UHPC heat preservation and decoration integrated plate and preparation method thereof

Abstract

The invention discloses a UHPC heat preservation and decoration integrated board and a preparation method thereof.The UHPC heat preservation and decoration integrated board is of a sandwich structure composed of a UHPC decoration board, a thermosetting composite polystyrene particle heat preservation layer (A-level flame retardant) and a UHPC structural board, the heat conductivity coefficient is 0.035 W / m.K to 0.050 W / m.K, and the UHPC heat preservation and decoration integrated board has excellent heat insulation performance and can reach the A-level fireproof grade. The invention solves the problem that the fireproof performance of the existing partial building insulation and decoration integrated plate still needs to be improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a UHPC thermal insulation and decorative integrated board and a preparation method thereof. Background Art

[0002] Building thermal insulation and decorative integrated panels are a new type of building material that combines thermal insulation and decorative effects. With the intensification of global climate change, countries have increasingly stringent standards for building energy conservation, especially in residential and commercial buildings, where the use of thermal insulation materials has become an important technical requirement. The emergence of building thermal insulation and decorative integrated panels aims to simplify the construction process, improve building energy efficiency, and reduce building energy consumption. However, despite the broad application prospects of building thermal insulation and decorative integrated panels, there are still some shortcomings, such as high construction requirements, and some building thermal insulation and decorative integrated panels still need to be improved in terms of fire resistance and environmental adaptability. Summary of the invention

[0003] In order to overcome the defects of the prior art, a UHPC thermal insulation and decoration integrated panel and a preparation method thereof are provided to solve the problem that the fire resistance of some existing building thermal insulation and decoration integrated panels still needs to be improved.

[0004] To achieve the above purpose, a UHPC thermal insulation and decorative integrated panel is provided, comprising the following steps:

[0005] The expanded polystyrene particles are prepared by an impregnation process, and a brominated flame retardant is added during the polymerization of styrene monomers to couple and modify the molecular structure to obtain flame-retardant expandable polystyrene particles.

[0006] Providing a three-dimensional woven fiber grid, and pouring flame-retardant expandable polystyrene particles into the three-dimensional woven fiber grid to form a thermal insulation layer;

[0007] A UHPC decorative board is prepared by using UHPC decorative powder, wherein the UHPC decorative board has an alkali-resistant glass fiber cloth layer built therein;

[0008] The UHPC structural board is made of cement, silica fume, micro beads, slag powder, machine-made sand, water reducing agent, steel fiber and water, wherein the UHPC structural board has built-in reinforcing fiber, and the reinforcing fiber is any one of inorganic durable glass fiber mesh cloth, basalt fiber mesh cloth, modified polyvinyl alcohol fiber and chopped basalt fiber;

[0009] When the UHPC decorative panel and the UHPC structural panel are formed but not solidified, the UHPC decorative panel and the UHPC structural panel are respectively pressed onto opposite sides of the thermal insulation layer, so that the UHPC decorative panel and the UHPC structural panel are bonded to the thermal insulation layer to form a UHPC thermal insulation decorative integrated panel.

[0010] Furthermore, the particle size of the flame retardant expandable polystyrene particles is 2 to 6 mm, and the volume density is 60 to 80 kg / m 3 .

[0011] Furthermore, the brominated flame retardant is tetrabromophthalic anhydride.

[0012] Furthermore, the added amount of the brominated flame retardant is 3-8%.

[0013] Furthermore, the UHPC structural board includes 750-800 parts by mass of cement, 50-60 parts by mass of silica fume, 50-60 parts by mass of microspheres, 200-230 parts by mass of slag powder, 900-110 parts by mass of machine-made sand, 10-20 parts by mass of water reducer, 180-210 parts by mass of steel fiber and 190-210 parts by mass of water.

[0014] Furthermore, the three-dimensional woven fiber grid includes multiple layers of fiber meshes arranged at intervals and connecting ribs connecting two adjacent layers of fiber meshes.

[0015] The invention provides a UHPC thermal insulation and decoration integrated board, which is prepared by adopting a preparation method of a UHPC thermal insulation and decoration integrated board.

[0016] The beneficial effect of the present invention is that the UHPC thermal insulation and decorative integrated board of the present invention is a sandwich structure of UHPC decorative board + polystyrene foam / three-dimensional woven fiber grid thermal insulation board + UHPC structural board, and the thermal conductivity is less than 0.05W / m·K, has excellent thermal insulation performance, and can reach Class A fire protection grade. The UHPC thermal insulation and decorative integrated board of the present invention has Class A flame retardant and lightweight and efficient thermal insulation properties. The UHPC thermal insulation and decorative integrated board of the present invention has higher energy-saving efficiency, lower volume density, and is convenient for construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0018] Figure 1 It is a schematic structural diagram of a UHPC thermal insulation and decorative integrated panel according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of a three-dimensional woven fiber mesh according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] Reference Figure 1 and Figure 2 As shown, the present invention provides a UHPC thermal insulation and decorative integrated panel, comprising: a UHPC decorative panel 1, a thermal insulation layer 2 and a UHPC structural panel 3.

[0023] The UHPC decorative panel 1, the thermal insulation layer 2 and the UHPC structural panel 3 are bonded together in sequence.

[0024] Specifically, the UHPC decorative board 1 and the UHPC structural board 3 are respectively arranged on opposite sides of the thermal insulation layer 2. The UHPC structural board 3 is bonded to one side of the thermal insulation layer 2. The UHPC decorative board 1 is bonded to the other side of the thermal insulation layer 2.

[0025] UHPC structural panels include cement, silica fume, microspheres, slag powder, machine-made sand, water reducer, steel fiber and water. The above components are prepared into UHPC structural panels through processes such as mixing, molding, curing, demoulding and surface treatment.

[0026] As a preferred embodiment, the UHPC structural panel includes 750-800 parts by mass of cement, 50-60 parts by mass of silica fume, 50-60 parts by mass of microspheres, 200-230 parts by mass of slag powder, 900-110 parts by mass of machine-made sand, 10-20 parts by mass of water reducer, 180-210 parts by mass of steel fiber and 190-210 parts by mass of water.

[0027] UHPC structural panels have built-in reinforcing fibers, which are any of inorganic durable glass fiber mesh, basalt fiber mesh, modified polyvinyl alcohol fiber, and chopped basalt fiber.

[0028] Specifically, the UHPC structural panels are reinforced with inorganic durable glass fiber mesh cloth, basalt fiber mesh cloth, or modified polyvinyl alcohol fiber, chopped basalt fiber and other dispersed fiber reinforcements. A continuous production line is used to produce UHPC structural panels with a thickness of 3 to 5 mm, and anchor hangers are pre-embedded on the UHPC structural panels according to the designed positions.

[0029] UHPC decorative board 1 adopts decorative UHPC premix, adjusts the silicone base mold and slurry color according to the design texture and color, is reinforced with alkali-resistant glass fiber cloth, and uses a continuous production line to produce decorative boards with a thickness of 3 to 5 mm.

[0030] The heat-insulating layer 2 includes a three-dimensional woven fiber grid 21 and flame-retardant expandable polystyrene particles.

[0031] See also Figure 2 As shown, the three-dimensional woven fiber grid 21 includes multiple layers of fiber mesh 211 and connecting ribs 212. The multiple layers of fiber mesh 211 are arranged at intervals. The connecting ribs 212 are connected between two adjacent layers of fiber mesh 211.

[0032] Flame-retardant expandable polystyrene particles are poured into the three-dimensional woven fiber grid to form a thermal insulation layer 2 .

[0033] The present invention provides a method for preparing a UHPC thermal insulation and decorative integrated board, comprising the following steps:

[0034] S1. The expanded polystyrene particles are prepared by an impregnation process. A brominated flame retardant is added during the polymerization of styrene monomers to couple and modify the molecular structure to obtain flame-retardant expandable polystyrene particles.

[0035] The expanded polystyrene particles are prepared by impregnation process. The particle size of the flame retardant expandable polystyrene particles is 2-6 mm and the volume density is 60-80 kg / m 3 , the fire protection grade is A.

[0036] The bromine flame retardant is added in the polymerization process of styrene monomer to couple and modify its molecular structure to obtain flame-retardant expandable polystyrene particles.

[0037] The brominated flame retardant is tetrabromophthalic anhydride. The amount of the brominated flame retardant added is 3 to 8%.

[0038] S2. Provide a three-dimensional woven fiber grid, and pour flame-retardant expandable polystyrene particles into the three-dimensional woven fiber grid to form a thermal insulation layer.

[0039] The three-dimensional woven fiber mesh is a three-dimensional woven basalt fiber mesh, a three-dimensional woven glass fiber mesh, and a three-dimensional woven basalt / glass fiber blended mesh, with a thickness of 20 to 100 mm and a flame retardant grade of A.

[0040] The thermal conductivity of the insulation layer is 0.030W / m·K~0.040W / m·K; the fire protection grade is A; the volume density is 90-120kg / m 3 ; Compressive strength 0.15-0.20MPa; thickness 20mm-100mm.

[0041] S3. UHPC decorative panels are made of UHPC decorative powder, and the UHPC decorative panels are built with alkali-resistant glass fiber cloth layers.

[0042] Decorative UHPC premix is ​​used, the silicone base mold and slurry color are adjusted according to the designed texture and color, and it is reinforced with alkali-resistant glass fiber cloth. A continuous production line is used to produce decorative panels with a thickness of 3 to 5 mm.

[0043] S4. UHPC structural panels are made of cement, silica fume, micro beads, slag powder, machine-made sand, water reducing agent, steel fiber and water. UHPC structural panels have built-in reinforcing fibers. The reinforcing fibers are any one of inorganic durable glass fiber mesh cloth, basalt fiber mesh cloth, three-dimensional fiber mesh cloth, dispersed fiber, modified polyvinyl alcohol fiber and short-cut basalt fiber.

[0044] The UHPC structural panels with a thickness of 3 to 5 mm are produced by using inorganic durable glass fiber mesh cloth, basalt fiber mesh cloth reinforcement, or modified polyvinyl alcohol fiber, chopped basalt fiber and other dispersed fiber reinforcement. The anchor hangers are embedded in the UHPC structural panels according to the designed positions.

[0045] S5. When the UHPC decorative panels and the UHPC structural panels are formed but not solidified, the UHPC decorative panels and the UHPC structural panels are pressed onto opposite sides of the thermal insulation layer, respectively, so that the UHPC decorative panels and the UHPC structural panels are bonded to the thermal insulation layer to form a UHPC thermal insulation decorative integrated panel.

[0046] When the UHPC decorative panels and UHPC structural panels are just formed and not yet solidified, they are tightly fitted to the upper and lower layers of the three-dimensional woven fiber grid respectively. After the inorganic UHPC slurry is solidified, the UHPC panels and the polystyrene foam / three-dimensional woven fiber grid insulation panels are firmly bonded together.

[0047] The compressive strength of the UHPC structural board in the UHPC thermal insulation and decorative integrated board of the present invention is greater than 140 MPa, and the thickness is 3 to 5 mm.

[0048] The UHPC thermal insulation and decoration integrated board of the present invention has a thermal conductivity of 0.035 W / m·K to 0.050 W / m·K, has excellent thermal insulation performance, and can achieve Class A fire protection grade.

[0049] The UHPC thermal insulation and decoration integrated board of the present invention is a sandwich structure of UHPC decorative board + polystyrene foam / three-dimensional woven fiber grid thermal insulation board + UHPC structural board, with a thermal conductivity of less than 0.05W / m·K, excellent thermal insulation performance, and can achieve Class A fire protection grade. The UHPC thermal insulation and decoration integrated board of the present invention has Class A flame retardant and lightweight and efficient thermal insulation properties. The UHPC thermal insulation and decoration integrated board of the present invention has higher energy-saving efficiency, lower volume density, and is convenient for construction.

[0050] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A method for preparing a UHPC thermal insulation and decorative integrated board, characterized in that: include: The expanded polystyrene particles are prepared by an impregnation process, and a brominated flame retardant is added during the polymerization of styrene monomers to couple and modify the molecular structure to obtain flame-retardant expandable polystyrene particles. Providing a three-dimensional woven fiber grid, and pouring flame-retardant expandable polystyrene particles into the three-dimensional woven fiber grid to form a thermal insulation layer; A UHPC decorative board is prepared by using UHPC decorative powder, wherein the UHPC decorative board has an alkali-resistant glass fiber cloth layer built therein; The UHPC structural board is made of cement, silica fume, micro beads, slag powder, machine-made sand, water reducing agent, steel fiber and water, wherein the UHPC structural board has built-in reinforcing fiber, and the reinforcing fiber is any one of inorganic durable glass fiber mesh cloth, basalt fiber mesh cloth, modified polyvinyl alcohol fiber and chopped basalt fiber; When the UHPC decorative panel and the UHPC structural panel are formed but not solidified, the UHPC decorative panel and the UHPC structural panel are respectively pressed onto opposite sides of the thermal insulation layer, so that the UHPC decorative panel and the UHPC structural panel are bonded to the thermal insulation layer to form a UHPC thermal insulation decorative integrated panel.

2. The method for preparing the UHPC thermal insulation and decorative integrated board according to claim 1, characterized in that: The particle size of the flame retardant expandable polystyrene particles is 2 to 6 mm, and the volume density is 60 to 80 kg / m 3 .

3. The method for preparing the UHPC thermal insulation and decorative integrated board according to claim 1, characterized in that: The brominated flame retardant is tetrabromophthalic anhydride.

4. The method for preparing the UHPC thermal insulation and decorative integrated board according to claim 3, characterized in that: The added amount of the brominated flame retardant is 3-8%.

5. The method for preparing the UHPC thermal insulation and decorative integrated board according to claim 1, characterized in that: The UHPC structural board includes 750-800 parts by mass of cement, 50-60 parts by mass of silica fume, 50-60 parts by mass of microspheres, 200-230 parts by mass of slag powder, 900-110 parts by mass of machine-made sand, 10-20 parts by mass of water reducing agent, 180-210 parts by mass of steel fiber and 190-210 parts by mass of water.

6. The method for preparing the UHPC thermal insulation and decorative integrated board according to claim 1, characterized in that: The three-dimensional woven fiber grid comprises multiple layers of fiber meshes arranged at intervals and connecting ribs connected between two adjacent layers of fiber meshes.

7. A UHPC thermal insulation and decorative integrated board, characterized in that: The UHPC thermal insulation and decorative integrated panel is prepared by the preparation method of any one of claims 1 to 6.

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