Capillary crystallization type concrete protection liquid system with anti-carbonization and anti-corrosion functions as well as preparation method and application of capillary crystallization type concrete protection liquid system

Abstract

The invention discloses a permeable crystallization type concrete protection liquid system with anti-carbonization and anti-corrosion functions as well as a preparation method and application of the permeable crystallization type concrete protection liquid system. The protection liquid system comprises a capillary crystalline type inorganic nano concrete protection liquid, an enhanced coloring agent and organic-inorganic composite resin varnish. The protection liquid system is used for protecting a concrete structure and comprises the following steps: firstly, coating the surface of the concrete structure with a capillary crystalline inorganic nano concrete protection liquid, curing until curing, then coating with an enhanced coloring agent, curing until curing, finally coating with organic-inorganic composite resin varnish, and curing until curing. The protection liquid system is used for protecting concrete structures and has the advantages of excellent water resistance, carbonization resistance, weather resistance, acid and alkali corrosion resistance and the like, the coloring layer and the sealing layer can meet different decoration requirements, meanwhile, the surface hardness and weather resistance are improved, the three-layer composite structure provides triple protection of the structure, the vision and the attractiveness, and the protection liquid system is superior to an existing single-function material.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of coatings, and particularly relates to a permeable crystalline concrete protection liquid system with carbonization and corrosion prevention functions and a preparation method and application thereof. BACKGROUND

[0002] In modern construction engineering, concrete is a widely used structural material in various infrastructures, and its durability is directly related to the service life and safety of buildings. However, concrete is easily eroded by various factors when exposed to natural environments for a long time, leading to performance degradation.

[0003] In open-air environments, concrete is mainly eroded by the following factors: (1) wind and sand erosion: fine particles in wind and sand continuously impact the surface of concrete, causing wear and damage; (2) water erosion: water entering the interior of concrete causes carbonation, freeze-thaw cycles, and an increase in internal micro-cracks; (3) corrosive gases: corrosive gases such as carbon dioxide and hydrogen sulfide in the air can cause carbonation of concrete, which in turn affects the corrosion of steel bars.

[0004] There are various inorganic protection liquids and resin coating products on the market, but they have the following shortcomings: (1) limited penetration depth: the penetration depth of these products is limited, and they cannot form a long-lasting reaction with the internal structure of concrete, resulting in limited protection effect; (2) poor durability: the surface protective layer is prone to cracking and peeling, and cannot maintain the protective effect for a long time; (3) single function: most materials can only achieve single protection or decoration function, and it is difficult to meet the requirements of structural reinforcement and decoration at the same time.

[0005] In view of the above problems, there is an urgent need for a multifunctional and high-stability concrete protection liquid system. Such a system should have the following characteristics: (1) deep penetration: capable of penetrating into the interior of concrete and forming a long-lasting reaction with the internal structure of concrete to improve the protection effect; (2) strong durability: excellent weather resistance and durability to maintain the protection effect for a long time; (3) multifunctionality: capable of simultaneously meeting the requirements of structural reinforcement and decoration, and meeting the engineering requirements of different occasions. SUMMARY

[0006] The primary purpose of the present application is to overcome the shortcomings and deficiencies of the prior art, and to provide a permeable crystalline concrete protection liquid system with carbonization and corrosion prevention functions.

[0007] Another purpose of the present application is to provide a preparation method of the above-mentioned permeable crystalline concrete protection liquid system with carbonization and corrosion prevention functions.

[0008] Still another purpose of the present application is to provide an application of the above-mentioned permeable crystalline concrete protection liquid system with carbonization and corrosion prevention functions.

[0009] The object of the present application is achieved by the technical solution described below: a permeable crystalline concrete protection liquid system with carbonization and corrosion prevention functions, comprising a permeable crystalline inorganic nano concrete protection liquid, a reinforcing colorant, and an organic-inorganic composite resin varnish; wherein, The permeable crystalline inorganic nano concrete protection liquid comprises the following components by mass percentage: 25-35% of silica dispersion liquid A with a concentration of 30% w / w, 1-3% of hydrolyzed silane coupling agent, 30-40% of lithium silicate, 15-20% of potassium silicate, 2-4% of non-hydrolyzed silane coupling agent, 0.5-1.5% of defoaming agent, 0.4-0.6% of wetting dispersant, an appropriate amount of pH adjuster, and the balance of solvent, with a pH of 12.5-13.5; preferably comprising the following components by mass percentage: 25-35% of silica dispersion liquid A with a concentration of 30% w / w, 2% of hydrolyzed silane coupling agent, 30-39% of lithium silicate, 15-19% of potassium silicate, 3% of non-hydrolyzed silane coupling agent, 1% of defoaming agent, 0.5% of wetting dispersant, an appropriate amount of pH adjuster, and the balance of solvent, with a pH of 12.8-13.2; The reinforcing colorant comprises the following components by mass percentage: 15-25% of acrylic ester emulsion, 25-30% of silica dispersion liquid A with a concentration of 30% w / w, 3-6% of potassium silicate, 7-14% of lithium silicate, 4-6% of coloring pigment, 18-22% of filler, 0.5-1.5% of defoaming agent, 0.4-0.6% of wetting dispersant, 0.4-0.6% of leveling agent, 2-4% of freeze-thaw resistance aid, an appropriate amount of pH adjuster, and the balance of solvent, with a pH of 10.5-11.5; preferably comprising the following components by mass percentage: 15-20% of acrylic ester emulsion, 25-28% of silica dispersion liquid A with a concentration of 30% w / w, 3-6% of potassium silicate, 7-14% of lithium silicate, 5% of coloring pigment, 20% of filler, 1% of defoaming agent, 0.5% of wetting dispersant, 0.5% of leveling agent, 3% of freeze-thaw resistance aid, an appropriate amount of pH adjuster, and the balance of solvent, with a pH of 10.8-11.3; The organic-inorganic composite resin varnish comprises the following components by mass percentage: acrylic emulsion 10-20%, styrene-acrylic emulsion 15-25%, silica dispersion liquid B with a concentration of 30% w / w 35-45%, potassium silicate 1-3%, lithium silicate 2-6%, defoaming agent 0.5-1.5%, wetting dispersant 0.4-0.6%, leveling agent 0.4-0.6%, freeze-thaw resistance aid 2-4%, non-hydrolytic silane coupling agent 2-4%, film-forming aid 0.5-1.5%, pH adjuster appropriate amount, solvent balance, and the pH is 12.0-13.5; preferably comprising the following components by mass percentage: acrylic emulsion 10-20%, styrene-acrylic emulsion 15-25%, silica dispersion liquid B with a concentration of 30% w / w 35-45%, potassium silicate 1-3%, lithium silicate 2-6%, defoaming agent 1%, wetting dispersant 0.5%, leveling agent 0.5%, freeze-thaw resistance aid 3%, non-hydrolytic silane coupling agent 3%, film-forming aid 1%, pH adjuster appropriate amount, solvent balance, and the pH is 12.2-13.1. The total of all ingredients is 100% by mass.

[0010] The silica dispersion liquid A is a nano-silica sol with a particle size of 8-10.

[0011] The hydrolytic silane coupling agent is preferably KH560.

[0012] The lithium silicate is preferably lithium silicate with a modulus of 3.0-3.5.

[0013] The potassium silicate is preferably potassium silicate with a modulus of 3.5-4.0.

[0014] The non-hydrolytic silane coupling agent does not contain methoxy and / or ethoxy groups; preferably KRN8027.

[0015] The acrylate emulsion is preferably at least one of BASF 7080 and BASF 4248.

[0016] The filler is preferably at least one of aluminum hydroxide, calcined kaolin, and silicon powder.

[0017] The particle size of the filler is between 800 and 1500.

[0018] The aluminum hydroxide is preferably an industrial group of 1250 mesh, with an Al2O3 content of ≥60%.

[0019] The calcined kaolin is a water-washed kaolin for 1500 mesh water-based coatings.

[0020] The coloring pigment has no special requirements. In order to ensure that the prepared coating has good film effect, the application preferably uses inorganic pigments with good weather resistance as coloring pigments, and the specific amount is determined according to customer requirements.

[0021] The silica dispersion liquid B is a nano-silica sol with a particle size of 10-15 nm.

[0022] The pure acrylic emulsion is preferably at least one of BASF 7016G and BASF 7051.

[0023] The styrene-acrylic emulsion is preferably at least one of BASF 7035 and BASF 296DS.

[0024] The defoaming agent is preferably BASF 2410.

[0025] The wetting dispersant is preferably BASF 4140AS.

[0026] The leveling agent is preferably BYK 333.

[0027] The film-forming aid is preferably alcohol ester-12.

[0028] The pH regulator is preferably AMP95.

[0029] The solvent is preferably water; more preferably deionized water. The permeable crystalline concrete protection liquid system obtained by using water as the solvent is more in line with the requirements of environmental protection.

[0030] A preparation method of a permeable crystalline concrete protection liquid system with carbonation and corrosion prevention functions, comprising the following steps: (1) mixing silica dispersion liquid A, hydrolytic silane coupling agent, lithium silicate, potassium silicate, non-hydrolytic silane coupling agent, defoaming agent, wetting dispersant, pH regulator, and solvent, stirring at a speed of 500-700 rpm at 70-82°C until uniform and transparent, cooling, to obtain a permeable crystalline inorganic nano-concrete protection liquid; (2) mixing acrylate emulsion, silica water dispersion liquid A, potassium silicate, lithium silicate, filler, coloring pigment, wetting dispersant, defoaming agent, pH regulator, leveling agent, freeze-thaw prevention aid, and solvent, stirring uniformly at 60-70°C and 700-900 rpm, cooling, to obtain an enhanced coloring agent; (3) first mixing pure acrylic emulsion and styrene-acrylic emulsion, and then adding pH regulator, non-hydrolytic silane coupling agent, silica dispersion liquid B, potassium silicate, wetting dispersant, defoaming agent, lithium silicate, leveling agent, freeze-thaw prevention aid, film-forming aid, and solvent in sequence under stirring, stirring uniformly at 60-80°C and 700-900 rpm, cooling, to obtain an organic-inorganic composite resin varnish.

[0031] The speed in step (1) is preferably 600 rpm.

[0032] The rotation speed in step (2) is preferably 800 rpm.

[0033] The rotation speed in step (3) is preferably 800 rpm.

[0034] The stirring time in step (3) is preferably 120-240 min; more preferably 180-200 min.

[0035] The above-mentioned permeable crystalline concrete protection liquid system with carbonization and corrosion resistance is applied to the protection scenarios of open-air concrete structures, such as city bridges, expressways, tunnel structures, water conservancy dam structures, underground infrastructure, industrial plant floors, etc. The specific steps include the following: first, the surface of the concrete structure is coated with the permeable crystalline inorganic nano concrete protection liquid, and then cured to form a solid layer, followed by coating with the reinforcing colorant, curing to form a solid layer, and finally coating with the organic-inorganic composite resin varnish, curing to form a solid layer.

[0036] The coating amount of the permeable crystalline inorganic nano concrete protection liquid is preferably 0.15-0.2 kg / m 2 .

[0037] The coating amount of the reinforcing colorant is preferably 0.3-0.35 kg / m 2 .

[0038] The coating amount of the organic-inorganic composite resin varnish is preferably 0.1-0.13 kg / m 2 .

[0039] The present application has the following advantages and effects relative to the prior art: 1. In the protection liquid system provided by the present application: the permeable crystalline inorganic nano concrete protection liquid can penetrate into the concrete surface layer 10-30 mm, and react with Ca 2+ , Al 3+ ions in the concrete to generate insoluble silicate gel, significantly improving the compactness and mechanical properties of the concrete, and forming a waterproof and corrosion-resistant structural barrier inside; the reinforcing colorant is rich in inorganic nano materials and film-forming emulsion, which can continue to react with the concrete surface to further improve the surface strength and achieve uniform and stable color coverage, thereby balancing the structural enhancement and visual aesthetic functions; the organic-inorganic composite resin varnish is a composite of pure acrylic emulsion and styrene-acrylic emulsion, nano silicon dioxide, lithium silicate, silane oligomer, etc., forming a flexible and weather-resistant closed protective layer, significantly enhancing its acid and alkali resistance, salt spray resistance, and ultraviolet resistance. Through the synergistic compounding of organic emulsion and nano inorganic materials, a flexible, weather-resistant, and acid-alkali-resistant surface sealing film layer is formed, which effectively resists external corrosion medium erosion and prolongs the service life of the structure.

[0040] 2. The protective liquid system provided by this invention is applied in layers sequentially during actual use, working synergistically with each layer and undergoing a deep chemical reaction with the concrete substrate. Ultimately, it forms a multi-layered protective mechanism within and on the surface of the concrete structure, providing waterproofing, resistance to carbonation, weathering, and acid and alkali corrosion. The stable structural layer generated by this reaction can achieve a service life of "the same level" as the concrete, significantly improving the overall durability and maintenance cycle of concrete components.

[0041] 3. The protective liquid system provided by this invention not only has excellent advantages such as waterproofing, carbonization resistance, weathering resistance, and acid and alkali corrosion resistance, but also the coloring layer and sealing layer can adapt to different decorative needs. At the same time, it improves surface hardness and weather resistance. The three-layer composite structure provides triple protection in terms of structure, vision, and aesthetics, which is superior to existing single-function materials.

[0042] 4. The protective liquid system provided by this invention meets the requirements for long-term protection of concrete and can be used for protective coating of urban bridges, highways, tunnel structures, water conservancy project dams, underground infrastructure, industrial plant floors, etc. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to embodiments, but the implementation of the present invention is not limited thereto.

[0044] Example A1 The penetrating crystalline inorganic nano concrete protective liquid comprises the following components by mass: 25 parts silica dispersion (8-10 nanometers, 30% concentration), 2 parts hydrolyzable silane coupling agent (KH560), 30 parts lithium silicate (3.0-3.5 modulus), 15 parts potassium silicate (3.5-4.0 modulus), 3 parts non-hydrolyzable silane coupling agent (KRN8027), 1 part defoamer (BASF 2410), 0.5 parts wetting and dispersing agent (BASF 4140AS), 1 part pH adjuster (AMP95), and 22.5 parts deionized water.

[0045] The above components were added to the reactor in sequence and stirred slowly at 70-82 °C until the mixture was dispersed at 600 rpm for 180 minutes until it was uniform and transparent. The mixture was then filtered to obtain a penetrating crystalline inorganic nano-concrete protective liquid with a pH value of 12.8-13.2.

[0046] Example A2 The penetrating crystalline inorganic nano-concrete protective liquid comprises the following components in parts by mass: 35 parts of silica dispersion (8-10 nm, 30% concentration), 2 parts of hydrolyzable silane coupling agent (KH560), 35 parts of lithium silicate (3.0-3.5 modulus), 17 parts of potassium silicate (3.5-4.0 modulus), 3 parts of hydrolyzable silane coupling agent (KRN8027), 1 part of defoamer (BASF 2410), 0.5 parts of wetting and dispersing agent (BASF 4140AS), 1 part of pH adjuster (AMP95), and 5.5 parts of deionized water.

[0047] The above components were added to the reaction vessel in sequence, and the mixture was slowly stirred at 70-82°C and the stirring speed was increased to 600 rpm for 180 minutes until it was uniform and transparent. After filtration, a penetrating crystalline inorganic nano-concrete protective liquid with a pH value of 12.8-13.2 was obtained.

[0048] Example A3 The penetrating crystalline inorganic nano-concrete protective liquid comprises the following components in parts by mass: 30 parts of silica dispersion a (8-10 nm, 30% concentration), 2 parts of hydrolyzable silane coupling agent (KH560), 39 parts of lithium silicate (3.0-3.5 modulus), 19 parts of potassium silicate (3.5-4.0 modulus), 3 parts of hydrolyzable silane coupling agent (KRN8027), 1 part of defoamer (BASF 2410), 0.5 parts of wetting and dispersing agent (BASF 4140AS), 1 part of pH adjuster (AMP95), and 4.5 parts of deionized water.

[0049] The above components were added to the reaction vessel in sequence, and the mixture was slowly stirred at 70-82°C and the stirring speed was increased to 600 rpm for 180 minutes until it was uniform and transparent. After filtration, a penetrating crystalline inorganic nano-concrete protective liquid with a pH value of 12.8-13.2 was obtained.

[0050] Comparative Example A1 The difference from Example A3 is that the silane oligomer is replaced with deionized water, otherwise it is the same as Example A3.

[0051] Comparative Example A2 The difference from Example A3 is that the hydrolysis-free silane coupling agent (KRN8027) is replaced with pure acrylic emulsion (BASF Acronal). ® 7051), the rest is the same as in Example A3.

[0052] Comparative Example A3 The difference from Example A3 is that lithium silicate and potassium silicate are prepared using pure acrylic emulsion (BASF Acronal). ® 7051) Replacement, otherwise the same as in Example A3.

[0053] Comparative Example A4 The difference from Example A3 is that the silica dispersion is replaced with deionized water, otherwise it is the same as Example A3.

[0054] Examples A1-A3 and Comparative Examples A1-A4 were prepared at 0.15-0.2 kg / m³. 2 The product was applied evenly to the surface of concrete with a strength ≥ C25, and after curing for 72 hours, performance tests were conducted. The results are shown in Table 1. Table 1

[0055] Note: JG / T 70 is the testing standard, and NB / T 47013.5 is the testing method. For water resistance, whitening occurring within 48-72 hours is recorded as 48-72h; for water resistance exceeding 72 hours, no whitening or blistering occurs during 72 hours of immersion, and this is recorded as >72h.

[0056] According to Table 1, Example A3 was selected as the penetrating crystalline inorganic nano-concrete protective liquid at a concentration of 0.15-0.2 kg / m³. 2 The amount of product is evenly applied to the surface of concrete with a strength ≥ C25 to obtain a penetrating crystalline inorganic nano concrete protective liquid base layer, which is then cured until solid and used to screen reinforcing colorants.

[0057] Example B1 The coloring enhancer comprises the following components in parts by weight: 15 parts acrylic emulsion (BASF 7080), 25 parts silica dispersion (8-10 nm, 30% concentration), 3 parts potassium silicate (3.5-4.0 modulus), 7 parts lithium silicate (3.0-3.5 modulus), 5 parts coloring pigment (SR-2377 rutile titanium dioxide), 15 parts aluminum hydroxide, 5 parts calcined kaolin, 1 part defoamer (BASF 2410), 0.5 parts wetting and dispersing agent (BASF 4140AS), 0.5 parts leveling agent (BYK333), 1 part pH adjuster (AMP95), 3 parts antifreeze / thaw aid (PG / propylene glycol), and 19 parts deionized water.

[0058] The above components were added to the reaction vessel in sequence, and the stirring speed was slowly increased to 800 rpm for mixing. The temperature was raised to 60-70 ℃, stirred evenly, and then cooled to obtain an enhanced colorant with a pH value of 10.8-11.3.

[0059] Example B2 The coloring enhancer comprises the following components in parts by weight: 20 parts acrylic emulsion (BASF 7080), 25 parts silica dispersion (8-10 nm, 30% concentration), 6 parts potassium silicate (3.5-4.0 modulus), 14 parts lithium silicate (3.0-3.5 modulus), 5 parts coloring pigment (SR-2377 rutile titanium dioxide), 15 parts aluminum hydroxide, 5 parts calcined kaolin, 1 part defoamer (BASF 2410), 0.5 parts wetting and dispersing agent (BASF 4140AS), 0.5 parts leveling agent (BYK333), 1 part pH adjuster (AMP95), 3 parts antifreeze / thaw aid (PG / propylene glycol), and 4 parts deionized water.

[0060] The above components were added to the reaction vessel in sequence, and the stirring speed was slowly increased to 800 rpm for mixing. The temperature was raised to 60-70°C, stirred evenly, and then cooled to obtain an enhanced colorant with a pH value of 10.8-11.3.

[0061] Example B3 The coloring enhancer comprises the following components in parts by weight: 19 parts acrylic emulsion (BASF 7080), 28 parts silica dispersion (8-10 nm, 30% concentration), 5 parts potassium silicate (3.5-4.0 modulus), 10 parts lithium silicate (3.0-3.5 modulus), 5 parts coloring pigment, 15 parts aluminum hydroxide, 5 parts calcined kaolin, 1 part defoamer (BASF 2410), 0.5 parts wetting and dispersing agent (BASF 4140AS), 0.5 parts leveling agent (BYK333), 1 part pH adjuster (AMP95), 3 parts antifreeze / thaw aid (PG / propylene glycol), and 7 parts deionized water.

[0062] The above components were added to the reaction vessel in sequence, and the stirring speed was slowly increased to 800 rpm for mixing. The temperature was raised to 60-70°C, stirred evenly, and then cooled to obtain an enhanced colorant with a pH value of 10.8-11.3.

[0063] Comparative Example B1 The difference from Example B3 is that the silica dispersion is replaced with deionized water, otherwise it is the same as Example B3.

[0064] Comparative Example B2 The difference from Example B3 is that the silica dispersion is replaced with ordinary pure acrylic emulsion (BASF 7051), otherwise it is the same as Example B3.

[0065] Comparative Example B3 The difference from Example B3 is that potassium silicate and lithium silicate are replaced with silica dispersion, otherwise the same as in Example B3.

[0066] Comparative Example B4 The difference from Example B3 is that potassium silicate and lithium silicate are replaced with deionized water, otherwise the same as in Example B3.

[0067] Storage stability tests were conducted on Examples B1-B3 and Comparative Examples B1-B4 at a concentration of 0.3-0.35 kg / m³. 2 The amount of the penetrating crystalline inorganic nano-concrete protective liquid was evenly applied to the surface of concrete with a strength ≥ C25, as described in Example A3, to obtain a reinforcing colorant dyeing layer. After curing for 72 hours, performance tests were conducted. The results are shown in Table 2. Table 2

[0068] According to Table 2, Example B3 was selected as the reinforcing colorant, at a concentration of 0.3-0.35 kg / m³. 2 The product is evenly applied to the surface of the bottom layer of the penetrating crystalline inorganic nano-concrete protective liquid to obtain a coloring layer with enhanced colorant. After curing, it is used for screening organic-inorganic composite resin varnishes.

[0069] Example C1 Organic-inorganic composite resin varnish, comprising the following components in parts by weight: 10 parts of pure acrylic emulsion (BASF 7051), 25 parts of styrene-acrylic emulsion (BASF 296DS), 35 parts of silica dispersion (10-15 nm, 30% concentration), 1 part of defoamer (BASF 2410), 0.5 parts of wetting and dispersing agent (BASF 4140AS), 0.5 parts of leveling agent (BYK333), 1 part of pH adjuster (AMP95), 3 parts of antifreeze-thaw aid (PG / propylene glycol), 3 parts of hydrolysis-free silane coupling agent (KRN8027), 1 part of film-forming aid (alcohol ester-12), 1 part of potassium silicate (3.5-4.0 modulus), 2 parts of lithium silicate (3.0-3.5 modulus), and 17 parts of deionized water.

[0070] First, pure acrylic emulsion and styrene-acrylic emulsion are mixed. Then, AMP-95, silica dispersion, potassium silicate, wetting and dispersing agent, defoamer, hydrolysis-free silane coupling agent, film-forming aid, lithium silicate, leveling agent, antifreeze-thaw aid, and deionized water are added in sequence. The mixture is stirred slowly and the speed is increased to 800 rpm. It is dispersed at 60-80℃ for 190 minutes. After stirring evenly and cooling, an organic-inorganic composite resin varnish with a pH value of 12.2-13.1 is obtained.

[0071] Example C2 Organic-inorganic composite resin varnish, comprising the following components in parts by weight: 20 parts of pure acrylic emulsion (BASF 7051), 15 parts of styrene-acrylic emulsion (BASF 296DS), 45 parts of silica dispersion (10-15 nm), 1 part of defoamer (BASF 2410), 0.5 parts of wetting and dispersing agent (BASF 4140AS), 0.5 parts of leveling agent (BYK333), 1 part of pH adjuster (AMP95), 3 parts of antifreeze-thaw aid (PG / propylene glycol), 3 parts of hydrolysis-free silane coupling agent (KRN8027), 1 part of film-forming aid (alcohol ester-12), 3 parts of potassium silicate (3.5-4.0 modulus), 6 parts of lithium silicate (3.0-3.5 modulus), and 1 part of deionized water.

[0072] First, pure acrylic emulsion and styrene-acrylic emulsion are mixed. Then, AMP-95, silica dispersion, potassium silicate, wetting and dispersing agent, defoamer, hydrolysis-free silane coupling agent, film-forming aid, lithium silicate, leveling agent, antifreeze-thaw aid, and deionized water are added in sequence. The mixture is stirred slowly and the speed is increased to 800 rpm. It is dispersed at 60-80℃ for 190 minutes. After stirring evenly and cooling, an organic-inorganic composite resin varnish with a pH value of 12.2-13.1 is obtained.

[0073] Example C3 Organic-inorganic composite resin varnish, comprising the following components in parts by weight: 19 parts of pure acrylic emulsion (BASF 7051), 20 parts of styrene-acrylic emulsion (BASF 296DS), 40 parts of silica dispersion (10-15 nm), 1 part of defoamer (BASF 2410), 0.5 parts of wetting and dispersing agent (BASF 4140AS), 0.5 parts of leveling agent (BYK333), 1 part of pH adjuster (AMP95), 3 parts of antifreeze-thaw aid (PG / propylene glycol), 3 parts of hydrolysis-free silane coupling agent (KRN8027), 1 part of film-forming aid (alcohol ester-12), 2 parts of potassium silicate (3.5-4.0 modulus), 3 parts of lithium silicate (3.0-3.5 modulus), and 6 parts of deionized water.

[0074] First, pure acrylic emulsion and styrene-acrylic emulsion are mixed. Then, AMP-95, silica dispersion, potassium silicate, wetting and dispersing agent, defoamer, hydrolysis-free silane coupling agent, film-forming aid, lithium silicate, leveling agent, antifreeze-thaw aid, and deionized water are added in sequence. The mixture is stirred slowly and the speed is increased to 800 rpm. It is dispersed at 60-80℃ for 190 minutes. After stirring evenly and cooling, an organic-inorganic composite resin varnish with a pH value of 12.2-13.1 is obtained.

[0075] Comparative Example C1 The difference from Example C3 is that the silica dispersion is replaced with deionized water, otherwise it is the same as Example C3.

[0076] Comparative Example C2 The difference from Example C3 is that the silica dispersion is replaced with ordinary pure acrylic emulsion (BASF 7051), otherwise it is the same as Example C3.

[0077] Comparative Example C3 The difference from Example C3 is that the hydrolysis-free silane coupling agent KRN8027 is replaced with a silane coupling agent (KH560), otherwise it is the same as Example C3.

[0078] Comparative Example C4 The difference from Example C3 is that the hydrolysis-free silane coupling agent KRN8027 is replaced with deionized water, otherwise it is the same as Example C3.

[0079] Storage stability tests were conducted on Examples C1-C3 and Comparative Examples C1-C4, and the reinforced colorant dyeing layer obtained by applying it using Example B3 was uniformly coated at a dosage of 0.3-0.35 kg / m². The results are shown in Table 3. Table 3

[0080] Note: Whitening occurs within 48-72 hours in the water resistance test, recorded as 48-72h; no whitening or bubbling occurs during 72 hours of immersion, recorded as >72h.

[0081] According to Table 3, Example C3 was selected as the organic-inorganic composite resin varnish, with a concentration of 0.1-0.13 kg / m³. 2 The solution is applied evenly to the surface of the reinforcing colorant dyeing layer to obtain an organic-inorganic composite resin varnish protective layer. The resulting sample is obtained from a penetrating crystalline concrete protective liquid system after curing.

[0082] As can be seen from the above, the penetrating crystalline concrete protective liquid meticulously crafted using organic-inorganic composite technology in this invention not only demonstrates superior performance in surface film formation, storage stability, fire retardancy, and pencil hardness testing, but also exhibits these advantages as a result compared to other similar products on the market. This innovative technology undoubtedly brings revolutionary progress to the field of concrete protection.

[0083] The present invention relates to a penetrating crystalline concrete protective liquid system comprising a penetrating crystalline inorganic nano concrete protective liquid, an enhancing colorant, and an organic-inorganic composite resin varnish.

[0084] S1: Example A3 was prepared at a concentration of 0.15-0.2 kg / m³. 2 Apply the solution evenly to the surface of concrete with a strength ≥ C25 to obtain a penetrating crystalline inorganic nano-concrete protective liquid base layer. Cure until hardened and set aside. S2: Example B3 was prepared at a concentration of 0.3-0.35 kg / m³. 2 Apply the mixture evenly to the surface of the bottom layer of the penetrating crystalline inorganic nano-concrete protective liquid to obtain a coloring layer with reinforcing colorant. Cure until hardened and set aside. S3: Example C3 was prepared at a concentration of 0.1-0.13 kg / m³. 2 The solution is evenly applied to the surface of the reinforcing colorant dyeing layer to obtain an organic-inorganic composite resin varnish protective layer. After curing, a sample obtained from the penetrating crystalline concrete protective liquid system is obtained.

[0085] The samples obtained from the prepared penetrating crystalline concrete protective liquid system were manually tested (according to JC / T1018-2020 (carbonation resistance), GB / T8624-2012 (flame retardancy rating), GB / T9274-1988 (chemical resistance), and GB / T6739-2006 (pencil hardness)). The results are shown in Table 4. In actual coating tests over five years, no significant discoloration, powdering, cracking, or other abnormalities were observed, achieving deep protection for concrete structures.

[0086] The following are the performance parameters of the concrete protective liquid system prepared in the examples: Table 4

[0087] This invention employs a penetrating crystalline inorganic nano-concrete protective liquid, a reinforcing colorant, and an organic-inorganic composite resin varnish. Through the synergistic effect of these three components, a robust protective barrier is constructed for concrete, significantly enhancing its durability and visual appeal. This not only endows concrete with excellent weather resistance but also meets its long-term aesthetic requirements in outdoor environments. It achieves deep protection of concrete structures, significantly improving their durability and aesthetics, and meeting the requirements for long-term outdoor applications.

[0088] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions, characterized in that: This includes penetrating crystalline inorganic nano-concrete protective liquid, reinforcing colorant, and organic-inorganic composite resin varnish; among which, The penetrating crystalline inorganic nano-concrete protective liquid contains the following components by mass percentage: 25-35% silica dispersion A (30% w / w), 1-3% hydrolyzable silane coupling agent, 30-40% lithium silicate, 15-20% potassium silicate, 2-4% non-hydrolyzable silane coupling agent, 0.5-1.5% defoamer, 0.4-0.6% wetting and dispersing agent, appropriate amount of pH adjuster, and the remainder of solvent, with a pH of 12.5-13.5; The coloring enhancer comprises the following components by mass percentage: 15-25% acrylate emulsion, 25-30% silica dispersion A (30% w / w), 3-6% potassium silicate, 7-14% lithium silicate, 4-6% coloring pigment, 18-22% filler, 0.5-1.5% defoamer, 0.4-0.6% wetting and dispersing agent, 0.4-0.6% leveling agent, 2-4% antifreeze-thaw aid, appropriate amount of pH adjuster, and the remainder of solvent, with a pH of 10.5-11.5; The organic-inorganic composite resin varnish contains the following components by mass percentage: 10-20% pure acrylic emulsion, 15-25% styrene-acrylic emulsion, 35-45% silica dispersion B with a concentration of 30% w / w, 1-3% potassium silicate, 2-6% lithium silicate, 0.5-1.5% defoamer, 0.4-0.6% wetting and dispersing agent, 0.4-0.6% leveling agent, 2-4% antifreeze-thaw aid, 2-4% hydrolyzed silane coupling agent, 0.5-1.5% film-forming aid, appropriate amount of pH adjuster, and the remainder of solvent, with a pH of 12.0-13.

5.

2. The penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions according to claim 1, characterized in that: The described penetrating crystalline inorganic nano-concrete protective liquid contains the following components by mass percentage: 25-35% silica dispersion A at a concentration of 30% w / w, 2% hydrolyzable silane coupling agent, 30-39% lithium silicate, 15-19% potassium silicate, 3% non-hydrolyzable silane coupling agent, 1% defoamer, 0.5% wetting and dispersing agent, appropriate amount of pH adjuster, and the remainder of solvent, with a pH of 12.8-13.

2.

3. The penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions according to claim 1, characterized in that: The enhanced colorant comprises the following components by mass percentage: 15-20% acrylate emulsion, 25-28% silica dispersion A at a concentration of 30% w / w, 3-6% potassium silicate, 7-14% lithium silicate, 5% coloring pigment, 20% filler, 1% defoamer, 0.5% wetting and dispersing agent, 0.5% leveling agent, 3% antifreeze-thaw aid, appropriate amount of pH adjuster, and the remainder of solvent, with a pH of 10.8-11.

3.

4. The penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions according to claim 1, characterized in that: The organic-inorganic composite resin varnish comprises the following components by mass percentage: 10-20% pure acrylic emulsion, 15-25% styrene-acrylic emulsion, 35-45% silica dispersion B with a concentration of 30% w / w, 1-3% potassium silicate, 2-6% lithium silicate, 1% defoamer, 0.5% wetting and dispersing agent, 0.5% leveling agent, 3% antifreeze-thaw aid, 3% hydrolyzed silane coupling agent, 1% film-forming aid, appropriate amount of pH adjuster, and the remainder of solvent, with a pH of 12.2-13.

1.

5. The penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions according to any one of claims 1 to 4, characterized in that: The silica dispersion A is a nano-silica sol with a particle size of 8-10 nm; The hydrolytic silane coupling agent is KH560; The hydrolysis-free silane coupling agent is KRN8027; The silica dispersion B is a nano-silica sol with a particle size of 10-15. The filler is at least one of aluminum hydroxide, calcined kaolin, and silica powder; The coloring pigment is an inorganic pigment; The defoamer mentioned is BASF 2410; The wetting and dispersing agent is BASF 4140AS; The leveling agent mentioned is BYK 333; The film-forming aid is alcohol ester-12; The pH adjuster is AMP95; The solvent is water.

6. The penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions according to any one of claims 1 to 4, characterized in that: The lithium silicate mentioned is lithium silicate with a modulus of 3.0-3.5; The potassium silicate mentioned is potassium silicate with a modulus of 3.5-4.0; The acrylate emulsion is at least one of BASF 7080 and BASF 4248; The pure acrylic emulsion is at least one of BASF 7016G and BASF 7051; The styrene-acrylic emulsion is at least one of BASF 7035 and BASF 296DS.

7. The method for preparing the penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions according to any one of claims 1 to 6, characterized in that... Includes the following steps: (1) Mix silica dispersion A, hydrolyzable silane coupling agent, lithium silicate, potassium silicate, hydrolyzable silane coupling agent, defoamer, wetting and dispersing agent, pH adjuster and solvent, stir at 70-82℃ and 500-700rpm until uniform and transparent, cool to obtain penetrating crystallization inorganic nano concrete protective liquid. (2) Mix the acrylate emulsion, silica aqueous dispersion A, potassium silicate, lithium silicate, filler, coloring pigment, wetting and dispersing agent, defoamer, pH adjuster, leveling agent, antifreeze and thaw aid and solvent, stir evenly at 60-70℃ and 700-900rpm, and cool to obtain the enhanced coloring agent; (3) First, mix the pure acrylic emulsion and the styrene-acrylic emulsion. Then, while stirring, add the pH adjuster, hydrolysis-free silane coupling agent, silica dispersion B, potassium silicate, wetting and dispersing agent, defoamer, lithium silicate, leveling agent, antifreeze-thaw aid, film-forming aid and solvent in sequence. Stir evenly at 60-80℃ and 700-900rpm, and cool to obtain organic-inorganic composite resin varnish.

8. The application of the penetrating crystalline concrete protective liquid system with anti-carbonation and anti-corrosion functions as described in any one of claims 1 to 6 in the protection of concrete structures.

9. The application according to claim 8, characterized in that: The concrete structures mentioned are urban bridges, highways, tunnel structures, water conservancy project dams, underground infrastructure, or industrial plant floors.

10. The application according to claim 8 or 9, characterized in that... The process includes the following steps: first, the surface of the concrete structure is coated with the described penetrating crystalline inorganic nano concrete protective liquid and cured until solid. Then, the surface is coated with the described reinforcing colorant and cured until solid. Finally, the surface is coated with the described organic-inorganic composite resin varnish and cured until solid.

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