CN110903051A - Environment-friendly high-durability epoxy mortar - Google Patents
Environment-friendly high-durability epoxy mortar Download PDFInfo
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- CN110903051A CN110903051A CN201911069712.8A CN201911069712A CN110903051A CN 110903051 A CN110903051 A CN 110903051A CN 201911069712 A CN201911069712 A CN 201911069712A CN 110903051 A CN110903051 A CN 110903051A
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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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Epoxy Resins (AREA)
Abstract
The invention provides environment-friendly high-durability epoxy mortar, and belongs to the technical field of building materials. The mortar consists of a component A and a component B, wherein the component A comprises at least one of graded sandstone and cement, epoxy resin, a carbonyl compound, a glycidyl ether compound and an interfacial agent, and the component B comprises an amine curing agent, a curing accelerator and a humid environment functional curing agent. According to the mortar disclosed by the invention, the carbonyl compound and the glycidyl ether compound are compounded to be used as the diluent, so that the hardness, flexibility, adhesion, durability and dilutability of a mortar layer can be synergistically improved, the shrinkage rate and cost of the mortar layer are reduced, and the mortar is beneficial to environmental protection and safety; the curing agent with the function of moist environment is added to ensure that the curing agent can be cured smoothly in moist environment, so that the construction applicability is stronger.
Description
Technical Field
The invention belongs to the technical field of building materials, and relates to environment-friendly high-durability epoxy mortar.
Background
The concrete structure in the hydraulic engineering structure is easily subjected to impact abrasion of silt in water under the driving of high-speed water flow, and has great impact speed and destructive power under the carrying of the high-speed water flow; in addition, the high-speed water flow can generate cavities, thereby causing cavitation erosion; in addition, some corrosive substances existing in water can also enter the interior of the concrete structure to generate a corrosive effect; the combined action of these damaging factors can cause serious damage to the concrete structure. Under such harsh conditions, the common cement mortar or polymer mortar has the defects of low mechanical strength, poor abrasion resistance, low adhesion with a base surface and the like, and is difficult to meet the use requirements, and the phenomena of large-area cavities, falling off and other damage phenomena are easy to occur. The epoxy resin has strong strength, adhesion, wear resistance, water resistance and corrosion resistance, but the toughness is relatively poor.
The existing epoxy modified mortar usually consists of epoxy resin, a diluent, an auxiliary agent, sand and other functional fillers, a curing agent and an accelerant (some of the diluents contain a functional curing agent or a catalyst), but most of the diluents are non-reactive diluents, for example, in patent CN104844096A, the non-reactive diluents can cause environmental problems of environmental pollution or water body, potential safety hazards of harming health of constructors and flammability and explosiveness exist in the construction process, the non-reactive diluents do not participate in the curing reaction of the mortar, and the mortar has the defects of large shrinkage rate, poor mechanical property and poor adhesion and the like.
In addition, the environment humidity of hydraulic buildings, tidal zones and the like is very high, even the construction base surface is wet, and curing agents which can be normally cured under the conditions of humidity and water environment are not adopted, so that the problems of incomplete mortar curing, performance reduction and the like are easily caused, and particularly, the small-molecular aliphatic amine curing agents are easily dissolved in water to seriously influence the mortar curing.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention aims to provide the environment-friendly high-durability epoxy mortar, so that the hardness, flexibility, adhesion and durability of the material are improved, the shrinkage rate and cost of the material are reduced, the environment friendliness and safety are facilitated, and the curing performance of the epoxy mortar in a humid environment can be ensured.
In order to achieve the purpose, the invention adopts the technical scheme that: an environment-friendly high-durability epoxy mortar consists of a component A and a component B, wherein the weight ratio of the component A to the component B is 100: 3-20; the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
5-40 parts of amine curing agent,
0-40 parts of a humid environment functional curing agent,
1-12 parts of a curing accelerator;
wherein the reactive diluent comprises an infiltration solidification type reactive diluent and a toughening reactive diluent; the infiltration solidification type reactive diluent is a carbonyl compound, and the toughening reactive diluent is a glycidyl ether compound. The carbonyl compound can improve the hardness of the mortar layer, improve the bonding property of the mortar layer and a base surface, improve the dilution property of the mortar material and reduce the cost; the glycidyl ether compound can improve the content of epoxy groups on the basis of reducing viscosity, and improve the flexibility and the abrasion resistance of a mortar layer, so that the durability of the mortar layer is improved, and the environmental protection property of the mortar material is also improved; the carbonyl compound and the glycidyl ether compound are compounded to be used as a diluent, so that the hardness, flexibility, adhesion and durability of the mortar layer can be synergistically improved, the shrinkage rate and cost of the mortar layer are reduced, and the environment-friendly and safe mortar layer is facilitated. The humidity of air in a humid environment is high, such as a hydraulic environment or a tunnel environment, and the curing of micromolecule amines is seriously influenced, so that the curing of epoxy mortar is delayed or the reaction efficiency is reduced, the final strength of a mortar layer is possibly reduced, and the mortar can be still cured smoothly in a harsh environment by adopting a humid environment functional curing agent, so that the strength of the mortar layer is ensured.
In a preferred embodiment of the mortar of the present invention, the infiltration-consolidation reactive diluent includes a ketone compound and an aldehyde compound. The ketone compound and the aldehyde compound are micromolecular diluents, can react under the action of a curing agent to be activated, conversion from non-reactive diluents to reactive diluents is achieved, the mechanical property and the hardness of a product can be improved synergistically, meanwhile, the diluting capacity of a system is enhanced, the product cost is reduced, in addition, migration of the micromolecular reactive diluents in the construction process can play a role in infiltration consolidation enhancement, and the micromolecular reactive diluents can be tightly combined with an interface agent and a concrete base surface to improve the bonding strength of a mortar material on the concrete base surface, and further improve the durability of the mortar material.
In a further preferred embodiment of the mortar of the present invention, the molar ratio of the ketone compound to the aldehyde compound is a ratio of the ketone compound: the aldehyde compound is 0.7-1.3: 1. When the molar ratio of the ketone compound to the aldehyde compound is in the range of ketone compound: when the aldehyde compound is in the range of 0.7 to 1.3:1, the mechanical properties, hardness, adhesive strength and the like of the obtained mortar material are better than those outside the range.
As a preferred embodiment of the mortar of the invention, the ketone compound comprises at least one of acetone, acetophenone, butanone, methyl isobutyl ketone, isophorone, diacetone alcohol, cyclohexanone, cycloheptanone, 2-pentanone, 3-pentanone, 2-hexanone, 2-heptanone, 3-heptanone, 4-heptanone, 2-octanone, 3-octanone, 2-nonanone.
In a more preferred embodiment of the mortar of the invention, the ketone compound is at least one of cyclohexanone, cycloheptanone, 2-heptanone, 4-heptanone, 2-octanone, 2-nonanone and diacetone alcohol. The ketone compounds with low toxicity and high flash point, such as cyclohexanone, cycloheptanone, 2-heptanone, 4-heptanone, 2-octanone, 2-nonanone, diacetone alcohol and the like, can avoid potential safety hazards in the construction process and are more environment-friendly.
As a preferred embodiment of the mortar of the present invention, the aldehyde compound includes at least one of furfural, benzaldehyde, phenylacetaldehyde, n-hexanal, n-heptanal, n-octanal, cinnamaldehyde, and citral.
In a more preferred embodiment of the mortar of the present invention, the aldehyde compound is at least one of benzaldehyde, phenylacetaldehyde, n-octylaldehyde, citral and cinnamaldehyde. The aldehyde compounds with low toxicity and high flash points, such as benzaldehyde, phenylacetaldehyde, n-octyl aldehyde, citral, cinnamaldehyde and the like, can avoid potential safety hazards in the construction process and are more environment-friendly.
As a preferred embodiment of the mortar of the present invention, the glycidyl ether compound includes at least one of allyl glycidyl ether, butyl glycidyl ether, phenyl glycidyl ether, and benzyl glycidyl ether.
As a preferable embodiment of the mortar of the invention, in the component B, the humid environment functional curing agent accounts for 5-40 parts by weight.
As a preferred embodiment of the mortar of the invention, the humid environment functional curing agent comprises at least one of Mannich addition modified amine, isocyanate, ketimine, polythiol.
In a preferred embodiment of the mortar of the present invention, the epoxy resin is at least one of a bisphenol a type epoxy resin and a bisphenol F type epoxy resin.
In a more preferred embodiment of the mortar of the present invention, the epoxy resin is at least one of E44 and E51.
As a preferred embodiment of the mortar of the invention, the interfacial agent comprises at least one of a silane coupling agent and a titanate coupling agent.
As a preferred embodiment of the mortar of the invention, the graded sand comprises medium sand, 50-200 mesh quartz sand and 325 mesh quartz powder, and the cement comprises ordinary 425 cement.
In a preferred embodiment of the mortar of the present invention, the amine-based curing agent includes at least one of aliphatic amine, alicyclic amine, aromatic amine, modified polyamine, and low molecular weight polyamide. Wherein the modified polyamine comprises chemically modified aliphatic amine, chemically modified alicyclic amine, chemically modified aromatic amine and other chemically modified amines. In a more preferred embodiment of the mortar of the present invention, the amine curing agent includes at least one of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, diethylaminopropylamine, 590, 593, 650, 651, 810, and 910. Wherein 590, 593, 810 and 910 are modified polyamine curing agents; 650 and 651 are oligoamide type curing agents.
As a preferred embodiment of the mortar of the invention, the curing accelerator comprises at least one of triethanolamine, tetramethylguanidine, benzyldimethylamine, piperidine, N' -dimethylpiperazine, 2- (dimethylaminomethyl) phenol, 2,4, 6-tris (dimethylamino) phenol (i.e. DMP-30), triphenylphosphine, 2-methylimidazole, 2-phenylimidazole, bicyclic amidine.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the mortar disclosed by the invention, the carbonyl compound and the glycidyl ether compound are compounded to be used as the diluent, so that the hardness, flexibility, adhesion, durability and dilutability of a mortar layer can be synergistically improved, the shrinkage rate and cost of the mortar layer are reduced, and the mortar is beneficial to environmental protection and safety.
(2) The mortar can be successfully cured in a humid environment by adding the humid environment functional curing agent, and the construction applicability is stronger.
(3) The mortar has excellent impact resistance, wear resistance, flexibility, tensile property, adhesion property with a concrete base material, and excellent waterproof and anticorrosive properties.
(4) The mortar has excellent plastering performance and can be applied to concrete base surfaces of planes, facades and even top surfaces.
(5) The mortar can be used as a waterproof, anticorrosion and reinforced structural layer of concrete, and can also be used in the fields of concrete repair and abrasion resistance.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The invention discloses an embodiment of environment-friendly high-durability epoxy mortar, which comprises the following components in percentage by weight: the component A and the component B comprise 100:11.5 of the component B;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
5 parts of diethylenetriamine (amine curing agent),
35 parts of polythiol (curing agent with moist environment function),
2 parts of DMP-30 (curing accelerator).
Example 2
The invention discloses an embodiment of environment-friendly high-durability epoxy mortar, which comprises the following components in percentage by weight: the component A and the component B comprise 100:8.5 of the component B;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
10 portions of amine curing agent 593 (amine curing agent),
40 parts of polythiol (a humid environment functional curing agent),
3 parts of benzyl dimethylamine (curing accelerator).
Example 3
The invention discloses an embodiment of environment-friendly high-durability epoxy mortar, which comprises the following components in percentage by weight: the component A consists of 100: 3;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
25 parts of polyamide (amine curing agent),
22.5 parts of Mannich modified amine (a humid environment functional curing agent),
12 parts of triethanolamine (curing accelerator).
Example 4
The invention discloses an embodiment of environment-friendly high-durability epoxy mortar, which comprises the following components in percentage by weight: the component A and the component B consist of 100: 20;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
40 parts of polyamide 651 (amine curing agent),
5 parts of Mannich modified amine (a humid environment functional curing agent),
6.5 parts of DMP-30 (curing accelerator).
Example 5
The invention discloses an embodiment of environment-friendly high-durability epoxy mortar, which comprises the following components in percentage by weight: the component A consists of 100:8 component A and component B;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
59322.5 parts of amine curing agent, namely,
12 parts of Mannich modified amine (a humid environment functional curing agent),
and 1 part of triethanolamine (curing accelerator).
Comparative example 1
The comparative example relates to mortar, which comprises the following components in percentage by weight: the component A and the component B comprise 100:11.5 of the component B;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
5 parts of diethylenetriamine (serving as a main component),
35 parts of polythiol, namely 35 parts of polythiol,
DMP-302 parts.
Comparative example 2
The comparative example relates to mortar, which comprises the following components in percentage by weight: the component A and the component B are 11.5;
wherein the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
5 parts of diethylenetriamine (serving as a main component),
35 parts of polythiol, namely 35 parts of polythiol,
DMP-302 parts.
Examples of effects
The mortar of examples 1-5 and comparative examples 1-2 were tested for properties such as adhesive strength and compressive strength according to JG/T289-2010, and the results are shown in Table 1.
TABLE 1 mortar Performance test results in examples 1-5 and comparative examples 1-2
| Sample (I) | Adhesive strength/MPa | Compressive strength (7d)/MPa | Compressive strength (28d)/MPa |
| Example 1 | 3.6 | 76 | 90 |
| Example 2 | 3.2 | 67 | 77 |
| Example 3 | 2.7 | 59 | 65 |
| Example 4 | 3.9 | 82 | 100 |
| Example 5 | 3.2 | 65 | 74 |
| Comparative example 1 | 3.0 | 42 | 55 |
| Comparative example 2 | 2.4 | 60 | 72 |
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention; it should be further noted that reasonable deviations are within the scope of this application, and that ratios obtained by rounding off different starting materials are within the scope of this application.
Claims (10)
1. The environment-friendly high-durability epoxy mortar is characterized by comprising a component A and a component B, wherein the weight ratio of the component A to the component B is 100: 3-20; the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
5-40 parts of amine curing agent,
0-40 parts of a humid environment functional curing agent,
1-12 parts of a curing accelerator;
wherein the reactive diluent comprises an infiltration solidification type reactive diluent and a toughening reactive diluent; the infiltration solidification type reactive diluent is a carbonyl compound, and the toughening reactive diluent is a glycidyl ether compound.
2. Mortar according to claim 1, characterized in that: the infiltration solidification type reactive diluent comprises aldehyde compounds and ketone compounds.
3. Mortar according to claim 2, characterized in that: the molar ratio of the ketone compound to the aldehyde compound is that the ketone compound: the aldehyde compound is 0.7-1.3: 1.
4. Mortar according to claim 2, characterized in that: the ketone compound comprises at least one of acetone, acetophenone, butanone, methyl isobutyl ketone, isophorone, diacetone alcohol, cyclohexanone, cycloheptanone, 2-pentanone, 3-pentanone, 2-hexanone, 2-heptanone, 3-heptanone, 4-heptanone, 2-octanone, 3-octanone and 2-nonanone; the aldehyde compound comprises at least one of furan formaldehyde, benzaldehyde, phenylacetaldehyde, n-hexanal, n-heptanal, n-octanal, cinnamaldehyde and citral.
5. Mortar according to claim 1, characterized in that: the glycidyl ether compound comprises at least one of allyl glycidyl ether, butyl glycidyl ether, phenyl glycidyl ether and benzyl glycidyl ether.
6. Mortar according to claim 1, characterized in that: in the component B, 5-40 parts by weight of the humid environment functional curing agent is added; the humid environment functional curing agent comprises at least one of Mannich addition modified amine, isocyanate, ketimine and polythiol.
7. Mortar according to claim 1, characterized in that: the epoxy resin comprises at least one of bisphenol A type epoxy resin and bisphenol F type epoxy resin.
8. Mortar according to claim 1, characterized in that: the interface agent comprises at least one of silane coupling agent and titanate coupling agent.
9. Mortar according to claim 1, characterized in that: the graded sand comprises medium sand, 50-200 meshes of quartz sand and 325 meshes of quartz powder, and the cement comprises ordinary 425 cement.
10. Mortar according to claim 1, characterized in that: the amine curing agent comprises at least one of aliphatic amine, alicyclic amine, aromatic amine, modified polyamine and polyamide, and the curing accelerator comprises at least one of triethanolamine, tetramethylguanidine, benzyldimethylamine, piperidine, N' -dimethylpiperazine, 2- (dimethylaminomethyl) phenol, 2,4, 6-tris (dimethylamino) phenol (namely DMP-30), triphenylphosphine, 2-methylimidazole, 2-phenylimidazole and bicyclic amidine.
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