Basalt fiber reinforced cement-based composite material and preparation method thereof

Abstract

The invention relates to the technical field of cement-based composite materials, in particular to a basalt fiber reinforced cement-based composite material and a preparation method thereof. The basalt fiber reinforced cement-based composite material is prepared from the following raw materials in parts by weight: 300 to 400 parts of fine aggregate, 200 to 300 parts of sulphoaluminate cement, 80 to 120 parts of water, 40 to 60 parts of filler, 30 to 40 parts of powder, 30 to 40 parts of silica fume and 1 to 3 parts of water reducing agent. According to the preparation method, nano-cellulose is prepared after corbicula fluminea is treated, the nano-cellulose can be filled in the material to play a role in enhancing toughness, and meanwhile, the porosity of a material interface transition area can be reduced by mixing and adding the phytic acid modified starch and utilizing the complexing effect of phosphate groups of the phytic acid modified starch; further, all the component materials are combined more uniformly, stress transfer among all the component materials is smoother, and the effect of improving the strength performance of the cement-based composite material is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cement-based composite materials, in particular to a basalt fiber reinforced cement-based composite material and a preparation method thereof. BACKGROUND

[0002] The cement-based composite material is a multi-phase composite material made of cement as a cementitious material, adding aggregates and functional components, and is widely used in the fields of building structures, roads and bridges, water conservancy projects, etc., and is one of the core materials of modern civil engineering.

[0003] In the prior art, the cement-based composite material is usually prepared by adding high-hardness aggregates to improve the strength performance of the cement-based composite material. However, the addition of multi-component materials will hinder the stress transmission of different materials, so that the overall stress of the cement-based composite material is uneven, affecting its strength performance. Based on this, the present application provides a basalt fiber reinforced cement-based composite material and a preparation method thereof. SUMMARY

[0004] The purpose of the present application is to provide a basalt fiber reinforced cement-based composite material and a preparation method thereof. The cement-based composite material prepared by the present application not only has good compressive strength performance, but also has excellent flexural strength performance, effectively improving the use performance of the cement-based composite material.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] In a first aspect, the present application provides a basalt fiber reinforced cement-based composite material, comprising the following raw materials by weight: 300-400 parts of fine aggregate, 200-300 parts of sulphoaluminate cement, 80-120 parts of water, 40-60 parts of filler, 30-40 parts of powder, 30-40 parts of silica fume, and 1-3 parts of water reducing agent.

[0007] The preparation of the filler comprises the following steps:

[0008] S1: base material preparation, the raw material of the base material is basalt fiber, and the base material is prepared after the basalt fiber is treated;

[0009] S2: additive preparation, the raw material of the additive is mussel wood, and the additive is prepared after the mussel wood is pretreated and further treated;

[0010] S3: mixing treatment, the base material and the additive are mixed and treated to obtain a mixed material;

[0011] S4: preparation treatment, the mixed material is further treated to obtain the filler.

[0012] Further, the method for preparing the base material is that the basalt fiber is added into a mixer, KH550, anhydrous ethanol and deionized water are added into the mixer, the mixer is set to stir at 200-300 r / min for 20-30 min, the obtained product is washed, and then is sent into an oven, the oven is set to dry at 60-80 ℃ for 10-12 h to obtain the base material, wherein the mass ratio of KH550, anhydrous ethanol and deionized water is 1:(20-30):(250-300), and the mass of the deionized water is 60-80% of the mass of the basalt fiber.

[0013] Further, the method for pretreating the wood is that the wood is selected from the wood scraps of a chopping board factory, the wood is ground after being recovered, the grinding particle size is 200-300 μm, the obtained product is washed, and then is sent into an oven, the oven is set to dry at 50-60 ℃ for 6-8 h to complete the pretreatment of the wood.

[0014] Further, the method for preparing the additive is that the pretreated wood is added into a mixer, sodium hydroxide, urea and deionized water are added into the mixer, the mixer is set to stir at 300-400 r / min for 30-40 min, the obtained product is frozen at a temperature of (-15)-(-25) ℃ for 4-6 h, and then is thawed at room temperature for 1-2 h, the freezing and thawing are cycled for 3-5 times, the obtained product is sent into a high-pressure homogenizer, the high-pressure homogenizer is set to process at 100-200 MPa for 6-10 min to obtain a slurry, and the slurry is further treated to obtain the additive, wherein the mass ratio of sodium hydroxide, urea and deionized water is 1:(2-4):(40-60), and the mass of the deionized water is 2-4 times of the mass of the pretreated wood.

[0015] Further, the method for mixing is that the method for treating the slurry is that the slurry and carboxymethyl chitosan are added into a reaction kettle, the reaction kettle is set to be heated to 45-55 ℃, the stirring speed is set to 400-600 r / min, and the obtained product is stirred at constant temperature for 20-30 min, then polyethyleneimine solution is added into the reaction kettle, stirring is performed at 200-300 r / min at room temperature for 10-20 min, the obtained product is added into a shearing emulsifier, and the shearing emulsifier is set to process at 10 000-12 000 r / min for 30-40 min to obtain the additive, wherein the mass of the carboxymethyl chitosan is 6-8% of the mass of the slurry, the mass concentration of the polyethyleneimine solution is 2%, and the mass of the polyethyleneimine solution is 3-5% of the mass of the slurry.

[0016] Further, the mixing treatment method is that the base material, the additive, the phytic acid modified starch and water are added into a mixer, the mixer is set to stirring treatment at 400-600 r / min for 50-60 min, the obtained product is sent into an oven, the oven is set to drying treatment at 60-70 DEG C for 10-20 min, the mixing treatment is completed, and the mixed material is prepared.

[0017] Further, the mass ratio of the base material, the additive, the phytic acid modified starch and water is 1:(0.5-0.6):(0.1-0.2):(0.2-0.4).

[0018] Further, the preparation treatment method is that the mixed material, sucrose powder, maleic anhydride and graphene dispersion liquid are added into a reaction kettle, the reaction kettle is set to temperature rising to 40-50 DEG C, the rotating speed is 400-600 r / min, and constant temperature stirring treatment is conducted for 20-30 min, and the filler is prepared, wherein the mass ratio of the mixed material, the sucrose powder, the maleic anhydride and the graphene dispersion liquid is 1:(0.06-0.08):(0.05-0.07):(0.06-0.08).

[0019] Further, the fine aggregate is river sand, and the powder is a mixture of quartz sand, mineral powder and silica fume, and the mass ratio of the quartz sand, the mineral powder and the silica fume is 1:(0.2-0.4):(0.4-0.6).

[0020] Secondly, the application further provides a preparation method of the basalt fiber reinforced cement-based composite material, which comprises the following steps: weighing the fine aggregate, the cement, the filler and the powder according to needs, adding the fine aggregate, the cement, the filler and the powder into a mixer, setting the mixer to stirring treatment at 600-800 r / min for 40-50 min, adding water and a water reducing agent after the stirring treatment is completed, setting the mixer to stirring treatment at 120-160 r / min for 10-20 min, and preparing the cement-based composite material.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] 1. In the preparation process of the cement-based composite material, the filler is added, the basalt fiber is subjected to the mixing treatment of KH550, the chelate structure can be formed on the surface of the basalt fiber, the combination strength of the basalt fiber and other materials is improved, the nano cellulose is prepared from the treated clam wood and can be filled in the material to play a role in enhancing the toughness, the phytic acid modified starch is mixed and added, the phosphoric acid group of the phytic acid modified starch is used for complexation, the porosity of the material interface transition zone is reduced, the combination of the component materials is more uniform, the stress transmission between the component materials is more smooth, and the strength performance of the cement-based composite material is improved.

[0023] 2、In the application, through the cyclic freezing and high pressure homogenization treatment of the powdered mussel wood, efficient dissociation of wood fibers can be realized, in the treatment process of cyclic freezing, the water in the intercellular space rapidly crystallizes and expands, and the expansion stress generated during the growth of ice crystals can destroy the lignin structure, so that the cellulose microfilaments are fully exposed, effectively improving the bonding strength with other added materials, and then playing a role in improving the strength performance of the cement-based composite material. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 To propose a basalt fiber reinforced cement-based composite material and its preparation method. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the application will be described below in conjunction with the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0026] It should be noted that the raw materials used in the following embodiments are commercially available.

[0027] Embodiment one:

[0028] Raw material selection: 300 parts of fine aggregate, 200 parts of sulphoaluminate cement, 80 parts of water, 40 parts of filler, 30 parts of powder, 30 parts of silica fume, and 1 part of water reducing agent;

[0029] Preparation of filler:

[0030] S1: Preparation of base material, the raw material of the base material is basalt fiber, after treatment of the basalt fiber, the base material is prepared;

[0031] S2: Preparation of additive material, the raw material of the additive material is mussel wood, after pretreatment of the mussel wood, the additive material is prepared;

[0032] S3: Mixing treatment, the base material and the additive material are mixed and treated to obtain a mixed material;

[0033] S4: Preparation treatment, the mixed material is further treated to obtain the filler.

[0034] The method for preparing the base material is that basalt fibers are added into a mixer, KH550, anhydrous ethanol and deionized water are added into the mixer, the mixer is set to stir at 200 r / min for 20 min, the obtained product is washed, and then is sent into an oven, the oven is set to dry at 60℃ for 10 h to prepare the base material, wherein the mass ratio of KH550, anhydrous ethanol and deionized water is 1:(20):(250), and the mass of the deionized water is 60% of the mass of the basalt fibers.

[0035] The method for pretreating the Eomei wood is that the Eomei wood is selected as the scraps of a cutting board factory, the Eomei wood is ground after being recovered, the grinding particle size is 200 μm, the obtained product is cleaned, and then is sent into an oven, the oven is set to dry at 50℃ for 6 h to complete the pretreatment of the Eomei wood.

[0036] The method for preparing the additive is that the pretreated Eomei wood is added into a mixer, sodium hydroxide, urea and deionized water are added into the mixer, the mixer is set to stir at 300 r / min for 30 min, the obtained product is frozen, the freezing temperature is (-15)~℃, the freezing time is 4 h, the product is thawed at room temperature for 1 h after the freezing treatment, the freezing and thawing treatment is cycled for 3 times, the obtained product is sent into a high-pressure homogenizer, the high-pressure homogenizer is set to 100 MPa for 6 min to prepare the slurry, and the slurry is further treated to prepare the additive, wherein the mass ratio of sodium hydroxide, urea and deionized water is 1:(2):(40), and the mass of the deionized water is 2 times of the mass of the pretreated Eomei wood.

[0037] The method for mixing the slurry is that the slurry and carboxymethyl chitosan are added into a reaction kettle, the reaction kettle is set to be heated to 45℃, the stirring speed is 400 r / min, and the constant-temperature stirring treatment is performed for 20 min, then polyethyleneimine solution is added into the reaction kettle, stirring treatment is performed at room temperature for 10 min at a speed of 200 r / min, the obtained product is added into a shearing emulsifier, and treatment is performed at a speed of 10000 r / min for 30 min to prepare the additive, wherein the mass of the carboxymethyl chitosan is 6% of the mass of the slurry, the mass concentration of the polyethyleneimine solution is 2%, and the mass of the polyethyleneimine solution is 3% of the mass of the slurry.

[0038] The method for mixing the slurry is that the slurry and carboxymethyl chitosan are added into a reaction kettle, the reaction kettle is set to be heated to 45℃, the stirring speed is 400 r / min, and the constant-temperature stirring treatment is performed for 20 min, then polyethyleneimine solution is added into the reaction kettle, stirring treatment is performed at room temperature for 10 min at a speed of 200 r / min, the obtained product is added into a shearing emulsifier, and treatment is performed at a speed of 10000 r / min for 30 min to prepare the additive, wherein the mass of the carboxymethyl chitosan is 6% of the mass of the slurry, the mass concentration of the polyethyleneimine solution is 2%, and the mass of the polyethyleneimine solution is 3% of the mass of the slurry.

[0039] The mass ratio of the base material, the additive, the phytic acid modified starch and water is 1:(0.5):(0.1):(0.2).

[0040] The preparation method of the preparation process is that the mixture, sucrose powder, maleic anhydride and graphene dispersion liquid are added into a reaction kettle, the reaction kettle is set to be heated to 40℃, the rotating speed is 400r / min, and constant temperature stirring treatment is carried out for 20min to prepare the filler, wherein the mass ratio of the mixture, sucrose powder, maleic anhydride and graphene dispersion liquid is 1:(0.06):(0.05):(0.06).

[0041] The fine aggregate is river sand, and the powder is a mixture of quartz sand, mineral powder and silica fume, and the mass ratio of the quartz sand, mineral powder and silica fume is 1:(0.2):(0.4).

[0042] The basalt fiber reinforced cement-based composite material is prepared by weighing the fine aggregate, cement, filler and powder according to the requirement, adding them into a mixer, setting the mixer to stir at 600r / min for 40min, adding water and water reducing agent after the stirring treatment is completed, and setting the mixer to stir at 120r / min for 10min to prepare the cement-based composite material.

[0043] Example two:

[0044] Raw material selection: 350 parts of fine aggregate, 250 parts of sulphoaluminate cement, 100 parts of water, 50 parts of filler, 35 parts of powder, 35 parts of silica fume and 2 parts of water reducing agent;

[0045] Preparation of the filler:

[0046] S1: Preparation of the base material, the raw material of the base material is basalt fiber, and the base material is prepared after the basalt fiber is treated;

[0047] S2: Preparation of the additive material, the raw material of the additive material is mussel wood, and the additive material is prepared after the mussel wood is pretreated and further treated;

[0048] S3: Mixing treatment, the base material and the additive material are mixed to prepare the mixture;

[0049] S4: Preparation treatment, the mixture is further treated to prepare the filler.

[0050] The preparation method of the base material is that the basalt fiber is added into a mixer, KH550, anhydrous ethanol and deionized water are added into the mixer, the mixer is set to stir at 250r / min for 25min, the obtained product is washed, and then is sent into an oven, the oven is set to dry at 70℃ for 11h to prepare the base material, wherein the mass ratio of KH550, anhydrous ethanol and deionized water is 1:(25):(270), and the mass of the deionized water is 70% of the basalt fiber.

[0051] The pretreatment method of the mollusc wood is as follows: the mollusc wood is selected from the scraps of a cutting board factory, the mollusc wood is ground after being recycled, the grinding particle size is 250 microns, the obtained product is cleaned, and then is sent into an oven, the oven is set to 55 DEG C for drying treatment for 7 hours, and the pretreatment of the mollusc wood is completed.

[0052] The method for preparing the additive is as follows: the pretreated mollusc wood is added into a mixer, sodium hydroxide, urea and deionized water are added into the mixer, the mixer is set to 350 r / min for stirring treatment for 35 minutes, the obtained product is subjected to freezing treatment, the freezing temperature is (-20) DEG C, the freezing time is 5 hours, the obtained product is placed in a normal temperature environment for thawing for 1.5 hours after the freezing treatment, the freezing and thawing treatment is cycled for 4 times, the obtained product is sent into a high-pressure homogenizer, the high-pressure homogenizer is set to 150 MPa for treatment for 8 minutes, and the slurry is prepared, and the additive is prepared by further treating the slurry, wherein the mass ratio of sodium hydroxide, urea and deionized water is 1:(3):(50), and the mass of the deionized water is 3 times that of the pretreated mollusc wood.

[0053] The method for mixing the slurry is as follows: the slurry and carboxymethyl chitosan are added into a reaction kettle, the reaction kettle is set to 50 DEG C, the rotating speed is 500 r / min, and constant temperature stirring treatment is conducted for 25 minutes, then polyethyleneimine solution is added into the reaction kettle, stirring treatment is conducted at normal temperature, the rotating speed is set to 250 r / min, and the stirring treatment time is 15 minutes, the obtained product is added into a shearing emulsifier, the rotating speed is set to 11000 r / min, and the treatment time is 35 minutes, and the additive is prepared, wherein the mass of the carboxymethyl chitosan is 7% of the mass of the slurry, the mass concentration of the polyethyleneimine solution is 2%, and the mass of the polyethyleneimine solution is 4% of the mass of the slurry.

[0054] The method for mixing the base material, the additive, the phytic acid modified starch and water is as follows: the base material, the additive, the phytic acid modified starch and water are added into a mixer, the mixer is set to 500 r / min for stirring treatment for 55 minutes, the obtained product is sent into an oven, the oven is set to 65 DEG C for drying treatment for 15 minutes, the mixing treatment is completed, and the mixed material is prepared.

[0055] The mass ratio of the base material, the additive, the phytic acid modified starch and water is 1:(0.55):(0.15):(0.3).

[0056] The method for preparing the filler is as follows: the mixed material, sucrose powder, maleic anhydride and graphene dispersion liquid are added into a reaction kettle, the reaction kettle is set to 45 DEG C, the rotating speed is 500 r / min, and constant temperature stirring treatment is conducted for 25 minutes, and the filler is prepared, wherein the mass ratio of the mixed material, sucrose powder, maleic anhydride and graphene dispersion liquid is 1:(0.07):(0.06):(0.07).

[0057] The fine aggregate is river sand, and the powder is a mixture of quartz sand, mineral powder and silica fume, and the mass ratio of the quartz sand, the mineral powder and the silica fume is 1:(0.3):(0.5).

[0058] Basalt fiber reinforced cement-based composite material preparation: the fine aggregate, cement, filler, powder are weighed as needed and added into a mixer, the mixer is set to 700r / min for stirring for 45min, after the stirring treatment is completed, water and water reducing agent are added, the mixer is set to 140r / min for stirring for 15min, and the cement-based composite material is prepared.

[0059] Example three:

[0060] Raw material selection: 400 parts of fine aggregate, 300 parts of sulphoaluminate cement, 120 parts of water, 60 parts of filler, 40 parts of powder, 40 parts of silica fume, and 3 parts of water reducing agent;

[0061] Filler preparation:

[0062] S1: base material preparation, the raw material of the base material is basalt fiber, after the basalt fiber is treated, the base material is prepared;

[0063] S2: additive preparation, the raw material of the additive is mussel wood, after the mussel wood is pretreated, it is further treated to prepare the additive;

[0064] S3: mixing treatment, the base material and the additive are mixed to prepare a mixture;

[0065] S4: preparation treatment, the mixture is further treated to prepare the filler.

[0066] The method for preparing the base material is that the basalt fiber is added into a mixer, KH550, anhydrous ethanol and deionized water are added into the mixer, the mixer is set to 300r / min for stirring for 30min, the obtained product is washed, then is sent into an oven, the oven is set to 80℃ for drying for 12h to prepare the base material, wherein the mass ratio of KH550, anhydrous ethanol and deionized water is 1:(30):(300), and the mass of the deionized water is 80% of the mass of the basalt fiber.

[0067] The pretreatment method of the mussel wood is that the mussel wood is selected from the scraps of a cutting board processing factory, the mussel wood is ground after being recovered, the grinding particle size is 300μm, the obtained product is washed, then is sent into an oven, the oven is set to 60℃ for drying for 8h to complete the pretreatment of the mussel wood.

[0068] The method for preparing the additive is that the pretreated Hua wood is added into a mixer, sodium hydroxide, urea and deionized water are added into the mixer, the mixer is set to stir at 400 r / min for 40 min, the obtained product is subjected to freezing treatment, the freezing temperature is (-25) ℃, the freezing time is 6 h, after the freezing treatment, the product is placed in a normal temperature environment for thawing for 2 h, the freezing and thawing treatment is cycled for 5 times, the obtained product is sent into a high-pressure homogenizer, the high-pressure homizer is set to 200 MPa, and the treatment time is 10 min, the slurry is prepared, and the additive is prepared by further processing the slurry, wherein the mass ratio of sodium hydroxide, urea and deionized water is 1:(4):(60), and the mass of the deionized water is 4 times that of the pretreated Hua wood.

[0069] The method for mixing and processing is that the slurry and carboxymethyl chitosan are added into a reaction kettle, the reaction kettle is set to be heated to 55 ℃, the rotating speed is 600 r / min, and constant-temperature stirring treatment is performed for 30 min, then polyethyleneimine solution is added into the reaction kettle, stirring treatment is performed at room temperature and at a rotating speed of 300 r / min for 20 min, the obtained product is added into a shearing emulsifier, and treatment is performed at a rotating speed of 12000 r / min for 40 min, so that the additive is prepared, wherein the mass of the carboxymethyl chitosan is 8% of the mass of the slurry, the mass concentration of the polyethyleneimine solution is 2%, and the mass of the polyethyleneimine solution is 5% of the mass of the slurry.

[0070] The method for mixing and processing is that the base material, the additive, the phytic acid modified starch and water are added into a mixer, the mixer is set to stir at 600 r / min for 60 min, the obtained product is sent into an oven, the oven is set to be dried at 70 ℃ for 20 min, the mixing and processing is completed, and the mixed material is prepared.

[0071] The mass ratio of the base material, the additive, the phytic acid modified starch and water is 1:(0.6):(0.2):(0.4).

[0072] The method for preparing and processing is that the mixed material, sucrose powder, maleic anhydride and graphene dispersion liquid are added into a reaction kettle, the reaction kettle is set to be heated to 50 ℃, the rotating speed is 600 r / min, and constant-temperature stirring treatment is performed for 30 min, so that the filler is prepared, wherein the mass ratio of the mixed material, the sucrose powder, the maleic anhydride and the graphene dispersion liquid is 1:(0.08):(0.07):(0.08).

[0073] The fine aggregate is river sand, and the powder is a mixture of quartz sand, mineral powder and silica fume, and the mass ratio of the quartz sand, the mineral powder and the silica fume is 1:(0.4):(0.6).

[0074] Basalt fiber reinforced cementitious composite material preparation: the fine aggregate, cement, filler, powder are weighed as needed and added into the mixer, the mixer is set to 800 r / min stirring for 50 min, after the stirring treatment, water and water reducing agent are added, the mixer is set to 160 r / min stirring for 20 min, and the cementitious composite material is prepared.

[0075] Comparative example one, the difference between this comparative example and example one is that the cycalla in this comparative example is not subjected to the cyclic freezing treatment.

[0076] Comparative example two, the difference between this comparative example and example one is that an equal amount of cycalla powder is used to replace the additive in this comparative example.

[0077] Comparative example three, the difference between this comparative example and example one is that an equal amount of basalt fiber is used to replace the filler in this comparative example.

[0078] Comparative example four, the difference between this comparative example and example one is that the filler is not contained in this comparative example.

[0079] Performance test: the cementitious composite materials prepared in example one, example two, example three, comparative example one, comparative example two, comparative example three and comparative example four are subjected to performance test, and the obtained test data are recorded in the following table:

[0080] Table 1 compressive strength test table:

[0081]

[0082] Table 2 flexural strength test table:

[0083]

[0084] In the performance test, the test method in GB / T17671-1999 is used to test the compressive strength and flexural strength of the cementitious composite materials prepared in example one, example two, example three, comparative example one, comparative example two, comparative example three and comparative example four.

[0085] It can be seen that the compressive strength and the bending strength of the cement-based composite materials prepared in Comparative Examples 1, 2, 3 and 4 are lower than those of the cement-based composite materials prepared in Example 1, 2, 3 and 4; this shows that, in the preparation process of the cement-based composite material, through the addition of fillers, the basalt fiber can form a chelate structure on its surface after being mixed with KH550, thereby improving the bonding strength of the basalt fiber and other materials, the treated clam wood can be used to prepare nano-cellulose, which can be filled in the material to play a role in enhancing the toughness, and the addition of the modified starch by phytic acid can reduce the porosity of the material interface transition zone through the complexation of the phosphate groups of the modified starch by phytic acid, so that the combination of the components is more uniform, the stress transfer between the components is smoother, and the strength performance of the cement-based composite material is improved.

[0086] Through the cyclic freezing and high-pressure homogenization treatment of the powdered clam wood, the efficient dissociation of the wood fibers can be realized, in the process of the cyclic freezing treatment, the water in the intercellular space is rapidly crystallized and expanded, the lignin structure can be damaged by using the expansion stress generated during the growth of ice crystals, so that the cellulose microfibrils are fully exposed, the bonding strength with other added materials is effectively improved, and the strength performance of the cement-based composite material is improved.

[0087] It can be known from the comparison and analysis of the related data in the table that the cement-based composite material prepared by the application has not only good compressive strength performance, but also excellent bending strength performance. Therefore, it is shown that the basalt fiber reinforced cement-based composite material provided by the application has a wider market prospect and is more suitable for promotion.

[0088] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present specification. The present specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their entire scope and equivalents.

Claims

1. A basalt fiber reinforced cementitious composite material, characterized by: The raw materials include 300-400 parts of fine aggregate, 200-300 parts of sulphoaluminate cement, 80-120 parts of water, 40-60 parts of filler, 30-40 parts of powder, 30-40 parts of silica fume, and 1-3 parts of water reducing agent; The preparation of the filler comprises the following steps: S1: base preparation, the raw materials of the base are basalt fibers, and the base is prepared after the basalt fibers are treated; S2: additive preparation, the raw materials of the additive are mussel wood, and the additive is prepared after the mussel wood is pretreated and further treated; S3: mixing treatment, the base and the additive are mixed and treated to obtain a mixture; S4: preparation treatment, the mixture is further treated to obtain the filler.

2. The basalt fiber reinforced cementitious composite material of claim 1, wherein, The method for preparing the base is as follows: the basalt fibers are added into a mixer, KH550, anhydrous ethanol and deionized water are added into the mixer, the mixer is set to stir at 200-300 r / min for 20-30 min, the obtained product is washed, and then is sent into an oven, the oven is set to dry at 60-80℃ for 10-12 h to obtain the base, wherein the mass ratio of KH550, anhydrous ethanol and deionized water is 1:(20-30):(250-300), and the mass of the deionized water is 60-80% of the mass of the basalt fibers.

3. The basalt fiber reinforced cementitious composite material of claim 1, wherein, The pretreatment method of the mussel wood is as follows: the mussel wood is selected from the scraps of a cutting board factory, the mussel wood is ground after being recovered, the grinding particle size is 200-300 μm, the obtained product is washed, and then is sent into an oven, the oven is set to dry at 50-60℃ for 6-8 h to complete the pretreatment of the mussel wood.

4. The basalt fiber reinforced cementitious composite material of claim 1, wherein, The method for preparing the additive is as follows: the pretreated mussel wood is added into a mixer, sodium hydroxide, urea and deionized water are added into the mixer, the mixer is set to stir at 300-400 r / min for 30-40 min, the obtained product is frozen at a temperature of (-15)-(-25)℃ for 4-6 h, and then is thawed at room temperature for 1-2 h, the freezing and thawing treatment is repeated for 3-5 times, the obtained product is sent into a high-pressure homogenizer, the high-pressure homogenizer is set to 100-200 MPa for 6-10 min to obtain a slurry, and the slurry is further treated to obtain the additive, wherein the mass ratio of sodium hydroxide, urea and deionized water is 1:(2-4):(40-60), and the mass of the deionized water is 2-4 times of the mass of the pretreated mussel wood.

5. The basalt fiber reinforced cementitious composite material of claim 4, wherein, The mixing treatment method is as follows: the pulp, carboxymethyl chitosan are added into a reaction kettle, the reaction kettle is set to be heated to 45-55 DEG C, the rotating speed is 400-600 r / min, constant temperature stirring treatment is carried out for 20-30 min, then polyethyleneimine solution is added into the reaction kettle, stirring treatment is carried out at room temperature and at a rotating speed of 200-300 r / min for 10-20 min, the obtained product is added into a shearing emulsifier, treatment is carried out at a rotating speed of 10000-12000 r / min for 30-40 min, and the additive is prepared, wherein the mass of carboxymethyl chitosan is 6-8% of the mass of the pulp, the mass concentration of the polyethyleneimine solution is 2%, and the mass of the polyethyleneimine solution is 3-5% of the mass of the pulp.

6. The basalt fiber reinforced cementitious composite material of claim 1, wherein, The mixing treatment method is as follows: the base material, the additive, the phytic acid modified starch and water are added into a mixer, the mixer is set to stir at a rotating speed of 400-600 r / min for 50-60 min, the obtained product is sent into an oven, the oven is set to dry at 60-70 DEG C for 10-20 min, the mixing treatment is completed, and the mixed material is prepared.

7. The basalt fiber reinforced cementitious composite material of claim 6, wherein, The mass ratio of the base material, the additive, the phytic acid modified starch and water is 1:(0.5-0.6):(0.1-0.2):(0.2-0.4).

8. The basalt fiber reinforced cementitious composite material of claim 1, wherein, The preparation treatment method is as follows: the mixed material, sucrose powder, maleic anhydride and graphene dispersion liquid are added into a reaction kettle, the reaction kettle is set to be heated to 40-50 DEG C, the rotating speed is 400-600 r / min, and constant temperature stirring treatment is carried out for 20-30 min, and the filler is prepared, wherein the mass ratio of the mixed material, the sucrose powder, the maleic anhydride and the graphene dispersion liquid is 1:(0.06-0.08):(0.05-0.07):(0.06-0.08).

9. The basalt fiber reinforced cementitious composite material of claim 1, wherein, The fine aggregate is river sand, and the powder is a mixture of quartz sand, mineral powder and silica fume, and the mass ratio of the quartz sand, the mineral powder and the silica fume is 1:(0.2-0.4):(0.4-0.6).

10. A method of manufacturing a basalt fiber reinforced cementitious composite material according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: the fine aggregate, the cement, the filler and the powder are weighed as required and added into a mixer, the mixer is set to stir at a rotating speed of 600-800 r / min for 40-50 min, after the stirring treatment is completed, water and a water reducing agent are added, the mixer is set to stir at a rotating speed of 120-160 r / min for 10-20 min, and the cement-based composite material is prepared.

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