CN111732379A - High-strength corrosion-resistant concrete material and preparation method thereof - Google Patents
High-strength corrosion-resistant concrete material and preparation method thereof Download PDFInfo
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- CN111732379A CN111732379A CN202010655896.2A CN202010655896A CN111732379A CN 111732379 A CN111732379 A CN 111732379A CN 202010655896 A CN202010655896 A CN 202010655896A CN 111732379 A CN111732379 A CN 111732379A
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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
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1018—Coating or impregnating with organic materials
- C04B20/1029—Macromolecular compounds
- C04B20/1037—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1074—Silicates, e.g. glass
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
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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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Abstract
The invention discloses a high-strength corrosion-resistant concrete material and a preparation method thereof, which comprises the steps of weighing raw materials of all components, uniformly mixing, ball-milling and sieving to obtain admixture powder; melting and drawing basalt, rubber particles, epoxy resin and other substances to prepare modified fibers; the vitrified microsphere is made porous by hydrofluoric acid, graphene oxide sheets are loaded on the porous microsphere through polymerization reaction, the porous microsphere and the modified fiber are bonded through the graphene oxide sheets, and the graphene oxide sheets, the cement, the sand and the admixture are mixed and stirred to obtain the high-strength corrosion-resistant concrete mortar; the invention provides the high-strength corrosion-resistant concrete and the preparation method thereof, the proportion and the reaction time are reasonably controlled in the preparation process, the corrosion resistance, the high-temperature stability and the mechanical property of the prepared concrete sample are effectively improved, meanwhile, the water consumption is reduced by adding industrial waste materials such as waste ceramic tile powder, waste rubber particles and the like, the environment is protected, the construction cost is greatly saved, and the high-strength corrosion-resistant concrete has high practicability.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a high-strength corrosion-resistant concrete material and a preparation method thereof.
Background
The concrete is widely applied to civil engineering due to good plasticity, low price and high strength, and is a building material with the largest dosage and the widest application range in the current civil engineering. However, with the continuous development of economic society, the great and frequent construction of various large-scale buildings, underground engineering and cross-sea engineering, the requirements of people on the characteristics of concrete are higher and higher, and although the current concrete technology in China can basically meet the living needs of people, a plurality of problems still need to be solved, such as the problems that the traditional concrete is insufficient in durability, large in brittleness, and easy to break, collapse, corrode and the like after being used for a certain period or working in a high-temperature environment.
The basalt fiber is a non-artificially synthesized high-performance inorganic fiber material prepared by melting natural basalt ore at high temperature, no boron or other alkali metal oxides are discharged in the production process, no harmful substances are separated out from smoke dust, and no pollution is caused to the atmosphere; the basalt fiber is low in price, long in product service life and environment-friendly, but if the basalt fiber is directly added into concrete for use, some inevitable influences can be caused, for example, chemical components of raw materials are not stable enough, impurities are mixed in the raw materials, and the building is easy to break due to too large brittleness of the fiber.
In order to meet the requirements of people on high-performance buildings and avoid the problems of insufficient chloride ion permeability resistance, high-temperature stability, corrosion resistance, compressive strength and bending strength of the traditional concrete, research on a high-strength corrosion-resistant high-performance concrete and a preparation method thereof are needed to solve the problems.
Disclosure of Invention
The invention aims to provide a high-strength corrosion-resistant concrete material and a preparation method thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the high-strength corrosion-resistant concrete material comprises the following raw material components: by weight, 800 parts of cement, 600 parts of sand and 400 parts of water, 200 parts of modified microspheres, 200 parts of modified fibers, 30-40 parts of silane coupling agent, 80-120 parts of water reducer, 150 parts of admixture and 250 parts of lubricating oil.
Preferably, the modified microsphere comprises the following raw material components: 80-100 parts of vitrified microspheres, 20-40 parts of graphene oxide sheets, 10-15 parts of hydrofluoric acid, 20-30 parts of perchloric acid, 12-14 parts of aniline and 12-14 parts of catalyst.
Preferably, the modified fiber comprises a fiber core layer and a fiber outer layer, wherein the fiber core layer comprises the following raw material components: 60-80 parts of basalt, 25-35 parts of waste rubber particles, 10-20 parts of anti-aging agent and 10-20 parts of accelerator, wherein the fiber outer layer comprises the following raw material components in parts by weight: 70-80 parts of epoxy resin, 15-25 parts of kaolin, 15-25 parts of montmorillonite and 15-25 parts of waste talc.
Preferably, the age resister is N-isopropyl-N, -phenyl-p-phenylenediamine and the accelerator is tetramethylthiuram disulfide.
Preferably, the catalyst is ammonium sulfate, and the silane coupling agent is one of gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent, and the admixture comprises the following raw material components: the composite material comprises, by weight, 60-70 parts of slag, 30-40 parts of fly ash, 20-30 parts of steel slag, 20-30 parts of graphene oxide and 20-30 parts of waste tile powder.
Preferably, the lubricating oil is one or more of silicone oil, waste vegetable oil, mechanical oil, tallow and oleic acid.
A preparation method of a high-strength corrosion-resistant concrete material comprises the following steps: the method comprises the following steps:
1) preparing raw materials;
2) preparing modified fiber;
3) preparing modified microspheres;
4) preparing concrete mortar;
5) and (6) discharging.
The method specifically comprises the following steps:
1) preparing raw materials;
A. weighing raw materials of each component;
B. placing the admixture in a ball mill for ball milling for 1-3h, and sieving the mixture through a 150-micron sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing the basalt in glacial acetic acid, stirring and dispersing for 1-2h at the rotating speed of 500r/min for 300-;
B. preparing a fiber core layer: fully mixing the waste rubber particles, the basalt powder, the anti-aging agent and the accelerant, heating to 1400 ℃ and 1600 ℃, reacting for 0.5-1h, and carrying out melt drawing to obtain primary fiber;
C. synthesizing modified fiber: soaking the primary fiber in acetic acid for 1-2h, adding epoxy resin, kaolin, montmorillonite and waste talc, stirring at the rotating speed of 600r/min for 1-2h, heating to 160 ℃ at 140-;
3) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reaction for 0.5-1h, taking out, washing with anhydrous ethanol for 3-5 times, washing with deionized water for 3-5 times, and fully drying at 60-80 ℃ to obtain porous microspheres;
B. fully mixing the porous microspheres and the graphene oxide sheets, adding perchloric acid, stirring for 0.5-1h at the rotating speed of 300r/min under 200-30 ℃, adding aniline and a catalyst, reacting for 20-24h at 22-30 ℃, and performing centrifugal separation to obtain modified microspheres;
C. fully mixing the modified microspheres and the modified fibers, soaking the mixture in a silane coupling agent for 4-6 hours, taking out and airing the mixture to obtain a mixture A;
4) preparing concrete mortar: stirring cement, sand and admixture in a stirrer at the rotating speed of 80-100r/min for 4-6min, adding water and a water reducing agent, stirring at the rotating speed of 200-400r/min for 6-8min, adding a mixture A and lubricating oil, stirring at the rotating speed of 300-500/min for 10-15min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
5) and (6) discharging.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the modified fiber is attached to the microsphere, so that on one hand, the modified microsphere and the modified fiber have a synergistic effect, the compressive strength of the concrete is higher, and the concrete is not easy to break, on the other hand, an irregular grid structure can be formed in the concrete, the chloride ion permeation and the water permeation are reduced, and the durability of the concrete is further improved.
The main component of the vitrified microsphere is silicon dioxide, the surface of the vitrified microsphere contains high-activity Si-OH groups, perchloric acid, aniline and catalystPolymerization reaction occurs under the action of ammonium sulfate serving as a reagent, and SiO is generated by Si-OH groups2Strong molecular acting force is generated between the graphene oxide sheets and polymer molecules to form a cross-linked grid structure, the graphene oxide sheets are combined with the surface of the modified fiber through adsorption and chemical bonding through a silane coupling agent, the adhesion between the graphene sheets and the modified fiber is increased, and the modified microspheres and the modified fiber are effectively combined together through the graphene sheets.
According to the invention, substances such as epoxy resin, waste rubber particles, waste talc, kaolin and the like are added into the basalt fiber to modify the basalt fiber, so that the brittleness of the basalt fiber is reduced while the strength of the basalt fiber is maintained, the toughness of the basalt fiber is improved, and the concrete is hard and flexible in the actual use process and is not easy to break.
The waste rubber and the waste talc are recycled, so that the performance of concrete can be improved, the stability of the internal raw materials of the basalt fibers is maintained, the problem of garbage accumulation is effectively reduced, and the environment is protected.
The graphene oxide sheet on the surface of the modified microsphere has a two-dimensional sheet nano-layered structure, is large in specific surface area and super strong in flexibility, contains oxygen-containing functional groups, is beneficial to adsorption between the graphene oxide sheet with positive charges and epoxy resin with negative charges, and is not easy to fall off.
The graphene oxide sheets are additionally added into the admixture, a large number of active functional groups exist on the surfaces of the graphene oxide sheets, and can participate in the hydration process of cement, cement hydration products are regulated and controlled, a compact grid structure is formed on the outer surfaces of the graphene oxide sheets, the invasion of corrosive ions is hindered, the internal structure and an interface transition weak area are improved, so that the bending strength and the compressive strength of concrete are improved, the admixture is also mixed with slag, steel slag, fly ash, waste tile powder and lubricating oil, the cost of the industrial waste is lower, the service performance is equivalent to that of the cement, the slag, the steel slag, the fly ash and the waste tile powder are mixed in the concrete, the construction cost can be reduced, the greenhouse effect is relieved, the admixture is synergistic with the lubricating oil, the friction force among the components of the concrete is reduced, and the easy activity of the concrete is improved, reduces water consumption, improves the impermeability of concrete, and has greater practicability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present 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.
Example 1
1) Preparing raw materials;
A. weighing raw materials of each component;
B. placing the admixture in a ball mill for ball milling for 1h, and sieving the admixture through a 150 mu m sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing basalt in glacial acetic acid, stirring and dispersing at the rotating speed of 300r/min for 1h, performing suction filtration, washing with absolute ethyl alcohol for 3 times, then washing with deionized water for 3 times, and drying at the temperature of 60 ℃ to obtain basalt powder;
B. preparing a fiber core layer: fully mixing waste rubber particles, basalt powder, an anti-aging agent and an accelerant, heating to 1400 ℃, reacting for 0.5h, and carrying out melt drawing to obtain primary fibers;
C. synthesizing modified fiber: soaking the primary fiber in acetic acid for 1h, adding epoxy resin, kaolin, montmorillonite and waste talc, stirring at the rotating speed of 400r/min for 1h, heating to 140 ℃, and carrying out melt drawing to obtain modified fiber;
3) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reaction for 0.5h, taking out, washing with absolute ethyl alcohol for 3 times, washing with deionized water for 3 times, and fully drying at 60 ℃ to obtain porous microspheres;
B. fully mixing the porous microspheres and the graphene oxide sheets, adding perchloric acid, stirring for 0.5h at the rotating speed of 200r/min, adding aniline and a catalyst, reacting for 20h at the temperature of 22 ℃, and performing centrifugal separation to obtain modified microspheres;
C. fully mixing the modified microspheres and the modified fibers, soaking the mixture in a silane coupling agent for 4 hours, taking out and airing the mixture to obtain a mixture A;
4) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 80r/min for 4min, adding water and a water reducing agent, stirring at the rotating speed of 200r/min for 6min, adding the mixture A and lubricating oil, stirring at the rotating speed of 300/min for 10min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
5) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the water-based coating comprises, by weight, 500 parts of cement, 400 parts of sandstone, 200 parts of water, 100 parts of modified microspheres, 100 parts of modified fibers, 30 parts of silane coupling agent, 80 parts of water reducing agent, 150 parts of admixture and 50 parts of lubricating oil.
The modified microsphere comprises the following raw material components: the catalyst comprises, by weight, 80 parts of vitrified microspheres, 20 parts of graphene oxide sheets, 10 parts of hydrofluoric acid, 20 parts of perchloric acid, 12 parts of aniline and 12 parts of a catalyst.
The modified fiber comprises the following raw material components: the anti-aging coating comprises, by weight, 60 parts of basalt, 25 parts of waste rubber particles, 10 parts of anti-aging agent, 10 parts of accelerator, 70 parts of epoxy resin, 15 parts of kaolin, 15 parts of montmorillonite and 15 parts of waste talc.
Example 2
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 2h, and sieving the mixture through a 200 mu m sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing basalt in glacial acetic acid, stirring and dispersing at the rotating speed of 400r/min for 1.5h, performing suction filtration, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and drying at 70 ℃ to obtain basalt powder;
B. preparing a fiber core layer: fully mixing waste rubber particles, basalt powder, an anti-aging agent and an accelerant, heating to 1500 ℃, reacting for 0.7h, and carrying out melt drawing to obtain primary fibers;
C. synthesizing modified fiber: soaking the primary fiber in acetic acid for 1.5h, adding epoxy resin, kaolin, montmorillonite and waste talc, stirring at the rotating speed of 500r/min for 1.5h, heating to 150 ℃, and performing melt drawing to obtain modified fiber;
3) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reaction for 0.7h, taking out, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and fully drying at 70 ℃ to obtain porous microspheres;
B. fully mixing the porous microspheres and the graphene oxide sheets, adding perchloric acid, stirring for 0.7h at the rotating speed of 250r/min, adding aniline and a catalyst, reacting for 22h at 26 ℃, and performing centrifugal separation to obtain modified microspheres;
C. fully mixing the modified microspheres and the modified fibers, soaking the mixture in a silane coupling agent for 5 hours, taking out and airing the mixture to obtain a mixture A;
4) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 90r/min for 5min, adding water and a water reducing agent, stirring at the rotating speed of 300r/min for 7min, adding the mixture A and lubricating oil, stirring at the rotating speed of 400/min for 13min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
5) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the water-based paint comprises, by weight, 600 parts of cement, 500 parts of sandstone, 300 parts of water, 150 parts of modified microspheres, 150 parts of modified fibers, 100 parts of a water reducing agent, 200 parts of a blending material, 65 parts of lubricating oil and 35 parts of a silane coupling agent.
The modified microsphere comprises the following raw material components: the catalyst comprises, by weight, 90 parts of vitrified microspheres, 30 parts of graphene oxide sheets, 12 parts of hydrofluoric acid, 25 parts of perchloric acid, 13 parts of aniline and 13 parts of a catalyst.
The modified fiber comprises the following raw material components: the anti-aging coating comprises, by weight, 70 parts of basalt, 30 parts of waste rubber particles, 15 parts of an anti-aging agent, 15 parts of an accelerator, 75 parts of epoxy resin, 20 parts of kaolin, 20 parts of montmorillonite and 20 parts of waste talc.
Example 3
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 3h, and screening the mixture through a 250-micron sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing basalt in glacial acetic acid, stirring and dispersing at the rotating speed of 500r/min for 2h, performing suction filtration, washing with absolute ethyl alcohol for 5 times, washing with deionized water for 5 times, and drying at 80 ℃ to obtain basalt powder;
B. preparing a fiber core layer: fully mixing waste rubber particles, basalt powder, an anti-aging agent and an accelerant, heating to 1600 ℃, reacting for 1h, and carrying out melt drawing to obtain primary fibers;
C. synthesizing modified fiber: soaking the primary fiber in acetic acid for 2h, adding epoxy resin, kaolin, montmorillonite and waste talc, stirring at the rotating speed of 600r/min for 2h, heating to 160 ℃, and carrying out melt drawing to obtain modified fiber;
3) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reacting for 1h, taking out, washing with absolute ethyl alcohol for 5 times, washing with deionized water for 5 times, and fully drying at 80 ℃ to obtain porous microspheres;
B. fully mixing porous microspheres and graphene oxide sheets, adding perchloric acid, stirring for 1h at the rotating speed of 300r/min, adding aniline and a catalyst, reacting for 24h at the temperature of 30 ℃, and performing centrifugal separation to obtain modified microspheres;
C. fully mixing the modified microspheres and the modified fibers, soaking the mixture in a silane coupling agent for 6 hours, taking out and airing the mixture to obtain a mixture A;
4) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 100r/min for 6min, adding water and a water reducing agent, stirring at the rotating speed of 400r/min for 8min, adding the mixture A and lubricating oil, stirring at the rotating speed of 500/min for 15min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
5) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the mortar comprises, by weight, 800 parts of cement, 600 parts of sandstone, 400 parts of water, 200 parts of modified microspheres, 200 parts of modified fibers, 40 parts of silane coupling agents, 120 parts of water reducing agents, 250 parts of admixtures and 80 parts of lubricating oil.
The modified microsphere comprises the following raw material components: the catalyst comprises, by weight, 100 parts of vitrified microspheres, 40 parts of graphene oxide sheets, 15 parts of hydrofluoric acid, 30 parts of perchloric acid, 14 parts of aniline and 14 parts of a catalyst.
The modified fiber comprises the following raw material components: the anti-aging coating comprises, by weight, 80 parts of basalt, 35 parts of waste rubber particles, 20 parts of an anti-aging agent, 20 parts of an accelerator, 80 parts of epoxy resin, 25 parts of kaolin, 25 parts of montmorillonite and 25 parts of waste talc.
Example 4
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 2h, and sieving the mixture through a 200 mu m sieve to obtain admixture powder;
2) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reaction for 0.7h, taking out, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and fully drying at 70 ℃ to obtain porous microspheres;
B. fully mixing the porous microspheres and the graphene oxide sheets, adding perchloric acid, stirring for 0.7h at the rotating speed of 250r/min, adding aniline and a catalyst, reacting for 22h at 26 ℃, and performing centrifugal separation to obtain modified microspheres;
C. soaking the modified microspheres in a silane coupling agent for 5 hours, taking out and airing to obtain a mixture A;
3) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 90r/min for 5min, adding water and a water reducing agent, stirring at the rotating speed of 300r/min for 7min, adding the mixture A and lubricating oil, stirring at the rotating speed of 400/min for 13min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
4) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the water-based paint comprises, by weight, 600 parts of cement, 500 parts of sandstone, 300 parts of water, 150 parts of modified microspheres, 150 parts of modified fibers, 35 parts of silane coupling agents, 100 parts of water reducing agents, 200 parts of admixtures and 65 parts of lubricating oil.
The modified microsphere comprises the following raw material components: the catalyst comprises, by weight, 90 parts of vitrified microspheres, 30 parts of graphene oxide sheets, 12 parts of hydrofluoric acid, 25 parts of perchloric acid, 13 parts of aniline and 13 parts of a catalyst.
Example 5
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 2h, and sieving the mixture through a 200 mu m sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing basalt in glacial acetic acid, stirring and dispersing at the rotating speed of 400r/min for 1.5h, performing suction filtration, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and drying at 70 ℃ to obtain basalt powder;
B. preparing a fiber core layer: fully mixing waste rubber particles, basalt powder, an anti-aging agent and an accelerant, heating to 1500 ℃, reacting for 0.7h, and carrying out melt drawing to obtain primary fibers;
C. synthesizing modified fiber: soaking the primary fiber in acetic acid for 1.5h, adding epoxy resin, kaolin, montmorillonite and waste talc, stirring at the rotating speed of 500r/min for 1.5h, heating to 150 ℃, and performing melt drawing to obtain modified fiber;
3) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 90r/min for 5min, adding water and a water reducing agent, stirring at the rotating speed of 300r/min for 7min, adding modified fiber and lubricating oil, stirring at the rotating speed of 400/min for 13min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
4) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the cement mortar comprises, by weight, 600 parts of cement, 500 parts of sandstone, 300 parts of water, 150 parts of modified fiber, 100 parts of water reducing agent, 200 parts of admixture and 65 parts of lubricating oil.
The modified fiber comprises the following raw material components: the anti-aging coating comprises, by weight, 70 parts of basalt, 30 parts of waste rubber particles, 15 parts of an anti-aging agent, 15 parts of an accelerator, 75 parts of epoxy resin, 20 parts of kaolin, 20 parts of montmorillonite and 20 parts of waste talc.
Example 6
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 2h, and sieving the mixture through a 200 mu m sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing basalt in glacial acetic acid, stirring and dispersing at the rotating speed of 400r/min for 1.5h, performing suction filtration, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and drying at 70 ℃ to obtain basalt powder;
B. preparing a fiber core layer: fully mixing waste rubber particles, basalt powder, an anti-aging agent and an accelerant, heating to 1500 ℃, reacting for 0.7h, and carrying out melt drawing to obtain primary fibers;
3) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reaction for 0.7h, taking out, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and fully drying at 70 ℃ to obtain porous microspheres;
B. fully mixing the porous microspheres and the graphene oxide sheets, adding perchloric acid, stirring for 0.7h at the rotating speed of 250r/min, adding aniline and a catalyst, reacting for 22h at 26 ℃, and performing centrifugal separation to obtain modified microspheres;
C. fully mixing the solid product and the primary fiber, soaking in a silane coupling agent for 5 hours, taking out and airing to obtain a mixture A;
4) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 90r/min for 5min, adding water and a water reducing agent, stirring at the rotating speed of 300r/min for 7min, adding the mixture A and lubricating oil, stirring at the rotating speed of 400/min for 13min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
5) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the water-based paint comprises, by weight, 600 parts of cement, 500 parts of sandstone, 300 parts of water, 150 parts of modified microspheres, 150 parts of modified fibers, 100 parts of a water reducing agent, 200 parts of a blending material, 65 parts of lubricating oil and 35 parts of a silane coupling agent.
The modified microsphere comprises the following raw material components: the catalyst comprises, by weight, 90 parts of vitrified microspheres, 30 parts of graphene oxide sheets, 12 parts of hydrofluoric acid, 25 parts of perchloric acid, 13 parts of aniline and 13 parts of a catalyst.
The primary fiber comprises the following raw material components: 70 parts of basalt, 30 parts of waste rubber particles, 15 parts of age resister and 15 parts of accelerator.
Example 7
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 2h, and sieving the mixture through a 200 mu m sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing basalt in glacial acetic acid, stirring and dispersing at the rotating speed of 400r/min for 1.5h, performing suction filtration, washing with absolute ethyl alcohol for 4 times, washing with deionized water for 4 times, and drying at 70 ℃ to obtain basalt powder;
B. preparing a fiber core layer: fully mixing waste rubber particles, basalt powder, an anti-aging agent and an accelerant, heating to 1500 ℃, reacting for 0.7h, and carrying out melt drawing to obtain primary fibers;
3) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 90r/min for 5min, adding water and a water reducing agent, stirring at the rotating speed of 300r/min for 7min, adding primary fiber and lubricating oil, stirring at the rotating speed of 400/min for 13min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
4) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the water-reducing agent comprises, by weight, 600 parts of cement, 500 parts of sandstone, 300 parts of water, 150 parts of modified microspheres, 150 parts of modified fibers, 100 parts of water reducing agent, 200 parts of admixture and 65 parts of lubricating oil.
The primary fiber comprises the following raw material components: 70 parts of basalt, 30 parts of waste rubber particles, 15 parts of age resister and 15 parts of accelerator.
Example 8
1) Preparing raw materials;
weighing raw materials of each component;
placing the admixture in a ball mill for ball milling for 2h, and sieving the mixture through a 200 mu m sieve to obtain admixture powder;
2) preparing concrete mortar: stirring cement, gravel and admixture in a stirrer at the rotating speed of 90r/min for 5min, adding water and a water reducing agent, stirring at the rotating speed of 300r/min for 7min, adding lubricating oil, and stirring at the rotating speed of 400/min for 13min until the mortar is not agglomerated to obtain concrete mortar;
5) and (6) discharging.
The high-strength corrosion-resistant concrete material comprises the following raw material components: the cement mortar comprises, by weight, 600 parts of cement, 500 parts of sandstone, 300 parts of water, 100 parts of a water reducing agent, 200 parts of a blending material and 65 parts of lubricating oil.
Example 2 is a comparative experiment with examples 4 to 8, in which only modified microspheres were added to the concrete sample of example 4, the modified microspheres were stirred with the component materials such as cement to prepare a concrete sample, example 5 was added with modified fibers, the modified fibers were stirred with the component materials such as cement to prepare a concrete sample, example 6 was performed with the modified fibers only forming the fiber inner layer and adding the modified microspheres, the fiber inner layer, the modified fibers were stirred with the component materials such as cement to prepare a concrete sample, example 7 was performed with the modified fibers only forming the fiber inner layer, the fiber inner layer was stirred with the component materials such as cement to prepare a concrete sample, example 8 was a blank test, no modified fibers and modified microspheres were added, the component materials such as cement were stirred directly, concrete samples were prepared and the remaining control parameters were the same, and the concrete samples obtained in examples 1-8 were tested and plotted.
Experiment:
the concrete samples prepared in examples 1-8 were each placed in a cube mold, the cube mold was placed in standard laboratory air, a plastic film was applied over the cube mold to prevent water evaporation, cured for 24 hours, removed, and immersed in water for curing.
And (3) testing high-temperature resistance: after the concrete samples prepared in the examples 1 to 8 are subjected to standard maintenance for 28 days, the compressive strength, the bending strength and the chloride ion diffusion coefficient of the concrete samples are respectively tested, the samples are placed in a high-temperature furnace for 4 hours, the temperature is continuously increased to 900 ℃, the temperature is kept constant for 28 days, and the change of the concrete samples is observed.
And (3) corrosion resistance testing: the concrete samples prepared in examples 1 to 8 were respectively added to a 25% sulfuric acid solution, a 45% sulfuric acid solution, a 65% sulfuric acid solution, a 55% hydrochloric acid solution, and a 25% sodium hydroxide solution for soaking, the samples were taken out at regular intervals, dried at 85 ℃, the mass of the concrete samples was recorded, and then the concrete samples were soaked in the original solution, and the detection data were analyzed.
The detection results are as follows:
according to the data in the table, it can be seen that the concrete sample of example 4 only contains the modified microspheres, the modified microspheres are mixed with the raw materials of cement and other components, the high temperature resistance of the prepared concrete sample is general, the surface of the sample taken out from the high temperature furnace has obvious cracks, the other properties are greatly improved compared with the traditional concrete sample, the modified fibers are added in example 5, the modified fibers are mixed with the raw materials of cement and other components, the prepared concrete sample is taken out from the high temperature furnace, the surface of the concrete has no obvious cracks, the high temperature resistance is excellent, the corrosion resistance and the chloride ion diffusion coefficient are greatly different from those of example 3, but the properties are greatly improved compared with the traditional concrete sample, the modified fibers of example 6 only contain the fiber inner layer and are added with the modified microspheres, the fiber inner layer and the modified fibers are mixed with the raw materials of cement and other components, the prepared concrete sample is taken out of the high-temperature furnace, the surface of the concrete sample has slight cracks, the high-temperature resistance is general, the compression resistance is superior to that of the concrete sample in examples 5, 7 and 8, other performances are general, but compared with the traditional concrete sample, the performances are improved, the modified fiber in example 7 only has a fiber inner layer, the fiber inner layer is stirred with the raw materials of the components of cement and the like, the prepared concrete sample is taken out of the high-temperature furnace, the surface of the concrete sample has slight cracks, the high-temperature resistance is general, the bending resistance is insufficient, other performances are greatly improved compared with that of the traditional concrete sample, the concrete prepared in example 8 is a blank test, the raw materials of the cement and the like are directly stirred without adding the modified fiber and the modified microsphere, the prepared concrete sample is taken out of the high-temperature furnace, the concrete sample has melting phenomenon, and all the properties are not ideal. The experimental data of examples 1 to 8 are compared, and the data in the table show that the concrete sample prepared in example 2 has the best experimental effect, and the concrete sample prepared has the most ideal results of chloride ion permeability resistance, highest compressive strength, highest bending strength, corrosion resistance and high temperature resistance.
From the above data and experiments, we can conclude that: 1. the traditional concrete sample has poor high-temperature stability, insufficient mechanical property, large brittleness, easy fracture and non-corrosion resistance, the modified fiber and the modified microsphere are added on the basis of the traditional concrete formula, the mechanical property and the corrosion resistance of the concrete are effectively improved, the graphene oxide sheet is loaded on the vitrified microsphere to modify the vitrified microsphere, a layer of modified fiber is attached to the outside of the modified vitrified microsphere, and the modified vitrified microsphere and the modified fiber have synergistic effect, so that the compressive strength and the corrosion resistance of the concrete are further improved.
2. According to the invention, through polymerization reaction under the action of perchloric acid, aniline and catalyst ammonium sulfate, strong molecular acting force is generated between SiO2 and polymer molecules by Si-OH groups to form a cross-linked grid structure, the modified microspheres and graphene oxide sheets are effectively combined together, the graphene oxide sheets have aminopropyl due to a silane coupling agent, the aminopropyl has positive charges, epoxy resin in modified fibers has negative charges, the graphene oxide sheets and the epoxy resin are effectively combined together through electrostatic adsorption, and waste rubber particles added in the modified fibers and the epoxy resin have synergistic effect, so that the modified fibers have certain toughness, and the bending strength and the high temperature resistance of concrete are greatly improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. A high-strength corrosion-resistant concrete material is characterized in that: the raw material components are as follows: by weight, 800 parts of cement, 600 parts of sand and 400 parts of water, 200 parts of modified microspheres, 200 parts of modified fibers, 30-40 parts of silane coupling agent, 80-120 parts of water reducer, 150 parts of admixture and 250 parts of lubricating oil.
2. A high strength corrosion resistant concrete material according to claim 1, wherein: the modified microsphere comprises the following raw material components: 80-100 parts of vitrified microspheres, 20-40 parts of graphene oxide sheets, 10-15 parts of hydrofluoric acid, 20-30 parts of perchloric acid, 12-14 parts of aniline and 12-14 parts of catalyst.
3. A high strength corrosion resistant concrete material according to claim 1, wherein: the modified fiber comprises a fiber core layer and a fiber outer layer, wherein the fiber core layer comprises the following raw material components: 60-80 parts of basalt, 25-35 parts of waste rubber particles, 10-20 parts of anti-aging agent and 10-20 parts of accelerator, wherein the fiber outer layer comprises the following raw material components in parts by weight: 70-80 parts of epoxy resin, 15-25 parts of kaolin, 15-25 parts of montmorillonite and 15-25 parts of waste talc.
4. A high strength corrosion resistant concrete material according to claim 3, wherein: the anti-aging agent is N-isopropyl-N' -phenyl-p-phenylenediamine, and the accelerator is tetramethyl thiuram disulfide.
5. A high strength corrosion resistant concrete material according to claim 1, wherein: the silane coupling agent is one of gamma-aminopropyltriethoxysilane and gamma-glycidoxypropyltrimethoxysilane.
6. A high strength corrosion resistant concrete material according to claim 1, wherein: the water reducing agent is a polycarboxylic acid water reducing agent, and the admixture comprises the following raw material components: the composite material comprises, by weight, 60-70 parts of slag, 30-40 parts of fly ash, 20-30 parts of steel slag, 20-30 parts of graphene oxide and 20-30 parts of waste tile powder.
7. A high strength corrosion resistant concrete material according to claim 1, wherein: the lubricating oil is one or more of silicone oil, waste vegetable oil, mechanical oil, tallow and oleic acid.
8. A preparation method of a high-strength corrosion-resistant concrete material is characterized by comprising the following steps: the method comprises the following steps:
1) preparing raw materials;
2) preparing modified fiber;
3) preparing modified microspheres;
4) preparing concrete mortar;
5) and (6) discharging.
9. The method for preparing a high-strength corrosion-resistant concrete material according to claim 8, wherein the method comprises the following steps: the method specifically comprises the following steps:
1) preparing raw materials;
A. weighing raw materials of each component;
B. placing the admixture in a ball mill for ball milling for 1-3h, and sieving the mixture through a 150-micron sieve to obtain admixture powder;
2) preparing modified fiber;
A. preparing basalt powder: placing the basalt in glacial acetic acid, stirring and dispersing for 1-2h at the rotating speed of 500r/min for 300-;
B. preparing a fiber core layer: fully mixing the waste rubber particles, the basalt powder, the anti-aging agent and the accelerant, heating to 1400 ℃ and 1600 ℃, reacting for 0.5-1h, and carrying out melt drawing to obtain primary fiber;
C. synthesizing modified fiber: soaking the primary fiber in acetic acid for 1-2h, adding epoxy resin, kaolin, montmorillonite and waste talc, stirring at the rotating speed of 600r/min for 1-2h, heating to 160 ℃ at 140-;
3) preparing modified microspheres;
A. placing the vitrified microspheres in hydrofluoric acid for reaction for 0.5-1h, taking out, washing with anhydrous ethanol for 3-5 times, washing with deionized water for 3-5 times, and fully drying at 60-80 ℃ to obtain porous microspheres;
B. fully mixing the porous microspheres and the graphene oxide sheets, adding perchloric acid, stirring for 0.5-1h at the rotating speed of 300r/min under 200-30 ℃, adding aniline and a catalyst, reacting for 20-24h at 22-30 ℃, and performing centrifugal separation to obtain modified microspheres;
C. fully mixing the modified microspheres and the modified fibers, soaking the mixture in a silane coupling agent for 4-6 hours, taking out and airing the mixture to obtain a mixture A;
4) preparing concrete mortar: stirring cement, sand and admixture in a stirrer at the rotating speed of 80-100r/min for 4-6min, adding water and a water reducing agent, stirring at the rotating speed of 200-400r/min for 6-8min, adding a mixture A and lubricating oil, stirring at the rotating speed of 300-500/min for 10-15min until the mortar is not agglomerated into blocks, and obtaining concrete mortar;
5) and (6) discharging.
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