CN111268991A - Compound high-color-retention color decorative mortar - Google Patents
Compound high-color-retention color decorative mortar Download PDFInfo
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- CN111268991A CN111268991A CN202010160894.6A CN202010160894A CN111268991A CN 111268991 A CN111268991 A CN 111268991A CN 202010160894 A CN202010160894 A CN 202010160894A CN 111268991 A CN111268991 A CN 111268991A
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
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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
- 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
-
- 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
-
- 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
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/82—Coloured 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the field of building coatings, and provides a compound high color retention color decorative mortar which comprises, by weight, 10-12 parts of high-alumina cement, 5-7 parts of white cement, 5-7 parts of α high-strength gypsum, 3-4 parts of polyvinylidene fluoride resin powder, 0.1-0.2 part of a water repellent, 0.1-0.2 part of an alkali-resistant inhibitor, 0.2-0.3 part of hydroxypropyl methyl cellulose ether, 0.1-0.15 part of tartaric acid, 0.5-0.8 part of wood fiber, 5-10 parts of 200-mesh quartz powder, 45-50 parts of 70-140-mesh quartz sand and 10-20 parts of 40-70-mesh quartz sand.
Description
Technical Field
The invention belongs to the technical field of building coatings, and particularly relates to a decorative mortar, and more particularly relates to a compounded high-color-retention colored decorative mortar.
Technical Field
The color facing mortar is prepared by premixing and dry-mixing inorganic cementing materials, dispersible emulsion powder, aggregate, filler, toner and various additives. The interior of the water-repellent porous membrane is of a porous structure, the polymer components play a role in improving pores, small-molecule water vapor can freely pass through the water-repellent porous membrane, and large-molecule water cannot penetrate through the water-repellent porous membrane, so that the water-repellent porous membrane has water repellency and breathability. And the decorative coating has good physical properties, excellent durability, simple and natural and rich and colorful decorative effects, and is the perfect combination of decoration and protection.
Patent CN107555883A discloses a preparation method of weather-resistant decorative color mortar, which mainly utilizes a good weather-resistant acrylic color pigment powder to enhance the weather resistance of the decorative mortar. However, the mortar has no function of inhibiting alkali reversion, and because cement has the problem of later alkali reversion, a layer of white frost is formed on the surface of the mortar, so that the color display of the color decorative mortar is influenced, and further, the color retention is not good; in addition, the pigment of the color decorative mortar is generally an iron oxide inorganic pigment, and the pigment has the characteristic of good weather resistance. Patent CN109294347A discloses a high color retention water-based paint and a preparation method thereof, which mainly utilizes potassium silicate and polyvinylidene fluoride emulsion to improve the weather resistance of the water-based paint, but the method is not utilized in color decorative mortar. Therefore, the development of color mortar focuses on how to inhibit the alkali return of mortar and improve the coating of pigment with the weather-resistant organic component in the mortar.
The problems that the color decoration mortar in the prior art is poor in weather resistance, easy in alkali return and easy in color fading are insurmountable. Common latex paints also suffer from discoloration due to poor weatherability of the emulsion. Therefore, the production of the decorative mortar with high color retention and super weather resistance is needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the compounded high color-retention color decorative mortar which has the characteristics of high color retention, no alkali reversion and good weather resistance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a compound high color retention color decorative mortar, which comprises the following components, by weight, 10-12 parts of high-alumina cement, 5-7 parts of white cement, 5-7 parts of α high-strength gypsum, 3-4 parts of polyvinylidene fluoride resin powder, 0.1-0.2 part of a water repellent, 0.1-0.2 part of an alkali-resistant inhibitor, 0.2-0.3 part of hydroxypropyl methyl cellulose ether, 0.1-0.15 part of tartaric acid, 0.5-0.8 part of wood fiber, 5-10 parts of 200-mesh quartz powder, 45-50 parts of 70-140-mesh quartz sand and 10-20 parts of 40-70-mesh quartz sand.
Preferably, the aluminous cement is a kenostis Ternal White. The high-alumina cement is a hydraulic cementing material which is prepared by melting or sintering bauxite and limestone serving as raw materials to prepare clinker taking monocalcium aluminate and dicalcium aluminate as main composition phases and grinding the clinker, and has the characteristics of quick drying, high strength and low alkali. The Ternal White high-alumina cement has extremely low content of soluble impurities, special microstructure and hydration products, so that the fading soluble salt caused by precipitation can not be precipitated on the surface of the mortar. Furthermore, no Ca (OH) is formed due to hydration of the Ternal White-based gelling material2And thus there is no risk of forming calcareous alkali return. Moreover, the quick drying property of Ternal White is helpful to reduce or even prevent soluble salts in the matrix from dissolving into water, thereby greatly reducing the risk of surface precipitation.
Preferably, the white cement is 32.5 white portland cement. The ordinary portland cement is hydraulic cementing material prepared by grinding portland cement clinker, 6-15% of mixed material and a proper amount of gypsum, and the hydration by-product contains Ca (OH)2. Under certain conditions Ca (OH)2Will migrate to the surface of the mortar and react with carbon dioxide in the air to generate white crystals, namely efflorescence, and simultaneously other soluble salts migrate to the surface and also form white 'efflorescence'. Because of the hydrated calcium aluminate system generated by the hydration of the pure high-alumina cement, the crystal form is thick and the pore space is large, the water resistance of the mortar is poor. The ordinary silica cement system has different performances and lower initial strength, and once the cement is hydrated, the water-resistant strength is higher and higher, and the performance is that the cement is firstly soft and then hard. Therefore, the aluminate and the silicate are used in a compounding way, so that the formation of metastable hydration products can be reduced or avoided as much as possible, and the problems of strength shrinkage and poor water resistance of the pure high-alumina cement are solved.
Preferably, the α high-strength gypsum is α type hemihydrate gypsum, which is an inorganic air-hardening cementitious material consisting essentially of calcium sulfate as a single mineral, α type hemihydrate gypsum isGenerated under pressurized steam conditions or when heated in a solution of an acid and a salt, the water requirement is small when a slurry with a certain consistency is prepared, and the strength is high after hardening. Gypsum plays two key roles in the ternary cementitious system: firstly, gypsum replaces part of the cement, so that the components capable of generating whiskering are reduced; secondly, the gypsum can react with aluminate cement and silicate cement to generate ettringite, and Ca (OH) generated by hydration of the silicate cement is consumed2Thereby reducing the content of efflorescence.
Preferably, the polyvinylidene fluoride resin powder is a novel fluorine-containing resin powder. Polyvinylidene fluoride is a semi-crystalline polymer in normal state and has a crystallinity of about 50%. The paint has the outstanding characteristics of high mechanical strength, good weather resistance, strong chemical corrosion resistance and the like. The coating is widely applied to places with harsh outdoor conditions and high weather resistance requirements. The polyvinylidene fluoride resin powder replaces the common acrylic resin powder, the super-strong weather resistance, excellent chemical corrosion resistance and high color-retention oxidation resistance of the polyvinylidene fluoride are introduced into the decorative mortar, and the problem of color fading caused by poor weather resistance of the common resin powder is solved.
The polyvinylidene fluoride resin powder is water-soluble powder and has good stirring performance. After redispersion, partial free calcium ions can be complexed, the polymer film wraps the mortar particles and is filled in gaps of the cement mortar, so that the effect of reducing the porosity of the mortar is achieved, the water absorption of the mortar is reduced, the impermeability of the mortar is improved, and the inhibition effect on primary saltpetering and secondary saltpetering of the cement-based facing mortar is realized. Meanwhile, the resin powder can improve the bonding strength of the cement-based facing mortar, and improve the toughness, the deformability, the crack resistance and the like.
Preferably, the water repellent is polysiloxane. In the high-alkaline environment after cement hydration, hydrophilic organic functional groups in the silane water repellent are hydrolyzed to form silanol groups with high reaction activity, and the silanol groups and hydroxyl groups in cement hydration products are subjected to irreversible reaction to form chemical combination, so that the silane connected together through the crosslinking effect is firmly fixed on the surface of the hole wall in the mortar. The hydrophobic organic functional groups face to the outer side of the hole wall, so that the surfaces of the holes are hydrophobic, and the hydrophobic effect of the facing mortar is achieved. One of the conditions due to efflorescence is the presence of carrier water in the material required for the migration of soluble salts to the surface. The hydrophobicity of the surface of the mortar can reduce the migration of some soluble salts on the surface in the early stage of the drying of the mortar, and can also prevent external moisture from permeating into the mortar in the later stage of the drying of the mortar, thereby avoiding the path of migrating the soluble salts to the surface and reducing the occurrence of alkali return.
Preferably, the alkali-resistant inhibitor is a powdery high-activity whiskering-inhibiting additive. The alkali-resistant inhibitor is a high-activity resin-based anti-efflorescence additive, and is redispersible powder with good stirring performance. After being dissolved in the mortar, the mortar can form small particles with the size of several microns, and the small particles can close gaps and better fill capillary pores in the mortar, improve the impermeability of the mortar and reduce water migration. In addition, it has bound free Ca2+The cement-based facing mortar has the potential of not generating a retarding effect on the hydration of cement, thereby realizing the inhibiting effect on primary saltpetering and secondary saltpetering of the cement-based facing mortar.
Preferably, the viscosity of the hydroxypropyl methyl cellulose ether is 3000-10000 mPa.s; the length of the wood fiber is 500 mu m.
The invention utilizes a ternary gelling system which takes high-alumina cement as a main component and takes white cement and α high-strength gypsum as an auxiliary component, the ternary system has the advantages that the calcium vanadine hydrate is quickly formed, the excessive volatilization of water is avoided, when the aluminate cement is taken as the main component, the formation amount of the calcium vanadine is more, the effect is best, the microstructure in the mortar is compact, the water absorption is low, and the ordinary silica cement is completely used for forming the calcium vanadine at the moment, and Ca (OH) can not be generated2. In addition, the rapid hydration of the cementing material into the ettringite can rapidly and uniformly consume the moisture of the mortar, and avoid mortar color difference caused by uneven drying of the mortar due to environmental change, so the efflorescence and whitening resistance effect is optimal. In addition, the invention utilizes the characteristics of chemical corrosion resistance, excellent high-temperature color change resistance and oxidation resistance of polyvinylidene fluoride, and can well coat the toner in the mortar so as to avoid ultraviolet rays and the mortarThe color retention of the decorative mortar is further improved due to the damage of the alkaline substances on the surface to the toner.
Drawings
FIG. 1 is a schematic diagram showing the comparative example and comparative example in terms of the alkali-efflorescence resistance;
FIG. 2 is a comparison of color retention for examples and comparative examples.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification.
Example 1
The components are weighed according to the following weight portions of 10 portions of high alumina cement, 5 portions of white cement, 5 portions of α high-strength gypsum, 3 portions of polyvinylidene fluoride resin powder, 0.1 portion of water repellent, 0.1 portion of alkali-resistant inhibitor, 0.2 portion of hydroxypropyl methyl cellulose ether, 0.1 portion of tartaric acid, 0.5 portion of wood fiber, 5 portions of 200-mesh quartz powder, 50 portions of 70-140-mesh quartz sand and 21 portions of 40-70-mesh quartz sand.
Example 2
The components are weighed according to the following parts by weight, 12 parts of high alumina cement, 7 parts of white cement, 7 parts of α high-strength gypsum, 4 parts of polyvinylidene fluoride resin powder, 0.2 part of water repellent, 0.2 part of alkali-resistant inhibitor, 0.3 part of hydroxypropyl methyl cellulose ether, 0.15 part of tartaric acid, 0.8 part of wood fiber, 10 parts of 200-mesh quartz powder, 45 parts of 70-140-mesh quartz sand and 13.35 parts of 40-70-mesh quartz sand.
Comparative example 1
Compared with the embodiment 2, the polyvinylidene fluoride resin powder is replaced by vinylase/vinyl resin glue powder, namely 12 parts of high alumina cement, 7 parts of white cement, 7 parts of α high-strength gypsum, 4 parts of vinylase/vinyl resin glue powder, 0.2 part of water repellent, 0.2 part of alkali-resistant inhibitor, 0.3 part of hydroxypropyl methyl cellulose ether, 0.15 part of tartaric acid, 0.8 part of wood fiber, 10 parts of 200-mesh quartz powder, 45 parts of 70-140-mesh quartz sand and 13.35 parts of 40-70-mesh quartz sand.
Comparative example 2
Compared with the embodiment 1, α high-strength gypsum is replaced by white cement, namely 10 parts of high-alumina cement, 10 parts of white cement, 3 parts of polyvinylidene fluoride resin powder, 0.1 part of water repellent, 0.1 part of alkali-resistant inhibitor, 0.2 part of hydroxypropyl methyl cellulose ether, 0.1 part of tartaric acid, 0.5 part of wood fiber, 5 parts of 200-mesh quartz powder, 50 parts of 70-140-mesh quartz sand and 21 parts of 40-70-mesh quartz sand.
The detection means is as follows:
(1) alkali return resistance: the reversion property was tested according to JC/T1024-2007 standard.
(2) Color retention: the color decorative mortar is constructed on an outdoor cement wall, placed outdoors for 6 months, and the color stability is observed.
The results of the anti-reversion properties are shown in FIG. 1. It can be seen from the figure that the ternary gelling system adopted in the example is obviously better than the alkali-return-resistant performance of the comparative example 2 (the alkali-return degree is evaluated according to the size of the whitish area), and the ternary system has the advantages of rapid formation of ettringite hydrate and being helpful for avoiding excessive volatilization of water. When aluminate cement is taken as the main material, the formation amount of ettringite is large, the effect is best, and the ordinary silica cement is completely used for forming ettringite at the moment, Ca (OH) is not generated2. In addition, the microstructure of the mortar is denser, so that the efflorescence and whitening resistance effect is optimal.
The color retention result is shown in fig. 2, it can be seen from the graph that after the color decorative mortar is constructed on the wall surface for 6 months, the color retention of the embodiment is far better than that of the comparative example, which is related to the performance of the ternary gelling system with high alumina cement as the main component and white cement and α high-strength gypsum as the auxiliary component for inhibiting alkali reversion, and is related to the addition of polyvinylidene fluoride resin powder with good weather resistance into the dry powder mortar, and the polyvinylidene fluoride resin powder can well coat the toner so as to avoid the damage of ultraviolet rays and alkaline substances in the mortar to the toner, so that the color can be retained for a long time.
The performance indexes of the high color retention color decoration mortar are as follows:
the foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The compound high-color-retention color decorative mortar is characterized by comprising, by weight, 10-12 parts of high-alumina cement, 5-7 parts of white cement, 5-7 parts of α high-strength gypsum, 3-4 parts of polyvinylidene fluoride resin powder, 0.1-0.2 part of a water repellent, 0.1-0.2 part of an alkali-resistant inhibitor, 0.2-0.3 part of hydroxypropyl methyl cellulose ether, 0.1-0.15 part of tartaric acid, 0.5-0.8 part of wood fiber, 5-10 parts of 200-mesh quartz powder, 45-50 parts of 70-140-mesh quartz sand and 10-20 parts of 40-70-mesh quartz sand.
2. The compound high color-retention color decoration mortar of claim 1, wherein the high alumina cement is aluminate cement.
3. The compound high color-retention color decorative mortar according to claim 1, wherein the white cement is 32.5 white Portland cement.
4. The compound high color-retention color decoration mortar of claim 1, wherein the α high-strength gypsum is α type hemihydrate gypsum.
5. The compound high color-retention color decorative mortar according to claim 1, wherein the polyvinylidene fluoride resin powder is a novel fluorine-containing resin powder.
6. The compound high color-retention color decoration mortar of claim 1, wherein the water repellent is polysiloxane.
7. The compound high color-retention color decoration mortar of claim 1, wherein the alkali-resistant inhibitor is a powdery high-activity whiskering-inhibiting additive.
8. The composite color-retaining color decoration mortar as claimed in claim 1, wherein the viscosity of the hydroxypropyl methyl cellulose ether is 3000-10000 mPa.s.
9. The compound high color-retention color decoration mortar of claim 1, wherein the wood fiber length is 500 μm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995344A (en) * | 2020-08-26 | 2020-11-27 | 亚士创能科技（滁州）有限公司 | Decorative mortar and application thereof |
| CN112266224A (en) * | 2020-10-30 | 2021-01-26 | 三棵树(上海)新材料研究有限公司 | Anti-efflorescence inorganic rammed earth wall material and preparation method thereof |
| CN112341125A (en) * | 2020-11-30 | 2021-02-09 | 东阳市琰安建筑工程有限公司 | Preparation method of anti-whiskering cement color decoration mortar |
| CN112661459A (en) * | 2020-12-25 | 2021-04-16 | 亚士创能科技(上海)股份有限公司 | Preparation method of bi-component mortar, coating and heat insulation system |
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| CN106587883A (en) * | 2016-12-29 | 2017-04-26 | 中民筑友科技投资有限公司 | Architectural decoration mortar and application thereof |
| CN107955472A (en) * | 2017-11-24 | 2018-04-24 | 科顺防水科技股份有限公司 | A kind of organo-mineral complexing decoration waterproof integrated coating of alkali resistant and preparation method thereof |
| CN109294347A (en) * | 2018-09-03 | 2019-02-01 | 陈威 | A kind of Gao Baose water paint and production method |
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2020
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995344A (en) * | 2020-08-26 | 2020-11-27 | 亚士创能科技（滁州）有限公司 | Decorative mortar and application thereof |
| CN111995344B (en) * | 2020-08-26 | 2022-05-27 | 亚士创能科技（滁州）有限公司 | Decorative mortar and application thereof |
| CN112266224A (en) * | 2020-10-30 | 2021-01-26 | 三棵树(上海)新材料研究有限公司 | Anti-efflorescence inorganic rammed earth wall material and preparation method thereof |
| CN112341125A (en) * | 2020-11-30 | 2021-02-09 | 东阳市琰安建筑工程有限公司 | Preparation method of anti-whiskering cement color decoration mortar |
| CN112341125B (en) * | 2020-11-30 | 2022-09-09 | 贵州正和天筑科技有限公司 | A kind of preparation method of efflorescence-resistant cement color decorative mortar |
| CN112661459A (en) * | 2020-12-25 | 2021-04-16 | 亚士创能科技(上海)股份有限公司 | Preparation method of bi-component mortar, coating and heat insulation system |
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Application publication date: 20200612 |
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