A meander-like UHPC decorative plate and a preparation method thereof

Abstract

The application discloses a cloud pattern UHPC decorative plate, characterized in that the cloud pattern UHPC decorative plate comprises the following components: a UHPC base material, a light-color UHPC color material and a dark-color UHPC color material, and the mass ratio of the UHPC base material, the light-color UHPC color material and the dark-color UHPC color material is (96-98):(2-4):(2-4). In addition, the application further discloses a preparation method of the cloud pattern UHPC decorative plate. The cloud pattern UHPC decorative plate prepared by the preparation method has the advantages of green environmental protection, high mechanical strength of the UHPC plate, excellent durability and long-term performance, natural and realistic texture, and the like. The air holes in the base body are maximally eliminated through vacuumizing and high-frequency vibration, the density is improved, and the forming decorative surface after demolding does not need to be subjected to surface treatment such as polishing and polishing of the decorative surface.

Description

Technical Field

[0001] This invention belongs to the field of building technology, specifically relating to a cloud-patterned UHPC decorative panel and its preparation method. Background Technology

[0002] Stone is widely used in interior and exterior building decoration. Decorative natural stones, such as granite, marble, and marble slabs, are favored by architects and the general public for their noble, elegant, natural, and rustic style, as well as their hardness and durability. However, stone is a non-renewable resource, and its extraction severely damages the ecological environment. With the increasing emphasis placed on natural resources and energy conservation by the state, relevant laws and regulations are becoming increasingly stringent, leading to a continuous rise in the cost and price of stone extraction.

[0003] Ultra-high performance concrete (UHPC) is a white silicate cement (P.W42.5 grade and above) with a whiteness ≥89, characterized by extremely high mechanical properties, excellent durability, and superior volume stability. To achieve these superior mechanical and durability properties, UHPC utilizes highly reactive admixtures such as white silica fume and an extremely low water-cement ratio. It almost entirely avoids coarse aggregates, instead employing quartz sand or even quartz powder with a particle size less than 1.0 mm to eliminate interfacial defects between the aggregate and the binder. Using UHPC in building decorative panels can significantly extend the lifespan of the building's "outer garment," achieving a lifespan comparable to that of the building itself.

[0004] UHPC is currently being used to make architectural decorative panels (the publicly disclosed technologies are CN115073088A, CN115057677A, and CN107555905A). However, when using the UHPC casting method to make decorative panels, it is impossible to achieve the texture of imitation stone, especially the appearance effect of cloud-patterned stone. Currently, no one has proposed a relevant material formula and process method to achieve this. Summary of the Invention

[0005] This invention provides a cloud-patterned UHPC decorative panel to solve the technical problem that existing UHPC decorative panel materials cannot be used to create stone-like patterns, and require a combination of advantages such as high mechanical strength, excellent durability and long-term performance, natural and realistic texture, and the appearance effect of cloud-patterned stone.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a cloud-patterned UHPC decorative panel, characterized in that it comprises the following components: UHPC base material, light-colored UHPC pigment and dark-colored UHPC pigment, and the UHPC base material, the light-colored UHPC pigment and the dark-colored UHPC pigment are mixed in a mass ratio of (96-98):(2-4):(2-4).

[0007] The UHPC base material comprises the following components by weight: 60-80 parts of white silicate cement with PW 42.5 or higher and whiteness ≥ 89; 5-10 parts of white silica fume; 10-20 parts of ultrafine active powder; 3-10 parts of titanium dioxide; 80-150 parts of quartz sand with whiteness ≥ 93; 1.5-2.5 parts of plasticizer; 0.005-0.01 parts of defoamer; 17-23 parts of water; 1-3 parts of reinforcing fiber; and 0.1-0.3 parts of pigment.

[0008] The light-colored UHPC pigment, by weight, comprises the following components: 60-80 parts of white silicate cement with a PW of 42.5 or higher and a whiteness ≥89; 5-10 parts of white silica fume; 10-20 parts of ultrafine active powder; 3-10 parts of titanium dioxide; 80-150 parts of quartz sand with a whiteness ≥93; 1.5-2.5 parts of plasticizer; 0.005-0.01 parts of defoamer; and 17-23 parts of water.

[0009] The dark-colored UHPC pigment, by weight, comprises the following components: 60-80 parts of white silicate cement with a PW of 42.5 or higher and a whiteness ≥89; 5-10 parts of white silica fume; 10-20 parts of ultrafine active powder; 3-10 parts of titanium dioxide; 80-150 parts of quartz sand with a whiteness ≥93; 1.5-2.5 parts of plasticizer; 0.005-0.01 parts of defoamer; 17-23 parts of water; and 1-3 parts of pigment.

[0010] By adopting the above solution, the present invention provides a novel material for cloud-patterned UHPC decorative panels. This material has undergone extensive experimental formulation and optimization of its compound components and proportions, enabling the cloud-patterned UHPC decorative panel material to simultaneously possess the advantages of being environmentally friendly, having high mechanical strength, excellent durability and long-term performance of UHPC panels, and exhibiting natural and realistic textures, achieving the aesthetic effect of cloud-patterned stone.

[0011] Those skilled in the art know that improving a particular aspect of the performance of a decorative panel material is relatively easy; it can be achieved by adjusting one of its components through a limited number of experiments. However, in reality, improving one aspect of performance inevitably leads to a decline in other aspects. To achieve the superior performance of the cloud-patterned UHPC decorative panel material described in this invention, it is difficult to achieve by adjusting a single component. It is essential to grasp the overall formulation of the cloud-patterned UHPC decorative panel material, comprehensively compounding each component and adjusting its dosage. Improper compounding or dosage of any single component will prevent the cloud-patterned UHPC decorative panel material from achieving the comprehensive performance of this invention. The novel overall formulation and proportioning of this invention are precisely the inventive point of this invention.

[0012] Preferably, the white silicate cement is PW 52.5 grade;

[0013] Or / and the ultrafine active powder is one or more of the following: ultrafine mineral powder, ultrafine fly ash, metakaolin, and limestone powder;

[0014] Or / and the quartz sand comprises the following components by weight: 40-50 parts of 40-70 mesh quartz sand, 25-35 parts of 70-100 mesh quartz sand, 15-25 parts of 100-150 mesh quartz sand, and 5-10 parts of 150-200 mesh quartz sand.

[0015] Or / and the plasticizer is a polycarboxylate high-performance water-reducing agent with a water reduction rate of 35%;

[0016] Or / and the defoamer is an organosilicone defoamer;

[0017] Or / and the reinforcing fiber is one or more of polypropylene fiber (PP), polyvinyl alcohol fiber (PVA), polyoxymethylene fiber (POM), and glass fiber;

[0018] Or / and the pigment is an iron oxide pigment.

[0019] Another object of the present invention is to provide a method for preparing the above-mentioned cloud-patterned UHPC decorative panel, characterized by comprising the following steps:

[0020] S1 Preparation of UHPC Base Material: Weigh each raw material component of UHPC base material according to the formula and mix them evenly;

[0021] S2 Preparation of light-colored UHPC pigment: Weigh each raw material component of the light-colored UHPC pigment according to the formula and mix them evenly;

[0022] S3 Production of Dark UHPC Pigment: Weigh each raw material component of dark UHPC pigment according to the formula and mix them evenly;

[0023] S4 Mixing and Color Matching: First, place the UHPC base material in a round basin-shaped container. Then, sprinkle the light-colored UHPC colorant and the dark-colored UHPC colorant on the surface of the UHPC base material respectively. Use a stirring tool to stir back and forth from the surface to the bottom of the UHPC base material 3-7 times until the two colorants are evenly distributed in the UHPC base material and the color boundaries are maintained.

[0024] S5 Casting: The mixture prepared in step S4 is cast into the mold, so that the mixture is evenly distributed in the mold after flowing;

[0025] S6 Vacuuming and Vibration Treatment: The mold after casting in step S5 is moved into a molding chamber that can be vacuumed and vibrated at high frequency. First, vacuum is applied and then high frequency vibration is applied.

[0026] S7 Curing and Molding: After initial setting, the film is covered for curing. After curing for 12-36 hours, it is moved into the steam curing chamber and steam cured for 36-52 hours before demolding. After demolding, it continues to be naturally cured for 5-10 days to obtain cloud-patterned UHPC decorative panels.

[0027] Preferably, step S1, which involves preparing the UHPC base material, specifically includes the following steps:

[0028] Preferably, step S1, when preparing the UHPC base material, includes the following steps:

[0029] A1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 20-30 rad / min for 5-10 minutes.

[0030] A2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step A1. Stir at a speed of 40-60 rad / min for 4-6 minutes.

[0031] A3. Weigh the pigments according to the proportions and add them to the mixture in step A2. Stir evenly at a stirring speed of 40-60 rad / min for 2-4 minutes.

[0032] A4. Weigh the reinforcing fibers according to the ratio, add them to the mixture in step A3, and stir evenly at a stirring speed of 40-60 rad / min for 2-4 min.

[0033] Preferably, step S2, when preparing a light-colored UHPC pigment, includes the following steps:

[0034] B1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 20-30 rad / min for 5-10 minutes.

[0035] B2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step B1. Stir at a speed of 40-60 rad / min for 4-6 minutes.

[0036] Preferably, step S3, when producing dark-colored UHPC pigment, includes the following steps:

[0037] C1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 20-30 rad / min for 5-10 min.

[0038] C2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step C1. Stir at a speed of 40-60 rad / min for 4-6 minutes.

[0039] C3. Weigh the pigments according to the proportions and add them to the mixture in step C2. Stir evenly at a stirring speed of 40-60 rad / min for 2-4 minutes.

[0040] Preferably, in step S6, the mold is vibrated at a frequency of 100 times / s for 20-60s in a vacuum of 0.05-0.12MPa on a high-frequency vibration table.

[0041] Preferably, in step S7, after initial curing, the material is covered and cured for 24 hours, then moved into a steam curing chamber for 48 hours of steam curing before demolding. After demolding, the material continues to be naturally cured for 7 days to obtain a cloud-patterned UHPC decorative panel.

[0042] Preferably, the steam curing process in step S7 is as follows: heating for 2 hours - maintaining a constant temperature for 44 hours - cooling for 2 hours; and the constant temperature is 50-60℃.

[0043] Preferably, in step S5, the bottom mold of the mold is made of PVC rigid plastic board, and the PVC rigid plastic board meets the requirement that the flatness is no more than 1 mm per meter and the gloss is not less than 80.

[0044] The beneficial effects of this invention are:

[0045] The cloud-patterned UHPC decorative panel preparation method of this invention has the advantages of being green and environmentally friendly, having high mechanical strength, excellent durability and long-term performance of UHPC panels, natural and realistic texture, and maximizing the elimination of pores in the matrix by vacuuming and high-frequency vibration to improve density. Moreover, the decorative surface formed after demolding does not require surface treatment such as grinding and polishing. Attached Figure Description

[0046] Figure 1 This is a picture of a product sample made in Example 1.

[0047] Figure 2 This is a picture of the product sample made according to Comparative Example 4.

[0048] Figure 3 This is a picture of a product sample made according to Comparative Example 1.

[0049] Figure 4 This is a picture of the product sample made in Comparative Example 2. Detailed Implementation

[0050] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0051] Example 1: This example provides a cloud-patterned UHPC decorative panel, which, by weight, comprises the following three components: UHPC base material, light-colored UHPC pigment, and dark-colored UHPC pigment, and the mass ratio of the UHPC base material, the light-colored UHPC pigment, and the dark-colored UHPC pigment is 97:3:3.

[0052] The UHPC base material comprises the following components by weight: 70 parts of white silicate cement with P.W52.5 and whiteness ≥89; 8 parts of white silica fume; 15 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 5 parts of titanium dioxide; 100 parts of quartz sand with whiteness ≥93; 2 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.008 parts of defoamer (selected as organosilicon defoamer); 20 parts of water; 2 parts of reinforcing fiber (selected as polypropylene fiber); and 0.2 parts of iron oxide yellow pigment.

[0053] The light-colored UHPC pigment, by weight, comprises the following components: 70 parts of white silicate cement with PW 52.5 and whiteness ≥ 89; 8 parts of white silica fume; 15 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 5 parts of titanium dioxide; 100 parts of quartz sand with whiteness ≥ 93; 2 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.008 parts of defoamer (selected as organosilicon defoamer); and 20 parts of water.

[0054] The dark-colored UHPC pigment, by weight, comprises the following components: 70 parts of white silicate cement with PW 52.5 and whiteness ≥ 89; 8 parts of white silica fume; 15 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 5 parts of titanium dioxide; 100 parts of quartz sand with whiteness ≥ 93; 2 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.008 parts of defoamer (selected as organosilicon defoamer); 20 parts of water; and 2 parts of iron oxide yellow pigment.

[0055] The manufacturing process of the cloud-patterned UHPC decorative panel in this embodiment includes the following steps:

[0056] S1 Preparation of UHPC Base Material: Weigh each raw material component of UHPC base material according to the formula and mix them evenly;

[0057] S2 Preparation of light-colored UHPC pigment: Weigh each raw material component of the light-colored UHPC pigment according to the formula and mix them evenly;

[0058] S3 Production of Dark UHPC Pigment: Weigh each raw material component of dark UHPC pigment according to the formula and mix them evenly;

[0059] S4 Mixing and Color Matching: First, place the UHPC base material in a round basin-shaped container. Then, sprinkle the light-colored UHPC colorant and the dark-colored UHPC colorant on the surface of the UHPC base material respectively. Use a stirring tool to stir back and forth 5 times from the surface to the bottom of the UHPC base material to make the two colorants evenly distributed in the UHPC base material and maintain the color boundary.

[0060] S5 Casting: The mixture prepared in step S4 is cast into the mold, so that the mixture is evenly distributed in the mold after flowing; specifically, the bottom mold of the mold is made of PVC rigid plastic board and the PVC rigid plastic board meets the requirement that the flatness is not more than 1mm per meter and the gloss is not less than 80.

[0061] S6 Vacuuming and Vibration Treatment: The mold after casting in step S5 is moved into a molding chamber that can be vacuumed and vibrated at high frequency. First, a vacuum is drawn and then high frequency vibration is performed. Specifically, the mold is in a vacuum of 0.1 MPa and vibrates at a frequency of 100 times / s for 40 seconds on a high frequency vibration table.

[0062] S7 Curing and Molding: After initial solidification, a film is applied for curing. After 24 hours of curing, the material is moved into a steam curing chamber and steam-cured for 48 hours before demolding. After demolding, the material continues to be naturally cured for 7 days to obtain a cloud-patterned UHPC decorative panel. Specifically, the steam curing process is as follows: heating for 2 hours, maintaining a constant temperature for 44 hours, and cooling for 2 hours. The constant temperature is 55℃.

[0063] The step S1 of preparing the UHPC base material includes the following steps:

[0064] A1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 25 rad / min for 8 min.

[0065] A2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step A1. Stir at a speed of 55 rad / min for 5 minutes.

[0066] A3. Weigh the pigments according to the proportions and add them to the mixture in step A2. Stir evenly at a stirring speed of 55 rad / min for 3 minutes.

[0067] A4. Weigh the reinforcing fibers according to the ratio, add them to the mixture in step A3, and stir evenly at a stirring speed of 55 rad / min for 3 min.

[0068] The step S2, which involves producing a light-colored UHPC pigment, includes the following steps:

[0069] B1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 25 rad / min for 8 min.

[0070] B2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step B1. Stir at a speed of 55 rad / min for 5 minutes.

[0071] The step S3, which involves producing dark-colored UHPC pigment, includes the following steps:

[0072] C1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 25 rad / min for 8 min.

[0073] C2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step C1. Stir at a speed of 55 rad / min for 5 min.

[0074] C3. Weigh the pigments according to the proportions and add them to the mixture in step C2. Stir evenly at a stirring speed of 55 rad / min for 3 minutes.

[0075] The rad / min mentioned above is a commonly used unit of rotational speed, which stands for radians per minute.

[0076] Example 2: This example provides a cloud-patterned UHPC decorative panel, which, by weight, comprises the following three components: UHPC base material, light-colored UHPC pigment, and dark-colored UHPC pigment, and the mass ratio of the UHPC base material, the light-colored UHPC pigment, and the dark-colored UHPC pigment is 96:2:2.

[0077] The UHPC base material comprises the following components by weight: 60 parts of white silicate cement with P.W52.5 and whiteness ≥89; 5 parts of white silica fume; 10 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 3 parts of titanium dioxide; 80 parts of quartz sand with whiteness ≥93; 1.5 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.005 parts of defoamer (selected as organosilicon defoamer); 17 parts of water; 1 part of reinforcing fiber (selected as polypropylene fiber); and 0.1 parts of iron oxide yellow pigment.

[0078] The light-colored UHPC pigment, by weight, comprises the following components: 60 parts of white silicate cement with P.W52.5 and whiteness ≥89; 5 parts of white silica fume; 10 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 3 parts of titanium dioxide; 80 parts of quartz sand with whiteness ≥93; 1.5 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.005 parts of defoamer (selected as organosilicon defoamer); and 17 parts of water.

[0079] The dark-colored UHPC pigment, by weight, comprises the following components: 60 parts of white silicate cement with PW 52.5 or higher and whiteness ≥ 89; 5 parts of white silica fume; 10 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 3-10 parts of titanium dioxide; 80 parts of quartz sand with whiteness ≥ 93; 1.5 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.005 parts of defoamer (selected as organosilicon defoamer); 17 parts of water; and 1 part of iron oxide yellow pigment.

[0080] The process method in this embodiment 2 is the same as that in this embodiment 1.

[0081] Example 3: This example provides a cloud-patterned UHPC decorative panel, which, by weight, comprises the following three components: UHPC base material, light-colored UHPC pigment, and dark-colored UHPC pigment, and the mass ratio of the UHPC base material, the light-colored UHPC pigment, and the dark-colored UHPC pigment is 98:4:4.

[0082] The UHPC base material comprises the following components by weight: 80 parts of white silicate cement with P.W52.5 or higher and whiteness ≥89; 10 parts of white silica fume; 20 parts of 325-500 mesh ultrafine active powder (selected as ultrafine mineral powder); 10 parts of titanium dioxide; 150 parts of quartz sand with whiteness ≥93; 2.5 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.01 parts of defoamer (selected as organosilicon defoamer); 23 parts of water; 3 parts of reinforcing fiber (selected as polypropylene fiber); and 0.3 parts of iron oxide yellow pigment.

[0083] The light-colored UHPC pigment, by weight, comprises the following components: 80 parts of white silicate cement with PW 52.5 and whiteness ≥ 89; 10 parts of white silica fume; 20 parts of ultrafine active powder (selected as ultrafine mineral powder) of 325-500 mesh; 10 parts of titanium dioxide; 150 parts of quartz sand with whiteness ≥ 93; 2.5 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.01 parts of defoamer (selected as organosilicon defoamer); and 23 parts of water.

[0084] The dark-colored UHPC pigment, by weight, comprises the following components: 80 parts of white silicate cement with PW 52.5 and whiteness ≥ 89; 10 parts of white silica fume; 20 parts of ultrafine active powder (selected as ultrafine mineral powder) of 325-500 mesh; 10 parts of titanium dioxide; 150 parts of quartz sand with whiteness ≥ 93; 2.5 parts of plasticizer (selected as polycarboxylate high-performance water-reducing agent); 0.01 parts of defoamer (selected as organosilicon defoamer); 23 parts of water; and 3 parts of iron oxide yellow pigment.

[0085] The process method in this embodiment 3 is the same as that in this embodiment 1.

[0086] Comparative Example 1: Compared with Example 1, the only difference is that the mass ratio of the UHPC base material, light-colored UHPC pigment, and dark-colored UHPC pigment is 100:1:1. That is, by mass, there are 100 parts of the UHPC base material, 1 part of the light-colored UHPC pigment, and 1 part of the dark-colored UHPC pigment.

[0087] Comparative Example 2: Compared with Example 1, the only difference is that the mass ratio of the UHPC base material, light-colored UHPC colorant, and dark-colored UHPC colorant is 92:4:4. That is, by mass, it is 92 parts of UHPC base material, 4 parts of light-colored UHPC colorant, and 4 parts of dark-colored UHPC colorant.

[0088] Comparative Example 3: The difference from Example 1 is that the reinforcing fiber in the UHPC base material is replaced with PVC fiber, while the rest remains the same.

[0089] Comparative Example 4: The difference from Example 1 is that in the UHPC base material: the pigment is iron oxide gray pigment, and the ratio remains unchanged; in the dark UHPC colorant: the pigment is iron oxide gray pigment, and everything else remains unchanged.

[0090] Comparative Example 5: The difference from Example 1 is that in step S4, the color mixing is done as follows: First, the UHPC base material is placed in a round basin-shaped container, and then the light-colored UHPC pigment and the dark-colored UHPC pigment are sprinkled on the surface of the UHPC base material respectively. The mixture is stirred back and forth from the surface to the bottom of the UHPC base material twice to complete the color mixing.

[0091] Comparative Example 6: The difference from Example 1 is that in step S4, the color mixing is done as follows: First, the UHPC base material is placed in a round basin-shaped container, and then the light-colored UHPC pigment and the dark-colored UHPC pigment are sprinkled on the surface of the UHPC base material respectively. The mixture is stirred back and forth 9 times from the surface to the bottom of the UHPC base material using a stirring tool to complete the color mixing.

[0092] Comparative Example 7: The difference from Example 1 is that it does not include step S6, which involves vacuuming and vibration treatment.

[0093] Comparative Example 8: Compared with Example 1, the only difference is that the UHPC base material includes the following raw materials by weight: 50 parts white silicate cement (compared to 70 parts in Example 1), with other proportions remaining unchanged. The light-colored UHPC pigment includes the following raw materials by weight: 50 parts white silicate cement (compared to 70 parts in Example 1), with other proportions remaining unchanged. The dark-colored UHPC pigment includes the following raw materials by weight: 50 parts white silicate cement (compared to 70 parts in Example 1), with other proportions remaining unchanged.

[0094] Comparative Example 9: Compared with Example 1, the only difference is that the UHPC base material includes the following raw materials by weight: 200 parts of quartz sand with a whiteness of ≥93 (while in Example 1 it is 100 parts), and the rest remains the same.

[0095] Comparative Example 10: The only difference from Example 1 is that in step S5, the bottom mold of the mold is a conventional steel template.

[0096] The experimental results are shown in Table 1 below:

[0097]

[0098] From Table 1, the following conclusions can be drawn:

[0099] (1) In conjunction with Examples 1-3, and from Figure 1 It is understood that the present invention uses a novel cloud-patterned UHPC decorative panel material. This material has undergone extensive experimental formulation and optimization of its compound components and proportions, enabling the cloud-patterned UHPC decorative panel material to simultaneously possess the advantages of being environmentally friendly, having high mechanical strength and gloss of UHPC panels, and exhibiting natural and realistic textures, achieving the aesthetic effect of cloud-patterned stone.

[0100] (2) Combining with Comparative Examples 1-2, and from Figure 3 and Figure 4 It is evident that the ratio of the UHPC base material, light-colored UHPC pigment, and dark-colored UHPC pigment is crucial; too low or too high a ratio will directly affect the product's gloss and appearance.

[0101] (3) By comparing Comparative Example 3 and Example 1, it can be seen that the reinforcing fiber in the UHPC base material is PVC fiber, which can also meet the requirements. The formulation scheme of the present invention can be applied to different reinforcing fibers and has good adaptability.

[0102] (4) By comparing Comparative Example 4 and Example 1, and as shown in 2, it can be seen that:

[0103] In the UHPC base material: the pigment is iron oxide gray pigment, and the ratio remains unchanged; in the dark UHPC colorant: the pigment is iron oxide gray pigment, and the ratio remains unchanged. The material of this invention can meet the requirements of different colored pigments and can be controlled within the same ratio range. It can produce cloud pattern decorative effects of different colors and styles, and has good versatility and is very flexible.

[0104] (5) By comparing Comparative Examples 5-6 and Example 1, it can be seen that in step S4, the number of times the stirring tool stirs back and forth from the surface to the bottom of the UHPC base material is very critical. It is required that the stirring should not be insufficient or excessive. Insufficient stirring will lead to uneven distribution of pigments, which will ultimately result in discontinuous cloud patterns in the decorative effect. Excessive stirring will cause the pigments and base material to mix together, leaving only the same intermediate color mixture, which will seriously affect the quality of the product appearance.

[0105] (6) By comparing Comparative Example 7 and Example 1, it can be seen that the product obtained without step S6 is not ideal. Therefore, step S6, vacuuming and vibration treatment, is very important. By maximizing the elimination of pores in the matrix through vacuuming and high-frequency vibration, the density can be improved, which can significantly improve the gloss and appearance quality of the product.

[0106] (7) By comparing Comparative Example 8 and Example 1, the proportion of white silicate cement in UHPC base material, light-colored UHPC pigment and dark-colored UHPC pigment is reduced, which will not only affect the overall strength of the product and increase the water absorption rate, but also affect the appearance of the product.

[0107] (8) By comparing Comparative Example 9 and Example 1, it can be seen that when the content of quartz sand in the UHPC base material is too high (200 parts), it will seriously reduce the compressive strength, flexural strength, and tensile strength, increase the water absorption rate, and result in an unsatisfactory product. It will also have a combined effect on the appearance of the product.

[0108] (9) By comparing Comparative Example 10 and Example 1, it can be seen that when the bottom mold of the mold is made of PVC rigid plastic board and the PVC rigid plastic board meets the requirements of flatness not exceeding 1mm per meter and gloss not less than 80, the high flatness and high gloss of the bottom mold will seriously affect the gloss of the product, and the molded cloud-patterned UHPC decorative board will not require grinding, polishing or other decorative surface treatments after demolding. However, if conventional steel templates are used, the flatness and gloss are low, and grinding, polishing or other decorative surface treatments are required after demolding, which leads to more complicated processes and higher production costs.

[0109] Those skilled in the art know that improving a particular aspect of the performance of a decorative panel material is relatively easy; it can be achieved by adjusting one of its components through a limited number of experiments. However, in reality, improving one aspect of performance inevitably leads to a decline in other aspects. To achieve the superior performance of the cloud-patterned UHPC decorative panel material described in this invention, it is difficult to achieve by adjusting a single component. It is essential to grasp the overall formulation of the cloud-patterned UHPC decorative panel material, comprehensively compounding each component and adjusting its dosage. Improper compounding or dosage of any single component will prevent the cloud-patterned UHPC decorative panel material from achieving the comprehensive performance of this invention. The novel overall formulation and proportioning of this invention are precisely the inventive point of this invention.

[0110] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A method for preparing a cloud-patterned UHPC decorative panel, characterized in that, Includes the following steps: S1 Preparation of UHPC Base Material: Weigh each raw material component of UHPC base material according to the formula and mix them evenly; The UHPC base material comprises the following components by weight: 60-80 parts of white silicate cement with a PW of 42.5 or higher and a whiteness of ≥89. 5-10 parts white silica fume 10-20 parts of ultrafine active powder 3-10 parts titanium dioxide 80-150 parts of quartz sand with a whiteness ≥93 Plasticizer 1.5-2.5 parts Defoamer 0.005-0.01 parts 17-23 parts water 1-3 parts reinforcing fiber Pigment 0.1-0.3 parts; S2 Preparation of light-colored UHPC pigment: Weigh each raw material component of the light-colored UHPC pigment according to the formula and mix them evenly; The light-colored UHPC pigment comprises the following components by weight: 60-80 parts of white silicate cement with a PW of 42.5 or higher and a whiteness of ≥89. 5-10 parts white silica fume 10-20 parts of ultrafine active powder 3-10 parts titanium dioxide 80-150 parts of quartz sand with a whiteness ≥93 Plasticizer 1.5-2.5 parts Defoamer 0.005-0.01 parts 17-23 parts water; S3 Production of Dark UHPC Pigment: Weigh each raw material component of dark UHPC pigment according to the formula and mix them evenly; The dark UHPC pigment comprises the following components by weight: 60-80 parts of white silicate cement with a PW of 42.5 or higher and a whiteness of ≥89. 5-10 parts white silica fume 10-20 parts of ultrafine active powder 3-10 parts titanium dioxide 80-150 parts of quartz sand with a whiteness ≥93 Plasticizer 1.5-2.5 parts Defoamer 0.005-0.01 parts 17-23 parts water 1-3 parts pigment; S4 Mixing and Coloring: First, place the UHPC base material in a round basin-shaped container, then sprinkle the light-colored UHPC colorant and the dark-colored UHPC colorant on the surface of the UHPC base material respectively. The UHPC base material, light-colored UHPC colorant and dark-colored UHPC colorant are mixed in a mass ratio of (96-98):(2-4):(2-4). Use a stirring tool to stir the UHPC base material back and forth from the surface to the bottom for 3-7 revolutions. S5 Casting: The mixture prepared in step S4 is cast into the mold, so that the mixture is evenly distributed in the mold after flowing; the bottom mold of the mold is required to be made of PVC rigid plastic board and the flatness of the PVC rigid plastic board is required to be no more than 1 mm per meter, and the gloss is not less than 80. S6 Vacuuming and Vibration Treatment: After the mold is cast in step S5, it is moved into a molding chamber that can be vacuumed and vibrated at high frequency. First, vacuum is applied and then high frequency vibration is performed. The mold is required to be in a vacuum of 0.05-0.12MPa and vibrate at a frequency of 100 times / s on a high frequency vibration table for 20-60s. S7 Curing and Molding: After initial setting, the film is covered for curing. After curing for 12-36 hours, it is moved into the steam curing chamber and steam cured for 36-52 hours before demolding. After demolding, it continues to be naturally cured for 5-10 days to obtain cloud-patterned UHPC decorative panels.

2. The method for preparing the cloud-patterned UHPC decorative panel according to claim 1, characterized in that, The step S1 of preparing the UHPC base material includes the following steps: A1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 20-30 rad / min for 5-10 minutes. A2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step A1. Stir at a speed of 40-60 rad / min for 4-6 minutes. A3. Weigh the pigments according to the proportions and add them to the mixture in step A2. Stir evenly at a stirring speed of 40-60 rad / min for 2-4 minutes. A4. Weigh the reinforcing fibers according to the ratio, add them to the mixture in step A3, and stir evenly at a stirring speed of 40-60 rad / min for 2-4 min.

3. The method for preparing the cloud-patterned UHPC decorative panel according to claim 1 or 2, characterized in that, The step S2, which involves producing a light-colored UHPC pigment, includes the following steps: B1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 20-30 rad / min for 5-10 minutes. B2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step B1. Stir at a speed of 40-60 rad / min for 4-6 minutes.

4. The method for preparing the cloud-patterned UHPC decorative panel according to claim 1, characterized in that, Step S3, which involves producing dark-colored UHPC pigment, includes the following steps: C1. Weigh out white silicate cement, white silica fume, ultrafine active powder, titanium dioxide, and quartz sand according to the proportions, and mix them together at a stirring speed of 20-30 rad / min for 5-10 min. C2. Weigh the plasticizer and water, add the corresponding proportion of defoamer, and then mix them with the mixture in step C1. Stir at a speed of 40-60 rad / min for 4-6 minutes. C3. Weigh the pigments according to the proportions and add them to the mixture in step C2. Stir evenly at a stirring speed of 40-60 rad / min for 2-4 minutes.

5. The method for preparing the cloud-patterned UHPC decorative panel according to claim 1, characterized in that, In step S7, after initial curing, the film is covered and cured for 24 hours. After curing in a steam curing chamber for 48 hours, the mold is removed and then naturally cured for 7 days to obtain a cloud-patterned UHPC decorative panel.

6. The method for preparing the cloud-patterned UHPC decorative panel according to claim 1, characterized in that, In step S7, the steam curing process is as follows: heating for 2 hours - maintaining a constant temperature for 44 hours - cooling down for 2 hours; and the constant temperature is 50-60℃.

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