High belite sulphoaluminate cement-based two-component grouting material and preparation method thereof

Abstract

The invention discloses a high belite sulphoaluminate cement-based two-component grouting material and a preparation method thereof. The grouting material comprises a gelling component and a coagulating reinforcing component, wherein the gelling component is prepared from a high belite sulphoaluminate cement clinker and an additive A; the admixture A comprises a water reducing agent, a retarder and slow-release minerals; the coagulating and reinforcing component comprises ordinary Portland cement clinker, calcium hydroxide, gypsum and an additive B; the admixture B comprises a water reducing agent and an early strength agent. According to the high belite sulphoaluminate cement-based grouting material, the formula composition of the high belite sulphoaluminate cement-based grouting material is optimized, so that the hydration process of the high belite sulphoaluminate cement is more continuous and lasting, and the compressive strength of the obtained high belite sulphoaluminate cement-based grouting material can be continuously improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cement-based grouting materials, and particularly relates to a high belite sulphoaluminate cement-based two-component grouting material and a preparation method thereof. BACKGROUND

[0002] At present, in the field of grouting reinforcement, cement-based reinforcement materials can be divided into Portland cement-based, sulphoaluminate cement-based, aluminate cement-based and phosphate cement-based materials. Among them, the sulphoaluminate cement-based grouting material has better performance and lower cost, and thus becomes the most widely used cement-based grouting material. However, the sulphoaluminate cement has the problems of too short setting time, difficulty in construction, difficulty in increasing late strength, and even the problem of strength reduction, which is difficult to meet the requirement of increasing late hydration strength. Therefore, how to ensure the stable development of the late strength of the sulphoaluminate cement has become a problem to be solved.

[0003] The high belite sulphoaluminate cement is a new type of cement which can effectively solve the above problems. Compared with the traditional sulphoaluminate cement, the high belite sulphoaluminate cement has a lower C4A3S and a higher C2S mineral proportion, and the alumina content in the clinker is low, so that a lower grade bauxite can be used as the alumina raw material, the utilization rate of raw materials is improved, and the production cost is reduced. Compared with the Portland cement clinker, the high belite sulphoaluminate cement clinker has lower CO2 emission in the production process. In addition, the high belite sulphoaluminate cement can maintain the high early strength of the ordinary sulphoaluminate cement and ensure the stable late strength growth of the clinker. Therefore, the high belite sulphoaluminate cement clinker can quickly stand out from the sulphoaluminate cement clinker.

[0004] However, most of the high belite sulphoaluminate cement cannot meet the requirement of increasing the mid-late strength at present, especially the solidified body formed by the grouting material composed of the high belite sulphoaluminate cement clinker will have the phenomenon of compressive strength reduction when cured for 7 days to 28 days, and the reduction rate is from 20% to 50% according to different proportions. This is mainly because the high belite sulphoaluminate cement cannot continuously hydrate, so it cannot fill the void formed by the conversion of high-sulfur type hydrated calcium sulphoaluminate to single-sulfur hydrated calcium sulphoaluminate, thereby reducing the compressive strength.

[0005] Therefore, the application is proposed. SUMMARY

[0006] The present application aims to at least solve one of the problems in the related art. To this end, the present application provides a high belite sulphoaluminate cement-based double-component grouting material and a preparation method thereof, which aims to continuously hydrate the high belite sulphoaluminate cement by introducing new mineral phases, avoid the phenomenon of strength reduction, and ensure that the compressive performance of the obtained grouting material can be continuously improved.

[0007] In one aspect, the present application provides a high belite sulphoaluminate cement-based double-component grouting material, which comprises a cementitious component and a coagulation and reinforcement component. The cementitious component comprises high belite sulphoaluminate cement clinker and additive A; the additive A comprises water reducing agent, retarder and slow-release mineral. The coagulation and reinforcement component comprises ordinary Portland cement clinker, calcium hydroxide, gypsum and additive B; the additive B comprises water reducing agent and early strength agent.

[0008] The present application introduces minerals that can participate in the hydration of high belite sulphoaluminate cement, and at the same time introduces additives to coordinate the hydration process of cement and minerals, so that the hydration of the two can be continuous, thereby enabling the strength of the double-component grouting material to continuously develop and not to be reduced. Specifically, the retarder is used to control the activity of high belite sulphoaluminate cement clinker and slow-release mineral, and to compress the time interval of performance development of the two, so that they can be continuously hydrated. The ordinary Portland cement clinker is used to supplement the interval in the hydration process of high belite sulphoaluminate cement clinker and slow-release mineral, so that the hydration process is more continuous and persistent. On this basis, the early strength agent component is introduced to stimulate the hydration activity of ordinary Portland cement clinker, so that the hydration process of the former two is more compact, thereby achieving the purpose of relying on high belite sulphoaluminate cement for the development of early strength, relying on slow-release mineral and ordinary Portland cement clinker for the development of mid-term strength, and relying on high belite sulphoaluminate cement and ordinary Portland cement for the development of late strength.

[0009] In some embodiments, the mass ratio of the cementitious component to the coagulation and reinforcement component is (0.8-1.2):1.

[0010] In some embodiments, the content of aluminum oxide in the high belite sulphoaluminate cement clinker is not less than 32%.

[0011] In some embodiments, the water reducing agent in the additive A comprises any two or more combinations of polycarboxylic acid water reducing agent, melamine water reducing agent, lignin sulfonate water reducing agent, naphthalene sulfonate water reducing agent, fatty acid-based high-efficiency water reducing agent, potassium chloride and ammonium chloride; And / or, the retarder comprises at least one of sodium citrate, borax, boric acid, tartaric acid and sodium gluconate; And / or, the slow-release mineral includes at least one of calcined kaolin, calcined bauxite, aluminum magnesium spinel, heavy-burned magnesia, and alumina.

[0012] In some embodiments, the amount of the water reducing agent in the additive A is 0.1% to 1% of the mass of the high belite sulphoaluminate cement clinker. And / or, the amount of the retarder is 0.2% to 3% of the mass of the high belite sulphoaluminate cement clinker. And / or, the amount of the slow-release mineral is 1% to 6% of the mass of the high belite sulphoaluminate cement clinker.

[0013] In some embodiments, the fineness of the ordinary portland cement clinker is not less than 400 mesh. And / or, the amount of the ordinary portland cement clinker accounts for 50% to 84% of the mass of the accelerating and reinforcing component.

[0014] In some embodiments, the purity of the calcium hydroxide is not less than 95%, and the fineness is not less than 400 mesh. And / or, the amount of the calcium hydroxide accounts for 5% to 20% of the mass of the accelerating and reinforcing component.

[0015] In some embodiments, the gypsum includes at least one of anhydrous gypsum and dihydrate gypsum. And / or, the amount of the gypsum accounts for 10% to 25% of the mass of the accelerating and reinforcing component.

[0016] In some embodiments, the water reducing agent in the additive B includes any two or more combinations of polycarboxylic acid water reducing agent, melamine water reducing agent, lignin sulfonate water reducing agent, naphthalene sulfonate water reducing agent, fatty acid-based superplasticizer, potassium chloride, and ammonium chloride. And / or, the amount of the water reducing agent in the additive B is 0.5% to 2% of the mass of the high belite sulphoaluminate cement clinker.

[0017] In some embodiments, the early strength agent includes at least one of calcium chloride, triethanolamine, triisopropanolamine, sodium chloride, and potassium chloride. And / or, the amount of the early strength agent is not higher than 0.5% of the mass of the silicate cement clinker.

[0018] Another aspect of the embodiments of the present application further provides a preparation method of the high belite sulphoaluminate cement-based two-component grouting material, including the following steps: (1) mixing the high belite sulphoaluminate cement clinker, the water reducing agent, the retarder, and the slow-release mineral in proportion to obtain a cementitious component; (2) mixing ordinary portland cement clinker, calcium hydroxide, gypsum and water reducing agent, early strength agent by proportion to obtain a coagulation and reinforcement component; (3) in use, the cementitious component and the coagulation and reinforcement component are respectively stirred with water, and the two obtained grouting liquids are mixed at the mouth of a grouting gun to obtain the high belite sulphoaluminate cement-based two-component grouting material.

[0019] In some embodiments, in the step (1) and / or the step (2), the stirring time is not less than 30 min, and the stirring rate is not less than 300 r / min.

[0020] The features and advantages described above for the high belite sulphoaluminate cement-based two-component grouting material also apply to the preparation method of the high belite sulphoaluminate cement-based two-component grouting material, and will not be repeated here. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort fall within the protection scope of the present application.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present application shall have the meanings commonly understood by a person of ordinary skill in the art to which the present application belongs.

[0023] In the present application, in the case where a value is described as a range, it should be understood that such disclosure includes the disclosure of all possible sub-ranges within the range and the specific values falling within the range, regardless of whether the specific values or specific sub-ranges are explicitly indicated.

[0024] In the present application, the words “comprise” and “include” and their various variants mean that other elements or integers not specifically described can be included.

[0025] In the present application, the term “and / or” merely means a descriptive association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that there are three cases of A alone, A and B together, and B alone.

[0026] The embodiment of the present application proposes a high belite sulphoaluminate cement-based two-component grouting material, which comprises a cementitious component and a coagulation and reinforcement component; The cementitious component comprises high belite sulphoaluminate cement clinker and an additive A; the additive A comprises a water reducing agent, a retarder and a slow-release mineral. The accelerating and reinforcing component comprises ordinary Portland cement clinker, calcium hydroxide, gypsum and additive B; the additive B comprises water reducing agent and early strength agent.

[0027] In some embodiments, the mass ratio of the cementitious component to the accelerating and reinforcing component is (0.8-1.2):1.

[0028] In some embodiments, the content of aluminum oxide in the high-Berlith sulfate aluminate cement clinker is not less than 32%. By selecting high-Berlith sulfate aluminate cement clinker to prepare the grouting material, the raw material is easy to obtain, commonly available on the market, and low in price, which can greatly reduce the production cost of the grouting material.

[0029] In some embodiments, the water reducing agent in the additive A comprises any two or more combinations of polycarboxylic acid water reducing agent, melamine water reducing agent, lignin sulfonate water reducing agent, naphthalene sulfonate water reducing agent, fatty acid-based high-efficiency water reducing agent, potassium chloride and ammonium chloride; by selecting multiple water reducing agents for compounding, the effect of "1+1>2" can be achieved. And / or, the retarder comprises at least one of sodium citrate, borax, boric acid, tartaric acid and sodium gluconate; by adding a retarder to the grouting system, the hydration of the single component can be inhibited, so that the grouting material maintains good fluidity.

[0030] And / or, the slow-release mineral comprises at least one of calcined kaolin, calcined bauxite, aluminum magnesium spinel, heavy-burned magnesium oxide and aluminum oxide; when the slow-release mineral is aluminum oxide, the purity of the aluminum oxide should be not less than 95% and the fineness is 400-1250 meshes; when the slow-release mineral is a mixture of calcined bauxite and aluminum magnesium spinel, the bauxite is calcined at 1000°C in an anaerobic environment and the calcination time is not less than 2h; and the fineness of the aluminum magnesium spinel is 400-1250 meshes; and when the slow-release mineral is heavy-burned magnesium oxide, the calcination temperature of the heavy-burned magnesium oxide is not less than 1600°C and the fineness is 600-1200 meshes.

[0031] In some embodiments, the amount of the water reducing agent in the additive A is 0.1%-1% of the mass of the high-Berlith sulfate aluminate cement clinker; And / or, the amount of the retarder is 0.2%-3% of the mass of the high-Berlith sulfate aluminate cement clinker; And / or, the amount of the slow-release mineral is 1%-6% of the mass of the high-Berlith sulfate aluminate cement clinker.

[0032] In some embodiments, the fineness of the ordinary Portland cement clinker is not less than 400 meshes; And / or, the amount of the ordinary silicate cement clinker accounts for 50% to 84% of the mass of the accelerating and reinforcing component.

[0033] In some embodiments, the calcium hydroxide has a purity of not less than 95% and a fineness of not less than 400 mesh; And / or, the amount of calcium hydroxide used accounts for 5% to 20% of the mass of the coagulating and reinforcing component.

[0034] Adding calcium hydroxide to the grouting material is beneficial for increasing its hourly strength. Furthermore, the inventors have found that excessive calcium hydroxide addition can lead to flash-setting during the curing process, thus reducing the grouting material's injectability; conversely, insufficient calcium hydroxide addition results in excessively long setting times and low hourly performance. Therefore, in this embodiment of the invention, controlling the amount of calcium hydroxide added to be 5% to 20% of the mass of the setting-promoting and reinforcing component is advantageous.

[0035] In some embodiments, the gypsum includes at least one of anhydrous gypsum and dihydrate gypsum; And / or, the amount of gypsum used accounts for 10% to 25% of the mass of the coagulating and reinforcing component.

[0036] In some embodiments, the water-reducing agent in the admixture B includes any two or more combinations of polycarboxylate water-reducing agent, melamine water-reducing agent, lignin sulfonate water-reducing agent, naphthalene sulfonate water-reducing agent, fatty acid-based high-efficiency water-reducing agent, potassium chloride, and ammonium chloride. And / or, the amount of the water-reducing agent in admixture B is 0.5% to 2% of the mass of the high belite sulfoaluminate cement clinker.

[0037] In some embodiments, the early strength agent includes at least one of calcium chloride, triethanolamine, triisopropanolamine, sodium chloride, and potassium chloride; And / or, the amount of the early strength agent used is not higher than 0.5% of the mass of the silicate cement clinker.

[0038] Another aspect of this invention provides a method for preparing the above-mentioned high-belite sulfoaluminate cement-based two-component grouting material, comprising the following steps: (1) Mix high belite sulfoaluminate cement clinker with water-reducing agent, retarder and slow-release mineral in proportion to obtain cementitious components; (2) Mix ordinary silicate cement clinker, calcium hydroxide, gypsum, water-reducing agent, and early-strength agent in proportion to obtain the accelerating and reinforcing component; (3) When using, the gelling component and the coagulating and reinforcing component are respectively added to water and stirred. The two grouting liquids are mixed at the grouting gun nozzle, which is the high belite sulfoaluminate cement-based two-component grouting material.

[0039] In some embodiments, in step (1) and / or step (2), the mixing time is not less than 30 min and the mixing rate is not less than 300 r / min.

[0040] It should be noted that in step (3) above, the time for adding water and stirring should not be less than 3 minutes; and the amount of water added is not subject to any special restrictions, but is determined by the technicians according to the needs of the construction site, usually 0.25 to 0.5 times the mass of the powder.

[0041] The following are non-limiting embodiments and comparative examples of the present invention. It should be noted that the schemes in the comparative examples are not prior art, but are only set up for comparison with the schemes in the embodiments, and are not intended to limit the present invention. Unless otherwise stated, all raw materials used in the embodiments and comparative examples are conventional commercially available products, or can be prepared by known methods.

[0042] Example 1 This embodiment provides a high-belite sulfoaluminate cement-based two-component grouting material, comprising the following components in parts by weight: gelling components: 100 parts of high belite sulfoaluminate cement clinker, 0.2 parts of polycarboxylate superplasticizer, 0.1 parts of ammonium chloride, 1.5 parts of borax, 0.3 parts of sodium gluconate, 3 parts of alumina (600 mesh), and 1 part of aluminum-magnesium spinel powder (1000 mesh); Coagulation-promoting and reinforcing components: 68 parts of ordinary silicate cement clinker (600 mesh), 10 parts of calcium hydroxide, 22 parts of gypsum dihydrate, 0.4 parts of melamine water-reducing agent, 0.4 parts of naphthalene sulfonate water-reducing agent, 0.1 parts of potassium chloride, 0.1 parts of calcium chloride, and 0.02 parts of triethanolamine.

[0043] This embodiment also provides a method for preparing the above-mentioned high-belite sulfoaluminate cement-based two-component grouting material, including the following steps: (1) According to the above mass fractions, the high belite sulfoaluminate cement clinker, polycarboxylate superplasticizer, ammonium chloride, borax, sodium gluconate, alumina and aluminum magnesium spinel powder are mixed at a stirring rate of 500 r / min for 60 min to obtain the cementitious components. (2) According to the above mass fractions, ordinary silicate cement clinker, calcium hydroxide, gypsum dihydrate, melamine water-reducing agent, naphthalene sulfonate water-reducing agent, potassium chloride, calcium chloride and triethanolamine are mixed at a stirring rate of 500 r / min for 60 min to obtain the accelerating and reinforcing component. (3) Add water to the gelling component and the coagulating and reinforcing component obtained above and stir for 5 minutes. Then mix the two grouting liquids to obtain the high belite sulfoaluminate cement-based two-component grouting material.

[0044] Example 2 This embodiment provides a high-belite sulfoaluminate cement-based two-component grouting material, comprising the following components in parts by weight: gelling components: 100 parts of high-belite sulfoaluminate cement clinker, 0.5 parts of melamine water-reducing agent, 0.5 parts of naphthalene sulfonate water-reducing agent, 0.3 parts of sodium citrate, and 6 parts of aluminum-magnesium spinel powder (600 mesh); Coagulation-promoting and reinforcing components: 55 parts ordinary silicate cement clinker, 20 parts calcium hydroxide, 25 parts anhydrous gypsum, 0.5 parts polycarboxylate superplasticizer, 0.3 parts ammonium chloride, and 0.005 parts sodium chloride.

[0045] This embodiment also provides a method for preparing the above-mentioned high-belite sulfoaluminate cement-based two-component grouting material, including the following steps: (1) According to the above mass fractions, the high belite sulfoaluminate cement clinker, melamine water-reducing agent, naphthalene sulfonate water-reducing agent, sodium citrate, and aluminum magnesium spinel powder are mixed at a stirring rate of 500 r / min for 60 min to obtain the cementitious component. (2) According to the above mass fractions, ordinary silicate cement clinker, calcium hydroxide, anhydrous gypsum, polycarboxylate superplasticizer, ammonium chloride and sodium chloride are mixed at a stirring rate of 500 r / min for 60 min to obtain the accelerating and reinforcing component; (3) Add water to the gelling component and the coagulating and reinforcing component obtained above and stir for 5 minutes. Then mix the two grouting liquids to obtain the high belite sulfoaluminate cement-based two-component grouting material.

[0046] Example 3 This embodiment provides a high-belite sulfoaluminate cement-based two-component grouting material, comprising the following components in parts by weight: gelling components: 100 parts of high belite sulfoaluminate cement clinker, 0.4 parts of polycarboxylate superplasticizer, 0.1 parts of tartaric acid, 1 part of borax, and 5 parts of deburned magnesium oxide powder (800 mesh); Coagulation-promoting and reinforcing components: The mixture contains 69 parts of ordinary silicate cement clinker, 6 parts of calcium hydroxide, 25 parts of gypsum dihydrate, 0.3 parts of lignin sulfonate water-reducing agent, 0.3 parts of ammonium chloride, and 0.03 parts of potassium chloride.

[0047] This embodiment also provides a method for preparing the above-mentioned high-belite sulfoaluminate cement-based two-component grouting material, including the following steps: (1) According to the above mass fractions, the high belite sulfoaluminate cement clinker, polycarboxylate superplasticizer, tartaric acid, borax, and calcined magnesium oxide powder are mixed at a stirring rate of 500 r / min for 60 min to obtain the cementitious components. (2) According to the above mass fractions, ordinary silicate cement clinker, calcium hydroxide, gypsum dihydrate, lignosulfonate water-reducing agent and ammonium chloride are mixed at a stirring rate of 500 r / min for 60 min to obtain the accelerating and reinforcing component; (3) Add water to the gelling component and the coagulating and reinforcing component obtained above and stir for 5 minutes. Then mix the two grouting liquids to obtain the high belite sulfoaluminate cement-based two-component grouting material.

[0048] Example 4 This embodiment provides a high-belite sulfoaluminate cement-based two-component grouting material, comprising the following components in parts by weight: gelling components: 100 parts of high-belite sulfoaluminate cement clinker, 1 part of fatty acid-based high-efficiency water-reducing agent, 3 parts of borax, 4 parts of alumina (1250 mesh), and 1 part of calcined bauxite powder (600 mesh); Coagulation-promoting and reinforcing components: The ingredients are: 62 parts ordinary silicate cement clinker, 18 parts calcium hydroxide, 20 parts anhydrous gypsum, 0.3 parts fatty acid-based high-efficiency water-reducing agent, 0.5 parts polycarboxylate water-reducing agent, 0.3 parts potassium chloride, and 0.12 parts calcium chloride.

[0049] This embodiment also provides a method for preparing the above-mentioned high-belite sulfoaluminate cement-based two-component grouting material, including the following steps: (1) According to the above mass fractions, the high belite sulfoaluminate cement clinker, fatty acid-based high-efficiency water-reducing agent, borax, alumina, and calcined bauxite powder are mixed at a stirring rate of 500 r / min for 60 min to obtain the cementitious components. (2) According to the above mass fractions, ordinary silicate cement clinker, calcium hydroxide, anhydrous gypsum, fatty acid-based high-efficiency water-reducing agent, polycarboxylate water-reducing agent, potassium chloride, and calcium chloride are mixed at a stirring rate of 500 r / min for 60 min to obtain the accelerating and reinforcing component. (3) Add water to the gelling component and the coagulating and reinforcing component obtained above and stir for 5 minutes. Then mix the two grouting liquids to obtain the high belite sulfoaluminate cement-based two-component grouting material.

[0050] Comparative Example 1 This comparative example provides a high belite sulfoaluminate cement-based grouting material, comprising the following components in parts by weight: 100 parts of high belite sulfoaluminate cement clinker, 6 parts of calcium hydroxide, and 25 parts of gypsum dihydrate.

[0051] This comparative example also provides a method for preparing the above-mentioned high-belite sulfoaluminate cement-based two-component grouting material, including the following steps: According to the above-mentioned mass proportions, high belite sulfoaluminate cement clinker, calcium hydroxide, and gypsum dihydrate are mixed at a stirring rate of 500 r / min for 60 min to obtain high belite sulfoaluminate cement-based grouting material.

[0052] Comparative Example 2 This comparative example is basically the same as Example 1, except that calcium hydroxide was not added to the setting-promoting and reinforcing component of the high-belite sulfoaluminate cement-based two-component grouting material in this comparative example.

[0053] According to relevant cement testing standards, the compressive strength of the grouting materials prepared in the above embodiments and comparative examples was tested at different ages, and the results are shown in Table 1.

[0054] Table 1

[0055] As can be seen from Table 1, compared with Comparative Examples 1 and 2, the two-component grouting material prepared in the embodiments of the present invention can achieve continuous improvement in compressive strength and higher strength in the later stage.

[0056] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-belite sulfoaluminate cement-based two-component grouting material, characterized in that, Includes gelling components and coagulating and reinforcing components; The cementitious components include high-belite sulfoaluminate cement clinker and admixture A; admixture A includes water-reducing agent, retarder, and slow-release minerals. The accelerating and reinforcing components include ordinary silicate cement clinker, calcium hydroxide, gypsum, and admixture B; admixture B includes water-reducing agent and early-strength agent.

2. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The mass ratio of the gelling component to the coagulating and reinforcing component is (0.8~1.2):1; And / or, the alumina content in the high belite sulfoaluminate cement clinker is not less than 32%.

3. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The water-reducing agent in admixture A includes any two or more combinations of polycarboxylate water-reducing agent, melamine water-reducing agent, lignin sulfonate water-reducing agent, naphthalene sulfonate water-reducing agent, fatty acid-based high-efficiency water-reducing agent, potassium chloride, and ammonium chloride. And / or, the retarder includes at least one of sodium citrate, borax, boric acid, tartaric acid, and sodium gluconate; And / or, the slow-release mineral includes at least one of calcined kaolin, calcined bauxite, aluminum magnesium spinel, recalcined magnesium oxide, and aluminum oxide.

4. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1 or 3, characterized in that, The amount of water-reducing agent in admixture A is 0.1% to 1% of the mass of the high-belite sulfoaluminate cement clinker; And / or, the amount of the retarder is 0.2% to 3% of the mass of the high belite sulfoaluminate cement clinker; And / or, the amount of the slow-release mineral is 1% to 6% of the mass of the high belite sulfoaluminate cement clinker.

5. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The fineness of the ordinary silicate cement clinker is not less than 400 mesh; And / or, the amount of the ordinary silicate cement clinker accounts for 50% to 84% of the mass of the accelerating and reinforcing component.

6. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The purity of the calcium hydroxide is not less than 95%, and the fineness is not less than 400 mesh; And / or, the amount of calcium hydroxide used accounts for 5% to 20% of the mass of the coagulating and reinforcing component.

7. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The gypsum includes at least one of anhydrous gypsum and dihydrate gypsum; And / or, the amount of gypsum used accounts for 10% to 25% of the mass of the coagulating and reinforcing component.

8. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The water-reducing agent in the admixture B includes any two or more combinations of polycarboxylate water-reducing agent, melamine water-reducing agent, lignin sulfonate water-reducing agent, naphthalene sulfonate water-reducing agent, fatty acid-based high-efficiency water-reducing agent, potassium chloride, and ammonium chloride. And / or, the amount of the water-reducing agent in admixture B is 0.5% to 2% of the mass of the high belite sulfoaluminate cement clinker.

9. The high-belite sulfoaluminate cement-based two-component grouting material according to claim 1, characterized in that, The early strength agent includes at least one of calcium chloride, triethanolamine, triisopropanolamine, sodium chloride, and potassium chloride; And / or, the amount of the early strength agent used is not higher than 0.5% of the mass of the silicate cement clinker.

10. A method for preparing a high-belite sulfoaluminate cement-based two-component grouting material as described in any one of claims 1-9, characterized in that, Includes the following steps: (1) Mix high belite sulfoaluminate cement clinker with water-reducing agent, retarder and slow-release mineral in proportion to obtain cementitious components; (2) Mix ordinary silicate cement clinker, calcium hydroxide, gypsum, water-reducing agent, and early-strength agent in proportion to obtain the accelerating and reinforcing component; (3) When using, the gelling component and the coagulating and reinforcing component are respectively added to water and stirred. The two grouting liquids are mixed at the grouting gun nozzle, which is the high belite sulfoaluminate cement-based two-component grouting material.

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