CN108793885B - High-strength self-healing concrete - Google Patents
High-strength self-healing concrete Download PDFInfo
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- CN108793885B CN108793885B CN201810829870.8A CN201810829870A CN108793885B CN 108793885 B CN108793885 B CN 108793885B CN 201810829870 A CN201810829870 A CN 201810829870A CN 108793885 B CN108793885 B CN 108793885B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention provides a high-strength self-healing concrete which comprises the following raw materials in parts by weight: 100-120 parts of silicate cement, 30-50 parts of water, 10-20 parts of carbon dioxide foaming agent, 20-30 parts of dispersing agent, 55-65 parts of aggregate, 20-30 parts of microbial compound, 20-30 parts of modified fiber compound, 1-3 parts of phenolic antioxidant, 1-3 parts of octadecanoic acid and 4-8 parts of modified pentadiene petroleum resin. According to the high-strength self-healing concrete provided by the invention, the flexural strength and the compressive strength are increased to a certain extent through a specific proportioning and preparation method, the self-healing capability of the concrete is improved, the repairing time of the concrete is prolonged, the high-strength self-healing concrete has higher durability and compactness, the strength recovery rate of the repaired concrete is higher, the synergistic effect among the components of the high-strength self-healing concrete can be seen through the above examples and comparative examples, and when the components are replaced, the flexural strength and the compressive strength of the concrete are obviously reduced, and the recovery rate is also obviously reduced.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of building materials, in particular to high-strength self-healing concrete.
[ background of the invention ]
Concrete is a building material widely used at present, but damages can occur under the action of stress or other factors in the using process to generate micro cracks, the damages are invisible, but if the damages cannot be repaired in time, the mechanical property of the concrete can be reduced, even macro cracks can be caused, so that water permeates to cause the corrosion of reinforcing steel bars, the shock resistance of a concrete structure is reduced, and the service life of the concrete structure is prolonged.
In order to realize the crack repair of concrete, the research is wide based on microbial crack self-repair, and microbes form organic and inorganic compounds with low solubility to fill a permeable porous medium by utilizing biological action, so that the aims of reducing the permeability and repairing cracks are fulfilled. The microorganism is metabolized in a humid environment to generate urease, then the urease is hydrolyzed into ammonia gas and carbon dioxide, the carbon dioxide reacts with calcium ions dissolved in gaps in the concrete to generate calcium carbonate precipitates, but the metabolic speed of the microorganism in the prior art is difficult to control, the repairing efficiency is usually very low, the repairing effect on cracks with large crack widths is very poor, and the strength of the repaired concrete is poor.
[ summary of the invention ]
In view of this, the embodiment of the present invention provides a high-strength self-healing concrete.
The application provides a high strength self-healing concrete, the weight of the raw materials of this concrete constitutes: 100-120 parts of silicate cement, 30-50 parts of water, 10-20 parts of carbon dioxide foaming agent, 20-30 parts of dispersing agent, 55-65 parts of aggregate, 20-30 parts of microbial compound, 20-30 parts of modified fiber compound, 1-3 parts of phenolic antioxidant, 1-3 parts of octadecanoic acid and 4-8 parts of modified pentadiene petroleum resin.
Preferably, the concrete comprises the following raw materials in parts by weight: 110 parts of Portland cement, 40 parts of water, 15 parts of carbon dioxide foaming agent, 25 parts of dispersing agent, 60 parts of aggregate, 20-30 parts of microbial compound, 20-30 parts of modified fiber compound, 1-3 parts of phenolic antioxidant, 1-3 parts of octadecanoic acid and 4-8 parts of modified m-pentadiene petroleum resin.
Preferably, the dispersing agent consists of guar gum hydroxypropyl trimethyl ammonium chloride, colloidal silicon dioxide, diatomite, silicon carbide powder, fly ash and phenolic resin in a weight ratio of 2:2:8:5:3: 10; the preparation method of the dispersant comprises the following steps:
a. uniformly dispersing 2 parts of guar gum hydroxypropyl trimethyl ammonium chloride in water by weight, and uniformly stirring to obtain a solution A, wherein the water content of the solution A is 80%;
b. uniformly dispersing 2 parts of colloidal silicon dioxide in ethanol according to the parts by weight, and uniformly stirring to obtain a solution B;
c. adding the solution A into the solution B, wherein the weight ratio of the solution A to the solution B is 2:1, uniformly stirring, evaporating ethanol under reduced pressure, and spray-drying until the water content is 30% to obtain mixed slurry A;
d. dispersing 8 parts of diatomite, 5 parts of silicon carbide powder, 3 parts of fly ash and 10 parts of phenolic resin in water according to parts by weight to prepare mixed slurry B with the water content of 30%;
e. and (3) grinding the mixed slurry B in a ball mill, dropwise adding the mixed slurry A while grinding, continuously grinding for 24 hours after dropwise adding, spray-drying, and sieving to obtain the dispersing agent.
Preferably, the preparation method of the modified fiber composite comprises the following steps:
a. 40kg of polypropylene fiber and 20kg of cellulose fiber are put into a reaction kettle to be uniformly mixed, 35kg of 75 percent isopropanol aqueous solution by volume fraction is added, and 35kg of 35 percent Na by mass fraction is addedHeating OH aqueous solution and 15kg of polyethylene glycol 400 while stirring, controlling the temperature at 75-80 ℃, and stirring at the speed of 2000 r.min-1Reacting for 40 min;
b. keeping the temperature at 75-80 ℃, continuously adding 35kg of an isopropanol aqueous solution with the volume fraction of 95%, then adding 35kg of a NaOH aqueous solution with the mass fraction of 50% and 25kg of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, and finally adding 1kg of a KI aqueous solution with the mass fraction of 50%, wherein the stirring speed is 3000 r.min-1Reacting for 40 min;
c. purifying and drying to obtain the modified fiber composite.
Preferably, the preparation method of the microbial complex comprises the following steps:
a. selecting 1kg of hydroxyethyl methyl cellulose, 1kg of polyacrylamide, 0.1kg of phosphite antioxidant, 2kg of anaerobic bacteria, 3kg of culture medium and 7kg of deionized water, and emulsifying in a high-shear emulsifying machine to prepare an emulsion;
b. selecting 8kg of hydroxyethyl-beta-cyclodextrin and 25kg of deionized water, putting the mixture into a grinder for grinding, and fully grinding to obtain paste;
c. and (c) adding the emulsion prepared in the step (a) into the paste prepared in the step (b), stirring while adding until the mixture is uniformly mixed, and freeze-drying to obtain the microbial compound.
Preferably, the preparation method of the modified piperylene petroleum resin comprises the following steps:
putting 98kg of piperylene petroleum resin into a melting kettle, heating and stirring until the piperylene petroleum resin is in a melting state, then adding 0.5kg of phosphite antioxidant and 1.5kg of polyisobutylene succinic anhydride, stirring while adding until the mixture is uniformly mixed, and cooling and granulating through a granulator to obtain the modified piperylene petroleum resin.
Preferably, the aggregate is perlite.
On the other hand, the application also provides a preparation method of the high-strength self-healing concrete, which comprises the following steps:
a. selecting Portland cement, a dispersing agent, aggregate, modified pentadiene petroleum resin and 0.5 time of water according to the weight part, uniformly mixing, heating to 300 ℃, and introducing a carbon dioxide foaming agent according to the weight part under the pressure of 100Mpa to prepare slurry A;
b. uniformly mixing a microbial compound, a modified fiber compound, a phenolic antioxidant, octadecanoic acid and 0.5 time of water in parts by weight at 180 ℃ under the pressure of 50MPa to prepare slurry B;
c. and cooling the slurry A and the slurry B to room temperature, uniformly mixing, stirring, and curing to obtain the concrete.
One of the above technical solutions has the following beneficial effects:
the self-healing concrete provided by the invention has the advantages that the strength and anti-cracking activity of the self-healing concrete are increased to a certain extent through a specific proportioning, the self-healing capability of the self-healing concrete is improved, the repairing time of the self-healing concrete is prolonged, and the self-healing concrete has excellent durability and compactness.
[ detailed description ] embodiments
In order to better understand the technical scheme of the invention, the following detailed description of the embodiment of the invention.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Example 1
The embodiment provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 100kg of Portland cement, 30kg of water, 10kg of carbon dioxide foaming agent, 20kg of dispersing agent, 55kg of aggregate, 20kg of microbial compound, 20kg of modified fiber compound, 1kg of phenolic antioxidant, 1kg of octadecanoic acid and 4kg of modified pentadiene petroleum resin.
It should be noted that, in the following description,
dispersant
The dispersing agent consists of guar gum hydroxypropyl trimethyl ammonium chloride, colloidal silicon dioxide, diatomite, silicon carbide powder, fly ash and phenolic resin in a weight ratio of 2:2:8:5:3: 10; the preparation method of the dispersant comprises the following steps:
a. uniformly dispersing 2 parts of guar gum hydroxypropyl trimethyl ammonium chloride in water by weight, and uniformly stirring to obtain a solution A, wherein the water content of the solution A is 80%;
b. uniformly dispersing 2 parts of colloidal silicon dioxide in ethanol according to the parts by weight, and uniformly stirring to obtain a solution B;
c. adding the solution A into the solution B, wherein the weight ratio of the solution A to the solution B is 2:1, uniformly stirring, evaporating ethanol under reduced pressure, and spray-drying until the water content is 30% to obtain mixed slurry A;
d. dispersing 8 parts of diatomite, 5 parts of silicon carbide powder, 3 parts of fly ash and 10 parts of phenolic resin in water according to parts by weight to prepare mixed slurry B with the water content of 30%;
e. and (3) grinding the mixed slurry B in a ball mill, dropwise adding the mixed slurry A while grinding, continuously grinding for 24 hours after dropwise adding, spray-drying, and sieving to obtain the dispersing agent.
Di, modified fiber composite
The preparation method of the modified fiber composite comprises the following steps:
a. 40kg of polypropylene fiber and 20kg of cellulose fiber are put into a reaction kettle to be uniformly mixed, and 35kg of volume fraction is added75 percent isopropanol aqueous solution is added, 35kg of NaOH aqueous solution with the mass fraction of 35 percent and 15kg of polyethylene glycol 400 are added, the temperature is increased while stirring, the temperature is controlled between 75 and 80 ℃, and the stirring speed is 2000 r.min-1Reacting for 40 min;
b. keeping the temperature at 75-80 ℃, continuously adding 35kg of an isopropanol aqueous solution with the volume fraction of 95%, then adding 35kg of a NaOH aqueous solution with the mass fraction of 50% and 25kg of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, and finally adding 1kg of a KI aqueous solution with the mass fraction of 50%, wherein the stirring speed is 3000 r.min-1Reacting for 40 min;
c. purifying and drying to obtain the modified fiber composite.
Third, the microbial complex
The preparation method of the microbial compound comprises the following steps:
a. selecting 1kg of hydroxyethyl methyl cellulose, 1kg of polyacrylamide, 0.1kg of phosphite antioxidant, 2kg of anaerobic bacteria, 3kg of culture medium and 7kg of deionized water, and emulsifying in a high-shear emulsifying machine to prepare an emulsion;
b. selecting 8kg of hydroxyethyl-beta-cyclodextrin and 25kg of deionized water, putting the mixture into a grinder for grinding, and fully grinding to obtain paste;
c. and (c) adding the emulsion prepared in the step (a) into the paste prepared in the step (b), stirring while adding until the mixture is uniformly mixed, and freeze-drying to obtain the microbial compound.
Modified pentadiene petroleum resin
The preparation method of the modified pentadiene petroleum resin comprises the following steps:
putting 98kg of piperylene petroleum resin into a melting kettle, heating and stirring until the piperylene petroleum resin is in a melting state, then adding 0.5kg of phosphite antioxidant and 1.5kg of polyisobutylene succinic anhydride, stirring while adding until the mixture is uniformly mixed, and cooling and granulating through a granulator to obtain the modified piperylene petroleum resin.
The preparation method of the high-strength self-healing concrete comprises the following steps:
a. selecting Portland cement, a dispersing agent, aggregate, modified pentadiene petroleum resin and 0.5 time of water according to the weight part, uniformly mixing, heating to 300 ℃, and introducing a carbon dioxide foaming agent according to the weight part under the pressure of 100Mpa to prepare slurry A;
b. uniformly mixing a microbial compound, a modified fiber compound, a phenolic antioxidant, octadecanoic acid and 0.5 time of water in parts by weight at 180 ℃ under the pressure of 50MPa to prepare slurry B;
c. and cooling the slurry A and the slurry B to room temperature, uniformly mixing, stirring, and curing to obtain the concrete.
Example 2
The embodiment provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of modified piperylene petroleum resin.
The preparation methods of the raw materials and the concrete in example 2 are exactly the same as those in example 1.
Example 3
The embodiment provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 120kg of Portland cement, 50kg of water, 20kg of carbon dioxide foaming agent, 30kg of dispersing agent, 65kg of aggregate, 30kg of microbial compound, 30kg of modified fiber compound, 3kg of phenolic antioxidant, 3kg of octadecanoic acid and 8kg of modified pentadiene petroleum resin.
The preparation methods of the raw materials and the concrete in example 2 are exactly the same as those in example 1.
Comparative example 1
Comparative example 1 provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight:
110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of polyacrylamide and 6kg of modified pentadiene petroleum resin.
The preparation methods of the raw materials and the concrete in the comparative example 1 are completely the same as those in the example 1.
Comparative example 2
Comparative example 2 provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight:
110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of phenolic resin.
The preparation method of each raw material and concrete in comparative example 2 is exactly the same as that of example 1.
Comparative example 3
Comparative example 3 provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight:
110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of octadecanoic acid and 6kg of modified pentadiene petroleum resin.
The preparation method of each raw material and concrete in comparative example 3 is exactly the same as that of example 1.
Comparative example 4
Comparative example 3 provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight:
110kg of Portland cement, 40kg of water, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of modified pentadiene petroleum resin.
The preparation method of each raw material and concrete in comparative example 4 is exactly the same as that of example 1.
Comparative example 5
The comparative example provides 5 a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of piperylene petroleum resin.
The preparation method of each raw material and concrete in comparative example 5 except that piperylene petroleum resin was not modified was exactly the same as in example 1.
Comparative example 6
Comparative example 6 provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified polypropylene fiber, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of modified piperylene petroleum resin.
The preparation method of the modified polypropylene fiber comprises the following steps:
a. 60kg of polypropylene fiber is selected and placed in a reaction kettle to be uniformly mixed, 35kg of 75% by volume isopropanol aqueous solution is added, 35kg of 35% by mass NaOH aqueous solution and 15kg of polyethylene glycol 400 are added, the temperature is controlled to be 75-80 ℃, the stirring speed is 2000 r.min < -1 >, and the reaction lasts 40 min;
b. keeping the temperature at 75-80 ℃, continuously adding 35kg of an isopropanol aqueous solution with the volume fraction of 95%, then adding 35kg of a NaOH aqueous solution with the mass fraction of 50% and 25kg of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, finally adding 1kg of a KI aqueous solution with the mass fraction of 50%, stirring at the speed of 3000 r.min < -1 >, and reacting for 40 min;
c. purifying and drying to obtain the modified polypropylene fiber.
The preparation method of each raw material except for the modified fiber and the concrete in comparative example 6 was exactly the same as that of example 1.
Comparative example 7
Comparative example 6 provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of modified piperylene petroleum resin.
Wherein the preparation method of the microbial compound comprises the following steps:
a. selecting 1kg of carboxymethyl cellulose, 1kg of polyacrylamide, 0.1kg of phosphite antioxidant, 2kg of anaerobic bacteria, 3kg of culture medium and 7kg of deionized water, and emulsifying in a high-shear emulsifying machine to prepare an emulsion;
b. selecting 8kg of hydroxyethyl-beta-cyclodextrin and 25kg of deionized water, putting the mixture into a grinder for grinding, and fully grinding to obtain paste;
c. and (c) adding the emulsion prepared in the step (a) into the paste prepared in the step (b), stirring while adding until the mixture is uniformly mixed, and freeze-drying to obtain the microbial compound.
The preparation method of each raw material except the microbial composite and the concrete in comparative example 7 was exactly the same as that of example 1.
Comparative example 8
The embodiment provides a high-strength self-healing concrete, which comprises the following raw materials in parts by weight: 110kg of Portland cement, 40kg of water, 15kg of carbon dioxide foaming agent, 25kg of dispersing agent, 60kg of aggregate, 25kg of microbial compound, 25kg of modified fiber compound, 2kg of phenolic antioxidant, 2kg of octadecanoic acid and 6kg of modified piperylene petroleum resin.
Wherein the dispersing agent consists of bentonite, silicon carbide powder, fly ash and phenolic resin in a weight ratio of 8:5:3: 10.
The preparation method of each raw material except the dispersant and the concrete in comparative example 8 were exactly the same as in example 1.
The test data in table 1 are measured based on GBJ107-87 "standard for testing and evaluating concrete strength" and GB50081 "standard method for testing mechanical properties of general concrete", and refer to table 1 specifically.
TABLE 1 concrete Performance test results
According to the high-strength self-healing concrete provided by the invention, the flexural strength and the compressive strength are increased to a certain extent through a specific proportioning and preparation method, the self-healing capability of the concrete is improved, the repairing time of the concrete is prolonged, the high-strength self-healing concrete has higher durability and compactness, the strength recovery rate of the repaired concrete is higher, the synergistic effect among the components of the high-strength self-healing concrete can be seen through the above examples and comparative examples, and when the components are replaced, the flexural strength and the compressive strength of the concrete are obviously reduced, and the recovery rate is also obviously reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. The high-strength self-healing concrete is characterized by comprising the following raw materials in parts by weight: 100-120 parts of silicate cement, 30-50 parts of water, 10-20 parts of carbon dioxide foaming agent, 20-30 parts of dispersing agent, 55-65 parts of aggregate, 20-30 parts of microbial compound, 20-30 parts of modified fiber compound, 1-3 parts of phenolic antioxidant, 1-3 parts of octadecanoic acid and 4-8 parts of modified piperylene petroleum resin,
the dispersing agent consists of guar gum hydroxypropyl trimethyl ammonium chloride, colloidal silicon dioxide, diatomite, silicon carbide powder, fly ash and phenolic resin in a weight ratio of 2:2:8:5:3: 10; the preparation method of the dispersant comprises the following steps: a. uniformly dispersing 2 parts of guar gum hydroxypropyl trimethyl ammonium chloride in water by weight, and uniformly stirring to obtain a solution A, wherein the water content of the solution A is 80%; b. uniformly dispersing 2 parts of colloidal silicon dioxide in ethanol according to the parts by weight, and uniformly stirring to obtain a solution B; c. adding the solution A into the solution B, wherein the weight ratio of the solution A to the solution B is 2:1, uniformly stirring, evaporating ethanol under reduced pressure, and spray-drying until the water content is 30% to obtain mixed slurry A; d. dispersing 8 parts of diatomite, 5 parts of silicon carbide powder, 3 parts of fly ash and 10 parts of phenolic resin in water according to parts by weight to prepare mixed slurry B with the water content of 30%; e. grinding the mixed slurry B in a ball mill, dripping the mixed slurry A while grinding, continuing grinding for 24 hours after dripping, spray drying, and sieving to obtain a dispersing agent;
the preparation method of the modified fiber composite comprises the following steps: a. selecting 40kg of polypropylene fiber and 20kg of cellulose fiber, placing the polypropylene fiber and the cellulose fiber in a reaction kettle, uniformly mixing, adding 35kg of 75% by volume isopropanol aqueous solution, then adding 35kg of 35% by mass NaOH aqueous solution and 15kg of polyethylene glycol 400, heating while stirring, controlling the temperature at 75-80 ℃, controlling the stirring speed at 2000 r.min < -1 >, and reacting for 40 min; b. keeping the temperature at 75-80 ℃, continuously adding 35kg of an isopropanol aqueous solution with the volume fraction of 95%, then adding 35kg of a NaOH aqueous solution with the mass fraction of 50% and 25kg of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, finally adding 1kg of a KI aqueous solution with the mass fraction of 50%, stirring at the speed of 3000 r.min < -1 >, and reacting for 40 min; c. purifying and drying to obtain the modified fiber compound,
the preparation method of the microbial compound comprises the following steps: a. selecting 1kg of hydroxyethyl methyl cellulose, 1kg of polyacrylamide, 0.1kg of phosphite antioxidant, 2kg of anaerobic bacteria, 3kg of culture medium and 7kg of deionized water, and emulsifying in a high-shear emulsifying machine to prepare an emulsion; b. selecting 8kg of hydroxyethyl-beta-cyclodextrin and 25kg of deionized water, putting the mixture into a grinder for grinding, and fully grinding to obtain paste; c. and (c) adding the emulsion prepared in the step (a) into the paste prepared in the step (b), stirring while adding until the mixture is uniformly mixed, and freeze-drying to prepare the microbial compound, wherein the preparation method of the modified pentadiene petroleum resin comprises the following steps: putting 98kg of piperylene petroleum resin into a melting kettle, heating and stirring until the piperylene petroleum resin is in a melting state, then adding 0.5kg of phosphite antioxidant and 1.5kg of polyisobutylene succinic anhydride, stirring while adding until the mixture is uniformly mixed, and cooling and granulating through a granulator to obtain the modified piperylene petroleum resin.
2. The high-strength self-healing concrete according to claim 1, wherein the aggregate is perlite.
3. A method for preparing the high-strength self-healing concrete according to claim 1 or 2, wherein the method comprises the following steps: a. selecting Portland cement, a dispersing agent, aggregate, modified pentadiene petroleum resin and 0.5 time of water according to the weight part, uniformly mixing, heating to 300 ℃, and introducing a carbon dioxide foaming agent according to the weight part under the pressure of 100Mpa to prepare slurry A; b. uniformly mixing a microbial compound, a modified fiber compound, a phenolic antioxidant, octadecanoic acid and 0.5 time of water in parts by weight at 180 ℃ under the pressure of 50MPa to prepare slurry B; c. and cooling the slurry A and the slurry B to room temperature, uniformly mixing, stirring, and curing to obtain the concrete.
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| CN112142409A (en) * | 2020-09-27 | 2020-12-29 | 长安大学 | Microbial self-healing waterproof anti-permeability mortar and preparation method thereof |
| CN112832270B (en) * | 2021-02-04 | 2022-03-22 | 长沙理工大学 | Self-healing flexible concrete slope protection structure and construction method thereof |
| CN114620974B (en) * | 2022-04-11 | 2023-03-17 | 广东工业大学 | Anti-cracking heat-insulating regenerated rubber mortar and preparation method thereof |
| CN115368087B (en) * | 2022-09-26 | 2024-03-15 | 芜湖职业技术学院 | Ecological slope protection brick |
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| CN107190356A (en) * | 2017-05-17 | 2017-09-22 | 安徽新生纺织有限公司 | A kind of medical fabric antibiotic radiation proof spinning and preparation method thereof |
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