Crack-resistant construction waste regenerated wallboard and preparation method thereof

Abstract

The invention discloses an anti-crack construction waste recycled wallboard and a preparation method, and relates to the technical field of recycled wallboards, construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, and the wallboard comprises the following raw materials in parts by weight: 1-2 parts of an anti-crack agent, 1-2 parts of an anti-crack agent and 1-2 parts of an anti-crack agent. 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 50-65 parts of anti-cracking cement, 5-15 parts of steel fiber, 2-6 parts of a water reducing agent, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder and 10-18 parts of fly ash are put into a reaction kettle, the materials are stirred uniformly, and the mortar is prepared from the following components in parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 10-15 parts of a bonding material of mortar, 2-6 parts of polypropylene fiber, 6-9 parts of a polymer and 100-120 parts of water. Stirring at the temperature of 35-45 DEG C in the reaction kettle for 20 minutes, stirring in the reaction kettle for 20 minutes, standing for 10 minutes, and stirring in the reaction kettle for 15 minutes again to prepare the anti-cracking cement.

Description

Technical Field

[0001] The invention relates to the technical field of recycled wallboards, in particular to a crack-resistant recycled wallboard made of construction waste and a preparation method thereof. Background Art

[0002] Construction waste refers to the waste materials generated during the construction process, including discarded bricks, concrete blocks, wood, metal, etc. Through sorting, crushing, screening and other processes, the useful components in the construction waste are extracted to make recycled aggregates, recycled concrete and other building materials products. By optimizing the raw material ratio, adding admixtures, adopting fiber reinforcement technology and strengthening maintenance management, the crack resistance of recycled wall panels can be effectively improved. The crack resistance of recycled wall panels from construction waste is not high and the safety cannot be guaranteed.

[0003] The defects of existing recycled wall panels are: 1. Patent document CN105291234B discloses a method for producing sandwich composite wall panels using waste bamboo plywood, "a method for producing sandwich composite wall panels using waste bamboo plywood that is easy to process, saves costs and improves quality. It includes the following steps: 1) washing and drying the waste bamboo plywood, and obtaining recycled bamboo chips and recycled bamboo powder through cutting, crushing and screening; 2) preparing recycled bamboo plywood; 3) using recycled bamboo plywood to prepare a pair of panels and a number of connecting strips of a sandwich composite wall panel to obtain a skeleton; 4) placing the sandwich composite wall panel skeleton with an interface agent applied to the inner surface in a vertical mold, injecting foamed bamboo powder concrete slurry, and obtaining a sandwich composite wall panel after foaming, pre-curing, demoulding, curing, drying and protective treatment. The structure of the present invention is more uniform and dense, which improves the strength and durability of the bamboo plywood; fully utilizes bamboo and its waste to improve the utilization rate. The present invention has the characteristics of no deformation, high strength, high bamboo utilization rate and long service life", but the existing wallboards of recycled wallboards from construction waste have low crack resistance and cannot be guaranteed for safety; 2. Patent document CN115126116B discloses a crack-resistant construction waste recycled concrete wall panel, "including an outer panel, the front of the outer panel is installed with an inner panel, and the inner panel and the outer panel are inlaid with a plurality of steel bars. The present invention is installed with steel bars, and the staff needs to fix a plurality of sleeves on the outer side of the steel bars by bolts when producing the recycled concrete wall panel, so that the cross bar is connected with the steel bar by the sleeve, and the steel bars and cross bars are combined to make the steel bars and cross bars firmly support the fixed net, and then the combined steel bars, cross bars and fixed nets are placed inside the outer panel and the inner panel to produce the pressing device, the steel bars and cross bars cooperate to increase the transverse and longitudinal strength of the inner panel and the outer panel, and the fixed net can reinforce the internal structure of the inner panel and the outer panel, and can mutually conduct and consume profits, so that the crack resistance of the outer panel and the inner panel can be better", but the existing construction waste recycled wall panels have low crack resistance and their safety is not guaranteed; 3. Patent document CN113429170B discloses a crack-resistant construction waste recycled concrete wallboard, "including a wallboard assembly, the wallboard assembly includes a wallboard body, the wallboard body includes a fireproof layer and a concrete layer, the concrete layer is made of the following raw materials: 22-34 parts of recycled coarse aggregate, 33-43 parts of recycled fine aggregate, 46-72 parts of crack-resistant cement, 1-13 parts of steel fiber, 1-3 parts of water reducer, 1-4 parts of reinforcing agent, 5-9 parts of mineral powder, 5-8 parts of nano-silicon dioxide, and 120-230 parts of water. The present invention can greatly increase the crack resistance of the concrete layer; improve the fluidity of the concrete mixture, and has strong economic benefits; can improve the durability and wear resistance of the concrete surface; can realize the role of wallboard installation limit, and is convenient for installation", but the existing construction waste recycled wallboard has low crack resistance and its safety is not guaranteed; 4. Patent document CN220058543U discloses a multi-layer assembled lightweight wall panel made of recycled construction waste, "including a wall panel body, a first fixed side panel, and a second fixed side panel. One end of the wall panel body is fixed to the first fixed side panel, and the other end of the wall panel body is fixed to the second fixed side panel. The wall panel body includes a fireproof layer, a waterproof layer, a recycled construction waste sound insulation layer, and a recycled construction waste aerated concrete layer. Both sides of the recycled construction waste aerated concrete layer are fixed to one end of a recycled construction waste sound insulation layer, and the other end of each recycled construction waste sound insulation layer is fixed to one end of a waterproof layer, and the other end of each waterproof layer is fixed to a fireproof layer. The utility model can be conveniently transported, installed, and low in cost", but the existing recycled construction waste wall panels have low crack resistance and cannot be guaranteed. Summary of the invention

[0004] The object of the present invention is to provide a crack-resistant construction waste recycled wallboard and a preparation method thereof, so as to solve the technical problem in the above-mentioned background technology that the crack resistance of the construction waste recycled wallboard is not high and the safety cannot be guaranteed.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for preparing a crack-resistant construction waste recycled wallboard, comprising the following steps: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 50-65 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano-silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The crack-resistant cement includes the following parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 10-15 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are put into a reactor and stirred at a temperature of 35-45° C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rested for 10 minutes, the reactor is stirred again for 15 minutes to make the crack-resistant cement.

[0006] Preferably, the particle diameter of the recycled coarse aggregate is 6-9 mm, the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano-silica is 10-30 nanometers, and the stone powder is quartz powder.

[0007] Preferably, the formed wall panel raw materials in step S3 are poured into a recycled wall panel mold, the wall panel raw materials in the mold are vibrated in the wall panel mold by a vibrating rod, and the mold is placed in a drying room, the temperature in the drying room is 50-60°C, and the drying time in the drying room is 60 minutes. The drying time in the drying room is 60 minutes and then resting for 60 minutes. After the drying room is resting for 60 minutes, it is dried again at 60-80°C for 80 minutes. After drying in the drying room, a preliminary recycled wall panel is produced.

[0008] Preferably, the wallboard raw material in the mold is compacted in the wallboard mold by a compactor.

[0009] Preferably, a steel mesh is provided in the mold, and the steel mesh is in a diamond shape.

[0010] Preferably, the preliminary recycled wallboard is cut to size by a cutting machine, and finally made into recycled wallboard after size cutting.

[0011] Preferably, after demoulding, the surface of the recycled wallboard is polished by a grinder, and after the polishing is completed, a crack-resistant construction waste recycled wallboard is finally obtained.

[0012] Preferably, the grinding sandpaper of the grinder is 1500 mesh, and the rotation speed of the grinder is 600 revolutions per minute.

[0013] Preferably, the polymer is one of dispersible rubber powder and HPMC.

[0014] Preferably, the binder of the mortar is one of ridge clay, bentonite and sepiolite.

[0015] Preferably, the wall panel comprises a panel body, and the panel body is a crack-resistant recycled construction waste wall panel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention comprises the following wallboard raw materials in parts by weight, 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 60 parts of crack-resistant cement, 15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash, and the raw materials in step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor, stirred at a temperature of 40-45°C, the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then left to stand for 10 minutes. After that, the reactor is stirred again for 15 minutes to prepare the raw material for forming the wallboard in step S3. The crack-resistant cement includes the following parts by weight: 60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 18 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are placed in a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then stopped for 10 minutes, the reactor is stirred again for 15 minutes to prepare the crack-resistant cement. The crack resistance of the wallboard of the construction waste recycled wallboard is high and the safety is greatly improved; 2. The present invention is provided with wallboard raw materials including the following parts by weight: 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 60 parts of crack-resistant cement, 15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano-silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash. The raw materials in step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor, stirred at a temperature of 40-45°C, the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes. The raw material for forming wallboard in step S3 is prepared in 20 minutes. The crack-resistant cement includes the following parts by weight: 60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 18 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are put into a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then left to stand for 10 minutes, the reactor is stirred again for 15 minutes to prepare the crack-resistant cement. The wallboard density of the recycled wallboard from construction waste is significantly improved, which improves the quality of the wallboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the experimental data results of the present invention.

[0018] In the figure: 1. Plate body. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example 1: Please refer to Figure 1 The present invention provides an embodiment: a method for preparing a crack-resistant building waste recycled wallboard, comprising the following steps: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 35 parts of recycled coarse aggregate, 45 parts of recycled fine aggregate, 55 parts of crack-resistant cement, 5 parts of steel fiber, 2 parts of water reducer, 4 parts of nano-silicon dioxide, 110 parts of water, 16 parts of stone powder, and 12 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The crack-resistant cement comprises the following parts by weight: 55 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 11 parts of mortar binder, 3 parts of polypropylene fiber, 7 parts of polymer, and 100-120 parts of water. The above materials are placed in a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rests for 10 minutes, the reactor is stirred again for 15 minutes to prepare the crack-resistant cement. The particle diameter of the recycled coarse aggregate is 6-9 mm, the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano silicon dioxide is 10-30 nanometers, and the stone powder is quartz powder. The molded wallboard raw material in step S3 is poured into the recycled wallboard mold, and the wallboard raw material in the mold is vibrated in the wallboard mold by a vibrating rod. The mold is placed in a drying room, and the temperature in the drying room is 50-6 0℃, the drying time in the drying chamber is 60 minutes, the drying time in the drying chamber is 60 minutes and then the drying time is 60 minutes of rest, and the drying chamber is rested for 60 minutes and then dried again at 60-80℃ for 80 minutes. After the drying in the drying chamber is completed, a preliminary recycled wallboard is made, the wallboard raw material in the mold is compacted in the wallboard mold by a compactor, and a steel mesh is provided in the mold, and the steel mesh is in a diamond shape. The preliminary recycled wallboard is cut to size by a cutting machine, and the recycled wallboard is finally made after the size cutting. After the recycled wallboard is demoulded, the surface of the recycled wallboard is polished by a grinder, and after the polishing is completed, a crack-resistant construction waste recycled wallboard is finally obtained, the grinding sandpaper of the grinder is 1500 mesh, and the rotation speed of the grinder is 600 revolutions per minute, the polymer is one of dispersible rubber powder and HPMC, the binder of the mortar is one of ridge clay, bentonite, and sepiolite, and the wallboard includes a board body 1, and the board body 1 is a crack-resistant construction waste recycled wallboard.

[0023] Example 2: Please refer to Figure 1 The present invention provides an embodiment: a method for preparing a crack-resistant building waste recycled wallboard, comprising the following steps: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 40 parts of recycled coarse aggregate, 50 parts of recycled fine aggregate, 60 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano-silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The crack-resistant cement comprises the following parts by weight: 52 parts of cement, 54 parts of sand, 70-90 parts of perlite, 10-15 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are placed in a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rests for 10 minutes, the reactor is stirred again for 15 minutes to prepare the crack-resistant cement. The particle diameter of the recycled coarse aggregate is 6-9 mm, the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano-silicon dioxide is 10-30 nanometers, and the stone powder is quartz powder. The molded wallboard raw material in step S3 is poured into the recycled wallboard mold, the wallboard raw material in the mold is vibrated in the wallboard mold by a vibrating rod, and the mold is placed in a drying room, and the temperature in the drying room is 50 ~60℃, the drying time in the drying chamber is 60 minutes, the drying time in the drying chamber is 60 minutes and then the drying time is stationary for 60 minutes, the drying chamber is stationary for 60 minutes and then the drying is again dried at 60~80℃ for 80 minutes, and the preliminary recycled wallboard is made after the drying in the drying chamber is completed, the wallboard raw material in the mold is compacted in the wallboard mold by a compactor, the mold is provided with a steel mesh, and the steel mesh is diamond-shaped, the preliminary recycled wallboard is cut to size by a cutting machine, and the recycled wallboard is finally made after the size cutting, the recycled wallboard is demoulded and the surface of the recycled wallboard is polished by a grinder, and the crack-resistant construction waste recycled wallboard is finally obtained after the polishing, the polishing sandpaper of the grinder is 1500 mesh, the rotation speed of the grinder is 600 revolutions per minute, the polymer is one of dispersible rubber powder and HPMC, the binder of the mortar is one of ridge clay, bentonite, and sepiolite, and the wallboard includes a board body 1, and the board body 1 is a crack-resistant construction waste recycled wallboard.

[0024] Example 3: Please refer to Figure 1 The present invention provides an embodiment: a method for preparing a crack-resistant building waste recycled wallboard, comprising the following steps: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 33 parts of recycled coarse aggregate, 48 parts of recycled fine aggregate, 50-65 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano-silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The anti-cracking cement comprises the following parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 13 parts of mortar binder, 3 parts of polypropylene fiber, 7 parts of polymer, and 100-120 parts of water. The above materials are placed in a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rests for 10 minutes, the reactor is stirred again for 15 minutes to prepare the anti-cracking cement. The particle diameter of the recycled coarse aggregate is 6-9 mm, the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano silicon dioxide is 10-30 nanometers, and the stone powder is quartz powder. The formed wallboard raw material in step S3 is poured into the recycled wallboard mold, the wallboard raw material in the mold is vibrated in the wallboard mold by a vibrating rod, and the mold is placed in a drying room, and the temperature in the drying room is 50 ~60℃, the drying time in the drying chamber is 60 minutes, the drying time in the drying chamber is 60 minutes and then the drying time is stationary for 60 minutes, the drying chamber is stationary for 60 minutes and then the drying is again dried at 60~80℃ for 80 minutes, and the preliminary recycled wallboard is made after the drying in the drying chamber is completed, the wallboard raw material in the mold is compacted in the wallboard mold by a compactor, the mold is provided with a steel mesh, and the steel mesh is diamond-shaped, the preliminary recycled wallboard is cut to size by a cutting machine, and the recycled wallboard is finally made after the size cutting, the recycled wallboard is demoulded and the surface of the recycled wallboard is polished by a grinder, and the crack-resistant construction waste recycled wallboard is finally obtained after the polishing, the polishing sandpaper of the grinder is 1500 mesh, the rotation speed of the grinder is 600 revolutions per minute, the polymer is one of dispersible rubber powder and HPMC, the binder of the mortar is one of ridge clay, bentonite, and sepiolite, and the wallboard includes a board body 1, and the board body 1 is a crack-resistant construction waste recycled wallboard.

[0025] Example 4: Please refer to Figure 1 The present invention provides an embodiment: a method for preparing a crack-resistant building waste recycled wallboard, comprising the following steps: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 60 parts of crack-resistant cement, 15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The crack-resistant cement comprises the following parts by weight: 60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 18 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are placed in a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rests for 10 minutes, the reactor is stirred again for 15 minutes to prepare the crack-resistant cement. The particle diameter of the recycled coarse aggregate is 6-9 mm, the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano silicon dioxide is 10-30 nanometers, and the stone powder is quartz powder. The molded wallboard raw material in step S3 is poured into the recycled wallboard mold, the wallboard raw material in the mold is vibrated in the wallboard mold by a vibrating rod, and the mold is placed in a drying room. The temperature in the drying room is 50 ~60℃, the drying time in the drying chamber is 60 minutes, the drying time in the drying chamber is 60 minutes and then the drying time is stationary for 60 minutes, the drying chamber is stationary for 60 minutes and then the drying is again dried at 60~80℃ for 80 minutes, and the preliminary recycled wallboard is made after the drying in the drying chamber is completed, the wallboard raw material in the mold is compacted in the wallboard mold by a compactor, the mold is provided with a steel mesh, and the steel mesh is diamond-shaped, the preliminary recycled wallboard is cut to size by a cutting machine, and the recycled wallboard is finally made after the size cutting, the recycled wallboard is demoulded and the surface of the recycled wallboard is polished by a grinder, and the crack-resistant construction waste recycled wallboard is finally obtained after the polishing, the polishing sandpaper of the grinder is 1500 mesh, the rotation speed of the grinder is 600 revolutions per minute, the polymer is one of dispersible rubber powder and HPMC, the binder of the mortar is one of ridge clay, bentonite, and sepiolite, and the wallboard includes a board body 1, and the board body 1 is a crack-resistant construction waste recycled wallboard.

[0026] Example 5: Please refer to Figure 1 The present invention provides an embodiment: a method for preparing a crack-resistant building waste recycled wallboard, comprising the following steps: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 30-45 parts of recycled coarse aggregate, 53 parts of recycled fine aggregate, 58 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano-silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The crack-resistant cement comprises the following parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 11 parts of mortar binder, 5 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are placed in a reactor and stirred at a temperature of 35-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rested for 10 minutes, the reactor is stirred again for 15 minutes to prepare the crack-resistant cement. The particle diameter of the recycled coarse aggregate is 6-9 mm, the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano-silicon dioxide is 10-30 nanometers, and the stone powder is quartz powder. The molded wallboard raw material in step S3 is poured into the recycled wallboard mold, the wallboard raw material in the mold is vibrated in the wallboard mold by a vibrating rod, and the mold is placed in a drying room. The temperature in the drying room is 5 0~60℃, the drying time in the drying chamber is 60 minutes, the drying time in the drying chamber is 60 minutes and then it is stationary for 60 minutes, and the drying chamber is stationary for 60 minutes and then it is dried again at 60~80℃ for 80 minutes. After the drying in the drying chamber is completed, a preliminary recycled wallboard is made, the wallboard raw material in the mold is compacted in the wallboard mold by a compactor, and a steel mesh is provided in the mold, and the steel mesh is in a diamond shape. The preliminary recycled wallboard is cut to size by a cutting machine, and the recycled wallboard is finally made after the size cutting. After the recycled wallboard is demoulded, the surface of the recycled wallboard is polished by a grinder, and after the polishing is completed, a crack-resistant construction waste recycled wallboard is finally obtained, the grinding sandpaper of the grinder is 1500 mesh, and the rotation speed of the grinder is 600 revolutions per minute, the polymer is one of dispersible rubber powder and HPMC, the binder of the mortar is one of ridge clay, bentonite, and sepiolite, and the wallboard includes a board body 1, and the board body 1 is a crack-resistant construction waste recycled wallboard.

[0027] Comparative experiment: The difference between Comparative Example 1 and Example 1 is that; 35 parts of recycled coarse aggregate, 45 parts of recycled fine aggregate, 55 parts of crack-resistant cement, 5 parts of steel fiber, 2 parts of water reducer, 4 parts of nano-silicon dioxide, 110 parts of water, 16 parts of stone powder, and 12 parts of fly ash. The raw materials of step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor and stirred at a temperature of 40-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then stands for 10 minutes, the reactor is stirred again for 15 minutes to prepare the molded wallboard raw materials in step S3. The crack-resistant cement includes the following parts by weight: 55 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 11 parts of mortar binder, 3 parts of polypropylene fiber, 7 parts of polymer, and 100-120 parts of water.

[0028] The difference between Comparative Example 1 and Example 2 is that; 40 parts of recycled coarse aggregate, 50 parts of recycled fine aggregate, 60 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, 10-18 parts of fly ash. The raw materials of step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor and stirred at a temperature of 40-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then stopped for 10 minutes, the reactor is stirred again for 15 minutes to prepare the molded wallboard raw materials in step S3. The crack-resistant cement includes the following parts by weight: 52 parts of cement, 54 parts of sand, 70-90 parts of perlite, 10-15 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water.

[0029] The difference between Comparative Example 1 and Example 3 is that; 33 parts of recycled coarse aggregate, 48 parts of recycled fine aggregate, 50-65 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash. The raw materials of step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor and stirred at a temperature of 40-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then stopped for 10 minutes, the reactor is stirred again for 15 minutes to prepare the molded wallboard raw materials in step S3. The crack-resistant cement includes the following parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 13 parts of mortar binder, 3 parts of polypropylene fiber, 7 parts of polymer, and 100-120 parts of water.

[0030] The difference between Comparative Example 1 and Example 4 is that; 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 60 parts of crack-resistant cement, 15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash. The raw materials of step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor and stirred at a temperature of 40-45°C for 20 minutes. After the reactor is stirred for 20 minutes and then stopped for 10 minutes, the reactor is stirred again for 15 minutes to prepare the molded wallboard raw materials in step S3. The crack-resistant cement includes the following parts by weight: 60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 18 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water.

[0031] The difference between Comparative Example 1 and Example 5 is that; 30-45 parts of recycled coarse aggregate, 53 parts of recycled fine aggregate, 58 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash. The raw materials in step S2 are mixed as follows: the wallboard raw materials in step S1 are put into a reactor and stirred at a temperature of 40-45°C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then stands for 10 minutes, the reactor is stirred again for 15 minutes to prepare the molded wallboard raw materials in step S3. The crack-resistant cement includes the following parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 11 parts of mortar binder, 5 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water.

[0032] The construction waste recycled wallboards of Examples 1, 2, 3, 4 and 5 of the present invention and the conventional construction waste recycled wallboards (Comparative Example 1) were subjected to wallboard density and wallboard cracking strength tests, and statistical values ​​were calculated. The results are shown in the table:

[0033] From the data in the table, it can be seen that the wallboard densities of the construction waste recycled wallboards in Example 1, Example 2, Example 3, Example 4 and Example 5 of the present invention are 1662, 1650, 1620, 1640 and 1630 respectively, which are significantly higher than the wallboard density of the construction waste recycled wallboard in Comparative Example 1. Therefore, it is shown that the wallboard density of the construction waste recycled wallboard of the present invention is significantly improved, and the quality of the wallboard is improved; From the data in the table, it can be seen that the crack resistance of the wallboards using the construction waste recycled wallboards in Example 1, Example 2, Example 3, Example 4 and Example 5 of the present invention are 1.5, 1.4, 1.5, 1.6 and 1.5 respectively, which are significantly higher than the crack resistance of the wallboards using the construction waste recycled wallboards in Comparative Example 1. This indicates that the crack resistance of the wallboards using the construction waste recycled wallboards of the present invention is high and the safety is greatly improved.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for preparing crack-resistant construction waste recycled wallboard, characterized in that: The following steps are involved: Step S1: raw material preparation; Step S2: mixing raw materials; Step S3: forming wallboard raw materials; Step S4: curing the wallboard; Step S5: wall panel cutting and forming; In step S1, the construction waste is crushed into recycled coarse aggregate and recycled fine aggregate, including the following wallboard raw materials in parts by weight: 30-45 parts of recycled coarse aggregate, 40-55 parts of recycled fine aggregate, 50-65 parts of crack-resistant cement, 5-15 parts of steel fiber, 2-6 parts of water reducer, 3-8 parts of nano-silicon dioxide, 105-120 parts of water, 15-30 parts of stone powder, and 10-18 parts of fly ash; The raw material mixing in step S2 is as follows: the wallboard raw material in step S1 is put into a reactor, stirred at a temperature of 40-45° C., the reactor is stirred for 20 minutes, the reactor is stirred for 20 minutes and then rested for 10 minutes, and the reactor is stirred again for 15 minutes to prepare the shaped wallboard raw material in step S3; The crack-resistant cement includes the following parts by weight: 50-60 parts of cement, 40-60 parts of sand, 70-90 parts of perlite, 10-15 parts of mortar binder, 2-6 parts of polypropylene fiber, 6-9 parts of polymer, and 100-120 parts of water. The above materials are put into a reactor and stirred at a temperature of 35-45° C. The reactor is stirred for 20 minutes. After the reactor is stirred for 20 minutes and then rested for 10 minutes, the reactor is stirred again for 15 minutes to make the crack-resistant cement.

2. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 1, characterized in that: The particle diameter of the recycled coarse aggregate is 6-9 mm, the particle diameter of the recycled fine aggregate is 2.2-4 mm, the aspect ratio of the steel fiber is 40-55, the water reducer is a polycarboxylate water reducer, the particle size range of the nano silicon dioxide is 10-30 nanometers, and the stone powder is quartz powder.

3. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 1, characterized in that: The formed wallboard raw materials in step S3 are poured into the recycled wallboard mold, and the wallboard raw materials in the mold are vibrated in the wallboard mold by a vibrating rod, and the mold is placed in a drying room, the temperature in the drying room is 50-60°C, and the drying time in the drying room is 60 minutes. The drying time in the drying room is 60 minutes and then it is left to stand for 60 minutes. After the drying room is left to stand for 60 minutes, it is dried again at 60-80°C for 80 minutes. After the drying in the drying room is completed, a preliminary recycled wallboard is produced.

4. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 3, characterized in that: The wallboard raw material in the mold is compacted in the wallboard mold by a compactor.

5. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 4, characterized in that: A steel mesh is arranged in the mold, and the steel mesh is in a diamond shape.

6. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 5, characterized in that: The preliminary recycled wallboard is cut into size by a cutting machine, and finally made into recycled wallboard after the size cutting.

7. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 6, characterized in that: After the recycled wallboard is demoulded, the surface of the recycled wallboard is polished by a grinder, and after the polishing is completed, the crack-resistant construction waste recycled wallboard is finally obtained.

8. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 7, characterized in that: The grinding sandpaper of the grinding machine has 1500 meshes, and the rotating speed of the grinding machine is 600 revolutions per minute.

9. The method for preparing a crack-resistant construction waste recycled wallboard according to claim 1, characterized in that: The polymer is one of dispersible rubber powder and HPMC.

10. The method for preparing a crack-resistant recycled building waste wallboard according to claim 1, characterized in that: The binder of the mortar is one of ridge clay, bentonite and sepiolite.

11. A crack-resistant construction waste recycled wallboard, applicable to the method for preparing a crack-resistant construction waste recycled wallboard according to any one of claims 1 to 9, characterized in that: The wall panel comprises a panel body (1), and the panel body (1) is a crack-resistant building waste recycled wall panel.

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