A composite protective material for repairing surface of cement concrete member and its preparation method and construction method

Abstract

The application discloses a composite protective material for repairing a cement concrete component surface and a preparation method and a construction method thereof. The composite protective material for repairing the cement concrete component surface comprises, from inside to outside, a water-soluble organosilane spraying material layer, a cement-based repairing material layer, a resin-based high-molecular coating material layer and a miscible water-based paint material layer. The water-soluble organosilane spraying material layer comprises the following raw material components in mass fractions: 10-20 parts of organosilicon, 4-8 parts of nano silicon dioxide, 20-40 parts of isooctyl triethoxysilane, 20-40 parts of cage-type silsesquioxane, 10-15 parts of silane adsorbent and 10-15 parts of silane coupling agent. The cement-based repairing material layer comprises the following raw material components in mass fractions: 30-75 parts of early-strength and fast-drying cement-based repairing mortar and 10-25 parts of water containing 8-10% water-soluble silane. The prepared composite protective material can repair and protect the existing concrete from inside to outside in all directions and effectively prevent the erosion of moisture, chemicals and the natural environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a composite protective material for repairing the surface of a cement concrete component and a preparation method and construction method thereof. BACKGROUND

[0002] The anti-collision wall of a cement concrete bridge is inevitably deteriorated due to the influence of air, water and even deicing salt, resulting in weakening of the appearance and function. The existing technology generally protects the concrete by spraying a water-based paint on the surface of the concrete after repairing the concrete. However, since the shrinkage coefficients of the paint and the concrete are inconsistent, the paint is very easy to crack, and rainwater seeping into the concrete from the cracks in the paint will soon cause the paint on the surface of the concrete to swell and fall off, resulting in failure of protection.

[0003] Traditional coastal engineering concrete generally adopts salt corrosion resistant dense concrete technology, and high concentration organic solvent type silane impregnated material surface impregnation protection is also adopted in necessary parts, which can achieve good effect and maintain a certain protection duration. However, the high concentration organic solvent type silane impregnated material is not only expensive, but also complex in engineering construction, and the actual protection effect of single silane impregnation is also limited. In particular, this technical measure is not suitable for the protection needs of a large number of concrete engineering such as expressway, and it is necessary to develop more convenient construction, economic and suitable engineering protection measures and material technology. As a widely used building material, the surface of concrete is easily eroded by external environment such as moisture and chemicals, resulting in reduced durability of the concrete structure. The existing protective material is mostly single coating, and the protection effect is also limited, and the durability is poor. In order to improve the long-term durability of the anti-collision wall protection and use effect of the expressway concrete bridge, it is of great significance to develop a concrete repair and protective material with multi-layer structure and excellent comprehensive protection performance. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a composite protective material for repairing the surface of a cement concrete component and a preparation method and construction method thereof.

[0005] In a first aspect, the present application provides a composite protective material for repairing the surface of a cement concrete component, which adopts the following technical solution:

[0006] The composite protective material for repairing the surface of a cement concrete component comprises a water-soluble organic silane spraying material layer, a cement-based repair material layer, a resin-based high molecular film coating material layer and a miscible water-based paint material layer. The cement-based repair material layer is arranged between the water-soluble organic silane spraying material layer and the resin-based high molecular film coating material layer, and the miscible water-based paint material layer is arranged on the outer side of the resin-based high molecular film coating material layer.

[0007] In one specific embodiment, the composite protective material for repairing the surface of the cement concrete component is a multi-layer composite material, which comprises, from inside to outside, a water-soluble organosilane spraying material layer, a cement-based repair material layer, a resin-based high polymer coating material layer, and a miscible water-based paint material layer.

[0008] By adopting the above technical solution, the composite protective material for repairing the surface of the cement concrete component comprises the water-soluble organosilane spraying material layer, the cement-based repair material layer, the resin-based high polymer coating material layer, and the miscible water-based paint material layer, can repair and protect the concrete from all directions, effectively prevent the erosion of moisture, chemicals and natural environment, significantly improve the durability, compressive strength and water resistance of the concrete, and make the composite protective material for repairing the surface of the cement concrete component have excellent protective performance.

[0009] Preferably, the water-soluble organosilane spraying material layer comprises the following raw material components in mass fraction: 10-20 parts of organosilicon, 4-8 parts of nano-silicon dioxide, 20-40 parts of isooctyl triethoxysilane, 20-40 parts of cage-type silsesquioxane, 10-15 parts of silane adsorbent, and 10-15 parts of silane coupling agent.

[0010] By adopting the above technical solution, the water-soluble organosilane spraying material is prepared by taking organosilicon, nano-silicon dioxide, isooctyl triethoxysilane, cage-type silsesquioxane, silane adsorbent, and silane coupling agent as raw materials, the water-soluble organosilane spraying material is sprayed on the concrete, and a layer of water-soluble organosilane spraying material with good adhesion, compressive strength, durability and water resistance is formed on the surface of the concrete.

[0011] The water-soluble organosilane spraying material takes water as a solvent, does not emit volatile organic compounds, and meets the environmental protection requirements.

[0012] Preferably, the cement-based repair material layer comprises the following raw material components in mass fraction: 30-75 parts of cement-based repair mortar, and 10-25 parts of water containing 8-10% mass concentration of water-soluble silane.

[0013] By adopting the above technical solution, the cement-based repair material layer raw material is prepared by taking the cement-based repair mortar and the water containing 8-10% mass concentration of water-soluble silane as raw materials, and the surface of the concrete is repaired.

[0014] Preferably, the raw material of the resin-based high polymer coating material layer is a two-component water-based epoxy resin, the two-component water-based epoxy resin comprises component A and component B; the mass ratio of the component A to the component B is (0.8-1.2):1.

[0015] The component A comprises the following raw material components in mass fraction: bisphenol A type epoxy resin 40-50 parts, tetrabutyl ammonium bromide 0.5-1 part, lactic acid 8-12 parts, and water 30-50 parts.

[0016] The B component is a mixture of a curing agent and a diluent, and the mass ratio of the curing agent to the diluent is 1:(0.01-0.03).

[0017] By adopting the technical scheme, the raw material of the resin high polymer coating material layer is a two-component water-based epoxy resin, so that the resin high polymer coating material layer prepared has good adhesion and flexibility, can adapt to the slight deformation of the concrete surface, and ensures the durability of the protection effect.

[0018] Preferably, the miscible water-based paint material layer comprises the following raw material components in mass fraction: water-based paint base resin 30-50 parts, pigment 10-20 parts, filler 10-20 parts, additive 5-15 parts, and water containing 8-10% mass concentration of water-soluble silane 10-25 parts.

[0019] By adopting the technical scheme, the miscible water-based paint material layer uses water-based paint base resin, pigment, filler, additive, and water containing 8-10% mass concentration of water-soluble silane as raw materials, and the prepared miscible water-based paint material layer has excellent weather resistance and decorative properties, can provide an aesthetic appearance for the concrete surface, and at the same time protect the concrete from the erosion of natural environment such as ultraviolet rays and acid rain.

[0020] The miscible water-based paint material uses water as a solvent, does not emit volatile organic compounds, and meets environmental protection requirements.

[0021] Preferably, the silane adsorbent comprises the following raw material components in mass fraction: kaolin 13-18 parts, bentonite 5-10 parts, diatomite 20-25 parts, polyborosiloxane 15-20 parts, magnesium chloride 8-14 parts, and silicon dioxide / titanium nitride composite material 8-16 parts.

[0022] By adopting the technical scheme, the raw materials of the silane adsorbent are improved in the present application, and the silicon dioxide / titanium nitride composite material with hydrophobic properties and adsorption properties is added, so that the hydrophobic properties and excellent adsorption properties of the cement concrete member surface composite protection material are further improved.

[0023] Preferably, the silicon dioxide / titanium nitride composite material comprises the following raw material components in mass fraction: titanium nitride nanometer microspheres 1-5 parts, silicon dioxide nanometer microspheres 1-5 parts, first silane coupling agent 2-4 parts, second silane coupling agent 1-3 parts, octadecyl methacrylate 1-5 parts, 2,2'-azobis isobutyronitrile 0.02-0.1 parts, and adhesive 0.5-1.5 parts.

[0024] Preferably, the silica / titanium nitride composite material further comprises 1-5 parts by mass of the silicon-aluminum-containing porous material.

[0025] Preferably, the silicon-aluminum-containing porous material comprises the following raw material components in parts by mass: diatomite filter aid 5-15 parts, aluminum hydroxide 10-20 parts, sodium hydroxide 1-5 parts, and water 10-50 parts.

[0026] Preferably, the method for preparing the silicon-aluminum-containing porous material comprises the following steps: mixing sodium hydroxide and water, adding diatomite filter aid and aluminum hydroxide, and mixing, and aging at 30-40°C to obtain the silicon-aluminum-containing porous material.

[0027] By using the above technical solution, the diatomite filter aid is used as a silicon source to react with sodium hydroxide and aluminum hydroxide to prepare the silicon-aluminum-containing porous material which has excellent ion adsorption performance, a large specific surface area, and obvious pore characteristics, can adsorb chloride ions, and reduces the damage of chloride ions to the durability of the concrete structure.

[0028] Preferably, the method for preparing the silica / titanium nitride composite material comprises the following steps:

[0029] The titanium nitride nanometer microspheres and the silica nanometer microspheres are mixed with the first silane coupling agent, then methyl octadecyl acrylate and 2,2'-azobis isobutyronitrile are added and mixed to obtain modified particles;

[0030] The modified particles are mixed with the silicon-aluminum-containing porous material and the second silane coupling agent, and then mixed with the adhesive to obtain the silica / titanium nitride composite material.

[0031] By using the above technical solution, the titanium nitride nanometer microspheres and the silica nanometer microspheres are used as raw materials and are hydrophobically modified to obtain modified particles with hydrophobic function, the prepared modified particles are mixed with the silicon-aluminum-containing porous material under the action of the silane coupling agent to obtain the silica / titanium nitride composite material, and the prepared silica / titanium nitride composite material is mixed with other raw materials, so that the prepared water-soluble organosilane spray material layer has hydrophobicity and can adsorb chloride ions, reducing the damage of chloride ions to the durability of the concrete structure.

[0032] In the second aspect, the application provides a method for preparing a composite protective material for repairing the surface of a cement concrete component, which adopts the following technical solution:

[0033] A method for preparing a composite protective material for repairing the surface of a cement concrete component, which comprises the following steps:

[0034] (1) Preparation of raw materials for the water-soluble organosilane spray material layer:

[0035] Weigh each raw material according to the formula;

[0036] After mixing isooctyl triethoxysilane, cage silsesquioxane and silane adsorbent, add silicone and nanosilica, then add silane coupling agent dropwise at 50℃, and react for 1h after dropping, to obtain water-soluble organosilane spray material layer raw material;

[0037] (2) Preparation of cement-based repair material layer raw material:

[0038] Weigh each raw material according to the formula;

[0039] Mix cement-based repair mortar and water containing 8-10% mass concentration of water-soluble silane to obtain cement-based repair material layer raw material;

[0040] (3) Preparation of resin-based high molecular film coating material layer raw material:

[0041] Weigh each raw material according to the formula;

[0042] Preparation of component A:

[0043] Mix bisphenol A type epoxy resin, tetrabutylammonium bromide, lactic acid and water to obtain component A;

[0044] Preparation of component B:

[0045] Mix curing agent and diluent to obtain component B;

[0046] Mix component A and component B, and add water to adjust the viscosity to obtain resin-based high molecular film coating material layer raw material;

[0047] Weigh each raw material according to the formula;

[0048] Mix water-based paint binder resin, pigment, filler, additive and water containing 8-10% mass concentration of water-soluble silane to obtain miscible water-based paint material layer raw material.

[0049] In a third aspect, the application provides a construction method of a composite protective material for repairing the surface of a cement concrete member, which adopts the following technical scheme:

[0050] A construction method of a composite protective material for repairing the surface of a cement concrete member, wherein the construction method comprises the following steps:

[0051] (1) Clean the surface of the concrete;

[0052] (2) adding water to the water-soluble organosilane spray material layer raw material, diluting into a mixture with a mass concentration of 15-20%, spraying the mixture onto the concrete surface, and standing for 1-2 hours to form a water-soluble organosilane spray material layer on the concrete surface;

[0053] (3) using the cement-based repair material layer raw material to repair the concrete surface to obtain a cement-based repair material layer;

[0054] (4) brushing the resin-based polymer film coating material layer raw material onto the surface of the cement-based repair material layer, standing for 1-2 hours to form a resin-based polymer film coating material layer on the surface;

[0055] (5) spraying the miscible water-based paint material layer raw material onto the surface of the resin-based polymer film coating material layer, standing for 1-2 hours to form a miscible water-based paint material layer on the surface.

[0056] The composite protective material for repairing the surface of a cement concrete component can be applied to components such as concrete bridge crash walls and bridge piers.

[0057] In summary, the present application has at least one of the following beneficial technical effects:

[0058] The present application discloses a composite protective material for repairing the surface of a cement concrete component and a preparation method and a construction method thereof. The composite protective material for repairing the surface of a cement concrete component comprises a water-soluble organosilane spray material layer, a cement-based repair material, a resin-based polymer film coating material layer, and a miscible water-based paint material layer. The composite protective material can repair and protect old concrete from the inside to the outside, effectively prevent the erosion of moisture, chemicals, and the natural environment, and effectively improve the compressive strength, water resistance, impermeability, and chloride ion penetration resistance of the concrete. DETAILED DESCRIPTION

[0059] The technical solutions of the present application are further described below through specific examples, and the specific examples do not represent a limitation on the protection scope of the present application. Some non-essential modifications and adjustments made by others according to the concept of the present application still fall within the protection scope of the present application.

[0060] The raw materials involved in the present application are all commercially available products, wherein,

[0061] Diatomite filter aid, purchased from Henan Boxu Environmental Protection Co., Ltd.;

[0062] Titanium nitride nanometer microspheres, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0063] Silicon dioxide nanometer microspheres, purchased from Xi'an Qiyue Biological Technology Co., Ltd.;

[0064] Octadecyl methacrylate, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0065] 2,2'-azobisisobutyronitrile, purchased from Shanghai Macklin Biochemical Technology Co., Ltd.;

[0066] Adhesive, E-51 epoxy resin, (C 11 H 12 O3) n , purchased from Nantong Xingchen Phoenix Material Co., Ltd.;

[0067] Silicone, model Silres BS290;

[0068] Nanoscale silicon dioxide, density 2.2 kg / m 3 , active ingredient content 99%, Jiangsu Puleisi Biological Technology Co., Ltd.;

[0069] Bisphenol A type epoxy resin, product number jER828EL, purchased from Mitsubishi Chemical Corporation;

[0070] The relative molecular mass of the cage-type silsesquioxane is 2500-3000.

[0071] The cement-based repair mortar used in the examples of the present application is an early-strength and fast-drying cement-based repair mortar, purchased from Jiangsu Nuelan New Material Co., Ltd., with a vertical expansion of 0.02% and a compressive strength of 60 MPa; the water-soluble silane used is isooctyl triethoxysilane.

[0072] In the preparation of the early-strength and fast-drying cement-based repair material layer raw material in the examples of the present application, engineering structure glue can be added according to actual conditions to facilitate the increase of the viscosity of the cement-based repair material.

[0073] The present application will be further described in detail below in combination with examples and comparative examples.

[0074] Preparation Example 1:

[0075] Preparation of silicon-aluminum-containing porous material:

[0076] The silicon-aluminum-containing porous material comprises the following raw material components: diatomite filter aid 10 kg, aluminum hydroxide 15 kg, sodium hydroxide 3 kg, and water 20 kg.

[0077] The preparation method of the silicon-aluminum-containing porous material is as follows: after mixing sodium hydroxide and water, diatomite filter aid and aluminum hydroxide are added and mixed, the solution is aged at 40℃ for 30 minutes, the solution after aging reaction is placed in an oven at 110℃ for reaction for 5 hours, cooled to room temperature, filtered, washed to neutral, and dried in an oven at 105℃ for 12 hours to obtain the silicon-aluminum-containing porous material.

[0078] Preparation of silicon dioxide / titanium nitride composite material:

[0079] Silica / titanium nitride composite material, comprising the following raw material components: titanium nitride nanospheres 3 kg, silica nanospheres 3 kg, silane coupling agent KH-570 5 kg, octadecyl methacrylate 3 kg, 2,2'-azobisisobutyronitrile 0.07 kg, adhesive (E-51 epoxy resin) 1 kg, and silicon-aluminum-containing porous material 3 kg.

[0080] Method for preparing silica / titanium nitride composite material, comprising the following steps: mixing titanium nitride nanospheres, silica nanospheres, and silane coupling agent KH-570 3 kg, ethanol 30 mL, and water 10 mL under magnetic stirring, adjusting the pH to 4-5 with acetic acid, reacting the mixture at 60°C for 2 hours, purifying the solution by centrifugation and washing with ethanol, dispersing the product in ethanol 25 mL, adding octadecyl methacrylate and 2,2'-azobisisobutyronitrile, and stirring at 60°C for 1.5 hours to obtain modified particles.

[0081] Mixing the modified particles with silicon-aluminum-containing porous material, silane coupling agent KH-570 2 kg, and water 10 mL, and then adding adhesive (E-51 epoxy resin) to obtain silica / titanium nitride composite material.

[0082] Preparation Example 2:

[0083] Preparation of silicon-aluminum-containing porous material:

[0084] Silicon-aluminum-containing porous material, comprising the following raw material components: diatomite filter aid 5 kg, aluminum hydroxide 10 kg, sodium hydroxide 1 kg, and water 10 kg.

[0085] Method for preparing silicon-aluminum-containing porous material, comprising the following steps: mixing sodium hydroxide and water, adding diatomite filter aid and aluminum hydroxide, aging the solution at 40°C for 30 minutes, placing the solution after the aging reaction into an oven at 110°C for 5 hours of reaction, cooling to room temperature, filtering, washing to neutral, and drying in an oven at 105°C for 12 hours to obtain silicon-aluminum-containing porous material.

[0086] Preparation of silica / titanium nitride composite material:

[0087] Silica / titanium nitride composite material, comprising the following raw material components: titanium nitride nanospheres 1 kg, silica nanospheres 1 kg, silane coupling agent KH-570 3 kg, octadecyl methacrylate 1 kg, 2,2'-azobisisobutyronitrile 0.02 kg, adhesive (E-51 epoxy resin) 0.5 kg, and silicon-aluminum-containing porous material 1 kg.

[0088] The preparation method of the silicon dioxide / titanium nitride composite material is as follows: under magnetic stirring, titanium nitride nanospheres, silicon dioxide nanospheres, and silane coupling agent KH-570 2 kg, ethanol 30 mL, and water 10 mL are mixed, then the pH is adjusted to 4-5 with acetic acid, the mixture is reacted at 60°C for 2 hours, the solution is purified by centrifugation and washed with ethanol, the product is dispersed in ethanol 25 mL, then octadecyl methacrylate and 2,2'-azobisisobutyronitrile are added and mixed, and stirring is carried out at 60°C for 1.5 hours to obtain modified particles.

[0089] The modified particles are mixed with a silicon-aluminum-containing porous material, silane coupling agent KH-570 1 kg, and water 10 mL, and then mixed with an adhesive (E-51 epoxy resin) to obtain a silicon dioxide / titanium nitride composite material.

[0090] Preparation Example 3:

[0091] Preparation of a silicon-aluminum-containing porous material:

[0092] The silicon-aluminum-containing porous material includes the following raw material components: diatomite filter aid 15 kg, aluminum hydroxide 20 kg, sodium hydroxide 5 kg, and water 50 kg.

[0093] The preparation method of the silicon-aluminum-containing porous material is as follows: sodium hydroxide and water are mixed, then diatomite filter aid and aluminum hydroxide are added and mixed, the solution is aged at 40°C for 30 minutes, the aged solution is placed in an oven at 110°C for 5 hours of reaction, cooled to room temperature, filtered, washed to neutral, and dried in an oven at 105°C for 12 hours to obtain a silicon-aluminum-containing porous material.

[0094] Preparation of a silicon dioxide / titanium nitride composite material:

[0095] The silicon dioxide / titanium nitride composite material includes the following raw material components: titanium nitride nanospheres 5 kg, silicon dioxide nanospheres 5 kg, silane coupling agent KH-570 7 kg, octadecyl methacrylate 5 kg, 2,2'-azobisisobutyronitrile 0.1 kg, adhesive (E-51 epoxy resin) 1.5 kg, and silicon-aluminum-containing porous material 5 kg.

[0096] The preparation method of the silica / titanium nitride composite material is as follows: under magnetic stirring, titanium nitride nanospheres, silica nanospheres, 4 kg of silane coupling agent KH-570, 30 mL of ethanol, and 10 mL of water are mixed, then the pH is adjusted to 4-5 with acetic acid, the mixture is reacted at 60°C for 2 hours, the solution is purified by centrifugation and washed with ethanol, the product is dispersed in 25 mL of ethanol, then octadecyl methacrylate and 2,2'-azobisisobutyronitrile are added and mixed, and stirring is performed at 60°C for 1.5 hours to obtain modified particles;

[0097] The modified particles are mixed with a silicon-aluminum-containing porous material, 3 kg of silane coupling agent KH-570, and 10 mL of water, and then mixed with an adhesive (E-51 epoxy resin) to obtain a silica / titanium nitride composite material.

[0098] Preparation Example 4:

[0099] Preparation of a silane adsorbent:

[0100] The silane adsorbent comprises the following raw material components: 15 kg of kaolin, 7 kg of bentonite, 23 kg of diatomite, 18 kg of polyborosiloxane, 11 kg of magnesium chloride, and 12 kg of a silica / titanium nitride composite material.

[0101] The silica / titanium nitride composite material is prepared according to Preparation Example 1.

[0102] The preparation method of the silane adsorbent is as follows:

[0103] (1) The polyborosiloxane is placed in a high-speed mixer, and the temperature is adjusted to 180°C until the polyborosiloxane is completely melted;

[0104] (2) The kaolin, bentonite, and diatomite are uniformly dispersed in the polyborosiloxane to obtain a blend;

[0105] (3) The blend is calcined at high temperature and pulverized to a micron-level porous structure;

[0106] (4) The porous structure is added to 120 g of water, and the silica / titanium nitride composite material is added and uniformly stirred;

[0107] (5) The magnesium chloride is added and stirred uniformly to obtain a silane adsorbent.

[0108] Preparation Example 5:

[0109] Preparation of a silane adsorbent:

[0110] The silane adsorbent comprises the following raw material components: 15 kg of kaolin, 7 kg of bentonite, 23 kg of diatomite, 18 kg of polyborosiloxane, 11 kg of magnesium chloride, and 12 kg of a silica / titanium nitride composite material.

[0111] The silica / titanium nitride composite material is prepared from Preparation Example 2.

[0112] The preparation method of the silane adsorbent is as follows:

[0113] (1) Put the polyborosiloxane into a high-speed mixer, adjust the temperature to 180°C, and wait until the polyborosiloxane is completely melted;

[0114] (2) Disperse the kaolin, bentonite, and diatomite uniformly in the polyborosiloxane to obtain a blend;

[0115] (3) High-temperature calcine the blend and crush it into a micrometer-level porous structure;

[0116] (4) Add the porous structure into 120 g of water, and then add the silica / titanium nitride composite material and uniformly stir;

[0117] (5) Add magnesium chloride and uniformly stir to obtain the silane adsorbent.

[0118] Preparation Example 6:

[0119] Preparation of the silane adsorbent:

[0120] The silane adsorbent comprises the following raw material components: kaolin 15 kg, bentonite 7 kg, diatomite 23 kg, polyborosiloxane 18 kg, magnesium chloride 11 kg, and silica / titanium nitride composite material 12 kg.

[0121] The silica / titanium nitride composite material is prepared from Preparation Example 3.

[0122] The preparation method of the silane adsorbent is as follows:

[0123] (1) Put the polyborosiloxane into a high-speed mixer, adjust the temperature to 180°C, and wait until the polyborosiloxane is completely melted;

[0124] (2) Disperse the kaolin, bentonite, and diatomite uniformly in the polyborosiloxane to obtain a blend;

[0125] (3) High-temperature calcine the blend and crush it into a micrometer-level porous structure;

[0126] (4) Add the porous structure into 120 g of water, and then add the silica / titanium nitride composite material and uniformly stir;

[0127] (5) Add magnesium chloride and uniformly stir to obtain the silane adsorbent.

[0128] Preparation Example 7:

[0129] Preparation of the silane adsorbent:

[0130] The silane adsorbent comprises the following raw material components: 13 kg of kaolin, 5 kg of bentonite, 20 kg of diatomite, 15 kg of polyborosiloxane, 8 kg of magnesium chloride, and 8 kg of silicon dioxide / titanium nitride composite material.

[0131] The silicon dioxide / titanium nitride composite material is prepared according to Preparation Example 2.

[0132] The preparation method of the silane adsorbent comprises the following steps:

[0133] (1) Put the polyborosiloxane into a high-speed mixer, and adjust the temperature to 180°C until the polyborosiloxane is completely melted;

[0134] (2) Disperse the kaolin, bentonite, and diatomite uniformly in the polyborosiloxane to obtain a blend;

[0135] (3) High-temperature calcine the blend, and crush to a micron-level porous structure;

[0136] (4) Add the porous structure into 120 g of water, and then add the silicon dioxide / titanium nitride composite material, and uniformly stir;

[0137] (5) Add the magnesium chloride, and uniformly stir to obtain the silane adsorbent.

[0138] Preparation Example 8:

[0139] Preparation of the silane adsorbent:

[0140] The silane adsorbent comprises the following raw material components: 18 kg of kaolin, 10 kg of bentonite, 25 kg of diatomite, 20 kg of polyborosiloxane, 14 kg of magnesium chloride, and 16 kg of silicon dioxide / titanium nitride composite material.

[0141] The silicon dioxide / titanium nitride composite material is prepared according to Preparation Example 3.

[0142] The preparation method of the silane adsorbent comprises the following steps:

[0143] (1) Put the polyborosiloxane into a high-speed mixer, and adjust the temperature to 180°C until the polyborosiloxane is completely melted;

[0144] (2) Disperse the kaolin, bentonite, and diatomite uniformly in the polyborosiloxane to obtain a blend;

[0145] (3) High-temperature calcine the blend, and crush to a micron-level porous structure;

[0146] (4) Add the porous structure into 120 g of water, and then add the silicon dioxide / titanium nitride composite material, and uniformly stir;

[0147] (5) Add the magnesium chloride, and uniformly stir to obtain the silane adsorbent.

[0148] Example 1

[0149] A preparation method of a composite protective material for repairing the surface of a cement concrete member, the steps of which are as follows:

[0150] (1) Preparation of a water-soluble organosilane spray material layer:

[0151] The water-soluble organosilane spray material layer uses materials including the following raw material components:

[0152] 15 kg of organosilicon, 6 kg of nanosilica, 30 kg of isooctyl triethoxysilane, 30 kg of cage-type silsesquioxane, 13 kg of silane adsorbent, and 13 kg of silane coupling agent KH-570.

[0153] The silane adsorbent is prepared according to Preparation Example 4.

[0154] The water-soluble organosilane spray material layer uses materials prepared according to the following steps:

[0155] After mixing the isooctyl triethoxysilane, cage-type silsesquioxane, and silane adsorbent, adding the organosilicon and nanosilica, and mixing, the silane coupling agent KH-570 and 70 kg of water are added and mixed to obtain the water-soluble organosilane spray material layer.

[0156] (2) Preparation of raw materials for an early-strength and fast-drying type cement-based repair material layer:

[0157] The early-strength and fast-drying type cement-based repair material layer uses materials including the following raw material components:

[0158] 55 kg of early-strength and fast-drying type cement-based repair mortar and 15 parts of water containing 9% by mass of water-soluble silane.

[0159] The early-strength and fast-drying type cement-based repair material layer uses materials prepared according to the following steps:

[0160] The early-strength and fast-drying type cement-based repair mortar and water containing 9% by mass of water-soluble silane are mixed to obtain the raw materials for the early-strength and fast-drying type cement-based repair material layer.

[0161] (3) Preparation of a resin-based high-molecular film coating material layer:

[0162] The resin-based high-molecular film coating material layer uses a two-component water-based epoxy resin, which includes component A and component B; the mass ratio of the component A to the component B is 1:1 (ratio of epoxy equivalent to active hydrogen equivalent).

[0163] The component A includes the following mass fraction of raw material components: bisphenol A type epoxy resin 45 kg, tetrabutylammonium bromide 0.8 kg, lactic acid 10 kg, and water 40 kg;

[0164] The B component is a mixture of 1 kg of curing agent and 0.02 kg of diluent, wherein the diluent is ethylene glycol diglycidyl ether; the curing agent is polyetheramine D230.

[0165] The resin-based polymer film material layer, the preparation method steps of the used material are as follows:

[0166] Preparation of component A:

[0167] The bisphenol A type epoxy resin, tetrabutylammonium bromide, lactic acid, and water are mixed to obtain component A;

[0168] Preparation of component B:

[0169] The curing agent and the diluent are mixed to obtain component B;

[0170] Components A and B are mixed to obtain a resin-based polymer film material layer;

[0171] (4) Preparation of miscible water-based paint material layer:

[0172] The miscible water-based paint material layer uses the following raw material components:

[0173] Water-based paint binder resin 40 kg, pigment 15 kg, filler 15 kg, additive 10 kg, and water containing 9% mass concentration of water-soluble silane 15 kg.

[0174] The water-based paint binder resin is a water-based epoxy resin, model EPIKOTE WD-510A;

[0175] The filler is a mixture of cement and calcium carbide slag, and the mass ratio of cement to calcium carbide slag is 17:1;

[0176] The additive is water-based dispersant 5040, water-based wetting agent PE-100, water-based defoamer BYK-017, and water-based epoxy curing agent EPIKURE 6870-W-53, and the mass ratio is 0.2:0.2:0.2:3.

[0177] The miscible water-based paint material layer uses the following raw material components:

[0178] The water-based paint binder resin, pigment, filler, additive, and water containing 9% mass concentration of water-soluble silane are mixed to obtain a miscible water-based paint material layer.

[0179] Example 2:

[0180] A preparation method of a composite protective material for repairing the surface of a cement concrete component, the preparation method comprising the following steps:

[0181] (1) Preparation of a water-soluble organosilane spraying material layer:

[0182] The water-soluble organosilane spraying material layer comprises the following raw material components:

[0183] 15 kg of organosilicon, 6 kg of nano-silicon dioxide, 30 kg of isooctyl triethoxysilane, 40 kg of cage-type silsesquioxane, 15 kg of silane adsorbent, and 15 kg of silane coupling agent KH-570.

[0184] The silane adsorbent is prepared according to Preparation Example 5.

[0185] The water-soluble organosilane spraying material layer is prepared according to the following steps:

[0186] After mixing the isooctyl triethoxysilane, the cage-type silsesquioxane, and the silane adsorbent, the organosilicon and the nano-silicon dioxide are mixed, and then the silane coupling agent KH-570 and 70 kg of water are mixed to obtain the water-soluble organosilane spraying material layer.

[0187] (2) Preparation of raw materials for an early-strength and fast-drying cement-based repair material layer:

[0188] The early-strength and fast-drying cement-based repair material layer comprises the following raw material components:

[0189] 55 kg of early-strength and fast-drying cement-based repair mortar and 15 parts of water containing 9% water-soluble silane by mass concentration.

[0190] The early-strength and fast-drying cement-based repair material layer is prepared according to the following steps:

[0191] The early-strength and fast-drying cement-based repair mortar and the water containing 9% water-soluble silane by mass concentration are mixed to obtain the raw materials for the early-strength and fast-drying cement-based repair material layer.

[0192] (3) Preparation of a resin-based high-molecular film coating material layer:

[0193] The resin-based high-molecular film coating material layer uses a two-component water-based epoxy resin, which comprises component A and component B; the mass ratio (epoxy equivalent to active hydrogen equivalent ratio) of the component A to the component B is 0.8:1.

[0194] The component A comprises the following raw material components by mass fraction: 45 kg of bisphenol A type epoxy resin, 0.5 kg of tetrabutylammonium bromide, 10 kg of lactic acid, and 44.5 kg of water.

[0195] The B component is a mixture of 1 kg of curing agent and 0.02 kg of diluent, wherein the diluent is ethylene glycol diglycidyl ether; the curing agent is polyetheramine D230.

[0196] The resin-based polymer film material layer is prepared by mixing the following materials:

[0197] Preparation of component A:

[0198] Mix bisphenol A type epoxy resin, tetrabutylammonium bromide, lactic acid and water to obtain component A;

[0199] Preparation of component B:

[0200] Mix the curing agent and the diluent to obtain component B;

[0201] Mix component A and component B to obtain the resin-based polymer film material layer;

[0202] (4) Preparation of the miscible water-based paint material layer:

[0203] The miscible water-based paint material layer uses the following raw material components:

[0204] Water-based paint binder resin 40 kg, pigment 15 kg, filler 15 kg, additive 10 kg, and water containing 9% mass concentration of water-soluble silane 20 kg.

[0205] The water-based paint binder resin is water-based epoxy resin, model EPIKOTE WD-510A;

[0206] The filler is a mixture of cement and carbide slag, and the mass ratio of cement to carbide slag is 17:1;

[0207] The additive is water-based dispersant 5040, water-based wetting agent PE-100, water-based defoamer BYK-017, and water-based epoxy curing agent EPIKURE 6870-W-53, with a mass ratio of 0.2:0.2:0.2:3.

[0208] The miscible water-based paint material layer is prepared by mixing the following materials:

[0209] Mix the water-based paint binder resin, pigment, filler, additive, and water containing 9% mass concentration of water-soluble silane to obtain the miscible water-based paint material layer.

[0210] Example 3:

[0211] A preparation method of a composite protective material for repairing the surface of a cement concrete member, the preparation method comprising the following steps:

[0212] (1) Preparation of the water-soluble organic silane spray material layer:

[0213] The water-soluble organosilane spray material layer, the preparation method steps of the used material are as follows:

[0214] The organosilicon 15 kg, the nanometer silicon dioxide 6 kg, the isooctyl triethoxysilane 40 kg, the cage type silsesquioxane 30 kg, the silane adsorbent 15 kg and the silane coupling agent KH-570 15 kg.

[0215] The silane adsorbent is prepared by the preparation example 6.

[0216] The water-soluble organosilane spray material layer, the preparation method steps of the used material are as follows:

[0217] The isooctyl triethoxysilane, the cage type silsesquioxane and the silane adsorbent are mixed, then the organosilicon and the nanometer silicon dioxide are mixed, then the silane coupling agent KH-570 and the water 70 kg are mixed, so as to obtain the water-soluble organosilane spray material layer;

[0218] (2) The preparation of the raw material of the early strength and fast drying type cement-based repair material layer:

[0219] The early strength and fast drying type cement-based repair material layer, the preparation method steps of the used material are as follows:

[0220] The early strength and fast drying type cement-based repair mortar 55 kg and the water containing the water-soluble silane with the mass concentration of 9% 15 parts;

[0221] The early strength and fast drying type cement-based repair material layer, the preparation method steps of the used material are as follows:

[0222] The early strength and fast drying type cement-based repair mortar and the water containing the water-soluble silane with the mass concentration of 9% are mixed, so as to obtain the raw material of the early strength and fast drying type cement-based repair material layer;

[0223] (3) The preparation of the resin type high molecular coating material layer:

[0224] The resin type high molecular coating material layer, the used material is a two-component water-based epoxy resin, the two-component water-based epoxy resin comprises component A and component B; the mass ratio (the epoxy equivalent and the active hydrogen equivalent ratio) of the component A and the component B is 0.8:1;

[0225] The component A comprises the following raw material components in mass fraction: the bisphenol A type epoxy resin 40 kg, the tetrabutylammonium bromide 0.8 kg, the lactic acid 12 kg and the water 47.2 kg;

[0226] The B component is the mixture of the curing agent 1 kg and the diluent 0.02 kg, wherein the diluent is ethylene glycol diglycidyl ether; the curing agent is polyetheramine D230.

[0227] The resin polymer film material layer is prepared by mixing the following materials:

[0228] Preparation of component A:

[0229] Mix bisphenol A epoxy resin, tetrabutylammonium bromide, lactic acid and water to obtain component A;

[0230] Preparation of component B:

[0231] Mix the curing agent and the diluent to obtain component B;

[0232] Mix component A and component B to obtain the resin polymer film material layer;

[0233] (4) Preparation of the miscible water-based paint material layer:

[0234] The miscible water-based paint material layer uses the following raw material components:

[0235] Water-based paint binder resin 45 kg, pigment 18 kg, filler 17 kg, additive 10 kg, and water containing 9% mass concentration of water-soluble silane 20 kg.

[0236] The water-based paint binder resin is water-based epoxy resin, model EPIKOTE WD-510A;

[0237] The filler is a mixture of cement and calcium carbide slag, and the mass ratio of cement to calcium carbide slag is 17:1;

[0238] The additive is water-based dispersant 5040, water-based wetting agent PE-100, water-based defoamer BYK-017, and water-based epoxy curing agent EPIKURE 6870-W-53, with a mass ratio of 0.2:0.2:0.2:3.

[0239] The miscible water-based paint material layer is prepared by mixing the following materials:

[0240] Mix the water-based paint binder resin, pigment, filler, additive, and water containing 9% mass concentration of water-soluble silane to obtain the miscible water-based paint material layer.

[0241] Example 4:

[0242] A preparation method of a composite protective material for repairing the surface of a cement concrete member, the preparation method comprising the following steps:

[0243] (1) Preparation of the water-soluble organic silane spray material layer:

[0244] The water-soluble organic silane spray material layer uses the following raw material components:

[0245] Organic silicon 10 kg, nano-silica 4 kg, isooctyl triethoxysilane 20 kg, cage silsesquioxane 20 kg, silane adsorbent 10 kg and silane coupling agent KH-570 10 kg.

[0246] The silane adsorbent is prepared by Preparation Example 7.

[0247] The preparation method steps of the water-soluble organosilane spraying material layer are as follows:

[0248] After mixing isooctyl triethoxysilane, cage silsesquioxane and silane adsorbent, organic silicon and nano-silica are added and mixed, and then silane coupling agent KH-570 and water 70 kg are added and mixed to obtain a water-soluble organosilane spraying material layer.

[0249] (2) Preparation of raw materials for early strength and fast drying type cement-based repair material layer:

[0250] The early strength and fast drying type cement-based repair material layer uses the following raw material components:

[0251] Early strength and fast drying type cement-based repair mortar 30 kg, water containing 8% mass concentration of water-soluble silane 10 kg;

[0252] The preparation method steps of the early strength and fast drying type cement-based repair material layer are as follows:

[0253] Early strength and fast drying type cement-based repair mortar and water containing 8% mass concentration of water-soluble silane are mixed to obtain raw materials for the early strength and fast drying type cement-based repair material layer.

[0254] (3) Preparation of resin-based high molecular film coating material layer:

[0255] The resin-based high molecular film coating material layer uses a two-component water-based epoxy resin, which includes component A and component B; the mass ratio of component A to component B is (epoxy equivalent to active hydrogen equivalent ratio) 0.8:1.

[0256] The component A includes the following raw material components in mass fraction: bisphenol A type epoxy resin 40 kg, tetrabutylammonium bromide 0.5 kg, lactic acid 8 kg and water 30 kg.

[0257] The B component is a mixture of curing agent 1 kg and diluent 0.01 kg; wherein the diluent is ethylene glycol diglycidyl ether; and the curing agent is polyetheramine D230.

[0258] The preparation method steps of the resin-based high molecular film coating material layer are as follows:

[0259] Preparation of component A:

[0260] Mixing bisphenol A type epoxy resin, tetrabutylammonium bromide, lactic acid and water to obtain component A;

[0261] Preparation of component B:

[0262] Mixing curing agent and diluent to obtain component B;

[0263] Mixing component A and component B to obtain resin-based polymer film material layer;

[0264] (4) Preparation of miscible water-based paint material layer:

[0265] The miscible water-based paint material layer uses materials including the following raw material components:

[0266] Water-based paint binder resin 30 kg, pigment 10 kg, filler 10 kg, additive 5 kg and water containing 8% mass concentration of water-soluble silane 10 kg.

[0267] Among them, the water-based paint binder resin is water-based epoxy resin, the model is EPIKOTE WD-510A;

[0268] The filler is a mixture of cement and carbide slag, and the mass ratio of cement to carbide slag is 17:1;

[0269] The additive is water-based dispersant 5040, water-based wetting agent PE-100, water-based defoamer BYK-017 and water-based epoxy curing agent EPIKURE 6870-W-53, and the mass ratio is 0.2:0.2:0.2:3.

[0270] The preparation method steps of the miscible water-based paint material layer are as follows:

[0271] Mixing water-based paint binder resin, pigment, filler, additive and water containing 8% mass concentration of water-soluble silane to obtain miscible water-based paint material layer.

[0272] Example 5:

[0273] A preparation method of a composite protective material for repairing the surface of a cement concrete member, the preparation method steps are as follows:

[0274] (1) Preparation of water-soluble organic silane spraying material layer:

[0275] The water-soluble organic silane spraying material layer uses materials including the following raw material components:

[0276] Organic silicon 20 kg, nano silicon dioxide 8 kg, isooctyl triethoxysilane 40 kg, cage-type silsesquioxane 40 kg, silane adsorbent 15 kg and silane coupling agent KH-570 15 kg.

[0277] The silane adsorbent is prepared from Preparation Example 8.

[0278] The preparation method steps of the water-soluble organosilane spraying material layer are as follows:

[0279] The isooctyl triethoxysilane, the cage polysiloxane, and the silane adsorbent are mixed, then the organosilicon and the nanosilica are mixed, then the silane coupling agent KH-570 and 70 kg of water are mixed to obtain the water-soluble organosilane spraying material layer.

[0280] (2) Preparation of raw materials of the early strength and fast drying type cement-based repair material layer:

[0281] The early strength and fast drying type cement-based repair material layer uses the following raw material components:

[0282] 75 kg of the early strength and fast drying type cement-based repair mortar and 25 kg of water containing 10% of the water-soluble silane by mass concentration.

[0283] The preparation method steps of the early strength and fast drying type cement-based repair material layer are as follows:

[0284] The early strength and fast drying type cement-based repair mortar and the water containing 10% of the water-soluble silane by mass concentration are mixed to obtain the raw materials of the early strength and fast drying type cement-based repair material layer.

[0285] (3) Preparation of the resin-based high molecular film coating material layer:

[0286] The resin-based high molecular film coating material layer uses a two-component water-based epoxy resin as the material, and the two-component water-based epoxy resin includes component A and component B; the mass ratio of the component A to the component B is 1.2:1 (the ratio of the epoxy equivalent weight to the active hydrogen equivalent weight).

[0287] The component A includes the following raw material components by mass fraction: 50 kg of bisphenol A type epoxy resin, 1 kg of tetrabutylammonium bromide, 12 kg of lactic acid, and 50 kg of water.

[0288] The B component is a mixture of 1 kg of a curing agent and 0.03 kg of a diluent; the diluent is ethylene glycol diglycidyl ether; and the curing agent is polyetheramine D230.

[0289] The preparation method steps of the resin-based high molecular film coating material layer are as follows:

[0290] Preparation of the component A:

[0291] The bisphenol A type epoxy resin, the tetrabutylammonium bromide, the lactic acid, and the water are mixed to obtain the component A.

[0292] Preparation of the component B:

[0293] Mixing the curing agent with the diluent to obtain component B;

[0294] Mixing component A, component B to obtain a resin-based polymer film material layer;

[0295] (4) Preparation of miscible water-based paint material layer:

[0296] The miscible water-based paint material layer uses materials including the following raw material components:

[0297] Water-based paint binder resin 50 kg, pigment 20 kg, filler 20 kg, additive 15 kg, and water containing 10% mass concentration of water-soluble silane 25 kg.

[0298] Among them, the water-based paint binder resin is water-based epoxy resin, model EPIKOTE WD-510A;

[0299] The filler is a mixture of cement and calcium carbide slag, and the mass ratio of cement to calcium carbide slag is 17:1;

[0300] The additive is water-based dispersant 5040, water-based wetting agent PE-100, water-based defoamer BYK-017, and water-based epoxy curing agent EPIKURE 6870-W-53, and the mass ratio is 0.2:0.2:0.2:3.

[0301] The preparation method steps of the miscible water-based paint material layer are as follows:

[0302] Mixing the water-based paint binder resin, pigment, filler, additive, and water containing 10% mass concentration of water-soluble silane to obtain a miscible water-based paint material layer.

[0303] Example 6:

[0304] The difference from Example 1 is that in the preparation of the silane adsorbent, the addition amount of the silicon dioxide / titanium nitride composite material is 8 kg.

[0305] Example 7:

[0306] The difference from Example 1 is that in the preparation of the silane adsorbent, the addition amount of the silicon dioxide / titanium nitride composite material is 16 kg.

[0307] Comparative Example 1:

[0308] The difference from Example 1 is that in the preparation of the silicon dioxide / titanium nitride composite material, no silicon-containing aluminum porous material is added.

[0309] Comparative Example 2:

[0310] The difference from Example 1 is that the silica / titanium nitride composite material is not added in preparing the silane adsorbent.

[0311] Comparative Example 3:

[0312] The difference from Example 1 is that the amount of the silica / titanium nitride composite material added in preparing the silane adsorbent is 7 kg.

[0313] Comparative Example 4:

[0314] The difference from Example 1 is that the amount of the silica / titanium nitride composite material added in preparing the silane adsorbent is 17 kg.

[0315] Application Example:

[0316] The construction method of the composite protective material for repairing the surface of cement concrete components is as follows:

[0317] The composite protective material for repairing the surface of cement concrete components prepared in the above examples and comparative examples is constructed as follows: (1) the concrete surface is cleaned;

[0318] (2) water is added to the raw material of the water-soluble organosilane spray material layer to dilute it into a mixture with a mass concentration of 18%, the mixture is sprayed onto the concrete surface, and the water-soluble organosilane spray material layer is formed on the concrete surface after standing for 1-2 hours;

[0319] (3) the concrete surface is repaired using the raw material of the early-strength and fast-drying cement-based repair material layer to obtain the early-strength and fast-drying cement-based repair material layer;

[0320] (4) the raw material of the resin-based polymer coating material layer is brushed on the surface of the early-strength and fast-drying cement-based repair material layer, and the resin-based polymer coating material layer is formed on the surface after standing for 1-2 hours;

[0321] (5) the raw material of the miscible water-based paint material layer is sprayed on the surface of the resin-based polymer coating material layer, and the miscible water-based paint material layer is formed on the surface after standing for 1-2 hours.

[0322] Performance detection:

[0323] 1. The performance of the composite protective material for repairing the surface of cement concrete components obtained in Examples 1-7 is detected, and the results are as follows:

[0324]

[0325]

[0326] The cement concrete component surface repairing composite protective material prepared by the examples 1-7 has good adhesion, weather resistance, convenient construction, and beautiful appearance, and low maintenance cost.

[0327] The resin polymer film material layer is added in the application, so that the cement concrete component surface repairing composite protective material has good adhesion and flexibility, can adapt to the slight deformation of the concrete surface, and ensure the durability of the protective effect.

[0328] The miscible water-based paint material layer is added in the application, so that the cement concrete component surface repairing composite protective material has excellent weather resistance and decoration, can provide a beautiful appearance for the concrete surface, and protect the concrete from the erosion of natural environment such as ultraviolet rays and acid rain.

[0329] 2. The cement concrete component surface repairing composite protective material samples prepared by the examples, the comparative examples, and the comparative examples are used for repairing and protecting the construction of the cement concrete crash barrier wall of the Liwu River Bridge of the Dechang-Shangyou Expressway, and the performance of the concrete is detected;

[0330] Evaluation method:

[0331] The detection standard of the compressive strength and the impermeable depth is GB / T50081-2016 "Standard for Testing Methods of Mechanical Properties of Ordinary Concrete" and GB / T50082-2009 "Standard for Testing Methods of Long-term Performance and Durability of Ordinary Concrete";

[0332] The detection standard of the water resistance is GB / T50082-2024 "Standard for Testing Methods of Long-term Performance and Durability of Concrete";

[0333] The detection standard of the chloride ion penetration resistance is GB / T50082-2009 "Standard for Testing Methods of Long-term Performance and Durability of Ordinary Concrete", and the electric flux method is used to detect the chloride ion penetration resistance.

[0334]

[0335]

[0336] As shown in Table 1, the cement concrete component surface repairing composite protective material prepared by the method of the application can protect the concrete from inside to outside, effectively improve the compressive strength, water resistance, impermeability, and chloride ion penetration resistance of the concrete.

[0337] According to the test results of Example 1 and Comparative Example 1, the compressive strength, water resistance, impermeability depth and resistance to chloride ion penetration of Example 1 are superior to those of Comparative Example 1, indicating that the addition of the porous material containing silicon and aluminum effectively improves the protective performance of the surface repair composite protective material for concrete.

[0338] According to the test results of Example 1 and Comparative Example 2, the compressive strength, water resistance, impermeability depth and resistance to chloride ion penetration of Example 1 are superior to those of Comparative Example 2, indicating that the addition of the silicon dioxide / titanium nitride composite material effectively improves the protective performance of the surface repair composite protective material for concrete.

[0339] According to the test results of Example 1, Example 6, Example 7, Comparative Example 3 and Comparative Example 4, the addition amount of the silicon dioxide / titanium nitride composite material has an influence on the compressive strength, water resistance, impermeability depth and resistance to chloride ion penetration of concrete, and the effect is best when the addition amount of the silicon dioxide / titanium nitride composite material is 8-16 kg.

[0340] The layers of the surface repair composite protective material for concrete are prepared by the method of the present application, and construction is performed according to the construction method; the multi-layer concrete protective material has excellent protective performance, can effectively improve the durability, water resistance and compressive strength of concrete, has adhesion, weather resistance, convenient construction, and an aesthetic appearance, and has low maintenance costs.

[0341] The surface repair composite protective material for concrete prepared by the method of the present application can be applied to concrete bridge crash walls, bridge piers and other components.

Claims

1. A composite protective material for repairing the surface of cement concrete components, characterized in that: It includes a water-soluble organosilane spraying material layer, a cement-based repair material layer, a resin-based polymer coating material layer, and a miscible water-based paint material layer; the cement-based repair material layer is disposed between the water-soluble organosilane spraying material layer and the resin-based polymer coating material layer, and the miscible water-based paint material layer is disposed on the outside of the resin-based polymer coating material layer. The water-soluble organosilane spray coating material layer comprises the following raw material components in parts by weight: 10-20 parts organosilicon, 4-8 parts nano-silica, 20-40 parts isooctyltriethoxysilane, 20-40 parts cage-type silsesquioxane, 10-15 parts silane adsorbent, and 10-15 parts silane coupling agent. The cement-based repair material layer comprises the following raw material components in parts by weight: 30-75 parts cement-based repair mortar and 10-25 parts water containing 8-10% water-soluble silane by weight. The silane adsorbent comprises the following raw material components in parts by weight: 13-18 parts kaolin, 5-10 parts bentonite, 20-25 parts diatomite, 15-20 parts polyboronsiloxane, 8-14 parts magnesium chloride, and 8-16 parts silica / titanium nitride composite material. The silica / titanium nitride composite material comprises the following raw material components in parts by weight: 1-5 parts titanium nitride nanospheres, 1-5 parts silica nanospheres, 2-4 parts first silane coupling agent, 1-3 parts second silane coupling agent, 1-5 parts octadecyl methacrylate, 0.02-0.1 parts 2,2'-azobisisobutyronitrile, 0.5-1.5 parts binder, and 1-5 parts by weight of silica-alumina porous material; The silicon-aluminum porous material comprises the following raw material components in parts by weight: 5-15 parts diatomaceous earth filter aid, 10-20 parts aluminum hydroxide, 1-5 parts sodium hydroxide, and 10-50 parts water.

2. The composite protective material for surface repair of cement concrete components according to claim 1, characterized in that: The raw material for the resin-based polymer coating material layer is a two-component waterborne epoxy resin, which includes component A and component B; the mass ratio of component A to component B is (0.8-1.2):

1. Component A comprises the following raw material components in parts by weight: 40-50 parts of bisphenol A type epoxy resin, 0.5-1 part of tetrabutylammonium bromide, 8-12 parts of lactic acid, and 30-50 parts of water. Component B is a mixture of curing agent and diluent, and the mass ratio of curing agent to diluent is 1:(0.01-0.03).

3. The composite protective material for surface repair of cement concrete components according to claim 1, characterized in that: The miscible water-based paint material layer comprises the following raw material components in parts by weight: 30-50 parts of water-based paint base resin, 10-20 parts of pigment, 10-20 parts of filler, 5-15 parts of additives, and 10-25 parts of water containing 8-10% water-soluble silane by weight.

4. The composite protective material for repairing the surface of cement concrete components according to claim 1, characterized in that: The preparation method of the silicon dioxide / titanium nitride composite material includes the following steps: Titanium nitride nanospheres, silica nanospheres and a first silane coupling agent were mixed, and then octadecyl methacrylate and 2,2'-azobisisobutyronitrile were added and mixed to obtain modified particles. The modified particles were mixed with a silicon-aluminum porous material and a second silane coupling agent, and then mixed with a binder to obtain a silicon dioxide / titanium nitride composite material.

5. A method for preparing a composite protective material for surface repair of cement concrete components according to any one of claims 1-4, characterized in that: The preparation method steps are as follows: (1) Preparation of raw materials for water-soluble organosilane spray coating material layer: Weigh out each ingredient according to the formula; After mixing isooctyltriethoxysilane, cage-type silsesquioxane, and silane adsorbent, organosilicon and nano-silica are added and mixed, followed by the addition of silane coupling agent to obtain the raw material for water-soluble organosilicon spray coating material layer. (2) Preparation of raw materials for cement-based repair material layer: Weigh out each ingredient according to the formula; The raw material for cement-based repair material layer is obtained by mixing cement-based repair mortar with water containing 8-10% water-soluble silane by mass concentration. (3) Preparation of raw materials for resin-based polymer coating materials: Weigh out each ingredient according to the formula; Preparation of component A: Bisphenol A type epoxy resin, tetrabutylammonium bromide, lactic acid and water are mixed to obtain component A; Preparation of component B: The curing agent and diluent are mixed to obtain component B; Component A and component B are mixed to obtain the raw material for the resin-based polymer coating material layer; (4) Preparation of raw materials for miscible water-based paint layers: Weigh out each ingredient according to the formula; The water-based paint base resin, pigments, fillers, additives, and water containing 8-10% water-soluble silane by mass are mixed to obtain the raw material for the miscible water-based paint material layer.

6. A construction method for a composite protective material for repairing the surface of cement concrete components prepared by the method described in claim 5, characterized in that: The construction method steps are as follows: (1) Clean the concrete surface; (2) Add water to the raw material of water-soluble organosilane spraying material layer, dilute it into a mixture with a mass concentration of 15-20%, spray the mixture onto the concrete surface, let it stand for 1-2 hours, and a water-soluble organosilane spraying material layer will be formed on the concrete surface. (3) The concrete surface is repaired using cement-based repair material material to obtain a cement-based repair material layer; (4) Apply resin-based polymer film coating material to the surface of the cement-based repair material layer and let it stand for 1-2 hours to form a resin-based polymer film coating material layer on the surface; (5) Spray the raw material of the mixed water-based paint layer onto the surface of the resin-based polymer coating material layer, let it stand for 1-2 hours, and a mixed water-based paint material layer will be formed on the surface.

Images