CN113149561B - Structural repair reinforcing material for concrete chimney and cooling tower and application thereof - Google Patents
Structural repair reinforcing material for concrete chimney and cooling tower and application thereof Download PDFInfo
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- CN113149561B CN113149561B CN202110462934.7A CN202110462934A CN113149561B CN 113149561 B CN113149561 B CN 113149561B CN 202110462934 A CN202110462934 A CN 202110462934A CN 113149561 B CN113149561 B CN 113149561B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/72—Repairing or restoring existing buildings or building materials
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- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Epoxy Resins (AREA)
Abstract
The invention relates to the field of building materials, and discloses a structural repair reinforcing material for a concrete chimney and a cooling tower and application thereof. The base surface repair mortar can be permanently integrated with concrete, and the repaired and reinforced concrete surface has excellent capacities of resisting carbonization, permeability, acid rain, freezing and thawing and the like; after the concrete grouting liquid is applied in a grouting mode, loose concrete or concrete cracks and base surface repair mortar can be fully bonded together and permanently integrated, so that the risk of the repaired concrete loosening and cracking again is reduced.
Description
Technical Field
The invention relates to the field of building materials, in particular to a structural repair reinforcing material for a concrete chimney and a cooling tower and application thereof.
Background
The chimney is a structure for providing ventilation for hot smoke or smoke; the cooling tower is a facility for cooling circulating water by utilizing the air convection effect formed by the density difference of air inside and outside the tower or natural wind power. The base bodies of the chimney and the cooling tower are mainly formed by pouring concrete, and due to the particularity of the use environment, the concrete is very easy to corrode, so that the surfaces of the base body structures of the chimney and the cooling tower often have defects and need to be repaired and reinforced in time.
For example, the applicant's prior application CN201810377366.9 discloses a penetration cross-linking type composite coating for corrosion protection of cooling towers, which comprises a base patching material, quartz powder, portland cement and an acrylate/acrylamide/acrylate terpolymer. The base surface repairing material can effectively repair the defects on the surface of a concrete base body, and can achieve the effect of long-acting corrosion prevention after being matched with a bottom coating (portland cement slag, quartz sand and quartz powder), an inner wall surface coating and an outer wall surface coating.
However, the fusion between the base patching material and the original concrete matrix still has a small improvement space, and the effect of permanently integrating the base patching material with the concrete cannot be really realized, so that the repaired concrete still has a small risk of reducing the performance and the structural stability, and finally the concrete matrix is loosened and cracked again.
Disclosure of Invention
In order to solve the technical problems, the invention provides a structural repair reinforcing material for a concrete chimney and a cooling tower and application thereof. The base surface repair mortar can be permanently integrated with concrete, and the repaired and reinforced concrete surface has excellent capacities of resisting carbonization, permeability, acid rain, freezing and thawing and the like; after the concrete grouting liquid is applied in a grouting mode, loose concrete or concrete cracks and base surface repair mortar can be fully bonded together and permanently integrated, so that the risk of the repaired concrete loosening and cracking again is reduced.
The specific technical scheme of the invention is as follows: the invention provides a structural repair reinforcing material for a concrete chimney and a cooling tower, which comprises base surface repair mortar and concrete grouting liquid.
The base surface repair mortar comprises the following components in percentage by mass: 40-55% of natural quartz sand, 40-55% of Portland cement of the Portland cement, 1-2% of acrylate/acrylamide/acrylate terpolymer and D950.0-0.1% of < 10 μm hydraulic binder (methylcellulose), 0.0-5.0% of micron-sized diamine @ aluminium MOF particles, 0.0-0.1% polyethylene.
The concrete grouting liquid comprises a component A and a component B in a mass ratio of (4-4.5) to (1.5-2.0), wherein: the component A comprises the following components in percentage by mass: 60-68% of bisphenol-A-epichlorohydrin resin (preferably Mw is less than 700), 10-20% of glycidyl 12-14 alkyl ether, 10-20% of 1, 6-hexanediol diglycidyl ether, 10-20% of bisphenol F epoxy resin with Mw less than 700 and 2-5% of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane.
The component B comprises the following components in percentage by mass: 20-31% of isophorone diamine, 40-51% of polyether amine, 10-20% of m-xylylenediamine, 10-20% of bisphenol A, 5-10% of trimethyl hexamethylene dioxime, 2-5% of 2, 2' -methylene biphenol and 2-5% of 2,4, 6-tris (dimethylaminomethyl) phenol.
In the scheme of the invention, two materials, namely base surface repair mortar and concrete grouting liquid, can be selectively included, wherein the base surface repair mortar mainly plays a repairing role, and the concrete grouting liquid mainly plays a reinforcing role. Specifically, the method comprises the following steps:
(1) the base surface repair mortar can replace concrete and has excellent characteristics of chemical medium corrosion resistance and mechanical impact resistance. The mortar contains the following components in addition to the common natural quartz sand, Portland cement and acrylate/amine acrylate/acrylate terpolymer:
(1.1)D95hydraulic binder (< 10 microns) (methylcellulose): the hydraulic binder with low particle size and high specific surface area can obviously increase the contact area between mortar and the surface of concrete, thereby greatly improving the bonding property between the mortar and the concrete, and permanently integrating the mortar and the concrete through the infiltration reaction function of materials in the mortar. On the other hand, the low-particle size hydraulic binder can be ideally filled in the space between filler particles, so that the mortar has extremely high compactness and very high compressive strength, and extremely high impermeability. In addition, due to the smaller form, the mortar has other properties (such as sulfate resistance and the like).
(1.2) micron-sized diamine @ aluminum MOF particles: the MOF material is a novel composite material which takes an organic ligand as a framework and is loaded with metal and has a three-dimensional cage-like structure, and a porous network structure is arranged in the MOF material. After the material is added into mortar and fully mixed, a hydraulic binder (methyl cellulose) of a nano-scale part permeates into the MOF material, so that the MOF material and the mortar are hardened into a whole, and the MOF serving as a reinforcing material can effectively reduce the brittleness of the mortar after being cured. The MOF material has excellent humidity conditioning capability, and absorbs water under the difference of internal and external osmotic pressures when the concrete is in a relatively high-humidity state; when the concrete is in a low-humidity state, the MOF material can release water, and the humidity of the concrete can be effectively adjusted by the characteristics of the MOF material, so that the durability is improved. In addition, more importantly, the invention skillfully utilizes the porous adsorbability of the aluminum MOF to load diamine, when the base repair mortar is matched with the concrete grouting liquid, the diamine can be crosslinked and cured with the component A in the concrete grouting liquid, so that the crosslinking combination degree of the base repair mortar and the concrete grouting liquid can be obviously increased, the base repair mortar and the concrete grouting liquid are permanently integrated, and the risk of secondary loosening and cracking is reduced.
In conclusion, the main characteristics of the base surface repair mortar of the invention are as follows: 1) the concrete has similar physical and chemical performance indexes as concrete: 7d compressive strength of more than 35N/mm228d compressive strength of more than 50N/mm2(ii) a 2) Has low shrinkage characteristics: the self-shrinkage rate of the material is extremely low, and the material cannot crack due to self-shrinkage and cannot be peeled from concrete to form two skins; 3) extremely high bond strength: the bonding strength is more than 2.0 Mpa; 4) extremely strong impermeability: the anti-seepage pressure is more than 1.5 Mpa; 5) excellent stability: freeze-thaw resistance, damp-heat resistance, and dry-heat resistance; 6) excellent corrosion resistance: the material itself has a certain resistance to corrosion by chemical agents.
(2) The concrete grouting liquid is a bi-component product, is specially used for crack bonding grouting, and can be used for filling and bonding dry, slightly wet and even wet cracks, defect parts and cavities. On a porous concrete base, the concrete has good permeability. When the A, B components are contacted and reacted, the adhesive has good adhesion with concrete, stone, metal and other walls. The material can be filled into cracks and defects on the building structure for a long time and strongly by an injection mode. And the material does not contain filler and plasticizer, so the possibility that the components are decomposed after the product is used is eliminated. In addition, due to the low materialSecret (about 1 g/cm)3) Low viscosity (23 ℃, about 120mpa.s) (lower molecular weight component is selected, viscosity is lower), when injection is carried out, the material can quickly fill the non-compact area in the injection area and infiltrate into capillary channels (holes) in the surrounding concrete, so that the concrete is firmly bonded together again, the compression strength of the material per se is more than 70Mpa, and the splitting tensile strength is more than 15Mpa, so that the material and the concrete can be permanently integrated after grouting.
Preferably, the process for the preparation of the diamine @ MOF particles comprises: adding aluminum nitrate and 4,4' -biphenyldicarboxylic acid into water according to the molar ratio of aluminum element to carboxyl of 1: 0.8-1.2, uniformly dispersing, heating, adjusting the pH value of the obtained solution to be acidic, and carrying out heat preservation reaction; after the reaction is finished, filtering, washing, drying and crushing to obtain micron-sized aluminum MOF particles; and (3) soaking the aluminum MOF particles in a diamine solution, standing for adsorption, and performing centrifugal separation to obtain diamine @ MOF particles.
The method takes aluminum nitrate as a metal source and 4,4' -biphenyldicarboxylic acid as an organic ligand to prepare the aluminum MOF particles through hydrothermal reaction, and then takes the aluminum MOF particles as an adsorption carrier to load diamine. When the base surface repair mortar and the concrete grouting liquid are used in a matched mode, the diamine can be crosslinked and cured with the component A in the concrete grouting liquid, so that the crosslinking combination degree of the base surface repair mortar and the concrete grouting liquid can be remarkably increased, the base surface repair mortar and the concrete grouting liquid are enabled to be permanently integrated, and the risk of secondary loosening and cracking is reduced.
Preferably, the temperature is raised to 160-200 ℃, then the pH of the obtained solution is adjusted to 2-4, and the reaction is carried out for 5-10h under the condition of heat preservation.
Preferably, the standing adsorption time is 2-4 h.
Preferably, the diamine is isophoronediamine, m-phenylenediamine or m-xylylenediamine.
In another aspect, the invention provides the application of the structural repair reinforcing material in the reinforcement and repair of concrete chimneys and cooling towers.
Compared with the prior art, the invention has the beneficial effects that:
(1) the base surface repair mortar is used, the problem of concrete repair and reinforcement is solved, the mortar can be permanently integrated with concrete due to the extremely special characteristic, and the outer wall of the chimney after repair and reinforcement has excellent capabilities of resisting carbonization, permeability, acid rain, freezing and thawing and the like.
(2) And (4) by means of grouting, the loose concrete or the concrete cracks are refilled and bonded together. Due to the special characteristics of the material, the material and the concrete can be permanently integrated, and the problem that the performance and the structural stability of the concrete are reduced due to loosening and cracking is solved.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
A structural repairing and reinforcing material for concrete chimney and cooling tower is composed of base surface repairing mortar and concrete grout. Wherein: the base surface repair mortar comprises the following components in percentage by mass: 40-55% of natural quartz sand and specific surface area of over 12000cm240-55% of Portland cement per gram, 1-2% of acrylate/amine acrylate/acrylate terpolymer, D950.0-0.1% of < 10 μm hydraulic binder (methylcellulose), 0.0-5.0% of micron-sized diamine @ aluminium MOF particles, 0.0-0.1% polyethylene.
Preferably, the method for preparing micron-sized diamine @ MOF particles comprises: adding aluminum nitrate and 4,4' -biphenyl dicarboxylic acid into water according to the molar ratio of aluminum element to carboxyl of 1: 0.8-1.2, uniformly dispersing, heating to 160-; after the reaction is finished, filtering, washing, drying and crushing to obtain micron-sized aluminum MOF particles; and (2) dipping the aluminum MOF particles into a diamine solution (isophorone diamine, m-phenylenediamine or m-xylylenediamine), standing for adsorption for 2-4h, and performing centrifugal separation to obtain micron-sized diamine @ MOF particles.
The concrete grouting liquid comprises a component A and a component B in a mass ratio of (4-4.5) to (1.5-2.0), wherein: the component A comprises the following components in percentage by mass: 60-68% of bisphenol-A-epichlorohydrin resin with Mw less than 700, 10-20% of glycidyl 12-14 alkyl ether, 10-20% of 1, 6-hexanediol diglycidyl ether, 10-20% of bisphenol F epoxy resin with Mw less than 700 and 2-5% of 3- (2, 3-glycidoxy) propyl trimethoxy silane.
The component B comprises the following components in percentage by mass: 20-31% of isophorone diamine, 40-51% of polyether amine, 10-20% of m-xylylenediamine, 10-20% of bisphenol A, 5-10% of trimethyl hexamethylene dioxime, 2-5% of 2, 2' -methylene biphenol and 2-5% of 2,4, 6-tris (dimethylaminomethyl) phenol.
Example 1
A structural repairing and reinforcing material for concrete chimney and cooling tower is composed of base surface repairing mortar and concrete grout. Wherein: the base surface repair mortar comprises the following components in percentage by mass: 50% of natural quartz sand and specific surface area more than 12000cm248.4% of Portland cement/g, 1.5% of acrylate/amine acrylate/acrylate terpolymer, D950.05% of < 10 μm hydraulic binder (methylcellulose), 0.05% of polyethylene.
The concrete grouting liquid comprises a component A and a component B in a mass ratio of 4.23: 1.77, wherein:
the component A comprises the following components in percentage by mass: 62 percent of bisphenol-A-epichlorohydrin resin with Mw less than 700, 12 percent of glycidyl 12-14 alkyl ether, 12 percent of 1, 6-hexanediol diglycidyl ether, 10.5 percent of bisphenol F epoxy resin with Mw less than 700 and 3.5 percent of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane.
The component B comprises the following components in percentage by mass: 25% of isophorone diamine, 43% of polyether amine, 10% of m-xylylenediamine, 10% of bisphenol A, 5% of trimethyl hexamethylene dioxime, 3.5% of 2, 2' -methylene biphenol and 3.5% of 2,4, 6-tris (dimethylaminomethyl) phenol.
Example 2
The only difference from example 1 is that an equivalent amount of natural quartz sand was replaced in the washcoat slurry with micron sized diamine @ aluminum MOF particles of 2.5%.
The preparation method of the micron-sized diamine @ MOF particles comprises the following steps: adding aluminum nitrate and 4,4' -biphenyldicarboxylic acid into water according to the molar ratio of aluminum element to carboxyl being 1: 1, uniformly dispersing, heating to 180 ℃, adjusting the pH value of the obtained solution to 3, and carrying out heat preservation reaction for 6 hours; after the reaction is finished, filtering, washing, drying and crushing to obtain micron-sized aluminum MOF particles; and (3) soaking the aluminum MOF particles in a diamine solution (m-xylylenediamine), standing for adsorption for 3 hours, and performing centrifugal separation to obtain micron-sized diamine @ MOF particles.
Example 3
A structural repairing and reinforcing material for concrete chimney and cooling tower is composed of base surface repairing mortar and concrete grout. Wherein: the base surface repair mortar comprises the following components in percentage by mass: 55% of natural quartz sand and the specific surface area is more than 12000cm2Portland cement 47.8% per g, acrylate/amine acrylate/acrylate terpolymer 2%, D950.1% of < 10 μm hydraulic binder (methylcellulose), 5.0% of micron-sized diamine @ aluminium MOF particles, 0.1% of polyethylene.
Wherein the preparation method of the micron-sized diamine @ MOF particles comprises the following steps: adding aluminum nitrate and 4,4' -biphenyldicarboxylic acid into water according to the molar ratio of aluminum element to carboxyl of 1: 0.8, uniformly dispersing, heating to 160 ℃, adjusting the pH value of the obtained solution to 4, and carrying out heat preservation reaction for 5 hours; after the reaction is finished, filtering, washing, drying and crushing to obtain micron-sized aluminum MOF particles; and (3) soaking the aluminum MOF particles in a diamine solution (isophorone diamine), standing for adsorption for 4h, and performing centrifugal separation to obtain micron-sized diamine @ MOF particles.
The concrete grouting liquid comprises a component A and a component B in a mass ratio of 4.5: 2, wherein:
the component A comprises the following components in percentage by mass: 68% of bisphenol-A-epichlorohydrin resin with Mw less than 700, 10% of glycidyl 12-14 alkyl ether, 10% of 1, 6-hexanediol diglycidyl ether, 10% of bisphenol F epoxy resin with Mw less than 700 and 2% of 3- (2, 3-glycidoxy) propyl trimethoxy silane.
The component B comprises the following components in percentage by mass: 20% of isophorone diamine, 40% of polyether amine, 15% of m-xylylenediamine, 10% of bisphenol A, 10% of trimethyl hexamethylene dioxime, 2.5% of 2, 2' -methylene biphenol and 2.5% of 2,4, 6-tris (dimethylaminomethyl) phenol.
Example 4
A structural repairing and reinforcing material for concrete chimney and cooling tower is composed of base surface repairing mortar and concrete grout. Wherein: the base surface repair mortar comprises the following components in percentage by mass: 55% of natural quartz sand and the specific surface area is more than 12000cm240% of Portland cement/g, 1% of acrylate/amine acrylate/acrylate terpolymer, D950.1% of < 10 μm hydraulic binder (methylcellulose), 3.8% of micron-sized diamine @ aluminium MOF particles, 0.1% of polyethylene.
Wherein the preparation method of the micron-sized diamine @ MOF particles comprises the following steps: adding aluminum nitrate and 4,4' -biphenyldicarboxylic acid into water according to the molar ratio of aluminum element to carboxyl of 1: 1.2, uniformly dispersing, heating to 200 ℃, adjusting the pH value of the obtained solution to 2, and carrying out heat preservation reaction for 5 hours; after the reaction is finished, filtering, washing, drying and crushing to obtain micron-sized aluminum MOF particles; and (2) soaking the aluminum MOF particles in a diamine solution (m-phenylenediamine), standing for adsorption for 2h, and performing centrifugal separation to obtain micron-sized diamine @ MOF particles.
The concrete grouting liquid comprises a component A and a component B in a mass ratio of 4: 1.5, wherein:
the component A comprises the following components in percentage by mass: 60% of bisphenol-A-epichlorohydrin resin with Mw less than 700, 13% of glycidyl 12-14 alkyl ether, 15% of 1, 6-hexanediol diglycidyl ether, 10% of bisphenol F epoxy resin with Mw less than 700 and 2% of 3- (2, 3-glycidoxy) propyl trimethoxy silane.
The component B comprises the following components in percentage by mass: 30% of isophorone diamine, 40% of polyether amine, 10% of m-xylylenediamine, 10% of bisphenol A, 5% of trimethyl hexamethylene dioxime, 2% of 2, 2' -methylene biphenol and 3% of 2,4, 6-tris (dimethylaminomethyl) phenol.
Comparative example 1
Comparative example 1 differs from example 1 only in that: the base surface repair mortar comprises the following components in percentage by massThe fractional components are as follows: 50% of natural quartz sand and specific surface area of over 12000cm248.5% of Portland cement/g and 1.5% of acrylate/amine acrylate terpolymer.
Comparative example 2
Comparative example 2 differs from example 1 only in that:
the A component of the concrete grouting liquid is 100 percent of bisphenol-A-epichlorohydrin resin with Mw less than 700.
The component B of the concrete grouting liquid is 100 percent of isophorone diamine.
The index data after repairing and injection reinforcing the surface defects (artificial, same size) of the test concrete of the same batch by using the base repair mortar and the concrete grouting liquid of the examples 1-2 and the comparative example 1 are as follows:
as can be seen from the comparison of the data in the table above, the comparative example 1 is obviously inferior to the example 1 in mechanical strength after being combined with a concrete matrix and cured because a common base repair mortar is used compared with the example 1; compared with the example 1, in the comparative example 2, because the A, B component of the concrete grouting liquid is the conventional two-component epoxy resin and the curing agent thereof, the cross-linking and bonding degree of the mortar and the concrete matrix after curing is not ideal, and the corresponding mechanical strength is inferior to that of the example 1; in contrast, in example 2, the strength of the mortar itself is enhanced due to the diamine @ MOF particles contained in the mortar, and the mortar can be crosslinked and cured with the A component of the concrete grouting liquid to a higher degree, so that the mechanical strength is optimal.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a reinforced material is restoreed to concrete chimney and cooling tower's structure which characterized in that: comprises base surface repair mortar and concrete grouting liquid;
the base surface repair mortar comprises the following components in percentage by mass:
40 to 55 percent of natural quartz sand,
40 to 55 percent of Portland cement,
1-2% of acrylate/acrylamide/acrylate terpolymer,
0.0 to 0.1 percent of methyl cellulose,
diamine @ aluminum MOF particles 0.0-5.0%,
0.0 to 0.1 percent of polyethylene;
the preparation method of the diamine @ aluminum MOF particles comprises the following steps: adding aluminum nitrate and 4,4' -biphenyldicarboxylic acid into water according to the molar ratio of aluminum element to carboxyl of 1 (0.8-1.2), uniformly dispersing, heating, adjusting the pH value of the obtained solution to be acidic, and carrying out heat preservation reaction; after the reaction is finished, filtering, washing, drying and crushing to obtain micron-sized aluminum MOF particles; dipping the aluminum MOF particles into a diamine solution, standing for adsorption, and performing centrifugal separation to obtain diamine @ aluminum MOF particles;
the concrete grouting liquid comprises a component A and a component B, wherein:
the component A comprises the following components in percentage by mass:
60-68% of bisphenol-A-epichlorohydrin resin with Mw less than 700,
10-20% of glycidyl 12-14 alkyl ether,
10-20% of 1, 6-hexanediol diglycidyl ether,
10 to 20 percent of bisphenol F epoxy resin,
2-5% of 3- (2, 3-epoxypropoxy) propyl trimethoxy silane;
the component B comprises the following components in percentage by mass:
20 to 31 percent of isophorone diamine,
40 to 51 percent of polyether amine,
10 to 20 percent of m-xylylenediamine,
10 to 20 percent of bisphenol A,
5 to 10 percent of trimethyl hexamethylene dioxime,
2 to 5 percent of 2, 2' -methylene biphenol,
2-5% of 2,4, 6-tri (dimethylaminomethyl) phenol.
2. The structural repair reinforcement material of claim 1, wherein: d of the methyl cellulose95<10 microns, the specific surface area of the Portland cement is more than 12000cm2/g。
3. The structural repair reinforcement material of claim 1, wherein: the particle size of the diamine @ aluminum MOF particles is in the micron order.
4. The structural repair reinforcement material of claim 1, wherein: heating to 160-200 ℃, then adjusting the pH value of the obtained solution to 2-4, and carrying out heat preservation reaction for 5-10 h.
5. The structural repair reinforcement material of claim 1, wherein: standing for 2-4 h.
6. The structural repair reinforcement material of claim 1, wherein: the diamine is isophorone diamine, metaphenylene diamine or m-xylylenediamine.
7. The structural repair reinforcement material of claim 1, wherein: the mass ratio of the component A to the component B in the concrete grouting liquid is (4-4.5) to (1.5-2.0).
8. Use of the structural repair reinforcing material according to any one of claims 1 to 7 for the reinforcement repair of concrete chimneys and cooling towers.
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| US20070172596A1 (en) * | 2005-09-13 | 2007-07-26 | Hartman Stuart J | Epoxy sealer/healer for sealing and strengthening cracked concrete |
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| KR101422206B1 (en) * | 2014-02-14 | 2014-07-24 | 대로이엔씨(주) | High-performance flowing cement mortar composition and surface protection method of concrete structures using the composite |
| CN105884253B (en) * | 2016-04-12 | 2018-10-09 | 武汉理工大学 | The polymer mortar of Rapid-Repair and application |
| DE102016107632A1 (en) * | 2016-04-25 | 2017-10-26 | Köster Bauchemie AG | Panel or sheet-like gasket for concrete structures and methods for producing a composite waterproofing in the wall, floor and ceiling area of buildings made of cement-based materials, in particular concrete |
| CN107519927B (en) * | 2016-06-21 | 2019-10-11 | 中国石油天然气股份有限公司 | Y/ZSM-22/SAPO-34/ASA/MOF composite material and preparation method thereof |
| CN108658534B (en) * | 2018-04-24 | 2020-12-15 | 北京固斯特国际化工有限公司 | Permeable cross-linking type combined coating for corrosion prevention of cooling tower |
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