CN115108804A - Inorganic adhesive composite wood for structure and preparation method and application thereof - Google Patents
Inorganic adhesive composite wood for structure and preparation method and application thereof Download PDFInfo
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- CN115108804A CN115108804A CN202210821210.1A CN202210821210A CN115108804A CN 115108804 A CN115108804 A CN 115108804A CN 202210821210 A CN202210821210 A CN 202210821210A CN 115108804 A CN115108804 A CN 115108804A
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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
- C04B28/30—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 magnesium cements or similar 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
- 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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- 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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- 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 belongs to the technical field of advanced inorganic non-metallic materials, relates to a material for a building structure, and belongs to an inorganic adhesive composite wood for a structure as well as a preparation method and application thereof. Comprises wood chips and inorganic glue; the wood chips are obtained by processing fast-growing trees in the fast-growing forest; the inorganic adhesive comprises the following raw materials in percentage by mass: 100 parts of magnesium oxide, 20-60 parts of magnesium sulfate heptahydrate, 0-10 parts of silica fume, 0.5-30 parts of fly ash, 0.1-3 parts of silica sol, 0.5-3 parts of sodium silicate, 0.2-3 parts of citric acid, 0.05-2 parts of nano cellulose, 0-10 parts of wollastonite powder, 0-8 parts of fiber and 40-80 parts of water. The inorganic adhesive composite wood formed by combining the fast-growing woods serving as the raw materials with the inorganic adhesive has better mechanical property, fire resistance and durability, and can be used as a structural material.
Description
Technical Field
The invention belongs to the technical field of advanced inorganic non-metallic materials, relates to a material for a building structure, and belongs to an inorganic adhesive composite wood for a structure as well as a preparation method and application thereof.
Background
The information in this background section is disclosed only to augment the present invention
The general background is understood not to necessarily constitute an admission or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.
Building structure (e.g., column, beam, floor) materials, especially high-rise building structure materials, have high requirements for mechanical properties, durability and fire-proof performance of the materials themselves, and include renewable materials such as wood, and non-renewable materials such as concrete, steel bars, bricks, sand, stone, etc. Among them, structural lumber has high requirements for forest trees, such as higher diameter, higher tree quality, and the like, and thus has higher cost. But adopts non-renewable materials, which are seriously dependent on non-renewable natural resources and are not beneficial to environmental protection. Therefore, the invention provides an inorganic adhesive for a bamboo structure (publication number CN111393130A), and the inorganic adhesive and bamboo filaments are compounded into a recombined bamboo, so that the recombined bamboo has excellent mechanical property, durability, fire resistance and the like.
However, the growth of bamboo is sensitive to temperature, and only grows in a specific area, and is characterized by concentrated distribution, so that the bamboo is mainly distributed in tropical, subtropical and warm-warm areas, for example, China, and the bamboo is mainly distributed in southern China. If the bamboo is produced and used in areas (such as northern China) lacking bamboo raw materials, the transportation and storage costs are increased, and the large-scale application of the recombined bamboo is not facilitated.
The fast-growing forest has less limitation on regions and lower cost, so that the fast-growing forest is adopted as a raw material of building structure materials, and the cost is reduced. However, the fast-growing forest is an artificial forest with short felling period, and due to the defects of soft material and low strength, the fast-growing forest can only be used for paper making and furniture products, and cannot be used as a building structure material alone. Meanwhile, the distribution of the xylem and phloem in the vascular bundle of the bamboo is completely different from that of the fast-growing forest, and the vascular bundle of the bamboo does not have a forming layer, so that the difference of the composition and the physical and mechanical properties of the bamboo and the fast-growing forest is large, the difference of the permeability and the adhesion of the inorganic adhesive in the bamboo material is also large, in addition, the mechanical property and the rigidity of the bamboo material are large, the difference of the cooperative working capacity after the inorganic adhesive is compounded is also large, and the inorganic adhesive suitable for the fast-growing wood is required to be provided according to the characteristics of the fast-growing wood so as to prepare the inorganic adhesive composite wood serving as a structural material.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the inorganic adhesive composite wood for the structure and the preparation method and application thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows:
on one hand, the inorganic glue composite wood for the structure comprises wood chips and inorganic glue, wherein the volume ratio of the wood chips to the inorganic glue is 2.8-1.1; the wood chips are obtained by processing fast-growing trees in the fast-growing forest;
the inorganic adhesive comprises the following raw materials in percentage by mass: 100 parts of magnesium oxide, 20-60 parts of magnesium sulfate heptahydrate, 1-10 parts of silica fume, 0.5-30 parts of fly ash, 0.1-3 parts of silica sol, 0.5-3 parts of sodium silicate, 0.2-3 parts of citric acid, 0.05-2 parts of nano cellulose, 0-10 parts of wollastonite powder, 0-8 parts of fiber and 40-80 parts of water.
The invention takes magnesium oxysulfate formed by magnesium oxide and magnesium sulfate heptahydrate as the gel base material of the inorganic adhesive, and has better fire resistance, heat preservation, durability and environmental protection. However, magnesium oxysulfate itself has disadvantages of low strength, poor water resistance, and the like. Therefore, silica fume, silica sol, lithium silicate, sodium silicate, citric acid and nano-cellulose are required to be added for modification.
Researches show that in the inorganic glue composite wood formed by taking fast-growing forests as a matrix and taking magnesium oxysulfate as an inorganic glue, the magnesium oxysulfate modified by adopting silica fume, silica sol, lithium silicate, sodium silicate, citric acid and nanocellulose can improve the early strength of the composite wood, but the later strength is not obviously improved, so that the later strength of the composite wood can be obviously improved by adding the fly ash. In addition, the fast-growing forest is soft in material and low in density, so that the fast-growing forest is easy to absorb moisture, the mechanical property after moisture absorption can be further reduced, namely the water resistance is poor, and the water resistance of the composite wood can be improved after the fly ash is added, so that the stability of the mechanical property of the composite wood under different humidity conditions is ensured. Because the magnesium oxysulfate has ultrahigh fire resistance (1600-1800 ℃), the composite wood is mainly dependent on the fire resistance of the magnesium oxysulfate, so that the fire resistance of the composite wood based on the fast-growing forest is improved, and the content of the magnesium oxysulfate in the composite wood is inevitably reduced after other raw materials are added, so that the addition of other materials can reduce other properties of the composite wood, such as fire resistance, early strength and the like. However, experiments show that after the fly ash is added, the reduction of other properties (such as fire resistance, early strength and the like) can be avoided on the premise of improving the later strength and the water resistance of the composite wood, so that the composite wood based on the fast-growing forest has the advantages of high mechanical property, high fire resistance, high durability and the like.
In addition, the addition of wollastonite powder can improve the high temperature resistance of the fast-growing forest based composite wood. The addition of the fiber can reduce the shrinkage of the colloid and improve the ductility of the colloid. Further improving the comprehensive performance of the composite wood based on the fast-growing forest.
In another aspect, a method for preparing the inorganic adhesive composite wood for a structure comprises the following steps:
mixing the raw materials according to the inorganic adhesive proportion to form inorganic adhesive slurry;
and adding the inorganic adhesive slurry and the wood chips into a mold, pressing and molding, and maintaining to obtain the wood-plastic composite board.
In a third aspect, the application of the inorganic adhesive composite wood for the structure in building construction is provided.
The invention has the beneficial effects that:
according to the invention, the magnesium oxysulfate inorganic adhesive is compounded with the fast-growing forest to form the structural inorganic adhesive composite wood with the advantages of high mechanical property, high fire resistance, high durability and the like, and various properties of the composite wood based on the fast-growing forest can be comprehensively improved by adding the fly ash, the wollastonite powder and the fiber.
The inorganic adhesive provided by the invention has the following properties: the rupture strength of 7 days is 7-10 MPa; the compressive strength of 7d is 50-70 MPa; the rupture strength of the steel plate is 9-20.0 MPa after 28 days; the 28d compressive strength is 70-105 Mpa, and the softening coefficient reaches more than 0.96.
The performance of the inorganic adhesive composite wood for the structure provided by the invention is as follows: the 28-day grain compressive strength is 40-70 MPa, the 28-day grain tensile strength is 30-45 MPa, the 28-day bending strength is 50-85 MPa, the inorganic glue composite wood without any fireproof treatment has a combustion performance grade of more than B1 grade, even can reach A grade, and the fire endurance of a column, a beam and a floor slab prepared by the composite material can respectively reach more than 2h, 1h and 0.5 h.
The inorganic adhesive composite wood provided by the invention has the advantages of no release of harmful substances, high strength, fire resistance and durability.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention provides an inorganic glue composite wood for a structure, a preparation method and application thereof, which aim to solve the problems that bamboo raw materials are limited by regions and fast-growing forests are not suitable for being used as structural materials due to soft materials and low strength.
In an exemplary embodiment of the present invention, there is provided an inorganic cement composite lumber for structure, including a wood chip and an inorganic cement; the volume ratio of the wood chips to the inorganic glue is 2.8-1.1; the wood chips are obtained by processing fast-growing trees in the fast-growing forest;
the inorganic adhesive comprises the following raw materials in percentage by mass: 100 parts of magnesium oxide, 20-60 parts of magnesium sulfate heptahydrate, 1-10 parts of silica fume, 0.5-30 parts of fly ash, 0.1-3 parts of silica sol, 0.5-3 parts of sodium silicate, 0.2-3 parts of citric acid, 0.05-2 parts of nano cellulose, 0-10 parts of wollastonite powder, 0-8 parts of fiber and 40-80 parts of water.
The magnesium oxide is light calcined magnesium oxide, the performance of the inorganic glue is related to the activity of the light calcined magnesium oxide, the higher the activity of the light calcined magnesium oxide is, the better the performance of the inorganic glue (such as the strength of a hydration product) is, and in some examples of the embodiment, the activity of the magnesium oxide is not less than 50.
The magnesium sulfate heptahydrate disclosed by the invention is an industrial product, so that the cost is lower. The performance of the inorganic gum is related to the effective amount of magnesium sulfate heptahydrate, the higher the effective amount of magnesium sulfate heptahydrate, the better the performance of the inorganic gum (e.g., the strength of the hydrated product), and in some embodiments, the effective amount of magnesium sulfate heptahydrate is no less than 90%.
The content of silicon dioxide in the silica fume is not less than 90%. The content of silica fume increases, can make the viscosity of inorganic mortar body increase, improves the hydration product, improves compound timber's water resistance and intensity, when the quantity was too high, can reduce the adhesive property of inorganic mortar body, increases compound timber's fragility for the fracture risk that accords with timber improves. Meanwhile, the performance of the inorganic adhesive is related to the silica fume granularity, and the proper silica fume granularity is beneficial to the adjustment of the microstructure of a hydration product, so that the performance (such as strength) of the inorganic adhesive is improved. In some examples of this embodiment, the silica fume has a particle size of 50 to 260 nm.
The particle size of the silica sol is related to the bonding performance and the permeability of the inorganic adhesive, and in some embodiments, the particle size of the silica sol is 7-25 nm. Research shows that the inorganic glue formed by the silica sol has better cohesiveness and permeability at the granularity.
The sodium silicate is in a solid state or a liquid state. The binding performance of the inorganic glue is related to the modulus of sodium silicate, and the binding performance increases as the modulus of sodium silicate increases. However, as the modulus of sodium silicate increases, the water solubility of sodium silicate decreases, and the water solubility decreases such that a portion of sodium silicate cannot be dissolved, resulting in a relative decrease in binding property. Thus in some examples of this embodiment, the sodium silicate has a modulus of 1.5 to 3.0. The lithium silicate with the modulus can ensure the dissolving capacity and ensure that the inorganic adhesive obtains better bonding performance in the inorganic adhesive system of the invention. When the sodium silicate is solid, it needs to be added into water in advance to be dissolved.
According to the invention, the silica sol and the sodium silicate are compounded for use, so that the single-component use condition is avoided, the specific modulus dissolving capacity is avoided, the viscosity of the inorganic adhesive is obviously improved, and the bonding property and the water resistance of the inorganic adhesive are improved.
The citric acid is added into the inorganic glue system, so that hydration products of the inorganic glue can be changed, more stable phases are formed, and the performance of the inorganic glue is ensured. When the addition amount of the citric acid is too low, a formed stable phase is less, and the performance of the inorganic adhesive is poorer; when the addition amount of citric acid is too high, the humidity hydration product is abnormal in coagulation, and even cracks are generated in the hardened microstructure, so that the performance of the inorganic adhesive is reduced. The purity of the citric acid in the invention is related to the effective components in the inorganic glue, and the effective components are improved along with the improvement of the purity of the citric acid. The improvement of the effective components is beneficial to the improvement of the performance (such as strength, fire resistance, durability and the like) of the inorganic adhesive. Thus in some embodiments of this embodiment, the citric acid is not less than 95% pure.
The nano-cellulose is prepared from plant fibers, and a finished product of the nano-cellulose can be in a liquid state or a solid state, and when the finished product is in the solid state, the nano-cellulose needs to be added into water in advance to be uniformly dispersed. In some examples of this embodiment, the nanocellulose has a diameter of 5 to 20nm and a length of 100 to 600 nm. Is more beneficial to the bonding of the inorganic adhesive and the fast-growing forest.
In the invention, silica fume, fly ash, silica sol, sodium silicate, citric acid, nano-cellulose, wollastonite powder and fiber are added into a gel base material of magnesium oxysulfate, and the bonding property and permeability of inorganic glue are increased by optimizing material proportion and dosage collocation, adopting nano-modification, granularity optimization, viscosity adjustment, toughening, crack resistance, water resistance, fire resistance and modification and the like, and the inorganic glue is compounded with fast-growing woods to form the composite wood.
The addition of the wollastonite powder is beneficial to improving the high-temperature resistance of the inorganic adhesive. The research shows that the effective component (Ca) 3 (Si 3 O 9 ) Content and particle size versus inorganicThe high temperature resistance of the adhesive is improved, in some examples of the embodiment, the content of the active ingredients of the wollastonite powder is not less than 60%, and the particle size is 10-40 μm. The high temperature resistance of the inorganic adhesive can be better improved under the condition.
The added fiber is organic synthetic fiber. The inorganic adhesive system provided by the invention has the problem of shrinkage in the gelling process, and in the bonding and compounding process with fast-growing forests, the shrinkage of the inorganic adhesive easily causes defects in the composite material, so that the performance of the formed composite wood is improved relatively low, and therefore, the added fiber can reduce the shrinkage of the inorganic adhesive, improve the relatively low ductility and obviously improve the performance of the composite wood. In some examples of this embodiment, the fibers have a length of 16 to 22mm and a diameter of 20 to 26 μm. Under such conditions, the shrinkage of the composite material can be further reduced. In addition, the nano-cellulose and the wood material are the same in base, so that the bonding and permeability between the inorganic adhesive and the fast-growing forest can be greatly enhanced.
After the fiber and the nano-cellulose are compounded for use, the nano-micron dimension can be formed in the radial direction of the fiber, and the toughness and the crack resistance of the composite wood can be improved on the micro and macro scales.
In some examples of this embodiment, the coating comprises 100 parts of magnesium oxide, 30-50 parts of magnesium sulfate heptahydrate, 1-6 parts of silica fume, 10-30 parts of fly ash, 0.1-1 part of silica sol, 0.5-1 part of sodium silicate, 0.2-2 parts of citric acid, 0.05-1 part of nanocellulose, 2-8 parts of wollastonite powder, 0.3-8 parts of fiber and 40-80 parts of water. The inorganic adhesive prepared according to the proportion has better fireproof, temperature-resistant and durable performances.
In some examples of this embodiment, the coating comprises 100 parts of magnesium oxide, 40-50 parts of magnesium sulfate heptahydrate, 1-6 parts of silica fume, 14-30 parts of fly ash, 0.1-0.5 part of silica sol, 0.8-1 part of sodium silicate, 0.2-1.5 parts of citric acid, 0.05-0.5 part of nanocellulose, 3-7 parts of wollastonite powder, 3-7 parts of fiber and 40-60 parts of water. The inorganic adhesive prepared according to the proportion has better fireproof, temperature-resistant, durable and mechanical properties.
In some examples of this embodiment, the magnesium oxide is 100 parts, the magnesium sulfate heptahydrate is 42-48 parts, the silica fume is 4-6 parts, the fly ash is 14-16 parts, the silica sol is 0.5-0.6 part, the sodium silicate is 0.9-1 part, the citric acid is 1.4-1.5 parts, the nanocellulose is 0.08-0.12 part, the wollastonite powder is 4-6 parts, the fiber is 4-6 parts, and the water is 40-50 parts. The inorganic adhesive prepared according to the proportion has better temperature resistance and durability, and particularly the fire resistance and the later mechanical property are obviously improved.
In some examples of this embodiment, the fast-growing trees of the fast-growing forest include fast-growing poplar, fast-growing eucalyptus, hong senhua, fast-growing phoenix tree, fast-growing fir, fast-growing catalpa tree, fast-growing willow, fast-growing white wax, and the like.
The material proportion is slightly different for different fast-growing forest tree species.
When the fast-growing trees of the fast-growing forest are fast-growing poplars, the volume ratio of the wood chips to the inorganic glue is as follows: 2.5 to 1.3;
when the fast-growing trees of the fast-growing forest are fast-growing eucalyptus, the volume ratio of the wood chips to the inorganic glue is as follows: 2.2 to 1.2;
when the fast-growing trees of the fast-growing forest are Hongsen locust, the proportion of the wood chips to the inorganic glue is as follows: 2.8 to 1.7;
when the fast-growing trees of the fast-growing forest are fast-growing fago, the proportion of the wood chips to the inorganic glue is as follows: 2 to 1.1;
when the fast-growing trees of the fast-growing forest are fast-growing catalpa bungei, the ratio of the wood chips to the inorganic glue is as follows: 2.7 to 1.6;
when the fast-growing trees of the fast-growing forest are fast-growing willows, the proportion of the wood chips to the inorganic glue is as follows: 2.75 to 1.65;
when the fast-growing trees of the fast-growing forest are fast-growing white wax, the ratio of the wood chips to the inorganic glue is as follows: 2.6 to 1.5.
In another embodiment of the present invention, a method for preparing the inorganic adhesive composite wood for a structure is provided, which includes:
mixing the raw materials according to the inorganic adhesive proportion to form inorganic adhesive slurry;
and adding the inorganic adhesive slurry and the wood chips into a mold, pressing and molding, and maintaining to obtain the wood-plastic composite board.
More specifically, when neither the wollastonite powder nor the fiber is 0, the preparation process of the inorganic cement slurry is as follows: adding magnesium sulfate heptahydrate into water to dissolve the magnesium sulfate heptahydrate into magnesium sulfate water solution, adding nano-cellulose into the magnesium sulfate water solution, stirring the nano-cellulose uniformly, adding silica sol, citric acid and sodium silicate, continuously stirring the nano-cellulose uniformly, adding magnesium oxide, silica fume and wollastonite powder, continuously stirring the mixture uniformly, adding fibers, and stirring the mixture uniformly.
When the wollastonite powder is 0 and the fiber is not 0, the preparation process of the inorganic cement slurry comprises the following steps: adding magnesium sulfate heptahydrate into water to dissolve to prepare a magnesium sulfate aqueous solution, adding nanocellulose into the magnesium sulfate aqueous solution, uniformly stirring, adding silica sol, citric acid and sodium silicate, continuously uniformly stirring, then adding magnesium oxide and silica fume, continuously uniformly stirring, finally adding fibers, and uniformly stirring.
When the fiber is 0 and the wollastonite powder is not 0, the preparation process of the inorganic cement paste comprises the following steps: adding magnesium sulfate heptahydrate into water to dissolve the magnesium sulfate heptahydrate into magnesium sulfate water solution, adding nano-cellulose into the magnesium sulfate water solution, stirring the nano-cellulose uniformly, adding silica sol, citric acid and sodium silicate, continuously stirring the mixture uniformly, adding magnesium oxide, silica fume and wollastonite powder, and continuously stirring the mixture uniformly.
When the wollastonite powder and the fiber are both 0, the preparation process of the inorganic cement paste is as follows: adding magnesium sulfate heptahydrate into water to dissolve the magnesium sulfate heptahydrate into magnesium sulfate water solution, adding nano-cellulose into the magnesium sulfate water solution, stirring the nano-cellulose uniformly, adding silica sol, citric acid and sodium silicate, continuously stirring the mixture uniformly, adding magnesium oxide and silica fume, and continuously stirring the mixture uniformly.
More specifically, the temperature for preparing the magnesium sulfate aqueous solution is 30-40 ℃. The magnesium sulfate is dissolved at the temperature, and the product performance is ensured.
When the sodium silicate is solid, the sodium silicate is added with water to prepare a solution, and then the solution is added in the form of solution, so that the solution is dissolved and dispersed uniformly, and the effect of the solution is better exerted. In the process of preparing the solid sodium silicate into the solution, the mass ratio of the sodium silicate to the water is 1: 2-3, and the stirring time is 1-2 minutes.
More specifically, the wood chips are soaked in the inorganic cement slurry to enable the wood chips to be uniformly dipped, and then the wood chips are added into a mold to be pressed. The pressing pressure is 0.5-5 MPa.
In order to ensure the wood chips to be uniformly impregnated, more specifically, the wood chips are impregnated layer by layer and are placed in a mold.
In a third embodiment of the present invention, there is provided an application of the inorganic adhesive composite wood for a structure in building construction.
More particularly, in the preparation of building columns, beams and/or floors, which are further used in the construction of buildings.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
The raw materials are selected as follows:
magnesium oxide: light burned magnesium oxide, active 56.
Magnesium sulfate heptahydrate: industrial grade, 95% effective content.
Silica fume: amorphous SiO 2 95 percent of the content and 40-200nm of granularity.
Fly ash: first order, activity index 90%.
Silica sol: particle size of 10-20nm, liquid, concentration of 40%.
Sodium silicate: liquid, modulus 2.6.
Citric acid: purity 98% and powder.
Nano-cellulose: the pulp is prepared, the diameter is 8-15nm, the length is 200-300nm, and the pulp is liquid.
Wollastonite powder: available Ca 3 (Si 3 O 9 ) Content is 80%, and particle diameter is 10-30 μm.
Fiber: the organic synthetic fiber has a length of 16-20mm and a diameter of 20-25 μm.
Water: clean tap water.
The wood chips are fast-growing poplar wood chips.
The weight portions of the raw materials are as follows: 100 parts of magnesium oxide, 45 parts of magnesium sulfate heptahydrate, 5 parts of silica fume, 15 parts of fly ash, 0.5 part of silica sol, 1 part of sodium silicate, 1.5 parts of citric acid, 0.1 part of nano cellulose, 5 parts of wollastonite powder, 5 parts of fiber and 40 parts of water.
Magnesium sulfate heptahydrate was added to the remaining water, heated to 35 ℃, stirred to dissolve to obtain an aqueous sodium sulfate solution. Adding the nano-cellulose into a sodium sulfate aqueous solution and uniformly stirring; adding silica sol, citric acid and sodium silicate, continuously stirring uniformly, adding magnesium oxide, silica fume, fly ash and wollastonite powder, continuously stirring uniformly, adding fiber, and stirring uniformly to obtain inorganic adhesive slurry.
Pouring the inorganic glue slurry into a 40X 160mm test mould, placing the test mould in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering a preservative film on the surface of the test mould, removing the mould after one day, placing the test mould in a maintenance box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for maintenance to a specified age, and testing the self breaking strength and the compressive strength of the inorganic glue respectively.
The performance of the inorganic adhesive is as follows: the breaking strength is 9MPa after 7 days; compressive strength of 58MPa for 7 days; the rupture strength of the steel plate is 19.0MPa after 28 days; the 28-day compressive strength is 100.0MPa, and the softening coefficient is 0.98.
The volume ratio of wood chips to inorganic glue was 2.0.
The wood chips are impregnated layer by layer, and are soaked into inorganic glue slurry to ensure that the wood chips are uniformly impregnated, and then the wood chips are loaded into a mould and are pressed and formed under the pressure of 2.0 MPa. Then placing the wood in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering the surface with a preservative film, removing the mold after one day, placing the wood in a curing box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for curing to a specified age, and respectively testing the flexural strength and the compressive strength of the inorganic glue composite wood.
The inorganic adhesive composite wood maintained for 28 days is respectively subjected to performance tests such as tensile test, compression test, bending test and the like.
The inorganic adhesive composite wood has a 28-day grain compressive strength of 68MPa, a 28-day grain tensile strength of 42MPa and a 28-day bending strength of 80 MPa.
The fire resistance test of the inorganic adhesive composite wood which is maintained for 28 days shows that the inorganic adhesive composite wood which is obtained in the embodiment and is not subjected to any fire protection treatment has the grade of A, and the fire resistance limits of the column, the beam and the floor slab prepared by the composite material can reach more than 2.5h, 2h and 1h respectively.
Example 2
The raw materials are selected as follows:
magnesium oxide: light burned magnesium oxide, activity 50.
Magnesium sulfate heptahydrate: industrial grade, effective content 92%.
Silica fume: amorphous SiO 2 Content is 90%, and granularity is 50-200 nm.
Fly ash: second, the activity index is 85%.
Silica sol: particle size of 10-20nm, liquid, concentration 40%.
Sodium silicate: liquid, modulus 2.6.
Citric acid: purity 98% and powder.
Nano-cellulose: the pulp is prepared, the diameter is 8-15nm, the length is 200-300nm, and the pulp is liquid.
Wollastonite powder: available Ca 3 (Si 3 O 9 ) 75 percent of the content and 10 to 30 mu m of particle diameter.
Water: clean tap water.
The wood chips are fast-growing poplar wood chips.
The weight portions of the raw materials are as follows: 100 parts of magnesium oxide, 40 parts of magnesium sulfate heptahydrate, 1 part of silica fume, 30 parts of fly ash, 0.1 part of silica sol, 0.5 part of sodium silicate, 0.2 part of citric acid, 0.05 part of nano-cellulose, 2 parts of wollastonite powder and 45 parts of water.
Magnesium sulfate heptahydrate was added to water, heated to 35 ℃, stirred to dissolve to obtain an aqueous sodium sulfate solution. Adding the nano-cellulose into a sodium sulfate aqueous solution and uniformly stirring; adding the nano-cellulose into a sodium sulfate aqueous solution and uniformly stirring; adding silica sol, citric acid and sodium silicate, continuously stirring uniformly, adding magnesium oxide, silica fume, fly ash and wollastonite powder, and continuously stirring uniformly to obtain inorganic adhesive slurry.
Pouring the inorganic glue slurry into a 40X 160mm test mould, placing the test mould in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering a preservative film on the surface of the test mould, removing the mould after one day, placing the test mould in a maintenance box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for maintenance to a specified age, and testing the self breaking strength and the compressive strength of the inorganic glue respectively.
The performance of the inorganic adhesive is as follows: the breaking strength is 7.5MPa after 7 days; compressive strength of 50MPa for 7 days; the rupture strength of the steel plate is 14.5MPa after 28 days; the 28-day compressive strength is 80MPa, and the softening coefficient is 0.90.
The volume ratio of wood chips to inorganic glue was 1.6.
And impregnating the wood chips layer by layer, soaking the wood chips into inorganic glue slurry to ensure that the wood chips are uniformly impregnated, then loading the wood chips into a mould, and performing compression molding by using the pressure of 1 MPa. Then placing the wood in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering the surface with a preservative film, removing the mold after one day, placing the wood in a curing box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for curing to a specified age, and respectively testing the flexural strength and the compressive strength of the inorganic glue composite wood.
The inorganic adhesive composite wood maintained for 28 days is respectively subjected to performance tests such as tensile test, compression test, bending test and the like.
The inorganic adhesive composite wood has 28-day-grain compressive strength of 42MPa, 28-day-grain tensile strength of 33MPa and 28-day bending strength of 58 MPa.
The fire resistance test of the inorganic adhesive composite wood which is maintained for 28 days shows that the inorganic adhesive composite wood which is obtained in the embodiment and is not subjected to any fire protection treatment has the combustion performance grade of B1, and the fire resistance limits of the column, the beam and the floor slab prepared by the composite material can reach more than 2h, 1.5h and 1h respectively.
Example 3
The raw materials are selected as follows:
magnesium oxide: light burned magnesium oxide, active 56.
Magnesium sulfate heptahydrate: industrial grade, 95% of effective content.
Silica fume: amorphous SiO 2 95 percent of the content and 40-200nm of granularity.
Fly ash: first order, activity index 90%.
Silica sol: particle size of 10-20nm, liquid, concentration 40%.
Sodium silicate: liquid, modulus 2.6.
Citric acid: purity 98% and powder.
Nano-cellulose: the pulp is prepared, the diameter is 8-15nm, the length is 200-300nm, and the pulp is liquid.
Fiber: the organic synthetic fiber has a length of 16-20mm and a diameter of 20-25 μm.
Water: clean tap water.
The wood chips are fast-growing poplar wood chips.
The weight portions of the raw materials are as follows: 100 parts of magnesium oxide, 45 parts of magnesium sulfate heptahydrate, 5 parts of silica fume, 15 parts of fly ash, 0.5 part of silica sol, 1 part of sodium silicate, 1 part of citric acid, 0.1 part of nano-cellulose, 5 parts of fiber and 42 parts of water.
Magnesium sulfate heptahydrate was added to water, heated to 35 ℃, stirred to dissolve to obtain an aqueous sodium sulfate solution. Adding the nano-cellulose into a sodium sulfate aqueous solution and uniformly stirring; adding silica sol, citric acid, lithium silicate and sodium silicate, continuously stirring uniformly, adding magnesium oxide, silica fume and fly ash, continuously stirring uniformly, adding fiber, and stirring uniformly to obtain inorganic adhesive slurry.
Pouring the inorganic glue slurry into a 40X 160mm test mould, placing the test mould in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering a preservative film on the surface of the test mould, removing the mould after one day, placing the test mould in a maintenance box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for maintenance to a specified age, and testing the self breaking strength and the compressive strength of the inorganic glue respectively.
The performance of the inorganic adhesive is as follows: the rupture strength of 7 days is 8.5 MPa; compressive strength of 55MPa for 7 days; the rupture strength of the steel plate is 17.5MPa after 28 days; the 28-day compressive strength is 90MPa, and the softening coefficient is 0.97.
The volume ratio of the wood chips to the inorganic glue was 1.3.
And impregnating the wood chips layer by layer, soaking the wood chips into inorganic glue slurry to ensure that the wood chips are uniformly impregnated, then loading the wood chips into a mould, and performing compression molding with the strength of 2.0 MPa. Then placing the wood in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering the surface with a preservative film, removing the mold after one day, placing the wood in a curing box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for curing to a specified age, and respectively testing the flexural strength and the compressive strength of the inorganic glue composite wood.
The inorganic adhesive composite wood maintained for 28 days is respectively subjected to performance tests such as tensile test, compression test, bending test and the like.
The inorganic adhesive composite wood has a 28-day grain-oriented compressive strength of 62MPa, a 28-day grain-oriented tensile strength of 38MPa and a 28-day bending strength of 76 MPa.
The fire resistance test of the inorganic adhesive composite wood which is maintained for 28 days shows that the inorganic adhesive composite wood which is obtained in the embodiment and is not subjected to any fire protection treatment has the combustion performance grade of B1, and the fire resistance limits of the column, the beam and the floor slab prepared by the composite material can reach more than 2h, 1h and 0.5h respectively.
Example 4
The raw materials are selected as follows:
magnesium oxide: light burned magnesium oxide, active 56.
Magnesium sulfate heptahydrate: industrial grade, 95% effective content.
Silica fume: amorphous SiO 2 95 percent of the content and 40-200nm of granularity.
Fly ash: first order, activity index 90%.
Silica sol: particle size of 10-20nm, liquid, concentration 40%.
Sodium silicate: liquid, modulus 2.6.
Citric acid: purity 98% and powder.
Nano-cellulose: the pulp is prepared, the diameter is 8-15nm, the length is 200-300nm, and the pulp is liquid.
Water: clean tap water.
The wood chips are fast-growing poplar wood chips.
The weight parts of the raw materials are as follows: 100 parts of magnesium oxide, 45 parts of magnesium sulfate heptahydrate, 5 parts of silica fume, 15 parts of fly ash, 0.5 part of silica sol, 1 part of sodium silicate, 1 part of citric acid, 0.1 part of nano-cellulose and 42 parts of water.
Magnesium sulfate heptahydrate was added to water, heated to 35 ℃, stirred to dissolve to obtain an aqueous sodium sulfate solution. Adding the nano-cellulose into a sodium sulfate aqueous solution and uniformly stirring; adding silica sol, citric acid and sodium silicate, continuously stirring uniformly, adding magnesium oxide, silica fume and fly ash, and continuously stirring uniformly to obtain inorganic adhesive slurry.
Pouring the inorganic glue slurry into a 40X 160mm test mould, placing the test mould in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering a preservative film on the surface of the test mould, removing the mould after one day, placing the test mould in a maintenance box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for maintenance to a specified age, and testing the self breaking strength and the compressive strength of the inorganic glue respectively.
The performance of the inorganic adhesive is as follows: the breaking strength of 7 days is 8.0 MPa; compressive strength 53MPa for 7 days; the flexural strength of 28 days is 15.0 MPa; the 28-day compressive strength is 89MPa, and the softening coefficient is 0.96.
The volume ratio of the wood chips to the inorganic glue was 1.3.
And impregnating the wood chips layer by layer, soaking the wood chips into inorganic glue slurry to ensure that the wood chips are uniformly impregnated, then loading the wood chips into a mould, and performing compression molding by using the pressure of 2.0 MPa. Then placing the wood in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering the surface with a preservative film, removing the mold after one day, placing the wood in a curing box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for curing to a specified age, and respectively testing the flexural strength and the compressive strength of the inorganic glue composite wood.
The inorganic adhesive composite wood maintained for 28 days is respectively subjected to performance tests such as tensile test, compression test, bending test and the like.
The inorganic adhesive composite wood has 28-day-grain compressive strength of 60MPa, 28-day-grain tensile strength of 34MPa and 28-day bending strength of 60 MPa.
The fire resistance test of the inorganic adhesive composite wood which is maintained for 28 days shows that the inorganic adhesive composite wood which is obtained in the embodiment and is not subjected to any fire protection treatment has the combustion performance grade of B1, and the fire resistance limits of the column, the beam and the floor slab prepared by the composite material can reach more than 2h, 1h and 0.5h respectively.
Example 5
The raw materials are selected as follows:
magnesium oxide: light burned magnesium oxide, active 56.
Magnesium sulfate heptahydrate: industrial grade, 95% effective content.
Silica fume: amorphous SiO 2 95 percent of the content and 40-200nm of granularity.
Fly ash: first order, activity index 90%.
Silica sol: particle size of 10-20nm, liquid, concentration 40%.
Sodium silicate: liquid, modulus 2.6.
Citric acid: purity 98%, powder.
Nano-cellulose: the pulp is prepared, the diameter is 8-15nm, the length is 200-300nm, and the pulp is liquid.
Wollastonite powder: available Ca 3 (Si 3 O 9 ) Content is 80%, and particle diameter is 10-30 μm.
Fiber: the organic synthetic fiber has a length of 16-20mm and a diameter of 20-25 μm.
Water: clean tap water.
The wood chips are fast-growing poplar wood chips.
The weight portions of the raw materials are as follows: 100 parts of magnesium oxide, 45 parts of magnesium sulfate heptahydrate, 5 parts of silica fume, 15 parts of fly ash, 0.5 part of silica sol, 1 part of sodium silicate, 1 part of citric acid, 0.1 part of nano cellulose, 5 parts of wollastonite powder, 5 parts of fiber and 42 parts of water.
Magnesium sulfate heptahydrate was added to water, heated to 35 ℃, stirred to dissolve to obtain an aqueous sodium sulfate solution. Adding the nano-cellulose into a sodium sulfate aqueous solution and uniformly stirring; adding silica sol, citric acid and sodium silicate, continuously stirring uniformly, adding magnesium oxide, silica fume, fly ash and wollastonite powder, continuously stirring uniformly, adding fiber, and stirring uniformly to obtain inorganic adhesive slurry.
Pouring the inorganic glue slurry into a 40X 160mm test mould, placing the test mould in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering a preservative film on the surface of the test mould, removing the mould after one day, placing the test mould in a maintenance box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for maintenance to a specified age, and testing the self breaking strength and the compressive strength of the inorganic glue respectively.
The performance of the inorganic adhesive is as follows: the breaking strength of 7 days is 8.5 MPa; compressive strength of 55MPa for 7 days; the rupture strength of the steel plate is 17.5MPa after 28 days; the 28-day compressive strength is 89MPa, and the softening coefficient is 0.97.
The volume ratio of the wood chips to the inorganic glue is 1.5.
And impregnating the wood chips layer by layer, soaking the wood chips into inorganic glue slurry to ensure that the wood chips are uniformly impregnated, then loading the wood chips into a mould, and performing compression molding by using the pressure of 1.5 MPa. Then placing the wood in an environment with the room temperature of 20 +/-5 ℃ and the humidity of 70 +/-5%, covering a preservative film on the surface, removing the mold after one day, placing the wood in a curing box with the temperature of 20 +/-2 ℃ and the humidity of 65 +/-5% for curing to a specified age, and respectively testing the flexural strength and the compressive strength of the inorganic adhesive composite wood.
The inorganic adhesive composite wood maintained for 28 days is respectively subjected to performance tests such as tensile test, compression test, bending test and the like.
The inorganic adhesive composite wood has 28-day-grain compressive strength of 63MPa, 28-day-grain tensile strength of 37MPa and 28-day bending strength of 75 MPa.
The fire resistance test of the inorganic adhesive composite wood which is maintained for 28 days shows that the inorganic adhesive composite wood which is obtained in the embodiment and is not subjected to any fire protection treatment has the combustion performance grade of B1, and the fire resistance limits of the column, the beam and the floor slab prepared by the composite material can respectively reach more than 2.5h, 1.5h and 1 h.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A structural inorganic glue composite wood comprises wood chips and inorganic glue; the volume ratio of the wood chips to the inorganic glue is 2.8-1.1; the wood chips are obtained by processing fast-growing trees in the fast-growing forest;
the inorganic adhesive comprises the following raw materials in percentage by mass: 100 parts of magnesium oxide, 20-60 parts of magnesium sulfate heptahydrate, 1-10 parts of silica fume, 0.5-30 parts of fly ash, 0.1-3 parts of silica sol, 0.5-3 parts of sodium silicate, 0.2-3 parts of citric acid, 0.05-2 parts of nano cellulose, 0-10 parts of wollastonite powder, 0-1 part of fiber and 40-80 parts of water.
2. The structural inorganic adhesive composite wood according to claim 1, wherein the magnesium oxide is light-burned magnesium oxide, and the activity of the magnesium oxide is not less than 50;
or the effective content of the magnesium sulfate heptahydrate is not lower than 90 percent;
or the granularity of the silica fume is 50-260 nm;
or the granularity of the silica sol is 7-25 nm;
or the modulus of the lithium silicate is 2.0-3.0;
or the modulus of the sodium silicate is 1.5-3.0;
or the purity of the citric acid is not lower than 95 percent;
or the diameter of the nano-cellulose is 5-20 nm, and the length is 100-600 nm.
3. The structural inorganic adhesive composite wood according to claim 1, wherein the activity index of the fly ash is not less than 80%;
or the content of the effective components of the wollastonite powder is not less than 60 percent, and the particle size is 10-40 mu m;
or the length of the fiber is 16-22 mm, and the diameter of the fiber is 20-26 μm.
4. The structural inorganic adhesive composite wood according to claim 1, wherein the structural inorganic adhesive composite wood comprises 100 parts of magnesium oxide, 30 to 50 parts of magnesium sulfate heptahydrate, 1 to 6 parts of silica fume, 10 to 30 parts of fly ash, 0.1 to 1 part of silica sol, 0.5 to 1 part of sodium silicate, 0.2 to 2 parts of citric acid, 0.05 to 1 part of nanocellulose, 2 to 8 parts of wollastonite powder, 0.3 to 8 parts of fiber and 40 to 80 parts of water;
or 100 parts of magnesium oxide, 40-50 parts of magnesium sulfate heptahydrate, 1-6 parts of silica fume, 14-30 parts of fly ash, 0.1-0.5 part of silica sol, 0.8-1 part of sodium silicate, 0.2-1.5 parts of citric acid, 0.05-0.5 part of nano cellulose, 3-7 parts of wollastonite powder, 3-7 parts of fiber and 40-60 parts of water;
or 100 parts of magnesium oxide, 42-48 parts of magnesium sulfate heptahydrate, 4-6 parts of silica fume, 14-16 parts of fly ash, 0.5-0.6 part of silica sol, 0.9-1 part of sodium silicate, 1.4-1.5 parts of citric acid, 0.08-0.12 part of nano cellulose, 4-6 parts of wollastonite powder, 4-6 parts of fiber and 40-50 parts of water.
5. The structural inorganic adhesive composite lumber according to claim 1, wherein the fast-growing trees of the fast-growing forest are fast-growing poplar, fast-growing eucalyptus, hong senhua, fast-growing phoenix tree, fast-growing cedar, fast-growing catalpa tree, fast-growing willow or fast-growing white wax.
6. The structural inorganic adhesive composite lumber according to claim 1, wherein when the fast-growing wood of the fast-growing forest is a fast-growing poplar, the volume ratio of the wood chips to the inorganic adhesive is: 2.5 to 1.3;
when the fast-growing trees of the fast-growing forest are fast-growing eucalyptus, the volume ratio of the wood chips to the inorganic glue is as follows: 2.2 to 1.2;
when the fast-growing trees of the fast-growing forest are Hongsenhuai, the proportion of the wood chips and the inorganic glue is as follows: 2.8 to 1.7;
when the fast-growing trees of the fast-growing forest are fast-growing fago, the proportion of the wood chips to the inorganic glue is as follows: 2 to 1.1;
when the fast-growing trees of the fast-growing forest are fast-growing catalpa bungei, the ratio of the wood chips to the inorganic glue is as follows: 2.7 to 1.6;
when the fast-growing trees of the fast-growing forest are fast-growing willows, the proportion of the wood chips to the inorganic glue is as follows: 2.75 to 1.65;
when the fast-growing trees of the fast-growing forest are fast-growing white wax, the ratio of the wood chips to the inorganic glue is as follows: 2.6 to 1.5.
7. A method for preparing the structural inorganic adhesive composite wood according to any one of claims 1 to 6, which comprises:
mixing the raw materials according to the inorganic adhesive proportion to form inorganic adhesive slurry;
and adding the inorganic adhesive slurry and the wood chips into a mold, pressing and molding, and maintaining to obtain the wood-plastic composite board.
8. The method for preparing the inorganic cement composite wood for structure as claimed in claim 7, wherein the inorganic cement paste is prepared by the steps of: adding magnesium sulfate heptahydrate into water to dissolve the magnesium sulfate heptahydrate into a magnesium sulfate aqueous solution, adding nano-cellulose into the magnesium sulfate aqueous solution, uniformly stirring, adding silica sol, citric acid and sodium silicate, continuously uniformly stirring, then adding magnesium oxide, silica fume and wollastonite powder, continuously uniformly stirring, finally adding fibers, and uniformly stirring;
preferably, the temperature for preparing the magnesium sulfate aqueous solution is 30-40 ℃;
preferably, when the sodium silicate is solid, the sodium silicate is added in the form of solution after being added with water to prepare solution; further preferably, in the process of preparing the solid sodium silicate into the solution, the mass ratio of the sodium silicate to the water is 1: 2-3, and further preferably, the stirring time for preparing the solution is 1-2 minutes.
9. The method for preparing inorganic cement composite wood for structures as claimed in claim 7, wherein the wood chips are dipped in the inorganic cement paste to be uniform, and then put into the mold for pressing; the pressing pressure is 0.5-5 MPa.
10. Use of the inorganic adhesive composite wood for construction according to any one of claims 1 to 7 in building construction;
preferably in the preparation of building columns, beams and/or floors.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107473614A (en) * | 2017-09-27 | 2017-12-15 | 江苏蓝圈新材料股份有限公司 | A kind of anti-folding magnesium oxysulfide inorganic coagulation material of water-fast height |
| CN108237602A (en) * | 2017-01-19 | 2018-07-03 | 浙江农林大学 | Inorganic glue plywood and its production method |
| CN109159226A (en) * | 2018-09-13 | 2019-01-08 | 中南林业科技大学 | A kind of method of inorganic coagulation material strengthened artificial forest timber |
| CN111303775A (en) * | 2020-03-30 | 2020-06-19 | 山东建筑大学 | Anti-cracking inorganic adhesive for bamboo and wood structure and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237602A (en) * | 2017-01-19 | 2018-07-03 | 浙江农林大学 | Inorganic glue plywood and its production method |
| CN107473614A (en) * | 2017-09-27 | 2017-12-15 | 江苏蓝圈新材料股份有限公司 | A kind of anti-folding magnesium oxysulfide inorganic coagulation material of water-fast height |
| CN109159226A (en) * | 2018-09-13 | 2019-01-08 | 中南林业科技大学 | A kind of method of inorganic coagulation material strengthened artificial forest timber |
| CN111303775A (en) * | 2020-03-30 | 2020-06-19 | 山东建筑大学 | Anti-cracking inorganic adhesive for bamboo and wood structure and preparation method thereof |
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