Underwater building structure repairing material as well as preparation method and application thereof

Abstract

The invention discloses an underwater building structure repairing material and a preparation method and application thereof, and relates to the technical field of underwater building materials, and the underwater building structure repairing material is prepared from the following raw materials in parts by weight: 20-30 parts of cement, 4-6 parts of rosin-based hyperbranched epoxy resin, 2-4 parts of (3, 6-diamino acridine-9-yl) boric acid, 3-5 parts of reinforced fibers, 1-3 parts of melamine, 1-3 parts of 3, 4-diphenyl-1, 3, 5-triazine, 1-3 parts of a curing agent, 1-3 parts of a curing agent, and 1-3 parts of a curing agent. The concrete is prepared from the following components in parts by weight: 0.5 to 0.8 part of 2, 7-diamino-5-phenylphenazine chloride, 0.8 to 1 part of N-(trimethoxysilylpropyl) ethylenediamine triacetic acid sodium salt, 5 to 8 parts of volcanic ash, 45 to 55 parts of aggregate, 0.1 to 0.3 part of anti-dispersing agent, 0.3 to 0.8 part of diisocyanate polyethylene glycol, 0.1 to 0.3 part of water reducing agent, 3 to 5 parts of bauxite, 0.1 to 0.2 part of catalyst and 8 to 13 parts of water. The material is high in compressive strength, good in adhesive property, excellent in durability, long in service life and suitable for construction in an underwater environment.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater building materials, and in particular to an underwater building structure repair material, a preparation method and application thereof. Background Art

[0002] my country is a country with a large number of hydropower projects, with tens of thousands of hydraulic concrete buildings built and in operation. Among them, there are a large number of underwater concrete structures of water-discharging buildings that are eroded and damage the engineering safety; bridges and dock buildings have underwater structures that are corroded by seawater, damaged by freeze-thaw damage, and mechanical damage; industrial buildings and cross-river and sea pipelines have underwater damage problems, which require timely reinforcement by planting steel bars. However, the widely used building structure repair materials for planting steel bars on the market are complicated to make and easy to cause pollution. The effect of planting steel bars is short-lived, and the leakage points need to be re-filled regularly. In addition, construction operations cannot be carried out directly in underwater environments, and rapid filling and plugging cannot be achieved in critical situations.

[0003] In order to solve the above problems, the Chinese invention patent with the authorization announcement number CN114276077B discloses an underwater building structure repair material and its preparation method and application, including the following weight parts: 17-28 parts of cement; 4-11 parts of water-resistant dispersing compounding agent; 3-5 parts of water-based epoxy emulsion; 0.8-4 parts of long fiber for anchoring; the long fiber for anchoring includes one or more of ultra-high strength polyethylene fiber, polyvinyl alcohol fiber, basalt fiber, and polyoxymethylene fiber, and the length of the single fiber is 4-20mm. The invention aims to provide an underwater building structure repair material, which can realize underwater injection molding construction and can replace steel bars for underwater anchoring operations, so that the bonding strength, flexural strength, tensile strength, ultimate tensile strain of the reinforcement material, and the failure load and acid medium corrosion resistance of the structure meet the design reinforcement related performance index requirements. However, its mechanical properties and durability still need to be further improved.

[0004] Therefore, the development of an underwater building structure repair material with high compressive strength, good bonding performance, good durability, long service life, and suitable for construction operations in underwater environments, as well as its preparation method and application, meets market demand, has broad market value and application prospects, and is of great significance to promoting the development of the underwater building repair field. Summary of the invention

[0005] The main purpose of the present invention is to provide an underwater building structure repair material with high compressive strength, good bonding performance, good durability, long service life, suitable for construction operations in underwater environments, and a preparation method and application thereof.

[0006] To achieve the above purpose, the present invention provides an underwater building structure repair material, which comprises the following raw materials in parts by weight: 20-30 parts of cement, 4-6 parts of rosin-based hyperbranched epoxy resin, 2-4 parts of (3,6-diaminoacridine-9-yl) boric acid, 3-5 parts of reinforcing fiber, 1-3 parts of melamine, 0.5-0.8 parts of 3,7-diamino-5-phenylphenazine chloride, 0.8-1 parts of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt, 5-8 parts of volcanic ash, 45-55 parts of aggregate, 0.1-0.3 parts of anti-dispersant, 0.3-0.8 parts of diisocyanate polyethylene glycol, 0.1-0.3 parts of water reducer, 3-5 parts of bauxite, 0.1-0.2 parts of catalyst and 8-13 parts of water.

[0007] Preferably, the cement is at least one of PI type 52.5 silicate cement, sulphoaluminate cement and aluminate cement.

[0008] Preferably, there is no special requirement for the source of the rosin-based hyperbranched epoxy resin. In one embodiment of the present invention, the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of the Chinese invention patent with authorization announcement number CN106519188B.

[0009] Preferably, the reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:(1-2):(0.8-1.2).

[0010] Preferably, the average diameter of the reinforcing fibers is 3-9 μm and the length is 3-6 mm; and the glass fibers are alkali-free glass fibers.

[0011] Preferably, the particle size of the volcanic ash is 800-1200 mesh.

[0012] Preferably, the aggregate is sand; the sand is natural river sand with a fineness modulus of 2.3 to 3.0.

[0013] Preferably, the anti-dispersion agent is at least one of hydroxypropyl methylcellulose and polyvinyl amidine.

[0014] Preferably, the number average molecular weight of the diisocyanate polyethylene glycol is 400, and it is provided by Guangdong Wengjiang Chemical Reagent Co., Ltd.

[0015] Preferably, the water reducer is at least one of sodium lignin sulfonate and BASF polycarboxylate water reducer RL211.

[0016] Preferably, the particle size of the bauxite is 800-1200 mesh.

[0017] Preferably, the catalyst is at least one of bis(dimethylaminoethyl) ether and pentamethyldiethylenetriamine.

[0018] Another object of the present invention is to provide a method for preparing the underwater building structure repair material, comprising the following steps: mixing the raw materials according to parts by weight, stirring evenly, and obtaining the underwater building structure repair material.

[0019] Another object of the present invention is to provide an application of the underwater building structure repair material in the field of underwater building structure repair, structural reinforcement or crack repair.

[0020] Due to the application of the above technical solution, the present invention has the following beneficial effects: (1) The preparation method and application of underwater building structure repair materials disclosed in the present invention have simple process, convenient operation and construction, high preparation efficiency and finished product qualification rate, low dependence on equipment, energy consumption and labor intensity, small impact on the environment, suitable for continuous large-scale production, and have high promotion and application value.

[0021] (2) The underwater building structure repair material disclosed in the present invention comprises the following raw materials in parts by weight: 20-30 parts of cement, 4-6 parts of rosin-based hyperbranched epoxy resin, 2-4 parts of (3,6-diaminoacridine-9-yl)boric acid, 3-5 parts of reinforcing fiber, 1-3 parts of melamine, 0.5-0.8 parts of 3,7-diamino-5-phenylphenazine chloride, 0.8-1 parts of sodium salt of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid, 5-8 parts of volcanic ash, 45-55 parts of aggregate, 0.1-0.3 parts of anti-dispersant, 0.3-0.8 parts of diisocyanate polyethylene glycol, 0.1-0.3 parts of water reducer, 3-5 parts of bauxite, 0.1-0.2 parts of catalyst, and 8-13 parts of water. Through the mutual cooperation and joint action of various raw materials, the product can be endowed with the advantages of high compressive strength, good bonding performance, good durability, long service life, and suitable for construction operations in underwater environments. The epoxy group on the rosin-based hyperbranched epoxy resin can undergo a curing reaction with the amino group on (3,6-diaminoacridine-9-yl)boric acid, melamine, and 3,7-diamino-5-phenylphenazine chloride; at the same time, the isocyanate group on the diisocyanate polyethylene glycol can react with the above-mentioned amino-containing raw materials and water; N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt can also undergo an ion exchange reaction with 3,7-diamino-5-phenylphenazine chloride; thus, the mechanical properties of the repair material can be effectively improved, so that it can be quickly cured in water; the interpenetrating network interlocking structure formed can further improve durability and mechanical properties, thereby extending its service life.

[0022] (3) The underwater building structure repair material disclosed in the present invention can improve the compatibility between the raw materials and thus improve the bonding strength by adding organic raw material components, so that the internal structure of the formed repair material is denser, thereby improving its comprehensive performance and extending its service life; the introduction of hyperbranched structure can improve its toughness; at the same time, the rosin-based hyperbranched epoxy resin structure, acridine, melamine, phenazine, siloxane and polyurea structure (introduced by reaction of isocyanate group and amino group) introduced, these structures and groups, under the multiple effects of electronic effect, steric effect and conjugation effect, make the mechanical properties of the prepared repair material better; better bonding performance, better durability and longer service life.

[0023] (4) The underwater building structure repair material disclosed in the present invention, the inorganic components such as aggregate, volcanic ash, reinforcing fiber and bauxite, work together with cement to effectively improve the mechanical properties, workability and durability of the repair material. At the same time, the amount of cement can be greatly reduced. In addition, they can also make the repair material form a relatively dense structure, and significantly improve the water seepage of the repair material, avoid the formation of interconnected capillaries, and thus improve the impermeability and durability of the repair material. DETAILED DESCRIPTION

[0024] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations. Example 1

[0025] A material for repairing underwater building structures comprises the following raw materials in parts by weight: 20 parts of cement, 4 parts of rosin-based hyperbranched epoxy resin, 2 parts of (3,6-diaminoacridine-9-yl)boric acid, 3 parts of reinforcing fiber, 1 part of melamine, 0.5 parts of 3,7-diamino-5-phenylphenazine chloride, 0.8 parts of sodium salt of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid, 5 parts of volcanic ash, 45 parts of aggregate, 0.1 parts of anti-dispersant, 0.3 parts of diisocyanate polyethylene glycol, 0.1 parts of water reducer, 3 parts of bauxite, 0.1 parts of catalyst and 8 parts of water.

[0026] The cement is PI type 52.5 silicate cement; the rosin-based hyperbranched epoxy resin is made according to the method of Example 1 of the Chinese invention patent with authorization announcement number CN106519188B; the reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:1:0.8; the average diameter of the reinforcing fiber is 3 μm and the length is 3 mm; the glass fiber is alkali-free glass fiber; the particle size of the volcanic ash is 800 mesh; the aggregate is sand; the sand is natural river sand with a fineness modulus of 2.3; the anti-dispersant is hydroxypropyl methylcellulose; the number average molecular weight of the diisocyanate polyethylene glycol is 400, which is provided by Guangdong Wengjiang Chemical Reagent Co., Ltd.; the water reducer is sodium lignin sulfonate; the particle size of the bauxite is 800 mesh; and the catalyst is bis(dimethylaminoethyl) ether.

[0027] A method for preparing the underwater building structure repair material comprises the following steps: mixing various raw materials according to weight parts, stirring evenly, and obtaining the underwater building structure repair material.

[0028] An application of the underwater building structure repair material in the field of underwater building structure repair, structure reinforcement or crack repair. Example 2

[0029] A structural repair material for underwater buildings comprises the following raw materials in parts by weight: 23 parts of cement, 4.5 parts of rosin-based hyperbranched epoxy resin, 2.5 parts of (3,6-diaminoacridine-9-yl) boric acid, 3.5 parts of reinforcing fiber, 1.5 parts of melamine, 0.6 parts of 3,7-diamino-5-phenylphenazine chloride, 0.85 parts of sodium salt of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid, 6 parts of volcanic ash, 47 parts of aggregate, 0.15 parts of anti-dispersant, 0.4 parts of diisocyanate polyethylene glycol, 0.15 parts of water reducer, 3.5 parts of bauxite, 0.13 parts of catalyst and 9 parts of water.

[0030] The cement is sulphoaluminate cement SAC42.5; the rosin-based hyperbranched epoxy resin is made according to the method of Example 1 of the Chinese invention patent with authorization announcement number CN106519188B; the reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:1.3:0.9; the average diameter of the reinforcing fiber is 5 μm and the length is 4 mm; the glass fiber is alkali-free glass fiber; the particle size of the volcanic ash is 900 mesh; the aggregate is sand; the sand is natural river sand with a fineness modulus of 2.5; the anti-dispersant is polyethylene amidine; the number average molecular weight of the diisocyanate polyethylene glycol is 400, which is provided by Guangdong Wengjiang Chemical Reagent Co., Ltd.; the water reducer is BASF polycarboxylate water reducer RL211; the particle size of the bauxite is 900 mesh; and the catalyst is pentamethyldiethylenetriamine.

[0031] A method for preparing the underwater building structure repair material comprises the following steps: mixing various raw materials according to weight parts, stirring evenly, and obtaining the underwater building structure repair material.

[0032] An application of the underwater building structure repair material in the field of underwater building structure repair, structure reinforcement or crack repair. Example 3

[0033] A structural repair material for underwater buildings comprises the following raw materials in parts by weight: 25 parts of cement, 5 parts of rosin-based hyperbranched epoxy resin, 3 parts of (3,6-diaminoacridine-9-yl) boric acid, 4 parts of reinforcing fiber, 2 parts of melamine, 0.65 parts of 3,7-diamino-5-phenylphenazine chloride, 0.9 parts of sodium salt of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid, 6.5 parts of volcanic ash, 50 parts of aggregate, 0.2 parts of anti-dispersant, 0.6 parts of diisocyanate polyethylene glycol, 0.2 parts of water reducer, 4 parts of bauxite, 0.15 parts of catalyst and 10 parts of water.

[0034] The cement is aluminate cement CA50; the rosin-based hyperbranched epoxy resin is made according to the method of Example 1 of the Chinese invention patent with authorization announcement number CN106519188B; the reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:1.5:1; the average diameter of the reinforcing fiber is 6 μm and the length is 4.5 mm; the glass fiber is alkali-free glass fiber; the particle size of the volcanic ash is 1000 mesh; the aggregate is sand; the sand is natural river sand , fineness modulus is 2.7; the anti-dispersant is hydroxypropyl methylcellulose and polyethylene amidine mixed in a mass ratio of 1:3; the number average molecular weight of the diisocyanate polyethylene glycol is 400, provided by Guangdong Wengjiang Chemical Reagent Co., Ltd.; the water reducer is sodium lignin sulfonate and BASF polycarboxylic acid water reducer RL211 mixed in a mass ratio of 3:5; the particle size of the bauxite is 1000 mesh; the catalyst is bis(dimethylaminoethyl) ether and pentamethyldiethylenetriamine mixed in a mass ratio of 3:5.

[0035] A method for preparing the underwater building structure repair material comprises the following steps: mixing various raw materials according to weight parts, stirring evenly, and obtaining the underwater building structure repair material.

[0036] An application of the underwater building structure repair material in the field of underwater building structure repair, structure reinforcement or crack repair. Example 4

[0037] A structural repair material for underwater buildings comprises the following raw materials in parts by weight: 28 parts of cement, 5.5 parts of rosin-based hyperbranched epoxy resin, 3.5 parts of (3,6-diaminoacridine-9-yl) boric acid, 4.5 parts of reinforcing fibers, 2.5 parts of melamine, 0.75 parts of 3,7-diamino-5-phenylphenazine chloride, 0.95 parts of sodium salt of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid, 7.5 parts of volcanic ash, 53 parts of aggregate, 0.25 parts of anti-dispersant, 0.7 parts of diisocyanate polyethylene glycol, 0.25 parts of water reducer, 4.5 parts of bauxite, 0.18 parts of catalyst and 11 parts of water.

[0038] The cement is a mixture of PI type 52.5 silicate cement, sulphoaluminate cement SAC42.5 and aluminate cement CA50 in a mass ratio of 2:1:1; the rosin-based hyperbranched epoxy resin is prepared according to the method of Example 1 of the Chinese invention patent with the authorization announcement number CN106519188B; the reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:1.8:1.1; the average diameter of the reinforcing fiber is 8 μm and the length is 5.5 m m; the glass fiber is alkali-free glass fiber; the particle size of the volcanic ash is 1100 mesh; the aggregate is sand; the sand is natural river sand with a fineness modulus of 2.9; the anti-dispersant is hydroxypropyl methylcellulose; the number average molecular weight of the diisocyanate polyethylene glycol is 400, provided by Guangdong Wengjiang Chemical Reagent Co., Ltd.; the water reducer is BASF polycarboxylate water reducer RL211; the particle size of the bauxite is 1100 mesh; and the catalyst is bis(dimethylaminoethyl) ether.

[0039] A method for preparing the underwater building structure repair material comprises the following steps: mixing various raw materials according to weight parts, stirring evenly, and obtaining the underwater building structure repair material.

[0040] An application of the underwater building structure repair material in the field of underwater building structure repair, structure reinforcement or crack repair. Example 5

[0041] A structural repair material for underwater buildings comprises the following raw materials in parts by weight: 30 parts of cement, 6 parts of rosin-based hyperbranched epoxy resin, 4 parts of (3,6-diaminoacridine-9-yl) boric acid, 5 parts of reinforcing fiber, 3 parts of melamine, 0.8 parts of 3,7-diamino-5-phenylphenazine chloride, 1 part of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt, 8 parts of volcanic ash, 55 parts of aggregate, 0.3 parts of anti-dispersant, 0.8 parts of diisocyanate polyethylene glycol, 0.3 parts of water reducer, 5 parts of bauxite, 0.2 parts of catalyst and 13 parts of water.

[0042] The cement is PI type 52.5 silicate cement; the rosin-based hyperbranched epoxy resin is made according to the method of Example 1 of the Chinese invention patent with authorization announcement number CN106519188B; the reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:2:1.2; the average diameter of the reinforcing fiber is 9 μm and the length is 6 mm; the glass fiber is alkali-free glass fiber; the particle size of the volcanic ash is 1200 mesh; the aggregate is sand; the sand is natural river sand with a fineness modulus of 3.0; the anti-dispersant is hydroxypropyl methylcellulose; the number average molecular weight of the diisocyanate polyethylene glycol is 400, which is provided by Guangdong Wengjiang Chemical Reagent Co., Ltd.; the water reducer is BASF polycarboxylate water reducer RL211; the particle size of the bauxite is 1200 mesh; and the catalyst is pentamethyldiethylenetriamine.

[0043] A method for preparing the underwater building structure repair material comprises the following steps: mixing various raw materials according to weight parts, stirring evenly, and obtaining the underwater building structure repair material.

[0044] An application of the underwater building structure repair material in the field of underwater building structure repair, structure reinforcement or crack repair.

[0045] Comparative Example 1 An underwater building structure repair material and a preparation method thereof, which are basically the same as Example 1, except that 3,7-diamino-5-phenylphenazine chloride and N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt are not added.

[0046] Comparative Example 2 An underwater building structure repair material and a preparation method thereof, which are substantially the same as those of Example 1, except that (3,6-diaminoacridine-9-yl)boric acid and diisocyanate polyethylene glycol are not added.

[0047] In order to further illustrate the beneficial technical effects of the underwater building structure repair materials involved in each embodiment of the present invention, relevant performance tests were conducted on the underwater building structure repair materials involved in Examples 1-5 and Comparative Examples 1-2. The test results are shown in Table 1. The test method is as follows: (1) Initial setting time and final setting time: Test according to GB / T1346-2011; (2) 28d compressive strength: tested in accordance with GB / T 17671-2021; (3) 28d bonding strength: tested in accordance with JGJ / T 70-2009; (4) 28d impermeability pressure: tested in accordance with JGJ / T 70-2009; (5) Durability: Referring to the standard GB / T50082-2009 Test method for long-term performance and durability of ordinary concrete, the rapid chloride ion migration coefficient method was used to test the chloride ion penetration resistance of cylindrical repair material specimens with a diameter of 100 mm and a height of 50 mm.

[0048] As can be seen from Table 1, the underwater building structure repair material disclosed in the embodiment of the present invention has higher mechanical properties, more excellent anti-permeability, bonding performance and durability, and faster solidification speed than the comparative example product; the combined use of 3,7-diamino-5-phenylphenazine chloride, N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid sodium salt, (3,6-diaminoacridine-9-yl)boric acid and diisocyanate polyethylene glycol is beneficial to improving the above properties.

[0049] Table 1

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A structural repair material for underwater buildings, characterized in that: The invention comprises the following raw materials in parts by weight: 20-30 parts of cement, 4-6 parts of rosin-based hyperbranched epoxy resin, 2-4 parts of (3,6-diaminoacridine-9-yl) boric acid, 3-5 parts of reinforcing fiber, 1-3 parts of melamine, 0.5-0.8 parts of 3,7-diamino-5-phenylphenazine chloride, 0.8-1 parts of sodium salt of N-(trimethoxysilylpropyl)ethylenediaminetriacetic acid, 5-8 parts of volcanic ash, 45-55 parts of aggregate, 0.1-0.3 parts of anti-dispersant, 0.3-0.8 parts of diisocyanate polyethylene glycol, 0.1-0.3 parts of water reducer, 3-5 parts of bauxite, 0.1-0.2 parts of catalyst and 8-13 parts of water.

2. The underwater building structure repair material according to claim 1, characterized in that: The cement is at least one of PI type 52.5 silicate cement, sulphoaluminate cement and aluminate cement.

3. The underwater building structure repair material according to claim 1, characterized in that: The reinforcing fiber is a mixture of boron fiber, glass fiber and mullite fiber in a mass ratio of 1:(1-2):(0.8-1.2).

4. The underwater building structure repair material according to claim 1, characterized in that: The average diameter of the reinforcing fiber is 3-9 μm, and the length is 3-6 mm; the glass fiber is alkali-free glass fiber.

5. The underwater building structure repair material according to claim 1, characterized in that: The particle size of the volcanic ash is 800-1200 meshes.

6. The underwater building structure repair material according to claim 1, characterized in that: The aggregate is sand; the sand is natural river sand with a fineness modulus of 2.3 to 3.

0.

7. The underwater building structure repair material according to claim 1, characterized in that: The anti-dispersant is at least one of hydroxypropyl methylcellulose and polyvinyl amidine; the number average molecular weight of the diisocyanate polyethylene glycol is 400.

8. The underwater building structure repair material according to claim 1, characterized in that: The water reducer is at least one of sodium lignin sulfonate and BASF polycarboxylate water reducer RL211; the particle size of the bauxite is 800-1200 meshes; and the catalyst is at least one of bis(dimethylaminoethyl) ether and pentamethyldiethylenetriamine.

9. A method for preparing the underwater building structure repair material according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: mixing various raw materials according to weight parts, stirring evenly, and obtaining the underwater building structure repair material.

10. Use of the underwater building structure repair material according to any one of claims 1 to 8 in the field of underwater building structure repair, structural reinforcement or crack repair.

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