A limiting pile is arranged at the center of the outer side of the main mold, and a draw rope is fixedly connected to the outer side of the side mold, and the draw rope is wound and bolted on the limiting pile.
4. According to claim 1, a UHPC art curtain wall panel production process, Features: In step S2, 82% of UHPC premixed powder, 8% of fiber, 1% of water reducing agent and 9% of water are weighed.
5. According to claim 1, a UHPC art curtain wall panel production process, Features: The stirring device of step S3 comprises a stirring barrel, which comprises an inner shell and an outer shell, a cavity is formed between the inner shell and the outer shell, the top of the inner shell is open, a stirring shaft is arranged in the inner shell, and the stirring shaft is provided with a plurality of long stirring rods and short stirring rods arranged evenly from top to bottom, the upper end of the stirring shaft extends out of the top of the outer shell and is fixedly connected to a motor, a water reducer metering pump and an aqueous solution metering pump are provided on the left side of the top of the outer shell, and a dry ice storage hopper and a feed port are provided on the right side of the top of the outer shell.
6. A UHPC art curtain wall panel manufacturing process according to claim 5, Features: An air port connecting the inside and outside of the inner shell is provided in the middle of the inner shell, a cylinder is provided in the cavity of the inner shell and the outer shell, the cylinder is located below the air port, a movable frame is fixedly connected to the top of the cylinder, a movable block is fixedly connected to the movable frame through a spring, the movable block is compressed in the movable frame to separate the cavity into an upper part and a lower part, an air outlet pipe is connected to the bottom end of the outer shell, and the end of the air outlet pipe is connected to a carbon dioxide collection box.
7. A UHPC art curtain wall panel manufacturing process according to claim 6, Features: A temperature sensor is provided at the bottom end of the inner wall of the inner shell, a temperature control valve is provided at the outlet of the dry ice storage hopper, and the temperature sensor is electrically connected to the temperature control valve.
8. A UHPC art curtain wall panel manufacturing process according to claim 7, Features: The end of the long stirring rod is fixedly connected with a scraper which is in contact with the inner wall of the inner shell.