CN111217582A - Waste red brick powder-based mineral polymer inorganic dry powder texture coating and preparation method thereof - Google Patents
Waste red brick powder-based mineral polymer inorganic dry powder texture coating and preparation method thereof Download PDFInfo
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- CN111217582A CN111217582A CN201811424657.5A CN201811424657A CN111217582A CN 111217582 A CN111217582 A CN 111217582A CN 201811424657 A CN201811424657 A CN 201811424657A CN 111217582 A CN111217582 A CN 111217582A
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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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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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
- C04B2111/2023—Resistance against alkali-aggregate reaction
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a waste red brick powder-based mineral polymer inorganic dry powder texture coating and a preparation method thereof, wherein the waste red brick powder is 40-85 parts, metakaolin 15-30 parts, blast furnace slag powder 20-35 parts, natural zeolite powder 1-3 parts, nano silicon dioxide 0.5-1 part, nano aluminum oxide 0.3-0.5 part, hollow micro-beads 2-5 parts, redispersible latex powder 1-2 parts, polyvinyl alcohol short fiber 0.1-0.2 part, nano attapulgite powder 1-2 parts, powdery sodium silicate 15-40 parts, ash calcium 2-5 parts and inorganic pigment 0-5 parts by weight are metered into a mixer and stirred for 20 minutes, and then the uniformly stirred dry powder is packaged and sealed to obtain the dry powder coating. The coating is healthy and environment-friendly, does not cake, has high storage stability, can be cured at normal temperature, has high bonding strength of the coating, is not crisp, is not whiskering or cracking, has excellent performances of super weather resistance, antibacterial stain resistance, scrub resistance, fire resistance and the like, can be coated on both inner and outer walls, and has convenient use, strong artistic plasticity, unique texture, natural color, fastness and long service life.
Description
Technical Field
The invention relates to the field of inorganic dry powder coating for decorating inner and outer walls of buildings, in particular to a waste red brick powder-based mineral polymer inorganic dry powder texture coating and a preparation method thereof.
Background
Inorganic dry powder building coatings have been widely used in interior and exterior wall decoration of buildings in developed countries instead of organic coatings, water-based coatings and ceramic tiles. The dry powder coating is refined by taking an inorganic cementing material as a main binder, taking a polymer material as a main additive and matching with high-quality mineral aggregate, a filler and natural minerals, so that various liquid chemical harmful film-forming, dispersing, wetting, leveling, corrosion and mildew prevention and other auxiliaries which are added for achieving the performance of the coating are omitted. The paint can be used after being added with water and stirred uniformly during site construction, is easy to scrape, saves labor and materials, forms a decorative coating after being coated, has bright and bright color and never fades, can obtain excellent texture and artistic decorative effect, has the functions of ventilation, durability, water resistance, health, environmental protection and the like, and is a latest environment-friendly paint.
At present, domestic inorganic dry powder building coatings can be mainly divided into the following categories:
⑴ is a dry powder coating of a pure redispersible rubber powder system, the performance of which is greatly dependent on the rubber powder, but the film forming difference between the redispersible rubber powder and the emulsion and the high curing condition lead to poor effects on the binding strength, the scrubbing resistance and the aging resistance, so that the coating cannot be applied on a large scale.
⑵ is a dry powder coating composed of redispersible rubber powder and inorganic powders such as gypsum, hydrated lime, cement, etc., and has the advantages of greatly improved water resistance, cohesiveness, washing resistance and aging resistance, and frost resistance and mould resistance, but a large amount of cement and lime in the components can generate soluble salt, and the soluble salt is easy to be efflorescent and whitened after being used, so that light color spots and color bloom appear on a dark color coating, namely the so-called whitening phenomenon, and the coating is easy to be agglomerated and caked in the storage and use processes, has poor fluidity in the use process, is easy to have the phenomena of sedimentation and post-thickening, the defects of the coating after being cured are difficult to cover, and finally the coating is reduced in cohesiveness and even becomes inviscid, and the phenomenon of powder removal after being put on the wall is serious.
⑶ is Geopolymer type inorganic dry powder coating, Geopolymer (Geopolymer) is an inorganic polymeric aluminosilicate mineral polymeric material, belonging to non-metallic material, originally proposed and named by professor j.davidovits of french scientists at the end of the 70 th 20 th century, because its special condensed three-dimensional network structure is similar to zeolite cage structure, the properties of the material come from [ -Si-O-Al-O- ] n skeleton, structure determining properties, cement is silico-calcium system, Geopolymer is silico-aluminum system, most stones on earth belong to silico-aluminum system, Geopolymer material is similar to ceramic but not required to be sintered, Geopolymer material has higher hardness, thermal stability and oxidation resistance than high molecular material, compared with ordinary portland cement, Geopolymer has the following characteristics of early strength of quick setting, high compressive strength, high temperature resistance, good wear resistance, strong acid and alkali corrosion resistance, excellent freeze thawing resistance, good durability, good interfacial bonding ability, good corrosion resistance, good energy consumption, low freezing and freezing resistance, compared with ordinary portland cement, the traditional cement, it is a lot of inorganic silicate cement, clay, it is a lot of environmental pollution-resistant, it is more than the traditional cement, it is a low-activated silica-clay, it is a raw material, it is a kind of environmental protection material, it is a ceramic, it is a kind of environmental protection material, it is not easy to utilize the environmental protection, it is not more than the environmental protection cement, it is a kind of silica clay, it is a kind of environmental protection material, it is a raw material, it is a kind of environmental protection, it is not more than the raw material, it is a silica clay, it is a raw material, it is a kind of clay, it is a silica clay, it is not more than the environmental protection material, it is a raw material, it is a kind of clay, it is a silica clay, it is not easy to be more than the raw material of.
The red brick is a sintered building brick which is made up by using clay, shale and coal gangue as raw material through the processes of pulverizing, mixing and kneading, manual or mechanical press-forming and drying, and firing at 900 deg.C or so with oxidizing flame. The waste red bricks are waste brick blocks in red brick production and waste red bricks generated after buildings are dismantled, and are common solid wastes in the building industry. According to statistics, in the past 50 years, at least 200 hundred million cubic clay red brick products are produced in China, and will be converted into construction waste in the future 50 years. The annual output of the waste red bricks in China is basically about 5200 ten thousand tons. Therefore, a large amount of waste red bricks are discarded or buried as construction wastes, which not only occupies land, but also pollutes the environment, and how to effectively and comprehensively utilize the waste red bricks as resources and change waste into valuable is a problem worthy of research. The crushed waste red bricks are used as aggregates of concrete and mortar to replace partial natural broken stones and sand, which is a main way for resource utilization at home and abroad at present, and the ground waste red brick powder contains a large amount of SiO2 and Al2O3 with potential activity, can replace partial expensive active silica-alumina mineral admixtures, is used for preparing geopolymers, not only reduces the price, but also provides a new way for reasonable utilization of the waste red bricks.
The development of wall decorative coatings today has been involved in diversification, fashion, personalization, and most importantly, health. People can feel profound pain on home decoration materials containing harmful substances such as formaldehyde, the concepts of green, inorganic and environment-friendly health are certainly in depth in future building paint markets, and only the inorganic ecological paint which is really green, environment-friendly, simple and natural and has excellent performance is the best choice for the public.
Disclosure of Invention
In order to overcome the defects of the prior inorganic dry powder coating product technology, the waste red brick powder-based mineral polymer inorganic dry powder texture coating is produced and obtained timely. The coating of the invention adopts nontoxic and harmless natural ecological inorganic mineral raw materials, skillfully utilizes the color of the waste red brick powder, the potential of a potentially active silicon-aluminum component and the potential of replacing a fine aggregate, and adopts a geopolymer technology to prepare the inorganic dry powder texture coating of the waste red brick powder-based mineral polymer, which takes the silicon-aluminum-based geopolymer as a film forming material and the waste red brick powder as a main pigment and filler. The coating disclosed by the invention has the advantages that pollution and toxicity are avoided from the source, no harmful substance is contained, the coating is healthy and environment-friendly, no caking is caused, the storage stability is high, the dispersibility and the fluidity are strong, the coating is cured at normal temperature, the bonding strength of the coating is high but the coating is not crisp, the coating does not bleed out alkali and crack, the coating has excellent performances such as super-strong weather resistance, antibacterial stain resistance, scrubbing resistance, fireproof flame retardance and the like, and outstanding functions of air purification, water resistance and air permeability, can be coated on both an inner wall and an outer wall, is convenient to use, can be used by being stirred into mud by adding water during use, can be directly constructed on a proper base material, does not need a primer, is suitable for various construction tools, and has strong artistic plasticity. The coating of the present invention has been practiced for more than four years of project application with good customer feedback.
The purpose of the invention is realized as follows:
a waste red brick powder-based mineral polymer inorganic dry powder texture coating is characterized in that: 40-85 parts of waste red brick powder, 15-30 parts of metakaolin, 20-35 parts of blast furnace slag powder, 1-3 parts of natural zeolite powder, 0.5-1 part of nano silicon dioxide, 0.3-0.5 part of nano aluminum oxide, 2-5 parts of hollow microspheres, 1-2 parts of redispersible latex powder, 0.1-0.2 part of polyvinyl alcohol short fibers, 1-2 parts of nano attapulgite powder, 15-40 parts of powdery sodium silicate, 2-5 parts of ash calcium and 0-5 parts of inorganic pigment are added into a dry powder mixer according to parts by weight and stirred for 20 minutes, and then the uniformly stirred powder is packaged and sealed to obtain the dry powder coating.
The waste red brick powder is a powdery material prepared by crushing, magnetic separation, light substance treatment, grinding, screening and drying pure red brick blocks without impurities, which are sorted out from waste red bricks in red brick production and waste red bricks produced after building demolition, and the technical indexes are as follows: the water content is less than or equal to 0.5 wt%; the sum of the contents of SiO2 and Al2O3 is more than or equal to 80 wt%; the content of Fe2O3 is more than or equal to 8 wt%; particle size: 50-66 wt% of 200-mesh powder and 34-50 wt% of 120-mesh powder; the methylene blue value is less than or equal to 0.5. Research results show that the grinding can greatly excite the potential chemical activity of SiO2 and Al2O3 in the waste red brick powder from the physical perspective, the smaller the particle size, the larger the specific surface area and the surface energy and the higher the activity, and the activity can be maximally excited by doping a certain amount of alkaline activator, the active SiO2 and Al2O3 in the waste red brick powder can react with the alkaline activator to generate geopolymer, and can generate hydration reaction with Ca (OH)2 in the gray calcium to generate hydrated calcium silicate and hydrated calcium aluminate, so that the paint has excellent film-forming property and can form excellent and continuous coating films, and the film-forming substances are calcium aluminate yellow feldspar and the geopolymer, so that the scrub resistance, the adhesive force, the breaking strength and the surface hardness are improved. The waste red brick powder used in the invention can also replace quartz sand to achieve good filling effect and micro-aggregate effect, replace mineral admixtures such as fly ash and the like, and when the waste red brick powder is used as a coating, unique texture can be obtained, the compactness of the coating can be enhanced, the water retention property and the fluidity of the coating can be improved, the phenomenon of thickening of the coating after construction can be effectively prevented, microcracks can be effectively reduced, and the crack resistance and the wear resistance of the coating can be improved.
The metakaolin is powder with the particle size of at least 1250 meshes, which is prepared by grinding and screening kaolin powder calcined at the high temperature of 600-900 ℃. The metakaolin is a raw material for preparing high-quality geopolymer, and can replace 15-20% of titanium dioxide in the exterior wall coating, so that the cost of the coating can be reduced, and the washability and chalking resistance of the coating are improved.
The blast furnace slag powder is commercially available S95 type ground slag. Is prepared from granulated blast furnace slag meeting GB/T203 standard through drying, grinding to obtain powder of S95 grade.
The natural zeolite powder is an inorganic chemical material sold in the market, and the technical indexes are as follows: the natural zeolite content is more than or equal to 50wt%, and the zeolite mineral with ammonia absorption value more than 100mg equivalent/100 g is crushed, ground, screened and dried to prepare powder with the grain size of at least 1000 meshes.
The nano silicon dioxide is an inorganic chemical material sold in the market, and the technical indexes are as follows: the average grain diameter is 15 +/-5 nm, the content of silicon dioxide is more than or equal to 99.5 wt%, and the apparent density is less than or equal to 0.12g/cm 3. The nano silicon dioxide, commonly known as 'ultra-fine white carbon black', is amorphous white powder, is nontoxic, tasteless and pollution-free, has a spherical microstructure, is in a flocculent and reticular quasi-particle structure, and is insoluble in water. The material has the characteristics of small particle size, more micropores, large specific surface area, high surface hydroxyl content, good dispersion performance, good extinction performance and the like. The filling power of the dry powder coating can be improved, adhesion among powder particles can be prevented, the anti-caking effect is good, and the suspension stability, thixotropy, reinforcement, aging resistance, corrosion resistance, washing resistance, coating dirt resistance and other properties of the coating can be obviously improved.
The nano-alumina is an inorganic chemical material sold in the market, and the technical indexes are as follows: the average grain diameter is 10-20nm, the content of Al2O3 is more than or equal to 99.9 wt%, the apparent density is 0.1-0.2g/cm3, the loss on ignition is less than 0.5%, and the specific surface area is 110 +/-10 m 2/g. The nano-aluminum oxide has the internal surface area per gram of hundreds of square meters, high activity and strong adsorption capacity, can improve the bulkiness of the dry powder coating to prevent powder particles from being adhered, and has good anti-caking effect.
The hollow microspheres are commercially available materials, are off-white or pure white in appearance, and are loose inorganic non-metal powder materials with good fluidity. The technical indexes are as follows: the bulk density is 0.33-0.4g/cm3, and the particle size is at least 300 meshes. The main components of the hollow microspheres are silicon dioxide and aluminum oxide which are sintered and sorted at the high temperature of 1400 ℃, and when the hollow microspheres are used in dry powder paint, the dispersibility and the fluidity of the paint can be greatly improved, and the paint is prevented from caking. The coating can control the gloss of the coating, inhibit drying shrinkage cracking, eliminate fiber exposure, insulate sound and resist flame, and enhance the hardness, weather resistance, corrosion resistance, washing resistance and wear resistance of the coating.
The redispersible latex powder is a material sold in the market, and the technical indexes are as follows: ash content 10 + -2 wt%; the solid content is more than or equal to 98wt%, the bulk density is 300-500g/L, the particle size is 55-135 μm, and the tensile strength is more than or equal to 6.0 MPa. It can improve the waterproof performance, flexibility, adhesive strength, wear resistance and alkali resistance of the paint powder and improve the construction performance of the paint.
The polyvinyl alcohol short fiber is a fiber material sold in the market, and the technical indexes are as follows: the length is less than or equal to 3mm, and the Young modulus is more than or equal to 290 cn/dtex. It is non-toxic and harmless, has good dispersibility, high strength, acid and alkali resistance and strong weather resistance, and can obviously improve the crack resistance of the coating.
The nano attapulgite powder is an inorganic chemical material sold in the market, and the technical indexes are as follows: the dry basis standard, the content of the attapulgite is more than or equal to 95 wt%, the average particle size is 20-70 nm, the water content is less than or equal to 3%, and the bulk density is 0.03-0.25 g/cm 3. The nano attapulgite powder is prepared by carrying out grading, dissociation, purification, ultra-fining and surface modification on attapulgite clay. Attapulgite clay belongs to sepiolite family in mineralogical classification and is hydrous layer chain-shaped magnesia-alumina silicate. The attapulgite is a crystalline magnesium aluminum silicate mineral, has a unique layer chain structure characteristic, and the crystals are needle-shaped and fibrous aggregates. The experimental result shows that the nano attapulgite powder serving as a thickening agent and a suspending agent of the coating can effectively adjust the viscosity of the coating, has excellent anti-settling property, can effectively prevent the coating from sagging, improves the construction performance, can form a disordered fibrous micro-space network structure in the coating, and can play a role in anti-cracking and reinforcing of fiber mesh cloth.
The powdery sodium silicate is a commercially available powdery sodium silicate with a modulus of 1.4. It can be used in combination with lime-calcium to excite the chemical activity of waste red brick powder to the maximum extent, and can react with alumino-silica materials such as metakaolin, blast furnace slag powder and waste red brick powder to generate geopolymer.
The ash calcium is commercially available ash calcium powder with the particle size of at least 400 meshes. The lime is prepared by calcining natural high-quality limestone with CaCO3 as main component at high temperature to obtain quicklime (CaO), selecting, digesting, drying, and pulverizing with a high-speed winnowing hammer mill, wherein the main component is a mixture of Ca (OH)2, CaO and a small amount of CaCO3, and the limestone is a finished product of lime. The sierozem powder can not only stimulate the chemical activity of the waste red brick powder, but also has excellent mildew-proof and antibacterial functions.
The inorganic pigment is an iron oxide pigment, is a natural iron oxide mineral pigment, and has excellent weather resistance and color retention.
The preparation method of the waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the following steps: 40-85 parts of waste red brick powder, 15-30 parts of metakaolin, 20-35 parts of blast furnace slag powder, 1-3 parts of natural zeolite powder, 0.5-1 part of nano silicon dioxide, 0.3-0.5 part of nano aluminum oxide, 2-5 parts of hollow microspheres, 1-2 parts of redispersible latex powder, 0.1-0.2 part of polyvinyl alcohol short fibers, 1-2 parts of nano attapulgite powder, 15-40 parts of powdery sodium silicate, 2-5 parts of ash calcium and 0-5 parts of inorganic pigment are sequentially put into a measuring bin according to parts by weight, and after being inspected, the measuring bin is put into a dry temperature-controlled stirring container with the rotating speed of 70-90 revolutions per minute, the materials are stirred for 10 minutes clockwise and anticlockwise respectively, the materials are put into a storage bin after being uniformly mixed, and after being sampled, tested and qualified, an automatic packing machine is started, and finished products are put into storage.
The application method of the waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the steps of weighing clean water according to the water-solid weight ratio of 0.3-0.5, mixing the clean water with dry powder, and uniformly stirring by using an electric stirrer. Stirring for 3-5 min to reach the viscosity effect after 3 min, and applying with one or more of napping roller, embossing roller, special roller, knife, spray gun and brush to obtain different shapes of coating.
The coating of the present invention has been practiced for more than four years of project application with good customer feedback. The product of the invention has the characteristics and positive beneficial effects that:
⑴ many inorganic dry powder coating sold on the market has the characteristic of easy caking in the process of storage and use, namely, the original loose state is mutually bonded to form a lump, the inorganic dry powder coating requires the material to be even, no caking and one of the important indexes of the product quality of the inorganic dry powder coating with the anti-caking performance.
⑵ construction convenience degree, ① the ecological paint of the invention is single component powder package, storage transportation stable performance, long quality guarantee period, convenient use, to the construction site according to the instructions, directly adding water to stir into mud to use, under normal temperature curing reaction, both internal and external wall can be coated, can be directly on the appropriate substrate construction, can be used for the cement mortar surface, putty surface, concrete surface, brick surface, does not need primer, has excellent construction performance, overcomes the traditional inorganic paint storage stability is poor, the curing agent is not easy to disperse evenly and the construction is troublesome when using, ② waste red brick powder water retention, the construction is good, the plasticity is strong, is suitable for various construction tools, can spray, roll, brush, can press and smear, the relief, the effect of napping is more beautiful, can fully show the originality of wall skill, designer, proprietor, can produce different texture effects, can be more perfectly combined with natural environment, building style and historical landscape, can meet the individual demand.
⑶ in appearance texture, because the invention uses waste red brick powder as main pigment and filler, and because of the excellent extinction property of nano silicon dioxide and hollow micro-beads in the components, the texture is unique, the color is natural, the waste red brick powder with the most appropriate chroma can be used according to the natural color of the waste red brick powder, and inorganic pigment is not added or is added as little as possible, because the color of the waste red brick powder is very close to the color of warm-tone soil, the using effect is close to natural, the waste red brick powder is similar to a natural yellow mud plastering surface, and the waste red brick powder has original, plain, warm and pleasant feeling, simple and soft color, and is not easy to cause visual fatigue.
⑷ the main raw material is nontoxic and harmless natural ecological inorganic mineral material, when in use, water is used as medium, no harmful substance or solvent is contained, harmful substances such as formaldehyde, volatile organic compounds and heavy metals are fundamentally eliminated, no adverse effect on environment and health is caused in the production and use processes, and the paint is nontoxic, harmless and pollution-free and is pure environment-friendly healthy paint.
⑸ quality and performance of the product, the color of the waste red brick powder, potential of replacing fine aggregate and high-quality mineral admixture, the light weight, water retention and porosity of the waste red brick powder, the geopolymer technology and the GZM high-frequency resonance grinding machine nano powder production technology are introduced to prepare the waste red brick powder-based inorganic mineral polymerized dry powder texture coating which takes the silicon-aluminum-based matrix polymer as a film forming material and takes the waste red brick powder as a main pigment and filler, so that the coating is continuously developed towards light weight, high strength, durability, economy, energy conservation, environmental protection and the like, the inorganic ecological coating has the excellent characteristics of ① alkali resistance and strong alkali resistance, the inorganic ecological coating is alkaline and compatible with all alkaline base materials, so that the phenomena of skinning, pulverization and alkali return are not generated, ② has super weather resistance, strong corrosion resistance, never fading and long service life, the new paint can generate a function with the alkaline mineral matrix (chemical action to be combined together, and can be applied to a waterproof, acid-proof, alkali-resistant, corrosion, durable, strong-resistant, anti-corrosive, anti-.
⑹ aiming at the defects of geopolymer such as high brittleness, easy cracking and easy saltpetering, the invention has the innovation points that:
① the flexibility, crack resistance and water resistance of the paint are improved by polyvinyl alcohol fiber and redispersible latex powder.
② geological polymerization is promoted by the highly active nanosilica and the excess alkali is continuously consumed.
③ the waste red brick has small granularity and large specific surface area, and can play a good filling effect and a good micro-aggregate effect, improve the internal structure of the geopolymer, enhance the compactness of the coating, effectively reduce microcracks and inhibit saltpetering.
④ the powder has mechanical activation effect on waste red brick powder, active SiO2 and Al2O3 in the waste red brick powder can generate geopolymer with alkaline activator, and can generate hydration reaction with Ca (OH)2 in the ash calcium to generate hydrated calcium silicate and hydrated calcium aluminate, so that more nucleation positions are provided for the formation of geopolymer, thereby increasing the geopolymerization reaction rate and reaction degree, and the more sufficient the geopolymerization reaction, the less the excessive alkaline substance is, the less the efflorescence is.
⑤ A little ash calcium is matched with powdery sodium silicate, which can excite the chemical activity of waste red brick powder to the utmost extent, promote geopolymerization reaction, improve the compactness of geopolymer, and inhibit efflorescence.
⑥ the natural zeolite powder in the composition has strong cation exchange capacity, and can reduce the amount of soluble alkali metal ions in the geopolymer, thereby inhibiting efflorescence.
⑦ the nanometer attapulgite powder in the components has unique layer chain structure characteristics, and the crystal is needle-shaped and fibrous aggregate, can form a disordered fibrous micro-space network structure in the coating, and can play a role in anti-cracking and reinforcing of fiber mesh cloth.
⑺ aiming at the problems of poor fluidity and easy sedimentation and post-thickening of the current inorganic dry powder coating in the using process, the waste red brick powder used in the invention can replace cellulose to improve the water retention, fluidity and construction performance of the coating, and can effectively prevent the post-thickening of the coating in the construction.
⑻ the invention makes full use of the special quality of waste red brick powder, which can improve the performance of the paint, improve the quality of the paint, obtain unique texture, and utilize the secondary resource of the waste red brick, thus changing waste into valuable and having the significance of saving energy, resources and protecting environment.
Detailed Description
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
Example 1
1. The preparation method of the waste red brick powder comprises the following steps:
⑴ the waste red bricks are sorted, cleaned and dried for use.
⑵ and crushing with a impact crusher.
⑶ the magnetic separator is used to remove impurities such as iron nails.
⑷ and removing impurities such as plastics and wood dust by light material processor.
⑸ was then ground by a GZM HF resonance grinder.
⑹ the ground powder was sieved.
⑺ and drying by a dryer to obtain the waste red brick powder with corresponding mesh.
⑻ and then according to the particle size requirement of the waste red brick powder, putting the waste red brick powder with different meshes into a drying temperature-controlled stirring container according to the weight, stirring for 10 minutes clockwise and anticlockwise at the rotation speed of 70-90 r/min, uniformly mixing, and then putting into a waterproof and moistureproof sealed container for later use.
The technical indexes of the waste red brick powder prepared by tests are as follows: the content of SiO2 is 63.8%; the content of Al2O3 is 21.65 percent; the content of Fe2O3 is 12.7 percent; the sum of the contents of SiO2 and Al2O3 is 85.45 wt%; the water content was 0.4 wt%; particle size: 66 wt% of 200-mesh powder and 34 wt% of 120-mesh powder; methylene blue value was 0.5.
2. A preparation method of a waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the following steps:
putting 85 parts of waste red brick powder, 30 parts of metakaolin, 35 parts of blast furnace slag powder, 3 parts of natural zeolite powder, 1 part of nano silicon dioxide, 0.5 part of nano aluminum oxide, 5 parts of hollow microspheres, 2 parts of redispersible latex powder, 0.1 part of polyvinyl alcohol short fibers, 2 parts of nano attapulgite powder, 30 parts of powdered sodium silicate and 5 parts of ash calcium in a metering bin in sequence according to parts by weight, putting the metering bin into a dry temperature-controlled stirring container after the inspection is correct, stirring the mixture for 10 minutes clockwise and anticlockwise at the rotating speed of 70-90 revolutions per minute, putting the mixture into a storage bin after the mixture is uniformly mixed, starting an automatic packing machine to pack after sampling, testing and detecting the product to be qualified, and putting the finished product into a warehouse. The paint prepared in the example is not added with inorganic pigment, the natural color of the waste red brick powder is fully utilized, and the color texture is most similar to the loess in the nature.
3. The use method of the waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the following steps:
the clean water is weighed according to the water-solid weight ratio of 0.3-0.5, and the clean water and the dry powder are mixed and then are uniformly stirred by an electric stirrer for use. Stirring for 3-5 min to reach the viscosity effect after 3 min, and applying with one or more of napping roller, embossing roller, special roller, knife, spray gun and brush to obtain different shapes of coating.
Example 2
A preparation method of a waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the following steps:
40 parts of waste red brick powder, 15 parts of metakaolin, 20 parts of blast furnace slag powder, 1 part of natural zeolite powder, 0.5 part of nano silicon dioxide, 0.3 part of nano aluminum oxide, 2 parts of hollow microspheres, 1 part of redispersible latex powder, 0.1 part of polyvinyl alcohol short fibers, 1 part of nano attapulgite powder, 20 parts of powdery sodium silicate, 2 parts of ash calcium and 5 parts of iron oxide orange toner are sequentially put into a metering bin according to parts by weight, the metering bin is put into a dry temperature-controlled stirring container after being checked, the rotating speed is 70-90 r/min, the mixing is carried out for 10 min clockwise and anticlockwise respectively, the mixing is evenly put into a storage bin, an automatic packing machine is started to pack after sampling, testing and qualification, and finished products are put into storage. The paint prepared in this example was orange-yellow in color, more yellow in color than the paint prepared in case 1. The specific preparation method of the waste red brick powder and the use method of the coating are the same as in case 1.
Example 3
1. The preparation method of the waste red brick powder comprises the following steps:
⑴ the waste red bricks are sorted, cleaned and dried for use.
⑵ and crushing with a impact crusher.
⑶ the magnetic separator is used to remove impurities such as iron nails.
⑷ and removing impurities such as plastics and wood dust by light material processor.
⑸ was then ground by a GZM HF resonance grinder.
⑹ the ground powder was sieved.
⑺ and drying by a dryer to obtain the waste red brick powder with corresponding mesh.
⑻ and then according to the particle size requirement of the waste red brick powder, putting the waste red brick powder with different meshes into a drying temperature-controlled stirring container according to the weight, stirring for 10 minutes clockwise and anticlockwise at the rotation speed of 70-90 r/min, uniformly mixing, and then putting into a waterproof and moistureproof sealed container for later use.
The technical indexes of the waste red brick powder prepared by tests are as follows: the content of SiO2 is 62.4%; the content of Al2O3 is 23.6 percent; the content of Fe2O3 is 9.1 percent; the sum of the contents of SiO2 and Al2O3 is 86 wt%; the water content was 0.3 wt%; particle size: 50wt% of 200 mesh powder and 50wt% of 120 mesh powder; methylene blue value was 0.5.
2. A preparation method of a waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the following steps:
50 parts of waste red brick powder, 15 parts of metakaolin, 30 parts of blast furnace slag powder, 3 parts of natural zeolite powder, 1 part of nano silicon dioxide, 0.5 part of nano aluminum oxide, 3 parts of hollow microspheres, 2 parts of redispersible latex powder, 0.1 part of polyvinyl alcohol short fibers, 2 parts of nano attapulgite powder, 20 parts of powdered sodium silicate, 3 parts of ash calcium and 3 parts of iron oxide red powder are sequentially put into a metering bin according to parts by weight, the metering bin is put into a dry temperature-controlled stirring container after being checked to be correct, the rotating speed is 70-90 revolutions per minute, the stirring is carried out for 10 minutes clockwise and anticlockwise respectively, the materials are put into a storage bin after being uniformly mixed, and after sampling, testing and qualification, an automatic packing machine is started to pack, and finished products are put into storage. The coating prepared in the example is brick red, and the texture of the coating is more rough and more stereoscopic than that of cases 1 and 2. The application method is the same as that of case 1.
The coating of the present invention has been practiced for more than four years of project application with good customer feedback. The coating is healthy and environment-friendly, does not agglomerate, has high storage stability, strong dispersibility and fluidity, can be cured at normal temperature, has high coating bonding strength, does not become crisp, does not become efflorescent, does not crack, has excellent performances such as super-high weather resistance, antibacterial stain resistance, scrub resistance, fire resistance, flame retardance and the like, has outstanding functions of purifying air, preventing water and permeating, has strong artistic plasticity, unique texture, natural color, no fading and long service life, can be coated on both inner and outer walls, can be directly constructed on a proper base material, does not need primer, is convenient to use, weighs clean water according to the water-solid weight ratio of 0.3-0.5, and can be used after being mixed with dry powder and uniformly stirred by using an electric stirrer. Stirring for 3-5 min to reach the viscosity effect after 3 min, and applying with one or more of napping roller, embossing roller, special roller, knife, spray gun and brush to obtain different shapes of coating. Various performances of the inorganic dry powder coating product of the invention completely meet the technical requirements of inorganic dry powder exterior wall coating JG/T445-2014. The test results are shown in the following table:
the present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any variations in the formulation or components thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (2)
1. A waste red brick powder-based mineral polymer inorganic dry powder texture coating is characterized in that: the paint is prepared by taking a silicon-aluminum-based polymer as a film forming material, taking waste red brick powder as a main pigment and filler, adding 40-85 parts of waste red brick powder, 15-30 parts of metakaolin, 20-35 parts of blast furnace slag powder, 1-3 parts of natural zeolite powder, 0.5-1 part of nano silicon dioxide, 0.3-0.5 part of nano aluminum oxide, 2-5 parts of hollow microspheres, 1-2 parts of redispersible latex powder, 0.1-0.2 part of polyvinyl alcohol short fiber, 1-2 parts of nano attapulgite powder, 15-40 parts of powdery sodium silicate, 2-5 parts of gray calcium and 0-5 parts of inorganic pigment into a dry powder mixer according to a weight ratio, stirring for 20 minutes, packaging and sealing the uniformly stirred powder to obtain the dry powder paint.
2. The waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the waste red brick powder is a powdery material prepared by crushing, magnetic separation, light substance treatment, grinding, screening and drying pure red brick blocks without impurities, which are sorted out from waste red bricks in red brick production and waste red bricks produced after building demolition, and the technical indexes are as follows: the water content is less than or equal to 0.5 wt%; the sum of the contents of SiO2 and Al2O3 is more than or equal to 80 wt%; the content of Fe2O3 is more than or equal to 8 wt%; particle size: 50-66 wt% of 200-mesh powder and 34-50 wt% of 120-mesh powder; the methylene blue value is less than or equal to 0.5;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the metakaolin is powder with the particle size of at least 1250 meshes, which is prepared by grinding and screening kaolin powder calcined at the high temperature of 600-900 ℃;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the blast furnace slag powder is commercially available S95 type ground slag;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the natural zeolite powder is an inorganic chemical material sold in the market, and the technical indexes are as follows: the natural zeolite content is more than or equal to 50wt%, and the zeolite mineral with ammonia absorption value more than 100mg equivalent/100 g is crushed, ground, screened and dried to prepare powder with the grain size of at least 1000 meshes;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the nano silicon dioxide is an inorganic chemical material sold in the market, and the technical indexes are as follows: the average grain diameter is 15 +/-5 nm, the content of silicon dioxide is more than or equal to 99.5 wt%, and the apparent density is less than or equal to 0.12g/cm 3;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the nano-alumina is an inorganic chemical material sold in the market, and the technical indexes are as follows: the average grain diameter is 10-20nm, the content of Al2O3 is more than or equal to 99.9 wt%, the apparent density is 0.1-0.2g/cm3, the loss on ignition is less than 0.5%, and the specific surface area is 110 +/-10 m 2/g;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the hollow microspheres are commercially available materials, are offwhite or pure white in appearance, and are loose inorganic non-metal powder materials with good fluidity;
the technical indexes are as follows: the bulk density is 0.33-0.4g/cm3, and the particle size is at least 300 meshes;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the redispersible latex powder is a material sold in the market, and the technical indexes are as follows: ash content 10 + -2 wt%; the solid content is more than or equal to 98wt%, the bulk density is 300-500g/L, the particle size is 55-135 mu m, and the tensile strength is more than or equal to 6.0 MPa;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the polyvinyl alcohol short fiber is a fiber material sold in the market, and the technical indexes are as follows: the length is less than or equal to 3mm, and the Young modulus is more than or equal to 290 cn/dtex;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the nano attapulgite powder is an inorganic chemical material sold in the market, and the technical indexes are as follows: the dry basis standard, the content of the attapulgite is more than or equal to 95 wt%, the average particle size is 20-70 nm, the water content is less than or equal to 3%, and the bulk density is 0.03-0.25 g/cm 3;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the powdery sodium silicate is commercially available with the modulus of 1.4;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the ash calcium is commercially available ash calcium powder with the particle size of at least 400 meshes;
the waste red brick powder-based geopolymer inorganic dry powder texture coating as claimed in claim 1, wherein: the inorganic pigment is iron oxide pigment;
the method for preparing the waste red brick powder-based mineral polymer inorganic dry powder texture coating as claimed in claim 1, wherein the method comprises the following steps: adding 40-85 parts of waste red brick powder, 15-30 parts of metakaolin, 20-35 parts of blast furnace slag powder, 1-3 parts of natural zeolite powder, 0.5-1 part of nano silicon dioxide, 0.3-0.5 part of nano aluminum oxide, 2-5 parts of hollow microspheres, 1-2 parts of redispersible latex powder, 0.1-0.2 part of polyvinyl alcohol short fibers, 1-2 parts of nano attapulgite powder, 15-40 parts of powdery sodium silicate, 2-5 parts of ash calcium and 0-5 parts of inorganic pigment into a dry powder mixer according to parts by weight, stirring for 20 minutes, packaging the uniformly stirred powder, and sealing to obtain a dry powder coating;
the method for preparing the waste red brick powder-based mineral polymer inorganic dry powder texture coating as claimed in claim 1, wherein the method comprises the following steps: the application method of the waste red brick powder-based mineral polymer inorganic dry powder texture coating comprises the steps of weighing clean water according to the water-solid weight ratio of 0.3-0.5, and mixing and stirring the clean water and dry powder uniformly for use.
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