Cement-based wear-resistant material for concrete floors and method for its production

Abstract

This invention discloses a cement-based wear-resistant material for concrete floors and its preparation method, relating to the field of building materials technology. The cement-based wear-resistant material for concrete floors comprises granulated cementitious reactive powder, modified sea sand, fused alumina, basalt manufactured sand, and basalt short-cut fibers; wherein the granulated cementitious reactive powder is prepared by mixing and spray granulation of marine silicate cement, sulfoaluminate cement, pre-carbonized steel slag powder, slag powder, metakaolin, silica fume, and admixtures. This invention also provides a method for preparing the wear-resistant material. Compared with existing technologies, this invention is beneficial for improving the material's density, flexural strength, compressive strength, and wear resistance, and has better structural stability, making it suitable for the construction of wear-resistant layers on concrete floors.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a cement-based wear-resistant material for concrete floors and its preparation method. Background Technology

[0002] Cement-based wear-resistant materials for concrete floors are a type of functional building material laid on the surface of concrete base layers or concrete structures. They are typically used as floor surface layers, wear-resistant layers, or surface reinforcement layers, and are widely applied in industrial plants, warehousing and logistics centers, underground garages, parking lots, dock loading and unloading areas, equipment foundation areas, and other applications requiring high load-bearing capacity, impact resistance, wear resistance, and service life. Compared to ordinary concrete floors, these materials not only need to possess good workability, dispersibility, and construction adaptability in the early construction stages, but also need to have high compressive strength, flexural strength, surface density, and crack resistance after hardening to avoid problems such as sanding, dusting, accelerated wear, localized spalling, and crack propagation during long-term service.

[0003] With the increasing demand for green building materials and solid waste resource utilization, the use of industrial by-products such as steel slag and ore slag in cement-based wear-resistant materials is gradually gaining attention, with the aim of achieving high-value utilization of resources while reducing material costs.

[0004] CN104478351A discloses a type II cement-based wear-resistant material for concrete floors, using steel slag and corundum as wear-resistant aggregates to improve the material's compressive strength, impact resistance, and wear resistance. CN108101444A discloses a wear-resistant floor concrete slurry and its preparation method, using converter steel slag powder and electric furnace steel slag molding sand as cementitious component substitutes and wear-resistant aggregates, respectively, to improve the floor material's compressive strength, flexural strength, and wear resistance. CN107572969A discloses a marine sand ultra-high performance concrete and its preparation method, which improves the strength, density, and durability of marine sand concrete by introducing modified nano-silica dispersion, metakaolin, and chloride ion curing agent. CN106904911B discloses a marine sand corrosion-resistant marine concrete and its preparation method, which reduces chloride ion transport and improves the corrosion resistance of marine concrete by adjusting the proportion of cementitious materials and using an aggressive ion transport inhibition system. However, sea sand has insufficient surface activity and weak interfacial bonding with the cementing system. In actual use, it is still prone to problems such as surface wear and pulverization, microcrack propagation, interfacial peeling, and accelerated migration of chloride ions along pores and interfaces, making it difficult to achieve a coordinated improvement in strength, wear resistance and durability at the same time. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a cement-based wear-resistant material for concrete floors and a method for preparing the same, so as to improve the interfacial bonding performance between sea sand and cementitious system, improve the density and structural stability of the material matrix, and at the same time improve the flexural strength, compressive strength, wear resistance and chloride ion penetration resistance of the material.

[0006] To achieve the above objectives, the present invention provides a cement-based wear-resistant material for concrete floors and a method for preparing the same.

[0007] A method for preparing a cement-based wear-resistant material for concrete floors includes the following steps:

[0008] Step 1: The electric furnace steel slag is aged, impurities are removed, crushed and ground to obtain steel slag powder; then the steel slag powder is humidified and carbonized in a carbon dioxide atmosphere, and then dried and sieved to obtain pre-carbonized steel slag powder.

[0009] Step 2: Screening, washing, dechlorination, and drying of natural sea sand to obtain dechlorinated dry sea sand; surface modification treatment of the dechlorinated dry sea sand to obtain modified sea sand; the modified sea sand is at least one of dechlorinated mineralized sea sand and MgAl-LDH in-situ grown modified sea sand.

[0010] Step 3: Mix marine silicate cement, sulfoaluminate cement, pre-carbonized steel slag powder, slag powder, metakaolin, and silica fume to obtain a cementitious base material; then add polycarboxylate superplasticizer, redispersible latex powder, powdered silane water-repellent agent, cellulose ether, and defoamer to the cementitious base material, and continue mixing to obtain a cementitious premix.

[0011] Step 4: Granulate the gel premix under spray water addition conditions to obtain granulated gel reaction powder;

[0012] Step 5: Premix fused alumina, modified sea sand, basalt manufactured sand and basalt short-cut fibers, then add the granulated cementitious reaction powder and continue mixing to obtain cement-based wear-resistant material for concrete floors.

[0013] Preferably, in step 1, the steel slag powder obtained after grinding the electric furnace steel slag has a specific surface area of ​​460-490 m². 2 / kg; the moisture content of the conditioned steel slag powder is 9-10.5wt%; the material layer thickness during carbonization is 15-20mm; the carbonization temperature is 20-30℃, the carbon dioxide volume fraction is 25-35%, the relative humidity is 60-70%, and the carbonization time is 45-75min; the drying temperature after carbonization is 55-65℃, and the drying time is 1.5-2.5h; the sieve particle size is 90-110 mesh, thus obtaining the pre-carbonized steel slag powder;

[0014] Preferably, in step 2, during water washing and dechlorination, water with a mass of 1.8-2.2 times that of natural sea sand is added, the stirring time is 8-12 minutes each time, the standing time is 1-3 minutes, and the washing is repeated 2-3 times; the drying temperature after dechlorination is 100-110℃ until constant weight is achieved.

[0015] Preferably, the preparation method of the dechlorinated mineralized sea sand in step 2 is to mix silica sol, water, metakaolin and silica fume to prepare a mineralization coating slurry, and apply the mineralization coating slurry to the surface of the dechlorinated dry sea sand. After drying, mineralization treatment and drying again, the dechlorinated mineralized sea sand is obtained.

[0016] The mineralization coating slurry in step 2 comprises, by weight percentage, 55-65 wt% silica sol, 10-16 wt% metakaolin, and 4-10 wt% silica fume, with the balance being water; the amount of the mineralization coating slurry used is 10-18 wt% of the mass of the dechlorinated dry sea sand; the mixing time after coating is 3-6 min; the first drying temperature is 45-55℃, and the drying time is 1-2 h; the mineralization treatment temperature is 20-30℃, the carbon dioxide volume fraction is 25-35%, and the mineralization treatment time is 20-40 min; the second drying temperature is 55-65℃, and the drying time is 0.5-1.5 h, after which the moisture content of the sea sand is reduced to below 0.5 wt%;

[0017] Preferably, in step 3, the amount of marine silicate cement used is 30.5-33.6 kg, the amount of sulfoaluminate cement used is 7.9-10.4 kg, the amount of pre-carbonized steel slag powder used is 4.9-7.3 kg, the amount of slag powder used is 6.7-9.2 kg, the amount of metakaolin used is 3.1-4.9 kg, and the amount of silica fume used is 1.2-3.1 kg; the mixing process of the cementitious base material includes a first stage of high-speed mixing and a second stage of low-speed mixing, wherein the mixing speed of the first stage is 600-800 rpm and the mixing time is 3-5 min, and the mixing speed of the second stage is 300-500 rpm and the mixing time is 1-3 min;

[0018] Preferably, based on the total mass of the gelling base material, the amount of polycarboxylate superplasticizer added is 0.5-1.2 wt%, the amount of redispersible latex powder added is 1-2 wt%, the amount of powdered silane water-repellent agent added is 0.1-0.5 wt%, the amount of cellulose ether added is 0.03-0.15 wt%, and the amount of defoamer added is 0.03-0.15 wt%. After adding the above components, mixing continues, wherein the mixing speed in the first stage is 400-600 rpm and the mixing time is 2-4 min, and the mixing speed in the second stage is 200-400 rpm and the mixing time is 1-3 min, to obtain the gelling premix.

[0019] Preferably, in step 4, water of 4.5-5.8 wt% of the total mass of the gelling premix is ​​added by spraying, the granulation stirring speed is 300-400 rpm, the spraying time is 5-7 min, and the spray droplet size is 50-150 µm; after spraying, stirring is continued for 3-5 min to obtain wet granules with a particle size of 0.2-1 mm; the wet granules are dried at 55-65℃ for 1.5-2.5 h to reduce the particle moisture content to below 0.5 wt%, and then granulated through a 20-mesh sieve and an 80-mesh sieve, retaining particles with a particle size of 0.2-1 mm to obtain granulated gelling reaction powder;

[0020] Preferably, in step 5, based on the total mass of cement-based wear-resistant material for concrete floors, the content of granulated cementitious reactive powder is 60-66 wt%, the content of fused corundum is 8-12 wt%, the content of modified sea sand is 11-15 wt%, the content of basalt short-cut fibers is 0.1-0.5 wt%, and the balance is basalt manufactured sand; wherein, the particle size of the basalt manufactured sand is 0.15-0.6 mm, the length of the basalt short-cut fibers is 5-7 mm, and the diameter of the single filament is 9-17 µm; the premixing speed is 80-120 rpm, the premixing time is 1-3 min, and the mixing speed after adding the granulated cementitious reactive powder is 100-140 rpm, and the mixing time is 5-7 min;

[0021] Preferably, the preparation method of the MgAl-LDH in-situ grown modified sea sand in step 2 is to disperse the dechlorinated dry sea sand in water to form a suspension system, add a composite regulating liquid to the suspension system, and simultaneously add a metal salt mixture and an alkaline solution under alkaline conditions. After aging, washing, drying and granulation, the MgAl-LDH in-situ grown modified sea sand is obtained.

[0022] Preferably, when forming the suspension system, the amount of water added is 70-95 wt% of the mass of the dechlorinated dry sea sand; the stirring speed of the suspension system is 250-350 rpm, and the dispersion temperature is 55-65℃;

[0023] Preferably, in the metal salt mixture, Mg 2+ The concentration is 0.55-0.7 mol / L, Al 3+ The concentration is 0.28-0.35 mol / L; the magnesium source in the metal salt mixture is magnesium nitrate hexahydrate, and the aluminum source is aluminum nitrate nonahydrate;

[0024] Preferably, the concentration of sodium hydroxide in the alkaline solution is 1.6-2.2 mol / L, and the concentration of sodium nitrate is 0.8-1.2 mol / L;

[0025] Preferably, the amount of organic regulating component added to the composite regulating solution is 1-3 wt% of the mass of the dechlorinated dry sea sand, and the amount of alkaline regulating component added to the composite regulating solution is 0.5-1.5 wt% of the mass of the dechlorinated dry sea sand; the preparation temperature of the composite regulating solution is 70-78℃, the adjusted pH is 8.2-9, and the holding and stirring time is 15-25 min;

[0026] Preferably, the organic regulatory component includes an amino acid regulatory component and a dicarboxylic acid regulatory component; the amino acid regulatory component is L-aspartic acid; the dicarboxylic acid regulatory component is at least one of sebacic acid, adipic acid, or succinic acid; preferably, the organic regulatory component is a mixture of L-aspartic acid and sebacic acid in a mass ratio of 2:9-7:4.

[0027] Preferably, when the metal salt mixture and alkali solution are added dropwise simultaneously, the system temperature is 55-65℃, the stirring speed is 250-350rpm, the dropwise addition time is 50-70min, and the pH of the system is controlled at 9-10; after the dropwise addition is completed, the system is aged at 60-70℃ for 3-5h.

[0028] Preferably, after aging, the material is subjected to solid-liquid separation and washed until the pH of the filtrate is 6.5-7.5; then dried at 55-65℃ for 3-5 hours to reduce the moisture content to below 0.5wt%; after sieving and granulation, particles with a particle size of 0.1-0.8mm are retained to obtain MgAl-LDH in-situ grown modified sea sand.

[0029] The present invention also provides a cement-based wear-resistant material for concrete floors, wherein the cement-based wear-resistant material for concrete floors is prepared by the above-described preparation method.

[0030] This invention stabilizes and regulates the surface active mineral phase of electric furnace steel slag after moisture conditioning and carbonization. This reduces the adverse effects of free active components on the volume stability of the system and creates an active interface on the surface of the steel slag powder that is more conducive to subsequent cementation reactions. When combined with marine silicate cement, sulfoaluminate cement, slag powder, metakaolin, and silica fume to form a multi-component cementing system, a dense structure is formed by the interweaving of silicate hydration products, aluminate hydration products, and pozzolanic reaction products, thereby improving the matrix strength and refining the pore structure. Secondly, natural sea sand, after dechlorination treatment, has reduced harmful salt residues. After mineralization coating or in-situ modification with MgAl-LDH, its surface roughness, number of active sites, and interfacial affinity are improved. This enhances the mechanical interlocking and chemical bonding between the sea sand and the slurry, mitigating the problems of looseness, weakening, and susceptibility to microcracks in the interfacial transition zone. After spray granulation, the cementitious premix forms granulated cementitious reactive powder, enabling more uniform compounding of functional components at the microscale. This facilitates dispersion and encapsulation during construction and promotes the formation of granular reaction units that react gradually from the outside in during hydration, reducing local agglomeration and segregation. Finally, the granulated cementitious reactive powder is synergistically compounded with fused alumina, modified sea sand, basalt manufactured sand, and basalt chopped fibers. Fused alumina provides a high-hardness, wear-resistant skeleton, basalt manufactured sand optimizes particle packing, and chopped fibers inhibit shrinkage cracking and improve impact resistance. Therefore, while improving surface load-bearing capacity and wear resistance, it reduces the possibility of moisture and chloride ion migration along pores and interfaces, resulting in superior overall service performance.

[0031] L-Aspartic acid molecules contain amino and carboxyl groups, which can preferentially adsorb onto the surface of sea sand and around the initial magnesium-aluminum hydroxyl species, promoting the directional generation of crystal nuclei on the sea sand surface and improving the bonding ability between the modified layer and the matrix. Sebacic acid, with its dicarboxyl groups and long carbon chain structure, can flexibly regulate the growth rate, interlaminar spacing, and arrangement of LDH sheets, helping to reduce local agglomeration and form a more continuous and denser surface barrier layer. The synergistic effect of L-aspartic acid and sebacic acid gives the modified sea sand surface layer good bonding strength, structural integrity, and impermeability barrier function.

[0032] The beneficial effects of this invention are:

[0033] 1. Compared with the prior art, the present invention uses pre-carbonized steel slag powder to synergistically construct a multi-component cementitious system with marine silicate cement, sulfoaluminate cement, slag powder, metakaolin and silica fume. This not only helps to improve the mechanical properties of the material, but also helps to improve the density of the matrix and the structure of the interface transition zone, thereby improving the compressive strength and flexural strength of the final material.

[0034] 2. Compared with the existing technology, the present invention prepares the cementitious premix into granulated cementitious reaction powder, and then combines it with fused alumina, modified sea sand, basalt manufactured sand and basalt short chopped fiber, so that the material has both high wear resistance and good crack resistance stability, and is suitable for applications such as wear-resistant layers of concrete floors.

[0035] 3. This invention dechlorinates natural sea sand and further modulates the surface of the sea sand by mineralization coating or MgAl-LDH in-situ modification, which can effectively improve the surface state of the sea sand and the interfacial bonding between it and the cement-based cementitious system, thereby improving the uniformity and stability of the overall structure of the material. Detailed Implementation

[0036] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0037] Natural sea sand, also known as untreated sea sand, contains 0.06-0.09 wt% chloride, has a fineness modulus of 1.8-2.2, and an apparent density of 2500-2700 kg / m³. 3 ;

[0038] Silica sol, ZXS-30, Wenzhou Zhanxin New Materials Co., Ltd.;

[0039] Silica fume, with a silica content of not less than 92 wt%, an average particle size of not more than 1 µm, and a loss on ignition of not more than 6 wt%;

[0040] Marine silicate cement, Shanshui Dongyue brand P·O·P42.5 marine silicate cement, Shandong Shanshui Cement Group Co., Ltd.;

[0041] Sulfoaluminate cement, 42.5 rapid-hardening sulfoaluminate cement, Guangxi Yunyan Special Cement Building Materials Co., Ltd.;

[0042] The slag powder used is S95 grade slag powder;

[0043] Polycarboxylate superplasticizer, ViscoCrete-225 P, Sika;

[0044] Redispersible latex powder, VINNAPAS ® 5044N, Wacker Chemie AG;

[0045] Powdered silane hydrophobic agent, SILRES ®POWDER D, Wacker Chemie AG;

[0046] cellulose ether, LANDERCOLL ® K150, Shandong Landu New Materials Co., Ltd.;

[0047] Defoamer, P805, Shandong Landu New Materials Co., Ltd.;

[0048] The chemical composition of fused alumina, by mass percentage, is: 95.2% Al2O3, 0.68% SiO2, 0.18% Fe2O3, 2.76% TiO2, 0.41% CaO, 0.29% MgO, 0.06% K2O, 0.09% Na2O, with the balance being unavoidable impurities;

[0049] Manufactured basalt sand with a particle size of 0.15-0.6 mm;

[0050] Basalt short-cut fibers, 6 mm in length, with a single filament diameter of 9-17 µm.

[0051] Other raw materials not mentioned are all common raw materials. The above content is only for the purpose of illustrating the present invention and should not be construed as a strict limitation of the present invention. Those skilled in the art can directly purchase the same / similar raw materials from the market or prepare them themselves.

[0052] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Example 1

[0054] A method for preparing a cement-based wear-resistant material for concrete floors includes the following steps:

[0055] Step 1: The electric furnace steel slag is aged, impurities removed, crushed, and ground to obtain a specific surface area of ​​460-490 m². 2 / kg of steel slag powder was placed in a horizontal mixer, and water was added by spraying to adjust the moisture content of the steel slag powder to about 9.5wt%. After spraying, the mixture was stirred for another 5 minutes. The moistened steel slag powder was then spread evenly on a stainless steel tray with a layer thickness of 15-20mm and sent into a carbonization box. Carbonization was carried out for 60 minutes at a temperature of 25℃, a carbon dioxide volume fraction of 30%, and a relative humidity of 65%. After carbonization, the material was sent to a forced-air drying oven and dried at 60℃ for 2 hours to reduce the moisture content to below 0.5wt%. Finally, the powder was sieved through a 100-mesh sieve to obtain pre-carbonized steel slag powder.

[0056] Step 2: Take 12.35 kg of natural sea sand and pass it through a 20-mesh sieve and an 80-mesh sieve, retaining the portion with a particle size of 0.1-0.8 mm; add the sieved sea sand to a washing tank, add 24.7 kg of water, stir for 10 minutes, let stand for 2 minutes, and remove the supernatant; repeat the washing process once more. Dry the washed sea sand at 105℃ to constant weight to obtain dechlorinated dry sea sand; mix 1 kg of silica sol (ZXS-30, Wenzhou Zhanxin New Material Co., Ltd.) with 0.35 kg of water and stir evenly for 2 minutes, then... Add 0.2 kg metakaolin and 0.1 kg silica fume, and continue stirring for 8 minutes to obtain a mineralized coating slurry. Spray the above mineralized coating slurry evenly onto the surface of 12.35 kg of dechlorinated dry sea sand. After spraying, continue stirring for 5 minutes, then place it in a 50℃ forced-air oven to dry for 1.5 hours. Then transfer it to a carbonization box and mineralize it for 30 minutes at a temperature of 25℃ and a carbon dioxide volume fraction of 30%. Finally, dry it at 60℃ for 1 hour to reduce the moisture content to below 0.5 wt% to obtain dechlorinated mineralized sea sand.

[0057] Step 3: Weigh 32 kg of marine silicate cement, 9 kg of sulfoaluminate cement, 6 kg of pre-carbonized steel slag powder, 8 kg of slag powder, 4 kg of metakaolin, and 2 kg of silica fume and add them to a high-speed dry powder mixer. Mix at 700 rpm for 4 minutes, then at 400 rpm for 2 minutes to obtain a uniform cementitious base. Then add 0.5 kg of polycarboxylate superplasticizer (ViscoCrete-225 P, Sika) and 1 kg of redispersible latex powder (VINNAPAS) to the cementitious base. ® 5044N, Wacker Chemie AG), 0.2 kg powdered silane hydrophobic agent (SILRES) ® POWDER D (Wacker Chemicals AG), 0.05 kg cellulose ether (LANDERCOLL) ® K150 (Shandong Landu New Material Co., Ltd.) and 0.05 kg of defoamer (P805, Shandong Landu New Material Co., Ltd.) were mixed at 500 rpm for 3 min, and then at 300 rpm for 2 min to obtain the gel premix.

[0058] Step 4: Add the above 62.8 kg of gel premix to a vertical granulator. Under the condition of stirring speed of 350 rpm, add 3.2 kg of water by spraying for 6 min, and control the spray particle size to 50-150 µm. After spraying, continue stirring for 4 min to obtain wet granules with a particle size of 0.2-1 mm. Transfer the wet granules to a 60℃ hot air circulating oven and dry for 2 h to reduce the particle moisture content to below 0.5 wt%. Then, granulate the granules through a 20-mesh sieve and an 80-mesh sieve, retaining particles with a particle size of 0.2-1 mm to obtain granulated gel reaction powder.

[0059] Step 5: Weigh 10 kg of fused alumina, 13 kg of dechlorinated mineralized sea sand, 14 kg of basalt manufactured sand and 0.2 kg of basalt short-cut fiber, and premix at 100 rpm for 2 min to ensure uniform dispersion of aggregate and fiber; while maintaining the above stirring state, add 62.8 kg of the above granulated cementitious reaction powder and continue mixing at 120 rpm for 6 min; after mixing, sieve through a 20-mesh sieve to remove agglomerated particles to obtain cement-based wear-resistant material for concrete floors.

[0060] Example 2

[0061] A method for preparing a cement-based wear-resistant material for concrete floors includes the following steps:

[0062] Step 1: The electric furnace steel slag is aged, impurities removed, crushed, and ground to obtain a specific surface area of ​​460-490 m². 2 / kg of steel slag powder was placed in a horizontal mixer, and water was added by spraying to adjust the moisture content of the steel slag powder to about 9.5wt%. After spraying, the mixture was stirred for another 5 minutes. The moistened steel slag powder was then spread evenly on a stainless steel tray with a layer thickness of 15-20mm and sent into a carbonization box. Carbonization was carried out for 60 minutes at a temperature of 25℃, a carbon dioxide volume fraction of 30%, and a relative humidity of 65%. After carbonization, the material was sent to a forced-air drying oven and dried at 60℃ for 2 hours to reduce the moisture content to below 0.5wt%. Finally, the powder was sieved through a 100-mesh sieve to obtain pre-carbonized steel slag powder.

[0063] Step 2: Take 12.35 kg of natural sea sand and pass it through a 20-mesh sieve and an 80-mesh sieve, retaining the portion with a particle size of 0.1-0.8 mm. Add the sieved sea sand to a washing tank, add 24.7 kg of water, stir for 10 min, let stand for 2 min, and remove the supernatant. Repeat the washing once more. Dry the washed sea sand at 105℃ to constant weight to obtain dechlorinated dry sea sand. Add 12.35 kg of the above dechlorinated dry sea sand to 10 kg of water and mix evenly. Heat to 60℃ and stir at 300 rpm to form a uniform sea sand suspension system. Then add composite regulating solution C and continue stirring for 15 min. While maintaining 60℃ and 300 rpm, simultaneously add metal salt mixture A and alkali solution B, controlling the adding time to 60 min and controlling the pH of the system at 9.5. After the adding is completed, continue aging at 65℃ for 4 h. After aging, filter and separate the material, wash with water until the pH of the filtrate is 7, and then dry at 60℃. The mixture is dried for 4 hours to reduce the moisture content to below 0.5 wt%, then granulated through a 20-mesh sieve and an 80-mesh sieve, retaining particles with a diameter of 0.1-0.8 mm to obtain modified sea sand. The metal salt mixture A is prepared as follows: 1.28 kg of magnesium nitrate hexahydrate and 0.94 kg of aluminum nitrate nonahydrate are dissolved in water and the volume is adjusted to 8 L to obtain a metal salt mixture A with a Mg / Al molar ratio of approximately 2:1. The alkali solution B is prepared as follows: 0.64 kg of sodium hydroxide and 0.68 kg of sodium nitrate are dissolved in water and the volume is adjusted to 8 L to obtain alkali solution B. The composite regulating solution C is prepared as follows: 0.22 kg of organic regulating component is added to 4 kg of water and heated to 74°C under stirring; then 0.11 kg of sodium hydroxide is added in batches to adjust and stabilize the pH of the system at 8.6, and the mixture is kept warm and stirred for 20 min to obtain composite regulating solution C. The organic regulating component is a mixture of L-aspartic acid and sebacic acid in a mass ratio of 4:7.

[0064] Step 3: Weigh 32 kg of marine silicate cement, 9 kg of sulfoaluminate cement, 6 kg of pre-carbonized steel slag powder, 8 kg of slag powder, 4 kg of metakaolin, and 2 kg of silica fume. Add them to a high-speed dry powder mixer and mix at 700 rpm for 4 minutes, then at 400 rpm for 2 minutes to obtain a uniform cementitious base. Subsequently, add 0.5 kg of polycarboxylate superplasticizer (ViscoCrete-225 P, Sika) and 1 kg of redispersible latex powder (VINNAPAS) to the cementitious base. ® 5044N, Wacker Chemie AG), 0.2 kg powdered silane hydrophobic agent (SILRES) ® POWDER D (Wacker Chemicals AG), 0.05 kg cellulose ether (LANDERCOLL) ®K150 (Shandong Landu New Material Co., Ltd.) and 0.05 kg of defoamer (P805, Shandong Landu New Material Co., Ltd.) were mixed at 500 rpm for 3 min, and then at 300 rpm for 2 min to obtain the gel premix.

[0065] Step 4: Add the above 62.8 kg of gel premix to a vertical granulator. Under the condition of stirring speed of 350 rpm, add 3.2 kg of water by spraying for 6 min, and control the spray particle size to 50-150 µm. After spraying, continue stirring for 4 min to obtain wet granules with a particle size of 0.2-1 mm. Transfer the wet granules to a 60℃ hot air circulating oven and dry for 2 h to reduce the particle moisture content to below 0.5 wt%. Then, granulate through a 20-mesh sieve and an 80-mesh sieve, retaining particles with a particle size of 0.2-1 mm to obtain granulated gel reaction powder.

[0066] Step 5: Weigh 10 kg of fused alumina, 13 kg of modified sea sand obtained in Step 2, 14 kg of basalt manufactured sand, and 0.2 kg of basalt short-cut fibers. Premix at 100 rpm for 2 minutes to ensure uniform dispersion of aggregates and fibers. While maintaining the above stirring state, add 62.8 kg of the above granulated cementitious reaction powder and continue mixing at 120 rpm for 6 minutes. After mixing, sieve through a 20-mesh sieve to remove agglomerated particles and obtain cement-based wear-resistant material for concrete floors.

[0067] Example 3

[0068] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is L-aspartic acid.

[0069] Example 4

[0070] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is sebacic acid.

[0071] Example 5

[0072] A method for preparing a cement-based wear-resistant material for concrete floors includes the following steps:

[0073] Step 1: The electric furnace steel slag is aged, impurities removed, crushed, and ground to obtain a specific surface area of ​​460-490 m². 2 / kg of steel slag powder was placed in a horizontal mixer, and water was added by spraying to adjust the moisture content of the steel slag powder to about 9.5wt%. After spraying, the mixture was stirred for another 5 minutes. The moistened steel slag powder was then spread evenly on a stainless steel tray with a layer thickness of 15-20mm and sent into a carbonization box. Carbonization was carried out for 60 minutes at a temperature of 25℃, a carbon dioxide volume fraction of 30%, and a relative humidity of 65%. After carbonization, the material was sent to a forced-air drying oven and dried at 60℃ for 2 hours to reduce the moisture content to below 0.5wt%. Finally, the powder was sieved through a 100-mesh sieve to obtain pre-carbonized steel slag powder.

[0074] Step 2: Take 12.35 kg of natural sea sand and pass it through a 20-mesh sieve and an 80-mesh sieve, retaining the portion with a particle size of 0.1-0.8 mm. Add the sieved sea sand to a washing tank, add 24.7 kg of water, stir for 10 minutes, let stand for 2 minutes, and remove the supernatant. Repeat the washing process once more. Dry the washed sea sand at 105℃ to constant weight to obtain dechlorinated dry sea sand. Add 12.35 kg of the above dechlorinated dry sea sand to 10 kg of water and mix evenly. Heat to 60℃ and stir at 300 rpm to form a uniform sea sand suspension system. While maintaining 60℃ and 300 rpm, simultaneously add metal salt mixture A and alkali solution B, controlling the addition time to 60 minutes, and control the pH of the system at a certain level. 9.5. After the addition is complete, continue aging at 65℃ for 4 hours. After aging, filter and separate the material, wash with water until the pH of the filtrate is 7, then dry at 60℃ for 4 hours to reduce the moisture content to below 0.5wt%. Then, granulate through a 20-mesh sieve and an 80-mesh sieve, retaining the portion with a particle size of 0.1-0.8mm to obtain modified sea sand. The preparation method of the metal salt mixture A is as follows: weigh 1.28kg of magnesium nitrate hexahydrate and 0.94kg of aluminum nitrate nonahydrate, add them to water, dissolve, and make up to 8L to obtain metal salt mixture A with a Mg / Al molar ratio of approximately 2:1. The preparation method of the alkali solution B is as follows: weigh 0.64kg of sodium hydroxide and 0.68kg of sodium nitrate, add them to water, dissolve, and make up to 8L to obtain alkali solution B.

[0075] Step 3: Weigh 32 kg of marine silicate cement, 9 kg of sulfoaluminate cement, 6 kg of pre-carbonized steel slag powder, 8 kg of slag powder, 4 kg of metakaolin, and 2 kg of silica fume. Add them to a high-speed dry powder mixer and mix at 700 rpm for 4 minutes, then at 400 rpm for 2 minutes to obtain a uniform cementitious base. Subsequently, add 0.5 kg of polycarboxylate superplasticizer (ViscoCrete-225 P, Sika) and 1 kg of redispersible latex powder (VINNAPAS) to the cementitious base. ® 5044N, Wacker Chemie AG), 0.2 kg powdered silane hydrophobic agent (SILRES) ®POWDER D (Wacker Chemicals AG), 0.05 kg cellulose ether (LANDERCOLL) ® K150 (Shandong Landu New Material Co., Ltd.) and 0.05 kg of defoamer (P805, Shandong Landu New Material Co., Ltd.) were mixed at 500 rpm for 3 min, and then at 300 rpm for 2 min to obtain the gel premix.

[0076] Step 4: Add the above 62.8 kg of gel premix to a vertical granulator. Under the condition of stirring speed of 350 rpm, add 3.2 kg of water by spraying for 6 min, and control the spray particle size to 50-150 µm. After spraying, continue stirring for 4 min to obtain wet granules with a particle size of 0.2-1 mm. Transfer the wet granules to a 60℃ hot air circulating oven and dry for 2 h to reduce the particle moisture content to below 0.5 wt%. Then, granulate through a 20-mesh sieve and an 80-mesh sieve, retaining particles with a particle size of 0.2-1 mm to obtain granulated gel reaction powder.

[0077] Step 5: Weigh 10 kg of fused alumina, 13 kg of modified sea sand obtained in Step 2, 14 kg of basalt manufactured sand, and 0.2 kg of basalt short-cut fibers. Premix at 100 rpm for 2 minutes to ensure uniform dispersion of aggregates and fibers. While maintaining the above stirring state, add 62.8 kg of the above granulated cementitious reaction powder and continue mixing at 120 rpm for 6 minutes. After mixing, sieve through a 20-mesh sieve to remove agglomerated particles and obtain cement-based wear-resistant material for concrete floors.

[0078] Example 6

[0079] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is composed of L-aspartic acid and sebacic acid mixed in a mass ratio of 2:9. Example 7

[0080] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is composed of L-aspartic acid and sebacic acid mixed in a mass ratio of 6:5.

[0081] Example 8

[0082] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is composed of L-aspartic acid and sebacic acid mixed in a mass ratio of 7:4.

[0083] Example 9

[0084] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is composed of L-aspartic acid and adipic acid mixed in a mass ratio of 4:7.

[0085] Example 10

[0086] A method for preparing a cement-based wear-resistant material for concrete floors is basically the same as that in Example 2, except that the organic regulating component is composed of L-aspartic acid and succinic acid mixed in a mass ratio of 4:7.

[0087] Comparative Example 1

[0088] A method for preparing a cement-based wear-resistant material for concrete floors includes the following steps:

[0089] Step 1: The electric furnace steel slag is aged, impurities removed, crushed, and ground to obtain a specific surface area of ​​460-490 m². 2 / kg of steel slag powder was placed in a horizontal mixer, and water was added by spraying to adjust the moisture content of the steel slag powder to about 9.5wt%. After spraying, the mixture was stirred for another 5 minutes. The moistened steel slag powder was then spread evenly on a stainless steel tray with a layer thickness of 15-20mm and sent into a carbonization box. Carbonization was carried out for 60 minutes at a temperature of 25℃, a carbon dioxide volume fraction of 30%, and a relative humidity of 65%. After carbonization, the material was sent to a forced-air drying oven and dried at 60℃ for 2 hours to reduce the moisture content to below 0.5wt%. Finally, the powder was sieved through a 100-mesh sieve to obtain pre-carbonized steel slag powder.

[0090] Step 2: Take 12.35 kg of natural sea sand and pass it through a 20-mesh sieve and an 80-mesh sieve, retaining the portion with a particle size of 0.1-0.8 mm; add the sieved sea sand to a washing tank, add 24.7 kg of water, stir for 10 minutes, let stand for 2 minutes, and remove the supernatant; repeat the washing once more, and dry the washed sea sand at 105℃ to constant weight to obtain dechlorinated dry sea sand;

[0091] Step 3: Weigh 32 kg of marine silicate cement, 9 kg of sulfoaluminate cement, 6 kg of pre-carbonized steel slag powder, 8 kg of slag powder, 4 kg of metakaolin, and 2 kg of silica fume. Add them to a high-speed dry powder mixer and mix at 700 rpm for 4 minutes, then at 400 rpm for 2 minutes to obtain a uniform cementitious base. Then add 0.5 kg of polycarboxylate superplasticizer (ViscoCrete-225 P, Sika), 1 kg of redispersible latex powder (VINNAPAS® 5044N, Wacker Chemie AG), 0.2 kg of powdered silane water repellent (SILRES® POWDER D, Wacker Chemie AG), 0.05 kg of cellulose ether (LANDERCOLL® K150, Shandong Landu New Materials Co., Ltd.), and 0.05 kg of defoamer (P805, Shandong Landu New Materials Co., Ltd.) to the cementitious base. Continue mixing at 500 rpm for 3 minutes, then at 300 rpm for 2 minutes to obtain a cementitious premix.

[0092] Step 4: Add the above 62.8 kg of gel premix to a vertical granulator. Under the condition of stirring speed of 350 rpm, add 3.2 kg of water by spraying for 6 min, and control the spray particle size to 50-150 µm. After spraying, continue stirring for 4 min to obtain wet granules with a particle size of 0.2-1 mm. Transfer the wet granules to a 60℃ hot air circulating oven and dry for 2 h to reduce the particle moisture content to below 0.5 wt%. Then, granulate the granules through a 20-mesh sieve and an 80-mesh sieve, retaining particles with a particle size of 0.2-1 mm to obtain granulated gel reaction powder.

[0093] Step 5: Weigh 10 kg of fused alumina, 13 kg of dechlorinated dry sea sand obtained in Step 2, 14 kg of basalt manufactured sand, and 0.2 kg of basalt short-cut fibers. Premix at 100 rpm for 2 minutes to ensure uniform dispersion of aggregates and fibers. While maintaining the above stirring state, add 62.8 kg of the above granulated cementitious reaction powder and continue mixing at 120 rpm for 6 minutes. After mixing, sieve through a 20-mesh sieve to remove agglomerated particles and obtain cement-based wear-resistant material for concrete floors.

[0094] Test Example 1

[0095] Cement-based wear-resistant materials for concrete floors prepared in the examples and comparative examples were mixed with water at a material-to-water ratio of 100:12 for 3 minutes, poured into 40mm×40mm×160mm molds, vibrated and compacted, demolded after 24 hours, and cured under standard conditions at 20±2℃ and relative humidity not less than 95% for 28 days. Flexural strength and compressive strength were tested according to GB / T 17671-2021 "Test Method for Strength of Cement Mortar (ISO Method)".

[0096] Table 1. Test results of flexural and compressive strength of cement-based wear-resistant materials for concrete floors.

[0097] Example 1 11.7 80.1 Example 2 13.1 87.3 Example 3 12.5 84.6 Example 4 12.1 83.7 Example 5 12.0 82.5 Example 6 12.2 84.0 Example 7 12.7 86.2 Example 8 12.4 85.1 Example 9 12.5 85.4 Example 10 12.3 84.8 Comparative Example 1 10.7 73.2

[0098] Test Example 2

[0099] Materials prepared in the examples and comparative examples were mixed with water at a material-to-water mass ratio of 100:12 and then formed into 150mm×150mm×30mm plate-shaped specimens. After standard curing for 28 days, the specimens were tested according to GB / T 12988-2009 "Test Method for Abrasion Resistance of Inorganic Flooring Materials". The abrasion resistance was characterized by the length of the abrasion pit. The smaller the abrasion pit length, the better the abrasion resistance.

[0100] Table 2. Test results of wear resistance of cement-based wear-resistant materials for concrete floors

[0101] Example 1 25.8 Example 2 20.9 Example 3 23.6 Example 4 22.8 Example 5 24.3 Example 6 22.3 Example 7 21.6 Example 8 22.4 Example 9 21.9 Example 10 22.2 Comparative Example 1 29.7

[0102] Test Example 3

[0103] Materials prepared in the examples and comparative examples were used to prepare samples under the same material-to-water ratio and curing conditions as in Test Example 1. The samples were molded using circular molds with a diameter of 100 mm and a thickness of 50 mm. The samples were demolded after 24 hours and cured under standard conditions at 20±2℃ and a relative humidity of not less than 95% for 28 days. Subsequently, tests were conducted according to ASTM C1202, using the cumulative electrical flux over 6 hours to characterize the material's resistance to chloride ion penetration. A lower electrical flux indicates stronger resistance to chloride ion penetration.

[0104] Table 3. Test results of chloride ion penetration resistance of cement-based wear-resistant materials for concrete floors.

[0105] Example 1 2390 Example 2 980 Example 3 1490 Example 4 1310 Example 5 1710 Example 6 1240 Example 7 1090 Example 8 1210 Example 9 1140 Example 10 1190 Comparative Example 1 3210

[0106] As shown in Tables 1-3, in Comparative Example 1, only the natural sea sand was washed and dechlorinated, without mineralization coating or MgAl-LDH modification. Therefore, the 28d flexural strength, 28d compressive strength, wear resistance and chloride ion penetration resistance of the obtained material were all at a low level, indicating that dechlorination alone is not enough to significantly improve the surface condition of the sea sand and its interfacial bonding with the cementing system.

[0107] In Example 1, after surface treatment of dechlorinated sea sand using silica sol mineralization coating, the flexural strength and compressive strength of the resulting material were improved compared to Comparative Example 1, while the grinding pit length and 6-hour cumulative electrical flux were reduced. This indicates that mineralization coating treatment can improve the surface activity of sea sand and its interfacial compatibility with the cementitious matrix to a certain extent, thereby improving the mechanical properties and durability of the final material.

[0108] Example 5 involves in-situ modification of sea sand using only MgAl-LDH without the addition of organic modifiers. Compared to Example 1, the pit length and electrical flux of Example 5 are further reduced, indicating that in-situ growth treatment with MgAl-LDH helps reduce water migration at the interface and improve the material's resistance to chloride ion penetration. However, its overall performance is still lower than that of Example 2, suggesting that relying solely on MgAl-LDH modification is insufficient to achieve the optimal balance between interface strengthening and water barrier control.

[0109] Examples 3 and 4 used L-aspartic acid and sebacic acid as organic regulating components, respectively. As shown in Tables 1-3, the flexural and compressive strengths of Example 3 were higher than those of Example 4, indicating that L-aspartic acid is more beneficial in improving the interfacial bonding and mechanical synergy between the modified sea sand and the cementitious system. Conversely, the pit length and electrical flux of Example 4 were lower than those of Example 3, indicating that sebacic acid is more effective in inhibiting chloride ion migration. These results suggest that L-aspartic acid and sebacic acid have different roles in this system; the former is more inclined towards enhancing interfacial bonding and mechanical synergy, while the latter is more inclined towards regulating wear resistance and impermeability.

[0110] Example 2 uses L-aspartic acid and sebacic acid in a mass ratio of 4:7 as organic regulating components. As shown in Tables 1-3, Example 2 exhibits the highest 28-day flexural strength and 28-day compressive strength among all groups, while the lowest indentation length and 6-hour cumulative electrical flux. This indicates that L-aspartic acid and sebacic acid are not simply substitutes, but rather play interfacial regulating and interlayer synergistic roles respectively during the in-situ modification of MgAl-LDH. The combination of these two components allows the final material to achieve a better balance between strength, wear resistance, and durability, thus demonstrating outstanding comprehensive technical effects.

[0111] Examples 6-8 further demonstrate that the ratio of L-aspartic acid to sebacic acid significantly affects the final performance. When the proportion of L-aspartic acid is low and the proportion of sebacic acid is high, although the electrical flux remains at a low level, the flexural strength and compressive strength are not sufficiently improved. When the proportion of L-aspartic acid is high and the proportion of sebacic acid is low, although the strength remains high, the electrical flux increases. Only when the two are compounded in a 4:7 mass ratio does the resulting material achieve a better balance between flexural strength, compressive strength, abrasion resistance, and chloride ion penetration resistance, demonstrating a more outstanding comprehensive technical effect.

[0112] Examples 9-10 replaced sebacic acid with adipic acid and succinic acid, respectively, while maintaining a mass ratio of 4:7 with L-aspartic acid. As shown in Tables 1-3, the overall performance of Examples 9-10 was lower than that of Example 2, indicating that in this system, sebacic acid is more conducive to forming an effective organic regulatory layer than adipic acid and succinic acid, thus better reducing wear and inhibiting chloride ion penetration. This further proves that the 4:7 mass ratio of L-aspartic acid to sebacic acid has a superior synergistic effect.

[0113] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A method for preparing a cement-based wear-resistant material for concrete floors, characterized in that, Includes the following steps: Step 1: The electric furnace steel slag is aged, impurities are removed, crushed and ground to obtain steel slag powder; then the steel slag powder is humidified and carbonized in a carbon dioxide atmosphere, and then dried and sieved to obtain pre-carbonized steel slag powder. Step 2: Screening, washing, dechlorination, and drying of natural sea sand to obtain dechlorinated dry sea sand; surface modification treatment of dechlorinated dry sea sand to obtain modified sea sand. Step 3: Mix marine silicate cement, sulfoaluminate cement, pre-carbonized steel slag powder, slag powder, metakaolin, and silica fume to obtain a cementitious base material; then add polycarboxylate superplasticizer, redispersible latex powder, powdered silane water-repellent agent, cellulose ether, and defoamer to the cementitious base material, and continue mixing to obtain a cementitious premix. Step 4: Granulate the gel premix under spray water addition conditions to obtain granulated gel reaction powder; Step 5: Premix fused alumina, modified sea sand, basalt manufactured sand and basalt short chopped fiber, then add the granulated cementitious reaction powder and continue mixing to obtain cement-based wear-resistant material for concrete flooring. The modified sea sand is at least one of dechlorinated mineralized sea sand and MgAl-LDH in-situ grown modified sea sand.

2. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 1, characterized in that: The method for preparing the dechlorinated mineralized sea sand is to mix silica sol, water, metakaolin and silica fume to prepare a mineralization coating slurry, apply the mineralization coating slurry to the surface of the dechlorinated dry sea sand, and obtain the dechlorinated mineralized sea sand after drying, mineralization treatment and drying again.

3. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 1, characterized in that: The method for preparing MgAl-LDH in-situ grown modified sea sand involves dispersing dechlorinated dry sea sand in water to form a suspension system, adding a composite regulating liquid to the suspension system, and adding a metal salt mixture and an alkaline solution under alkaline conditions. After aging, washing, drying and granulation, MgAl-LDH in-situ grown modified sea sand is obtained.

4. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 3, characterized in that: The composite regulating solution includes organic regulating components and alkaline regulating components; the organic regulating components include amino acid regulating components and dicarboxylic acid regulating components.

5. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 4, characterized in that: The amino acid regulating component is L-aspartic acid; the dicarboxylic acid regulating component is at least one of sebacic acid, adipic acid, or succinic acid.

6. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 1, characterized in that: The steel slag powder obtained by grinding the electric furnace steel slag in step 1 has a specific surface area of ​​460-490 m². 2 / kg; the moisture content of the conditioned steel slag powder is 9-10.5wt%; the material layer thickness during carbonization is 15-20mm; the carbonization temperature is 20-30℃, the carbon dioxide volume fraction is 25-35%, the relative humidity is 60-70%, and the carbonization time is 45-75min; the drying temperature after carbonization is 55-65℃, and the drying time is 1.5-2.5h; the sieve particle size is 90-110 mesh, thus obtaining the pre-carbonized steel slag powder.

7. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 2, characterized in that: The mineralization coating slurry in step 2 comprises, by weight percentage, 55-65 wt% silica sol, 10-16 wt% metakaolin, and 4-10 wt% silica fume, with the balance being water; the amount of the mineralization coating slurry used is 10-18 wt% of the mass of the dechlorinated dry sea sand; the mixing time after coating is 3-6 min; the first drying temperature is 45-55℃, and the drying time is 1-2 h; the mineralization treatment temperature is 20-30℃, the carbon dioxide volume fraction is 25-35%, and the mineralization treatment time is 20-40 min; the second drying temperature is 55-65℃, and the drying time is 0.5-1.5 h, after which the moisture content of the sea sand is reduced to below 0.5 wt%.

8. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 1, characterized in that: In step 3, the amount of marine silicate cement used is 30.5-33.6 kg, the amount of sulfoaluminate cement used is 7.9-10.4 kg, the amount of pre-carbonized steel slag powder used is 4.9-7.3 kg, the amount of slag powder used is 6.7-9.2 kg, the amount of metakaolin used is 3.1-4.9 kg, and the amount of silica fume used is 1.2-3.1 kg. The mixing process of the cementitious base material includes a first stage of high-speed mixing and a second stage of low-speed mixing. The mixing speed of the first stage is 600-800 rpm and the mixing time is 3-5 min. The mixing speed of the second stage is 300-500 rpm and the mixing time is 1-3 min.

9. The method for preparing cement-based wear-resistant material for concrete floors as described in claim 1, characterized in that: In step 5, based on the total mass of cement-based wear-resistant material for concrete floors, the content of granulated cementitious reactive powder is 60-66 wt%, the content of fused corundum is 8-12 wt%, the content of modified sea sand is 11-15 wt%, the content of basalt short-cut fiber is 0.1-0.5 wt%, and the balance is basalt manufactured sand; wherein, the particle size of basalt manufactured sand is 0.15-0.6 mm, the length of basalt short-cut fiber is 5-7 mm, and the diameter of a single filament is 9-17 µm; the premixing speed is 80-120 rpm, the premixing time is 1-3 min, and the mixing speed after adding granulated cementitious reactive powder is 100-140 rpm, and the mixing time is 5-7 min.

10. A cement-based wear-resistant material for concrete floors, characterized in that, It is prepared by the preparation method described in any one of claims 1-9.