CN112500083A - High-temperature-resistant wood fiber reinforced silicate flat plate and preparation method thereof - Google Patents
High-temperature-resistant wood fiber reinforced silicate flat plate and preparation method thereof Download PDFInfo
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- CN112500083A CN112500083A CN202011528304.7A CN202011528304A CN112500083A CN 112500083 A CN112500083 A CN 112500083A CN 202011528304 A CN202011528304 A CN 202011528304A CN 112500083 A CN112500083 A CN 112500083A
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- wood fiber
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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
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/18—Waste materials; Refuse organic
- C04B18/24—Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper, cork
- C04B18/26—Wood, e.g. sawdust, wood shavings
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
-
- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to the technical field of high-temperature-resistant inorganic gel flat plates, and discloses a high-temperature-resistant wood fiber reinforced silicate flat plate which comprises the following components in parts by weight: the high-strength. The flat plate can endure the high temperature of 900-1200 ℃ for 2 hours and can keep the integrity; mechanical properties of the flat plate: the breaking strength reaches 11MPa, and the engineering requirement can be met.
Description
Technical Field
The invention relates to the technical field of high-temperature-resistant inorganic gel flat plates, in particular to a high-temperature-resistant wood fiber reinforced silicate flat plate and a preparation method thereof.
Background
The inorganic cementitious material flat plate with high temperature resistance (more than 900 ℃) is applied to nuclear power industry; high temperature resistant exhaust gas pipeline, high temperature resistant cable duct, the concrete structure fire protection of underpass, the fire protection of coal gas industry preparation superelevation prevents hot wall, superelevation steel structure building's girder post fire protection, the fire protection of key tunnel top. The high-requirement flat plates are usually made of high-temperature-resistant asbestos fiber reinforced silicate cementing materials (2400 multiplied by 1200 multiplied by 9-30 mm), and asbestos fibers are regarded as carcinogens by the world health organization and the labor organization and are prohibited from being used. The construction design specified by 4.1.8 in the unified GB50574-2010 wall material application standard in China cannot adopt plant fiber wall materials which contain asbestos fibers and are not subjected to anticorrosion and mothproof treatment.
And the flat plate which does not contain asbestos and is high temperature resistant and has the strength meeting the requirements of engineering mechanics and required by key engineering such as nuclear power and the like in China is required to be obtained from an import.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a flat material which is resistant to high temperature, has good mechanical properties, and does not contain asbestos.
Disclosure of Invention
The invention aims to provide a wood fiber reinforced silicate flat plate with high temperature resistance and good mechanical property, wherein wood fiber and wollastonite are used for replacing asbestos fiber to manufacture the high-temperature resistant silicate flat plate, so that the effects of fire prevention and high temperature resistance are achieved, and the mechanical strength of the high-temperature resistant silicate flat plate meets the engineering requirement.
In order to realize the purpose, the invention provides a high-temperature-resistant wood fiber reinforced silicate flat plate which comprises the following components in parts by weight: the high-strength.
Preferably, the wollastonite is 200-220 meshes; the mica has 80-85 meshes.
Preferably, the vermiculite is 80-85 meshes after expansion; the quartz is 200-mesh and 250-mesh, and the silicon content of the quartz is more than or equal to 95 percent; the expanded perlite is 80-85 meshes.
Preferably, the calcium hydroxide is 200-250 meshes, and the active calcium is more than 65 percent.
Preferably, the wood fiber is arbor or needle-leaved wood fiber with the length of 2-2.5 mm; the aluminum hydroxide is 300-310 meshes.
Preferably, the wollastonite is a chain-structure mineral, and the main components are as follows: 48.0% of CaO, SiO2 51.0％。
Preferably, mica and vermiculite are lamellar structure minerals, and the main component of mica is SiO2 45％、Al2O338％、K2O11.8 percent; vermiculite is mainly composed ofSiO2 42％、Al2O3 17％、Fe2O3 18％、MgO 23％。
Preferably, the quartz is a mineral with a framework structure, and the main component is SiO2 95～98％，Al2O3 1～2％；
Preferably, the high-temperature-resistant rock is perlite acid lava SiO2 74％、Al2O3 12％；
Preferably, carbonate mineral limestone, commercially available from: calcium hydroxide (activity 65-80%);
preferably, the Portland cement: 42.5, the content of silicate minerals is more than 65 percent, and the hydraulic cementing material is prepared;
the preferable wood fiber is arbor or softwood fiber (commodity: pulp board) fiber which can be broomed again, and the length is 2-2.5 mm.
Preferably, the aluminum hydroxide is a flame retardant (commercial product) with 300 meshes.
The invention also aims to provide a preparation method of the high-temperature-resistant wood fiber reinforced silicate flat plate, which comprises the following steps:
(1) weighing wollastonite, mica, vermiculite, quartz, perlite, calcium hydroxide, ordinary portland cement, wood fiber and aluminum hydroxide according to parts by weight;
(2) putting water, wood fiber pulp, aluminum hydroxide, wollastonite, quartz, calcium hydroxide, ordinary portland cement, mica, vermiculite and perlite into a pulping machine, and stirring into slurry with the concentration of 15-17%;
(3) enabling the slurry prepared in the step (2) to flow into running coarse cotton cloth, performing vacuum dehydration, enabling a single material layer to enter a cylinder for pressurization, winding the single material layer into a flat plate blank, adding a template, stacking the plate blank, putting the plate blank into a pre-curing chamber, demolding and stacking the plate blank again after pre-curing;
(4) placing the stacked plate blanks obtained in the step (3) into an autoclave for curing, adding saturated steam, slowly increasing the pressure to 1-1.2MPa within 4 hours, keeping the pressure constant at 185-190 ℃ for 9-11 hours, and then slowly reducing the pressure to 0 within 4 hours, wherein the water content of the flat plate is 25-27%;
(5) and (5) putting the flat plate prepared in the step (4) into a dryer to be dried until the water content is less than 10%, and modifying the flat plate to the required application size after drying.
Preferably, the wood fiber pulp in the step (2) is prepared by breaking wood fibers by a paper shredder, adding water, and pulping in a pulping machine until the concentration is 3-5%, and beating the fibers to a beating degree of 20-30.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A high-temperature-resistant wood fiber reinforced silicate flat plate comprises the following components in parts by weight: the high-strength.
Example 1
In this example, a high temperature resistant wood fiber reinforced silicate flat plate comprises, by weight: the high-strength concrete is prepared from 18 parts of wollastonite, 5 parts of mica, 4 parts of vermiculite, 18 parts of quartz, 4 parts of perlite, 15 parts of calcium hydroxide, 8 parts of ordinary portland cement, 4 parts of wood fiber and 5 parts of aluminum hydroxide.
(1) Weighing wollastonite, mica, vermiculite, quartz, perlite, calcium hydroxide, ordinary portland cement, wood fiber and aluminum hydroxide according to the weight parts; wherein, wood fiber is firstly broken by a paper shredder, water is ground into pulp in a pulp grinder until the concentration is 3 percent, and the fiber is brushed to the beating degree of 20 to prepare wood fiber pulp;
(2) sequentially adding industrial water, wood fiber pulp, aluminum hydroxide, wollastonite, quartz, calcium hydroxide, ordinary portland cement, mica, vermiculite and perlite into a pulping machine, and stirring into slurry with the concentration of 15%;
(3) enabling the slurry prepared in the step (2) to flow into running coarse cotton cloth, performing vacuum dehydration, enabling a single material layer to enter a cylinder for pressurization, winding the single material layer into a flat plate blank, adding a template, stacking the plate blank, putting the plate blank into a pre-curing chamber, demolding and stacking the plate blank again after pre-curing;
(4) placing the stacked plate blanks obtained in the step (3) into an autoclave for curing, adding saturated steam, slowly increasing the pressure to 1MPa within 4 hours, keeping the pressure constant at 185 ℃ for 9 hours, and then slowly reducing the pressure to 0 within 4 hours, wherein the water content of the flat plate is 25%;
(5) and (5) putting the flat plate prepared in the step (4) into a dryer to be dried until the water content is less than 10%, and modifying the flat plate to the required application size after drying.
In this embodiment, the flat plate in step (5) is modified to a high temperature resistant plate with a plate thickness of 9mm (2440 × 1220mm), and the physical properties of the high temperature resistant plate in this embodiment are shown in table 1:
TABLE 1
Example 2
In this example, the distinctive feature compared with example 1 is that: a high-temperature-resistant wood fiber reinforced silicate flat plate comprises the following components in parts by weight: the high-strength concrete is prepared from 24 parts of wollastonite, 6 parts of mica, 5 parts of vermiculite, 25 parts of quartz, 5 parts of perlite, 21 parts of calcium hydroxide, 12 parts of ordinary portland cement, 8 parts of wood fiber and 8 parts of aluminum hydroxide.
(1) Weighing wollastonite, mica, vermiculite, quartz, perlite, calcium hydroxide, ordinary portland cement, wood fiber and aluminum hydroxide according to the weight parts; wherein, wood fiber is firstly broken by a paper shredder, water is ground into pulp in a pulp grinder until the concentration is 4 percent, and the fiber is brushed until the beating degree is 25, so as to prepare wood fiber pulp;
(2) sequentially adding industrial water, wood fiber slurry, aluminum hydroxide, wollastonite, quartz, calcium hydroxide, ordinary portland cement, mica, vermiculite and perlite, and stirring into slurry with the concentration of 16%;
(3) enabling the slurry prepared in the step (2) to flow into running coarse cotton cloth, performing vacuum dehydration, enabling a single material layer to enter a cylinder for pressurization, winding the single material layer into a flat plate blank, adding a template, stacking the plate blank, putting the plate blank into a pre-curing chamber, demolding and stacking the plate blank again after pre-curing;
(4) placing the stacked plate blanks obtained in the step (3) into an autoclave for curing, adding saturated steam, slowly increasing the pressure to 1.1MPa within 4 hours, keeping the pressure constant at 190 ℃ for 10 hours, and then slowly reducing the pressure to 0 within 4 hours, wherein the water content of the flat plate is 26%;
(5) and (5) putting the flat plate prepared in the step (4) into a dryer to be dried until the water content is less than 10%, and modifying the flat plate to the required application size after drying.
In this embodiment, the flat plate in step (5) is modified to a high temperature resistant plate with a plate thickness of 9mm (2440 × 1220mm), and the physical properties of the high temperature resistant plate in this embodiment are shown in table 2:
TABLE 2
Example 3
A high-temperature-resistant wood fiber reinforced silicate flat plate comprises the following components in parts by weight: the high-strength concrete is prepared from 20 parts of wollastonite, 6 parts of mica, 5 parts of vermiculite, 22 parts of quartz, 4 parts of perlite, 18 parts of calcium hydroxide, 10 parts of ordinary portland cement, 6 parts of wood fiber and 6 parts of aluminum hydroxide.
(1) Weighing wollastonite, mica, vermiculite, quartz, perlite, calcium hydroxide, ordinary portland cement, wood fiber and aluminum hydroxide according to the weight parts; wherein, wood fiber is firstly broken by a paper shredder, water is ground into pulp in a pulp grinder until the concentration is 5 percent, and the fiber is brushed until the beating degree is 30, so as to prepare wood fiber pulp;
(2) sequentially adding industrial water, wood fiber pulp, aluminum hydroxide, wollastonite, quartz, calcium hydroxide, ordinary portland cement, mica, vermiculite and perlite into a pulping machine, and stirring into slurry with the concentration of 17%;
(3) enabling the slurry prepared in the step (2) to flow into running coarse cotton cloth, performing vacuum dehydration, enabling a single material layer to enter a cylinder for pressurization, winding the single material layer into a flat plate blank, adding a template, stacking the plate blank, putting the plate blank into a pre-curing chamber, demolding and stacking the plate blank again after pre-curing;
(4) placing the stacked plate blanks obtained in the step (3) into an autoclave for curing, adding saturated steam, slowly increasing the pressure to 1.2MPa within 4 hours, keeping the pressure constant at 190 ℃ for 11 hours, and then slowly reducing the pressure to 0 within 4 hours, wherein the water content of the flat plate is 27%;
(5) and (5) putting the flat plate prepared in the step (4) into a dryer to be dried until the water content is less than 10%, and modifying the flat plate to the required application size after drying.
In this embodiment, the flat plate obtained in step (5) is modified to a high temperature resistant plate with a plate thickness of 9mm (2440 × 1220mm), and the physical properties of the high temperature resistant plate in this embodiment are shown in table 3:
TABLE 3
Example 4
The high temperature resistance of the flat plate members manufactured in examples 1 to 3 was measured:
1) flat plate 9mm (2440X 1220mm)
The test pieces in the embodiments 1 to 3 are respectively manufactured into a fire-resistant horizontal ventilating duct according to GB/T17428-2009 fire-resistant testing method for the ventilating duct, and according to the ventilation requirement of GB/T9978 fire-resistant testing method for building components, the fire-resistant integrity and the fire-resistant heat-insulating property of the fire inside and outside the test piece pipe after burning for 2 hours at 1200 ℃ meet the standard requirement.
2) Flat plate 24mm (2440X 1220mm)
According to the fireproof requirement of the tunnel: the plates prepared in examples 1-3 were tested to meet the fire resistance and fire protection requirements under RABT heating conditions, i.e., the temperature of the fire-facing surface of the plate was increased to 1200 ℃ within 5 minutes and held for 2 hours, and then immediately cooled to room temperature within 2 hours.
From the above embodiments, the invention provides a high-temperature resistant wood fiber reinforced silicate flat plate and a preparation method thereof, and the flat plate has excellent mechanical properties and simultaneously meets the requirements of fire resistance and fire resistance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A high-temperature-resistant wood fiber reinforced silicate flat plate is characterized by comprising the following components in parts by weight: the high-strength.
2. The high temperature resistant wood fiber reinforced silicate plate as claimed in claim 1, wherein the wollastonite is 200-220 mesh; the mica has 80-85 meshes.
3. The high temperature resistant wood fiber reinforced silicate board according to claim 1, wherein the vermiculite is expanded to 80-85 mesh; the quartz is 200-mesh and 250-mesh, and the silicon content of the quartz is more than or equal to 95 percent; the expanded perlite is 80-85 meshes.
4. The high temperature resistant wood fiber reinforced silicate plate as claimed in claim 1, wherein the calcium hydroxide is 200-250 mesh and the active calcium is > 65%.
5. The high temperature resistant wood fiber reinforced silicate board according to claim 1, wherein the wood fiber is arbor or softwood fiber, 2-2.5mm long; the aluminum hydroxide is 300-310 meshes.
6. A method for preparing a high temperature resistant wood fiber reinforced silicate slab as claimed in any one of claims 1 to 5, comprising the steps of:
(1) weighing wollastonite, mica, vermiculite, quartz, perlite, calcium hydroxide, ordinary portland cement, wood fiber and aluminum hydroxide according to parts by weight;
(2) putting water, wood fiber pulp, aluminum hydroxide, wollastonite, quartz, calcium hydroxide, ordinary portland cement, mica, vermiculite and perlite into a pulping machine, and stirring into slurry with the concentration of 15-17%;
(3) enabling the slurry prepared in the step (2) to flow into running coarse cotton cloth, performing vacuum dehydration, enabling a single material layer to enter a cylinder for pressurization, winding the single material layer into a flat plate blank, adding a template, stacking the plate blank, putting the plate blank into a pre-curing chamber, demolding and stacking the plate blank again after pre-curing;
(4) placing the stacked plate blanks obtained in the step (3) into an autoclave for curing, adding saturated steam, slowly increasing the pressure to 1-1.2MPa within 4 hours, keeping the pressure constant at 185-190 ℃ for 9-11 hours, and then slowly reducing the pressure to 0 within 4 hours, wherein the water content of the flat plate is 25-27%;
(5) and (5) putting the flat plate prepared in the step (4) into a dryer to be dried until the water content is less than 10%, and modifying the flat plate to the required application size after drying.
7. The method for preparing the high-temperature-resistant wood fiber reinforced silicate flat plate according to claim 6, wherein the wood fiber pulp in the step (2) is prepared by breaking wood fibers by a paper shredder, adding water, and pulping the wood fibers in a pulping machine until the concentration is 3-5%, and beating the fibers to a beating degree of 20-30.
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Cited By (3)
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| CN113416050A (en) * | 2021-07-21 | 2021-09-21 | 陕西建工建材科技有限公司 | Asbestos-free light high-strength fireproof calcium silicate board and preparation method thereof |
| CN114380553A (en) * | 2021-12-29 | 2022-04-22 | 江西远洋威利实业有限公司 | Fire-resistant silicate fireproof FCA board and preparation method thereof |
| CN115557756A (en) * | 2022-11-03 | 2023-01-03 | 华新水泥股份有限公司 | Carbonized board based on low-grade low-carbon cement clinker and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113416050A (en) * | 2021-07-21 | 2021-09-21 | 陕西建工建材科技有限公司 | Asbestos-free light high-strength fireproof calcium silicate board and preparation method thereof |
| CN113416050B (en) * | 2021-07-21 | 2023-02-03 | 陕西建工建材科技有限公司 | Asbestos-free light high-strength fireproof calcium silicate board and preparation method thereof |
| CN114380553A (en) * | 2021-12-29 | 2022-04-22 | 江西远洋威利实业有限公司 | Fire-resistant silicate fireproof FCA board and preparation method thereof |
| CN115557756A (en) * | 2022-11-03 | 2023-01-03 | 华新水泥股份有限公司 | Carbonized board based on low-grade low-carbon cement clinker and preparation method thereof |
| CN115557756B (en) * | 2022-11-03 | 2023-11-03 | 华新水泥股份有限公司 | Carbonized plate based on low-grade low-carbon cement clinker and preparation method thereof |
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