CN112500078A - A-grade inorganic slurry permeable fireproof heat-insulating material and preparation method and application thereof - Google Patents
A-grade inorganic slurry permeable fireproof heat-insulating material and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a permeable fireproof heat-insulating material of A-grade inorganic slurry as well as a preparation method and application thereof, belonging to the field of heat-insulating plates and comprising the following raw materials in parts by weight: 5-10 parts of Portland cement, 5-10 parts of polycarboxylic acid water reducing agent, 15-25 parts of silica fume, 25-30 parts of water, 20-35 parts of vinyl acetate-ethylene copolymer emulsion, 5-10 parts of cellulose, 0.2-0.5 part of metakaolin, 20-40 parts of hollow glass microsphere and 0.2-0.4 part of magnesium carbonate. The invention solves the problems of high heat conductivity coefficient, high water absorption, high heat value, uneven distribution of plate raw materials, overlarge volume weight and the like of the existing heat-insulating material.
Description
Technical Field
The invention mainly relates to the field of insulation boards, in particular to an A-grade inorganic slurry permeable fireproof insulation board and a preparation method and application thereof.
Background
The heat-insulating plate is a building energy-saving material, the effect of the heat-insulating plate is that the energy consumption of the building is reduced, the comfort in the use process of the building is improved, the policy of energy conservation and emission reduction advocated by the state is met, most of common heat-insulating materials are B-level heat-insulating materials, the outstanding heat-insulating performance and the low production cost of the heat-insulating materials enable the heat-insulating materials to be rapidly developed in the field of the building, but the B-level heat-insulating materials have defects, the fireproof performance of the heat-insulating materials is not enough, once a fire disaster happens to the building in a plurality of major accidents, the B-level heat-insulating materials often become the main cause of fire or. Therefore, new buildings are increasingly green to insulation with fire ratings class a.
However, although the class a thermal insulation materials such as rock wool, foamed cement, inorganic thermal mortar, etc. are excellent in fire resistance, they are difficult to achieve the desired level as energy saving materials, for example, rock wool has high water absorption rate, foamed cement and inorganic thermal mortar have low thermal insulation performance, and even if the defects are well known, it is difficult to find a more suitable thermal insulation material in the market.
Especially, the board which takes basically mature magnesium sulfate and magnesium oxide as main aggregates in the building market has serious over-standard water absorption rate, the heat value can not reach A2 level at all and even exceeds 100 percent of the specified index, the heat conductivity coefficient greatly exceeds the specified range due to the influence of the water absorption rate, and once the material is applied in a large area, the material brings great damage to the building and users thereof.
The market also has similar products with the invention, and the volume weight is mostly 140-200kg/m3As is well known, the larger volume weight increases the construction difficulty and the risk of external wall accidents. On the other hand, the cement with an excessive specific weight brings with it the consequent result of a considerable increase in the thermal conductivity. Therefore, the material which can achieve the best balance point between the heat insulation performance and the fireproof performance is a good product really needed by the market.
Disclosure of Invention
The invention aims to solve the technical problems of high heat conductivity coefficient, high water absorption, high heat value, uneven distribution of plate raw materials, overlarge volume weight and the like of the existing insulation board material.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
on the one hand, the permeable fireproof heat-insulating material of the A-grade inorganic slurry comprises the following raw materials in parts by weight: 5-10 parts of Portland cement, 5-10 parts of polycarboxylic acid water reducing agent, 15-25 parts of silica fume, 25-30 parts of water, 20-35 parts of vinyl acetate-ethylene copolymer emulsion, 5-10 parts of cellulose, 0.2-0.5 part of metakaolin, 20-40 parts of hollow glass microsphere and 0.2-0.4 part of magnesium carbonate
Preferably, the heat insulation material comprises the following raw materials in parts by weight: 6-10 parts of Portland cement, 6-8 parts of a polycarboxylic acid water reducing agent, 20-25 parts of silica fume, 26-29 parts of water, 30 parts of vinyl acetate-ethylene copolymer emulsion, 5-10 parts of cellulose, 0.3 part of metakaolin, 30 parts of hollow glass beads and 0.2 part of magnesium carbonate.
According to the invention, through the reasonable proportion of the portland cement and the magnesium carbonate, the usage amount is 0.2-0.4%, and through the excellent thermal decomposition chemical property of the magnesium carbonate, the overall heat value of the material is effectively reduced. The reasonable proportion can also reduce the production difficulty, the slurry is too thick and difficult to permeate when the proportion is too large, and the proportion is too small and cannot reduce the whole heat value. Through the reasonable proportion of the hollow glass beads and the portland cement, 20% -40% of the hollow glass beads are used, and through the low-density and high-filling-degree performance of the hollow glass beads, the whole weight of the plate is greatly reduced, so that the falling risk of an outer wall material is reduced while the construction difficulty is reduced, and the using amount of the bonding mortar is reduced. The hollow glass bead has extremely low heat conductivity coefficient, and the principle lies in blocking hot air convection, forming a plurality of discontinuous fire-resistant cavities in inorganic aggregate, and playing a role in improving heat-insulating performance. On the other hand, the material is inorganic, so that the combustible risk is avoided, and the calorific value performance of the product is not influenced. Compared with the prior art, the fireproof insulation board provided by the invention has the advantages that the types of the raw materials are convenient to obtain, the corresponding raw materials are low in price, and the production cost of an enterprise is greatly reduced on the premise of meeting the corresponding standards.
Further, the low-density polystyrene foam insulation board is also included, and the using amount is 7-15 parts by weight.
Further, the low-density polystyrene foam insulation board is fire-proof grade B1, and the volume weight is 7-15kg/m3The heat insulation board. According to the invention, the insulation board is prepared by using the low-density polystyrene foam insulation board as the substrate, but the substrate has almost no strength, and in order to reach the integral strength standard of the board without influencing the unit weight of the board, the insulation board is prepared by using the #525 portland cement as the cementing material, so that the integral strength of the board can be maximized on the premise of using the least raw materials.
Further, the low-density polystyrene foam insulation board is prepared by the following preparation method: polystyrene particles are used as raw materials, foaming is carried out firstly, then the polystyrene particles are injected into a board beating machine, the board beating is carried out under the conditions that the temperature is 100-150 ℃ and the pressure is 0.4-0.8MPa, local fusion occurs among the particles, the heat insulation board with certain uniformly distributed gaps is formed, and the size of the gaps is 3-5 mm.
According to the invention, by controlling the production process of the low-density polystyrene foam insulation board, the insulation board with moderate porosity and uniform distribution is obtained, and by controlling the permeation process, the inorganic slurry is uniformly adsorbed into the low-density polystyrene foam insulation board in vacuum, so that the uniformity of the overall fireproof performance of the board is realized.
Further, the portland cement is 525 high strength portland cement.
Further, the vinyl acetate-ethylene copolymer emulsion has a solids content of 50% to 60%.
Further, the vinyl acetate-ethylene copolymer emulsion has a minimum film forming temperature <0 ℃.
Furthermore, the fineness of the micro silicon powder is 150 meshes, and the micro silicon powder is also called as silica fume or condensed micro silicon powder, which is a large amount of SiO with strong volatility generated in an ore-smelting electric furnace when ferroalloy is used for smelting ferrosilicon and industrial silicon (metallic silicon)2And Si gas, the gas is rapidly oxidized, condensed and precipitated with air after being discharged, the material has good mechanical property and high-temperature resistance and oxidation resistance, and after the superfine silicon micro powder is added into the special refractory material, the fluidity, the sintering property, the bonding property and the pore filling property of the material are improved to different degrees. The structural density and strength are improved, the wear rate of the material is reduced, and the erosion resistance is enhanced.
Further, the fineness of the metakaolin is 150 meshes.
Further, the fineness of the magnesium carbonate is 150 meshes.
Furthermore, the fineness of the hollow glass beads is 400 meshes, and the hollow glass beads have the characteristics of light weight, large volume, low heat conductivity coefficient, high compressive strength, low oil absorption rate, good dispersibility and fluidity, high chemical stability and the like.
Further, the polycarboxylic acid water reducing agent adopts lignosulfonate and/or naphthalene sulfonate formaldehyde polymer. The polycarboxylic acid water reducing agent is a commercially available polycarboxylic acid high-performance water reducing agent, and is a concrete admixture capable of reducing the mixing water consumption under the condition of maintaining the concrete slump constant. Most of them are anionic surfactants, such as lignosulfonate and naphthalene sulfonate formaldehyde polymer. After the concrete mixture is added, the cement particles are dispersed, the workability of the cement particles can be improved, the water consumption of raw materials per unit weight is reduced, and the fluidity of the concrete mixture is improved; or the unit cement consumption is reduced, and the cement is saved.
On the other hand, the preparation method of the A-grade inorganic slurry permeable fireproof heat-insulation board is adopted to prepare the A-grade inorganic slurry permeable fireproof heat-insulation board, and comprises the following steps: weighing water, portland cement, a polycarboxylic acid water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and hollow glass beads in a corresponding proportion, sequentially adding the mixture into a dispersion cylinder, and uniformly mixing to form homogeneous slurry for preparing the insulation board.
Further, the rotation speed in the mixing process of the homogeneous slurry is 500-1000r/min, and the temperature is 20-40 ℃.
Further, the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, the homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2mpa, and then the low-density polystyrene foam insulation board is cured and dried in the environment of 20-50 ℃ and the air humidity of 40-80%.
On the other hand, the application of the permeable fireproof insulation board made of the grade-A inorganic slurry is provided, and the insulation board made by the preparation method is used as an outer wall insulation material.
After adopting such design, the invention has at least the following advantages:
according to the invention, through the reasonable proportion of the portland cement and the magnesium carbonate, the usage amount is 0.2-0.4%, and through the excellent thermal decomposition chemical property of the magnesium carbonate, the overall heat value of the material is effectively reduced. The reasonable proportion can also reduce the production difficulty, the slurry is too thick and difficult to permeate when the proportion is too large, and the proportion is too small and cannot reduce the whole heat value. Through the reasonable proportion of the hollow glass beads and the portland cement, 20% -40% of the hollow glass beads are used, and through the low-density and high-filling-degree performance of the hollow glass beads, the whole weight of the plate is greatly reduced, so that the falling risk of an outer wall material is reduced while the construction difficulty is reduced, and the using amount of the bonding mortar is reduced. The hollow glass bead has extremely low heat conductivity coefficient, and the principle lies in blocking hot air convection, forming a plurality of discontinuous fire-resistant cavities in inorganic aggregate, and playing a role in improving heat-insulating performance. On the other hand, the material is inorganic, so that the combustible risk is avoided, and the calorific value performance of the product is not influenced. Compared with the prior art, the fireproof insulation board provided by the invention has the advantages that the types of the raw materials are convenient to obtain, the corresponding raw materials are low in price, and the production cost of an enterprise is greatly reduced on the premise of meeting the corresponding standards.
Detailed Description
The present invention is further illustrated by the following examples, but the present invention is not limited to the following examples, and any products similar or equivalent to the present invention, which are obtained by the teaching of the present invention, are within the scope of protection.
Example 1:
the raw materials of the embodiment comprise 7 parts of low-density polystyrene foam insulation board, 10 parts of portland cement, 10 parts of polycarboxylic acid high-performance water reducing agent, 20 parts of silica fume, 30 parts of water, 30 parts of vinyl acetate-ethylene copolymer emulsion, 5.5 parts of cellulose, 0.2 part of metakaolin, 30 parts of hollow glass microsphere and 0.3 part of magnesium carbonate.
The preparation method of the insulation board comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 35 ℃ and the air humidity of 60%.
The grade-A inorganic slurry permeable fireproof insulation board prepared in the embodiment is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame-retardant grade is grade-A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, and the apparent density is 113kg/m3The thermal conductivity coefficient is 0.042W/m.k, the heat value is 2.9MJ/KG, the compressive strength is 0.176MPa, the tensile strength is O.l5MPa, and the volume water absorption is 6 percent.
Example 2 (Standard)
The composition of the raw materials of this example is: 7.5 parts of low-density polystyrene foam insulation board, 8 parts of portland cement, 8 parts of polycarboxylic acid high-performance water reducing agent, 20 parts of silica fume, 30 parts of water, 30 parts of vinyl acetate-ethylene copolymer emulsion, 7 parts of cellulose, 0.3 part of metakaolin, 30 parts of hollow glass microsphere and 0.2 part of magnesium carbonate.
The preparation method of the insulation board comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in the environment of 40 ℃ and 70% of air humidity.
The grade-A inorganic slurry permeable fireproof insulation board prepared in the embodiment is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame-retardant grade is grade-A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, and the apparent density is 111kg/m3The heat conductivity coefficient is 0.0425W/m.k, the heat value is 2.7MJ/KG, the compressive strength is 0.180MPa, the tensile strength is O.l4MPa, and the volume water absorption rate is 6 percent.
Example 3 (Standard)
The composition of the raw materials of this example is: 7 parts of low-density polystyrene foam insulation board, 7.5 parts of portland cement, 7 parts of polycarboxylic acid high-performance water reducing agent, 18 parts of silica fume, 28 parts of water, 32 parts of vinyl acetate-ethylene copolymer emulsion, 9 parts of cellulose, 0.3 part of metakaolin, 35 parts of hollow glass microsphere and 0.2 part of magnesium carbonate.
The preparation method of the insulation board comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 30 ℃ and the air humidity of 50%.
The grade-A inorganic slurry permeable fireproof insulation board prepared in the embodiment is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame-retardant grade is grade-A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, the apparent density is 114KG/m3, the heat conductivity coefficient is 0.041W/m.k, the calorific value is 2.9MJ/KG, the compressive strength is 0.160MPa, the tensile strength is O.l1MPa, and the volume water absorption is 5%.
Comparative example 1 (without hollow glass beads)
The composition of the raw materials of this comparative example was compared with example 1 without adding hollow glass beads.
The preparation method of the insulation board of the comparative example comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 30 ℃ and the air humidity of 50%.
The grade A inorganic slurry permeable fireproof insulation board prepared by the comparative example is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame retardant grade is grade A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, and the apparent density is 83kg/m3The heat conductivity coefficient is 0.051W/m.k, the heat value is 6.0MJ/KG, the compressive strength is 0.90MPa, the tensile strength is O.08MPa, and the volume water absorption is 5 percent.
Comparative example 2 (sample without hollow glass beads)
The raw materials of the comparative example consist of: 7.3 parts of low-density polystyrene foam insulation board, 20 parts of portland cement, 9 parts of polycarboxylic acid high-performance water reducing agent, 25 parts of silica fume, 30 parts of water, 35 parts of vinyl acetate-ethylene copolymer emulsion, 9 parts of cellulose, 0.3 part of metakaolin and 0.4 part of magnesium carbonate.
The preparation method of the insulation board of the comparative example comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in the environment of 40 ℃ and 60% of air humidity.
A-grade inorganic slurry permeable fireproof insulation board prepared by the comparative exampleTesting according to GB 8624-2012 'fire performance grading of building materials and products' standard, wherein the fire-retardant grade is A2 grade; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, and the apparent density is 110kg/m3The heat conductivity coefficient is 0.059W/m.k, the heat value is 2.0MJ/KG, the compressive strength is 0.16MPa, the tensile strength is O.l4MPa, and the volume water absorption rate is 5 percent.
Comparative example 3 (sample without magnesium carbonate)
The raw materials of the comparative example consist of: 7.7 parts of low-density polystyrene foam insulation board, 10 parts of portland cement, 8 parts of polycarboxylic acid high-performance water reducing agent, 20 parts of silica fume, 28 parts of water, 30 parts of vinyl acetate-ethylene copolymer emulsion, 7 parts of cellulose, 0.3 part of metakaolin and 30 parts of hollow glass microspheres.
The preparation method of the insulation board of the comparative example comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 30 ℃ and the air humidity of 50%.
The grade-A inorganic slurry permeable fireproof insulation board prepared in the embodiment is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame-retardant grade is grade-A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, and the apparent density is 113kg/m3The heat conductivity coefficient is 0.043W/m.k, the heat value is 3.7MJ/KG, the compressive strength is 0.17MPa, the tensile strength is 0.l2MPa, and the volume water absorption is 6 percent.
Comparative example 4 (sample without magnesium carbonate)
The raw materials of the comparative example consist of: 7.8 parts of low-density polystyrene foam insulation board, 8 parts of portland cement, 9 parts of polycarboxylic acid high-performance water reducing agent, 24 parts of silica fume, 27 parts of water, 30 parts of vinyl acetate-ethylene copolymer emulsion, 7 parts of cellulose, 0.2 part of metakaolin and 34 parts of hollow glass beads.
The preparation method of the insulation board of the comparative example comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 30 ℃ and the air humidity of 50%.
The grade-A inorganic slurry permeable fireproof insulation board prepared in the embodiment is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame-retardant grade is grade-A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, the apparent density is 119KG/m3, the heat conductivity coefficient is 0.041W/m.k, the heat value is 4.0MJ/KG, the compressive strength is 0.15MPa, the tensile strength is O.l5MPa, and the volume water absorption is 6%.
Comparative example 5 (sample without magnesium carbonate and hollow glass beads)
The raw materials of the comparative example consist of: 7.7 parts of low-density polystyrene foam insulation board, 18 parts of portland cement, 19 parts of polycarboxylic acid high-performance water reducing agent, 24 parts of silica fume, 25 parts of water, 35 parts of vinyl acetate-ethylene copolymer emulsion, 9 parts of cellulose and 0.3 part of metakaolin.
The preparation method of the insulation board of the comparative example comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 30 ℃ and the air humidity of 50%.
The grade A inorganic slurry permeable fireproof insulation board prepared by the comparative example is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame retardant grade is grade A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, the apparent density is 108KG/m3, the heat conductivity is 0.058W/m.k, the heat value is 6.5MJ/KG, the compressive strength is 0.1MPa, the tensile strength is O.09MPa, and the volume water absorption is 5%.
Comparative example 6 (sample without magnesium carbonate and hollow glass beads)
The raw materials of the comparative example consist of: 7.8 parts of low-density polystyrene foam insulation board, 15 parts of portland cement, 21 parts of polycarboxylic acid high-performance water reducing agent, 20 parts of silica fume, 28 parts of water, 39 parts of vinyl acetate-ethylene copolymer emulsion, 9 parts of cellulose and 0.2 part of metakaolin.
The preparation method of the insulation board of the comparative example comprises the following steps: weighing water, portland cement, a polycarboxylic acid high-performance water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and the like in a corresponding proportion, sequentially adding the water, the portland cement, the polycarboxylic acid high-performance water reducing agent, the micro silicon powder, the metakaolin, the vinyl acetate-ethylene copolymer emulsion, the magnesium carbonate, the cellulose and the like into a high-speed multifunctional stirrer in sequence, and uniformly mixing the mixture at the rotation speed of 500r/min and the temperature of 20-50; the low-density polystyrene foam insulation board is placed on a conveyor belt of a board penetrating machine, homogeneous slurry is poured onto the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2MPa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 30 ℃ and the air humidity of 50%.
The grade-A inorganic slurry permeable fireproof insulation board prepared in the embodiment is tested according to the GB 8624-2012 'fire performance grading of building materials and products', and the fireproof flame-retardant grade is grade-A2; the test is carried out according to a corresponding detection method of JG/T536-2017 thermosetting composite polyethylene foam insulation board, and the apparent density is 110kg/m3The heat conductivity coefficient is 0.055W/m.k, the heat value is 5.8MJ/KG, the compressive strength is 0.19MPa, the tensile strength is O.l7MPa, and the volume water absorption is 6%.
In the above examples and comparative examples, the unit of the parts by weight of each substance may be in kilograms, and may also be in grams, tons or other weight units as long as the substances can be uniformly mixed.
In the above examples and comparative examples, the low density polystyrene foam insulation board was prepared by the following preparation method: polystyrene particles are used as raw materials, foaming is carried out firstly, then the polystyrene particles are injected into a board beating machine, the board beating is carried out under the conditions that the temperature is 100-150 ℃ and the pressure is 0.4-0.8MPa, local fusion occurs among the particles, the heat insulation board with certain uniformly distributed gaps is formed, and the size of the gaps is 3-5 mm.
In the above examples and comparative examples, the fineness of the silica fume was 150 mesh, the fineness of the metakaolin was 150 mesh, the fineness of the magnesium carbonate was 150 mesh, and the fineness of the hollow glass beads was 400 mesh.
From embodiments 1-3 and comparative examples 1-6, it can be known that when no hollow glass beads are added to the heat insulation material, the heat conductivity coefficient of the heat insulation board is greater than 0.045W/m.k, which is difficult to meet the enterprise standard requirements, and in practical application, for compounding the national 75 energy-saving requirements, the higher heat conductivity coefficient can cause a series of problems of excessive plate thickness, building super red line, cost increase, construction difficulty increase and the like. When magnesium carbonate is not added, the heat value of the heat-insulation board is larger than 3.0MJ/KG, so that the requirement of GB/T8624 standard on A2-grade heat-insulation materials can not be met, and the lack of the two materials can not meet the requirements of the heat-insulation board on low heat conductivity coefficient and low heat value.
Compared with the prior art, the invention adopts 525 type portland cement as the main inorganic gel substance, and has no risk of halogen return and chloride ion precipitation; by adding the polycarboxylic acid high-performance water reducing agent, the production energy consumption of the product is reduced, and the national call for energy conservation and emission reduction is responded; by adding the micro silicon powder and the metakaolin, higher plate strength and shorter curing period are realized; the addition of the vinyl acetate-ethylene copolymer emulsion improves the binding force between the inorganic slurry and the organic particles, realizes better tensile strength of the plate, and realizes the effects of lower volume weight and reduced heat conductivity coefficient of the plate by the addition of the hollow glass beads. The magnesium carbonate is added, so that the effect of low heat value and low manufacturing cost of the plate is realized, and compared with other plates sold in the market at present, the plate has the characteristics of low volume weight, high compressive strength, high tensile strength, short curing period, low heat conductivity coefficient, good hydrophobicity and excellent fireproof performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (10)
1. A grade-A inorganic slurry permeable fireproof heat-insulating material is characterized by comprising the following raw materials in parts by weight: 5-10 parts of Portland cement, 5-10 parts of polycarboxylic acid water reducing agent, 15-25 parts of silica fume, 25-30 parts of water, 20-35 parts of vinyl acetate-ethylene copolymer emulsion, 5-10 parts of cellulose, 0.2-0.5 part of metakaolin, 20-40 parts of hollow glass microsphere and 0.2-0.4 part of magnesium carbonate.
2. The A-stage inorganic slurry permeable fireproof insulation material of claim 1, further comprising a low density polystyrene foam insulation board in an amount of 5 to 10 parts by weight.
3. The grade a inorganic slurry permeable fireproof insulation material of claim 2, wherein the low density polystyrene foam insulation board is fire grade B1, and has a volume weight of 7-15kg/m3The heat insulation board.
4. The A-grade inorganic slurry permeable fireproof thermal insulation material according to claim 2 or 3, wherein the low-density polystyrene foam thermal insulation board is prepared by the following preparation method: polystyrene particles are used as raw materials, foaming is carried out firstly, then the polystyrene particles are injected into a board beating machine, the board beating is carried out under the conditions that the temperature is 100-150 ℃ and the pressure is 0.4-0.8MPa, local fusion occurs among the particles, the heat insulation board with certain uniformly distributed gaps is formed, and the size of the gaps is 3-5 mm.
5. The class a inorganic slurry permeable fire protection and thermal insulation material of any of claims 1 to 4, wherein the vinyl acetate-ethylene copolymer emulsion has a solids content of 50% to 60%;
and/or the vinyl acetate-ethylene copolymer emulsion has a minimum film forming temperature <0 ℃.
6. The permeable fireproof thermal insulation material for the grade A inorganic slurry according to any one of claims 1 to 5, wherein the fineness of the micro silicon powder is 150 meshes;
and/or the fineness of the metakaolin is 150 meshes;
and/or the fineness of the magnesium carbonate is 150 meshes;
and/or the fineness of the hollow glass beads is 400 meshes.
7. The grade A inorganic slurry permeable fireproof thermal insulation material of any one of claims 1 to 6, wherein the polycarboxylic acid water reducer is lignosulfonate and/or naphthalene sulfonate formaldehyde polymer.
8. A preparation method of an A-grade inorganic slurry permeable fireproof heat-insulation board is characterized in that the A-grade inorganic slurry permeable fireproof heat-insulation board is prepared by the method of any one of claims 1 to 7, and comprises the following steps: weighing water, portland cement, a polycarboxylic acid water reducing agent, micro silicon powder, metakaolin, a vinyl acetate-ethylene copolymer emulsion, magnesium carbonate, cellulose and hollow glass beads in a corresponding proportion, sequentially adding the mixture into a dispersion cylinder, and uniformly mixing to form homogeneous slurry for preparing the insulation board.
9. The preparation method of the A-level inorganic slurry permeable fireproof insulation board according to claim 8, wherein the low-density polystyrene foam insulation board is placed on a conveyor belt of a board permeable machine, the homogeneous slurry is poured on the upper surface of the low-density polystyrene foam insulation board, the lower surface of the low-density polystyrene foam insulation board is subjected to vacuum adsorption, the vacuum degree of the vacuum adsorption is 0.2mpa, and then the low-density polystyrene foam insulation board is cured and dried in an environment with the temperature of 20-50 ℃ and the air humidity of 40-80%.
10. The application of the A-grade inorganic slurry permeable fireproof insulation board is characterized in that the insulation board prepared by the preparation method of claim 8 or 9 is used as an outer wall insulation material.
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| CN113956017A (en) * | 2021-12-03 | 2022-01-21 | 昌吉市飞鸿新材料技术有限公司 | Energy-gathering fireproof insulation board slurry |
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