CN112411910A - Construction method for creating clear water effect on concrete base surface - Google Patents
Construction method for creating clear water effect on concrete base surface Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention relates to a construction method for creating a clear water effect on a concrete base surface, which comprises the following steps: step 1: coating a concrete base surface by adopting a nano modified silicate permeable crystallization material; step 2: coating the coloring slurry on a concrete base surface to cover the concrete base surface and/or form surface textures, wherein the coloring slurry is prepared by stirring cement-based inorganic powder and a binder and adding an inorganic pigment for color matching; and step 3: after the coloring slurry is dried, the nano modified silicate permeable crystallization material is adopted for surface coating. The nano modified silicate permeable crystallization material comprises, by mass, 5-30 parts of sodium silicate, 5-20 parts of potassium silicate, 0.05-0.5 part of surfactant, 0.1-1 part of reaction retarder, 0.1-0.5 part of reducing agent, 0.1-2 parts of reaction promoter, 0.01-0.5 part of anti-freezing agent, 0.1-1 part of metal ion locking agent, 0.1-1 part of surface enhancer, 0.1-0.5 part of antirust agent and 40-70 parts of deionized water. The invention has lasting protection effect on concrete, can be particularly applied to the outdoor roof surface part of a concrete building, and can maintain the clear water decoration effect for a long time.
Description
Technical Field
The invention relates to a construction method, in particular to a construction method for creating a clear water effect on a concrete base surface.
Background
The fair-faced concrete and the fair-faced formwork are expression techniques of modern architecture, and are also called decorative concrete due to the extremely good decorative effect. The original concrete texture is kept, and the method is of direct significance for the fair-faced concrete. Grey is the dominant hue of fair-faced concrete, but irregular textures, and uncertain decorations are the true meanings of fair-faced concrete. As for domestic construction and development factors, most of the fair-faced concrete is not good in effect after being poured and formed, and meanwhile, most of domestic fair-faced concrete pouring people do not have the concept of protecting concrete.
The imitation fair-faced concrete paint and the imitation fair-faced concrete coating are the two kinds of imitation fair-faced concrete which are most mentioned at present, and are made by some coating manufacturers in combination with the requirement of the market for the fair-faced concrete protective agent at present. However, the imitation fair-faced concrete coating is good, the imitation fair-faced concrete paint is good, and the surface of the finished fair-faced concrete is not real fair-faced concrete and even cannot be similar to the surface of the imitation fair-faced concrete. Most of these coatings are film-forming, and form a coating film on concrete or other substrates after use, and the coating film is weathered, aged and peeled off with time, and finally the finished product is peeled off, so that the decorative effect of the coating film cannot be maintained for a long time. For example, the existing common materials such as acrylic emulsion, fluorocarbon transparent paint and the like have low construction efficiency, form an airtight film on the surface, inhibit the outward diffusion of harmful water vapor in concrete, are easy to delaminate and crack for a long time (outdoors), and have poor durability.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the invention provides a construction method for creating a fair-faced effect on a concrete base surface, which solves the problem that the existing fair-faced concrete imitation paint or the fair-faced concrete imitation paint is easy to age, peel and fall off and cannot maintain the fair-faced decoration effect for a long time.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
in a first aspect, the present invention provides a construction method for creating a fresh water effect on a concrete base surface, comprising:
step 1, coating a base surface by adopting a nano modified silicate permeable crystallization material;
step 2, coating coloring slurry on the concrete base surface to cover the concrete base surface and/or form surface textures, wherein the coloring slurry is prepared by stirring cement-based inorganic powder and a binder and adding an inorganic pigment for color matching;
step 3, after the coloring slurry is dried, performing finish coating by adopting a nano modified silicate permeable crystallization material, and completing construction after drying;
in step 1 and step 3, the nano-modified silicate permeable crystalline material comprises the following components: 5-30 parts of sodium silicate, 5-20 parts of potassium silicate, 0.05-0.5 part of surfactant, 0.1-1 part of reaction retarder, 0.1-0.5 part of reducing agent, 0.1-2 parts of reaction accelerator, 0.01-0.5 part of anti-freezing agent, 0.1-1 part of metal ion locking agent, 0.1-1 part of surface reinforcer, 0.1-0.5 part of antirust agent and 40-70 parts of deionized water.
According to the preferred embodiment of the present invention, the concrete base surface with quality problems such as color difference, pothole and crack further comprises a repairing step before step 1: and (3) repairing the depression or the large crack of the concrete base surface by using repair mortar (preferably high-strength repair mortar which is concrete mortar with the strength of more than C40 after solidification), and grouting by using inorganic or organic materials to repair the fine crack. The fine cracks herein are mainly cracks having a crack width of 4mm or less in high-strength concrete. For ordinary concrete, the fine cracks mainly mean cracks of 8mm or less.
According to a preferred embodiment of the present invention, the concrete base is cleaned of dust and dirt prior to the repair step, and the base is kept clear of water.
According to the preferred embodiment of the invention, the material for grouting repair of the micro-cracks or the ultra-fine cracks is one or more of a solid inorganic powder infiltration crystalline material, an epoxy resin, a polyurea resin, a polyurethane and an acrylate emulsion cement-based infiltration crystalline waterproof material.
According to a preferred embodiment of the present invention, in step 1, the particle size of the active particles in the nano-modified silicate permeable crystallization material is 3 to 30nm, the viscosity of the material is 0.8 to 1.05MPa.S, and the density is 1.01 to 1.08g/cm3The pH value is more than or equal to 11.
The active particulate matter in the nano modified silicate osmotic crystal material mainly refers to silicate particles suspended in a liquid phase, the silicate particles are active particulate matters formed by water-soluble silicate (potassium silicate and sodium silicate) under the action of various assistants, and are main components which mainly participate in the reaction of cement-based inorganic powder on a concrete plain surface and forming textures to generate C-S-H gel and crystals. Since the silicate particles tend to generate silica when the pH is close to neutral or acidic, the pH of the nano-modified silicate material is preferably adjusted to 11 or more, more preferably 12 or more, by using a pH adjuster in order to stabilize the nano-modified silicate material.
According to the preferred embodiment of the invention, in the step 1, coating is carried out by adopting a spraying mode; preferably, the spraying amount is 100mL-250mL/m2And the concrete is penetrated to a depth of more than 4cm of the base surface of the concrete (the penetration depth can be measured by adopting a slicing detection element mode).
According to the preferred embodiment of the present invention, in step 1, the nano modified silicate permeable crystallization material is completely sprayed, and is left for more than 20min (preferably 30-60min), and then step 2 is performed.
According to a preferred embodiment of the present invention, in the step 2, when preparing the coloring slurry, the inorganic powder includes cement (one or a combination of several of ultra-fine portland cement, high belite cement, and ultra-fine phosphate cement), nano titanium dioxide (anatase type or rutile type), nano calcium carbonate (200-400 nm), and ultra-fine silica (180-200 m in the ratio table)2G) nano oxidationCalcium, silica fume, inorganic pigments (selected according to toning requirements, and commonly used inorganic pigments are black, yellow and red); when the coloring slurry is prepared, the adhesive comprises any one or more of EVA emulsion, acrylate emulsion, silicone-acrylic emulsion and styrene-acrylic emulsion, and the weight ratio of water: adhesive agent: the mass ratio of the inorganic powder is 1-1.5: 1: 3 to 4.
According to the preferred embodiment of the invention, in step 2, the coloring slurry suitable for covering the concrete base surface (the color is adjusted to be close to the concrete plain surface by using the coloring material) is coated on the concrete base surface by a roller or the like in a thickness of 0.2-0.5mm so as to cover the concrete base surface; and then according to the actual design requirements, preparing the coloring slurry with different colors and shades (when preparing the coloring slurry, the colors and shades of the coloring slurry can be adjusted by adding water for dilution or reducing water, adding white nano calcium carbonate, adding black iron oxide and the like so as to adapt to different purposes), and performing roller coating on the coloring slurry with different colors and shades by adopting a special-shaped roller so as to form irregular natural-imitated textures.
According to a preferred embodiment of the present invention, after step 2 is completed, the slurry is left for more than 2 hours (preferably 2-4 hours), and after the slurry is dried, step 3 is performed, that is: and spraying the nano modified silicate permeable crystallization material on the surface of the coloring slurry to be used as a cover surface protective agent.
According to a preferred embodiment of the present invention, in step 3, the particle size of the active particles in the nano-modified silicate permeable crystallization material is 30 to 50nm, the viscosity of the material is 0.9 to 1.08MPa.S, and the density is 1.03 to 1.10g/cm3The pH value is more than or equal to 11.
(III) advantageous effects
The beneficial technical effects of the invention comprise:
(1) after the construction method is used for construction, the concrete wall surface is waterproof, waterproof and ultraviolet-resistant, and can be particularly applied to the clear water effect construction of indoor and outdoor oblique vertical surfaces, indoor and outdoor roof surfaces and other parts (the existing materials can not be used for outdoor roofs generally) of concrete buildings and the lasting protection of plain concrete base surfaces.
Both roller coating and spraying are adopted during construction, the requirements on the surface of the concrete base material are low, the surface is wet,construction can be carried out by avoiding open water, and the interval time of each procedure is short. The construction process comprises the steps of firstly coating a layer of nano modified silicate permeable crystallization material as a base layer, then roller coating inorganic powder coloring slurry as a pattern layer, and finally coating a layer of nano modified silicate permeable crystallization material as a cover layer, the construction process is simple, the efficiency is high, and 1 worker can construct 80-150 m per day under the condition of plane construction2(ii) a Under the condition of vertical construction, 1 worker can construct 40-50m per day2。
(2) Different from the prior common acrylic acid, fluorocarbon transparent paint and other materials which form an airtight film and inhibit the outward diffusion of harmful water vapor in the concrete, the three-layer material coated on the base surface of the concrete in the method can form a stable breathable net structure, the air-permeable reticular structure can prevent the invasion of substances such as acid, alkali, harmful water, carbon dioxide and the like (the structure of pores and microcracks is optimized, the diameter of pores is reduced to below 50nm after plugging, and harmless pores and harmless microcracks are formed), meanwhile, the outward diffusion of harmful water vapor in the concrete is not inhibited, the basal layer and the cover layer can be chemically reacted with the plain concrete matrix and are integrated, the inorganic powder used by the pattern layer is a cement-based composite material, the binding force with the base surface of the plain concrete is strong, and the base surface and the surface layer can be subjected to chemical reaction to generate gel and crystal with stable physical and chemical properties; therefore, the base layer and the cover layer tightly wrap the pattern layer on the surface of the concrete, and the pattern layer does not crack or peel after long-term use and can maintain the decorative effect for a long time. In addition, the inorganic powder is used for replacing the traditional liquid coating, so that the long-distance transportation is facilitated, and the quality guarantee period is long.
Drawings
Fig. 1 is a flowchart of a construction method according to an embodiment of the present invention.
Fig. 2 is a flowchart of a construction method according to another embodiment of the present invention.
Fig. 3 is a schematic diagram of the principle and action mechanism of the scheme of the invention.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
The construction method is mainly characterized in that a three-layer combined structure of a bottom layer nano modified silicate permeable crystallization material, inorganic powder coloring slurry and a cover surface nano modified silicate permeable crystallization material is formed on a plain concrete base surface, and the three layers have a synergistic effect.
The construction method of the invention comprises three steps: first of all, a base treatment of plain concrete (priming), then an intermediate finishing (pattern or makeup) treatment and finally a finishing treatment of the surface (reinforcement protection) are carried out. The main purpose of base surface treatment is to repair the concrete quality problems of honeycomb pitted surface, slab staggering, splicing seams, oil stains and the like; the repairing method is that the nano modified silicate permeable crystallization material (the grain diameter of active particles is 3-30nm) is sprayed (the spraying effect is better than that of roller coating and is beneficial to permeating below the surface of plain concrete), and harmful capillary pores and superfine cracks are blocked and repaired; in the process, the incompletely reacted nano modified silicate permeable crystallization material also provides a large amount of hydrophilic groups (silicate and hydroxide ion groups) for the middle makeup layer (pattern layer) and provides a high-quality interface for middle layer construction. In the middle color (pattern or makeup) treatment process, the methods of spraying, roller coating and the like are mainly adopted, the cement-based composite powder material, the inorganic toning color paste and the macromolecular adhesive are mixed into inorganic powder coloring slurry, the inorganic powder coloring slurry is coated on the concrete base surface subjected to the bottoming treatment, and the inorganic powder coloring slurry and the nano modified silicate permeable crystalline material on the plain concrete base surface generate a rigid network and a flexible network (formed by the macromolecular adhesive in the pattern layer) interpenetrating stable structure. In the final surface layer finishing treatment, the nano modified silicate permeable crystallization material (with the grain diameter of 30-50nm) is sprayed again to react with the solidified inorganic powder coloring slurry (pattern layer) to generate stable gel and crystals, and the gel and the crystals are compounded into a rigid network structure. Through surface finishing treatment, the glossiness of the concrete base surface is improved, meanwhile, the corrosion of harmful substances such as acid, alkali, water, carbon dioxide and the like can be effectively prevented, the adhesion firmness of the pattern layer on the concrete base surface is enhanced, the environment tolerance of the decorative effect of the pattern layer is enhanced, and the service life of decorative patterns is prolonged.
Specifically, the mechanism of action of the present invention is shown in fig. 3. The nano modified silicate permeable crystalline material sprayed or brushed on the plain concrete base surface for the first time permeates into the concrete surface within a certain depth range and is crystallized and solidified to generate C-S-H gel (CaO)x·SiO2·(H2O)y) The surface pores or capillary pores of the concrete are filled, thereby improving the long-term durability of the concrete. After the inorganic water-based nano modified silicate solution penetrates into the depth of the surface layer of the concrete, part of materials which do not react with the concrete and are crystallized still contain a large amount of hydrophilic silicate ions and hydroxyl ion groups, so that a high-quality bonding interface is provided for the adhesion of the inorganic powder coloring slurry of the middle layer, and the silicate ions in the inorganic water-based nano modified silicate solution immediately react with calcium ions in the inorganic powder coloring slurry of the middle layer to generate stable calcium silicate gel and crystals; the hydroxide ions and the superfine silicon dioxide in the inorganic powder coloring slurry are subjected to chemical reaction to generate silicate ions, the silicate ions continuously permeate into capillary pores and microcracks of a concrete base surface on one hand to optimize the structural form of the concrete, and the silicate ions continuously undergo chemical reaction with calcium ions in the inorganic powder coloring slurry on the other hand to generate calcium silicate C-S-H gel and crystals; thus, the gel and crystal formed by the nano-modified silicate material of the first layer and the intermediate layer form a rigid network structure. Meanwhile, the inorganic powder coloring slurry of the middle layer is formed by mixing cement-based inorganic powder and an adhesive, the adhesive is respectively adhered to the inorganic powder and the plain concrete base surface, and the adhesive after dehydration forms a flexible net-shaped structure; the rigid reticular structure and the flexible reticular structure are mutually supported to form a stable composite reticular structure with rigidity and flexibility. The stable composite net structure can prevent the erosion of substances such as external acid, alkali, harmful water, carbon dioxide and the like, and does not inhibit the outward diffusion of harmful water vapor in concrete due to the existence of micro pores. Finally, the constructed concrete structure can be maintained in a dynamic balance for a long time, and the durability can be effectively improved.
The nano modified silicate permeable crystallization materials sprayed for the first time and the third time react with cement-based inorganic powder in the middle layer to generate calcium silicate C-S-H gel and crystals to form a rigid network structure, the flexible network structure formed by the adhesive contained in the middle layer is mutually supported and interpenetrated with the upper and lower network structures respectively to form three layers of flexible network and rigid network interpenetrating network structures, and the structure is a thin layer capable of ventilating, so that the moisture diffusion in plain concrete is not influenced, the invasion of external harmful substances (acid, alkali, harmful moisture, carbon dioxide and the like) can be inhibited, the nano modified silicate permeable crystallization materials can be integrated with a base surface of the plain concrete, and the nano modified silicate permeable crystallization materials are difficult to crack and fall off.
The construction method of the invention is slightly different for different plain concrete base surfaces. For concrete base surfaces with quality problems of chromatic aberration, potholes, cracks and the like, the potholes or large cracks need to be repaired and the micro cracks need to be repaired, and for the concrete base surfaces with better quality, a first layer of nano modified silicate permeable crystalline material can be directly sprayed or painted.
As shown in FIG. 1, the construction method for creating the clear water effect on the concrete base surface provided by the invention aims at the concrete base surface with quality problems of chromatic aberration, potholes, cracks and the like, and comprises the following steps:
s1: the concrete base surface is subjected to pothole or large crack repair by adopting high-strength repair mortar (the width of the high-strength concrete is more than 4mm), and the micro crack is repaired by adopting inorganic or organic materials (the width of the micro crack is less than 4 mm). Before the patching, the dust and the dirt on the concrete base surface are removed, and the base surface is kept clear.
The grouting material used for repairing the micro-cracks can be one or more of known materials such as a solid inorganic powder infiltration crystallization material, epoxy resin, polyurea resin, polyurethane, an acrylate emulsion cement-based infiltration crystallization type waterproof material and the like.
And S2, coating the basal plane by adopting the nano modified silicate permeable crystallization material.
The nano modified silicate permeable crystalline material comprises the following components: 5-30 parts of sodium silicate, 5-20 parts of potassium silicate, 0.05-0.5 part of surfactant, 0.1-1 part of reaction retarder, 0.1-0.5 part of reducing agent, 0.1-2 parts of reaction accelerator, 0.01-0.5 part of anti-freezing agent, 0.1-1 part of metal ion locking agent, 0.1-1 part of surface enhancer, 0.1-0.5 part of antirust agent and 40-70 parts of deionized water.
Preferably, the surfactant is any one of primary alcohol, secondary alcohol, dodecyl trimethyl amlodipine, imidazolines, polyoxyethylene tridecyl ether or castor oil polyoxyethylene ether ester.
Preferably, the reaction retarder is any one of borate, sodium hydroxide or potassium hydroxide.
Preferably, the reducing agent is an inorganic ionic reducing agent of the thiourea or sodium thiosulfate type.
Preferably, the reaction accelerator is any one of an inorganic halide salt (ammonium chloride, etc.) ionic liquid and a citrate ion.
Preferably, the anti-freezing agent is a carbonate; preferably, the metal ion blocking agent is sodium metaphosphate.
Preferably, the surface enhancer is magnesium fluoride or magnesium chloride.
Preferably, the rust inhibitor is a diamino silver complex or an aminoalcohol alkali metal species.
Wherein, the nano modified silicate osmotic crystallization material is packaged and transported in the form of inorganic powder in the packaging, selling and transporting processes, and is temporarily added with water before use to prepare slurry convenient for spraying or brushing, and the preparation method comprises the following steps: weighing a surfactant, a reaction retarder, a reducing agent, a reaction promoter, an anti-freezing agent, a metal ion locking agent, a surface enhancer, an antirust agent and deionized water, mixing and stirring the components in a high-speed shearing kettle at the rotating speed of 1000rpm, dispersing the components, adding sodium silicate and potassium silicate while stirring at a high speed until the components are completely added, and enabling the mixed solution to be a completely transparent and uniform liquid.
Preferably, the particle size of the nano silicon oxide active particles in the nano modified silicate permeable crystallization material is 3-30nm, the viscosity of the material is 0.8-1.05 MPa.S, and the density is 1.01-1.08 g/cm3The pH value is more than or equal to 11.
Preferably, the coating mode is spray coating or roll coating, and spray coating is preferably adopted; preference is given toThe spraying amount is 100mL-250mL/m2And the concrete penetrates to a depth of more than 4cm of the concrete base surface. Aiming at concrete base surfaces with different grades and different ages, the spraying amount is slightly different, and generally the spraying amount is 100mL-250mL/m2Waiting for a proper time, the requirement of penetrating to the depth of 4cm below the base surface can be met, and the penetration depth can be determined by analyzing the content of sodium and potassium elements through sample slices.
Preferably, after the spraying is finished, the concrete is placed for more than 20min (preferably 30-60min), and then the step S3 is carried out, so that the nano modified silicate permeable crystalline material fully permeates into the concrete surface within a certain depth range and is crystallized and solidified to generate C-S-H gel (CaO)x·SiO2·(H2O)y) Filling the pores or capillary pores on the surface of the concrete.
In this step, the nano-modified silicate permeates Silicate Ions (SiO) of nano-scale size in the crystalline material4 2-) With calcium ions (Ca)2+) Under the combined action of various catalysts and dispersants, a hydration reaction is carried out to generate hexahedral cubic cone with stable structure or amorphous hydrated calcium silicate, namely C-S-H gel, which can block harmful pores with the inner diameter of more than 50nm in a certain depth of a concrete base surface. The reaction process is as follows:
SiO4 2-+xCa(OH)2+yH2O→xCaO·SiO2·zH2O+2OH-+(x+y-z-1)H2O
wherein, the calcium ions are provided by layered calcium hydroxide in the cement matrix, and the calcium ions are released when the calcium hydroxide is unstable and meets water. The molecular formula of the C-S-H gel is CaOx·SiO2·(H2O)zAnd x and z are variable.
After the treatment of the step S2, the plugging of harmful pores (harmful pores with a diameter of more than 50nm) on the repaired base surface can be realized, the pore structure is optimized, the compactness of the plain concrete surface layer within a certain range of depth is enhanced, the loss (alkali sealing) of alkaline substances (hydroxides such as calcium hydroxide) in the concrete base body is inhibited, more hydrophilic groups are given to the plain concrete base surface, and an excellent and firm bonding interface is provided for the intermediate inorganic coloring slurry.
S3: stirring cement-based inorganic powder and a binder, and adding an inorganic pigment for color matching to prepare basic coloring slurry; and (3) rolling the basic coloring slurry on a concrete base surface to cover the concrete base surface, adjusting the basic coloring slurry into coloring slurries with different colors according to actual design requirements, and rolling the coloring slurries with different colors according to the design requirements to realize irregular natural texture imitation.
In formulating the base colorant slurry, the inorganic powder may include, but is not limited to, the following components: cement, nano titanium dioxide, nano calcium carbonate, superfine silicon dioxide, nano calcium oxide, silica fume and inorganic pigment. In other embodiments, the material of the inorganic powder is not limited to the material described in the present invention, and may be any existing or developing cement-based inorganic powder used for concrete wall decoration.
Preferably, the cement is one or a mixture of three of the following: superfine portland cement (800-1000 meshes), high belite cement (specification requirements: magnesium oxide content is more than 5.0 wt%, alkali content is not more than 0.60 wt%, sulfur trioxide content is not more than 3.5 wt%, loss on ignition is not more than 3.0 wt%, specific surface area is not less than 250 m-2In terms of/kg. Sixthly, setting time is not earlier than 60min for initial setting and not later than 12h for final setting. ) And superfine phosphate cement.
Preferably, the nano titanium dioxide is anatase type and rutile type.
Preferably, the nano calcium carbonate: 200 to 400 nm.
Preferably, the ultrafine silica: the specific surface area is 180-200 m2/g。
Wherein, the cement is a gel material, and the nano titanium dioxide, the nano calcium carbonate, the silicon dioxide and the calcium oxide belong to aggregates; silica fume provides an active pozzolanic component.
The inorganic pigment is the existing common inorganic color, including three colors of black, yellow and red, and is prepared according to the design requirement by taking the color closest to the base surface of the plain concrete as the reference. Preferably, the pigment is one of rutile titanium dioxide, iron oxide pigment, phthalocyanine pigment or composite pigment or a mixture thereof.
When preparing the basic coloring slurry, the adhesive can be any one or more of EVA emulsion, acrylate emulsion, silicone-acrylic emulsion and styrene-acrylic emulsion. When preparing the basic coloring slurry, water: adhesive agent: the mass ratio of the inorganic powder is 1-1.5: 1: 3 to 4.
Firstly, preparing basic coloring slurry which is close to the color of a plain concrete base surface, and performing roller coating on the basic coloring slurry by using a conventional roller to form a coating with the thickness of 0.2-0.5mm so as to cover the plain concrete base surface. And then, according to design requirements, adjusting the depth of the basic coloring slurry by adding water for dilution or adding white nano calcium carbonate and the like, performing roller coating by adopting a special-shaped roller, and performing roller coating on the coloring slurry with different colors and depths to realize irregular natural-imitated decorative textures.
After the completion of step S3, the base coloring paste and the coloring paste are left to stand for 2 hours or more (preferably 2 to 4 hours) and dried, and then the operation of step S4 is performed: the nanometer modified silicate permeable crystallization material is sprayed on the surface of the basic coloring slurry and the coloring slurry to be used as a cover surface protective agent, and construction is completed after drying, so that the stability of the inorganic coloring slurry is further tamped, and the effects of inhibiting degradation factors such as bacteria, algae, carbonization, freeze thawing, acid, alkali salt and the like are achieved.
In step S4, the composition of the nano-modified silicate infiltration crystallized material is substantially the same as that of step S2. In the step, the particle size of the nano silicon oxide active particles in the nano modified silicate permeable crystallization material is larger than that of the nano silicon oxide active particles in the step S2, preferably 30-50nm, the viscosity of the spraying material is 0.9-1.08 MPa.S, and the density is 1.03-1.10 g/cm3The pH value is more than or equal to 11.
In step S2, the nano-modified silicate capillary crystalline material has a smaller particle size so as to facilitate the smaller particle size to enter the micro-cracks to block and optimize the pores and the micro-cracks; in step S4, the grain size of the nano-modified silicate infiltration crystallization material is larger, so that a more stable network structure can be formed after the inorganic powder material is compounded, and the adhesive force of the powder is improved.
As shown in fig. 2, the construction method for creating a clean water effect on a concrete base surface provided by the invention can directly spray a nano modified silicate permeable crystalline material on the surface of a plain concrete base surface without the need of performing pre-steps such as pit or large crack repair by using high-strength repair mortar in advance and grouting repair of micro cracks by using inorganic or organic materials, and comprises the following steps:
step 1: the nano modified silicate permeable crystallization material is adopted for carrying out base surface spraying or brushing, and the spraying (brushing) amount is 100ml-250ml/m2The plugging agent can penetrate to the depth of more than 4mm of the base surface, can also plug harmful pores (with the seam width of 50 nm-0.4 mm) on the base surface, optimizes the pore structure, strengthens the compactness of the surface layer of plain concrete in a certain range of depth, and inhibits alkaline substances (hydroxides such as calcium hydroxide and the like) in the concrete matrix from losing (alkali sealing). And meanwhile, more hydrophilic groups are given to the plain concrete base surface, so that an excellent bonding interface is provided for the coloring layer.
Step 2: stirring cement-based inorganic powder and a binder, and adding an inorganic pigment for color matching to prepare basic coloring slurry; the basic coloring slurry is roll-coated on a concrete base surface to cover the concrete base surface, then the basic coloring slurry is adjusted into coloring slurries with different colors according to actual design requirements, and the coloring slurries with different colors and different colors are roll-coated according to the design requirements to realize irregular natural texture imitation;
and step 3: and after the basic coloring slurry and the coloring slurry are dried, performing top coating by adopting a nano modified silicate permeable crystallization material, and finishing construction after drying.
Wherein, the steps 1 to 3 correspond to the steps S2 to S4 in the construction method, and the operation method, conditions, interval time, etc. are the same as those of the steps S2 to S4, and are not repeated herein.
Now, a concrete base surface with good quality, namely, the surface without quality problems such as color difference, potholes, cracks and the like is taken as an example to explain how to create the clear water effect on the surface according to the method of the invention.
Example 1
Firstly, adopting nano modified silicate osmotic crystallization material to make base treatmentSurface spraying with a spraying amount of 150ml/m2And the water penetrates to the depth of more than 4mm of the concrete base surface. The preparation process of the nano modified silicate permeable crystallization material is as follows:
weighing 0.07 part of dodecyl trimethyl amlodipine, 0.15 part of sodium borate, 0.3 part of sodium thiosulfate, 0.15 part of ammonium chloride, 0.2 part of potassium carbonate, 0.15 part of sodium metaphosphate, 0.15 part of magnesium fluoride, 0.35 part of sodium aminoalcohol, 65 parts of deionized water and the like, mixing, stirring and dispersing in a high-speed shearing kettle at the rotating speed of 1000rpm, adding 23 parts of sodium silicate and 15 parts of potassium silicate while stirring at high speed until the mixture is completely added, and enabling the mixed solution to be completely transparent and uniform liquid. Wherein the particle size of the nano silicon oxide active particles is 3-30nm, the viscosity is 1.02MPa.S, and the density is 1.04g/cm3The pH value is greater than 11.
After the spraying, the second step was carried out after 35 minutes.
Secondly, stirring the cement-based inorganic powder and the adhesive, and adding an inorganic pigment for color matching to prepare basic coloring slurry; and (3) rolling the basic coloring slurry on a concrete base surface to cover the concrete base surface, adjusting the basic coloring slurry into coloring slurries with different colors according to actual design requirements, and rolling the coloring slurries with different colors according to the design requirements to realize irregular natural texture imitation.
Wherein the inorganic powder consists of the following components: 45 parts of superfine portland cement (800 meshes), 10 parts of anatase type nano titanium dioxide, 20 parts of nano calcium carbonate (300-400nm), and superfine silicon dioxide (the specific surface area is about 180 m)2Per gram) 20 parts by mass, 15 parts by mass of nano calcium oxide, 15 parts by mass of silica fume and 3.5 parts by mass of iron oxide pigment.
Wherein the adhesive is EVA emulsion (model BJ-707, solid content is more than or equal to 54.5%, produced by Beijing organic factory). When preparing the basic coloring slurry, water: adhesive agent: the mass ratio of the inorganic powder is 1.5: 1: and 4, preparing basic coloring slurry which is close to the color of the plain concrete base surface, and then performing roller coating on the base coloring slurry by adopting a conventional roller to cover the plain concrete base surface, wherein the thickness of the roller coating is 0.2-0.5 mm.
And then, adjusting the color depth of the basic coloring slurry by adding water for dilution or adding white nano calcium carbonate (or black iron oxide) and the like according to the design requirements, performing roller coating by adopting a special-shaped roller, and performing roller coating on the coloring slurry with different color depths to realize the irregular natural-imitated decorative texture. And after the coating of the coloring slurry for imitating the natural decorative texture is finished, standing for 2h for waiting for drying of the coloring slurry, and then carrying out the next operation.
And thirdly, spraying a nano modified silicate permeable crystallization material on the surface (surface imitating natural decorative texture patterns) of the coloring slurry obtained in the second step as a finish protective agent, and drying to finish the construction of clear water effect construction of the concrete base and deep durability protection of the concrete base. Through the steps, the stability of the inorganic coloring slurry is further tamped, and the effects of inhibiting the erosion of degradation factors such as bacteria, algae, carbonization, freeze thawing, acid, alkali, salt and the like are achieved.
In the step, the preparation process of the nano modified silicate permeable crystallization material is as follows:
weighing 0.07 part of dodecyl trimethyl amlodipine, 0.15 part of sodium borate, 0.3 part of sodium thiosulfate, 0.15 part of ammonium chloride, 0.2 part of potassium carbonate, 0.15 part of sodium metaphosphate, 0.15 part of magnesium fluoride, 0.35 part of sodium aminoalcohol, 60 parts of deionized water and the like, mixing, stirring and dispersing in a high-speed shearing kettle at the rotating speed of 1000rpm, adding 24 parts of sodium silicate and 16 parts of potassium silicate while stirring at high speed until the mixture is completely added, and enabling the mixed solution to be completely transparent and uniform liquid. Wherein the particle size of the active particles is 30-50nm, the viscosity of the spraying material is 1.07MPa.S, and the density is 1.09g/cm3The pH value is greater than 11.
After the method is implemented, natural wind blowing and sun drying and artificial wetting tests for 1 month continuously show that the phenomena of whitening, yellowing, more fine cracks and the like do not occur on the surface of the concrete base surface, and the problems of peeling of slurry, overflow of ochre rust water on the surface and the like do not occur.
Example 2
Firstly, adopting nano modified silicate osmotic crystallization material to spray base surface, and the spraying quantity is 120ml/m2And slicing analysis, so that the nano modified silicate penetration crystallization material penetrates to the depth of more than 4mm of the concrete base surface. TheThe preparation process of the nano modified silicate permeable crystallization material is as follows:
weighing 0.05 part of dodecyl trimethyl amlodipine, 0.10 part of sodium borate, 0.1 part of sodium thiosulfate, 0.10 part of ammonium chloride, 0.15 part of potassium carbonate, 0.10 part of sodium metaphosphate, 0.1 part of magnesium fluoride, 0.15 part of sodium aminoalcohol, 63 parts of deionized water and the like, mixing, stirring and dispersing in a high-speed shearing kettle at the rotating speed of 1000rpm, adding 23 parts of sodium silicate solution and 16 parts of potassium silicate solution while stirring at high speed until the mixture is completely added, and enabling the mixture to be completely transparent and uniform liquid. Wherein the particle size of the nano silicon oxide active particles is 3-30nm, the viscosity is 1.03MPa.S, and the density is 1.04g/cm3The pH value is greater than 11.
After the spraying is finished, the second step operation is carried out after 40 minutes.
Secondly, stirring the cement-based inorganic powder and the adhesive, and adding an inorganic pigment for color matching to prepare basic coloring slurry; and (3) rolling the basic coloring slurry on a concrete base surface to cover the concrete base surface, adjusting the basic coloring slurry into coloring slurries with different colors according to actual design requirements, and rolling the coloring slurries with different colors according to the design requirements to realize irregular natural texture imitation.
Wherein the inorganic powder consists of the following components: 40 parts of superfine portland cement (1000 meshes), 12 parts of anatase type nano titanium dioxide, 20 parts of nano calcium carbonate (200-300nm), and superfine silicon dioxide (the specific surface area is about 200 m)223 parts by mass, 15 parts by mass of nano calcium oxide, 16 parts by mass of silica fume and 3.5 parts by mass of iron oxide pigment.
Wherein the adhesive is EVA emulsion (model BJ-707, solid content is more than or equal to 54.5%, produced by Beijing organic factory). When preparing the basic coloring slurry, water: adhesive agent: the mass ratio of the inorganic powder is 1.5: 1: and 4, preparing basic coloring slurry which is close to the color of the plain concrete base surface, and then performing roller coating on the base coloring slurry by adopting a conventional roller to cover the plain concrete base surface, wherein the thickness of the roller coating is 0.2-0.5 mm.
And then, adjusting the color depth of the basic coloring slurry by adding water for dilution or adding white nano calcium carbonate (or black iron oxide) and the like according to the design requirements, performing roller coating by adopting a special-shaped roller, and performing roller coating on the coloring slurry with different color depths to realize the irregular natural-imitated decorative texture. And after the coating of the coloring slurry for imitating the natural decorative texture is finished, standing for 2.5h for waiting for drying of the coloring slurry, and then carrying out the next operation.
And thirdly, spraying a nano modified silicate permeable crystallization material on the surface (surface imitating natural decorative texture patterns) of the coloring slurry obtained in the second step as a finish protective agent, and drying to finish the construction of clear water effect construction of the concrete base and deep durability protection of the concrete base. Through the steps, the stability of the inorganic coloring slurry is further tamped, and the effects of inhibiting the erosion of degradation factors such as bacteria, algae, carbonization, freeze thawing, acid, alkali, salt and the like are achieved.
In the step, the preparation process of the nano modified silicate permeable crystallization material is as follows:
weighing 0.07 part of dodecyl trimethyl amlodipine, 0.15 part of sodium borate, 0.3 part of sodium thiosulfate, 0.15 part of ammonium chloride, 0.2 part of potassium carbonate, 0.15 part of sodium metaphosphate, 0.15 part of magnesium fluoride, 0.35 part of sodium aminoalcohol, 61 parts of deionized water and the like, mixing, stirring and dispersing in a high-speed shearing kettle at the rotating speed of 1000rpm, adding 24 parts of sodium silicate and 16 parts of potassium silicate while stirring at high speed until the mixture is completely added, and enabling the mixed solution to be completely transparent and uniform liquid. Wherein the particle size of the active particles is 30-50nm, the viscosity of the spraying material is 1.06MPa.S, and the density is 1.09g/cm3The pH value is greater than 11. For a description of the active particles, see the above description.
After the method is implemented, natural wind blowing and sun drying and artificial wetting tests for 1 month continuously show that the phenomena of whitening, yellowing, more fine cracks and the like do not occur on the surface of the concrete base surface, and the problems of peeling of slurry, overflow of ochre rust water on the surface and the like do not occur.
Example 3
Firstly, adopting nano modified silicate osmotic crystallization material to spray base surface, the spraying amount is 200ml/m2And slicing detection, wherein the concrete penetrates to the depth of more than 4mm of the concrete basal plane. The preparation process of the nano modified silicate permeable crystallization material is as follows:
weighing 0.05 part of dodecyl trimethyl amlodipine, 0.10 part of sodium borate, 0.1 part of sodium thiosulfate, 0.10 part of ammonium chloride, 0.15 part of potassium carbonate, 0.10 part of sodium metaphosphate, 0.1 part of magnesium fluoride, 0.15 part of sodium aminoalcohol, 66 parts of deionized water and the like, mixing, stirring and dispersing in a high-speed shearing kettle at the rotating speed of 1200rpm, adding 20 parts of sodium silicate solution and 18 parts of potassium silicate solution while stirring at high speed until the mixture is completely added, and enabling the mixture to be completely transparent and uniform liquid. Wherein the particle size of the nano silicon oxide active particles is 3-30nm, the viscosity is 1.02MPa.S, and the density is 1.02g/cm3The pH value is greater than 11.
After the spraying is finished, the second step operation is carried out after 40 minutes.
Secondly, stirring the cement-based inorganic powder and the adhesive, and adding an inorganic pigment for color matching to prepare basic coloring slurry; and (3) rolling the basic coloring slurry on a concrete base surface to cover the concrete base surface, adjusting the basic coloring slurry into coloring slurries with different colors according to actual design requirements, and rolling the coloring slurries with different colors according to the design requirements to realize irregular natural texture imitation.
Wherein the inorganic powder consists of the following components: 44 parts by mass of superfine portland cement (1000 meshes), 8 parts by mass of anatase type nano titanium dioxide, 20 parts by mass of nano calcium carbonate (300-400nm), and superfine silicon dioxide (the specific surface area is 180 m)2Per gram) 22 parts by mass, 15 parts by mass of nano calcium oxide, 16 parts by mass of silica fume and 3.5 parts by mass of iron oxide pigment.
Wherein the adhesive is EVA emulsion (model BJ-707, solid content is more than or equal to 54.5%, produced by Beijing organic factory). When preparing the basic coloring slurry, water: adhesive agent: the mass ratio of the inorganic powder is 1.5: 1: and 3.5, preparing basic coloring slurry which is close to the color of the plain concrete base surface, and then performing roller coating on the base coloring slurry by adopting a conventional roller to cover the plain concrete base surface, wherein the thickness of the roller coating is 0.2-0.5 mm.
And then, adjusting the color depth of the basic coloring slurry by adding water for dilution or adding white nano calcium carbonate (or black iron oxide) and the like according to the design requirements, performing roller coating by adopting a special-shaped roller, and performing roller coating on the coloring slurry with different color depths to realize the irregular natural-imitated decorative texture. And after the coating of the coloring slurry for imitating the natural decorative texture is finished, standing for 3h for waiting for drying of the coloring slurry, and then carrying out the next operation.
And thirdly, spraying a nano modified silicate permeable crystallization material on the surface (surface imitating natural decorative texture patterns) of the coloring slurry obtained in the second step as a finish protective agent, and drying to finish the construction of clear water effect construction of the concrete base and deep durability protection of the concrete base. Through the steps, the stability of the inorganic coloring slurry is further tamped, and the effects of inhibiting the erosion of degradation factors such as bacteria, algae, carbonization, freeze thawing, acid, alkali, salt and the like are achieved.
In the step, the preparation process of the nano modified silicate permeable crystallization material is as follows:
weighing 0.05 part of dodecyl trimethyl amlodipine, 0.10 part of sodium borate, 0.1 part of sodium thiosulfate, 0.10 part of ammonium chloride, 0.15 part of potassium carbonate, 0.10 part of sodium metaphosphate, 0.1 part of magnesium fluoride, 0.15 part of sodium aminoalcohol, 62 parts of deionized water and the like, mixing, stirring and dispersing in a high-speed shearing kettle at the rotating speed of 1200rpm, adding 24 parts of sodium silicate solution and 20 parts of potassium silicate solution while stirring at high speed until the mixture is completely added, and enabling the mixture to be completely transparent and uniform liquid. Wherein the particle size of the active particles is 30-50nm, the viscosity of the spraying material is 1.08MPa.S, and the density is about 1.10g/cm3The pH value is greater than 11.
After the method is implemented, natural wind blowing and sun drying and artificial wetting tests for 1 month continuously show that the phenomena of whitening, yellowing, more fine cracks and the like do not occur on the surface of the concrete base surface, and the problems of peeling of slurry, overflow of ochre rust water on the surface and the like do not occur.
Comparative example
Comparative example 1
Comparative example 1 is based on example 1, except that the first step; the inorganic powder coloring slurry of the second layer and the finally-applied nano modified silicate infiltration crystallization material are directly coated on the concrete surface, and other operations are the same as those of the example 1.
The test result shows that the middle colored powder pattern layer (decoration layer) for forming the imitated natural texture has insufficient adhesive force on the concrete base surface, cracks and peeling occur, and the beauty and the durability of the concrete are influenced.
Comparative example 2
Comparative example 2 is based on example 1, except that the third step; the other operations were the same as in example 1.
The test result shows that the middle colored powder pattern layer (decorative layer) for forming the imitated natural texture has local pulverization and shedding, which affects the beauty and the durability of concrete and has unstable effect of the imitated natural texture.
Comparative example 3
Comparative example 3 is based on example 1, without the first and third steps, and the "nano-modified silicate infiltrating crystalline material" formulated in the first step is directly mixed with the "basic coloring paste" in the second step in a volume ratio of 1:1, and then roll-coated onto the concrete base surface.
The test result shows that the inorganic material in the coloring slurry reacts with the nano modified silicate permeable crystallization material in advance, so that the viscosity is too high, the construction is inconvenient, the rigidity of the net structure is insufficient, and the residual active ingredients capable of reacting with the concrete base surface in the nano modified silicate permeable crystallization material are insufficient, so that the adhesive force with the concrete base surface is poor.
Comparative example 4
Comparative example 4 is based on example 1, after the first spraying of the nano-modified silicate material was completed, the second roller coating of the inorganic powder coloring slurry was performed only at intervals of 5min (the nano-modified silicate material not waiting for the first spraying was fully reacted with the concrete base), and the third spraying of the nano-modified silicate material was performed only at intervals of 10min (the un-waiting inorganic powder coloring slurry was dried and solidified).
Test results show that the final breathable net structure is incomplete, and the optimal protection and clean water building effects cannot be achieved. The interval time between the first step and the second step is too short, most active ingredients in the nano water-based inorganic silicate permeable crystallization material participate in the curing reaction with the inorganic powder coloring slurry of the second part, the amount of the active ingredients penetrating into the concrete is too small, the capillary pores and the microcracks of the concrete are not sufficiently repaired, and the adhesive force of the inorganic powder coloring slurry after curing is poor; the interval between the second step and the third step is too short, the phenomenon of flow-hanging of the coloring paste occurs, and the network structure is incomplete.
The results of the hundred grid test performed after poaching example 1 and comparative examples 1-4 were as follows:
note: the tools for testing the adhesion of the coated objects are classified into 1-5 grades according to the Japanese Industrial Standard (JIS), and the higher the grade is, the stricter the requirements are, and when the grade 5 is required in the customer specification, the falling-off is not allowed at all. Reference standard: scratch test for GBT9286-1998 paint and varnish films
In summary, in the construction method of the present invention, the first step of spraying or painting the base layer of the nano modified silicate permeable crystalline material, the second step of painting or roll-coating the pattern layer of the inorganic powder coloring slurry, and the third step of spraying or painting the overcoat layer of the nano modified silicate permeable crystalline material have a synergistic effect, and when the first layer or the third layer is removed, the adhesion of the colored powder pattern layer (decoration layer) on the concrete base surface is insufficient and peeling or powdering and dropping are easily caused, which affects the beauty and the durability of the concrete. In addition, proper time is needed to be separated among the three steps, otherwise, the effect of producing clean water is not ideal, and the durability is poor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A construction method for creating a clear water effect on a concrete base is characterized by comprising the following steps:
step 1, coating a base surface by adopting a nano modified silicate permeable crystallization material;
step 2, coating coloring slurry on the concrete base surface to cover the concrete base surface and/or form surface textures, wherein the coloring slurry is prepared by stirring cement-based inorganic powder and a binder and adding an inorganic pigment for color matching;
step 3, after the coloring slurry is dried, performing finish coating by adopting a nano modified silicate permeable crystallization material, and completing construction after drying;
in step 1 and step 3, the nano-modified silicate permeable crystalline material comprises the following components: 5-30 parts of sodium silicate, 5-20 parts of potassium silicate, 0.05-0.5 part of surfactant, 0.1-1 part of reaction retarder, 0.1-0.5 part of reducing agent, 0.1-2 parts of reaction accelerator, 0.01-0.5 part of anti-freezing agent, 0.1-1 part of metal ion locking agent, 0.1-1 part of surface reinforcer, 0.1-0.5 part of antirust agent and 40-70 parts of deionized water.
2. The construction method according to claim 1, wherein the step 1 is preceded by a repairing step of: and (3) adopting repair mortar to repair potholes or large cracks on the concrete base surface, and adopting inorganic or organic materials to carry out grouting to repair fine cracks.
3. The method of claim 2, wherein prior to the step of repairing, the concrete substrate is cleaned of dust and dirt and the substrate is kept clear of water.
4. The construction method according to claim 2, wherein the material for repairing the micro cracks or the ultra-fine cracks by grouting is one or more of a solid inorganic powder permeable crystalline material, epoxy resin, polyurea resin, polyurethane and acrylate emulsion cement-based permeable crystalline waterproof material.
5. The construction method according to any one of claims 1 to 4, wherein in the step 1, the particle size of active particles in the nano modified silicate permeable crystallization material is 3 to 30nm, the material viscosity is 0.8 to 1.05MPa.S, and the density is 1.01 to 1.08g/cm3The pH value is more than or equal to 11.
6. The construction method according to any one of claims 1 to 4, wherein in the step 1, the coating is carried out by spraying; the spraying amount is 100mL-250mL/m2And the concrete penetrates to a depth of more than 4cm of the concrete base surface.
7. The construction method according to any one of claims 1 to 4, wherein the nano modified silicate permeable crystalline material of step 1 is sprayed, left for 30 to 60min, and then step 2 is performed.
8. The construction method according to any one of claims 1 to 4, wherein the forming of the surface texture in step 2 comprises: and coating the coloring slurry with different colors according to the design requirement to form a random imitated natural texture.
9. The construction method according to any one of claims 1 to 4, wherein the coloring paste is dried by naturally standing for more than or equal to 2 hours after the completion of the step 2, and then the step 3 is performed, namely: and spraying the nano modified silicate permeable crystallization material on the surface of the coloring slurry to be used as a cover surface protective agent.
10. The construction method according to any one of claims 1 to 4, wherein in the step 3, the particle size of active particles in the nano-modified silicate permeable crystallization material is 30 to 50nm, the material viscosity is 0.9 to 1.08MPa.S, and the density is 1.03 to 1.10g/cm3The pH value is more than or equal to 11.
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