Composition for epoxy resin grouting material, epoxy resin grouting material, and preparation method and application thereof

Abstract

The present application relates to the technical field of building materials, and discloses a composition for an epoxy resin grouting material, an epoxy resin grouting material, and a preparation method and application thereof, the composition containing plant-based diols, epoxy vegetable oil, micro-nano fillers, a first curing agent, and a fatty amine in a content weight ratio of 1:4-9:5-20:1.5-5:0.5-2. 2‑4 The plant-based diols are C The first curing agent is selected from at least one of lignin, tannic acid, malic acid, chitosan, citric acid, and tartaric acid; the fatty amine is selected from at least one of ethanolamine, lauryl amine, and stearyl amine; and the micro-nano fillers have an average particle diameter of 0.1-100 microns. The epoxy resin grouting material prepared by the present application has the advantages of non-toxicity, low viscosity, high bonding strength with concrete, and strong concrete crack repair performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building materials, in particular to a composition for epoxy resin grouting material, an epoxy resin grouting material and a preparation method and application thereof. BACKGROUND

[0002] Concrete material is one of the most important and widely used building materials in modern construction and infrastructure construction. It is widely used in bridge, road, building, airport and other engineering due to its excellent mechanical properties, durability, economy and easy construction characteristics. Concrete not only can bear the designed load, but also can enhance its compressive strength, impermeability, weather resistance and seismic performance by adding different admixtures. However, cracks are difficult to avoid in concrete during long-term use due to the influence of load, temperature change, dry shrinkage, wet expansion and other factors. These cracks may affect the integrity, durability and safety of the concrete structure, especially when subjected to continuous load or exposed to harsh environments (such as freeze-thaw cycle, chemical corrosion, etc.), the expansion of cracks will cause more serious damage to the structure.

[0003] With the strict requirements of the construction industry on the performance of concrete structure, for example, in the railway industry Q / CR 802 "High-speed railway ballastless track bed damage repair" clearly stipulates that cracks exceeding 0.5mm on the ballastless track bed must be repaired using resin; and in the construction industry GB / T 50367 "Concrete structure reinforcement design specification", when the crack width of concrete is between 0.1-1.5mm, the crack repair needs to be carried out through certain repair materials, such as high-strength resin materials. This kind of resin repair material can effectively prevent the further expansion of cracks and restore the bearing capacity of the concrete structure.

[0004] Among various types of epoxy resins, bisphenol A glycidyl ether (DGEBA) derived epoxy resins are widely used due to their low cost, excellent thermal stability and outstanding substrate adhesion, accounting for more than 85% of the global consumption of epoxy resin market. However, bisphenol A (BPA) as the precursor of DGEBA, its widely concerned toxicity raises concerns about health. Bisphenol A is considered an endocrine disruptor, long-term exposure may have adverse effects on the human body. Under this background, the development of green and environmentally friendly materials without BPA has become the focus of research.

[0005] Currently, bio-based materials such as epoxy soybean oil are considered as sustainable alternatives to DGEBA, which not only can reduce the health risks brought by BPA, but also can provide good adhesion and durability.

[0006] Therefore, it is of great significance to explore a new environmentally friendly adhesive based on epoxy vegetable oil to promote the development of green building materials. SUMMARY

[0007] The present application aims to solve the problem of toxicity and harm to human health in the prior art, and provides an organic grouting material which is green, environmentally friendly and has excellent repair effect.

[0008] To achieve the above-mentioned purpose, the present application provides an epoxy resin grouting material composition, which contains plant-based diol, epoxy vegetable oil, micro-nano filler, first curing agent and fatty amine in a weight ratio of 1:4-9:5-20:1.5-5:0.5-2.

[0009] The plant-based diol is C 2-4 Plant-based diol;

[0010] The first curing agent is selected from at least one of lignin, tannic acid, malic acid, chitosan, citric acid and tartaric acid;

[0011] The fatty amine is selected from at least one of ethanolamine, laurylamine and stearylamine;

[0012] The average particle diameter of the micro-nano filler is 0.1-100 μm.

[0013] The present application provides a method for preparing an epoxy resin grouting material, which uses the components of the epoxy resin grouting material composition, and the method comprises:

[0014] (1) First stirring and mixing plant-based diol, epoxy vegetable oil and micro-nano filler for 1-3 min to obtain premix I; and,

[0015] Second stirring and mixing first curing agent and fatty amine for 1-3 min to obtain premix II;

[0016] (2) Third stirring and mixing the premix I and the premix II for 1-2 min to obtain the epoxy resin grouting material;

[0017] The epoxy resin grouting material composition is the epoxy resin grouting material composition provided in the first aspect.

[0018] The present application provides an epoxy resin grouting material prepared by the method of the second aspect.

[0019] The present application provides the application of the epoxy resin grouting material of the third aspect in concrete crack repair.

[0020] Through the above technical solution, the present application has at least the following advantages:

[0021] (1) The main raw materials of the epoxy resin grouting material composition provided by the present invention are all derived from biomass materials and industrial by-products. Compared with traditional bisphenol A glycidyl ether-based epoxy resin materials, the raw materials used in the present invention are not only environmentally friendly and harmless to the human body, but also have low cost.

[0022] (2) The epoxy resin grouting material provided by the present invention has excellent properties such as low viscosity, high bonding strength with concrete, and strong repairability of concrete cracks. Detailed Implementation

[0023] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0024] As mentioned above, the first aspect of the present invention provides a composition for epoxy resin grouting materials, the composition containing, by weight ratio, plant-based diol, epoxy vegetable oil, micro / nano filler, first curing agent, and fatty amine in the following proportions: 1:4-9:5-20:1.5-5:0.5-2.

[0025] The plant-based diol is C 2-4 Plant-based diols;

[0026] The first curing agent is selected from at least one of lignin, tannic acid, malic acid, chitosan, citric acid, and tartaric acid;

[0027] The fatty amine is selected from at least one of ethanolamine, laurylamine, and stearylamine;

[0028] The average diameter of the micro / nano filler particles is 0.1–100 μm.

[0029] Preferably, the weight ratio of the plant-based diol, the epoxy plant oil, the micro / nano filler, the first curing agent, and the fatty amine is 1:7-9:8-12:2-4:1-1.5.

[0030] More preferably, the weight ratio of the plant-based diol, the epoxy plant oil, the micro / nano filler, the first curing agent, and the fatty amine is 1:8-9:9-11:2-3:1-1.5.

[0031] Preferably, the plant-based diol is selected from at least one of 1,2-propanediol, 1,3-propanediol, and 1,4-butanediol.

[0032] Preferably, the epoxy vegetable oil is epoxy soybean oil and / or epoxy linseed oil.

[0033] Further preferably, the micro-nano filler is selected from at least one of fly ash, slag powder, steel slag powder, coal gangue powder, and gasification slag powder.

[0034] More preferably, the average diameter of the particles of the micro-nano filler is 0.1-20 μm.

[0035] According to a preferred embodiment of the present application, the micro-nano filler is gasification slag powder.

[0036] Preferably, the gasification slag powder contains 40-60 wt% of SiO2, 10-30 wt% of CaO, and 10-30 wt% of Al2O3, based on the total mass of the gasification slag powder. The inventors of the present application have found that, in this preferred embodiment, the grouting material obtained has better compactness and repairing effect.

[0037] In the present application, the micro-nano filler can be sieved to obtain micro-nano fillers of different diameters according to actual needs and by using conventional techniques in the art.

[0038] As described above, the second aspect of the present application provides a method for preparing an epoxy resin grouting material, using the components of the epoxy resin grouting material composition, which comprises:

[0039] (1) first stirring and mixing the plant-based diol, the epoxy vegetable oil, and the micro-nano filler for 1-3 min to obtain a premix I; and,

[0040] second stirring and mixing the first curing agent and the aliphatic amine for 1-3 min to obtain a premix II;

[0041] (2) third stirring and mixing the premix I and the premix II for 1-2 min to obtain the epoxy resin grouting material;

[0042] The epoxy resin grouting material composition is the epoxy resin grouting material composition provided in the first aspect.

[0043] The present application does not have special requirements for the stirring rate of the above-mentioned first stirring and mixing and second stirring and mixing. Those skilled in the art can select a suitable stirring rate according to specific needs, so that the components are fully mixed and uniform.

[0044] Preferably, the third stirring and mixing is further under the conditions of a temperature of 5-35℃ and a stirring rate of 300-3000 r / min. The inventors of the present application have found that, in this preferred case, the obtained epoxy resin grouting material has better bonding performance.

[0045] The third aspect of the present application provides an epoxy resin grouting material prepared by the method of the second aspect.

[0046] The fourth aspect of the present application provides an application of the epoxy resin grouting material of the third aspect in repairing concrete cracks.

[0047] The present application will be described in detail by way of examples. In the following examples, the raw materials and instruments involved are commercially available unless otherwise specified, and the specific sources of raw materials and instruments are shown as follows:

[0048] Epoxy soybean oil: purchased from Shanghai Yuanfan Biotechnology Co., Ltd.;

[0049] Epoxy linseed oil: purchased from Henan Tianfu Chemical Co., Ltd.;

[0050] Fly ash: the average particle diameter is 12.5 μm, purchased from Hunan Changde Power Generation Co., Ltd.;

[0051] Gasification slag powder I: the average particle diameter is 11.7 μm;

[0052] Gasification slag powder II: the average particle diameter is 34.4 μm;

[0053] Gasification slag powder III: the average particle diameter is 138.5 μm;

[0054] The gasification slag powder I, gasification slag powder II and gasification slag powder III described above are all purchased from Ningxia Coal Group Co., Ltd., and exemplarily, the composition thereof is that the content of SiO2 is 47.78 wt%, the content of CaO is 16.15 wt%, and the content of Al2O3 is 13.63 wt%;

[0055] 1,2-propanediol, 1,3-propanediol, tannic acid, laurylamine, ethanolamine are all purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0056] Malic acid: purchased from Shanghai Maikelin Biochemical Technology Co., Ltd.;

[0057] Digital rotary viscometer: model NDJ-9S, purchased from Shanghai Lichengbangxi Instrument Technology Co., Ltd.

[0058] Example 1

[0059] (1) The epoxy soybean oil, 1,2-propanediol and gasification slag powder I are first stirred and mixed for 3 min to obtain a premix I; the tannic acid and laurylamine are secondly stirred and mixed for 3 min to obtain a premix II;

[0060] (2) The premix I and the premix II are stirred and mixed at 35°C and 2000 r / min for 2 min to obtain the epoxy resin grouting material A1.

[0061] The remaining examples are carried out according to the method of Example 1, except that the types, amounts and process parameters of the components applied are not the same, and specific reference is made to the cases listed in Table 1. Among them, the amount of each component is expressed as 10 g per weight part.

[0062] Table 1

[0063]

[0064]

[0065] Test Example

[0066] Viscosity determination: The viscosity of the obtained epoxy resin grouting material is determined by using an NDJ-9S digital rotary viscometer according to standard DIN EN ISO 2555:2018-09, and the result is the average value of six measurements. The specific results are shown in Table 2.

[0067] Bonding and bending strength test: The 100 mm long x 100 mm wide x 400 mm high cement mortar sample maintained for 28 days is cut by a machine tool, the two cement mortar samples after cutting are placed with a 1 mm interval to simulate a crack, and the two sides (the two sides perpendicular to the ground) of the two cement mortar samples after cutting with a 1 mm interval are sealed with an aluminum tape to leave a grouting opening on the upper surface. The epoxy resin grouting material prepared above is poured into the crack, and after the epoxy resin grouting material is poured for 7 days, the tape is removed and cut to obtain a cutting sample S, ensuring that the epoxy resin grouting material in the cutting sample S is sandwiched by the cement mortar, and the size of the cutting sample S is 40 mm long x 40 mm wide x 160 mm high. After the cutting sample S is placed at room temperature for 24 h, the bonding and bending strength test is carried out at a loading speed of 50 N / s. Each group of tests is carried out three times, and the average value of the bonding and bending strength results of the three times is taken as the result. The specific results are shown in Table 2.

[0068] Table 2

[0069]

[0070] As can be seen from the results in Table 2, the epoxy resin grouting material prepared by the present application has the excellent properties of low viscosity, high bonding strength with concrete and strong concrete crack repairability.

[0071] The preferred embodiments of the present application are described in detail above, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including that each technical feature is combined in any other suitable manner. These simple modifications and combinations should also be considered as disclosed by the present application and fall within the protection scope of the present application.

Claims

1. A composition for epoxy resin grouting material, characterized in that, The composition contains plant-based glycols, epoxy vegetable oils, micro / nano fillers, a first curing agent, and fatty amines in a weight ratio of 1:4-9:5-20:1.5-5:0.5-2. The plant-based diol is C. 2-4 Plant-based diols; The first curing agent is selected from at least one of lignin, tannic acid, malic acid, chitosan, citric acid, and tartaric acid; The fatty amine is selected from at least one of ethanolamine, laurylamine, and stearylamine; The micro / nano filler is selected from at least one of fly ash, slag powder, steel slag powder, coal gangue powder, and gasification slag powder, and the average particle diameter of the micro / nano filler is 0.1~20μm.

2. The composition according to claim 1, wherein, The weight ratio of the plant-based diol, the epoxy plant oil, the micro / nano filler, the first curing agent, and the fatty amine is 1:7-9:8-12:2-4:1-1.

5.

3. The composition according to claim 1 or 2, wherein, The plant-based diol is selected from at least one of 1,2-propanediol, 1,3-propanediol, and 1,4-butanediol.

4. The composition according to claim 1 or 2, wherein, The epoxidized vegetable oil is epoxidized soybean oil and / or epoxidized linseed oil.

5. A method for preparing epoxy resin grouting material, characterized in that, The method involves applying the components of a composition for epoxy resin grouting materials, and includes: (1) The plant-based glycol, epoxidized vegetable oil, and micro / nano filler are first stirred and mixed for 1-3 minutes to obtain premix I; and, The first curing agent and the fatty amine are mixed for 1-3 minutes to obtain premix II; (2) Mix the premix I and the premix II for a third time for 1-2 minutes to obtain epoxy resin grouting material; The epoxy resin grouting material composition is the epoxy resin grouting material composition according to any one of claims 1-4.

6. The method according to claim 5, wherein, The third mixing conditions also include: a temperature of 5-35℃ and a mixing speed of 300-3000 r / min.

7. An epoxy resin grouting material prepared by the method of claim 5 or 6.

8. The application of the epoxy resin grouting material according to claim 7 in the repair of concrete cracks.

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