Green intelligent fireproof concrete and preparation method thereof

Abstract

The application discloses green intelligent fireproof concrete and a preparation method thereof. The concrete is prepared from the following components in parts by weight: cement 400-450 parts, rice husk ash 50-100 parts, fire early warning aerogel powder 50-100 parts, waste tire steel fiber 6-10 parts, conductive ceramic 1400-1450 parts, water 250 parts, silver nanowire suspension 60-80 parts, compensation agent 20-24 parts, thickening agent 1-3 parts, coupling agent 1-2 parts, defoaming agent 2 parts, and waterproof agent 10-14 parts. The application has the advantages of early fire early warning function, super high fire resistance, good fire resistance, ideal fireproof effect under high temperature, quick response to fire or high temperature, and fire alarm without relying on external early warning systems, and good flexibility.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and in particular to a green and intelligent fireproof concrete and its preparation method. Background Technology

[0002] Intelligentization has become the mainstream of modern social development, and this is also true in the construction industry. Intelligent buildings are emerging in large numbers, and the level of intelligent application in buildings is constantly improving. Intelligent buildings have entered a transitional stage from quantitative change to qualitative change. The increasing level of building intelligence also means rising electricity consumption by residents, leading to more and more safety hazards. To protect the lives and property of residents, it is crucial to focus on building intelligent building safety systems. Automatic fire alarm systems, as the most important component of these systems, must be strictly implemented to ensure they function effectively in the event of an accident.

[0003] Many combustible materials (such as fibers, foams, and wood) are widely used in structural and decorative engineering. However, most of these materials are flammable, posing significant fire safety hazards. Furthermore, these materials cannot respond to environmental changes during a fire, requiring external early warning systems for fire alarms. Common traditional fire alarms often have slow response times (>100 seconds) and poor durability, and are typically triggered by high-temperature smoke, making it difficult to provide early warning and continuous alerts during a fire, thus causing trapped individuals to miss their best escape opportunity. To reduce the occurrence of fire accidents and mitigate their harmful consequences, adopting efficient and feasible fire early warning and flame-retardant measures is essential.

[0004] Therefore, researching green and intelligent fireproof concrete with extremely early fire warning function and ultra-high flame retardant performance is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The present invention aims to address the shortcomings of the prior art by providing a green and intelligent fireproof concrete and its preparation method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a green intelligent fireproof concrete, which is composed of the following components by weight proportions: 400-450 parts cement, 50-100 parts rice husk ash, 50-100 parts fire early warning aerogel powder, 6-10 parts waste tire steel fiber, 1400-1450 parts conductive ceramic, 250 parts water, 60-80 parts silver nanowire suspension, 20-24 parts compensating agent, 1-3 parts thickener, 1-2 parts coupling agent, 2 parts defoamer, and 10-14 parts waterproofing agent.

[0007] Specifically, the preparation method of fire early warning aerogel powder includes the following steps:

[0008] S1, Degreasing of precursor straw;

[0009] S11. Immerse 10g of precursor straw powder and 5g of urea in 100ml of anhydrous ethanol at 75℃ with magnetic stirring for 6 hours to obtain mixture A;

[0010] S12. Freeze-dry mixture A for 24 hours using a freeze dryer to obtain modified straw powder;

[0011] S2, encapsulated with polyethylene glycol;

[0012] Polyethylene glycol was encapsulated into the microtubular structure of modified straw powder by impregnation, and then freeze-dried to obtain polyethylene glycol encapsulated with modified straw powder.

[0013] S3, preparation of amino-functionalized carbon nanotube suspension;

[0014] S31. Mix 0.1g of amino-functionalized carbon nanotubes, 0.1g of sodium dodecyl sulfonate and 20ml of deionized water thoroughly in a flask to obtain mixture B;

[0015] S32. Sonicate mixture B for 30 min to obtain a uniform amino-functionalized carbon nanotube suspension.

[0016] S4. Preparation of aerogel precursor;

[0017] S41. Under stirring, dissolve 4g of calcium alginate, 4g of modified straw powder-encapsulated polyethylene glycol, and 2g of polyphosphate in 80ml of deionized water for 2h to obtain mixture C;

[0018] S42. The prepared amino-functionalized carbon nanotube suspension and 1g of N,N-methylenediethylamine were introduced into mixture C, and then stirred for 2h to obtain N,N-methylenediethylamine crosslinked aerogel precursor.

[0019] S5. Preparation of fire early warning aerogel;

[0020] S51, N,N-methylenediethylamine crosslinked aerogel precursor was pre-frozen at -20℃ for 16 hours and then freeze-dried for 24 hours.

[0021] S52. The aerogel treated in S51 is immersed in a 5% CaCl2 solution for 24 hours to form a cross-linked CaCl2 structure with an eggshell structure. 2+ Hydrogel;

[0022] S53. After freeze-drying the hydrogel for 4 hours, crush it and spray nano-CaCO3 particles on its surface to obtain fire early warning aerogel powder with an average particle size of 0.25-0.35 mm.

[0023] Specifically, the average particle size of the conductive ceramic is 0.45 mm, and the maximum particle size is 0.5 mm.

[0024] Specifically, the compensator is CaO-Al2O3-CaSO3.

[0025] Specifically, the thickener is a cement mortar plasticizer.

[0026] Specifically, the coupling agent used is KH-550.

[0027] Specifically, the waterproofing agent is a ferric chloride waterproofing agent.

[0028] Specifically, the method for preparing silver nanowire suspension includes the following steps:

[0029] P1. Add 0.1g FeCl3 and 0.052g polyvinylpyrrolidone to ethylene glycol and stir for 2.0h to obtain mixture D;

[0030] P2. Dissolve 0.724g of silver nitrate in mixture D and stir for 15min to obtain mixture E;

[0031] P3. Transfer the mixture E to a stainless steel autoclave and place it in an oven at 180°C for 6 hours to obtain a solid mixture F of AgCl and FeNO3.

[0032] P4. Wash mixture F with ethanol solution and separate AgCl solid by centrifugation;

[0033] P5. Silver nanowires were obtained by irradiating AgCl solid with light for 24 hours.

[0034] P6. Mix 0.1g of silver nanowires, 0.1g of sodium dodecyl sulfonate and 20ml of deionized water thoroughly in a flask and sonicate for 30min to obtain a uniform silver nanowire suspension.

[0035] A method for preparing green and intelligent fireproof concrete includes the following steps:

[0036] N1. Preparation of mixed aqueous solution: Mix water with compensating agent, thickener, coupling agent and waterproofing agent according to the required weight ratio and stir evenly to completely dissolve the additives in water to obtain a mixed aqueous solution;

[0037] N2. Solid material mixing: According to the weight ratio, add conductive ceramics, cement, rice husk ash and fire warning aerogel powder to the mixing container in sequence and dry mix to prepare solid mixture;

[0038] N3. Pulping: The prepared mixed aqueous solution and nanowire suspension are added to the solid mixture and stirred evenly. Then, the dispersed waste tire steel fibers are slowly added to obtain fiber aerogel concrete.

[0039] N4. Pouring and curing: The fiber aerogel concrete is poured into the mold, sealed with a film, and placed at room temperature. After 24 hours, it is demolded and placed in a standard curing room. After curing for 28 days, green intelligent fireproof concrete is obtained.

[0040] Specifically, in N4, the room temperature is 20±2℃, the temperature in the standard curing room is 20±2℃, and the relative humidity is 95%.

[0041] The beneficial effects of this invention are:

[0042] 1. This invention has an extremely early fire warning function and ultra-high flame retardant performance, as well as good fire resistance. It has an ideal fire prevention effect under high temperature conditions, can respond quickly to fire or high temperature and can achieve fire alarm without relying on external early warning systems, thus having good flexibility.

[0043] 2. Adding rice husk ash and waste tire steel fibers to green intelligent fireproof concrete can improve the utilization rate of solid waste, significantly enhance the crack resistance and durability of the matrix while ensuring the strength of the concrete, and make the structure have good energy dissipation and shock absorption performance.

[0044] 3. Green intelligent fireproof concrete has stable electrical conductivity and controllable electrothermal performance when energized. When applied to thermal insulation enclosure structures, it can melt ice and snow, reduce the load on insulated roofs in winter, and detect structural cracks and their propagation based on changes in concrete resistivity. When not energized, it has good electromagnetic properties, effectively shielding electromagnetic waves, reducing electromagnetic radiation, and minimizing electromagnetic interference. Detailed Implementation

[0045] The present invention will be further described below with reference to embodiments:

[0046] A green and intelligent fireproof concrete, by weight proportions, is composed of the following components: 400-450 parts cement, 50-100 parts rice husk ash, 50-100 parts fire warning aerogel powder, 6-10 parts waste tire steel fiber, 1400-1450 parts conductive ceramic, 250 parts water, 60-80 parts silver nanowire suspension, 20-24 parts compensating agent, 1-3 parts thickener, 1-2 parts coupling agent, 2 parts defoamer, and 10-14 parts waterproofing agent.

[0047] Table 1 - Main technical parameters of cement are as follows:

[0048]

[0049] Table 2 - Chemical composition (%) of cementitious materials is as follows:

[0050]

[0051] The method for preparing disaster early warning aerogel powder includes the following steps:

[0052] S1, Degreasing of precursor straw;

[0053] S11. Immerse 10g of precursor straw powder and 5g of urea in 100ml of anhydrous ethanol at 75℃ with magnetic stirring for 6 hours to obtain mixture A;

[0054] S12. Freeze-dry mixture A for 24 hours using a freeze dryer to obtain modified straw powder;

[0055] S2, encapsulated with polyethylene glycol;

[0056] Polyethylene glycol was encapsulated into the microtubular structure of modified straw powder by impregnation, and then freeze-dried to obtain polyethylene glycol encapsulated with modified straw powder.

[0057] S3, preparation of amino-functionalized carbon nanotube suspension;

[0058] S31. Mix 0.1g of amino-functionalized carbon nanotubes, 0.1g of sodium dodecyl sulfonate and 20ml of deionized water thoroughly in a flask to obtain mixture B;

[0059] S32. Sonicate mixture B for 30 min to obtain a uniform amino-functionalized carbon nanotube suspension.

[0060] S4. Preparation of aerogel precursor;

[0061] S41. Under stirring, dissolve 4g of calcium alginate, 4g of modified straw powder-encapsulated polyethylene glycol, and 2g of polyphosphate in 80ml of deionized water for 2h to obtain mixture C;

[0062] S42. The prepared amino-functionalized carbon nanotube suspension and 1g of N,N-methylenediethylamine were introduced into mixture C, and then stirred for 2h to obtain N,N-methylenediethylamine crosslinked aerogel precursor.

[0063] S5. Preparation of fire early warning aerogel;

[0064] S51, N,N-methylenediethylamine crosslinked aerogel precursor was pre-frozen at -20℃ for 16 hours and then freeze-dried for 24 hours.

[0065] S52. The aerogel treated in S51 is immersed in a 5% CaCl2 solution for 24 hours to form a cross-linked CaCl2 structure with an eggshell structure. 2+ Hydrogel;

[0066] S53. After freeze-drying the hydrogel for 4 hours, crush it and spray nano-CaCO3 particles on its surface to obtain fire early warning aerogel powder with an average particle size of 0.25-0.35 mm.

[0067] The average particle size of the conductive ceramic is 0.45 mm, and the maximum particle size is 0.5 mm.

[0068] The compensator used is CaO-Al2O3-CaSO3.

[0069] The thickener is a plasticizer for cement mortar, composed of raw gypsum, ethoxylated sodium alkyl sulfide, sodium dodecyl sulfonate, and other components.

[0070] The coupling agent used is KH-550.

[0071] The waterproofing agent is ferric chloride waterproofing agent.

[0072] The method for preparing silver nanowire suspension includes the following steps:

[0073] P1. Add 0.1g FeCl3 and 0.052g polyvinylpyrrolidone to ethylene glycol and stir for 2.0h to obtain mixture D;

[0074] P2. Dissolve 0.724g of silver nitrate in mixture D and stir for 15min to obtain mixture E;

[0075] P3. Transfer the mixture E to a stainless steel autoclave and place it in an oven at 180°C for 6 hours to obtain a solid mixture F of AgCl and FeNO3.

[0076] P4. Wash mixture F with ethanol solution and separate AgCl solid by centrifugation;

[0077] P5. Silver nanowires were obtained by irradiating AgCl solid with light for 24 hours.

[0078] P6. Mix 0.1g of silver nanowires, 0.1g of sodium dodecyl sulfonate and 20ml of deionized water thoroughly in a flask and sonicate for 30min to obtain a uniform silver nanowire suspension.

[0079] By utilizing the physical filling properties and pozzolanic properties of rice husk ash, it is possible to improve the concrete's resistance to sulfate corrosion and high temperature resistance, while also further reducing the thermal conductivity of the concrete and the resistivity of the concrete structure.

[0080] By utilizing the temperature sensitivity of the resistance value of carbon nanotubes in fire early warning aerogel powder and their flame-retardant properties as the main carrier for transmitting information on concrete temperature changes, and by spraying nanoparticles on its surface, its bonding with the concrete matrix can be enhanced.

[0081] The property of polyethylene glycol in fire early warning aerogel powder to have a constant phase transition temperature and reduce heat transfer is used to improve the thermal insulation performance of concrete.

[0082] By using straw powder as a skeleton to encapsulate polyethylene glycol, and by degreasing the straw powder to give it good binding properties, it can serve as a carrier for polyethylene glycol, thus solving the problem of reduced thermal insulation of aerogel particles caused by blockage of aerogel pores during the phase change of polyethylene glycol.

[0083] Waste tire steel fibers and conductive ceramics are used as the main carriers for transmitting electrical signals, supplemented by silver nanowires to enhance their ability to transmit electrical signals inside concrete.

[0084] A method for preparing green and intelligent fireproof concrete includes the following steps:

[0085] N1. Preparation of mixed aqueous solution: Mix water with compensating agent, thickener, coupling agent and waterproofing agent according to the required weight ratio and stir evenly to completely dissolve the additives in water to obtain a mixed aqueous solution;

[0086] N2. Solid material mixing: According to the weight ratio, add conductive ceramics, cement, rice husk ash and fire warning aerogel powder to the mixing container in sequence and dry mix to prepare solid mixture;

[0087] N3. Pulping: The prepared mixed aqueous solution and nanowire suspension are added to the solid mixture and stirred evenly. Then, the dispersed waste tire steel fibers are slowly added to obtain fiber aerogel concrete.

[0088] N4. Pouring and curing: The fiber aerogel concrete is poured into the mold, sealed with a film and placed at room temperature. After 24 hours, it is demolded and placed in a standard curing room. After curing for 28 days, green intelligent fireproof concrete is obtained. The room temperature is 20±2℃, the temperature in the standard curing room is 20±2℃, and the relative humidity is 95%.

[0089] Example 1

[0090] A green and intelligent fireproof concrete, by weight proportions, is composed of the following components: 450 parts cement, 50 parts rice husk ash, 50 parts fire early warning aerogel powder, 10 parts waste tire steel fiber, 1450 parts conductive ceramic, 250 parts water, 60 parts silver nanowire suspension, 20 parts compensating agent, 1 part thickener, 1 part coupling agent, 2 parts defoamer, and 10 parts waterproofing agent.

[0091] Green intelligent fireproof concrete is prepared according to the above preparation method.

[0092] Example 2

[0093] A green and intelligent fireproof concrete, by weight proportions, is composed of the following components: 425 parts cement, 75 parts rice husk ash, 75 parts fire warning aerogel powder, 8 parts waste tire steel fiber, 1425 parts conductive ceramic, 250 parts water, 70 parts silver nanowire suspension, 22 parts compensating agent, 2 parts thickener, 1 part coupling agent, 2 parts defoamer, and 12 parts waterproofing agent.

[0094] The preparation method for green and intelligent fireproof concrete is the same as in Example 1.

[0095] Example 3

[0096] A green and intelligent fireproof concrete, by weight proportions, is composed of the following components: 400 parts cement, 100 parts rice husk ash, 100 parts fire warning aerogel powder, 6 parts waste tire steel fiber, 1400 parts conductive ceramic, 250 parts water, 80 parts silver nanowire suspension, 24 parts compensating agent, 3 parts thickener, 2 parts coupling agent, 2 parts defoamer, and 14 parts waterproofing agent.

[0097] The preparation method for green and intelligent fireproof concrete is the same as in Example 1.

[0098] Comparative Example 1

[0099] Comparative Example 1 followed Example 1 without adding conductive materials (fire warning aerogel powder, waste tire steel fiber, conductive ceramics, silver nanowire suspension), and replaced conductive ceramic particles with sand of the same particle size range to prepare concrete.

[0100] The mixed slurry from Examples 1-3 and Comparative Example 1 was poured into a mold to prepare test blocks. The test blocks for testing compressive strength were cubic blocks with dimensions of 100mm×100mm×100mm, and the test blocks for testing flexural strength were small beam blocks with dimensions of 150mm×150mm×600mm. After molding, the test blocks were cured in a standard curing room for 28 days. The testing method was in accordance with GB / T 50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete".

[0101] The test block for testing thermal conductivity was a cubic block with dimensions of 300mm×300mm×300mm. After molding, it was cured in a standard curing room for 28 days. The test block was then dried in an oven at a temperature of (60±5)℃ until constant weight and then cooled to room temperature. The test method was based on GB / T 10294-2008 "Determination of Steady-State Thermal Resistance and Related Properties of Thermal Insulation Materials - Protective Hot Plate Method".

[0102] The test block for volume resistivity testing is a cubic block with dimensions of 100mm×100mm×100mm. After molding, it is cured in a standard curing room for 28 days. The test method refers to GB / T 1410-2006 "Test Method for Volume Resistivity and Surface Resistivity of Solid Insulating Materials".

[0103] The specific results of the performance test are shown in Table 3:

[0104] Table 3 Performance test results of Examples 1-3 and Comparative Example 1

[0105]

[0106] The fire resistance performance of the concrete obtained in Examples 1-3 and Comparative Example 1 was tested. The specific test methods are as follows:

[0107] (1) 28d compressive strength: determined according to GB / T 50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete";

[0108] (2) Residual strength after firing: After the concrete test blocks are cured for 28 days, the surface moisture is wiped off and then placed in a high-temperature furnace at 800℃ for 2.5h. The compressive strength after firing is determined according to GB / T 50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete".

[0109] (3) Refractory properties: strength after calcination / strength before calcination.

[0110] The specific measurement results are shown in Table 4:

[0111] Table 4. Fire resistance test results of Examples 1-3 and Comparative Example 1

[0112] Performance indicators Example 1 Example 2 Example 3 Comparative Example 1 Compressive strength / MPa 45.2 42.6 38.8 52.3 Residual strength / MPa 31.6 31.5 30.7 22.0 Fire resistance 0.71 0.74 0.79 0.42

[0113] As shown in Table 3, the green intelligent fireproof concrete prepared in Examples 1-3 has excellent thermal insulation performance and electrical signal conduction ability. When cracks occur in the concrete, the randomly distributed fibers can improve the force field distribution in the concrete, prevent the cracks from expanding, and weaken its vibration effect. This can better meet the increasingly high requirements of the construction industry for the comprehensive performance of concrete.

[0114] By comparing Comparative Example 1 and Example 1 in Table 4, it can be seen that although the 28-day compressive strength of the concrete with conductive materials is lower than that of the reference concrete, its residual strength after high-temperature calcination is significantly improved, and it has better fire resistance and has a greater market prospect.

[0115] This invention features extremely early fire warning capabilities and ultra-high flame retardant properties, along with excellent fire resistance and ideal fire protection under high-temperature conditions. It can respond rapidly to fires or high temperatures without relying on external warning systems, offering excellent flexibility. Adding rice husk ash and waste tire steel fibers to the green intelligent fireproof concrete improves the utilization rate of solid waste, significantly enhancing the crack resistance and durability of the matrix while maintaining concrete strength, resulting in excellent energy dissipation and vibration reduction performance. When energized, the green intelligent fireproof concrete exhibits stable electrical conductivity and controllable electrothermal properties. When applied to insulated building envelopes, it can melt ice and snow, reducing the load on insulated roofs in winter, and can detect structural cracks and their propagation based on changes in concrete resistivity. When de-energized, it possesses excellent electromagnetic properties, effectively shielding electromagnetic waves, reducing electromagnetic radiation, and minimizing electromagnetic interference.

[0116] The present invention has been described above by way of example. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or direct application to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A smart fireproof concrete, characterized in that, The formula is composed of the following components in parts by weight: 400-450 parts cement, 50-100 parts rice husk ash, 50-100 parts fire warning aerogel powder, 6-10 parts waste tire steel fiber, 1400-1450 parts conductive ceramic, 250 parts water, 60-80 parts silver nanowire suspension, 20-24 parts compensating agent, 1-3 parts thickener, 1-2 parts coupling agent, 2 parts defoamer, and 10-14 parts waterproofing agent. The compensator used is CaO-Al2O3-CaSO3; The method for preparing fire early warning aerogel powder includes the following steps: S1, Degreasing of precursor straw; S11. 10g of precursor straw powder and 5g of urea were immersed in 100ml of anhydrous ethanol for 6 hours under magnetic stirring at 75°C to obtain mixture A. S12. Freeze-dry mixture A for 24 hours using a freeze dryer to obtain modified straw powder; S2, encapsulated with polyethylene glycol; Polyethylene glycol was encapsulated into the microtubular structure of modified straw powder by impregnation, and then freeze-dried to obtain polyethylene glycol encapsulated with modified straw powder. S3, preparation of amino-functionalized carbon nanotube suspension; S31. Mix 0.1g of amino-functionalized carbon nanotubes, 0.1g of sodium dodecyl sulfonate and 20ml of deionized water thoroughly in a flask to obtain mixture B; S32. Sonicate mixture B for 30 min to obtain a uniform amino-functionalized carbon nanotube suspension. S4. Preparation of aerogel precursor; S41. Under stirring, dissolve 4g of calcium alginate, 4g of modified straw powder-encapsulated polyethylene glycol, and 2g of polyphosphate in 80ml of deionized water for 2 hours to obtain mixture C. S42. The prepared amino-functionalized carbon nanotube suspension and 1g of N,N-methylenediethylamine were introduced into mixture C, and then stirred for 2 h to obtain N,N-methylenediethylamine crosslinked aerogel precursor. S5. Preparation of fire early warning aerogel; S51, N,N-methylenediethylamine crosslinked aerogel precursor was pre-frozen at -20°C for 16 hours and then freeze-dried for 24 hours. S52. The aerogel treated in S51 is immersed in a 5% CaCl2 solution for 24 hours to form a cross-linked CaCl2 structure with an eggshell structure. 2+ Hydrogel; S53. After freeze-drying the hydrogel for 4 hours, crush it and spray nano-CaCO3 particles on its surface to obtain fire early warning aerogel powder with an average particle size of 0.25-0.35 mm.

2. The intelligent fireproof concrete according to claim 1, characterized in that, The average particle size of the conductive ceramic is 0.45 mm, and the maximum particle size is 0.5 mm.

3. The intelligent fireproof concrete according to claim 1, characterized in that, The thickener is a plasticizer for cement mortar.

4. The intelligent fireproof concrete according to claim 1, characterized in that, The coupling agent used is KH-550.

5. The intelligent fireproof concrete according to claim 1, characterized in that, The waterproofing agent is ferric chloride waterproofing agent.

6. The intelligent fireproof concrete according to claim 1, characterized in that, The method for preparing silver nanowire suspension includes the following steps: P1. Add 0.1g FeCl3 and 0.052g polyvinylpyrrolidone to ethylene glycol and stir for 2.0h to obtain mixture D; P2. Dissolve 0.724g of silver nitrate in mixture D and stir for 15min to obtain mixture E; P3. Transfer the mixture E to a stainless steel autoclave and place it in an oven at 180°C for 6 hours to obtain a solid mixture F of AgCl and FeNO3. P4. Wash mixture F with ethanol solution and separate AgCl solid by centrifugation; P5. Silver nanowires were obtained by irradiating AgCl solid with light for 24 hours. P6. Mix 0.1g of silver nanowires, 0.1g of sodium dodecyl sulfonate and 20ml of deionized water thoroughly in a flask and sonicate for 30 min to obtain a uniform silver nanowire suspension.

7. A method for preparing intelligent fireproof concrete according to claim 1, characterized in that, Includes the following steps: N1. Preparation of mixed aqueous solution: Mix water with compensating agent, thickener, coupling agent and waterproofing agent according to the required weight ratio and stir evenly to completely dissolve the additives in water to obtain a mixed aqueous solution; N2. Solid material mixing: According to the weight ratio, add conductive ceramics, cement, rice husk ash and fire warning aerogel powder to the mixing container in sequence and dry mix to prepare solid mixture; N3. Pulping: The prepared mixed aqueous solution and nanowire suspension are added to the solid mixture and stirred evenly. Then, the dispersed waste tire steel fibers are slowly added to obtain fiber aerogel concrete. N4. Pouring and curing: The fiber aerogel concrete is poured into the mold, sealed with a film, and placed at room temperature. After 24 hours, it is demolded and placed in a standard curing room. After curing for 28 days, the intelligent fireproof concrete is obtained.

8. The method for preparing intelligent fireproof concrete according to claim 7, characterized in that, In N4, the room temperature is 20±2℃, the temperature in the standard curing room is 20±2℃, and the relative humidity is 95%.

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