Basalt Fiber Reinforced Concrete Composite Insulated and Crack-Resistant Floor

Abstract

The present invention discloses a basalt fiber reinforced concrete composite insulation and crack resistant floor, belonging to the technical field of insulation and crack resistant floor processing. The present invention is used to solve the technical problems that the existing technology only relying on the reinforcement effect of basalt fibers cannot meet the requirements of DC traction power supply for the insulation of the floor, and considering the compatibility and dispersion of basalt fibers with concrete in concrete, when basalt fibers are doped into concrete, the crack resistance and insulation performance of the concrete need to be further improved. The basalt fiber reinforced concrete composite insulation and crack resistant floor is formed by pouring basalt fiber reinforced concrete. By modifying the basalt fibers, adding waterborne resin to the concrete, and optimizing the aggregate ratio of the concrete, the present invention improves the insulation performance of the concrete floor, while improving its tensile strength and compressive strength, and reducing its low water absorption rate, so that the concrete floor layer has excellent crack resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of processing of insulating and crack-resistant floors, and particularly to a basalt fiber-reinforced concrete composite insulating and crack-resistant floor. Background Art

[0002] With the development of urban rail transit, higher requirements are put forward for the power supply systems of each subway line. Due to poor crack resistance and insulation performance, the traditional concrete track floor cannot meet the requirements of DC traction power supply for floor insulation and crack prevention. Fiber reinforcement is one of the effective methods to improve the crack resistance of concrete. Adding steel fibers, plastic fibers, etc. to concrete can improve the tensile strength of concrete, thereby improving crack resistance. However, steel fibers are prone to corrosion, and plastic fibers have a low elastic modulus and limited tensile strength. As a new type of high-performance inorganic fiber, basalt fiber has the advantages of high tensile strength, large elastic modulus, corrosion resistance, etc., and can effectively improve the crack resistance of concrete.

[0003] In the prior art, basalt fiber is usually directly added to concrete as a reinforcing agent and mixed with concrete. However, considering the compatibility and dispersibility of basalt fiber in concrete, when basalt fiber is doped into concrete, the crack resistance and insulation performance of concrete need to be further improved, and the reinforcing effect of basalt fiber alone cannot meet the requirements of DC traction power supply for floor insulation.

[0004] In view of the technical defects in this regard, a solution is proposed herein. Summary of the Invention

[0005] The purpose of the present invention is to provide a basalt fiber-reinforced concrete composite insulating and crack-resistant floor, which is used to solve the technical problems that the reinforcing effect of basalt fiber alone in the prior art cannot meet the requirements of DC traction power supply for floor insulation, and considering the compatibility and dispersibility of basalt fiber in concrete, when basalt fiber is doped into concrete, the crack resistance and insulation performance of concrete need to be further improved.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The basalt fiber-reinforced concrete composite insulating and crack-resistant floor is formed by pouring basalt fiber-reinforced concrete, and the basalt fiber-reinforced concrete comprises the following raw materials in parts by weight: 900 - 1000 parts of coarse aggregate, 400 - 600 parts of fine aggregate, 300 - 400 parts of portland cement, 150 - 180 parts of epoxy resin, 5 - 8 parts of water reducing agent, 350 - 450 parts of drinking water, and 40 - 60 parts of modified basalt fiber;

[0008] The modified basalt fiber is processed by the following steps:

[0009] S1. Put basalt fiber and pure water into a three-necked flask, ultrasonically disperse for 30 - 50 min, transfer the three-necked flask to an iron stand with mechanical stirring and stir. Add dopamine hydrochloride to the three-necked flask, after stirring and dissolving, add 2-amino-2-methyl-1,3-propanediol to the three-necked flask, adjust the pH of the system to 8 - 9, raise the temperature of the three-necked flask to 40 - 45 °C, keep the temperature for reaction for 2 - 3 h, and perform post-treatment to obtain composite basalt fiber;

[0010] S2. Add the modification liquid and composite basalt fiber into a three-necked flask and stir, raise the temperature of the three-necked flask to 45 - 55 °C, add purified water to the three-necked flask, keep the temperature for reaction for 2 - 3 h, and perform post-treatment to obtain modified basalt fiber.

[0011] Furthermore, the coarse aggregate consists of large-sized quartz sand with a particle size of 8 - 10 mm, medium-sized quartz sand with a particle size of 5 - 8 mm, and small-sized quartz sand with a particle size of 2 - 5 mm in a weight ratio of 3:1:1. The fine aggregate is quartz sand crystal powder with a particle size less than 1 mm. The type of Portland cement is IP42.5, the epoxy resin is a commercially available waterborne epoxy resin with the model: waterborne epoxy resin CM3801, and the water reducer is one of DH-4005 type polycarboxylate water reducer and amino high-performance water reducer.

[0012] Furthermore, in step S1, the dosage ratio of basalt fiber, pure water, and dopamine hydrochloride is 2 g:50 mL:1 g. The post-treatment operation includes: after the reaction is completed, lower the temperature of the three-necked flask to room temperature, perform suction filtration, wash the filter cake with pure water until neutral, transfer the filter cake to a drying oven at a temperature of 70 - 80 °C, and dry to a constant weight to obtain composite basalt fiber.

[0013] Furthermore, the preparation method of the modification liquid is: put 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N-dimethylformamide, and sodium hydroxide into a three-necked flask under nitrogen protection and stir, raise the temperature of the three-necked flask to 55 - 65 °C, add diisopropanolamine to the three-necked flask, keep the temperature for reaction for 3 - 4 h, add KH-560 to the three-necked flask, keep the temperature for reaction for 2 - 3 h, and cool down to room temperature to obtain the modification liquid.

[0014] The synthesis reaction principle of the modification liquid is:

[0015]

[0016] Furthermore, the dosage ratio of 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N-dimethylformamide, sodium hydroxide, diisopropanolamine, and KH-560 is 15 g:50 mL:1.5 g:5 g:1 g.

[0017] Further, the dosage ratio of the modification liquid, composite basalt fiber and purified water in step S2 is 10 g: 3 g: 2 g. The post-treatment operation includes: after the reaction is completed, the temperature of the three-necked flask is reduced to room temperature, and suction filtration is carried out. The filter cake is washed with purified water until neutral, rinsed once with absolute ethanol and then dried by suction. The filter cake is transferred to an oven at 60-70 °C and dried to a constant weight to obtain modified basalt fiber.

[0018] A preparation method of a basalt fiber-reinforced concrete composite insulating and crack-resistant floor slab includes the following steps:

[0019] Step 1: Add coarse aggregate, fine aggregate, portland cement, epoxy resin, water reducer and drinking water into a concrete mixing tank, stir for 10-15 min, add modified basalt fiber into the concrete mixing tank, and continue to stir for 20-30 min to obtain basalt fiber-reinforced concrete;

[0020] Step 2: Lay the basalt fiber-reinforced concrete on the cement floor, uniformly moisten the concrete surface every 3-5 h, and wait for the basalt fiber-reinforced concrete to completely solidify to form a floor slab layer with a thickness of 8-10 cm.

[0021] The present invention has the following beneficial effects:

[0022] 1. For the basalt fiber-reinforced concrete composite insulating and crack-resistant floor slab of the present invention, during the processing, the pH of the dopamine hydrochloride aqueous solution is adjusted by 2-amino-2-methyl-1,3-propanediol. In an alkaline environment, dopamine hydrochloride is oxidized and polymerized into polydopamine to coat the outside of the basalt fiber, and composite basalt fiber is prepared; through polydopamine coating, a uniform film is formed on the surface of the basalt fiber, increasing the surface wettability of the basalt fiber, making it easier to interact with liquids, thereby preventing agglomeration and accumulation between fibers, improving the dispersibility of the basalt fiber in the liquid, and making it easier to be uniformly dispersed in the matrix.

[0023] 2. For the basalt fiber-reinforced concrete composite insulating and crack-resistant floor slab of the present invention, during the processing, in an alkaline environment, 1,3-bis(diglycidylaminomethyl)cyclohexane and diisopropanolamine react with the opening of the epoxy alkane ring and the alcohol hydroxyl group, and polycondensation is carried out to prepare an aqueous solution polycondensate, and alcohol hydroxyl groups are formed on the polycondensate. The epoxy alkane on KH-560 hydrolyzes and opens the ring in the reaction system to react with the alcohol hydroxyl group on the polycondensate to prepare a modifier solution containing KH-560 modification; after dispersing the composite basalt fiber in the modification liquid, purified water is added to the modification liquid. Under alkaline aqueous solution, the siloxane bond of KH-560 breaks and reacts with the active functional groups on the surface of the composite basalt fiber to modify the aqueous polycondensate on the surface of the composite basalt fiber to prepare modified basalt fiber.

[0024] 3. In the process of manufacturing the basalt fiber - reinforced concrete composite insulation and crack - resistant floor of the present invention, by optimizing the composition of the basalt fiber - reinforced concrete and creatively adding water - based resin to the basalt fiber - reinforced concrete, the adhesiveness between the aggregate particles of the concrete composition can be improved. In the basalt fiber - reinforced concrete, the water - based polycondensate modified on the surface of the composite basalt fiber dissolves and merges with the water - based resin, forming a three - dimensional cross - linked basalt fiber - reinforced structure in the floor layer, thereby improving the crack - resistance of the ground; both the water - based resin and the basalt fiber are good insulating materials, and the doping of the water - based resin and the basalt fiber effectively improves the insulation performance of the ground; in the process of preparing the basalt fiber - reinforced concrete, by optimizing the composition of quartz sand with different particle sizes to prepare coarse aggregate, the fine and coarse aggregates in the concrete are combined with the water - based resin and the modified basalt fiber to fill the micropores in the concrete, reducing the risk of water and solute penetration. While reducing humidity penetration, the durability of the composite insulation and crack - resistant floor is improved. Detailed implementation manners

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1

[0027] This embodiment provides a preparation method for a basalt fiber - reinforced concrete composite insulation and crack - resistant floor:

[0028] S1. Prepare composite basalt fiber

[0029] Select basalt fibers with a wavy shape, a length of 20 - 30 mm, and a diameter of 2 - 5 mm;

[0030] Weigh: 100 g of basalt fiber and 2500 mL of pure water and process them into a three - necked flask, ultrasonically disperse for 30 min, transfer the three - necked flask to an iron stand with mechanical stirring and stir. Add 50 g of hydrochloric acid dopamine to the three - necked flask, after stirring and dissolving, add 2 - amino - 2 - methyl - 1,3 - propanediol to the three - necked flask, adjust the system pH = 8, raise the temperature of the three - necked flask to 40 °C, keep the temperature for 2 h, lower the temperature of the three - necked flask to room temperature, perform suction filtration, wash the filter cake with pure water until neutral, transfer the filter cake to a drying oven at 70 °C, and dry to constant weight to obtain composite basalt fiber.

[0031] S2. Prepare the modified liquid

[0032] Weigh: 150 g of 1,3-bis(diglycidylaminomethyl)cyclohexane, 500 mL of N,N-dimethylformamide and 15 g of sodium hydroxide are added to a three-necked flask under nitrogen protection and stirred. The temperature of the three-necked flask is raised to 55 °C, 50 g of diisopropanolamine is added to the three-necked flask, and the reaction is carried out at a constant temperature for 3 h. 10 g of KH-560 is added to the three-necked flask, and the reaction is carried out at a constant temperature for 2 h. Then the temperature is lowered to room temperature to obtain a modified solution.

[0033] S3. Preparation of modified basalt fibers

[0034] Weigh: 500 g of the modified solution and 30 g of composite basalt fibers are added to a three-necked flask and stirred. The temperature of the three-necked flask is raised to 45 °C, 20 g of purified water is added to the three-necked flask, and the reaction is carried out at a constant temperature for 2 h. Then the temperature of the three-necked flask is lowered to room temperature, and filtration is carried out. The filter cake is washed with purified water until neutral, then rinsed once with absolute ethanol and then dried by suction. The filter cake is transferred to an oven at 60 °C and dried to a constant weight to obtain modified basalt fibers.

[0035] S4. Preparation of basalt fiber-reinforced concrete

[0036] Mix large-size quartz sand with a particle size of 8 - 10 mm, medium-size quartz sand with a particle size of 5 - 8 mm and small-size quartz sand with a particle size of 2 - 5 mm evenly according to a weight ratio of 3:1:1 to obtain coarse aggregate;

[0037] Use quartz sand crystal powder with a particle size less than 1 mm as fine aggregate;

[0038] Weigh: 9 kg of coarse aggregate, 4 kg of fine aggregate, 3 kg of Portland cement of type IP42.5, 1.5 kg of waterborne epoxy resin CM3801, 50 g of polycarboxylate water reducer of type DH-4005 and 3.5 kg of drinking water are added to a concrete mixing tank and stirred for 10 min. 0.4 kg of modified basalt fibers is added to the concrete mixing tank and stirring is continued for 20 min to obtain basalt fiber-reinforced concrete.

[0039] S5. Pouring and forming of the floor layer

[0040] Lay the basalt fiber-reinforced concrete on the cement floor, and evenly moisten the concrete surface every 3 h. After the basalt fiber-reinforced concrete is completely solidified, a floor layer with a thickness of 8 - 10 cm is formed.

[0041] Example 2

[0042] This example provides a preparation method of a basalt fiber-reinforced concrete composite insulation and crack-resistant floor:

[0043] S1. Preparation of composite basalt fibers

[0044] Select basalt fibers with a wavy shape, a length of 20 - 30 mm, and a diameter of 2 - 5 mm.

[0045] Weigh: 100 g of basalt fibers and 2500 mL of pure water and add them to a three - necked flask. Ultrasonically disperse for 40 min, then transfer the three - necked flask to an iron stand with mechanical stirring and stir. Add 50 g of hydrochloric acid dopamine to the three - necked flask. After stirring and dissolving, add 2 - amino - 2 - methyl - 1,3 - propanediol to adjust the system pH to 8.5. Raise the temperature of the three - necked flask to 43 °C, keep the temperature for 2.5 h, then lower the temperature of the three - necked flask to room temperature. Filter by suction, wash the filter cake with pure water until neutral, transfer the filter cake to a drying oven at 75 °C, and dry to a constant weight to obtain composite basalt fibers.

[0046] S2. Prepare the modification liquid

[0047] Weigh: 150 g of 1,3 - bis(diglycidylaminomethyl)cyclohexane, 500 mL of N,N - dimethylformamide, and 15 g of sodium hydroxide and add them to a nitrogen - protected three - necked flask and stir. Raise the temperature of the three - necked flask to 60 °C, add 50 g of diisopropanolamine to the three - necked flask, keep the temperature for 3.5 h, then add 10 g of KH - 560 to the three - necked flask, keep the temperature for 2.5 h, and cool to room temperature to obtain the modification liquid.

[0048] S3. Prepare the modified basalt fibers

[0049] Weigh: 500 g of the modification liquid and 30 g of composite basalt fibers and add them to a three - necked flask and stir. Raise the temperature of the three - necked flask to 50 °C, add 20 g of purified water to the three - necked flask, keep the temperature for 2.5 h, then lower the temperature of the three - necked flask to room temperature. Filter by suction, wash the filter cake with purified water until neutral, then rinse once with absolute ethanol and filter dry. Transfer the filter cake to a drying oven at 65 °C and dry to a constant weight to obtain the modified basalt fibers.

[0050] S4. Prepare basalt fiber - reinforced concrete

[0051] Mix large - sized quartz sand with a particle size of 8 - 10 mm, medium - sized quartz sand with a particle size of 5 - 8 mm, and small - sized quartz sand with a particle size of 2 - 5 mm evenly according to a weight ratio of 3:1:1 to obtain coarse aggregate;

[0052] Use quartz sand crystal powder with a particle size less than 1 mm as fine aggregate;

[0053] Weigh: 9.5 kg of coarse aggregate, 5 kg of fine aggregate, 3.5 kg of Portland cement of type IP42.5, 1.7 kg of waterborne epoxy resin CM3801, 65 g of amino high-performance water reducer, and 4 kg of drinking water, add them to a concrete mixing tank, stir for 13 min, add 0.5 kg of modified basalt fiber to the concrete mixing tank, and continue to stir for 25 min to obtain basalt fiber-reinforced concrete.

[0054] S5. Pour and form the floor layer

[0055] Lay the basalt fiber-reinforced concrete on the cement floor, evenly moisten the concrete surface every 4 h, and wait for the basalt fiber-reinforced concrete to completely solidify to form a floor layer with a thickness of 8 - 10 cm.

[0056] Example 3

[0057] This example provides a preparation method for a basalt fiber-reinforced concrete composite insulating and crack-resistant floor:

[0058] S1. Prepare composite basalt fiber

[0059] Select basalt fibers with a wavy shape, a length of 20 - 30 mm, and a diameter of 2 - 5 mm;

[0060] Weigh: 100 g of basalt fiber and 2500 mL of pure water, add them to a three-necked flask, ultrasonically disperse for 50 min, transfer the three-necked flask to an iron stand with mechanical stirring, add 50 g of hydrochloric acid dopamine to the three-necked flask, stir and dissolve, then add 2-amino-2-methyl-1,3-propanediol to the three-necked flask, adjust the system pH = 9, raise the temperature of the three-necked flask to 45 °C, keep the temperature for 3 h, lower the temperature of the three-necked flask to room temperature, filter by suction, wash the filter cake with pure water until neutral, transfer the filter cake to a drying oven at 80 °C, and dry to constant weight to obtain composite basalt fiber.

[0061] S2. Prepare the modification liquid

[0062] Weigh: 150 g of 1,3-bis(diglycidylaminomethyl)cyclohexane, 500 mL of N,N-dimethylformamide, and 15 g of sodium hydroxide, add them to a three-necked flask under nitrogen protection and stir, raise the temperature of the three-necked flask to 65 °C, add 50 g of diisopropanolamine to the three-necked flask, keep the temperature for 4 h, add 10 g of KH-560 to the three-necked flask, keep the temperature for 3 h, and cool to room temperature to obtain the modification liquid.

[0063] S3. Prepare modified basalt fiber

[0064] Weigh: 500 g of the modified liquid and 30 g of the composite basalt fiber, add them to a three-necked flask and stir. Raise the temperature of the three-necked flask to 55 °C, add 20 g of purified water to the three-necked flask, keep the temperature for reaction for 3 h, lower the temperature of the three-necked flask to room temperature, carry out suction filtration. After washing the filter cake with purified water until it is neutral, rinse it once with absolute ethanol and then drain it by suction. Transfer the filter cake to a drying oven at 70 °C and dry it to constant weight to obtain the modified basalt fiber.

[0065] S4. Prepare basalt fiber-reinforced concrete

[0066] Mix large-sized quartz sand with a particle size of 8 - 10 mm, medium-sized quartz sand with a particle size of 5 - 8 mm, and small-sized quartz sand with a particle size of 2 - 5 mm evenly according to a weight ratio of 3:1:1 to obtain coarse aggregate;

[0067] Use quartz sand crystal powder with a particle size less than 1 mm as fine aggregate;

[0068] Weigh: 10 kg of coarse aggregate, 6 kg of fine aggregate, 4 kg of Portland cement of type IP42.5, 1.8 kg of waterborne epoxy resin CM3801, 80 g of polycarboxylate water reducer of type DH - 4005, and 4.5 kg of drinking water, add them to a concrete mixing tank and stir for 15 min. Add 0.6 g of modified basalt fiber to the concrete mixing tank and continue stirring for 30 min to obtain basalt fiber-reinforced concrete.

[0069] S5. Pour and form the floor layer

[0070] Lay the basalt fiber-reinforced concrete on the cement floor, evenly moisten the concrete surface every 5 h. After the basalt fiber-reinforced concrete is completely solidified, a floor layer with a thickness of 8 - 10 cm is formed.

[0071] Comparative Example 1

[0072] The difference between this comparative example and Example 1 is that steps S2 and S3 are cancelled, and the composite basalt fiber is used to equally replace the modified basalt fiber in step S4.

[0073] Comparative Example 2

[0074] The difference between this comparative example and Example 1 is that the waterborne epoxy resin is not added in step S4.

[0075] Comparative Example 3

[0076] The difference between this comparative example and Example 1 is that steps S1, S2, and S3 are cancelled, and the basalt fiber in step S1 is used to equally replace the modified basalt fiber in step S4.

[0077] Comparative Example 4

[0078] The difference between this comparative example and Example 1 is that the coarse aggregate in step S4 is composed of large-size quartz sand with a particle size of 8-10 mm and medium-size quartz sand with a particle size of 5-8 mm at a weight ratio of 3:1.

[0079] Performance test:

[0080] The crack resistance and insulation performance of the floor layers prepared in Examples 1-3 and Comparative Examples 1-4 were tested. Among them, for the insulation performance, referring to the standard HG / T 3331-2012 "Determination Method for Volume Resistivity and Surface Resistivity of Insulating Paint Films", the volume resistivity and surface resistivity of the floor layer were measured. For the crack resistance performance, referring to the standards GB / T16777-2008 "Test Methods for Building Waterproof Coatings", HG / T3829-2006 "Floor Coatings", and GB / T50081-2019 "Standard for Test Methods of Physical and Mechanical Properties of Concrete", the tensile strength, compressive strength and water absorption rate of the specimens were tested. The specific test results are shown in the following table:

[0081]

[0082]

[0083] Data analysis:

[0084] By comparing and analyzing the data in the above table, the volume resistivity of the concrete floor layer specimens prepared in Examples 1-3 of the present invention reached 1.06×10 12 Ω·cm, the surface resistance reached 1.09×10 12 Ω, the tensile strength reached 26.9 MPa, the compressive strength reached 38.9 MPa, and the water absorption rate was reduced to 1.1%. All the test data were better than those of Comparative Examples 1-4, indicating that the concrete floor layer prepared by the present invention not only has excellent insulation performance, but also has high tensile strength and compressive strength, low water absorption rate, good crack resistance performance of the concrete floor layer, and is more suitable for DC traction power supply insulating floors.

[0085] The above content is only an example and description of the structure of the present invention. Those skilled in the art of the present technology make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

[0086] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0087] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Basalt fiber reinforced concrete composite insulation and crack-resistant floor, characterized in that, It is cast from basalt fiber reinforced concrete, and the basalt fiber reinforced concrete includes the following raw materials by weight: 900-1000 parts of coarse aggregate, 400-600 parts of fine aggregate, 300-400 parts of portland cement, 150-180 parts of epoxy resin, 5-8 parts of water reducing agent, 350-450 parts of drinking water, and 40-60 parts of modified basalt fiber; The modified basalt fiber is processed by the following steps: S1. Add basalt fiber and pure water into a three-necked flask, ultrasonically disperse for 30-50 min, transfer the three-necked flask to an iron stand with mechanical stirring, add hydrochloric acid dopamine into the three-necked flask, stir and dissolve it, then add 2-amino-2-methyl-1,3-propanediol into the three-necked flask, adjust the system pH = 8-9, raise the temperature of the three-necked flask to 40-45 °C, keep warm and react for 2-3 h, and perform post-treatment to obtain composite basalt fiber; S2. Add the modified liquid and composite basalt fiber into a three-necked flask and stir, raise the temperature of the three-necked flask to 45-55 °C, add purified water into the three-necked flask, keep warm and react for 2-3 h, and perform post-treatment to obtain modified basalt fiber; The preparation method of the modified liquid is: Add 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N-dimethylformamide, and sodium hydroxide into a three-necked flask protected by nitrogen and stir, raise the temperature of the three-necked flask to 55-65 °C, add diisopropanolamine into the three-necked flask, keep warm and react for 3-4 h, add KH-560 into the three-necked flask, keep warm and react for 2-3 h, and cool down to room temperature to obtain the modified liquid.

2. The basalt fiber reinforced concrete composite insulating and crack-resistant floor according to claim 1, characterized in that, The coarse aggregate is composed of large particle size quartz sand with a particle size of 8-10 mm, medium particle size quartz sand with a particle size of 5-8 mm, and small particle size quartz sand with a particle size of 2-5 mm in a weight ratio of 3:1:

1. The fine aggregate is quartz sand crystal powder with a particle size less than 1 mm. The epoxy resin is a commercially available water-based epoxy resin, model: water-based epoxy resin CM3801. The water reducing agent is one of DH-4005 type polycarboxylate water reducing agent and amino high-performance water reducing agent.

3. The basalt fiber reinforced concrete composite insulating and crack-resistant floor according to claim 1, characterized in that, In step S1, the dosage ratio of basalt fiber, pure water, and hydrochloric acid dopamine is 2 g:50 mL:1 g. The post-treatment operation includes: after the reaction is completed, lower the temperature of the three-necked flask to room temperature, perform suction filtration, wash the filter cake with pure water until neutral, transfer the filter cake to a drying oven at 70-80 °C, and dry to constant weight to obtain composite basalt fiber.

4. The basalt fiber reinforced concrete composite insulating and crack-resistant floor according to claim 1, characterized in that, The dosage ratio of 1,3-bis(diglycidylaminomethyl)cyclohexane, N,N-dimethylformamide, sodium hydroxide, diisopropanolamine, and KH-560 is 15 g:50 mL:1.5 g:5 g:1 g.

5. The basalt fiber reinforced concrete composite insulating and crack-resistant floor according to claim 1, wherein, In step S2, the dosage ratio of the modified liquid, composite basalt fiber, and purified water is 10 g:3 g:2 g. The post-treatment operation includes: after the reaction is completed, lower the temperature of the three-necked flask to room temperature, perform suction filtration, wash the filter cake with purified water until neutral, then rinse it once with absolute ethanol and suction dry, transfer the filter cake to a drying oven at 60-70 °C, and dry to constant weight to obtain modified basalt fiber.

6. The preparation method of the basalt fiber reinforced concrete composite insulating and crack-resistant floor according to any one of claims 1-5, characterized in that, It includes the following steps: Step 1: Add coarse aggregate, fine aggregate, portland cement, epoxy resin, water reducer and drinking water into a concrete mixing tank, stir for 10 - 15 min, add modified basalt fiber into the concrete mixing tank, and continue to stir for 20 - 30 min to obtain basalt fiber reinforced concrete; Step 2: Lay the basalt fiber reinforced concrete on the cement floor, evenly moisten the concrete surface every 3 - 5 h. After the basalt fiber reinforced concrete is completely solidified, a floor layer with a thickness of 8 - 10 cm is formed.

Images