CN110818325A - Salt coat composition for building, salt slurry for building and application of salt slurry - Google Patents
Salt coat composition for building, salt slurry for building and application of salt slurry Download PDFInfo
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- CN110818325A CN110818325A CN201910440432.7A CN201910440432A CN110818325A CN 110818325 A CN110818325 A CN 110818325A CN 201910440432 A CN201910440432 A CN 201910440432A CN 110818325 A CN110818325 A CN 110818325A
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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
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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
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
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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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention relates to a salt coat composition for buildings, salt slurry for buildings and application thereof. The salt coating composition for buildings comprises salt granules, a water retention agent and optional salt powder. The salt slurry for construction comprises the salt coating composition and water. The main components of the building salt slurry provided by the invention are salt particles and a water-retaining agent, the material of salt is innovatively introduced, the protection and health promotion effects of salt therapy on bodies are introduced, the green, natural and environment-friendly advantages of salt materials are combined, the traditional plastering mortar and putty for building interior walls in the traditional sense can be replaced, and the raw material source is wide and environment-friendly.
Description
Technical Field
The invention relates to the field of environment-friendly and green building materials, in particular to a salt coat composition for buildings. In addition, the invention also relates to salt slurry for buildings containing the salt coating composition and application thereof.
Background
The protection, leveling and decoration functions of the existing building interior wall are mainly realized by plastering mortar, masonry mortar, putty and the like, and the plastering mortar and the putty are used as traditional building materials and consume a large amount of cement, sierozem powder and aggregate (sand), so that a large amount of resources and energy are consumed in the production, use and recovery processes, and negative effects such as environmental pollution are brought. Along with the implementation of national sustainable development strategy and the increasing requirements of people on the health, environmental protection and friendliness of building materials, green building materials with health, environmental protection and friendliness are developed, which not only meet the aim of national sustainable development, but also meet the high-quality living demands of people.
Salt therapy treatment is a modern physical therapy method, namely salt powder particles are utilized to effectively clean a respiratory system and purify indoor air quality in a salt cavern which is constructed by salt and simulates natural salt mine, so that the immunity of the respiratory system of a human body is improved, diseases such as rhinitis, pharyngitis, asthma, respiratory tract and the like are prevented and treated, the effects of diminishing inflammation and sterilizing the skin are achieved, and meanwhile, the blood circulation can be promoted and the removal of dirt in the body is accelerated. Therefore, the building material mainly composed of salt can achieve the practical functions of the traditional building material, has the functions of purifying indoor air, adjusting indoor humidity, promoting human health, killing bacteria and inhibiting environmental colonies and the like, and can be developed as a novel building material.
The main component of the salt powder is sodium chloride, and the salt powder has certain hydraulicity, namely, a small amount of water is added into the excessive salt powder to form a mud-like or paste-like slurry, so that the salt powder has certain bonding capability and forming capability, and has certain compression strength and tensile strength after being naturally dried. The salt particles have certain hardness, only the NaCl on the surface layer of the salt particles can be dissolved after a small amount of water is added into the excessive salt particles, and the granularity and the particle shape of the salt particles are basically kept as the original state. Therefore, in theory, the NaCl salt powder can partially replace cement and sierozem powder to be used as a cementing material, and the NaCl salt particles can replace sand to be used as a fine aggregate to be used in a specific building material.
At present, no patent is disclosed about the preparation of salt slurry (salt coating) building materials for building inner walls by using salt powder to replace cement, sierozem powder and salt particles to replace sand and other materials at home and abroad.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a salt coat composition for buildings in a first aspect, the salt coat composition provided by the invention comprises salt particles and a water-retaining agent as main components, can replace the traditional plastering mortar and putty for building interior walls in the traditional sense, and is wide in raw material source and environment-friendly.
The second aspect of the invention provides salt slurry for buildings, which creatively introduces a material of salt, introduces the health protection effect of salt therapy on human bodies, and combines the advantages of green, natural and environment-friendly salt materials.
In a third aspect of the invention, the salt coating composition and the application of salt slurry for construction are provided.
According to a first aspect, the present invention provides a salt coat composition comprising salt granules and a water retention agent, and optionally salt fines.
According to some embodiments of the present invention, the fineness of the salt particles in the salt coat composition is 10-70 mesh, when the fineness of the salt particles is less than 10 mesh, the particle size is too large, which results in increased inter-particle pores and reduced inter-particle contact area, resulting in decreased tensile bond strength of the material, and when the fineness of the salt particles is more than 70 mesh, the salt slurry is less transparent and glittering in gloss and granular feel after coagulation forming.
In some preferred embodiments of the invention, the salt particles have a fineness of 20-50 mesh.
According to some embodiments of the invention, the fineness of the salt powder in the salt-coating composition is 200-400 meshes, when the fineness of the salt powder is lower than 200 meshes, the proportion occupied by fine particles in the mixture ratio is too small, the consistency and the workability of the material are reduced, and in order to ensure good workability, the dosage of the additive must be increased, so that the cost is increased; and the fineness of the salt powder is larger than 400 meshes, so that the proportion of the proportioned fine particles is too large, the water demand is increased, the coagulation of salt slurry is further delayed, and the next process is influenced.
In some preferred embodiments of the present invention, the fineness of the salt fines is 250-325 mesh.
According to some embodiments of the invention, the water retaining agent is selected from one or more of cellulose ethers, preferably from one or more of methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, carboxyethyl cellulose.
According to some embodiments of the invention, the water retaining agent is hydroxyethyl cellulose, is a pale yellow or white powder in appearance, and has a Brookfield viscosity of 2000 and 4000mPa s. The main function of the water retention agent is to maintain proper consistency and workability, avoid segregation and premature loss of water in the salt coating and improve the performance of hardened salt coating
According to some embodiments of the present invention, when no salt powder is contained in the salt coating composition, the mass ratio of the salt granules to the water retention agent is (50-150):1, preferably (60-90):1, and more preferably (60-70): 1.
According to some embodiments of the invention, when salt fines are present in the salt coating composition, the ratio of the sum of the mass of the salt fines and salt granules to the mass of the water retaining agent is (50-350):1, preferably (100-: 1, more preferably (150-: 1, the mass ratio of the salt particles to the salt powder is (1-80):1, preferably (5-60):1, more preferably (6-50):1, most preferably (7-12):1, in the salt coating composition of the present invention, the increase of the content of the salt powder is advantageous for the improvement of the tensile bond strength, however, if the content of the salt powder is too high, since the particle size of the salt powder is fine and the specific surface area is large, the dissolution of the salt powder requires a large amount of water, so that the water requirement for increasing the salt powder content is increased rapidly, and finally, the setting time and the surface drying time are prolonged seriously, which is unfavorable for construction; secondly, the porosity of the material is reduced due to the increase of the content of the salt powder, firstly, the glittering and translucent glossiness of the material is reduced, secondly, the mass transfer of NaCl particles or molecules below the surface layer to the indoor air is hindered, and the salt therapy characteristic of the invention cannot be better exerted.
According to some embodiments of the invention, the salt particles and the salt fines are salt particles and salt fines, respectively, of an inorganic salt, preferably an alkali metal and an alkaline earth metal salt.
According to some embodiments of the invention, the salt particles and the salt fines are halides, more preferably chlorides, most preferably sodium chloride, of alkali metals and alkaline earth metals, respectively.
According to some embodiments of the present invention, the salt particles and salt powder in the salt coating composition of the present invention may be one or more of sodium carbonate, sodium chloride, potassium chloride, sodium sulfate, calcium sulfate, potassium sulfate and calcium chloride, respectively, and according to the solubility of each inorganic salt in water, a novel salt slurry system meeting national and industrial standards can be obtained by adjusting the corresponding material mixing ratio.
According to some embodiments of the invention, the salt coat composition further comprises an admixture.
According to some embodiments of the invention, the admixture comprises one or more of a thickener, an air entraining agent, a foam stabilizer, and an inorganic pigment.
The main function of the thickener is to increase viscosity and to increase sag resistance, which according to some embodiments of the present invention is selected from one or more of polyacrylamide, water-soluble starch and starch ether, preferably from one or more of modified starch ether.
In some embodiments of the invention, the thickener is a modified starch ether manufactured by Avebe, Netherlands, Inc. (Avebe) under the Casucol301 designation, free of plasticizers and organic solvents, in the form of a white powder in appearance, having a pH of 9.5 to 11 (3.75% aqueous solution), and soluble in cold water.
According to some embodiments of the invention, the air entraining agent is selected from C6-C20Preferably selected from C10-C15More preferably one or more selected from the group consisting of sodium lauryl sulfate, potassium lauryl sulfate and sodium tetradecyl sulfate.
The air entraining agent of the invention is mainly used for introducing tiny air holes, improving workability, fluidity and improving frost resistance. In some embodiments of the invention, the air entraining agent is imported K12 (sodium lauryl sulfate) powder, white to yellowish powder, with > 95% active, pH 9.5-11 (1% active in water).
According to some embodiments of the invention, the foam stabilizer is selected from one or more of stearates, preferably from one or more of calcium stearate, magnesium stearate and zinc stearate, e.g. domestic calcium stearate with a purity > 99%.
According to some embodiments of the present invention, the inorganic pigment is selected from one or more of titanium white, chrome yellow, iron blue, cadmium red and carbon black, and different inorganic pigments can be selected to be added into the salt coating composition according to the actual decoration requirement, for example, titanium white is selected, the corresponding material is white, chrome yellow is selected, and the like, and meanwhile, the salt coating composition with more abundant colors can be prepared by controlling the addition amount of the two corresponding inorganic pigments.
The source of the water in the salt coat composition is not particularly limited in the present invention, and the source may be, for example, industrial tap water or the like.
The salt coating composition provided by the invention uses salt particles to replace sand as fine aggregate, uses salt powder to replace traditional cement and sierozem powder as cementing materials, fully utilizes the sterilization and disinfection characteristics of salt, simultaneously uses hydroxyethyl cellulose as a water-retaining agent, and the hydroxyethyl cellulose has good compatibility, can be dissolved with most inorganic salts, has excellent antibiotic degradability, is not easy to age and yellow, has stable viscosity reproducibility and less content of insoluble substances, and has clear and transparent aqueous solution, and the self color of the salt coating composition can not be influenced. In addition, the performance of workability, strength, hardness, workability, sag resistance and the like, appearance and the like of the salt clothes for buildings are effectively improved and adjusted by introducing additives (thickening agents, air entraining agents, foam stabilizers, inorganic pigments and the like).
According to some embodiments of the present invention, the amount of salt particles is 40 to 99%, preferably 50 to 99%, and more preferably 80 to 99%, based on the total weight of the composition.
According to some embodiments of the present invention, in the salt coating composition, the salt particle is 500-1500 parts by weight, the salt powder is 0-200 parts by weight, the water is 50-300 parts by weight, the water retention agent is 0-30 parts by weight, the thickening agent is 0-1 part by weight, the air entraining agent is 0-0.05 part by weight, and the foam stabilizer is 0-20 parts by weight.
According to some embodiments of the present invention, in the salt coating composition, the salt particle is 800-1200 parts by weight, the salt powder is 0-150 parts by weight, the water is 100-250 parts by weight, the water retention agent is 1-20 parts by weight, the thickening agent is 0.01-0.5 part by weight, the air entraining agent is 0.01-0.04 part by weight, and the foam stabilizer is 5-15 parts by weight.
According to some embodiments of the present invention, in the salt slurry composition, by weight, the salt particle is 100 parts of 900-.
According to some embodiments of the invention, the salt coat composition comprises 50-99% of salt granules, 0-20% of salt powder, 0-3% of water retention agent, 0-0.1% of thickening agent, 0-0.01% of air entraining agent and 0-2% of foam stabilizer by mass percentage.
According to some embodiments of the present invention, the salt coating composition comprises, by mass, 60 to 99% of salt granules, 0 to 15% of salt powder, 0.1 to 2% of a water retention agent, 0.005 to 0.03% of a thickening agent, 0.001 to 0.003% of an air entraining agent, and 0.1 to 1.5% of a foam stabilizer.
According to some embodiments of the invention, the salt coating composition comprises, in mass percent, 80-99% of salt granules, 0-10% of salt powder, 0.3-1.5% of a water retaining agent, 0.01-0.02% of a thickening agent, 0.005-0.0015% of an air entraining agent, and 0.5-1.1% of a foam stabilizer.
According to a second aspect, the present invention provides a salt slurry for construction, comprising the salt coating composition and water.
According to some embodiments of the invention, the salt slurry for construction according to the invention has a mass ratio of the salt coating composition to water of (1-20):1, preferably (5-10): 1.
In some embodiments of the present invention, it is preferred to prepare the construction salt slurry according to the following method:
1) starting a dry powder mixer;
2) firstly, putting salt granules and salt powder with the formula ratio into a dry powder mixer, and stirring for 2-3 min;
3) then adding the auxiliary agent with the formula amount into a dry powder mixer, and continuously stirring for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding water with a quantity equal to half of the formula amount, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, adding the residual water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building inner wall.
According to a third aspect, the present invention provides the use of the aforementioned salt coating composition or salt slurry for construction in the field of construction materials, in particular in interior wall materials.
According to some embodiments of the present invention, the application method of the salt slurry for construction comprises the following steps:
1) pre-wetting the inner wall surface to a surface layer wet state by using a water sprayer;
2) scraping and coating the fresh slurry of the functional salt slurry for the building inner wall on the inner wall by using tools such as a scraper and the like, wherein the thickness of the salt slurry can be controlled to be 5-30mm according to requirements, and the surface shape of the salt slurry can be molded according to requirements;
3) and after natural drying, finishing the construction of the salt slurry.
Compared with the prior art, the salt slurry for the building provided by the invention has the main advantages that:
1. the invention utilizes the characteristics of sterilization, disinfection, purification, humidity regulation and the like of salt to realize the functionalization of the building inner wall, is beneficial to the promotion of salt therapy treatment, improves the living environment, improves the health level of residents and conforms to the aims of sustainable development and ecological civilized construction.
2. Compared with the traditional plastering mortar and putty for interior walls, the building salt slurry has glittering and translucent apparent gloss, greatly improves the plasticity in slurry form, can form various shapes, has excellent polishing performance after being condensed and dried, and can be used for manufacturing different texture patterns.
3. The invention can replace the traditional plastering mortar and putty for building interior walls, has stable performance and can be stored for a long time; the building mortar has the advantages of low raw material cost, wide sources and easy popularization in the market, effectively improves and adjusts the performances of workability, strength, hardness, workability, sag resistance and the like, appearance and the like of the building mortar, and is an energy-saving, environment-friendly, comfortable and harmonious green ecological building material.
Detailed Description
Hereinafter, the present invention will be described with reference to examples. Table 1 below shows the composition of components of examples 1 to 16 according to the present invention, and table 2 shows the results of performance tests of examples 1 to 16 and comparative examples.
Reagent for experiment
The fineness of the salt particles for the experiment is 20-50 meshes, and the main component is sodium chloride (the content is higher than 99%).
The fineness of the salt powder for the experiment is 250-325 meshes, and the main component is sodium chloride (the content is higher than 99%).
The water retention agent for the experiment is hydroxyethyl cellulose, and the Brookfield viscosity of a 1% concentration aqueous solution is 2601-3400mpa & s.
The experimental thickener was modified starch ether 301, Aviebel (AVEBE) in the netherlands under the designation cassol 301.
The experimental air entraining agent was imported K12 (sodium lauryl sulfate) powder, white to yellowish powder, with > 95% active content, pH 9.5-11 (1% active in water).
The foam stabilizer for the experiment is domestic calcium stearate, and the purity is more than 99 percent.
Example 1
The preparation method of the functional salt slurry for the building inner wall comprises the following steps:
1) starting a dry powder mixer;
2) firstly, putting 1000 parts by weight of salt granules into a dry powder mixer, and stirring for 2-3 min;
3) then putting 15 parts by weight of water-retaining agent, 0.1 part by weight of thickening agent, 0.01 part by weight of air entraining agent and 10 parts by weight of foam stabilizer into a dry powder mixer, and continuing stirring for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding 60 parts by weight of water, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, putting the residual 60 parts by weight of water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building interior wall.
Example 2
The preparation method of the functional salt slurry for the building inner wall comprises the following steps:
1) starting a dry powder mixer;
2) firstly, putting 980 parts by weight of salt granules and 20 parts by weight of salt powder into a dry powder mixer, and stirring for 2-3 min;
3) then putting 13.5 parts by weight of water-retaining agent, 0.1 part by weight of thickening agent, 0.01 part by weight of air entraining agent and 10 parts by weight of foam stabilizer into a dry powder mixer, and continuously stirring for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding 60 parts by weight of water, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, putting the residual 60 parts by weight of water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building interior wall.
Example 3
The preparation method of the functional salt slurry for the building inner wall comprises the following steps:
1) starting a dry powder mixer;
2) firstly, 960 parts by weight of salt granules and 40 parts by weight of salt powder are put into a dry powder mixer and stirred for 2-3 min;
3) then putting 11 parts by weight of water-retaining agent, 0.2 part by weight of thickening agent, 0.01 part by weight of air entraining agent and 10 parts by weight of foam stabilizer into a dry powder mixer, and continuing stirring for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding 70 parts by weight of water, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, putting the rest 70 parts by weight of water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building interior wall.
Example 4
The preparation method of the functional salt slurry for the building inner wall comprises the following steps:
1) starting a dry powder mixer;
2) firstly, putting 940 parts by weight of salt granules and 60 parts by weight of salt powder into a dry powder mixer, and stirring for 2-3 min;
3) then putting 10.5 parts by weight of water-retaining agent, 0.2 part by weight of thickening agent, 0.01 part by weight of air entraining agent and 10 parts by weight of foam stabilizer into a dry powder mixer, and continuously stirring for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding 80 parts by weight of water, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, putting the rest 80 parts by weight of water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building interior wall.
Example 5
The preparation method of the functional salt slurry for the building inner wall comprises the following steps:
1) starting a dry powder mixer;
2) firstly, adding 920 parts by weight of salt granules and 80 parts by weight of salt powder into a dry powder mixer, and stirring for 2-3 min;
3) then putting 8 parts by weight of water-retaining agent, 0.2 part by weight of thickening agent, 0.01 part by weight of air entraining agent and 10 parts by weight of foam stabilizer into a dry powder mixer, and continuing stirring for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding 90 parts by weight of water, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, putting the rest 90 parts by weight of water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building interior wall.
Example 6
The preparation method of the functional salt slurry for the building inner wall comprises the following steps:
1) starting a dry powder mixer;
2) firstly, putting 900 parts by weight of salt granules and 100 parts by weight of salt powder into a dry powder mixer, and stirring for 2-3 min;
3) then 5 parts by weight of water-retaining agent, 0.2 part by weight of thickening agent, 0.01 part by weight of air entraining agent and 10 parts by weight of foam stabilizer are put into a dry powder mixer and continuously stirred for 2-3 min;
4) then putting the uniformly mixed powder into a mortar stirrer, adding 100 parts by weight of water, starting the mortar stirrer, and stirring for 1-2 min;
5) and standing for 1min, putting the rest 100 parts by weight of water into a mortar stirrer, continuously stirring for 2-4min, and discharging to obtain a mixture, namely the fresh slurry of the functional salt slurry for the building interior wall.
Example 7
Except for 8 parts by weight of the water retaining agent, as compared with example 1.
Example 8
Except for the difference from example 1 that the water retaining agent was 10 parts by weight.
Example 9
Except for the difference from example 1 that the water retaining agent was 12 parts by weight.
Example 10
Except for the difference from example 1 that the water retaining agent was 14 parts by weight.
Example 11
Except for the difference from example 1 that the water retaining agent was 16 parts by weight.
Example 12
Except for example 1, the water retaining agent was 18 parts by weight.
Example 13
Except for the difference from example 6 that the water retaining agent was 3 parts by weight.
Example 14
Except for the difference from example 6 that the water retaining agent was 4 parts by weight.
Example 15
Except for the difference from example 6, the water retaining agent was 6 parts by weight.
Example 16
Except for the difference from example 6 that the water retaining agent was 7 parts by weight.
TABLE 1 quality percentages of the components of examples 1-16
| Numbering | Salt granule | Salt powder | Water-retaining agent | Thickening agent | Air entraining agent | Foam stabilizer |
| Example 1 | 97.55％ | 0 | 1.46％ | 0.01％ | 0.001％ | 0.98％ |
| Example 2 | 95.74％ | 1.95％ | 1.32％ | 0.01％ | 0.001％ | 0.98％ |
| Example 3 | 94.01％ | 3.92％ | 1.08％ | 0.02％ | 0.001％ | 0.98％ |
| Example 4 | 92.09％ | 5.88％ | 1.03％ | 0.02％ | 0.001％ | 0.98％ |
| Example 5 | 90.35％ | 7.86％ | 0.79％ | 0.02％ | 0.001％ | 0.98％ |
| Example 6 | 88.65％ | 9.85％ | 0.49％ | 0.02％ | 0.001％ | 0.99％ |
| Example 7 | 98.22％ | 0 | 0.79％ | 0.01％ | 0.001％ | 0.98％ |
| Example 8 | 98.03％ | 0 | 0.98％ | 0.01％ | 0.001％ | 0.98％ |
| Example 9 | 97.84％ | 0 | 1.17％ | 0.01％ | 0.001％ | 0.98％ |
| Example 10 | 97.65％ | 0 | 1.37％ | 0.01％ | 0.001％ | 0.98％ |
| Example 11 | 97.46％ | 0 | 1.56％ | 0.01％ | 0.001％ | 0.97％ |
| Example 12 | 97.27％ | 0 | 1.75％ | 0.01％ | 0.001％ | 0.97％ |
| Example 13 | 88.83％ | 9.87％ | 0.30％ | 0.02％ | 0.001％ | 0.99％ |
| Example 14 | 88.74％ | 9.86％ | 0.39％ | 0.02％ | 0.001％ | 0.99％ |
| Example 15 | 88.56％ | 9.84％ | 0.59％ | 0.02％ | 0.001％ | 0.98％ |
| Example 16 | 88.48％ | 9.83％ | 0.69％ | 0.02％ | 0.001％ | 0.98％ |
One of the purposes of the invention is to replace the common plastering mortar and putty for interior walls, so M5 dry-mixed plastering mortar and general indoor putty are selected as comparison examples.
Comparative example 1
M5 dry-mixed plastering mortar:
the experimental cement mainly refers to P.O.42.5 portland cement.
The experimental sand mainly refers to medium sand.
The experimental cellulose ether is mainly produced by Longhu science and technology for increasing water retention. .
The K12 air entraining agent for experiments is mainly used for introducing tiny air holes, improving workability and fluidity and improving frost resistance.
Proportioning: 150 parts of P.O.42.5 Portland cement, 950 parts of sand, 0.1 part of cellulose ether, 0.01 part of K12 air entraining agent and 135 parts of water.
Performance reference standard: GBT2581 ready-mixed mortar and the like.
Comparative example 2
General indoor putty:
the heavy calcium powder for experiments is mainly calcium carbonate.
The main components of the ash calcium powder for experiments are calcium hydroxide mainly and a small amount of calcium oxide and calcium carbonate.
The experimental starch ether is 301 in type, mainly increases viscosity and improves sag resistance, produced by Longhu science and technology.
The experimental cellulose ether is mainly produced by Longhu science and technology for increasing water retention.
Proportioning: 697 parts of heavy calcium carbonate, 300 parts of ash calcium, 50 parts of heavy calcium carbonate, 0.5 part of starch ether (301) and 3 parts of cellulose ether.
Test example
According to the performance requirements of M5 dry-mixed plastering mortar in GB/T25181-2010 ready-mixed mortar and JGT 298-1020 construction indoor putty in the national standard, the control example and the embodiment are detected, and the specific performance requirement indexes and detection results are as follows:
table 2 results of performance test of examples 1 to 16 and comparative example
Compared with the M5 mortar of the comparative example 1, the material in the application has excellent water retention performance and excellent 2h consistency loss performance, hydroxyethyl cellulose plays an important role as a water retention agent, and simultaneously the 14d tensile bonding strength of the material is endowed, and the 14d bonding tensile strength is gradually increased along with the increase of the salt powder content. Since there is no chemical reaction like cement hydration in the system and the setting process of the slurry is only the evaporation of water, there is no volume shrinkage and the 28d shrinkage of the material is almost negligible.
Compared with the common indoor putty of the comparative example 2, the material has good construction performance, initial crack resistance and sanding performance, and benefits from good grain composition design, compound use of various additives and easy sanding performance of salt grains. On the other hand, the material is limited by the design requirement that the material has the salt therapy function, the material is a porous material, so the 14d tensile bonding strength is obviously lower than the national standard requirement of the putty, and simultaneously, along with the increase of the content of salt powder, a large amount of fine particles are dissolved to improve the water demand, thereby delaying the surface drying time and still being in the range of the national standard requirement of the putty. .
It should be noted that the above-mentioned embodiments are only for explaining the present invention, and do not set any limit to the present invention. The present invention has been described with reference to exemplary embodiments, but the words which have been used herein are words of description and illustration, rather than words of limitation. The invention can be modified, as prescribed, within the scope of the claims and without departing from the scope and spirit of the invention. Although the invention has been described herein with reference to particular means, materials and embodiments, the invention is not intended to be limited to the particulars disclosed herein, but rather extends to all other methods and applications having the same functionality.
Claims (9)
1. A salt coat composition for construction, which comprises salt granules and a water retention agent, and optionally salt powder.
2. Composition according to claim 1, characterized in that the fineness of the salt particles is 10-70 mesh, preferably 20-50 mesh; the fineness of the salt powder is 200-400 meshes, preferably 250-325 meshes; the water retaining agent is selected from one or more of cellulose ether, preferably from one or more of methyl cellulose, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose and carboxyethyl cellulose, and more preferably is hydroxyethyl cellulose; and/or
The mass ratio of the salt particles to the water-retaining agent is (50-150):1, preferably (60-90):1, more preferably (60-70): 1;
and/or the mass ratio of the sum of the mass of the salt powder and the salt particles to the mass of the water retention agent is (50-350):1, preferably (100- & ltSUB & gt 300) & ltSUB & gt 1, more preferably (150- & ltSUB & gt 250) & ltSUB & gt 1, and the mass ratio of the salt particles to the salt powder is (1-80):1, preferably (5-60) & ltSUB & gt 1, more preferably (6-50) & ltSUB & gt 1, and most preferably (7-12) & ltSUB & gt 1.
3. Composition according to claim 1 or 2, characterized in that the salt granules and the salt powders are respectively salt granules and salt powders of inorganic salts, preferably selected from alkali metal and alkaline earth metal salts, preferably the inorganic salts are selected from halides of alkali metal and alkaline earth metal, more preferably chlorides, most preferably sodium chloride.
4. The composition according to claim 3, wherein the alkali and/or alkaline earth metal salt is selected from one or more of sodium carbonate, sodium chloride, potassium chloride, sodium sulfate, calcium sulfate, potassium sulfate and calcium chloride.
5. The composition of any one of claims 1 to 4, further comprising an additive, preferably the additive comprises one or more of a thickening agent, an air entraining agent, a foam stabilizer and an inorganic pigment;
the thickening agent is selected from one or more of polyacrylamide, water-soluble starch and starch ether, preferably selected from one or more of modified starch ether, more preferably modified starch ether 301; and/or
The air entraining agent is selected from C6-C20Preferably selected from C10-C15More preferably one or more selected from the group consisting of sodium lauryl sulfate, potassium lauryl sulfate and sodium tetradecyl sulfate; and/or
The foam stabilizer is selected from one or more of stearate, preferably one or more of calcium stearate, magnesium stearate and zinc stearate; and/or
The inorganic pigment is selected from one or more of titanium white, chrome yellow, iron blue, cadmium red and carbon black.
6. Composition according to any one of claims 1 to 5, wherein the amount of salt particles is 40 to 99%, preferably 50 to 99%, and more preferably 80 to 99%, based on the total weight of the composition.
7. The composition according to any one of claims 1 to 6, which comprises 50 to 99 percent of salt particles, 0 to 20 percent of salt powder, 0 to 3 percent of water retention agent, 0 to 0.1 percent of thickening agent, 0 to 0.01 percent of air entraining agent and 0 to 2 percent of foam stabilizer;
preferably comprises 60 to 99 percent of salt particles, 0 to 15 percent of salt powder, 0.1 to 2 percent of water retention agent, 0.005 to 0.03 percent of thickening agent, 0.001 to 0.003 percent of air entraining agent and 0.1 to 1.5 percent of foam stabilizer;
more preferably 80-99% of salt granules, 0-10% of salt powder, 0.3-1.5% of water-retaining agent, 0.01-0.02% of thickening agent, 0.005-0.0015% of air-entraining agent and 0.5-1.1% of foam stabilizer.
8. A salt slurry for construction comprising a composition according to any one of claims 1 to 7 and water, preferably in a mass ratio of (1-20):1, more preferably (5-10): 1.
9. Use of a composition according to any one of claims 1 to 7 or of a construction salt paste according to claim 8 in the field of construction materials, in particular in interior wall materials and/or technical articles.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110526627A (en) * | 2019-06-17 | 2019-12-03 | 北京绿德康环保科技有限公司 | A kind of salt clothing composition for building and the preparation method and application thereof |
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