A high-carbonization-resistance type ultra-sulfate cement material, a preparation method and application thereof

Abstract

This invention relates to the field of cement materials technology, specifically disclosing a high carbonation-resistant hypersulfate cement material and its preparation method and application. The material comprises the following components: 50-70 parts by weight of slag powder, 10-20 parts by weight of sulfate activator, 15-25 parts by weight of calcium sulfosilicate, 1-5 parts by weight of lithium-based alkaline silicate, and 0.2-0.8 parts by weight of benzyltrimethylammonium hydroxide. The preparation method comprises: (1) mixing the slag powder, sulfate activator, calcium sulfosilicate, and lithium-based alkaline silicate to obtain a powder. (2) mixing the benzyltrimethylammonium hydroxide with mixing water to obtain a benzyltrimethylammonium hydroxide solution. (3) mixing the benzyltrimethylammonium hydroxide solution with the powder to obtain the final product. This invention utilizes the constructed quaternary ammonium base-lithium-based alkaline silicate composite alkaline activation system in synergy with calcium sulfosilicate, which not only improves the carbonation resistance of hypersulfate cement but also improves the mechanical properties of the cement.

Description

Technical Field

[0001] This invention relates to the field of cement materials technology, specifically to a high carbonation-resistant supersulfate cement material, its preparation method, and its application. Background Technology

[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Supersulfate cement is a low-carbon cement system composed primarily of granulated blast furnace slag, using gypsum as a sulfate activator, and supplemented with small amounts of alkaline activators (including lime, cement clinker, etc.). Its preparation requires no limestone or high-temperature calcination, and its carbon emissions are only 25-30% of those of silicate cement. Furthermore, it can consume large quantities of industrial solid waste. Therefore, supersulfate cement is a typical green, low-carbon, energy-saving, and environmentally friendly material.

[0004] However, persulfate cement has an inherent drawback in practical applications: poor resistance to carbonation. This is primarily because the hydration products of persulfate cement are mainly ettringite (AFt) and a small amount of C-(A)-SH gel; no Ca(OH)2 is generated during hydration, resulting in a low alkalinity in the hydration system, making it difficult to effectively resist carbon dioxide attack. Furthermore, its main hydration product, ettringite, is prone to carbonation and decomposition in a carbon dioxide environment, generating calcium carbonate, alumina gel, and dihydrate gypsum, which in turn leads to structural deterioration, reduced strength, and decreased durability of cement concrete. This problem severely restricts the widespread application of persulfate cement in concrete structures. Therefore, improving the carbonation resistance of persulfate cement is of great significance.

[0005] Currently, regarding the poor carbonation resistance of persulfate cement, some improvement schemes have been proposed in existing technologies, including: (1) slowing down the diffusion rate of carbon dioxide through physical densification methods; (2) adding auxiliary cementitious materials such as fly ash and nano-silica to reduce the porosity of the hardened body; and (3) optimizing traditional inorganic alkaline activators (such as carbide slag and sodium hydroxide) to improve the degree of hydration and matrix density. However, such physical barrier methods can only slow down the carbonation process. As the AFt on the surface of the persulfate cement concrete structure is continuously carbonized and the porosity continues to increase, the AFt inside will also be continuously carbonized under the penetration of carbon dioxide. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a highly carbonation-resistant hypersulfate cement material, its preparation method, and its application. It utilizes a constructed quaternary ammonium alkali-lithium-based alkaline silicate composite alkaline activation system in synergy with calcium sulfosilicate, which not only improves the carbonation resistance of hypersulfate cement but also enhances its mechanical properties. Specifically, the technical solution of this invention is as follows.

[0007] First, this invention discloses a high carbonation-resistant supersulfate cement material, comprising the following components in the following proportions: 50-70 parts by weight of slag powder, 10-20 parts by weight of sulfate activator, 15-25 parts by weight of calcium sulfosilicate, 1-5 parts by weight of lithium-based alkaline silicate, and 0.2-0.8 parts by weight of benzyltrimethylammonium hydroxide.

[0008] Furthermore, the sulfate activator includes at least one of the following: gypsum dihydrate, desulfurized gypsum, fluorogypsum, phosphogypsum, etc. Optionally, the fineness of the sulfate activator is not less than 300 mesh, such as 300-400 mesh.

[0009] Furthermore, the specific surface area of ​​the slag powder is 400~500m² / kg; the fineness of the calcium sulfosilicate is 200~400 mesh.

[0010] Furthermore, the calcium sulfosilicate is obtained by the following method: mixing calcium raw materials, silicon raw materials, and sulfur raw materials, then calcining them, and finally rapidly cooling the calcined product to room temperature and grinding it to obtain the final product.

[0011] Further, the mass ratio of the calcareous raw material, siliceous raw material, and sulfurous raw material is 8-9:2-3:3-4. Optionally, the calcareous raw material includes at least one of limestone, carbide slag, and high-calcium fly ash. The siliceous raw material includes at least one of clay, shale, silica fume, and coal gangue. The sulfurous raw material includes at least one of dihydrate gypsum, anhydrite, desulfurized gypsum, fluorogypsum, and phosphogypsum.

[0012] Furthermore, the calcination treatment is carried out at a temperature of 1100~1200℃ for 4~6 hours.

[0013] Further, the lithium-based alkaline silicate includes at least one of lithium metasilicate (Li2SiO3), lithium orthosilicate (Li4SiO4), lithium slag, etc. Optionally, the fineness of the lithium-based alkaline silicate is 200-400 mesh.

[0014] Secondly, this invention discloses a method for preparing the highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0015] (1) Mix the slag powder, sulfate activator, calcium sulfosilicate and lithium-based alkaline silicate evenly to obtain powder for later use.

[0016] (2) The benzyltrimethylammonium hydroxide is mixed with powder and then ground to obtain the supersulfate cement material.

[0017] Finally, this invention discloses the application of the high carbonation-resistant supersulfate cement material in fields such as building engineering, road engineering, bridge engineering, and marine engineering.

[0018] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0019] The present invention relates to a persulfate cement that, by introducing calcium sulfosilicate as an "actively consumed sacrificial protective phase" and constructing a quaternary ammonium alkali-lithium-based alkaline silicate composite alkaline activation system, not only improves the carbonation resistance of persulfate cement but also enhances the mechanical properties of the cement material. This is because: First, the calcium sulfosilicate exists stably as an inert filler during the hydration stage of persulfate cement and gradually forms a physical encapsulation with the CSH gel and ettringite formed by the slag hydration. When carbon dioxide invades, the calcium sulfosilicate preferentially undergoes a carbonation reaction, generating calcium carbonate, amorphous silica, and calcium sulfate. Among these, calcium carbonate and amorphous silica fill the pores and compact the cement matrix, preventing further carbon dioxide intrusion. The calcium sulfate replenishes sulfate ions in the system, promoting the formation of ettringite, thereby compensating for carbonation shrinkage. By introducing calcium sulfosilicate as an "actively consumed sacrificial protective phase" into persulfate cement, the present invention achieves a mechanism shift from "passively delaying" to "actively consuming" and autonomously blocking the carbon dioxide intrusion path, effectively improving the carbonation resistance of persulfate cement. Secondly, this invention utilizes the quaternary ammonium base-lithium base basic silicate composite activation system constructed from the lithium-based basic silicate and benzyltrimethylammonium hydroxide to achieve precise surface activation of calcium sulfosilicate while retaining its inert host properties. This is because: on the one hand, calcium sulfosilicate is activated in the hypersulfate system of this invention by the Al released from the decomposition of slag. 3+ Upon attack, the surface undergoes slight dissolution, releasing Ca²⁺ and silicate ions that react on the calcium sulfosilicate surface to form a CSH gel layer. Meanwhile, lithium ions released by the lithium-based alkaline silicate adhere to the calcium sulfosilicate surface through electrostatic adsorption, occupying active sites and inhibiting dissolution. This regulation ensures both a strong bond between the calcium sulfosilicate particles and the cementitious matrix due to the formation of CSH and the retention of sufficient active cores as carbonization sacrificial phases, resulting in a unique structure of "weak surface hydration - core retention." Furthermore, the silicate ions provided by the lithium-based alkaline silicate reduce the Ca / Si ratio of the CSH gel, increasing the polymerization degree of the silicon-oxygen tetrahedra, forming a more dense and chemically stable CSH gel. Simultaneously, Li... +The inclusion of benzyltrimethylammonium hydroxide in the CSH structure further increases the gel density, a mechanism that significantly increases the difficulty of carbon dioxide diffusion. Furthermore, the surface of the ettringite crystals is positively charged due to the exposed Ca²⁺ layer, while benzyltrimethylammonium hydroxide and lithium ions are both cations and cannot adsorb onto the ettringite surface. This avoids interfering with the nucleation and growth of ettringite, ensuring the integrity of the main strength framework and achieving selective protection of ettringite, ensuring that the improvement in anti-carbonation performance does not come at the expense of mechanical properties. Finally, this invention also utilizes the properties of benzyltrimethylammonium hydroxide to replace traditional inorganic alkali activators (such as water glass, sodium hydroxide, etc.) to activate the slag, enhancing its hydration activity and preventing problems such as excessively high local alkalinity, shrinkage cracking, and subsequent strength reduction that are easily caused by traditional inorganic alkali activators. Attached Figure Description

[0020] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention and do not constitute an undue limitation of the invention.

[0021] Figure 1 The image shows a sample of the supersulfate cement material prepared in Example 1 below.

[0022] Figure 2 The image below shows the 7-day carbonization depth test result of Example 1.

[0023] Figure 3 The image shows a sample of the supersulfate cement material prepared in Example 2 below.

[0024] Figure 4 The following is a 7-day carbonization depth test image of Example 2.

[0025] Figure 5 The image shows a sample of the supersulfate cement material prepared in Example 3 below.

[0026] Figure 6 The following is a 7-day carbonization depth test image of Example 3.

[0027] Figure 7 The image shows a sample of the supersulfate cement material prepared in Example 4 below.

[0028] Figure 8 The image below shows the 7-day carbonization depth test result of Example 4.

[0029] Figure 9 The image shows a sample of the supersulfate cement material prepared in Example 5 below.

[0030] Figure 10 The image below shows the 7-day carbonization depth test result of Example 5.

[0031] Figure 11The image shows a sample of the supersulfate cement material prepared in Example 6 below.

[0032] Figure 12 The image below shows the 7-day carbonization depth test result of Example 6.

[0033] Figure 13 The image shows a sample of the supersulfate cement material prepared in Example 7 below.

[0034] Figure 14 The image below shows the 7-day carbonization depth test result for Example 7. Detailed Implementation

[0035] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the invention. Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as those skilled in the art. The preferred embodiments and materials described in this invention are for illustrative purposes only. The technical solutions of the present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0036] Example 1: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0037] (1) Mix limestone, silica fume and gypsum dihydrate in a mass ratio of 8:2:3 and grind them. Then heat the mixed powder to 1150℃ and keep it at that temperature for 4.5 hours. After that, cool the calcined product to room temperature and grind it. Then pass it through a 300-mesh sieve to obtain calcium sulfosilicate powder for later use.

[0038] (2) Take the following raw materials in the following proportions: 65 parts by weight of S95 slag powder, 15 parts by weight of sulfate activator (desulfurized gypsum), 20 parts by weight of calcium sulfosilicate powder in this embodiment, 4 parts by weight of lithium-based alkaline silicate (lithium metasilicate), and 0.5 parts by weight of benzyltrimethylammonium hydroxide. Wherein: the surface area of ​​the slag powder is 472.6 m² / kg, the fineness of the sulfate activator is 300 mesh, and the fineness of the lithium-based alkaline silicate is 300 mesh.

[0039] (3) The slag powder, sulfate activator, calcium sulfosilicate powder, and lithium-based alkaline silicate are mixed evenly to obtain a powder. Then, the benzyltrimethylammonium hydroxide is mixed with the powder and ground, and then passed through a 350-mesh sieve to obtain the supersulfate cement material (e.g. Figure 1 (As shown).

[0040] Performance Testing: The supersulfate cement material prepared in this embodiment was mixed with water at a water-cement ratio of 1:0.42 and stirred evenly. The "cement" refers to the total amount of slag powder, sulfate activator, and calcium sulfosilicate powder. The resulting slurry was then poured into molds to form specimens, which were then placed in a standard curing chamber (temperature (20±1)℃, relative humidity (95±1)%) for 28 days. The specimens were then subjected to carbonation treatment for 7 days and 14 days according to the "Test Method for Carbonation of Cement Mortar" (GB / T 42277-2022). The compressive strength and carbonation depth of the specimens were then tested. The results are shown in Table 1 below, where the 7-day carbonation depth test diagram is shown in... Figure 2 As shown.

[0041] Table 1

[0042] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 49.2MPa 56.7MPa 2.3mm 3.9mm

[0043] Example 2: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0044] (1) Mix calcium carbide slag, coal gangue and gypsum in a mass ratio of 9:3:4 and grind them. Then heat the mixed powder to 1100℃ and keep it warm for 6 hours. After completion, air cool the calcined product to room temperature, grind it, and pass it through a 200-mesh sieve to obtain calcium sulfosilicate powder for later use.

[0045] (2) Take the following raw materials in the following proportions: 50 parts by weight of S95 slag powder, 10 parts by weight of sulfate activator (fluorogypsum), 15 parts by weight of calcium sulfosilicate powder in this embodiment, 1 part by weight of lithium-based alkaline silicate (lithium metasilicate), and 0.2 parts by weight of benzyltrimethylammonium hydroxide. Wherein: the surface area of ​​the slag powder is 400.3 m² / kg, the fineness of the sulfate activator is 350 mesh, and the fineness of the lithium-based alkaline silicate is 200 mesh.

[0046] (3) The slag powder, sulfate activator, calcium sulfosilicate, and lithium-based alkaline silicate are mixed evenly to obtain a powder. Then, the benzyltrimethylammonium hydroxide is mixed with the powder and ground, and then passed through a 350-mesh sieve to obtain the supersulfate cement material (e.g. Figure 3 (As shown).

[0047] Performance testing: The various performance indicators of the supersulfate cement material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in Table 2 below, where the 7-day carbonation depth test graph is shown in the figure. Figure 4 As shown.

[0048] Table 2

[0049] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 45.5MPa 52.4MPa 3.5mm 5.2mm

[0050] Example 3: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0051] (1) Mix limestone, coal gangue and desulfurized gypsum in a mass ratio of 8.5:2.8:2.3 and grind them. Then heat the mixed powder to 1200℃ and keep it at that temperature for 4 hours. After that, air cool the calcined product to room temperature, grind it, and pass it through a 400-mesh sieve to obtain calcium sulfosilicate powder for later use.

[0052] (2) Take the following raw materials in the following proportions: 70 parts by weight of S95 slag powder, 20 parts by weight of sulfate activator (gypsum dihydrate), 25 parts by weight of calcium sulfosilicate powder in this embodiment, 5 parts by weight of lithium-based alkaline silicate (lithium orthosilicate), and 0.8 parts by weight of benzyltrimethylammonium hydroxide. Wherein: the surface area of ​​the slag powder is 499.6 m² / kg, the fineness of the sulfate activator is 400 mesh, and the fineness of the lithium-based alkaline silicate is 400 mesh.

[0053] (3) The slag powder, sulfate activator, calcium sulfosilicate powder, and lithium-based alkaline silicate are mixed evenly to obtain a powder. Then, the benzyltrimethylammonium hydroxide is mixed with the powder and ground, and then passed through a 400-mesh sieve to obtain the supersulfate cement material (e.g. Figure 5 (As shown).

[0054] Performance testing: The various performance indicators of the supersulfate cement material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in Table 3 below, where the 7-day carbonation depth test graph is shown in the figure. Figure 6 As shown.

[0055] Table 3

[0056] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 51.2MPa 61.7MPa 2.0mm 3.5mm

[0057] Example 4: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0058] (1) Take the following raw materials in the following proportions: 65 parts by weight of S95 slag powder, 15 parts by weight of sulfate activator (desulfurized gypsum), 4 parts by weight of lithium-based alkaline silicate (lithium metasilicate), and 0.5 parts by weight of benzyltrimethylammonium hydroxide. Wherein: the surface area of ​​the slag powder is 472.6 m² / kg, and the fineness of the lithium-based alkaline silicate is 300 mesh.

[0059] (2) The slag powder, sulfate activator, and lithium-based alkaline silicate are mixed evenly to obtain a powder. Then, the benzyltrimethylammonium hydroxide is mixed with the powder and ground, and then passed through a 350-mesh sieve to obtain the supersulfate cement material (e.g., Figure 7 (As shown).

[0060] Performance testing: The various performance indicators of the supersulfate cement material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in Table 4 below, where the 7-day carbonation depth test graph is shown in the figure. Figure 8 As shown.

[0061] Table 4

[0062] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 40.8MPa 43.6MPa 6.8mm 9.6mm

[0063] Example 5: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0064] (1) Mix limestone, coal gangue and desulfurized gypsum in a mass ratio of 8.5:2.8:2.3 and grind them. Then heat the mixed powder to 1200℃ and keep it at that temperature for 4 hours. After that, air cool the calcined product to room temperature, grind it, and pass it through a 400-mesh sieve to obtain calcium sulfosilicate powder for later use.

[0065] (2) Take the following raw materials in the following proportions: 70 parts by weight of S95 slag powder, 20 parts by weight of sulfate activator (gypsum dihydrate), 25 parts by weight of calcium sulfosilicate powder in this embodiment, and 0.8 parts by weight of benzyltrimethylammonium hydroxide. Wherein: the surface area of ​​the slag powder is 499.6 m² / kg, and the fineness of the sulfate activator is 400 mesh.

[0066] (3) The slag powder, sulfate activator, and calcium sulfosilicate powder are mixed evenly to obtain a powder. Then, the benzyltrimethylammonium hydroxide is mixed with the powder and ground, and then passed through a 400-mesh sieve to obtain the supersulfate cement material (e.g., Figure 9 (As shown).

[0067] Performance testing: The various performance indicators of the supersulfate cement material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in Table 5 below, where the 7-day carbonation depth test graph is shown in the figure. Figure 10 As shown.

[0068] Table 5

[0069] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 45.5MPa 49.3MPa 6.1mm 8.6mm

[0070] Example 6: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0071] (1) Mix calcium carbide slag, coal gangue and gypsum in a mass ratio of 9:3:4 and grind them. Then heat the mixed powder to 1100℃ and keep it warm for 6 hours. After completion, air cool the calcined product to room temperature, grind it, and pass it through a 200-mesh sieve to obtain calcium sulfosilicate powder for later use.

[0072] (2) Take the following raw materials in the following proportions: 50 parts by weight of S95 slag powder, 10 parts by weight of sulfate activator (fluorogypsum), 15 parts by weight of calcium sulfosilicate powder in this embodiment, 1 part by weight of lithium-based alkaline silicate (lithium metasilicate), and 0.2 parts by weight of sodium hydroxide powder. Wherein: the surface area of ​​the slag powder is 400.3 m² / kg, the fineness of the sulfate activator is 350 mesh, and the fineness of the lithium-based alkaline silicate is 200 mesh.

[0073] (3) The slag powder, sulfate activator, calcium sulfosilicate, and lithium-based alkaline silicate are mixed evenly to obtain a powder. Then, the sodium hydroxide powder is mixed with the powder and ground, and then passed through a 350-mesh sieve to obtain the supersulfate cement material (e.g., Figure 11 (As shown).

[0074] Performance testing: The various performance indicators of the supersulfate cement material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in Table 6 below, where the 7-day carbonation depth test graph is shown in the figure. Figure 12 As shown.

[0075] Table 6

[0076] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 46.8MPa 43.1MPa 4.7mm 6.7mm

[0077] Example 7: A method for preparing a highly carbonation-resistant supersulfate cement material, comprising the following steps:

[0078] (1) Mix limestone, silica fume and gypsum dihydrate in a mass ratio of 8:2:3 and grind them. Then heat the mixed powder to 1150℃ and keep it at that temperature for 4.5 hours. After that, cool the calcined product to room temperature and grind it. Then pass it through a 300-mesh sieve to obtain calcium sulfosilicate powder for later use.

[0079] (2) Take the following raw materials in the following proportions: 65 parts by weight of S95 slag powder, 15 parts by weight of sulfate activator (desulfurized gypsum), 20 parts by weight of calcium sulfosilicate powder in this embodiment, and 4 parts by weight of lithium-based alkaline silicate (lithium metasilicate). Wherein: the surface area of ​​the slag powder is 472.6 m² / kg, the fineness of the sulfate activator is 300 mesh, and the fineness of the lithium-based alkaline silicate is 300 mesh.

[0080] (3) The slag powder, sulfate activator, calcium sulfosilicate powder, and lithium-based alkaline silicate are mixed evenly to obtain a powder. The powder is then ground and passed through a 350-mesh sieve to obtain supersulfate cement material (such as...). Figure 13 (As shown).

[0081] Performance testing: The various performance indicators of the supersulfate cement material prepared in this embodiment were tested using the same method as in Example 1 above. The results are shown in Table 7 below, where the 7-day carbonation depth test graph is shown in the figure. Figure 14As shown.

[0082] Table 7

[0083] Performance indicators 7d compressive strength 14d compressive strength 7d carbonization depth 14d carbonization depth Test Results 35.4MPa 40.3MPa 9.4mm 13.3mm

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of the present invention.

Claims

1. A highly carbonation-resistant supersulfate cement material, characterized in that, It includes the following components in the following proportions: 50-70 parts by weight of slag powder, 10-20 parts by weight of sulfate activator, 15-25 parts by weight of calcium sulfosilicate, 1-5 parts by weight of lithium-based alkaline silicate, and 0.2-0.8 parts by weight of benzyltrimethylammonium hydroxide. The lithium-based alkaline silicate includes at least one of lithium metasilicate, lithium orthosilicate, and lithium slag.

2. The high carbonation-resistant supersulfate cement material according to claim 1, characterized in that, The specific surface area of ​​the slag powder is 400~500m² / kg.

3. The high carbonation-resistant supersulfate cement material according to claim 1, characterized in that, The sulfate activator includes at least one of the following: gypsum dihydrate, desulfurized gypsum, fluorogypsum, and phosphogypsum.

4. The high carbonation-resistant supersulfate cement material according to claim 1, characterized in that, The fineness of the sulfate activator is not less than 300 mesh.

5. The high carbonation-resistant supersulfate cement material according to claim 1, characterized in that, The calcium sulfosilicate has a fineness of 200-400 mesh.

6. The high carbonation-resistant supersulfate cement material according to any one of claims 1-5, characterized in that, The calcium sulfosilicate is obtained by the following method: calcium raw materials, silicon raw materials and sulfur raw materials are mixed and then calcined. After completion, the calcined product is rapidly cooled to room temperature and then ground to obtain the final product.

7. The high carbonation-resistant supersulfate cement material according to claim 6, characterized in that, The mass ratio of the calcium raw material, silicon raw material, and sulfur raw material is 8~9:2~3:3~4.

8. The high carbonation-resistant supersulfate cement material according to claim 6, characterized in that, The calcination treatment is carried out at a temperature of 1100~1200℃ for 4~6 hours.

9. The high carbonation-resistant supersulfate cement material according to claim 6, characterized in that, The calcium-based raw materials include at least one of limestone, carbide slag, and high-calcium fly ash.

10. The high carbonation-resistant hypersulfate cement material according to claim 6, characterized in that, The siliceous raw materials include at least one of clay, shale, silica fume, and coal gangue.

11. The high carbonation-resistant supersulfate cement material according to claim 6, characterized in that, The sulfur-containing raw materials include at least one of the following: gypsum dihydrate, anhydrite, desulfurized gypsum, fluorogypsum, and phosphogypsum.

12. The high carbonation-resistant supersulfate cement material according to any one of claims 1-5, characterized in that, The lithium-based alkaline silicate has a fineness of 200-400 mesh.

13. The method for preparing the high carbonation-resistant hypersulfate cement material according to any one of claims 1-12, characterized in that, Includes the following steps: (1) Mix the slag powder, sulfate activator, calcium sulfosilicate, and lithium-based alkaline silicate evenly to obtain a powder for later use; (2) The benzyltrimethylammonium hydroxide is mixed with powder and then ground to obtain the supersulfate cement material.

14. The application of the high carbonation-resistant persulfate cement material according to any one of claims 1-12, or the high carbonation-resistant persulfate cement material obtained by the preparation method according to claim 13, in building engineering, road engineering, bridge engineering, or marine engineering.

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