CN111848043A - Flame-retardant cement-based capillary crystalline waterproof coating and preparation method thereof - Google Patents
Flame-retardant cement-based capillary crystalline waterproof coating and preparation method thereof Download PDFInfo
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- CN111848043A CN111848043A CN202010737769.7A CN202010737769A CN111848043A CN 111848043 A CN111848043 A CN 111848043A CN 202010737769 A CN202010737769 A CN 202010737769A CN 111848043 A CN111848043 A CN 111848043A
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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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
Abstract
The invention discloses a flame-retardant cement-based permeable crystallization waterproof coating which is prepared from the following raw materials in percentage by mass: 40-60% of Portland cement, 20-30% of quartz sand, 5-10% of phosphoric acid modified steel slag powder, 1-2% of graphene modified sodium silicate, 2.5-5% of desulfurized fly ash-slaked lime mixture, 1-5% of bentonite-citric acid-isobutyl triethoxysilane mixture, 5-10% of vinyl acetate-VAE rubber powder mixture and 0.5-1.5% of ethylenediamine tetraacetic acid-tartaric acid-silicone oil mixture; the total mass content of the raw materials is 100 percent. The flame-retardant cement-based capillary crystalline waterproof coating has good flame-retardant performance and low price; and solves the problems that the steel slag and the semidry desulphurization ash are difficult to utilize and have low added value.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a flame-retardant cement-based permeable crystallization waterproof coating and a preparation method thereof.
Background
With the continuous development of the engineering construction in China, the problem of water leakage of corresponding tunnels, underground engineering, houses and the like is endless, and the demand for waterproof materials is continuously increased. For example, in the field of tunnel construction, higher requirements are required for the flame retardant property of waterproof coatings. Also, for house construction, if the flame retardant property of the waterproof coating is good, the safety of the house is increased.
At present, the types of waterproof materials in China are complex, the waterproof technology is continuously updated, and common waterproof materials comprise waterproof coiled materials, waterproof coatings, sealing materials, plugging materials and the like. The cement-based capillary crystalline waterproof coating is a novel waterproof material, not only belongs to an inorganic waterproof coating system and a cement concrete system, has good compatibility, but also has excellent waterproof performance, and has the waterproof and anti-permeability effects of a polymer cement mortar waterproof coating with the thickness of 10-20 cm when coated by 1cm, and has a waterproof repairing function on concrete below the coating. At present, the coatings are imported and are expensive. If the coating can be made into a home as early as possible without depending on import and the product price is reduced, the coating is more commonly used in underground construction engineering, is extremely favorable for the development of the building field and has wide potential market prospect.
[ summary of the invention ]
The invention aims to provide the flame-retardant cement-based permeable crystallization waterproof coating which has good flame-retardant property and low price; and solves the problems that the steel slag and the semidry desulphurization ash are difficult to utilize and have low added value.
The invention adopts the following technical scheme: the flame-retardant cement-based permeable crystallization waterproof coating is prepared from the following raw materials in percentage by mass:
40 to 60 percent of Portland cement,
20 to 30 percent of quartz sand,
5 to 10 percent of phosphoric acid modified steel slag powder,
1 to 2 percent of graphene modified sodium silicate,
2.5 to 5 percent of mixture of desulfurized fly ash and slaked lime,
1 to 5 percent of bentonite-citric acid-isobutyl triethoxysilane mixture,
5 to 10 percent of vinyl acetate-VAE rubber powder mixture,
0.5 to 1.5 percent of ethylenediamine tetraacetic acid-tartaric acid-silicone oil mixture;
the total mass content of the raw materials is 100 percent.
Further, the specific surface area of the phosphoric acid modified steel slag powder is 400cm2/g～450cm2And/g, the mass ratio of phosphoric acid to the steel slag powder in the phosphoric acid modified steel slag powder is (2-4): 100.
Further, the specific surface area of the graphene modified sodium silicate is 2630m2(iv) in the graphene-modified sodium silicate, the graphene and silicic acidThe mass ratio of sodium is (1-3) 1000; the molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein n is any value of 2-3.
Furthermore, in the desulfurized fly ash-slaked lime, the mass ratio of the desulfurized fly ash to the slaked lime is 1 (3-5).
Further, the mass ratio of bentonite to citric acid to isobutyl triethoxysilane in the bentonite-citric acid-isobutyl triethoxysilane mixture is 100 (30-40): (5-10).
Furthermore, in the mixture of the vinyl acetate and the VAE rubber powder, the mass ratio of the vinyl acetate to the VAE rubber powder is (1-3): 10.
Further, in the mixture of ethylenediamine tetraacetic acid-tartaric acid-silicone oil, the mass ratio of ethylenediamine tetraacetic acid, tartaric acid and silicone oil is (1-3): 5: 10.
the invention also discloses a preparation method of the flame-retardant cement-based permeable crystallization waterproof coating, which comprises the following steps:
weighing the raw materials, and mixing and stirring the portland cement, quartz sand and phosphoric acid modified steel slag powder to obtain a mixture;
adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring to obtain a premix;
and adding a bentonite-citric acid-isobutyl triethoxysilane mixture, a vinyl acetate-VAE rubber powder mixture and an ethylene diamine tetraacetic acid-tartaric acid-silicone oil mixture into the premix, and stirring at room temperature to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
10. A core master batch for a flame-retardant cement-based permeable crystallization waterproof coating is characterized by being a mixture of bentonite, citric acid and isobutyl triethoxysilane, wherein the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100 (30-40): (5-10).
The invention has the beneficial effects that: 1. the flame-retardant cement-based permeable crystallization waterproof coating has good flame-retardant property and low price. 2. The flame-retardant cement-based permeable crystallization waterproof coating is prepared from the steel slag, the desulfurized fly ash and the bentonite, and the high-added-value resource utilization of the steel slag, the desulfurized fly ash and the montmorillonite is promoted.
Drawings
FIG. 1 is a schematic diagram of a flame retardant performance test;
wherein: 1. an iron stand; 2. a test board; 3. a support; 4. alcohol blowtorch; a. the fire-retardant cement-based infiltration crystallization waterproof coating.
Detailed Description
The invention discloses a flame-retardant cement-based permeable crystallization waterproof coating which is prepared from the following raw materials in percentage by mass:
40 to 60 percent of Portland cement,
20 to 30 percent of quartz sand,
5 to 10 percent of phosphoric acid modified steel slag powder,
1 to 2 percent of graphene modified sodium silicate,
2.5 to 5 percent of mixture of desulfurized fly ash and slaked lime,
1 to 5 percent of bentonite-citric acid-isobutyl triethoxysilane mixture,
5 to 10 percent of vinyl acetate-VAE rubber powder mixture,
0.5 to 1.5 percent of ethylenediamine tetraacetic acid-tartaric acid-silicone oil mixture;
the total mass content of the raw materials is 100 percent.
The specific surface area of the phosphoric acid modified steel slag powder is 400cm2/g～450cm2And/g, the mass ratio of phosphoric acid to the steel slag powder in the phosphoric acid modified steel slag powder is (2-4): 100.
The specific surface area of the graphene modified sodium silicate is 2630m2The graphene modified sodium silicate is characterized in that the mass ratio of graphene to sodium silicate is (1-3): 1000; the molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein n is any value of 2-3.
In the desulfurized fly ash-slaked lime, the mass ratio of the desulfurized fly ash to the slaked lime is 1 (3-5).
The mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane in the bentonite to citric acid to isobutyl triethoxysilane mixture is 100 (30-40): (5-10).
In the mixture of the vinyl acetate and the VAE rubber powder, the mass ratio of the vinyl acetate to the VAE rubber powder is (1-3): 10.
In the mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil, the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is (1-3): 5: 10.
the invention also discloses a preparation method of the flame-retardant cement-based permeable crystallization waterproof coating, which is characterized by comprising the following steps:
weighing the raw materials, and mixing and stirring the portland cement, quartz sand and phosphoric acid modified steel slag powder to obtain a mixture;
adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring to obtain a premix;
and adding a bentonite-citric acid-isobutyl triethoxysilane mixture, a vinyl acetate-VAE rubber powder mixture and an ethylene diamine tetraacetic acid-tartaric acid-silicone oil mixture into the premix, and stirring at room temperature to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
The core master batch for the flame-retardant cement-based permeable crystallization waterproof coating is a mixture of bentonite, citric acid and isobutyl triethoxysilane, and the mass ratio of the bentonite, the citric acid and the isobutyl triethoxysilane is 100 (30-40): (5-10).
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
In this example, the steel slag contains CaO and Fe as main components2O3、Al2O3、SiO2、MgO、P2O5、MnO、SO3And a small amount of free calcium oxide. Under the modification effect of phosphoric acid, on one hand, the phosphoric acid is utilized to remove f-CaO in the steel slag, which is beneficial to refining the steel slag, improving the specific surface area, increasing the pore volume and the pore diameter and improving the mechanical property; on the other hand, the phosphoric acid and CaO and Fe in the steel slag2O3、Al2O3、SiO2MgO forms a silicon-phosphorus-iron system, a silicon-phosphorus-magnesium system and a silicon-phosphorus-aluminum system, thereby improving the flame retardant effect. Quartz sand is used as filler.
Sodium silicate is used as an active substance, and a part of sodium silicate and calcium ions of the semi-dry desulfurization ash and the slaked lime in the calcium ion balancing agent are subjected to chemical reaction to produce insoluble crystals, so that the mechanical property is improved; citric acid and isobutyl triethoxy silane in the complexing agent and calcium ions of semi-dry desulfurized ash and slaked lime in the calcium ion balancing agent are subjected to a complexing reaction to generate a soluble complex, and the soluble complex and the other part of sodium silicate are subjected to an ion exchange reaction to generate an insoluble crystal, so that the anti-cracking performance is improved; and finally, reacting part of sodium silicate with vinyl acetate, VAE rubber powder, ethylene diamine tetraacetic acid, tartaric acid and silicone oil to produce a cross-linked reticular silica gel elastomer, so that the internal stress capability is improved.
Graphene, as one of the carbon materials, has an ultra-large specific surface area of 2630m2Perg, excellent light transmittance, light transmittance of 97.7%, super conductivity, and conductivity of 106S/m, super-strong heat conductivity, heat conductivity coefficient of 5000W/m.k, and super-strong hardness. The adhesive force capability, the cracking resistance and the internal stress capability of the sodium silicate can be improved by utilizing the ultra-large specific surface area and the ultra-strong hardness of the graphene.
In the invention, a mixture of bentonite, citric acid and isobutyl triethoxysilane is adopted, and the bentonite is rich in SiO2With Al2O3On one hand, the material can be continuously and uniformly hydrated with Portland cement to produce a substance with expansibility, and the effect of compensating shrinkage can be achieved; on the other hand, the adhesive participates in the cementation of the cementing material, and the compactness is improved, so that the mechanical property is improved; and simultaneously, the water-soluble polymer can perform secondary reaction with a hydration product of portland cement to produce hydrophobic crystalline substances to plug holes and seams, so that the compactness and the self-healing performance of the cracks are further improved.
Example 1
Taking 100g of the product prepared by the invention as an example, the product is prepared from the following raw materials by weight: 49.9g of portland cement, 28g of quartz sand, 5g of phosphoric acid modified steel slag powder, 1.6g of graphene modified sodium silicate, 3g of desulfurized fly ash to slaked lime, 3g of bentonite to citric acid to isobutyl triethoxysilane, 9g of vinyl acetate to VAE rubber powder and 0.5g of ethylene diamine tetraacetic acid to tartaric acid to silicone oil. Wherein, the bentonite-citric acid-isobutyl triethoxy silane is used as a core master batch.
The Portland cement is 42.5-grade Portland cement. The grain size of the quartz sand is in the range of 0.5 mm-3 mm. The phosphoric acid modified steel slag powder is used as a flame-retardant filler and is obtained by testing, and the specific surface area of the phosphoric acid modified steel slag powder is 400cm2/g～450cm2Within the range of/g, the mass ratio of phosphoric acid to steel slag powder is 4: 100. The graphene modified sodium silicate is prepared by mixing graphene and sodium silicate at a mass ratio of 1:1000, and the specific surface area of graphene is 2630m2A light transmittance of 97.7% and an electrical conductivity of 106S/m, thermal conductivity of 5000W/m.k, and molecular formula of sodium silicate of SiO2·nNa2O·H2O, wherein the value of n is 2.5.
The method comprises the following steps of selecting a mixture of semi-dry desulfurized fly ash and slaked lime as a calcium ion balancing agent, wherein the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1:5, and the semi-dry desulfurized fly ash comprises the following chemical components in percentage by mass: SO (SO)330.74％、CaO63.54％、MgO 0.56％、SiO21.67％、Al2O30.63％、TiO20.05％、K2O 0.36％、Na2O 0.12％、Cl0.95％、Fe2O30.83% and the other 0.55%, and the fineness is 400 meshes.
The bentonite-citric acid-isobutyl triethoxysilane mixture is a complexing agent, and the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:30: 10. The bentonite comprises the main chemical components and the mass content of each component is SiO260.64％、Al2O320.65％、Fe2O37.49％、FeO 0.43％、CaO 1.73％、MgO 5.74％、Na2O0.82％、K2O 0.56％、TiO20.98 percent and the other 0.96 percent, and the fineness is 400 meshes.
The mixture of the vinyl acetate and the VAE rubber powder is used as redispersible latex powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 1: 10. The mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil is a chelating agent, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 3:5: 10.
The preparation method of the flame-retardant cement-based permeable crystallization waterproof coating comprises the following steps: mixing the silicate cement, the quartz sand and the phosphoric acid modified steel slag powder, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 200r/min to obtain a mixture.
And adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the premix.
And adding a bentonite-citric acid-isobutyl triethoxy silicon mixture, a vinyl acetate-VAE rubber powder mixture and an ethylene diamine tetraacetic acid-tartaric acid-silicone oil mixture into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 200r/min to obtain the flame-retardant cement-based permeable crystalline waterproof coating.
Example 2
The differences between this example and example 1 are listed below, and the non-listed contents are the same.
Taking 100g of the product prepared by the invention as an example, the product is prepared from the following raw materials by weight: 48g of portland cement, 30g of quartz sand as a filler, 8g of phosphoric acid modified steel slag powder, 1g of graphene modified sodium silicate, 3.5g of desulfurized fly ash to slaked lime, 1g of a mixture of bentonite, citric acid and isobutyl triethoxysilane, 7g of vinyl acetate and VAE rubber powder, and 1.5g of ethylenediamine tetraacetic acid, tartaric acid and silicone oil.
The phosphoric acid modified steel slag powder is a flame-retardant filler, and the mass ratio of the phosphoric acid to the steel slag powder is 2: 100.
In the graphene modified sodium silicate, the mass ratio of graphene to sodium silicate is 2: 1000. The molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein the value of n is 3.
The method comprises the following steps of selecting a mixture of semi-dry desulfurized fly ash and slaked lime, wherein the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1: 3.
The bentonite-citric acid-isobutyl triethoxysilane mixture is a complexing agent, and the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:40: 5.
In the mixture of the vinyl acetate and the VAE rubber powder, the mass ratio of the vinyl acetate to the VAE rubber powder is 2: 10. The mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil is a chelating agent, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 1:5: 10.
The preparation method of the flame-retardant cement-based permeable crystallization waterproof coating comprises the following steps: mixing the silicate cement, the quartz sand and the phosphoric acid modified steel slag powder, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 100r/min to obtain a mixture.
And adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 200r/min to obtain the premix.
And adding a bentonite-citric acid-isobutyl triethoxy silicon mixture and a vinyl acetate-VAE rubber powder mixture into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 400r/min to obtain the flame-retardant cement-based permeable crystalline waterproof coating.
Example 3
The differences between this example and example 1 are listed below, and the non-listed contents are the same.
Taking 100g of the product of the invention as an example, the product is prepared from the following raw materials by weight: 53.3g of Portland cement, 20g of quartz sand filler, 9g of phosphoric acid modified steel slag powder, 1.4g of graphene modified sodium silicate, 5g of desulfurized fly ash to slaked lime, 4g of bentonite-citric acid-isobutyl triethoxysilane mixture, 6g of vinyl acetate-VAE rubber powder and 1g of ethylene diamine tetraacetic acid-tartaric acid-silicone oil.
In the phosphoric acid modified steel slag powder, the mass ratio of phosphoric acid to steel slag powder is 3: 100. In the graphene modified sodium silicate, the mass ratio of graphene to sodium silicate is 3: 1000. The molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein the value of n is 2.
In the mixture of semi-dry desulfurized fly ash and slaked lime, the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1: 4.
The bentonite-citric acid-isobutyl triethoxysilane mixture is a complexing agent, and the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:30: 5. The mixture of the vinyl acetate and the VAE rubber powder is used as redispersible latex powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 3: 10. The mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil is a chelating agent, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 2:5: 10.
The preparation method of the flame-retardant cement-based permeable crystallization waterproof coating comprises the following steps: mixing the silicate cement, the quartz sand and the phosphoric acid modified steel slag powder, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 150r/min to obtain a mixture.
And adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 400r/min to obtain the premix.
And adding a bentonite-citric acid-isobutyl triethoxy silicon mixture and a vinyl acetate-VAE rubber powder mixture into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystalline waterproof coating.
Example 4
The differences between this example and example 1 are listed below, and the non-listed contents are the same.
Taking 100g of the product prepared by the invention as an example, the product is prepared from the following raw materials by weight: 40g of portland cement, 27.5g of quartz sand, 10g of phosphoric acid modified steel slag powder, 2g of graphene modified sodium silicate, 4g of desulfurized fly ash to slaked lime, 5g of bentonite-citric acid-isobutyl triethoxysilane mixture, 10g of vinyl acetate-VAE rubber powder and 1.5g of ethylenediamine tetraacetic acid-tartaric acid-silicone oil.
The mass ratio of the phosphoric acid modified steel slag powder to the phosphoric acid modified steel slag powder is 2: 100. In the graphene modified sodium silicate, the mass ratio of graphene to sodium silicate is 3:1000, and the molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein n is takenThe value is 3.
The mixture of semi-dry desulfurized fly ash and slaked lime is selected as a calcium ion balancing agent, and the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1: 3. The bentonite-citric acid-isobutyl triethoxysilane mixture is a complexing agent, and the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:40: 10.
The mixture of the vinyl acetate and the VAE rubber powder is used as redispersible latex powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 3: 10. The mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil is a chelating agent, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 1:5: 10.
The preparation method of the flame-retardant cement-based permeable crystallization waterproof coating comprises the following steps: mixing the silicate cement, the quartz sand and the phosphoric acid modified steel slag powder, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 100r/min to obtain a mixture.
And adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 400r/min to obtain the premix.
And adding a bentonite-citric acid-isobutyl triethoxy silicon mixture and a vinyl acetate-VAE rubber powder mixture into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 200r/min to obtain the flame-retardant cement-based permeable crystalline waterproof coating.
Example 5
The differences between this example and example 1 are listed below, and the non-listed contents are the same.
Taking 100g of the product prepared by the invention as an example, the product is prepared from the following raw materials by weight: 56.2g of portland cement, 26g of quartz sand as a filler, 6g of phosphoric acid modified steel slag powder, 1.8g of graphene modified sodium silicate, 2.5g of desulfurized fly ash to slaked lime, 2g of a bentonite-citric acid-isobutyl triethoxysilane mixture, 5g of vinyl acetate-VAE rubber powder and 0.5g of ethylenediamine tetraacetic acid-tartaric acid-silicone oil.
In the phosphoric acid modified steel slag powder, the mass ratio of phosphoric acid to steel slag powder is 4: 100. Stone (stone)Graphene modified sodium silicate, wherein the mass ratio of graphene to sodium silicate is 1: 1000. The molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein the value of n is 2.
The method comprises the following steps of selecting a mixture of semi-dry desulfurized fly ash and slaked lime as a calcium ion balancing agent, wherein the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1: 5.
The bentonite-citric acid-isobutyl triethoxysilane mixture is a complexing agent, and the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:30: 10. The mixture of the vinyl acetate and the VAE rubber powder is used as redispersible latex powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 1: 10. The mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil is a chelating agent, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 3:5: 10.
The preparation method of the flame-retardant cement-based permeable crystallization waterproof coating comprises the following steps: mixing the silicate cement, the quartz sand and the phosphoric acid modified steel slag powder, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 200r/min to obtain a mixture.
And adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 400r/min to obtain the premix.
And adding a bentonite-citric acid-isobutyl triethoxy silicon mixture and a vinyl acetate-VAE rubber powder mixture into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 400r/min to obtain the flame-retardant cement-based permeable crystalline waterproof coating.
Example 6
The differences between this example and example 1 are listed below, and the non-listed contents are the same.
Taking 100g of the product prepared by the invention as an example, the product is prepared from the following raw materials by weight: 53.3g of Portland cement, 22g of quartz sand filler, 7g of phosphoric acid modified steel slag powder, 1.2g of graphene modified sodium silicate, 4.5g of desulfurized fly ash to slaked lime, 3g of bentonite-citric acid-isobutyl triethoxysilane mixture, 8g of vinyl acetate-VAE rubber powder and 1g of ethylenediamine tetraacetic acid-tartaric acid-silicone oil.
In the phosphoric acid modified steel slag powder, the mass ratio of phosphoric acid to steel slag powder is 3: 100. The graphene modified sodium silicate is prepared from graphene and sodium silicate in a mass ratio of 2: 1000. The molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein the value of n is 2.5.
The mixture of semi-dry desulfurized fly ash and slaked lime is selected as a calcium ion balancing agent, and the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1: 4.
The mixture of the bentonite, the citric acid and the isobutyl triethoxysilane is a complexing agent, and the mass ratio of the bentonite, the citric acid and the isobutyl triethoxysilane is 40: 5. The mixture of the vinyl acetate and the VAE rubber powder is used as redispersible latex powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 2: 10. The mixture of the ethylenediamine tetraacetic acid, the tartaric acid and the silicone oil is a chelating agent, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 2:5: 10.
The preparation method of the flame-retardant cement-based permeable crystallization waterproof coating comprises the following steps: mixing the silicate cement, the quartz sand and the phosphoric acid modified steel slag powder, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 150r/min to obtain a mixture.
And adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the premix.
And adding a bentonite-citric acid-isobutyl triethoxy silicon mixture and a vinyl acetate-VAE rubber powder mixture into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystalline waterproof coating.
Example 7
A core master batch for a flame-retardant cement-based permeable crystallization waterproof coating is a mixture of bentonite, citric acid and isobutyl triethoxysilane, wherein the mass ratio of the bentonite, the citric acid and the isobutyl triethoxysilane is 100 (30-40): (5-10).
Comparative example 1
Taking 100g of product as an example, the product is prepared from the following raw materials by weight: 53.3g of portland cement, 22g of filler quartz sand, 5g of steel slag powder, 1.2g of graphene modified sodium silicate, 4.5g of desulfurized fly ash to slaked lime, 3g of bentonite-citric acid-isobutyl triethoxysilane mixture, 8g of vinyl acetate-VAE rubber powder and 1g of ethylenediamine tetraacetic acid-tartaric acid-silicone oil.
The Portland cement is 42.5-grade Portland cement. The grain diameter of the filler quartz sand is 0.5 mm-3 mm. The specific surface area of the steel slag powder is 400cm2/g～450cm2/g。
The crystallization precipitant is graphene modified sodium silicate, the mass ratio of the graphene to the sodium silicate is 2:1000, and the specific surface area of the graphene is 2630m2A light transmittance of 97.7% and an electrical conductivity of 106S/m, thermal conductivity of 5000W/m.k, and molecular formula of sodium silicate of SiO2·nNa2O·H2O, wherein the value of n is 2.5.
The calcium ion balancing agent is a mixture of semi-dry desulfurized fly ash and slaked lime, the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1:4, and the chemical component of the semi-dry desulfurized fly ash is SO3(30.74％)、CaO(63.54％)、MgO(0.56％)、SiO2(1.67％)、Al2O3(0.63％)、TiO2(0.05％)、K2O(0.36％)、Na2O(0.12％)、Cl(0.95％)、Fe2O3(0.83%) and others (0.55%), and the fineness thereof was 400 mesh.
The complexing agent is a mixture of bentonite, citric acid and isobutyl triethoxysilane, the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:40:5, and the main chemical component of the bentonite is SiO2(60.64％)、Al2O3(20.65％)、Fe2O3(7.49％)、FeO(0.43％)、CaO(1.73％)、MgO(5.74％)、Na2O(0.82％)、K2O(0.56％)、TiO2(0.98%) and others (0.96%) with a fineness of 400 mesh.
The redispersible latex powder is a mixture of vinyl acetate and VAE rubber powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 2: 10.
The chelating agent is a mixture of ethylenediamine tetraacetic acid, tartaric acid and silicone oil, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 2:5: 10.
Firstly, stirring the Portland cement, the filler and the flame-retardant filler for 10min by using a magnetic stirrer with the rotating speed of 150r/min at room temperature to obtain a mixture.
And secondly, adding a crystallization precipitator and a calcium ion balancing agent into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the premix.
And finally, adding a complexing agent and redispersible latex powder into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
Comparative example 2
Taking 100g of product as an example, the product is prepared from the following raw materials by weight: 53.3g of Portland cement, 22g of filler quartz sand, 7g of phosphoric acid modified steel slag powder, 1.2g of sodium silicate, 4.5g of desulfurized fly ash to slaked lime, 3g of bentonite to citric acid to isobutyl triethoxy silicon, 8g of vinyl acetate to VAE rubber powder and 1g of ethylene diamine tetraacetic acid to tartaric acid to silicone oil.
The Portland cement is 42.5-grade Portland cement; the filler is quartz sand with the particle size of 0.5 mm-3 mm;
the flame-retardant filler is phosphoric acid modified steel slag powder with the specific surface area of 400cm2/g～450cm2And/g, the mass ratio of the phosphoric acid to the steel slag powder is 3: 100.
The crystal precipitant is sodium silicate with molecular formula of SiO2·nNa2O·H2O, wherein the value of n is 2.5.
The calcium ion balancing agent is a mixture of semi-dry desulfurized fly ash and slaked lime, the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1:4, and the chemical component of the semi-dry desulfurized fly ash is SO3(30.74％)、CaO(63.54％)、MgO(0.56％)、SiO2(1.67％)、Al2O3(0.63％)、TiO2(0.05％)、K2O(0.36％)、Na2O(0.12％)、Cl(0.95％)、Fe2O3(0.83%) and others (0.55%), and the fineness thereof was 400 mesh.
The complexing agent is a mixture of bentonite, citric acid and isobutyl triethoxysilane, the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100:40:5, and the main chemical component of the bentonite is SiO2(60.64％)、Al2O3(20.65％)、Fe2O3(7.49％)、FeO(0.43％)、CaO(1.73％)、MgO(5.74％)、Na2O(0.82％)、K2O(0.56％)、TiO2(0.98%) and others (0.96%) with a fineness of 400 mesh.
The redispersible latex powder is a mixture of vinyl acetate and VAE rubber powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 2: 10.
The chelating agent is a mixture of ethylenediamine tetraacetic acid, tartaric acid and silicone oil, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 2:5: 10.
Firstly, stirring the Portland cement, the filler and the flame-retardant filler for 10min by using a magnetic stirrer with the rotating speed of 150r/min at room temperature to obtain a mixture.
And secondly, adding a crystallization precipitator and a calcium ion balancing agent into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the premix.
And finally, adding a complexing agent and redispersible latex powder into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
Comparative example 3
Taking 100g of the prepared product as an example, the product is prepared from the following raw materials by weight: 53.3g of Portland cement, 22g of quartz sand as a filler, 7g of phosphoric acid modified steel slag powder, 1.2g of graphene modified sodium silicate, 4.5g of desulfurized fly ash to slaked lime, 3g of citric acid to isobutyltriethoxysilane, 8g of vinyl acetate to VAE rubber powder and 1g of ethylenediamine tetraacetic acid to tartaric acid to silicone oil.
The Portland cement is 42.5-grade Portland cement; the filler is quartz sand with the particle size of 0.5 mm-3 mm.
The flame-retardant filler is phosphoric acid modified steel slag powder with the specific surface area of 400cm2/g～450cm2And/g, the mass ratio of the phosphoric acid to the steel slag powder is 3: 100.
The crystallization precipitator is graphene modified sodium silicate, the mass ratio of graphene to sodium silicate is 2:1000, and the specific surface area of graphene is 2630m2A light transmittance of 97.7% and an electrical conductivity of 106S/m, thermal conductivity of 5000W/m.k, and molecular formula of sodium silicate of SiO2·nNa2O·H2O, wherein the value of n is 2.5.
The calcium ion balancing agent is a mixture of semi-dry desulfurized fly ash and slaked lime, the mass ratio of the semi-dry desulfurized fly ash to the slaked lime is 1:4, and the chemical component of the semi-dry desulfurized fly ash is SO3(30.74％)、CaO(63.54％)、MgO(0.56％)、SiO2(1.67％)、Al2O3(0.63％)、TiO2(0.05％)、K2O(0.36％)、Na2O(0.12％)、Cl(0.95％)、Fe2O3(0.83%) and others (0.55%), and the fineness thereof was 400 mesh.
The complexing agent is a mixture of citric acid and isobutyl triethoxysilane, and the mass ratio of the citric acid to the isobutyl triethoxysilane is 100:40: 5.
The redispersible latex powder is a mixture of vinyl acetate and VAE rubber powder, and the mass ratio of the vinyl acetate to the VAE rubber powder is 2: 10.
The chelating agent is a mixture of ethylenediamine tetraacetic acid, tartaric acid and silicone oil, and the mass ratio of the ethylenediamine tetraacetic acid to the tartaric acid to the silicone oil is 2:5: 10.
Firstly, stirring the Portland cement, the filler and the flame-retardant filler for 10min by using a magnetic stirrer with the rotating speed of 150r/min at room temperature to obtain a mixture.
And secondly, adding a crystallization precipitator and a calcium ion balancing agent into the mixture, and stirring for 10min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the premix.
And finally, adding a complexing agent and redispersible latex powder into the premix, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
Comparative example 4
Taking 100g of product as an example, the waterproof master batch is purchased from a certain waterproof material company Limited in China, and the product is prepared from the following raw materials in parts by weight: 53.3g of Portland cement, 22g of quartz sand, 7g of phosphoric acid modified steel slag powder and 17.7g of waterproof master batch.
The Portland cement is 42.5-grade Portland cement;
the particle size of the quartz sand is 0.5 mm-3 mm;
the specific surface area of the phosphoric acid modified steel slag powder is 400mm2/g-450mm2The mass ratio of phosphoric acid to steel slag powder is 3: 100;
firstly, stirring Portland cement, quartz sand and phosphoric acid modified steel slag powder for 10min by using a magnetic stirrer with the rotating speed of 150r/min at room temperature to obtain a mixture.
And secondly, adding the waterproof master batch into the mixture, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
Comparative example 5
Taking 100g of product as an example, wherein the waterproof master batch is purchased from a certain waterproof material company Limited in China, and the product is prepared from the following raw materials in parts by weight: 60.3g of Portland cement, 22g of quartz sand and 17.7g of waterproof master batch.
The Portland cement is 42.5-grade Portland cement.
The grain diameter of the quartz sand is 0.5 mm-3 mm.
Firstly, stirring the Portland cement and the quartz sand for 10min by using a magnetic stirrer with the rotating speed of 150r/min at room temperature to obtain a mixture.
And then adding the waterproof master batch into the mixture, and stirring for 20min at room temperature by using a magnetic stirrer with the rotating speed of 300r/min to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
The performance of the flame-retardant cement-based permeable crystallization waterproof coating prepared in the embodiments 1 to 6 and the comparative examples 1 to 5 is detected by a vertical combustion method, and the specific process is as follows:
as shown in fig. 1, the flame-retardant cement-based capillary crystalline waterproof coating a is covered on one side of a test board 2, the test board 2 is placed on an iron stand 3 with an iron clamp, the test board 2 is horizontally arranged, one side of the test board 2 coated with the flame-retardant cement-based capillary crystalline waterproof coating faces an alcohol burner 4, the vertical distance between the test board and the mouth of the alcohol burner is about 7mm, timing is started when the flame temperature reaches about 1100 ℃, the timing is ended after the back fire surface of the test board is carbonized and cracks appear when the test board burns, and the difference between the end timing and the start timing is used as the flame-retardant time to show the flame-retardant performance of the flame-retardant cement-based capillary crystalline.
The impermeability and self-healing repair performance of the flame-retardant cement-based infiltration crystalline waterproof coating are tested according to JC 900-2002 and GB 18445-2012. As shown in table 1:
TABLE 1 Properties of flame-retardant Cement-based capillary crystalline waterproofing paint
The test results of the embodiment 6 and the embodiment 1 show that the steel slag can obviously improve the mechanical property, the impermeability, the flame retardant property and the wet base surface bonding strength of the test piece after being modified by phosphoric acid. From the test results of comparative example 2 and example 6, it can be seen that: the sodium silicate is modified by the graphene, so that the setting time of the coating can be shortened, the mechanical property, the impermeability and the wet base surface bonding strength of a test piece are improved, and the influence on the flame retardance is small. From the test results of comparative example 3 and example 6, it can be seen that: the bentonite is beneficial to improving the mechanical property, the impermeability, the wet base surface bonding strength and the flame retardance of the test piece. From the test results of comparative example 4, comparative example 5 and example 6, it can be seen that: compared with the active chemical substance, the active chemical substance has more advantages for improving various performances of concrete. From the test results of comparative example 4 and comparative example 5, it can be seen that: the phosphoric acid modified steel slag powder can greatly improve the fire resistance of concrete. In addition, in the experimental process, the aim of uniform stirring can be met at the selected stirring speed, and the stirring speed has no substantial influence on the performance of the waterproof coating.
Claims (9)
1. The flame-retardant cement-based permeable crystallization waterproof coating is characterized by being prepared from the following raw materials in percentage by mass:
40 to 60 percent of Portland cement,
20 to 30 percent of quartz sand,
5 to 10 percent of phosphoric acid modified steel slag powder,
1 to 2 percent of graphene modified sodium silicate,
2.5 to 5 percent of mixture of desulfurized fly ash and slaked lime,
1 to 5 percent of bentonite-citric acid-isobutyl triethoxysilane mixture,
5 to 10 percent of vinyl acetate-VAE rubber powder mixture,
0.5 to 1.5 percent of ethylenediamine tetraacetic acid-tartaric acid-silicone oil mixture;
the total mass content of the raw materials is 100 percent.
2. The flame-retardant cement-based permeable crystalline waterproof coating according to claim 1, wherein the specific surface area of the phosphoric acid-modified steel slag powder is 400cm2/g～450cm2And/g, the mass ratio of phosphoric acid to the steel slag powder in the phosphoric acid modified steel slag powder is (2-4): 100.
3. The flame-retardant cement-based permeable crystalline waterproof coating according to claim 1 or 2, wherein the graphene-modified sodium silicate has a specific surface area of 2630m2The graphene modified sodium silicate is characterized in that the mass ratio of graphene to sodium silicate is (1-3): 1000; the molecular formula of the sodium silicate is SiO2·nNa2O·H2O, wherein n is any value of 2-3.
4. The flame-retardant cement-based permeable crystallization waterproof coating as claimed in claim 1 or 2, wherein the mass ratio of the desulfurized fly ash to the slaked lime is 1 (3-5).
5. The flame-retardant cement-based permeable crystallization waterproof coating according to claim 1 or 2, wherein the mass ratio of bentonite to citric acid to isobutyl triethoxysilane in the bentonite to citric acid to isobutyl triethoxysilane mixture is 100 (30-40): (5-10).
6. The flame-retardant cement-based permeable crystallization waterproof coating as claimed in claim 1 or 2, wherein the mass ratio of vinyl acetate to VAE rubber powder in the mixture of vinyl acetate and VAE rubber powder is (1-3): 10.
7. The flame-retardant cement-based permeable crystallization waterproof coating according to claim 1 or 2, characterized in that in the mixture of ethylenediaminetetraacetic acid-tartaric acid-silicone oil, the mass ratio of ethylenediaminetetraacetic acid, tartaric acid and silicone oil is (1-3): 5: 10.
8. the preparation method of the flame-retardant cement-based permeable crystallization waterproof coating according to any one of claims 1 to 7, characterized by comprising the following steps:
weighing the raw materials, and mixing and stirring the portland cement, quartz sand and phosphoric acid modified steel slag powder to obtain a mixture;
adding a mixture of graphene modified sodium silicate and desulfurized fly ash-slaked lime into the mixture, and stirring to obtain a premix;
and adding a bentonite-citric acid-isobutyl triethoxysilane mixture, a vinyl acetate-VAE rubber powder mixture and an ethylene diamine tetraacetic acid-tartaric acid-silicone oil mixture into the premix, and stirring at room temperature to obtain the flame-retardant cement-based permeable crystallization waterproof coating.
9. A core master batch for a flame-retardant cement-based permeable crystallization waterproof coating is characterized by being a mixture of bentonite, citric acid and isobutyl triethoxysilane, wherein the mass ratio of the bentonite to the citric acid to the isobutyl triethoxysilane is 100 (30-40): (5-10).
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