Rib planting glue and preparation method thereof
By using specific proportions of component A and component B, the problem of insufficient strength of existing component A is solved, and the effect of high strength and long-term stability is achieved, and it is suitable for building structure reinforcement in complex environments.
Patent Information
- Application Number
- CN202510110217.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-04-15
AI Technical Summary
The existing reinforcement rubber has low strength and is difficult to withstand large tension, which affects the stability and safety of the building structure.
The planting rubber with component A and component B with a mass ratio of 3 to 6:1 is used. The A component includes epoxy resin, bisepoxy, polymers of phenol, formaldehyde and glycidyl ether, diluent, polypropylene glycidyl ether and filler. The B component is a curing agent, and the strength of the planting rubber is improved by modifying epoxy resin and adding filler.
It significantly improves the strength and stability of the reinforcement rubber, extends the application period at 10℃ in winter, and ensures the long-term reliability and safety of the building structure.
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of rebar planting glue, and in particular to a rebar planting glue and a preparation method thereof. Background Art
[0002] In the field of construction engineering, anchor glue, as a key building material, is widely used in the reinforcement and connection of concrete structures. The commonly used matrix material of anchor glue is epoxy resin. However, due to the high flexibility of epoxy resin molecular chains, the lack of rigid groups or insufficient cross-linking density, the molecular chains are prone to slip and deformation when subjected to tension, and it is difficult to withstand large tension, resulting in the problem of low strength of anchor glue. In construction projects, the insufficient strength of anchor glue may affect the stability and safety of the building structure, resulting in hidden dangers such as cracks and debonding. Therefore, based on the existing problems of anchor glue, a high-strength anchor glue is needed. Summary of the invention
[0003] The invention provides a reinforcing bar planting glue and a preparation method thereof, which solves the problem of low strength of the reinforcing bar planting glue in the related art.
[0004] The technical solution of the present invention is as follows: The present invention provides a tendon planting glue, comprising a component A and a component B in a mass ratio of 3 to 6:1; The component A comprises the following raw materials in parts by weight: 6-18 parts of epoxy resin, 8-15 parts of dimethyl dioxirane, 10-20 parts of a polymer of phenol, formaldehyde and glycidyl ether, 5-12 parts of a diluent, 5-10 parts of polypropylene glycol glycidyl ether, and 15-25 parts of a filler; The raw materials of the B component include a curing agent.
[0005] As a further technical solution, the mass ratio of the polymer of phenol, formaldehyde and glycidyl ether to the polypropylene glycol glycidyl ether is 12:8-13:7.
[0006] In the present invention, when the mass ratio of the polymer of phenol, formaldehyde and glycidyl ether and polypropylene glycol glycidyl ether is 12:8-13:7, the strength of the anchor glue can be improved, and the applicable period of the anchor glue at 10°C in winter can be increased.
[0007] As a further technical solution, the component A further comprises the following raw materials in parts by weight: 5 to 10 parts of a thixotropic agent.
[0008] As a further technical solution, the thixotropic agent includes an inorganic thixotropic agent and / or an organic thixotropic agent; The inorganic thixotropic agent includes one or more of bentonite, silicon dioxide, and magnesium aluminum silicate.
[0009] In the present invention, adding a thixotropic agent to the rebar-planting glue can improve its rheological properties. During the rebar-planting construction process, the thixotropic agent can prevent the rebar-planting glue from flowing freely when it is stationary, thereby ensuring that the rebar-planting glue can stably adhere to the building materials and maintain good filling properties; wherein, the inorganic thixotropic agent is preferably bentonite or silica.
[0010] As a further technical solution, the epoxy resin includes hydantoin epoxy resin; the molecular weight of the hydantoin epoxy resin is 200-280.
[0011] In the present invention, hydantoin epoxy resin with a molecular weight of 200-280 is used as one of the raw materials of the rebar embedding glue, and has the characteristic of low viscosity, which makes the rebar embedding glue easier to operate and flow during the construction process, and can better fill the gap between the steel bars and concrete, so that the rebar embedding glue maintains stable performance under different environmental conditions, ensuring the long-term reliability of the rebar embedding structure.
[0012] As a further technical solution, the curing agent includes aliphatic amine curing agent and aromatic amine curing agent in a mass ratio of 1:0.8-1.7.
[0013] In the present invention, aliphatic amine curing agents and aromatic amine curing agents are used together as curing agents for the rebar embedding glue, which have high reaction activity and can quickly undergo a cross-linking reaction with the epoxy resin in the rebar embedding glue, so that the rebar embedding glue is cured in a relatively short time. At the same time, the rebar embedding glue cured product can be endowed with higher thermal stability and mechanical strength. Even when used in a high temperature environment, the rebar embedding glue of the present invention still maintains good performance after curing; wherein, the aliphatic amine curing agent can be an aliphatic polyamine, such as: ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, etc., preferably diethylenetriamine and triethylenetetramine; the aromatic curing agent can be 4,4'-diaminodiphenyl sulfone, diaminodiphenylmethane, 3-m-phenylenediamine, etc., preferably 3-m-phenylenediamine.
[0014] As a further technical solution, the filler includes metal oxides and / or carbides.
[0015] In the present invention, metal oxides and / or carbides are uniformly dispersed in the matrix of the rebar embedding glue, and the movement of the chain segments is restricted by the interaction with the polymer chains, thereby improving the strength of the rebar embedding glue and making the rebar embedding glue have better stability; wherein the metal oxides may be, for example, titanium dioxide, aluminum oxide, zinc oxide, etc., preferably aluminum oxide; the carbides may be, for example, silicon carbide, boron carbide, titanium carbide, etc., preferably silicon carbide.
[0016] As a further technical solution, when the filler is metal oxide and carbide, the mass ratio of the metal oxide to the carbide is 1:1-3.
[0017] As a further technical solution, the diluent includes one or more of benzyl alcohol, acetone, and ethyl acetate.
[0018] In the present invention, the addition of a diluent in the anchor glue can effectively reduce the viscosity of the epoxy resin, making the epoxy resin easier to mix and process during operation, and at the same time, can improve the performance and glossiness of the epoxy resin cured product to a certain extent; the diluent is preferably benzyl alcohol.
[0019] The present invention also provides a method for preparing the reinforcing bar planting glue, comprising the following steps: S1, reacting epoxy resin and dimethyl dioxirane under the action of a catalyst to obtain a modified epoxy resin; S2, mixing the modified epoxy resin and the remaining raw materials of the A component to obtain the A component; S3, mixing the raw materials of the A component and the B component to obtain the reinforcing bar adhesive.
[0020] In the present invention, epoxy resin and dimethyl dioxirane are reacted under the action of a catalyst to prepare a rebar-anchoring adhesive. Due to the unique molecular chain segments and cross-linked structures of the modified epoxy resin, the strength and other properties of the rebar-anchoring adhesive are improved, and the application of the rebar-anchoring adhesive in more complex environments is expanded.
[0021] As a further technical solution, the reaction temperature is 50-100° C. and the reaction time is 45-60 min.
[0022] As a further technical solution, the reaction is first carried out at 50°C for 15-20 minutes, then heated to 80°C for 15-20 minutes, and then heated to 100°C for 15-20 minutes.
[0023] In the present invention, the catalyst may be a basic catalyst, preferably an amine catalyst, more preferably a tertiary amine catalyst, such as triethylamine.
[0024] The working principle and beneficial effects of the present invention are: In the present invention, the rebar-embedding glue comprises component A and component B. Component A uses epoxy resin, dimethyl dioxirane, and components of a polymer of phenol, formaldehyde, and glycidyl ether as raw materials. The addition of the polymer of phenol, formaldehyde, and glycidyl ether can improve the strength of the rebar-embedding glue. Component B is mainly a curing agent, which is a key component that promotes the curing of the rebar-embedding glue. It chemically reacts with the epoxy resin and other components in component A to transform the rebar-embedding glue from a liquid state to a solid state, forming a cured product with high strength and good adhesion, and finally obtaining a high-strength rebar-embedding glue. DETAILED DESCRIPTION
[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] In the following examples and comparative examples, the epoxy resin is hyaluronic acid epoxy resin, model MHR-070, purchased from Hubei Xitai Chemical Co., Ltd.; Phenol, polymer with formaldehyde and polypropylene glycol glycidyl ether, CAS No. 28064-14-4, purchased from Hubei Baidu Chemical Co., Ltd.; Polypropylene glycol glycidyl ether is polypropylene glycol diglycidyl ether, brand XY207A, purchased from Anhui Xinyuan Technology Co., Ltd.; The particle size of nano-alumina is 30 nm, the particle size of silicon carbide is 100 nm, the particle size of silicon dioxide is 100 nm, and the particle size of bentonite is 10 μm.
[0027] Example 1 The anchor glue comprises a component A and a component B in a mass ratio of 3:1; Component A includes the following raw materials in parts by weight: 6 parts of epoxy resin, 8 parts of dimethyl dioxirane, 10 parts of a polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether, 5 parts of benzyl alcohol, 5 parts of polypropylene glycol glycidyl ether, 5 parts of nano-alumina, 10 parts of silicon carbide, and 5 parts of silicon dioxide; Component B includes the following raw materials in parts by weight: 12 parts of diethylenetriamine and 15 parts of 3-m-phenylenediamine; The preparation method of the reinforcing bar adhesive comprises the following steps: S1. React epoxy resin and dimethyl dioxirane under the action of triethylamine at 50°C for 15 min, then heat to 80°C for 15 min, and then heat to 100°C for 15 min to obtain modified epoxy resin; S2, mixing the modified epoxy resin and the remaining raw materials of component A to obtain component A; S3, mixing the raw materials of component A and component B to obtain reinforcing bar adhesive.
[0028] Example 2 The anchor glue comprises a component A and a component B in a mass ratio of 6:1; Component A includes the following raw materials in parts by weight: 18 parts of epoxy resin, 15 parts of dimethyl dioxirane, 20 parts of a polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether, 12 parts of benzyl alcohol, 10 parts of polypropylene glycol glycidyl ether, 10 parts of nano-alumina, 15 parts of silicon carbide, and 10 parts of bentonite; Component B includes the following raw materials in parts by weight: 18 parts of triethylenetetramine and 20 parts of 3-m-phenylenediamine; The preparation method of the reinforcing bar adhesive comprises the following steps: S1. React epoxy resin and dimethyl dioxirane under the action of triethylamine at 50°C for 20 min, then heat to 80°C for 20 min, and then heat to 100°C for 20 min to obtain modified epoxy resin; S2, mixing the modified epoxy resin and the remaining raw materials of component A to obtain component A; S3, mixing the raw materials of component A and component B to obtain reinforcing bar adhesive.
[0029] Example 3 The anchor glue comprises a component A and a component B in a mass ratio of 4:1; Component A includes the following raw materials in parts by weight: 12 parts of epoxy resin, 10 parts of dimethyl dioxirane, 12 parts of a polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether, 8 parts of benzyl alcohol, 8 parts of polypropylene glycol glycidyl ether, 8 parts of nano-alumina, 12 parts of silicon carbide, and 6 parts of silicon dioxide; Component B includes the following raw materials in parts by weight: 15 parts of diethylenetriamine and 18 parts of 3-m-phenylenediamine; The preparation method of the reinforcing bar adhesive comprises the following steps: S1. React epoxy resin and dimethyl dioxirane under the action of triethanolamine at 50°C for 18 minutes, then heat to 80°C for 18 minutes, and then heat to 100°C for 18 minutes to obtain modified epoxy resin; S2, mixing the modified epoxy resin and the remaining raw materials of component A to obtain component A; S3, mixing the raw materials of component A and component B to obtain reinforcing bar adhesive.
[0030] Example 4 The only difference between this embodiment and embodiment 3 is that, in parts by weight, the polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether in the raw materials of component A is 13 parts, and the polypropylene glycol glycidyl ether is 7 parts.
[0031] Example 5 The only difference between this embodiment and embodiment 3 is that, in parts by weight, the raw materials of component A include 15 parts of the polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether and 5 parts of polypropylene glycol glycidyl ether.
[0032] Example 6 The only difference between this embodiment and embodiment 3 is that, in parts by weight, the raw materials of component A include 10 parts of the polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether and 10 parts of polypropylene glycol glycidyl ether.
[0033] Comparative Example 1 The difference between this comparative example and Example 1 is that the polymer of phenol, formaldehyde and polypropylene glycol glycidyl ether is not added.
[0034] Comparative Example 2 The difference between this comparative example and Example 1 is only that no dimethyl dioxirane is added.
[0035] Comparative Example 3 The difference between this comparative example and Example 1 is that no polypropylene glycol glycidyl ether is added.
[0036] Experimental Example 1 The splitting tensile strength test was performed on the anchoring adhesives prepared in Examples 1 to 6 and Comparative Examples 1 to 3 according to the standard GB 50728-2011 "Technical Specification for Safety Appraisal of Engineering Structure Reinforcement Materials", and the results are shown in Table 1 below.
[0037] Table 1 Performance test results
[0038] Compared with comparative examples 1 to 3 and conventional products on the market, the rebar embedding glues prepared in examples 1 to 6 have higher splitting tensile strength, which can reach above 19.81 MPa, indicating that the rebar embedding glue of the present invention has better strength.
[0039] Experimental Example 2 According to the standard GB 50728-2011 "Technical Specification for Safety Appraisal of Engineering Structure Reinforcement Materials", the anchoring glues prepared in Examples 1 to 6 and Comparative Examples 1 to 3 were tested for their applicable period at 10°C in winter. The results are shown in Table 2 below.
[0040] Table 2 Performance test results
[0041] Compared with comparative examples 1 to 3 and conventional products on the market, the anchoring glues prepared in examples 1 to 6 have a longer applicable period measured at 10°C in winter, especially the anchoring glues prepared in examples 3 to 4 have an applicable period of more than 110 minutes measured at 10°C in winter.
[0042] Experimental Example 3 According to the standard GB 50728-2011 "Technical Specification for Safety Appraisal of Engineering Structure Reinforcement Materials", the steel-to-steel tensile shear strength, thixotropic index and applicable period in spring and summer of Example 1 were tested, and the results are shown in Table 3 below.
[0043] Table 3 Performance test results
[0044] As can be seen from Table 3, compared with conventional products, the anchor glue prepared in Example 1 of the present invention has longer shear strength and application period in different seasons, better fluidity, and the raw material of component A in the anchor glue is mainly epoxy resin, and components such as polypropylene glycol glycidyl ether are added, which effectively improves the thixotropic performance of the anchor glue, and reduces the thixotropic index of commercially available conventional products from 5.0 to 4.8. This thixotropic index makes the anchor glue have less resistance when injected into the steel bar holes, achieves full infiltration of steel bars and concrete, and avoids the problem that the thixotropic index is too small, which causes the anchor glue to easily flow downward, unevenly distribute, and reduce the curing quality, and reduce the overall stability of the structure.
[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A reinforcing bar glue, characterized in that: It includes component A and component B with a mass ratio of 3 to 6:1; The component A comprises the following raw materials in parts by weight: 6-18 parts of epoxy resin, 8-15 parts of dimethyl dioxirane, 10-20 parts of a polymer of phenol, formaldehyde and glycidyl ether, 5-12 parts of a diluent, 5-10 parts of polypropylene glycol glycidyl ether, and 15-25 parts of a filler; The raw materials of the B component include a curing agent.
2. The reinforcing bar planting glue according to claim 1, characterized in that: The component A also includes the following raw materials in parts by weight: 5 to 10 parts of thixotropic agent.
3. The reinforcing bar planting glue according to claim 2, characterized in that: The thixotropic agent includes an inorganic thixotropic agent and / or an organic thixotropic agent; The inorganic thixotropic agent includes one or more of bentonite, silicon dioxide, and magnesium aluminum silicate.
4. The reinforcing bar planting glue according to claim 1, characterized in that: The epoxy resin includes hydantoin epoxy resin; the molecular weight of the hydantoin epoxy resin is 200-280.
5. The reinforcing bar planting glue according to claim 1, characterized in that: The curing agent includes aliphatic amine curing agent and aromatic amine curing agent in a mass ratio of 1:0.8-1.
7.
6. The reinforcing bar planting glue according to claim 1, characterized in that: The filler includes metal oxides and / or carbides.
7. The reinforcing bar planting glue according to claim 1, characterized in that: When the filler is metal oxide and carbide, the mass ratio of the metal oxide to the carbide is 1:1-3.
8. The reinforcing bar planting glue according to claim 1, characterized in that: The diluent includes one or more of benzyl alcohol, acetone, and ethyl acetate.
9. The method for preparing a reinforcing bar planting glue according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, reacting the epoxy resin and the dimethyl dioxirane under the action of a catalyst to obtain a modified epoxy resin; S2, mixing the modified epoxy resin and the remaining raw materials of the A component to obtain the A component; S3, mixing the raw materials of the A component and the B component to obtain the reinforcing bar adhesive.
10. The method for preparing a reinforcing bar planting glue according to claim 9, characterized in that: The reaction temperature is 50-100° C., and the reaction time is 45-60 min.