CN112694732B - Quick-setting modified unsaturated resin for maintaining steel bridge deck, preparation method and mixture preparation method - Google Patents
Quick-setting modified unsaturated resin for maintaining steel bridge deck, preparation method and mixture preparation method Download PDFInfo
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Abstract
The invention relates to a quick-setting modified unsaturated resin for maintaining steel bridge deck and a preparation method thereof, and the quick-setting modified unsaturated resin for maintaining steel bridge deck provided by the invention comprises the following components in parts by weight: 40-80 parts of unsaturated resin; 20-60 parts of modified unsaturated resin; 10-25 parts of a diluent; 1-10 parts of graphene powder; 5-10 parts of silsesquioxane; 1-10 parts of dopa; 0.5-3 parts of an accelerant and 0.5-6 parts of a curing agent. The modified unsaturated resin has the advantages of low viscosity, high strength, good toughness, good weather resistance, long service life, high curing speed and the like, the resin mixture realizes cold-stirring self-leveling, is free from rolling, improves the construction efficiency, reduces the construction difficulty and cost, saves the construction energy consumption, and has short curing time and can be repaired along with the repair. Plays an important role in promoting the development of local economy, relieving traffic pressure, saving the repeated maintenance cost of the steel bridge deck and the like.
Description
Technical Field
The invention relates to a resin material for paving roads and bridges, in particular to a quick-setting modified unsaturated resin material for maintaining steel bridge surfaces and a specific preparation method thereof.
Background
The large-span bridge in China mostly adopts an orthotropic steel box girder structure, has the characteristics of small rigidity and large flexibility, along with the increase of service life of the bridge, the improvement of traffic load and the high-temperature and rainy weather environment, more and more cracks, pit slots, tracks and other diseases appear on the steel bridge deck, the treatment method for the serious disease part is generally local excavation and backfilling, and the commonly used materials for disease maintenance and maintenance such as the pit slots mainly comprise cold-mixed epoxy resin concrete, asphalt concrete, polyurethane concrete and the like, but can not effectively meet the use requirement; for example, the cold-mixed epoxy resin material has a large difference with the original pavement modulus, so that the repaired part is easy to have secondary cracking, edge gnawing and other diseases after being used for a period of time, and meanwhile, the problems of long curing time, slow curing in winter, construction window-empty period and the like exist; the asphalt material has poor high and low temperature resistance, so that the problems of rutting, wave transition and the like are easy to occur at the repaired part, and the durability is insufficient; the polyurethane material is sensitive to water, so that the requirement on the construction environment is high, and the repairing effect of the polyurethane material is greatly reduced.
Based on the defects of the repairing material, the inventor conducts research and innovation based on the experimental and professional knowledge of years of abundant practice in the design and manufacture of the product and the application of theory, so as to create a quick-curing modified unsaturated resin material for maintaining and maintaining the steel bridge deck and a preparation method thereof, and the quick-curing modified unsaturated resin material has the advantages of high strength, good toughness, good weather resistance, long service life, high curing speed and the like, and can immediately recover the traffic after the repairing is finished. The resin mixture realizes cold mixing self-leveling, shortens the construction time, reduces the construction cost and saves the construction energy consumption.
Disclosure of Invention
One of the main purposes of the invention is to provide a quick-setting modified unsaturated resin material for maintaining steel bridge deck, which reduces the requirement on environment, improves the weather resistance, service life and curing speed of the repairing material, and improves the strength and toughness of the material by optimizing the components.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a fast-curing modified unsaturated resin for maintaining steel bridge deck, which comprises the following components in parts by weight: 40-80 parts of unsaturated resin; 20-60 parts of modified unsaturated resin; 10-25 parts of a diluent; 1-10 parts of graphene powder; 5-10 parts of silsesquioxane (POSS); 1-10 parts of dopa; 0.5-3 parts of an accelerant and 0.5-6 parts of a curing agent.
Preferably, the unsaturated resin is any one or more of phthalic acid type, isophthalic acid type, bisphenol a type and vinyl ester type unsaturated resins; further, the unsaturated resin is one or more of 191, 196, 199, 2608, 197, 3301, 323, 902, FM138, J196 or 168F; according to the invention, the matrix asphalt is modified by utilizing the high strength, high modulus, high and low temperature resistance and excellent cohesiveness of the unsaturated resin, so that the strength, high and low temperature resistance and cohesiveness with a steel plate of the asphalt are effectively improved.
Preferably, the toughening agent nylon PA6 is selected as a modification material of the modified unsaturated resin, and the toughness, tensile elongation, weather resistance and aging resistance of the resin material can be effectively improved by the modified unsaturated resin added in the invention.
Preferably, the diluent is any one of ethyl acetate, dibutyl phthalate, dioctyl phthalate and styrene; the diluent selected by the invention can effectively reduce the viscosity of the material on the basis of not influencing the performance of the cementing material, and the self-leveling of the mixture is realized by matching with high oilstone ratio without rolling, thereby simplifying the construction process.
Preferably, 5-10 layers of graphene powder are selected, the sheet diameter is 15-50 um, the graphene material with a two-dimensional structure forms a continuous heat conduction network chain structure in an unsaturated resin system through stacking and arrangement, shrinkage deformation of unsaturated resin caused by curing and heat release can be effectively reduced, meanwhile, the theoretical Young modulus value of the graphene reaches 1.0TPa, the mechanical strength of the unsaturated resin can be further improved, and the strength of the final material is effectively guaranteed.
Preferably, the silsesquioxane is selected from any one or more of 8, 10 or 12 atomic number polyphenyl silsesquioxane, polymethylsilsesquioxane and polyepoxysilsesquioxane; the three-dimensional cage-shaped structure of the silsesquioxane is linear unsaturated resin to improve the framework support, and the side chain active group can effectively improve the crosslinking degree of the silsesquioxane cage-shaped structure and unsaturated resin, so that the strength, weather resistance and toughness of the resin are further improved.
Preferably, DOPA is 3, 4-Dihydroxyphenylalanine (DOPA) or mPEG-DOPA 3 One kind of (1). The poly-bara has excellent bonding performance and can effectively improve the bonding strength between the unsaturated resin and a base surface.
Preferably, the accelerator is any one of cobalt naphthenate, N-Dimethylaniline (DMA), N-dimethyl-p-toluidine (DMT), and N, N-bis (2-hydroxyethyl) p-toluidine (DHET).
Preferably, the curing agent is any one of benzoyl peroxide, methyl ethyl ketone peroxide, cyclohexanone peroxide, t-butyl hydroperoxide, and t-butyl perbenzoate.
The second objective of the present invention is to provide a preparation method of modified unsaturated resin, which is matched with the preparation of resin material to improve the toughness, tensile elongation, weather resistance and aging resistance of the resin material.
In order to achieve the purpose, the invention adopts the technical scheme that:
A1. adding unsaturated resin monomer 1, 2-propylene glycol, phthalic anhydride and maleic anhydride into a reaction kettle, and reacting at 200-230 ℃ under the protection of inert gas to obtain polyester;
A2. adding a modified material PA6 into the polyester prepared from A1, and continuously reacting for 0.5-1 h; PA6 molecules contain a large amount of amide groups, active hydrogen on the amide groups and polyester resin can be crosslinked into a net structure at high temperature, and the flexibility of nylon are utilized to toughen the polyester resin, so that the flexibility of unsaturated resin is greatly improved;
A3. and (3) adding the material prepared from the A2 into a reaction kettle containing a styrene polymerization inhibitor, and mixing at 60-80 ℃ to obtain the modified unsaturated resin. The polymerization inhibitor has the advantages of high temperature resistance, good effect of inhibiting polymerization of unsaturated compounds and the like, can effectively inhibit thermal polymerization of unsaturated compounds, can temporarily stop chain reaction by adding the polymerization inhibitor, and controls the conversion rate of unsaturated resin in the polymerization process.
The invention also aims to provide a preparation method of the quick-setting modified unsaturated resin for maintaining the steel bridge deck, which improves the weather resistance, the service life, the curing speed, the strength and the toughness of the repairing material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
s1, adding unsaturated resin, modified unsaturated resin, graphene powder, silsesquioxane, dopa and a promoter into a diluent in sequence, and dispersing for 2 hours by using a high-speed dispersion machine to obtain a primary product modified unsaturated resin material;
s2, adding a curing agent into the primary product modified unsaturated resin material prepared in the S1 in proportion, and stirring for 2-3 min by using an electric stirrer to obtain a target product.
Preferably, the unsaturated resin is any one or more of phthalic acid type, isophthalic acid type, bisphenol a type and vinyl ester type unsaturated resins; further, the unsaturated resin is one or more of 191, 196, 199, 2608, 197, 3301, 323, 902, FM138, J196 or 168F; according to the invention, the matrix asphalt is modified by utilizing the high strength, high modulus, high and low temperature resistance and excellent cohesiveness of the unsaturated resin, so that the strength, high and low temperature resistance and cohesiveness with a steel plate of the asphalt are effectively improved.
Preferably, the toughening agent nylon PA6 is selected as a modification material of the modified unsaturated resin, and the toughness, tensile elongation, weather resistance and aging resistance of the resin material can be effectively improved by the modified unsaturated resin added in the invention.
Preferably, the diluent is any one of ethyl acetate, dibutyl phthalate, dioctyl phthalate and styrene; the diluent selected by the invention can effectively reduce the viscosity of the material on the basis of not influencing the performance of the cementing material, and the self-leveling of the mixture is realized by matching with high oilstone ratio without rolling, thereby simplifying the construction process.
Preferably, 5-10 layers of graphene powder are selected, the sheet diameter is 15-50 um, the graphene material with a two-dimensional structure forms a continuous heat conduction network chain structure in an unsaturated resin system through stacking and arrangement, shrinkage deformation of unsaturated resin caused by curing and heat release can be effectively reduced, meanwhile, the theoretical Young modulus value of the graphene reaches 1.0TPa, the mechanical strength of the unsaturated resin can be further improved, and the strength of the final material is effectively guaranteed.
Preferably, the silsesquioxane is selected from any one or more of 8, 10 or 12 atomic number polyphenyl silsesquioxane, polymethylsilsesquioxane and polyepoxysilsesquioxane; the three-dimensional cage-shaped structure of the silsesquioxane is linear unsaturated resin to improve the framework support, and the side chain active group can effectively improve the crosslinking degree of the silsesquioxane cage-shaped structure and unsaturated resin, so that the strength, weather resistance and toughness of the resin are further improved.
Preferably, DOPA is 3, 4-Dihydroxyphenylalanine (DOPA) or mPEG-DOPA 3 One kind of (1). The poly-p-phenylene ether has excellent bonding performance, and can effectively improve the bonding strength between unsaturated resin and a base surface.
Preferably, the accelerator is any one of cobalt naphthenate, N-Dimethylaniline (DMA), N-dimethyl-p-toluidine (DMT), and N, N-bis (2-hydroxyethyl) p-toluidine (DHET).
Preferably, the curing agent is any one of benzoyl peroxide, methyl ethyl ketone peroxide, cyclohexanone peroxide, t-butyl hydroperoxide, and t-butyl perbenzoate.
The fourth purpose of the invention is to provide a preparation method of the fast-curing modified unsaturated resin mixture for maintaining the steel bridge deck, which can improve the weather resistance, the service life, the curing speed, the strength and the toughness of the repairing material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
D1. and pouring the modified unsaturated resin cementing material prepared in the step S2 into the graded stone according to the oilstone ratio, and stirring for 2-3 min by using an electric stirrer to obtain a modified unsaturated resin mixture.
Preferably, the oilstone ratio of the mixture is controlled to be 13-17%, and the stone grade is selected from one of AC-5, AC-10 and AC-13; the invention adopts high oilstone ratio and AC gradation matching, can effectively provide framework strength for the mixture, simultaneously keeps good fluidity of the mixture, realizes self-leveling and saves the rolling process.
Through the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the unsaturated resin is compositely modified by adopting the modified unsaturated resin, and the modified unsaturated resin can effectively improve the properties of the resin material such as toughness, elongation, weather resistance and aging resistance, and effectively improve the overall mechanical property of the material;
2. compared with epoxy resin, polyurethane resin, acrylate resin and other resins, the unsaturated resin has low price, but the two-dimensional linear structure of the unsaturated resin causes the long-term weather resistance and durability of the silsesquioxane resin to be insufficient, the silsesquioxane main body is a Si-O-Si inorganic framework, ester groups, amino groups and other active groups are connected to the Si surface, and the silsesquioxane resin can be effectively connected with the linear chain segment of the unsaturated resin in series by combining a self three-dimensional cage structure to form a three-dimensional space three-dimensional structure, so that an organic-inorganic hybrid material is formed, a three-dimensional framework support is provided for asphalt, and the POSS can effectively improve the wettability and the cohesiveness of a cementing material to a base material;
3. the theoretical Young modulus of the graphene reaches 1.0TPa, the inherent tensile strength is 130GPa, and the graphene can effectively bridge and reinforce the cementing material by combining a two-dimensional lamellar structure of the graphene, so that the strength and modulus of the cementing material are improved and are equivalent to those of the original pavement, and the durability of the pavement is improved; meanwhile, the graphene has excellent heat conduction and heat dissipation performance, can effectively release heat generated by a curing reaction, and avoids the shrinkage of a mixture;
4. the 3, 4-dihydroxyphenylalanine component of the dobba can react with basal metal ions and oxides (Fe) thereof 3+ ，Mn 3 + ) Semi-metals (such as silicon) are combined to form chemical bonds, so that the bonding strength of resin and a base surface is effectively improved, and the mixed material is prevented from falling off;
5. according to the invention, an unsaturated resin curing mechanism is adopted, the curing speed of the mixture is high, the curing time is short, and the high oilstone ratio and mechanical stirring are matched, so that the pit repairing speed can be effectively improved, the curing time is shortened, the traffic is opened in advance, and the traffic pressure is relieved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
The preparation process of the modified unsaturated resin comprises the following steps:
A1. adding 160 parts of unsaturated resin monomer, namely 1, 2-propylene glycol, 150 parts of phthalic anhydride and 100 parts of maleic anhydride into a reaction kettle, and reacting at 200-230 ℃ under the protection of inert gas to obtain polyester;
A2. adding 20 parts of modified material PA6 into the polyester, and continuously reacting for 0.5-1 h;
A3. adding the material prepared from A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mixing at 60-80 ℃ to obtain the modified unsaturated resin.
The preparation method of the quick-setting modified unsaturated resin mixture for maintaining the steel bridge surface comprises the following operation steps:
s1, adding 40 parts of unsaturated resin (191), 60 parts of modified unsaturated resin, 10 parts of graphene powder, 10 parts of silsesquioxane, 10 parts of DOPA (DOPA) and 1 part of promoter (cobalt naphthenate) into 25 parts of diluent (ethyl acetate) in sequence, and dispersing for 2 hours by adopting a high-speed dispersion machine to obtain a modified unsaturated resin material;
s2, adding 2 parts of curing agent (benzoyl peroxide) into the modified unsaturated resin material prepared in the S1, and stirring for 2-3 min by using an electric stirrer to obtain a modified unsaturated resin cementing material;
s3, pouring the modified unsaturated resin cementing material into a certain-grade stone material according to the oil-stone ratio of 13%, wherein the concrete grade is shown in Table 1, and stirring for 2-3 min by using an electric stirring machine to obtain a modified unsaturated resin mixture.
Example 2
The preparation process of the modified unsaturated resin comprises the following steps:
A1. adding 160 parts of 1, 2-propylene glycol, 150 parts of phthalic anhydride and 100 parts of maleic anhydride of an unsaturated resin monomer into a reaction kettle, and reacting at 200-230 ℃ under the protection of inert gas to obtain polyester;
A2. adding 20 parts of modified material PA6 into the polyester, and continuously reacting for 0.5-1 h;
A3. and (3) adding the material prepared from the A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mixing at 60-80 ℃ to obtain the modified unsaturated resin.
The preparation method of the quick-setting modified unsaturated resin mixture for maintaining the steel bridge surface comprises the following operation steps:
s1, sequentially mixing 80 parts of unsaturated resin (196), 20 parts of modified unsaturated resin, 2 parts of graphene powder, 5 parts of bis-silsesquioxane and DOPA (3 PEG-DOPA) 3 )1 part and 2 parts of an accelerating agent (DMA) are sequentially added into 10 parts of a diluting agent (dibutyl phthalate), and a high-speed dispersion machine is adopted for dispersing for 2 hours to obtain a modified unsaturated resin material;
s2, adding 4 parts of curing agent (methyl ethyl ketone peroxide) into the modified unsaturated resin material prepared in the S1, and stirring for 2-3 min by using an electric stirrer to obtain a modified unsaturated resin cementing material;
s3, pouring the modified unsaturated resin cementing material into a certain-grade stone material according to the oil-stone ratio of 17%, wherein the concrete grade is shown in Table 1, and stirring for 2-3 min by using an electric stirring machine to obtain a modified unsaturated resin mixture.
Example 3
The preparation process of the modified unsaturated resin comprises the following steps:
A1. adding 160 parts of 1, 2-propylene glycol, 150 parts of phthalic anhydride and 100 parts of maleic anhydride of an unsaturated resin monomer into a reaction kettle, and reacting at 200-230 ℃ under the protection of inert gas to obtain polyester;
A2. adding 20 parts of modified material PA6 into the polyester, and continuously reacting for 0.5-1 h;
A3. adding the material prepared from A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mixing at 60-80 ℃ to obtain the modified unsaturated resin.
The preparation method of the quick-setting modified unsaturated resin mixture for maintaining the steel bridge surface comprises the following operation steps:
s1, sequentially mixing 50 parts of unsaturated resin (323), 50 parts of modified unsaturated resin, 8 parts of graphene powder, 7 parts of silsesquioxane and 5PEG-DOPA 3 )5 parts of the modified unsaturated resin material and 1.5 parts of the accelerant (DMT) are sequentially added into 18 parts of the diluent (dioctyl phthalate), and dispersed for 2 hours by adopting a high-speed dispersion machine to obtain the modified unsaturated resin material;
s2, adding 3 parts of a curing agent (cyclohexanone peroxide) into the modified unsaturated resin material prepared in the S1, and stirring for 2-3 min by using an electric stirrer to obtain a modified unsaturated resin cementing material;
s3, pouring the modified unsaturated resin cementing material into a certain-grade stone material according to the oil-stone ratio of 17%, wherein the concrete grade is shown in Table 1, and stirring for 2-3 min by using an electric stirring machine to obtain a modified unsaturated resin mixture.
Example 4
The preparation process of the modified unsaturated resin comprises the following steps:
A1. adding 160 parts of 1, 2-propylene glycol, 150 parts of phthalic anhydride and 100 parts of maleic anhydride of an unsaturated resin monomer into a reaction kettle, and reacting at 200-230 ℃ under the protection of inert gas to obtain polyester;
A2. adding 20 parts of modified material PA6 into polyurethane, and continuing to react for 0.5-1 h;
A3. and (3) adding the material prepared from the A2 into a reaction kettle containing 170 parts of styrene polymerization inhibitor, and mixing at 60-80 ℃ to obtain the modified unsaturated resin.
The preparation method of the quick-setting modified unsaturated resin mixture for maintaining steel bridge deck comprises the following operation steps:
s1, sequentially adding 60 parts of unsaturated resin (902), 40 parts of modified unsaturated resin, 3 parts of graphene powder, 6 parts of silsesquioxane, 7 parts of DOPA (DOPA) and 3 parts of accelerant (DHET) into 13 parts of diluent (styrene), and dispersing for 2 hours by using a high-speed dispersion machine to obtain a modified unsaturated resin material;
s2, adding 6 parts of a curing agent (tert-butyl hydroperoxide) into the modified unsaturated resin material prepared in the S1, and stirring for 2-3 min by using an electric stirrer to obtain a modified unsaturated resin cementing material;
s3, pouring the modified unsaturated resin cementing material into a certain-grade stone material according to the oil-stone ratio of 13%, wherein the concrete grade is shown in Table 1, and stirring for 2-3 min by using an electric stirring machine to obtain a modified unsaturated resin mixture.
Comparative example 1
Pouring the epoxy resin cementing material into a certain-grade stone material according to the oil-stone ratio of 8.5 percent, specifically, the grade is shown in table 1, stirring the materials for 3-5min by using an electric mixer to obtain an epoxy resin mixture, and rolling and molding the epoxy resin mixture.
Comparative example 2
Pouring the polyurethane cementing material into a certain-grade stone material (stone material needs to be dried) according to the oil-stone ratio of 13 percent, wherein the concrete grade is shown in table 1, and stirring by using an electric mixer for 3-5min to obtain a polyurethane resin mixture.
In the above examples 1 to 4 and comparative examples 1 to 2, the stone composition grades used are shown in Table 1 below:
table 1 various examples stone grading
The above examples are the results of performance tests of modified unsaturated resins, epoxy resins, polyurethane materials and their respective mixtures, which are prepared by the present invention, and are specifically shown in table 2:
table 2 results of performance testing
According to the test results, compared with the existing technology of adopting epoxy resin or polyurethane as the cementing material, the modified unsaturated resin material provided by the invention effectively improves the construction workability and mechanical property of the maintenance quick-setting type repairing cementing material, so that the mixture has excellent road performance, and effectively relieves traffic pressure while being quickly cured. The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the present invention.
Claims (7)
1. The fast-curing modified unsaturated resin for maintaining steel bridge deck is characterized by comprising the following components in parts by weight: 40-80 parts of unsaturated resin; 20-60 parts of modified unsaturated resin; 10-25 parts of a diluent; 1-10 parts of graphene powder; 5-10 parts of silsesquioxane; 1-10 parts of DOPA (DOPA); 0.5-3 parts of an accelerator and 0.5-6 parts of a curing agent;
the modified material of the modified unsaturated resin is a toughening agent nylon PA 6;
the unsaturated resin is any one or more of phthalic acid type, isophthalic acid type, bisphenol A type and vinyl ester type unsaturated resin;
the preparation steps of the modified unsaturated resin are as follows:
A1. adding unsaturated resin monomer 1, 2-propylene glycol, phthalic anhydride and maleic anhydride into a reaction kettle, and reacting at 200-230 ℃ under the protection of inert gas to obtain polyester;
A2. adding a toughening agent nylon PA6 into the product polyester of A1, and continuously reacting for 0.5-1 h;
A3. and (3) adding the material prepared from the A2 into a reaction kettle containing a styrene polymerization inhibitor, and mixing at 60-80 ℃ to obtain the target product modified unsaturated resin.
2. The fast-curing modified unsaturated resin for maintenance of steel bridge deck according to claim 1, wherein the diluent is any one of ethyl acetate, dibutyl phthalate, dioctyl phthalate and styrene.
3. The fast-curing modified unsaturated resin for steel bridge deck maintenance according to claim 2, wherein the graphene powder comprises 5-10 layers and has a sheet diameter of 15-50 um.
4. The quick-setting modified unsaturated resin for maintaining steel bridge deck according to any one of claims 1 to 3, wherein the silsesquioxane is one or more of silsesquioxane with a closed cage structure formed by linking 8, 10 or 12 silicon atoms and oxygen atoms, and the side chain is one or more of alkyl, unsaturated double bond group, carboxyl, hydroxyl, ester group, anhydride group, amino, epoxy group and melamine group.
5. The fast-setting modified unsaturated resin for maintaining steel bridge surface according to claim 4, wherein the accelerator is any one of cobalt naphthenate, N-Dimethylaniline (DMA), N-dimethyl-p-toluidine (DMT), and N, N-bis (2-hydroxyethyl) p-toluidine (DHET).
6. The preparation method of the fast-curing modified unsaturated resin for maintaining steel bridge surfaces according to claim 1 is characterized by comprising the following steps of: comprises the following operation steps of a first step of,
s1, sequentially adding unsaturated resin, modified unsaturated resin, graphene powder, silsesquioxane, DOPA (DOPA) and a promoter into a diluent, and dispersing at a high speed for 2 hours to obtain a primary product;
s2, adding a curing agent into the primary product prepared in the S1, and stirring for 2-3 min to obtain a target product.
7. A quick-setting modified unsaturated resin mixture for maintaining steel bridge deck is characterized in that: pouring the fast-curing modified unsaturated resin for maintaining the steel bridge deck prepared according to the method in claim 6 into graded stone, and stirring for 2-3 min to obtain a target product modified unsaturated resin mixture.
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| CN103114526B (en) * | 2013-03-07 | 2015-03-25 | 江苏省交通科学研究院股份有限公司 | Steel bridge deck pavement cold mixing maintenance material and manufacturing method thereof |
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