High-wear-resistance and corrosion-resistance cement-based floor material and application thereof

Abstract

The invention discloses a high-wear-resistance and corrosion-resistance cement-based floor material and application thereof, and belongs to the technical field of building materials. The floor material is prepared from the following components in parts by weight: 38 to 45 parts of Portland cement, 5 to 8 parts of sulphoaluminate cement, 8 to 12 parts of gypsum, 13 to 16 parts of mineral powder, 5 to 8 parts of silica fume, 15 to 18 parts of quartz powder, 100 to 120 parts of modified wear-resistant aggregate, 2 to 4 parts of corrosion inhibitor, 7 to 14 parts of modified steel fiber, 15 to 20 parts of water and 1 to 3 parts of water reducing agent, wherein the modified wear-resistant aggregate is subjected to surface modification through glaze; the corrosion inhibitor comprises sodium metasilicate, lithium water glass and magnesium fluosilicate; the modified steel fiber is subjected to surface modification through sodium metasilicate. The terrace material has high strength, high wear resistance and good acid and alkali resistance, is environment-friendly and pollution-free, and can be used in heavy-load service ground environments such as environmental protection factories, garbage treatment plants, warehouse logistics, parking lots and chemical workshops.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a high wear-resistant and corrosion-resistant cement-based flooring material and its application. Background Technology

[0002] As a crucial foundational layer in industrial plants, warehousing and logistics facilities, parking lots, and chemical workshops, flooring materials endure severe wear and tear from machinery and transport vehicles, as well as corrosion from oil, chemicals, and humid environments. Their performance directly impacts service life, maintenance costs, and production safety. Currently, widely used flooring materials include epoxy resin, polyurethane organic flooring, and traditional cement-based flooring, both of which have significant drawbacks. While organic epoxy resin flooring offers advantages such as a smooth and aesthetically pleasing surface and some resistance to chemical corrosion, its low hardness, poor wear resistance, and scratch resistance make it easily damaged by sharp objects. Therefore, epoxy flooring is unsuitable for heavy-duty environments such as environmental protection plants, waste treatment plants, and chemical workshops. Compared to epoxy flooring, cement-based flooring offers advantages such as high strength and good wear resistance. For example, corundum wear-resistant flooring improves surface hardness by incorporating wear-resistant aggregates. However, its corrosion resistance is extremely poor. The calcium hydroxide produced during cement hydration and the capillary network make it susceptible to corrosion by acidic substances, leading to surface powdering and loss of strength.

[0003] To address these issues, existing technologies have employed various improvement measures. Some methods improve wear resistance by adding wear-resistant aggregates such as corundum to cement-based materials. Regarding corrosion protection, some involve applying epoxy-based organic coatings to the surface of cement-based floors to enhance corrosion resistance. However, organic coatings exhibit poor wear resistance and low adhesion strength to inorganic cement substrates. Under heavy loads and other factors, they are prone to cracking and powdering, making it difficult to provide durable and effective corrosion protection.

[0004] Given the limitations of traditional cement flooring in terms of wear resistance and corrosion resistance, as well as the inadequacy of existing improvement technologies, developing a cement flooring material that combines high wear resistance and strong corrosion resistance is of significant practical importance. Summary of the Invention In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a high wear-resistant and corrosion-resistant cement-based flooring material and its application. This flooring material has high strength, high wear resistance and good acid and alkali resistance, and is environmentally friendly and pollution-free. It can be used in heavy-duty ground environments such as environmental protection factories, waste treatment plants, warehousing and logistics, parking lots and chemical workshops.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high wear-resistant and corrosion-resistant cement-based flooring material comprises the following components by weight: 38-45 parts silicate cement, 5-8 parts sulfoaluminate cement, 8-12 parts gypsum, 13-16 parts mineral powder, 5-8 parts silica fume, 15-18 parts quartz powder, 100-120 parts modified wear-resistant aggregate, 2-4 parts corrosion inhibitor, 7-14 parts modified steel fiber, 15-20 parts water, and 1-3 parts water-reducing agent; wherein: Modified wear-resistant aggregate is prepared by sintering glaze powder onto the surface of high-alumina aggregate; the glaze comprises, by weight: 50-70 parts quartz powder, 15-25 parts feldspar, 5-15 parts calcite, 3-8 parts borax, and 2-5 parts kaolin. The corrosion inhibitor comprises, by weight, 2-4 parts sodium metasilicate, 2-4 parts lithium silicate, and 1-2 parts magnesium fluorosilicate; The modified steel fiber is prepared by pretreating the steel fiber by immersing it in acid, then immersing it in a sodium metasilicate solution, and finally drying it.

[0006] According to the above scheme, the strength grade of the silicate cement is PO 42.5 or PO 52.5.

[0007] According to the above scheme, the strength grade of the sulfoaluminate cement is R·SAC 42.5 or R·SAC 52.5.

[0008] According to the above scheme, the gypsum is anhydrous gypsum.

[0009] According to the above scheme, the water requirement ratio of the mineral powder is not greater than 103%, and the 28-day activity index is not less than 95%.

[0010] According to the above scheme, the water requirement ratio of the silica fume is not greater than 120%, and the 28-day activity index is not less than 115%.

[0011] According to the above scheme, in the preparation process of the modified wear-resistant aggregate, the sintering process is to hold at a temperature of 900-1150℃ for 20-60 minutes.

[0012] According to the above scheme, the mass ratio of high-alumina aggregate to glaze powder is 100:5-15.

[0013] According to the above scheme, the Al2O3 content in high-alumina aggregate is ≥65%.

[0014] According to the above scheme, the particle size of high-alumina aggregate is 0.5-3.0 mm; the particle size of glaze powder raw material is ≥300 mesh.

[0015] According to the above scheme, the water-reducing agent is a polycarboxylate high-efficiency water-reducing agent with a water reduction rate of ≥30%.

[0016] According to the above scheme, the nominal length of the modified steel fiber is 10-14 mm, the nominal diameter is 0.14-0.26 mm, and the tensile strength is ≥2000 MPa.

[0017] According to the above scheme, the preparation of the modified wear-resistant aggregate specifically includes the following steps: 1) Place the high-alumina aggregate and glaze powder in a mixer and mix them evenly so that a layer of glaze powder is evenly adhered to the surface of the aggregate; then spray the sodium carboxymethyl cellulose aqueous solution by spraying to make the glaze powder adhere more firmly, and obtain the glazed aggregate. 2) After evenly spreading the glazed aggregate obtained in step 1), sinter it at 900-1150℃ for 20-60 minutes to obtain the modified wear-resistant aggregate.

[0018] Preferably, in step 1), the mass concentration of the sodium carboxymethyl cellulose aqueous solution is 8-12%.

[0019] Preferably, in step 2), the heating rate is 5-10℃ / min.

[0020] According to the above scheme, the preparation of the modified steel fiber includes the following steps: 1) Immerse the steel fibers in an acid solution to remove the surface oxide layer and increase the surface roughness. After taking out the steel fibers, clean and dry them to obtain pretreated steel fibers. 2) Immerse the pretreated steel fibers obtained in step 1) in a sodium metasilicate solution and stir at a temperature of 60-80℃ to ensure that the steel fibers are in full contact with the sodium metasilicate solution. 3) Take out the steel fibers processed in step 2) and dry them to obtain modified steel fibers.

[0021] Preferably, in step 1), the acid solution is a dilute hydrochloric acid or sulfuric acid solution with a mass concentration of 5-10%.

[0022] Preferably, in step 1), the steel fiber is immersed in the acid solution for 1-3 minutes.

[0023] Preferably, in step 1), after the steel fiber is removed, it is rinsed with water until neutral, quickly placed in ethanol or acetone to dehydrate, and then taken out and dried at 40~60℃ for later use.

[0024] Preferably, in step 2), the mass concentration of the sodium metasilicate solution is 5-15%.

[0025] Preferably, in step 2), the immersion and stirring time is 10-30 minutes.

[0026] Preferably, in step 2), the drying process is as follows: take out the treated steel fiber, drain the excess solution, dry it at 100-120℃ for 30-60 minutes, and finally cool it to room temperature.

[0027] This invention provides an application of the aforementioned flooring material as a key basic functional layer in environmental protection factories, waste treatment plants, warehousing and logistics facilities, parking lots, or chemical workshops.

[0028] This invention provides a highly wear-resistant and corrosion-resistant cement-based flooring material, obtained by synergistic combination of modified wear-resistant aggregates, corrosion inhibitors, and modified steel fibers with other components. It exhibits high strength, high wear resistance, and good acid and alkali resistance. The specific mechanism is as follows: High-alumina aggregates have high hardness and excellent wear resistance, making them ideal for improving the mechanical and wear resistance of flooring. However, due to their amphoteric oxide nature, poor acid resistance is an inherent weakness. This invention addresses this issue by applying a glaze to the surface of high-alumina aggregates. Because the surface of high-alumina aggregates contains numerous micropores, the glaze melts into a glassy liquid phase at high temperatures, covering the entire surface of the aggregate and sealing its open pores. This glaze tightly bonds with the high-alumina aggregate, forming a dense glassy glaze layer upon cooling, effectively blocking H2O. + The modified high-alumina aggregate retains its high strength, wear resistance, and alkali resistance characteristics, while the surface glaze layer is an acid-resistant reinforcing layer, giving the aggregate both acid and alkali resistance.

[0029] Corrosion inhibitors include sodium metasilicate, lithium silicate glass, and magnesium fluorosilicate. Specifically, in the alkaline environment of cement-based flooring materials, the sodium metasilicate in the corrosion inhibitor, after dissolving, further provides a strongly alkaline environment, which can stimulate the reaction rate in mineral admixtures, generating more CSH gel. Furthermore, silicate ions can react with Ca2+ released during cement hydration. 2+ Ionic reactions generate a low-solubility, gel-like micron-sized gel, which can effectively block larger pores such as capillaries and microcracks. The Li in lithium-ion glass... + With SiO3 2- The reaction product, sodium metasilicate, lithium silicate, and magnesium fluorosilicate, reacts with Ca(OH)₂ produced during cement hydration to generate stable, water-insoluble products such as CSH gel and spodumene minerals. These reaction products, in nano-sized gel form, efficiently fill the capillaries and pores of the cement stone, significantly reducing the material's porosity, especially reducing harmful interconnected pores and effectively cutting off the transport paths of corrosive media (acids, alkalis, and salt ions). Simultaneously, the CaF₂ and other sparingly soluble substances generated from the hydrolysis of magnesium fluorosilicate, with particle sizes between the two, further optimize the pore-filling structure and improve the matrix density. The synergistic reaction of sodium metasilicate, lithium silicate, and magnesium fluorosilicate ultimately forms a composite, dense protective layer on the floor surface and within the pores, composed of high-strength CSH gel, inert calcium fluoride, and other sparingly soluble substances. This protective layer possesses high hardness, high density, low permeability, and chemical inertness, effectively resisting the combined erosion of abrasion and chemical media.

[0030] Steel fibers can improve the impact resistance and wear resistance of flooring. However, conventional steel fibers are easily corroded by acidic substances or undergo oxidation and rust. The modified steel fibers provided by this invention are modified with sodium metasilicate after pretreatment in acid. Sodium metasilicate can slightly passivate the surface of the steel fibers, forming an insoluble iron silicate composite protective layer. At the same time, sodium silicate ions are adsorbed on the surface of the steel fibers to form a silica gel-like protective film, thereby improving the corrosion resistance of the steel fibers and preventing the surface of the steel fibers from contacting acidic media, chloride ions and other substances, thus improving their durability in flooring.

[0031] The beneficial effects of this invention are as follows: This invention provides a high wear-resistant and corrosion-resistant cement-based flooring material, obtained through the synergistic combination of modified wear-resistant aggregates, corrosion inhibitors, and modified steel fibers with other components. Specifically, the corrosion inhibitors, including sodium metasilicate, lithium silicate, and magnesium fluorosilicate, react synergistically to form a dense composite protective layer on the floor surface and within the pores. This layer consists of high-strength CSH gel, inert calcium fluoride, and other insoluble substances, further enhancing its density and preventing the intrusion of corrosive media. The surface glaze layer of the modified high-alumina aggregate is an acid-resistant reinforcing layer, retaining the high strength, wear resistance, and alkali resistance of the high-alumina aggregate while also providing acid resistance. Furthermore, the synergistic effect of the modified steel fiber surface insoluble protective layer... This invention effectively prevents the steel fiber surface from contacting acidic media, chloride ions, and other substances, thus improving its durability in flooring. Furthermore, through optimized gradation and proportioning design with silica fume, mineral powder, and aggregates, the flooring achieves lower porosity under conditions of lower water-cement ratio. This invention effectively improves the mechanical properties, wear resistance, and acid and alkali resistance of the flooring, exhibiting excellent comprehensive properties such as high strength, wear resistance, and corrosion resistance. It overcomes the problems of low strength and poor corrosion resistance of traditional cement-based flooring and can be widely used in heavy-duty ground environments such as environmental protection factories, waste treatment plants, warehousing and logistics facilities, parking lots, and chemical workshops, demonstrating broad application prospects. Detailed Implementation

[0032] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, the specific embodiments of the present invention are now described in detail.

[0033] In the following embodiments, the strength grade of the silicate cement is PO 52.5, the strength grade of the sulfoaluminate cement is R·SAC 42.5, the gypsum is anhydrous gypsum, the water requirement of the mineral powder is 98%, and the 28-day activity index is 99%; the water requirement of the silica fume is 110%, and the 28-day activity index is 117%; the water-reducing agent is a polycarboxylate high-efficiency water-reducing agent with a water reduction rate of 30%.

[0034] The modified wear-resistant aggregate is prepared by the following method: 1) Aggregate pretreatment: Select high-alumina aggregate with an Al2O3 content of 70%, wash and dry it, and then sieve it to the required particle size (0.5-3.0mm).

[0035] 2) Glaze preparation: The particle size of the glaze raw materials is controlled at 325 mesh. The glaze raw materials are dry mixed evenly. The glaze includes, by weight, 60 parts of quartz powder, 18 parts of feldspar, 10 parts of calcite, 6 parts of borax, and 4 parts of kaolin.

[0036] 3) Glazing: The pretreated aggregate and glaze powder are mixed evenly in a mixer at a mass ratio of 100:10, so that a layer of glaze powder is evenly adhered to the surface of the aggregate. Then, a small amount of 10wt% sodium carboxymethyl cellulose aqueous solution is sprayed to make the glaze powder adhere more firmly.

[0037] 4) Sintering: The glazed aggregate is evenly spread on the refractory pad and placed in the sintering kiln. The temperature is raised to 1000℃ at a rate of 10℃ / min in air atmosphere and held at this temperature for 50 minutes.

[0038] 5) Cooling: Cool to room temperature with the furnace to obtain modified wear-resistant aggregate.

[0039] The corrosion inhibitor comprises the following components: 4 parts sodium metasilicate, 3 parts lithium water glass, and 2 parts magnesium fluorosilicate.

[0040] The modified steel fiber has a nominal length of 12 mm, a nominal diameter of 0.2 mm, and a tensile strength of 2100 MPa. It is prepared by the following method: 1) Immerse the steel fiber in 8% dilute hydrochloric acid for 2 minutes, rinse with water until neutral, quickly put it into ethanol to dehydrate, and then take it out and dry it at 50°C for later use.

[0041] 2) Dissolve sodium metasilicate in deionized water to prepare a 12% (w / w) solution. Completely immerse the pretreated steel fibers in the sodium metasilicate solution and soak them at a constant temperature of 65°C for 25 minutes, stirring evenly during the process to ensure that the steel fibers are in full contact with the sodium metasilicate solution.

[0042] 3) Remove the treated steel fibers and drain off excess solution. Dry at 110℃ for 50 minutes, and finally cool to room temperature to obtain modified steel fibers.

[0043] The high wear-resistant and corrosion-resistant cement-based flooring material described in Examples 1-3 includes silicate cement, sulfoaluminate cement, gypsum, mineral powder, silica fume, quartz powder, modified wear-resistant aggregate, corrosion inhibitor, modified steel fiber, water, and water-reducing agent as raw materials.

[0044] Example 1 This embodiment provides a high wear-resistant and corrosion-resistant cement-based flooring material, which, by weight, includes the following components: 40 parts silicate cement, 6 parts sulfoaluminate cement, 10 parts gypsum, 14 parts mineral powder, 6 parts silica fume, 15 parts quartz powder, 105 parts modified wear-resistant aggregate, 2 parts corrosion inhibitor, 9 parts modified steel fiber, 17 parts water, and 2 parts water-reducing agent.

[0045] Example 2 This embodiment provides a high wear-resistant and corrosion-resistant cement-based flooring material, which, by weight, comprises the following components: 42 parts silicate cement, 7 parts sulfoaluminate cement, 12 parts gypsum, 15 parts mineral powder, 7 parts silica fume, 16 parts quartz powder, 110 parts modified wear-resistant aggregate, 2.5 parts corrosion inhibitor, 13 parts modified steel fiber, 19 parts water, and 2.5 parts water-reducing agent.

[0046] Example 3 This embodiment provides a high wear-resistant and corrosion-resistant cement-based flooring material, which, by weight, comprises the following components: 39 parts silicate cement, 6 parts sulfoaluminate cement, 8 parts gypsum, 16 parts mineral powder, 8 parts silica fume, 17 parts quartz powder, 113 parts modified wear-resistant aggregate, 3 parts corrosion inhibitor, 11 parts modified steel fiber, 18 parts water, and 1.8 parts water-reducing agent.

[0047] Comparative Example 1 The difference between this comparative example and Example 1 is that the modified wear-resistant aggregate is replaced by an equal weight of ordinary unmodified wear-resistant aggregate.

[0048] Comparative Example 2 The difference between this comparative example and Example 1 is that the modified wear-resistant aggregate is replaced by an equal weight of quartz sand aggregate with the same particle size.

[0049] Comparative Example 3 The difference between this comparative example and Example 1 is that the corrosion inhibitor in the raw materials has been removed.

[0050] Comparative Example 4 The difference between this comparative example and Example 1 is that the modified steel fibers are replaced by an equal weight of ordinary unmodified steel fibers.

[0051] Comparative Example 5 The difference between this comparative example and Example 1 is that the modified wear-resistant aggregate is replaced by an equal weight of quartz sand aggregate with the same particle size, the corrosion inhibitor in the raw materials is removed, and the modified steel fiber is replaced by an equal weight of ordinary unmodified steel fiber.

[0052] To verify the advanced performance indicators of the high wear-resistant and corrosion-resistant cement-based flooring materials in Examples 1-3, performance tests were conducted on the 28-day compressive strength, 28-day flexural strength, abrasion resistance ratio, acid resistance, and alkali resistance of the flooring materials in Examples 1-3 and Comparative Examples 1-5. The compressive and flexural strengths were tested according to GB / T 17671-2021 Cement Mortar Strength Test Method (ISO Method), with specimen dimensions of 40mm×40mm×160mm. Abrasion resistance was tested according to GB / T 16925-1997 Concrete and its Products Abrasion Resistance Test Method (Ball Bearing Method), using the abrasion amount under standard sand abrasion as a benchmark to calculate the abrasion resistance ratio of the specimen; a higher value indicates better abrasion resistance. The acid resistance test method was as follows: specimens cured for 28 days were further immersed in 5% H2SO4 for 28 days, and the strength retention rate and mass loss rate were tested. The alkali resistance test method was as follows: specimens cured for 28 days were further immersed in 10% NaOH for 28 days, and the strength retention rate and mass loss rate were tested. The test results are shown in Table 1.

[0053] Table 1 Performance test results of Examples 1-3 and Comparative Examples 1-5

[0054] The high wear-resistant and corrosion-resistant cement-based flooring prepared in Examples 1-3 exhibits excellent mechanical and wear-resistant properties, with an wear resistance ratio exceeding 360%. Furthermore, after immersion in 5% H₂SO₄ and 10% NaOH solutions for 28 days, its strength retention rate is above 90%, and the mass loss rate is relatively small, indicating good resistance to acid and alkali corrosion. In Comparative Example 1, replacing the modified wear-resistant aggregate with an equal weight of ordinary unmodified wear-resistant aggregate resulted in a decrease in the acid resistance of the prepared flooring material. In Comparative Example 2, replacing the modified wear-resistant aggregate with quartz sand aggregate of the same particle size resulted in a decrease in the alkali resistance of the prepared flooring material, demonstrating that the modified wear-resistant aggregate provided by this invention significantly improves the acid and alkali corrosion resistance of the flooring. In Comparative Example 3, removing the corrosion inhibitor significantly reduced both the acid and alkali resistance of the flooring material, indicating that corrosive ions penetrated the matrix through capillary action, reducing the strength of the flooring material. Comparative Example 4 used ordinary steel fibers, which are susceptible to H₂SO₄ corrosion. + The corrosion caused the material to lose 85% of its strength after immersion in 5% H2SO4 for 28 days, indicating that the modified steel fiber has a significant effect on improving its acid resistance. In Comparative Example 5, after replacing the modified wear-resistant aggregate, corrosion inhibitor, and modified steel fiber, the acid and alkali resistance and wear resistance of the prepared flooring all decreased significantly.

[0055] This invention utilizes the synergistic effect of modified wear-resistant aggregates, composite corrosion inhibitors, and modified steel fibers to prepare a cement-based flooring material that simultaneously possesses ultra-high wear resistance, excellent acid corrosion resistance, superior mechanical properties, and high toughness, thus solving the technical challenge of traditional flooring materials that struggle to balance wear resistance and corrosion resistance.

[0056] This invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications based on the teachings of this invention without departing from the spirit and scope of the claims. All of these modifications are within the protection scope of this invention.

Claims

1. A high wear-resistant and corrosion-resistant cement-based flooring material, characterized in that, The composition includes the following components by weight: 38-45 parts silicate cement, 5-8 parts sulfoaluminate cement, 8-12 parts gypsum, 13-16 parts mineral powder, 5-8 parts silica fume, 15-18 parts quartz powder, 100-120 parts modified wear-resistant aggregate, 2-4 parts corrosion inhibitor, 7-14 parts modified steel fiber, 15-20 parts water, and 1-3 parts water-reducing agent; wherein: Modified wear-resistant aggregate is prepared by sintering glaze powder onto the surface of high-alumina aggregate; the glaze comprises, by weight: 50-70 parts quartz powder, 15-25 parts feldspar, 5-15 parts calcite, 3-8 parts borax, and 2-5 parts kaolin. The corrosion inhibitor comprises, by weight, 2-4 parts sodium metasilicate, 2-4 parts lithium silicate, and 1-2 parts magnesium fluorosilicate; The modified steel fiber is prepared by pretreating the steel fiber by immersing it in acid, then immersing it in a sodium metasilicate solution, and finally drying it.

2. The flooring material according to claim 1, characterized in that, The silicate cement has a strength grade of P.O 42.5 or PO 52.5; the sulfoaluminate cement has a strength grade of R·SAC 42.5 or R·SAC 52.5; the gypsum is anhydrous gypsum; the mineral powder has a water requirement ratio of no more than 103% and a 28-day activity index of no less than 95%; the silica fume has a water requirement ratio of no more than 120% and a 28-day activity index of no less than 115%; the water-reducing agent is a polycarboxylate superplasticizer with a water reduction rate of ≥30%.

3. The flooring material according to claim 1, characterized in that, In the preparation of the modified wear-resistant aggregate, the sintering process involves holding the material at a temperature of 900-1150℃ for 20-60 minutes.

4. The flooring material according to claim 1, characterized in that, The mass ratio of high-alumina aggregate to glaze powder is 100:5-15.

5. The flooring material according to claim 1, characterized in that, The high-alumina aggregate contains ≥65% Al2O3; the particle size of the high-alumina aggregate is 0.5-3.0 mm; the particle size of the glaze powder raw material is ≥300 mesh.

6. The flooring material according to claim 1, characterized in that, The preparation of the modified wear-resistant aggregate specifically includes the following steps: 1) Place the high-alumina aggregate and glaze powder in a mixer and mix them evenly so that a layer of glaze powder is evenly adhered to the surface of the aggregate; then spray the sodium carboxymethyl cellulose aqueous solution by spraying to make the glaze powder adhere more firmly, and obtain the glazed aggregate. 2) After evenly spreading the glazed aggregate obtained in step 1), sinter it at 900-1150℃ for 20-60 minutes to obtain the modified wear-resistant aggregate.

7. The flooring material according to claim 1, characterized in that, The modified steel fiber has a nominal length of 10–14 mm, a nominal diameter of 0.14–0.26 mm, and a tensile strength ≥2000 MPa.

8. The flooring material according to claim 1, characterized in that, The preparation of the modified steel fiber includes the following steps: 1) Immerse the steel fibers in an acid solution to remove the surface oxide layer and increase the surface roughness. After taking out the steel fibers, clean and dry them to obtain pretreated steel fibers. 2) Immerse the pretreated steel fibers obtained in step 1) in a sodium metasilicate solution and stir at a temperature of 60-80℃ to ensure that the steel fibers are in full contact with the sodium metasilicate solution. 3) Take out the steel fibers processed in step 2) and dry them to obtain modified steel fibers.

9. The flooring material according to claim 8, characterized in that, In step 1), the acid solution is a dilute hydrochloric acid or sulfuric acid solution with a mass concentration of 5-10%; the steel fiber is immersed in the acid solution for 1-3 minutes; in step 2), the mass concentration of the sodium metasilicate solution is 5-15%; the immersion and stirring time is 10-30 minutes.

10. The application of the flooring material according to any one of claims 1-9 as a key basic functional layer in the ground environment of environmental protection factories, waste treatment plants, warehousing and logistics, parking lots or chemical workshops.

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