Long-acting anti-static fireproof mortar and preparation method thereof

Abstract

The invention provides long-acting anti-static fireproof mortar and a preparation method thereof, and belongs to the technical field of building materials. The mortar is prepared from raw materials in parts by mass as follows: a component A: 0.5-1.5 parts of conductive carbon fibers, 0.8-1.2 parts of polypropylene fibers, 5-10 parts of a hydrogen peroxide aqueous solution and 8-23 parts of a maleic anhydride monomer, an acrylic monomer and an initiator; component B: 5-15 parts of glass beads, 0.5-3 parts of a silane coupling agent, and 1-4 parts of an alkaline reinforcing agent; component C: 85-100 parts of a mortar base material, 0.1-5 parts of an auxiliary agent, and 1-5 parts of water. The long-acting anti-static fireproof mortar provided by the invention has outstanding electrical conductivity, fire resistance and relatively high mechanical strength, and can be applied to territorial scenes needing fire-free building materials, and various properties of the mortar meet the index requirements of industrial standards through detection.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, and particularly relates to a long-acting antistatic fireproof mortar and a preparation method thereof. Background Art

[0002] Non-pyrophoric anti-static mortar is a building material with unique properties. Its main characteristic is that it will not produce sparks when subjected to friction, impact or shock. It is suitable for places where it is necessary to prevent static electricity accumulation and spark generation at the same time, such as chemical plants, gas stations, etc.

[0003] At present, the anti-static mortar on the market is mostly composed of cement, non-pyrophoric aggregate and admixtures, and in order to improve the anti-static effect, conductive materials are also added, such as conductive fibers, graphite carbon black, conductive mica powder, conductive metal powder and conductive additives. Among them, graphite carbon black has a large oil absorption capacity and its practical application is relatively limited; the anti-static effect of conductive additives is short and not suitable for long-term application; conductive metal powders are prone to rust and failure; the amount of conductive mica powder required is large and the cost is high; and conductive fibers, such as conductive carbon fibers obtained by filling graphite in acrylonitrile-based carbon fibers, can achieve good conductivity with a small amount of addition and the cost is relatively low, but their dispersibility is poor, which leads to uneven distribution of resistance values ​​and is difficult to control, which can easily lead to local overheating of the material and cause breakdown, which is not conducive to long-term anti-static and fire prevention. In addition, studies have shown that (Reference: Sun Jianhu, Shi Shaoqing, Liu Yingfang, et al. Experimental study on the performance of conductive carbon fiber concrete [J]. Concrete, 2012(7):3.) conductive carbon fiber, due to its low surface energy, will carry and introduce bubbles when added to concrete, thereby affecting the strength of the material, especially the compressive strength.

[0004] At the same time, the existing anti-static mortar has the disadvantages of weak high temperature resistance and high wear after long-term use when used as floor materials, and is not easy to repair when defects, cracks and other problems occur. This is because ordinary repair mortar cannot make up for its anti-static performance, and the strength, flexibility and adhesion of traditional anti-static mortar to the substrate when used as a repair material still need to be improved. Summary of the invention

[0005] In order to solve the above problems, the present application aims to provide a non-fireable mortar which has a long-lasting anti-static and fireproofing effect, can also show better strength, and is suitable as a repair material.

[0006] On the one hand, the present application provides a long-lasting antistatic fireproof mortar, and the raw materials for preparing the mortar include, by weight: Component A: 0.5 - 1.5 parts of conductive carbon fiber, 0.8 - 1.2 parts of polypropylene fiber, 5 - 10 parts of aqueous hydrogen peroxide solution, and a total of 8 - 23 parts of maleic anhydride monomer, acrylic acid monomer, and initiator; Component B: 5 - 15 parts of vitrified microspheres, 0.5 - 3 parts of silane coupling agent, 1 - 4 parts of basicity enhancer, Component C: 85 - 100 parts of mortar base material, 0.1 - 5 parts of auxiliary agent, 1 - 5 parts of water.

[0007] In one embodiment, the molar ratio of the maleic anhydride monomer, acrylic acid monomer, and initiator in Component A is (1 - 2):(0.6 - 0.8):(0.2 - 0.5).

[0008] In one embodiment, the initiator is selected from one or more of persulfates, sulfites, and organic peroxides, preferably persulfates, such as potassium persulfate, sodium persulfate, and ammonium persulfate.

[0009] In one embodiment, the mass concentration (wt%) of the aqueous hydrogen peroxide solution in Component A is 5% - 15%.

[0010] In one embodiment, in Component A, the length of the conductive carbon fiber is 3 - 10 mm, for example, it can be 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm.

[0011] In one embodiment, the length of the polypropylene fiber is 2 - 4 mm, for example, 2 mm, 3 mm, 4 mm.

[0012] In one embodiment, the basicity enhancer in Component B is selected from one or more of magnesium oxide, potassium silicate, sodium silicate, lithium carbonate, and lithium acetate. For example, it can be a combination of magnesium oxide, potassium silicate or sodium silicate, lithium carbonate or lithium acetate, or a combination containing magnesium oxide, potassium silicate, sodium silicate, lithium carbonate, and lithium acetate at the same time.

[0013] Preferably, in the basicity enhancer of Component B, the mass ratio of magnesium oxide, potassium silicate and / or sodium silicate, lithium carbonate and / or lithium acetate is (1 - 3):(0.05 - 0.60):(0.01 - 0.03).

[0014] In one embodiment, in Component B, the particle size of the vitrified microspheres is 0.5 - 1.5 mm.

[0015] In one embodiment, in Component B, the silane coupling agent is selected from one or more of KH550, KH560, and KH570.

[0016] In one embodiment, in Component C, the mortar base material comprises: 30 - 35 parts of cement, 50 - 60 parts of dolomite sand with a particle size of 20 - 80 mesh, 1 - 3 parts of gypsum, and 8 - 10 parts of fly ash.

[0017] In one embodiment, the cement can be P·O 42.5 cement.

[0018] In one embodiment, the dolomite sand comprises coarse dolomite sand, medium dolomite sand, and fine dolomite sand with a mass ratio of 4:3:3. The particle size of the coarse dolomite sand is 10 - 30 mesh, the particle size of the medium dolomite sand is 40 - 60 mesh, and the particle size of the fine dolomite sand is 80 - 100 mesh.

[0019] In one embodiment, the gypsum is selected from hemihydrate gypsum or dihydrate gypsum.

[0020] In one embodiment, the particle size of the fly ash is 0.5 - 300 μm.

[0021] In one embodiment, in Component C, the additives are defoaming agents and / or water - reducing agents.

[0022] In one embodiment, the defoaming agent is selected from polyether - type, silicone - type, or alcohol - type defoaming agents, such as polyether siloxane, polyethylene oxide alcohol, etc.

[0023] In one embodiment, the water - reducing agent is a polycarboxylate water - reducing agent.

[0024] On the other hand, the present application also provides a method for preparing the long - acting antistatic and fire - resistant mortar, comprising: Step 1: Put the maleic anhydride monomer, acrylic monomer, and initiator in Component A into an aqueous hydrogen peroxide solution. After heating and pre - heating, add conductive carbon fibers, and mix and stir to carry out a polymerization reaction to obtain a mixed solution of maleic anhydride - acrylic acid copolymer - coated conductive carbon fibers. After the reaction ends, add polypropylene fibers to the mixed solution and stir and blend for modification to obtain a first mixture; Step 2: Mix the vitrified microspheres and silane coupling agent in Component B, then add an alkaline enhancer and mix and stir evenly to obtain a second mixture. Add the second mixture to the first mixture prepared in Step 1 and stir evenly to obtain a third mixture; Step 3: Mix the mortar base material and additives in Component C and stir evenly. After adding the third mixture obtained in Step 2, then add water in Component C and stir evenly to obtain the long - acting antistatic and fire - resistant mortar.

[0025] It can be understood that in the above - mentioned method, the raw materials in each component are weighed by mass parts and then the reaction operation is carried out.

[0026] In the above method for preparing the mortar, in component A of step one, maleic anhydride, acrylic acid monomers, initiator and conductive carbon fibers are mixed and copolymerized, so that after the monomers are polymerized, a polymer coating the conductive carbon fibers is formed. At the same time, an appropriate amount of hydrogen peroxide can not only be used as a catalyst for the polymerization of maleic anhydride and acrylic acid in an aqueous solvent, but also appropriately oxidize the conductive carbon fibers to generate some carboxyl and hydroxyl groups on their surfaces. Thus, while increasing the active sites and reducing the surface energy, it can also combine with the groups of the copolymer in the form of chemical bonds, improving the coating effect of the copolymer on the carbon fibers. Such a way of incorporating the conductive carbon fibers can, on the one hand, effectively avoid carrying air bubbles and improve the impact on the mortar strength. On the other hand, the maleic anhydride-acrylic acid copolymer with a specific monomer ratio can show appropriate viscosity and better dispersibility in the mortar base material, thus significantly improving the dispersion uniformity of the conductive carbon fibers in the mortar base material and effectively enhancing the long-term anti-static effect of the mortar. Moreover, the maleic anhydride-acrylic acid copolymer can also modify the surface of the polypropylene fibers, further enhancing the reinforcing effect of the polypropylene fibers on the mortar, while also improving the fluidity of the mortar and the adhesion between the mortar and the substrate layer, enabling it to be used as a repair material. In addition, when the maleic anhydride-acrylic acid copolymer is used as a mortar additive itself, it can also improve the effects of inhibiting carbonation, reducing shrinkage deformation, and improving anti-corrosion and acid-resistant properties, etc.

[0027] In step two, component B uses an alkaline enhancer composed of magnesium oxide, sodium silicate and / or potassium silicate, and lithium carbonate and / or lithium acetate in specific proportions. It can form a hydrated gel to fill pores after being mixed with the cement base material, improving the mortar density and hardness, and thus enhancing the mortar strength. Moreover, the alkalinity shown after the alkaline enhancer is dissolved in water can, on the one hand, neutralize the weak acidity of hydrogen peroxide after being mixed with component A of step one. On the other hand, it is also beneficial to improve the binding ability between the vitrified microspheres with silane coupling agent attached to their surfaces and the copolymer coating the conductive carbon fibers. Thus, while improving the dispersibility of the vitrified microspheres, it can fully exert the effects of the vitrified microspheres in terms of high-temperature flame retardancy, improving fluidity, adhesion between the vitrified microspheres and the substrate layer, and preventing breakdown caused by local overheating.

[0028] Meanwhile, in component C, the mortar base material uses a mixture of non-sparking dolomite sands with various different particle sizes as aggregates, assisting in increasing the diffusion degree of components A and B in the mortar after coating the cement, improving the mixing uniformity of the mortar, ensuring the performance of the mortar while improving the construction difficulty.

[0029] In one embodiment, in step one, the conditions for heating and preheating are: heating to 30 - 40 °C and reacting for 1 - 3 minutes.

[0030] In one embodiment, in the first step, the conditions for the polymerization reaction are: heating to 50 - 65 °C and reacting for 20 - 40 minutes.

[0031] In one embodiment, in the first step, the duration of the stirring and blending modification is 1 - 10 minutes.

[0032] In one embodiment, in the third step, the duration of thoroughly stirring and mixing evenly is 1 - 10 minutes.

[0033] In one embodiment, in the preparation method, the stirring speed for each step involving stirring is 60 - 200 r / min, preferably 80 - 120 r / min. For example, in the first step, to accelerate the monomer polymerization and improve the blending modification rate, the rotation speed during stirring can be set to 120 r / min; in the second and third steps, to prevent the material from splashing during stirring, the stirring rotation speed can be set to 80 r / min.

[0034] This application has at least the following beneficial effects: The antistatic and fireproof mortar prepared by this application using specific components and a specific preparation method has outstanding electrical conductivity, fire resistance, and relatively high mechanical strength. After testing, its performance meets the index requirements of industry standards and can be applied to regional scenarios that require the use of non-sparking building materials.

[0035] The antistatic and fireproof mortar prepared by this application using specific components and a specific preparation method has good fluidity, excellent flexibility, and high adhesion, enabling it to be used as a repair material for rapid repair of complex substrates and cracks, and has broad application prospects.

[0036] The antistatic and fireproof mortar prepared by this application using specific components and a specific preparation method overcomes the disadvantages of traditional antistatic mortar, such as poor high-temperature resistance and high wear during long-term use. At the same time, it solves the problems of uneven resistance distribution, poor breakdown resistance, and reduced strength caused by the incorporation of conductive carbon fibers, significantly improving the service life of the mortar and achieving long-term effectiveness. Specific Embodiments

[0037] To more clearly illustrate the overall concept of this application, the following will be described in detail by way of examples. In the following description, a large number of specific details are given to provide a more thorough understanding of this application. However, it is obvious to those skilled in the art that this application can be implemented without one or more of these details. In other examples, some well-known technical features are not described to avoid confusion with this application.

[0038] Unless otherwise specified, the raw materials, reagents, instruments, equipment, etc. involved in the following examples can be obtained through commercial channels, and the use of each instrument and equipment can refer to its conventional operation methods.

[0039] Among them, in the raw material components of the following examples, the conductive carbon fiber is commercially available with a length of 8 mm; the polypropylene fiber is commercially available with a length of 3 mm; the vitrified microspheres have a particle size of 0.1 - 2 mm and a flame retardant grade of A; the cement is P·O 42.5 cement; the hydrogen peroxide aqueous solution is commercially available 30 wt% hydrogen peroxide, and different concentrations required in the preparation of mortar can be freshly prepared according to conventional chemical methods as needed; the rest of the reagents are all chemical grade or industrial grade. The production equipment required for mortar preparation in the examples includes a magnetic stirrer and a mortar mixer, both of which are conventional commercially available equipment.

[0040] Example 1 This example provides a long-lasting antistatic and fireproof mortar. By mass fraction, the raw materials for preparing this mortar include: Component A: 1 part of conductive carbon fiber, 1 part of polypropylene fiber, 7 parts of hydrogen peroxide aqueous solution with a mass concentration of 10 wt%, and the feeding molar ratio of maleic anhydride monomer, acrylic acid monomer and initiator potassium persulfate is 1.5:0.7:0.3, with a total feeding of about 13.7 parts; Component B: 9 parts of vitrified microspheres, 1 part of silane coupling agent KH550, 2.31 parts of alkaline enhancer, which contains 2 parts of magnesium oxide, 0.3 part of potassium silicate and 0.01 part of lithium carbonate, that is, the mass ratio of magnesium oxide, potassium silicate and lithium carbonate is 2:0.3:0.01; Component C: 31.5 parts of cement, 22 parts of coarse dolomite sand, 16.5 parts of medium dolomite sand, 16.5 parts of fine dolomite sand, 1.3 parts of hemihydrate gypsum, 8.5 parts of fly ash, 0.5 part of polycarboxylate water reducer, 0.5 part of polyether silicone defoamer, 3.7 parts of water.

[0041] The above raw material components are made into mortar according to the following method steps: Step 1: Weigh the raw materials in Component A by mass fraction. Put the maleic anhydride monomer, acrylic acid monomer and initiator potassium persulfate into the hydrogen peroxide aqueous solution, heat to 45 °C and stir for 3 minutes for temperature rise and preheating, then add the conductive carbon fiber, and mix and heat to 60 °C and stir for 30 minutes to carry out a polymerization reaction to obtain a mixed solution of maleic anhydride - acrylic acid copolymer - coated conductive carbon fiber. After the reaction ends, let it stand and cool to room temperature, and then add the polypropylene fiber to the mixed solution and stir and blend at room temperature for 5 minutes to modify the polypropylene fiber to obtain the first mixture; Step 2, weigh the raw materials in component B respectively by mass, mix the glass microspheres and the silane coupling agent KH550, add the alkaline enhancer and mix and stir to obtain a second mixture, add the second mixture to the first mixture obtained in step 1 and stir to obtain a third mixture; Step 3: Weigh the raw materials in component C by mass, mix and stir evenly the cement, coarse dolomite sand, medium dolomite sand, fine dolomite sand, semi-hydrated gypsum, fly ash, polycarboxylic acid water reducer and polyether siloxane defoamer, add the third mixture obtained in step 2, and then add the water in component C, stir well to obtain a long-lasting antistatic fireproof mortar. Recorded as Example 1#.

[0042] Among them, the stirring speed involved in step one is 120r / min, and the stirring speed involved in steps two and three is 80r / min.

[0043] Example 2 The raw materials and preparation methods of the mortar in this embodiment are substantially the same as those in Example 1, except that component A is: 0.8 parts of conductive carbon fiber, 1 part of polypropylene fiber, 7 parts of 5wt% hydrogen peroxide aqueous solution, the molar ratio of maleic anhydride monomer, acrylic acid monomer and initiator potassium persulfate is 1:0.7:0.3, and a total of about 11.5 parts of raw materials are added. The obtained mortar is recorded as Example 2#.

[0044] Example 3 The raw materials and preparation methods of the mortar in this embodiment are substantially the same as those in Example 1, except that component B is: 9 parts of vitrified microspheres, 1 part of silane coupling agent KH550, 3.12 parts of alkalinity enhancer, which contains 3 parts of magnesium oxide, 0.1 parts of sodium silicate and 0.02 parts of lithium acetate, i.e., the mass ratio of magnesium oxide, sodium silicate and lithium acetate is 3:0.1:0.02. The obtained mortar is recorded as Example 3#.

[0045] Example 4 The raw materials and preparation methods of the mortar in this embodiment are substantially the same as those in Example 1, except that component C is: 34 parts of cement, 20 parts of coarse dolomite sand, 15 parts of medium dolomite sand, 15 parts of fine dolomite sand, 1.3 parts of hemihydrate gypsum, 10 parts of fly ash, 0.5 parts of polycarboxylic acid water reducer, 0.5 parts of polyether siloxane defoamer, and 3.7 parts of water. The obtained mortar is recorded as Example 4#.

[0046] Comparative Example 1 The preparation method of this comparative example is substantially the same as that of Example 1, except that component A contains only 1 part of conductive carbon fiber and 1 part of polypropylene fiber, ie, does not contain maleic anhydride-acrylic acid copolymer. The obtained mortar is recorded as Example D1#.

[0047] Comparative Example 2 The preparation method of this comparative example is substantially the same as that of Example 1, except that in Component B, there is only 2.31 parts of basicity enhancer, that is, neither vitrified microspheres nor silane coupling agent is contained. The obtained mortar is denoted as Example D2#.

[0048] Comparative Example 3 This comparative example is a mortar without antistatic and fireproof effects, that is, the preparation method is substantially the same as that of Example 1, except that in Component A, carbon fiber is not contained, and only commercially available maleic anhydride-acrylic acid copolymer and polypropylene fiber are used for blending modification; in Component B, neither vitrified microspheres nor silane coupling agent is contained, and only basicity enhancer is used; Component C is exactly the same as that in Example 1. The obtained mortar is denoted as Example D3#.

[0049] Meanwhile, the present application also carried out an optimization process, that is, a series of mortar examples were prepared. The preparation methods of this series of examples are substantially the same as that of the example, but there are minor differences in some components or preparation steps, and performance tests were carried out. According to the test results, the components of the mortar raw material composition provided by the present application were obtained. Specifically, a series of mortar examples 5# to 10# were prepared, among which: in Component A of Example 5#, acrylamide monomer was used to replace maleic anhydride monomer and acrylic acid monomer, that is, acrylamide was used to wrap and polymerize the conductive carbon fiber; in Component A of Example 6#, the conductive carbon fiber, polypropylene fiber and commercially available maleic anhydride-acrylic acid copolymer were mixed together, that is, the blending method was used to replace the wrapping polymerization; in Component A of Example 7#, an aqueous hydrogen peroxide solution with a mass concentration of 3% was used; in Component A of Example 8#, an aqueous hydrogen peroxide solution with a mass concentration of 20% was used; in Component A of Example 9#, the molar ratio of maleic anhydride monomer, acrylic acid monomer and initiator was 0.5:0.7:0.3; in Component A of Example 10#, the molar ratio of maleic anhydride monomer, acrylic acid monomer and initiator was 2.5:0.7:0.5; in Component B of Example 11#, the basicity enhancer contained 0.5 part of magnesium oxide, 1 part of potassium silicate and 0.01 part of lithium carbonate, that is, the mass ratio of magnesium oxide, potassium silicate and lithium carbonate was 0.5:1:0.01; in Component C of Example 12#, 55 parts of medium dolomite sand was used to replace the original coarse, medium and fine dolomite sand.

[0050] The mortar samples obtained from the above examples were respectively tested for electrical properties, construction properties, and mechanical properties. The specific test indicators and the test results of each example are shown in Table 1. Among them, for the mortar samples of each example, after the mortar was prepared, it was molded into test blocks with dimensions of 100 mm × 100 mm × 300 mm using a mold. After curing for 28 days under standard conditions, thin slices of the required size were cut according to the test method as the samples to be tested. Among them, the test method for mortar fluidity refers to the national standard document "GB / T 2419-2005 Determination Method for Fluidity of Cement Mortar"; the test methods for compressive strength and tensile bond strength refer to the building materials industry standard document "JC / T 2653-2022 Non-sparking Mortar"; the impact resistance was tested using the falling ball impact method, and the method refers to the building materials industry standard document "JC / T 2653-2022 Non-sparking Mortar", and the height of the falling ball when cracking was used as the result. The standard requirement is that there is no cracking or detachment from the bottom plate of the specimen when the steel ball falls from a height of 1 m; the test method for conductivity is as follows: the test blocks of each example sample were dried to a constant weight, cut into thin slices with a thickness of 10 mm, and any 10 of them were taken. The conductivity of each thin slice was measured using the four-electrode method, and the average value was calculated. Then, the maximum difference from the average value in the conductivity of the thin slices was calculated as the maximum difference / average value × 100%, and the result was rounded to an integer and recorded as the conductivity deviation percentage; the test method for breakdown voltage is as follows: the test blocks of each example sample were dried to a constant weight, cut into thin slices with a thickness of 20 mm, and tested using a withstand voltage detector, with a limited current of 2 mA / cm 2 Direct current, and any three slices were taken from each example for testing and the average value was used as the final result.

[0051]

[0052] As can be seen from the results in Table 1, compared with ordinary enhanced mortar (D3#), due to its own characteristics, the conductive carbon fiber will have a greater impact on the mortar performance after being incorporated (D1# and D2#). When preparing the anti-static and fire-proof mortar using the preparation method and raw material components provided in the present application, the proportion of monomers in the copolymerized polymer, the dosage of hydrogen peroxide, the proportion of alkaline enhancer, and the composition of the non-sparking sand all have a certain impact on the final mortar performance. Among them, Examples 1# to 4# prepared in Examples 1-4 showed significantly improved resistance distribution uniformity, breakdown resistance, and mechanical strength, improved the dispersibility after the incorporation of conductive carbon fiber and its impact on mortar strength and electrical properties, were beneficial to improving its service life, and achieved long-term anti-static and fire-proof; moreover, the mortar of Examples 1# to 4# had a large fluidity and a strong bond strength with the base layer, was more flexible, and was suitable as a repair material for quickly repairing small cracks, defects, etc. on the ground or conventional building materials, and was a more preferred example.

[0053] The mortar samples 1# to 4# prepared in Examples 1 to 4 were tested for the industry indicators of non-sparking mortar, aiming to obtain products that meet the industry standards and can be commercially transformed. Among them, the testing standards refer to the indicators specified in the building materials industry standard document "JC / T 2653-2022 Non-sparking Mortar". At the same time, wear resistance and flame retardancy tests were carried out. Among them, the wear resistance was tested using a wear testing machine, and the testing method was the internationally common rotating rubber grinding wheel method (500 g, 500 r). The flame retardancy test referred to the national standard method for testing the combustion performance of building materials. The obtained results are shown in Table 2.

[0054]

[0055] As can be seen from the results in Table 2, the mortar prepared by using the component raw materials and preparation method provided in this application can meet the index requirements of the building materials industry standard, and has better electrical conductivity, wear resistance and flame retardancy grades, which is beneficial to improving the long-term fire prevention and anti-static performance of the mortar. It can be used as a floor material, building material or repair material, and has broad application prospects.

[0056] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A long-acting antistatic and fireproof mortar, characterized in that, By mass parts, the raw materials for preparing the mortar include: Component A: 0.5 - 1.5 parts of conductive carbon fiber, 0.8 - 1.2 parts of polypropylene fiber, 5 - 10 parts of hydrogen peroxide aqueous solution, and a total of 8 - 23 parts of maleic anhydride monomer, acrylic acid monomer and initiator; Component B: 5 - 15 parts of vitrified microspheres, 0.5 - 3 parts of silane coupling agent, 1 - 4 parts of basic strength enhancer; Component C: 85 - 100 parts of mortar base material, 0.1 - 5 parts of auxiliary agent, 1 - 5 parts of water; The molar ratio of the maleic anhydride monomer, acrylic acid monomer and initiator is (1 - 2):(0.6 - 0.8):(0.2 - 0.5); the mass concentration of the hydrogen peroxide aqueous solution is 5% - 15%; The basic strength enhancer is selected from one or more of magnesium oxide, potassium silicate, sodium silicate, lithium carbonate, and lithium acetate.

2. The long-acting antistatic and fireproof mortar according to claim 1, wherein In the Component A, the length of the conductive carbon fiber is 3 - 10 mm; And / or, the length of the polypropylene fiber is 2 - 4 mm.

3. The long-acting antistatic and fireproof mortar according to claim 1, characterized in that In the basic strength enhancer of the Component B, the mass ratio of magnesium oxide, potassium silicate and / or sodium silicate, lithium carbonate and / or lithium acetate is (1 - 3):(0.05 - 0.60):(0.01 - 0.03).

4. The long-acting antistatic and fireproof mortar according to claim 1, wherein, In the Component B, the particle size of the vitrified microspheres is 0.1 - 2 mm; And / or, the silane coupling agent is selected from one or more of KH550, KH560, and KH570.

5. The long-acting antistatic and fireproof mortar according to claim 1, wherein In the Component C, the mortar base material includes: 30 - 35 parts of cement, 50 - 60 parts of dolomite sand with a mesh size of 20 - 80, 1 - 3 parts of gypsum, and 8 - 10 parts of fly ash.

6. The long-acting antistatic and fireproof mortar according to claim 5, characterized in that, The dolomite sand includes coarse dolomite sand, medium dolomite sand and fine dolomite sand with a mass ratio of 4:3:

3. The particle size of the coarse dolomite sand is 10 - 30 mesh, the particle size of the medium dolomite sand is 40 - 60 mesh, and the particle size of the fine dolomite sand is 80 - 100 mesh.

7. The long-acting antistatic and fireproof mortar according to claim 1, wherein, In the Component C, the auxiliary agent is a defoaming agent and / or a water reducing agent.

8. The preparation method of the long-acting antistatic and fireproof mortar according to any one of claims 1-7, characterized in that, Including: Step 1: Put the maleic anhydride monomer, acrylic acid monomer and initiator in Component A into the hydrogen peroxide aqueous solution. After heating and preheating, add the conductive carbon fiber, and mix and stir to carry out a polymerization reaction to obtain a mixed solution of maleic anhydride - acrylic acid copolymer coated with conductive carbon fiber. After the reaction is completed, add the polypropylene fiber to the mixed solution and stir and blend for modification to obtain a first mixture; Step 2: Mix the vitrified microspheres and silane coupling agent in Component B, then add the basic strength enhancer and mix and stir evenly to obtain a second mixture. Add the second mixture to the first mixture prepared in Step 1 and stir evenly to obtain a third mixture; Step 3: Mix the mortar base material and the auxiliary agent in Component C and stir evenly. After adding the third mixture obtained in Step 2, then add the water in Component C and stir evenly to obtain the long - term antistatic and fire - resistant mortar.

9. The preparation method according to claim 8, wherein In the Step 1, the conditions for heating and preheating are: heating to 40 - 50 °C and reacting for 1 - 3 minutes; And / or, the conditions for carrying out the polymerization reaction are: heating to 50 - 65 °C and reacting for 20 - 40 minutes; And / or, the duration of stirring and blending for modification is 1 - 10 minutes.

10. The preparation method according to claim 8, wherein, The duration of stirring evenly in the Step 3 is 1 - 10 minutes.

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