UHPC-inorganic fiber felt composite thermal insulation decorative plate and manufacturing method thereof

Abstract

The invention provides a UHPC-inorganic fiber felt composite thermal insulation decorative plate, which comprises a UHPC panel, an upper adhesive mortar layer, an inorganic fiber felt, a lower adhesive mortar layer, a UHPC back plate and a copper wire, the UHPC panel is adhered to the upper surface of the inorganic fiber felt through the upper adhesive mortar layer, the UHPC back plate is adhered to the lower surface of the inorganic fiber felt through the lower adhesive mortar layer, and the copper wire is adhered to the lower surface of the inorganic fiber felt through the lower adhesive mortar layer. Back bolt connecting pieces are embedded in the UHPC panel and the UHPC back plate, the copper wire penetrates through the upper adhesive mortar layer, the inorganic fiber felt and the lower adhesive mortar layer, and the two ends of the copper wire are fixedly connected to the back bolt connecting piece of the UHPC panel layer and the back bolt connecting piece of the UHPC back plate respectively. The invention further provides a manufacturing method of the UHPC-inorganic fiber felt composite thermal insulation decorative plate. The UHPC-inorganic fiber felt composite thermal insulation decorative plate provided by the invention has relatively good flame retardant property and thermal insulation property, and is relatively low in cost.

Description

Technical Field

[0001] The invention relates to a thermal insulation decorative board, in particular to a UHPC-inorganic fiber felt composite thermal insulation decorative board and a manufacturing method thereof. Background Art

[0002] Ultra-high performance concrete (UHPC) building insulation and decoration integrated panels are an innovative building material that combines excellent insulation performance with beautiful decorative effects. At present, building insulation and decoration integrated panels have been widely used in exterior walls, roofs and other parts, and are commonly found in high-rise buildings, public facilities and affordable housing projects. It not only improves the appearance of the building, but also effectively reduces the heat exchange outside the building, which helps to improve the comfort of living or use. Although the prospects for UHPC building insulation and decoration integrated panels are broad, there are still some shortcomings. First, the production cost of UHPC is relatively high, which may affect its market promotion. Secondly, the requirements for construction technology are high, and construction workers need to have professional skills to ensure the quality of construction. In addition, some UHPC integrated panels still need further improvement in fire resistance and environmental adaptability. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a UHPC-inorganic fiber felt composite thermal insulation decorative board, which has good flame retardant and thermal insulation properties and low cost.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] A UHPC-inorganic fiber felt composite thermal insulation decorative board, comprising a UHPC panel, an upper bonding mortar layer, an inorganic fiber felt, a lower bonding mortar layer, a UHPC backboard, and a copper wire, wherein the UHPC panel is bonded to the upper surface of the inorganic fiber felt through the upper bonding mortar layer, and the UHPC backboard is bonded to the lower surface of the inorganic fiber felt through the lower bonding mortar layer, and the UHPC panel and the UHPC backboard are both pre-buried with back bolt connectors, and the copper wire passes through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer, and the two ends of the copper wire are respectively fixedly connected to the back bolt connector of the UHPC panel layer and the UHPC backboard. The back bolt connector of the board; the UHPC panel and the UHPC backboard are both made of UHPC composite materials, and the UHPC composite materials are composed of the following raw materials in parts by weight: 700-750 parts of cement, 100-110 parts of silica fume, 90-100 parts of microspheres, 120-150 parts of slag powder, 180-200 parts of water, 1000-1200 parts of machine-made sand, 15-18 parts of water reducer, 50-70 parts of steel fiber, and 20-40 parts of basalt fiber; the inorganic fiber felt is made of coal gangue or slag; the upper bonding mortar layer and the lower bonding mortar layer are made of polymer bonding mortar.

[0006] Furthermore, the cement described in the present invention is PII type 52.5 silicate cement, which complies with the provisions of GB 175-2023.

[0007] Furthermore, the SiO2 content of the silica ash described in the present invention is ≥90%, which complies with the requirements of GB / T 27690-2023.

[0008] Furthermore, the microspheres of the present invention are vitrified microspheres with a particle size of 0.1-2 mm; the slag powder is alkaline slag powder with a particle size of 10-35 μm.

[0009] Furthermore, the stone powder content of the machine-made sand of the present invention is ≤5%, and the MB value is ≤1.4.

[0010] Furthermore, the water reducer of the present invention is a polycarboxylic acid water reducer with a water reduction rate of ≥25%, which complies with the provisions of GB 8076-2008 and GB 50119-2013.

[0011] Furthermore, the steel fiber of the present invention has a length of 5-28 mm and a diameter of 0.10-0.30 mm; the basalt fiber has a length of 5-20 mm and a diameter of 8-22 μm.

[0012] Furthermore, the coal gangue described in the present invention is one or more of clay rock coal gangue, sandstone coal gangue, carbonate rock coal gangue or alumina rock coal gangue, with no limit on particle size; the slag is one or more of alkaline slag, water slag, heavy slag or expanded slag beads, with no limit on particle size.

[0013] Another technical problem to be solved by the present invention is to provide a method for manufacturing the above-mentioned UHPC-inorganic fiber felt composite thermal insulation decorative board.

[0014] To solve the above technical problems, the technical solution is:

[0015] A method for manufacturing a UHPC-inorganic fiber felt composite thermal insulation decorative board comprises the following steps:

[0016] S1. Weigh the raw materials of the UHPC composite material by weight, dry-mix the raw materials except water, add water after mixing evenly, and stir until mixed evenly to obtain slurry; pour the slurry into a mold, use a vibrator to vibrate to eliminate bubbles to obtain concrete; smooth the surface of the concrete and cover it with a wet cloth or plastic film, and then demold after curing at room temperature for more than 7 days to obtain UHPC panels and UHPC backboards, and pre-embed back bolt connectors in the UHPC panels and UHPC backboards respectively;

[0017] S2. The gangue or slag is heated and melted, and then spun through a spinneret, cooled by air, drawn, and solidified into fibers to obtain continuous inorganic fiber filaments, and the inorganic fiber filaments are swung and laid to form a fluffy inorganic fiber aggregate, and the inorganic fiber aggregate is reinforced by needle punching to obtain an inorganic fiber felt;

[0018] S3. Apply bonding mortar between the UHPC panel and the upper surface of the inorganic fiber felt, and between the UHPC backboard and the lower surface of the inorganic fiber felt to form an upper bonding mortar layer and a lower bonding mortar layer, respectively. Pass a copper wire through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer. Fix both ends of the copper wire to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard, respectively. After the upper bonding mortar layer and the lower bonding mortar layer are cured, a UHPC-inorganic fiber felt composite thermal insulation decorative board is obtained.

[0019] Furthermore, in step S1 of the present invention, the stirring speed is 300-500r / min; in step S2, the heating and melting temperature is 1200-1400°C, the speed of air cooling is 500-600r / min, the drawing speed is 400-600m / min, the frequency of the swinging wire is 600-1000 times / min, the laying speed is 10-20m / min, and the density of the needle punching reinforcement is 30-50 needles / cm 2 .

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The present invention combines low-cost UHPC material with inorganic fiber felt to produce a decorative thermal insulation integrated board material that has both Class A flame retardancy and high-efficiency thermal insulation performance. Compared with the existing decorative thermal insulation integrated board, the present invention has a low thermal conductivity of less than 0.04 W / m·K while achieving Class A flame retardancy, which is not available in existing similar products. The present invention has higher energy-saving efficiency, lower volume density, and is convenient for construction.

[0022] (2) Compared with commercially available UHPC, the present invention uses machine-made sand to replace quartz sand, thereby reducing the cost of fine aggregate, and uses basalt fiber to replace part of the steel fiber, thereby reducing the fiber cost. The prepared UHPC panel and UHPC backboard have a 28-day compressive strength greater than 130 MPa, a flexural strength greater than 15 MPa, and a thickness of 5-15 mm (concrete strength test standard: GB / T 50107-2010, GB / T 50081-2019; thickness test standard: GB / T 50204-2015, sample size 100×100×400 mm).

[0023] (3) The inorganic fiber felt prepared by the present invention has an inorganic fiber diameter of 1-3 μm and a volume density of 80-110 kg / m3 , thermal conductivity is 0.025-0.035W / m·K, thickness is 10-50mm; fire protection grade is A (thermal conductivity test standard: GB / T10801.2-2018, GB / T 10294-2008, sample size 300×300mm; combustion performance test standard: GB 8624-2012, GB / T 5464-2010, GB / T 14402-2007, sample size diameter 40-50mm; volume density test standard: GB / T2997-2015; thickness test standard: GB 6672-2001, GB / T 13761.1-2022).

[0024] (4) The thermal conductivity of the UHPC-inorganic fiber felt composite thermal insulation decorative board prepared by the present invention is 0.028-0.040 W / m·K, and the volume density is 120-230 kg / m 3 , has excellent thermal insulation performance, and can achieve Class A fire protection grade (thermal conductivity test standard: GB / T 10801.2-2018, GB / T 10294-2008, sample size 300×300mm; combustion performance test standard: GB 8624-2012, GB / T5464-2010, GB / T14402-2007, sample size diameter 40-50mm; volume density test standard: GB / T 2997-2015). BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the structure of the UHPC-inorganic fiber felt composite thermal insulation decorative panel described in Example 1 of the present invention. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below in conjunction with specific embodiments. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention but are not intended to limit the present invention.

[0028] Example 1

[0029] The UHPC-inorganic fiber felt composite thermal insulation decorative board comprises a UHPC panel 1, an upper bonding mortar layer 2, an inorganic fiber felt 3, a lower bonding mortar layer 4, a UHPC backboard 5, and a copper wire 6. The UHPC panel 1 is bonded to the upper surface of the inorganic fiber felt 3 through the upper bonding mortar layer 2, and the UHPC backboard 5 is bonded to the lower surface of the inorganic fiber felt 3 through the lower bonding mortar layer 4. Back bolt connectors 7 are pre-embedded in the UHPC panel 1 and the UHPC backboard 5. The copper wire 6 passes through the upper bonding mortar layer 2, the inorganic fiber felt 3, and the lower bonding mortar layer 4, and two ends of the copper wire 6 are respectively fixedly connected to the back bolt connector 7 of the UHPC panel layer 1 and the back bolt connector 7 of the UHPC backboard 5.

[0030] UHPC panels and UHPC backboards are both made of UHPC composite materials, which are composed of the following raw materials in parts by weight: 720 parts of cement, 105 parts of silica fume, 95 parts of microspheres, 130 parts of slag powder, 190 parts of water, 1100 parts of machine-made sand, 16 parts of water reducer, 60 parts of steel fiber, and 30 parts of basalt fiber; the inorganic fiber felt is made of coal gangue; the upper bonding mortar layer and the lower bonding mortar layer are both made of polymer bonding mortar. Among them, the cement is PII type 52.5 silicate cement, which conforms to the provisions of GB 175-2023; the SiO2 content of silica fume is ≥90%, which conforms to the provisions of GB / T 27690-2023; the microspheres are vitrified microspheres with a particle size of 1mm; the slag powder is alkaline slag powder with a particle size of 20μm; the stone powder content of the machine-made sand is ≤5%, and the MB value is ≤1.4; the water reducer is a polycarboxylate water reducer with a water reduction rate of ≥25%, which conforms to the provisions of GB 8076-2008 and GB 50119-2013; the length of the steel fiber is 15mm and the diameter is 0.20mm; the length of the basalt fiber is 12mm and the diameter is 15μm; the coal gangue is clay rock coal gangue with no limit on particle size.

[0031] The manufacturing method of embodiment 1 comprises the following steps:

[0032] S1. Weigh the raw materials of the UHPC composite material by weight, dry-mix the raw materials except water, add water after mixing evenly, and stir at a speed of 400r / min until the mixture is evenly mixed to obtain slurry; pour the slurry into a mold, use a vibrator to vibrate to eliminate bubbles to obtain concrete; smooth the surface of the concrete and cover it with a wet cloth or plastic film, and then demold after curing at room temperature for more than 7 days to obtain UHPC panels and UHPC backboards, and embed back bolt connectors in the UHPC panels and UHPC backboards;

[0033] S2. The clay rock gangue is heated and melted, and then spun through a spinneret, cooled by air, stretched, and solidified into fibers to obtain continuous inorganic fiber filaments. The inorganic fiber filaments are subjected to swinging and web laying to form fluffy inorganic fiber aggregates. The inorganic fiber aggregates are reinforced by needle punching to obtain inorganic fiber felt. The heating and melting temperature is 1300°C, the speed of blowing and cooling is 550r / min, the stretching speed is 500m / min, the swinging frequency is 800 times / min, the web laying speed is 15m / min, and the density of needle punching reinforcement is 40 needles / cm 2 ;

[0034] S3. Apply polymer bonding mortar between the UHPC panel and the upper surface of the inorganic fiber felt, and between the UHPC backboard and the lower surface of the inorganic fiber felt to form an upper bonding mortar layer and a lower bonding mortar layer, respectively; pass a copper wire through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer; fix the two ends of the copper wire to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard, respectively; after the upper bonding mortar layer and the lower bonding mortar layer are cured, a UHPC-inorganic fiber felt composite thermal insulation decorative board is obtained.

[0035] After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite insulation decorative board prepared in Example 1 is 0.034 W / m·K, and the volume density is 167 kg / m 3 , can achieve Class A fire protection grade (thermal conductivity test standard: GB / T 10801.2-2018, GB / T 10294-2008, sample size 300×300mm; combustion performance test standard: GB 8624-2012, GB / T5464-2010, GB / T14402-2007, sample size diameter 50mm; volume density test standard: GB / T 2997-2015).

[0036] Example 2

[0037] The structure of the UHPC-inorganic fiber felt composite thermal insulation decorative board is the same as that of Example 1.

[0038] UHPC panels and UHPC backboards are both made of UHPC composite materials, which are composed of the following raw materials in parts by weight: 700 parts of cement, 110 parts of silica fume, 92 parts of microspheres, 140 parts of slag powder, 195 parts of water, 1200 parts of machine-made sand, 15 parts of water reducer, 65 parts of steel fiber, and 20 parts of basalt fiber; the inorganic fiber felt is made of coal gangue; the upper bonding mortar layer and the lower bonding mortar layer are both made of polymer bonding mortar. Among them, the cement is PII type 52.5 silicate cement, which meets the requirements of GB 175-2023; the SiO2 content of silica fume is ≥90%, which meets the requirements of GB / T 27690-2023; the microspheres are vitrified microspheres with a particle size of 0.1mm; the slag powder is alkaline slag powder with a particle size of 10μm; the stone powder content of the machine-made sand is ≤5%, and the MB value is ≤1.4; the water reducer is a polycarboxylate water reducer with a water reduction rate of ≥25%, which meets the requirements of GB 8076-2008 and GB 50119-2013; the length of the steel fiber is 5mm and the diameter is 0.10mm; the length of the basalt fiber is 5mm and the diameter is 8μm; the coal gangue is sandstone coal gangue with no limit on particle size.

[0039] The manufacturing method of embodiment 2 comprises the following steps:

[0040] S1. Weigh the raw materials of the UHPC composite material by weight, dry-mix the raw materials except water, add water after mixing evenly, and stir at a speed of 300r / min until the mixture is evenly mixed to obtain slurry; pour the slurry into a mold, use a vibrator to vibrate to eliminate bubbles to obtain concrete; smooth the surface of the concrete and cover it with a wet cloth or plastic film, and then demold after curing at room temperature for more than 7 days to obtain UHPC panels and UHPC backboards, and embed back bolt connectors in the UHPC panels and UHPC backboards;

[0041] S2. Heat and melt the sandstone gangue, and sequentially spin through a spinneret, blow and cool, draw, and solidify into fibers to obtain continuous inorganic fiber filaments, and form fluffy inorganic fiber aggregates through swinging and laying of the inorganic fiber filaments, and reinforce the inorganic fiber aggregates through needle punching to obtain inorganic fiber felt, the heating and melting temperature is 1200°C, the speed of blowing and cooling is 500r / min, the speed of drawing is 400m / min, the frequency of swinging is 600 times / min, the speed of laying is 10m / min, and the density of needle punching reinforcement is 30 needles / cm 2 ;

[0042] S3. Apply polymer bonding mortar between the UHPC panel and the upper surface of the inorganic fiber felt, and between the UHPC backboard and the lower surface of the inorganic fiber felt to form an upper bonding mortar layer and a lower bonding mortar layer, respectively; pass a copper wire through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer; fix the two ends of the copper wire to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard, respectively; after the upper bonding mortar layer and the lower bonding mortar layer are cured, a UHPC-inorganic fiber felt composite thermal insulation decorative board is obtained.

[0043] After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite insulation decorative board prepared in Example 2 is 0.028 W / m·K, and the volume density is 120 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0044] Example 3

[0045] The structure of the UHPC-inorganic fiber felt composite thermal insulation decorative board is the same as that of Example 1.

[0046] UHPC panels and UHPC backboards are both made of UHPC composite materials, which are composed of the following raw materials in parts by weight: 740 parts of cement, 108 parts of silica fume, 90 parts of microspheres, 150 parts of slag powder, 180 parts of water, 1050 parts of machine-made sand, 18 parts of water reducer, 70 parts of steel fiber, and 25 parts of basalt fiber; the inorganic fiber felt is made of slag; the upper bonding mortar layer and the lower bonding mortar layer are both made of polymer bonding mortar. Among them, the cement is PII type 52.5 silicate cement, which conforms to the provisions of GB 175-2023; the SiO2 content of silica fume is ≥90%, which conforms to the provisions of GB / T 27690-2023; the microspheres are vitrified microspheres with a particle size of 0.5mm; the slag powder is alkaline slag powder with a particle size of 15μm; the stone powder content of the machine-made sand is ≤5%, and the MB value is ≤1.4; the water reducer is a polycarboxylate water reducer with a water reduction rate of ≥25%, which conforms to the provisions of GB 8076-2008 and GB 50119-2013; the length of the steel fiber is 20mm and the diameter is 0.20mm; the length of the basalt fiber is 10mm and the diameter is 20μm; the slag is alkaline slag with no limit on particle size.

[0047] The manufacturing method of embodiment 3 comprises the following steps:

[0048] S1. Weigh the raw materials of the UHPC composite material by weight, dry-mix the raw materials except water, add water after mixing evenly, and stir at a speed of 400r / min until the mixture is evenly mixed to obtain slurry; pour the slurry into a mold, use a vibrator to vibrate to eliminate bubbles to obtain concrete; smooth the surface of the concrete and cover it with a wet cloth or plastic film, and then demold after curing at room temperature for more than 7 days to obtain UHPC panels and UHPC backboards, and embed back bolt connectors in the UHPC panels and UHPC backboards;

[0049] S2. The alkaline slag is heated and melted, and then spun through a spinneret, cooled by air, stretched, and solidified into fibers to obtain continuous inorganic fiber filaments. The inorganic fiber filaments are subjected to swinging and web laying to form a fluffy inorganic fiber aggregate. The inorganic fiber aggregate is reinforced by needle punching to obtain an inorganic fiber felt. The heating and melting temperature is 1350°C, the speed of blowing and cooling is 570r / min, the stretching speed is 450m / min, the swinging frequency is 900 times / min, the web laying speed is 12m / min, and the density of needle punching reinforcement is 35 needles / cm 2 ;

[0050] S3. Apply polymer bonding mortar between the UHPC panel and the upper surface of the inorganic fiber felt, and between the UHPC backboard and the lower surface of the inorganic fiber felt to form an upper bonding mortar layer and a lower bonding mortar layer, respectively; pass a copper wire through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer; fix the two ends of the copper wire to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard, respectively; after the upper bonding mortar layer and the lower bonding mortar layer are cured, a UHPC-inorganic fiber felt composite thermal insulation decorative board is obtained.

[0051] After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite thermal insulation decorative board prepared in Example 3 is 0.037 W / m·K, and the volume density is 206 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0052] Example 4

[0053] The structure of the UHPC-inorganic fiber felt composite thermal insulation decorative board is the same as that of Example 1.

[0054] UHPC panels and UHPC backboards are both made of UHPC composite materials, which are composed of the following raw materials in parts by weight: 750 parts of cement, 100 parts of silica fume, 100 parts of microspheres, 120 parts of slag powder, 200 parts of water, 1000 parts of machine-made sand, 16 parts of water reducer, 50 parts of steel fiber, and 40 parts of basalt fiber; the inorganic fiber felt is made of slag; the upper bonding mortar layer and the lower bonding mortar layer are both made of polymer bonding mortar. Among them, the cement is PII type 52.5 silicate cement, which meets the requirements of GB 175-2023; the SiO2 content of silica fume is ≥90%, which meets the requirements of GB / T 27690-2023; the microspheres are vitrified microspheres with a particle size of 2mm; the slag powder is alkaline slag powder with a particle size of 35μm; the stone powder content of the machine-made sand is ≤5%, and the MB value is ≤1.4; the water reducer is a polycarboxylate water reducer with a water reduction rate of ≥25%, which meets the requirements of GB 8076-2008 and GB 50119-2013; the length of the steel fiber is 28mm and the diameter is 0.30mm; the length of the basalt fiber is 20mm and the diameter is 22μm; the slag is water slag with no limit on particle size.

[0055] The manufacturing method of embodiment 4 comprises the following steps:

[0056] S1. Weigh the raw materials of the UHPC composite material by weight, dry-mix the raw materials except water, add water after mixing evenly, and stir at a speed of 500r / min until the mixture is evenly mixed to obtain slurry; pour the slurry into a mold, use a vibrator to vibrate to eliminate bubbles to obtain concrete; smooth the surface of the concrete and cover it with a wet cloth or plastic film, and demold after curing at room temperature for more than 7 days to obtain UHPC panels and UHPC backboards, and embed back bolt connectors in the UHPC panels and UHPC backboards;

[0057] S2. The slag is heated and melted, and then spun through a spinneret, cooled by air, stretched, and solidified into fibers to obtain continuous inorganic fiber filaments. The inorganic fiber filaments are subjected to swinging and web laying to form a fluffy inorganic fiber aggregate. The inorganic fiber aggregate is reinforced by needle punching to obtain an inorganic fiber felt. The heating and melting temperature is 1400°C, the speed of blowing and cooling is 600r / min, the speed of stretching is 600m / min, the frequency of swinging is 1000 times / min, the speed of web laying is 20m / min, and the density of needle punching reinforcement is 50 needles / cm 2 ;

[0058] S3. Apply polymer bonding mortar between the UHPC panel and the upper surface of the inorganic fiber felt, and between the UHPC backboard and the lower surface of the inorganic fiber felt to form an upper bonding mortar layer and a lower bonding mortar layer, respectively; pass a copper wire through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer; fix the two ends of the copper wire to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard, respectively; after the upper bonding mortar layer and the lower bonding mortar layer are cured, a UHPC-inorganic fiber felt composite thermal insulation decorative board is obtained.

[0059] After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite thermal insulation decorative board prepared in Example 4 is 0.040 W / m·K, and the volume density is 230 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0060] Example 5

[0061] The difference from Example 1 is that the inorganic fiber felt is made of coal gangue, which is carbonate-type coal gangue, and the particle size is not limited. After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite insulation decorative board prepared in Example 5 is 0.032 W / m·K, and the volume density is 152 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0062] Example 6

[0063] The difference from Example 3 is that the inorganic fiber felt is made of coal gangue, which is aluminous rock coal gangue, and the particle size is not limited. After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite insulation decorative board prepared in Example 6 is 0.039 W / m·K, and the volume density is 221 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0064] Example 7

[0065] The difference from Example 2 is that the inorganic fiber felt is made of slag, which is heavy slag with no limit on particle size. After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite insulation decorative board prepared in Example 7 is 0.029 W / m·K, and the volume density is 138 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0066] Example 8

[0067] The difference from Example 4 is that the inorganic fiber felt is made of slag, and the slag is expanded slag beads with no limit on particle size. After testing, the thermal conductivity of the UHPC-inorganic fiber felt composite insulation decorative board prepared in Example 8 is 0.035 W / m·K, and the volume density is 176 kg / m 3 , and can achieve Class A fire protection grade (the test standards of thermal conductivity, combustion performance, and volume density are the same as those in Example 1).

[0068] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A UHPC-inorganic fiber felt composite thermal insulation decorative board, characterized in that: It comprises a UHPC panel, an upper bonding mortar layer, an inorganic fiber felt, a lower bonding mortar layer, a UHPC backboard, and a copper wire, wherein the UHPC panel is bonded to the upper surface of the inorganic fiber felt through the upper bonding mortar layer, and the UHPC backboard is bonded to the lower surface of the inorganic fiber felt through the lower bonding mortar layer, and back bolt connectors are pre-embedded in the UHPC panel and the UHPC backboard, and the copper wire passes through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer, and the two ends of the copper wire are respectively fixedly connected to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard; The UHPC panel and the UHPC backboard are both made of UHPC composite materials, and the UHPC composite materials are composed of the following raw materials in parts by weight: 700-750 parts of cement, 100-110 parts of silica fume, 90-100 parts of microspheres, 120-150 parts of slag powder, 180-200 parts of water, 1000-1200 parts of machine-made sand, 15-18 parts of water reducer, 50-70 parts of steel fiber, and 20-40 parts of basalt fiber; the inorganic fiber felt is made of coal gangue or slag; the upper bonding mortar layer and the lower bonding mortar layer are both made of polymer bonding mortar.

2. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The cement is PII type 52.5 silicate cement.

3. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The SiO2 content of the silica fume is ≥90%.

4. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The micro beads are vitrified micro beads with a particle size of 0.1-2 mm; the slag powder is alkaline slag powder with a particle size of 10-35 μm.

5. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The stone powder content of the machine-made sand is ≤5%, and the MB value is ≤1.

4.

6. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The water reducing agent is a polycarboxylate water reducing agent with a water reducing rate of ≥25%.

7. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The length of the steel fiber is 5-28 mm, and the diameter is 0.10-0.30 mm; the length of the basalt fiber is 5-20 mm, and the diameter is 8-22 μm.

8. The UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 1, characterized in that: The coal gangue is one or more of clay rock coal gangue, sandstone coal gangue, carbonate rock coal gangue or alumina rock coal gangue; the slag is one or more of alkaline slag, water slag, heavy slag or expanded slag beads.

9. The method for manufacturing a UHPC-inorganic fiber felt composite thermal insulation decorative board according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Weigh the raw materials of the UHPC composite material by weight, dry-mix the raw materials except water, add water after mixing evenly, and stir until mixed evenly to obtain slurry; pour the slurry into a mold, use a vibrator to vibrate to eliminate bubbles to obtain concrete; smooth the surface of the concrete and cover it with a wet cloth or plastic film, and then demold after curing at room temperature for more than 7 days to obtain UHPC panels and UHPC backboards, and pre-embed back bolt connectors in the UHPC panels and UHPC backboards respectively; S2. The gangue or slag is heated and melted, and then spun through a spinneret, cooled by air, drawn, and solidified into fibers to obtain continuous inorganic fiber filaments, and the inorganic fiber filaments are swung and laid to form a fluffy inorganic fiber aggregate, and the inorganic fiber aggregate is reinforced by needle punching to obtain an inorganic fiber felt; S3. Apply bonding mortar between the UHPC panel and the upper surface of the inorganic fiber felt, and between the UHPC backboard and the lower surface of the inorganic fiber felt to form an upper bonding mortar layer and a lower bonding mortar layer, respectively. Pass a copper wire through the upper bonding mortar layer, the inorganic fiber felt, and the lower bonding mortar layer. Fix both ends of the copper wire to the back bolt connector of the UHPC panel layer and the back bolt connector of the UHPC backboard, respectively. After the upper bonding mortar layer and the lower bonding mortar layer are cured, a UHPC-inorganic fiber felt composite thermal insulation decorative board is obtained.

10. The method for manufacturing a UHPC-inorganic fiber felt composite thermal insulation decorative board according to claim 9, characterized in that: In step S1, the stirring speed is 300-500r / min; in step S2, the heating and melting temperature is 1200-1400°C, the speed of air cooling is 500-600r / min, the drawing speed is 400-600m / min, the frequency of swinging is 600-1000 times / min, the laying speed is 10-20m / min, and the density of needle reinforcement is 30-50 needles / cm 2 .

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