CN114380552A - Fire-resistant assembly type integrated composite concrete wallboard and preparation method thereof - Google Patents
Fire-resistant assembly type integrated composite concrete wallboard and preparation method thereof Download PDFInfo
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- CN114380552A CN114380552A CN202111634959.7A CN202111634959A CN114380552A CN 114380552 A CN114380552 A CN 114380552A CN 202111634959 A CN202111634959 A CN 202111634959A CN 114380552 A CN114380552 A CN 114380552A
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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
- C04B2111/20—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
- C04B2201/30—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
- 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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- 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
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Abstract
The invention discloses a fire-resistant assembly type integrated composite concrete wallboard and a preparation method thereof, relating to the field of building materials, wherein fly ash is pretreated, wood pulp fiber is subjected to pulping and jordaning to obtain a first slurry, then fluorocarbon emulsion containing nano inorganic particles and polymer microspheres is added into the first slurry, dendritic polyether is continuously added and mixed uniformly to obtain a second slurry, porcelain clay tailings, carbide slag and pretreated fly ash are added into the second slurry, and the mixture is mixed uniformly to obtain a third slurry; and pouring the third slurry into a mold containing a steel wire mesh framework for molding, maintaining and demolding to obtain the steel wire mesh composite material. The concrete wallboard disclosed by the invention has excellent mechanical strength, low water absorption and heat conductivity coefficient, and the fire resistance of the concrete wallboard is improved to a certain extent.
Description
Technical Field
The invention relates to the field of building materials, in particular to a fire-resistant fabricated integrated composite concrete wallboard and a preparation method thereof.
Background
With the development of national economy and the improvement of the living standard of substances, the requirements of people on living conditions and the use function of house buildings are higher and higher, and the traditional wall plate which takes clay as a main raw material and is formed by sintering is gradually eliminated because of the consumption of a large amount of land and coal. Instead, they are new wall materials, which are favored by people for their excellent properties of light weight, environmental protection, energy saving, heat preservation, fire resistance, sound insulation, etc. The composite concrete wallboard is a novel wall body mainly formed by compounding a heat insulating material and a traditional cavity material or a novel wall body material, but the material in the prior art has certain moisture absorption rate and poor mechanical strength.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art and provides a fire-resistant fabricated integrated composite concrete wallboard and a preparation method thereof.
The technical solution of the invention is as follows:
a fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 500 parts of 200-sand-containing porcelain clay tailings, 150 parts of 100-sand-containing carbide slag, 300 parts of 200-sand-containing fly ash, 350 parts of 200-sand-containing cement, 300 parts of 100-sand-containing wood pulp fiber, 250 parts of 200-sand-containing ceramsite, 50-100 parts of polyphenyl particles and 10-50 parts of hydrophobing agent;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether.
Preferably, the total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 1-10 wt% of the fluorocarbon emulsion.
Preferably, the nano inorganic particles are silica.
Preferably, the micro polymer particles are polybutadiene or polyisoprene.
Preferably, the mass ratio of the inorganic nanoparticles to the micro polymer particles to the dendritic polyether is 3-10: 1-3:5-20.
The invention also discloses a preparation method of the fire-resistant assembly type integrated composite concrete wallboard, which is characterized by comprising the following steps of:
the method comprises the following steps: firstly, the fly ash is pretreated,
step two: pulping and grinding wood pulp fibers to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, uniformly mixing to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and uniformly mixing to obtain third pulp;
step three: and pouring the third slurry into a mold containing a steel wire mesh framework for molding, maintaining and demolding to obtain the wallboard with the thickness of 100-200 mm. More specifically, be provided with public female groove on the mould, and the cavity of walking the line in the middle of interlude, conveniently walk the line like this, public female groove can easy to assemble simultaneously.
Preferably, in the step one, the pretreatment is specifically to decarbonize the fly ash.
Preferably, the fly ash after the decarbonization treatment is further subjected to desulfurization treatment, specifically: adding the fly ash subjected to decarbonization treatment into alkali liquor for dipping reaction.
Preferably, the method further comprises a step four of carrying out surface decoration treatment on the surface of the wallboard to obtain the decoration integrated wallboard.
The invention has the beneficial effects that:
(1) according to the fire-resistant assembly type integrated composite concrete wallboard, through adding the fluorocarbon emulsion containing the nano inorganic particles, the micro polymer particles and the dendritic polyether, the nano inorganic particles can be attached to the surfaces of the micro polymer particles to form raspberry-shaped particles, then the core of the added dendritic polyether is combined with the inorganic particles to form a dendritic shape, the surface activity of the inorganic particles is reduced, the inorganic particles and the polymer particles can be combined more conveniently, the hydrophobic property is improved, the hydrophobic agent is attached to the surface of wood pulp fibers, and the water absorption of the wallboard can be effectively reduced; meanwhile, the micron-sized polymer particles have certain elasticity, so that microcracks caused by internal stress of concrete during curing and forming can be effectively prevented, and the mechanical strength is further enhanced.
(2) According to the preparation method of the fire-resistant assembly type integrated composite concrete wallboard, the fly ash contains large unburned carbon particles. The strength of larger carbon particles in the fly ash is poor, the fly ash cannot play a role of a material layer framework, and the carbon particles are loose and porous, so that the forming strength of the wallboard is influenced to a certain extent, therefore, large-particle-size unburned carbon particles in the fly ash need to be removed through carbon removal treatment, furthermore, because the fly ash contains certain sulfur trioxide, the sulfur trioxide is mixed with water to generate sulfurous acid, the sulfurous acid is further oxidized into sulfuric acid, and the sulfuric acid reacts with certain calcium salt easily, so that the coagulation strength of a cementing material in concrete can be influenced, and therefore, the desulfurization treatment is needed before the use.
Detailed Description
This section will describe in detail specific embodiments of the invention, which should not be construed as limiting the scope of the invention.
It should be noted that:
carbide slag: the available calcium (calcium hydroxide) content was 85 wt%; the cement is 32.5-grade ordinary portland cement.
The porcelain clay tailings comprise the following main components: SiO 22 81.01％，Al2O3 12.12％，Fe2O3 1.73％，TiO20.25％，CaO 0.01％，MgO 0.07％，K2O 0.45％，Na20.01 percent of O and 4.35 percent of ignition loss.
The fly ash comprises the following main components: SiO 22 53.37％，Al2O3 25.07％，Fe2O3 3.31％，TiO20.06％，CaO 1.52％，MgO 1.18％，K2O 2％，Na2O 0.24％，SO31.57% and a loss on ignition of 11.64%.
The polystyrene particles are expanded polystyrene foam particles.
In the following examples, fatty alcohol-polyoxyethylene ether was used as the dendritic polyether.
Example 1
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 270 parts of porcelain clay tailings, 140 parts of carbide slag, 270 parts of fly ash, 350 parts of cement, 100 parts of wood pulp fiber, 210 parts of ceramsite, 70 parts of polyphenyl granules, 40 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 4 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polybutadiene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 3: 1:17.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash. The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: adding water into wood pulp fiber, pulping, grinding to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, mixing uniformly to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and mixing uniformly to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
Example 2
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 300 parts of porcelain clay tailings, 120 parts of carbide slag, 280 parts of fly ash, 350 parts of cement, 190 parts of wood pulp fiber, 210 parts of ceramsite, 55 parts of polyphenyl particles, 18 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 4 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polyisoprene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 3: 2:19.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash. The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: adding water into wood pulp fiber, pulping, grinding to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, mixing uniformly to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and mixing uniformly to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
Example 3
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 400 parts of porcelain clay tailings, 120 parts of carbide slag, 260 parts of fly ash, 280 parts of cement, 200 parts of wood pulp fiber, 240 parts of ceramsite, 50 parts of polyphenyl granules, 26 parts of a hydrophobizing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 5 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polyisoprene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 7: 3:20.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash. The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: adding water into wood pulp fiber, pulping, grinding to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, mixing uniformly to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and mixing uniformly to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
Example 4
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 300 parts of porcelain clay tailings, 120 parts of carbide slag, 270 parts of fly ash, 320 parts of cement, 210 parts of wood pulp fiber, 220 parts of ceramsite, 60 parts of polyphenyl granules, 40 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 8 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polybutadiene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 10: 3:20.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash.
The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: adding water into wood pulp fiber, pulping, grinding to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, mixing uniformly to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and mixing uniformly to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
Preferably, in the step one, the pretreatment is specifically to decarbonize the fly ash.
Preferably, the fly ash after the decarbonization treatment is further subjected to desulfurization treatment, specifically: adding the fly ash subjected to decarbonization treatment into alkali liquor for dipping reaction.
Example 5
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 400 parts of porcelain clay tailings, 150 parts of carbide slag, 300 parts of fly ash, 350 parts of cement, 300 parts of wood pulp fiber, 250 parts of ceramsite, 70 parts of polyphenyl granules, 30 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 10 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polybutadiene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 7: 2:13.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash.
The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: adding water into wood pulp fibers, pulping, grinding to obtain first slurry, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first slurry, continuously adding dendritic polyether, mixing uniformly to obtain second slurry, adding porcelain clay tailings, carbide slag cement, ceramsite, polyphenyl granules and pretreated fly ash into the second slurry, and mixing uniformly to obtain third slurry;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
And step four, carrying out surface decoration treatment on the surface of the wallboard to obtain the decoration integrated wallboard. In particular, the method can be carried out by adopting a UHPC treatment mode, namely, grinding, polishing, chiseling and sand blasting are carried out by adopting a machine.
Comparative example 1 (hydrophobing agent is fluorocarbon emulsion only)
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 300 parts of porcelain clay tailings, 150 parts of carbide slag, 280 parts of fly ash, 140 parts of cement, 130 parts of wood pulp fiber, 220 parts of ceramsite, 70 parts of polyphenyl granules, 26 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash.
The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: adding water into wood pulp fiber for pulping and pulping to obtain first pulp, then adding fluorocarbon emulsion into the first pulp to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and uniformly mixing to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
Comparative example 2 (non-dendritic polyether)
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 300 parts of porcelain clay tailings, 150 parts of carbide slag, 280 parts of fly ash, 140 parts of cement, 130 parts of wood pulp fiber, 220 parts of ceramsite, 70 parts of polyphenyl granules, 26 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles and micro polymer particles. The addition amount of the nano inorganic particles and the micro polymer particles accounts for 10 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polybutadiene.
The mass ratio of the inorganic nanoparticles to the micro polymer particles is 7: 2.
the preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash.
The fly ash after the decarbonization treatment is also subjected to desulfurization treatment, which specifically comprises the following steps: adding the fly ash subjected to the decarbonization treatment into a calcium hydroxide solution with the concentration of 10 wt% for soaking reaction for 20 min.
Step two: pulping and grinding wood pulp fibers to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, uniformly mixing to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and uniformly mixing to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
Comparative example 3 (No decarbonization treatment)
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 300 parts of porcelain clay tailings, 150 parts of carbide slag, 280 parts of fly ash, 140 parts of cement, 130 parts of wood pulp fiber, 220 parts of ceramsite, 70 parts of polyphenyl granules, 26 parts of hydrophobing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The total adding amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 10 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polybutadiene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 7: 2:13.
The preparation method comprises the following steps:
the method comprises the following steps: firstly, pretreating the fly ash, specifically: adding the fly ash into a 10 wt% calcium hydroxide solution for soaking reaction for 20 min.
Step two: adding water into wood pulp fiber, pulping, grinding to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, mixing uniformly to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and mixing uniformly to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
COMPARATIVE EXAMPLE 4 (No desulfurization treatment)
A fire-resistant fabricated integrated composite concrete wallboard comprises the following raw materials in parts by weight: 300 parts of porcelain clay tailings, 150 parts of carbide slag, 280 parts of fly ash, 140 parts of cement, 130 parts of wood pulp fiber, 26 parts of a hydrophobizing agent and 1000 parts of water;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether. The addition amount of the nano inorganic particles, the micro polymer particles and the dendritic polyether accounts for 10 wt% of the fluorocarbon emulsion.
The nano inorganic particles are silicon dioxide.
The micron polymer particles are polybutadiene.
The mass ratio of the nano inorganic particles to the micro polymer particles to the dendritic polyether is 7: 2:13.
The preparation method comprises the following steps:
the method comprises the following steps: the method comprises the steps of pretreating the fly ash, specifically, decarbonizing the fly ash, specifically, adopting a belt type triboelectric separator, moving carbon particles to a negative electrode after triboelectric charging, and collecting the decarbonized fly ash.
Step two: adding water into wood pulp fiber, pulping, grinding to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, mixing uniformly to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and mixing uniformly to obtain third pulp;
step three: and pouring the third slurry into a mould containing a steel wire mesh framework for forming, maintaining and demoulding to obtain the wallboard with the thickness of 160 mm.
The above examples and comparative examples were subjected to performance tests, and the test results are shown in Table 1.
And (3) carrying out a water absorption test on the prepared sample by using GB/T12626.8-1990, and testing the flexural strength and the thermal conductivity of the sample by using JC/T412.2-2006.
TABLE 1 Performance test values of examples and comparative examples
| Test specimen | Water absorption (%) | Breaking strength (Mpa) | Thermal conductivity (W/(m.k)) |
| Example 1 | 11.5 | 39 | 0.11 |
| Example 2 | 11.3 | 38 | 0.12 |
| Example 3 | 11.4 | 40 | 0.10 |
| Example 4 | 11.5 | 41 | 0.11 |
| Example 5 | 11.1 | 39 | 0.12 |
| Comparative example 1 | 18.6 | 29 | 0.18 |
| Comparative example 2 | 18.9 | 34 | 0.16 |
| Comparative example 3 | 17.9 | 31 | 0.15 |
| Comparative example 4 | 13.6 | 32 | 0.14 |
As can be seen from the above table, the performance of the examples is superior to that of the comparative example, the main reason may be as follows, and the analysis of the comparative example 1 shows that, by adding the fluorocarbon emulsion containing the inorganic nanoparticles, the micro polymer particles and the dendritic polyether, the inorganic nanoparticles can be attached to the surfaces of the micro polymer particles to form raspberry-like particles, the nano silica has hydrophobicity, and the water repellent agent is attached to the surfaces of the wood pulp fibers, so that the water absorption of the wallboard can be effectively reduced; meanwhile, the micron-sized polymer particles have certain elasticity, so that microcracks caused by internal stress of concrete during curing and forming can be effectively prevented, and the mechanical strength is further enhanced. The analysis of comparative example 2 shows that the core of the dendritic polyether added in the example is combined with the inorganic particles to be dendritic, the surface activity of the inorganic particles is reduced, the inorganic particles are more favorably combined with the polymer particles, and the hydrophobic property is improved, and the analysis of comparative example 3 shows that the fly ash in the example contains large-particle unburned carbon particles. The larger carbon particles in the fly ash have poor strength and cannot play a role of a material layer skeleton, and the carbon particles are loose and porous and are not beneficial to the forming of a wallboard, so that the large-particle-size unburned carbon particles in the fly ash need to be removed through carbon removal treatment.
The above additional technical features can be freely combined and used in superposition by those skilled in the art without conflict.
The above description is only a preferred embodiment of the present invention, and the technical solutions that achieve the objects of the present invention by substantially the same means are within the protection scope of the present invention.
Claims (9)
1. A fire-resistant assembled integrated composite concrete wallboard is characterized by comprising the following raw materials in parts by weight: 500 parts of 200-sand-containing porcelain clay tailings, 150 parts of 100-sand-containing carbide slag, 300 parts of 200-sand-containing fly ash, 350 parts of 200-sand-containing cement, 300 parts of 100-sand-containing wood pulp fiber, 250 parts of 200-sand-containing ceramsite, 50-100 parts of polyphenyl particles and 10-50 parts of hydrophobing agent;
the hydrophobic agent is fluorocarbon emulsion containing nano inorganic particles, micro polymer particles and dendritic polyether.
2. The fire-resistant fabricated integral composite concrete wallboard of claim 1, wherein the total addition amount of the inorganic nanoparticles, the micro polymer particles and the dendritic polyether accounts for 1-10 wt% of the fluorocarbon emulsion.
3. The fire-resistant fabricated integral composite concrete wallboard of claim 1, wherein the nano inorganic particles are silica.
4. The fire-resistant fabricated integrated composite concrete wallboard of claim 1, wherein the micro polymer particles are polybutadiene or polyisoprene.
5. The fire-resistant fabricated integrated composite concrete wallboard according to claim 1, wherein the mass ratio of the nano inorganic particles, the micro polymer particles and the dendritic polyether is 3-10: 1-3:5-20.
6. The preparation method of the fire-resistant assembly type integrated composite concrete wallboard is characterized by comprising the following steps of:
the method comprises the following steps: firstly, the fly ash is pretreated,
step two: pulping and grinding wood pulp fibers to obtain first pulp, adding fluorocarbon emulsion containing nano inorganic particles and polymer microspheres into the first pulp, continuously adding dendritic polyether, uniformly mixing to obtain second pulp, adding porcelain clay tailings, carbide slag, cement, ceramsite, polyphenyl granules and pretreated fly ash into the second pulp, and uniformly mixing to obtain third pulp;
step three: and pouring the third slurry into a mold containing a steel wire mesh framework for molding, maintaining and demolding to obtain the wallboard with the thickness of 100-200 mm.
7. The preparation method of the fire-resistant fabricated integrated composite concrete wallboard according to claim 6, wherein in the first step, the pretreatment is specifically decarbonization treatment of the fly ash.
8. The preparation method of the fire-resistant fabricated integrated composite concrete wallboard according to claim 7, wherein the fly ash subjected to the decarbonization treatment is further subjected to desulfurization treatment, specifically comprising the following steps: adding the fly ash subjected to decarbonization treatment into alkali liquor for dipping reaction.
9. The preparation method of the fire-resistant fabricated integral composite concrete wallboard according to claim 6, characterized by further comprising a fourth step of performing surface decoration treatment on the surface of the wallboard to obtain a decoration integral wallboard.
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