CN112266208A - Fiber-reinforced concrete and preparation method thereof - Google Patents
Fiber-reinforced concrete and preparation method thereof Download PDFInfo
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- CN112266208A CN112266208A CN202011097451.3A CN202011097451A CN112266208A CN 112266208 A CN112266208 A CN 112266208A CN 202011097451 A CN202011097451 A CN 202011097451A CN 112266208 A CN112266208 A CN 112266208A
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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
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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 fiber reinforced concrete and a preparation method thereof.A reinforced fiber material is prepared by using reinforced fiber production equipment to prepare carbon fibers, brucite fibers, glass fibers, epoxy resin, acrylate emulsion, a dispersing agent, diatomite and rubber powder, and then cement, fly ash, mineral powder, water, broken stone, river sand, a water reducing agent and the reinforced fiber material are uniformly mixed to prepare the fiber reinforced concrete; the fiber reinforced concrete has excellent compressive strength and flexural strength; this reinforcing fiber production facility passes through the powder process mechanism and dries after with raw materials stirring, then smashes it into powder, then sieves the powder of smashing according to the particle diameter through screening mechanism, selects the powder that wherein the particle diameter is less and is used for preparing the concrete for reinforcing fiber material is evenly dispersed in the concrete, makes reinforcing fiber material's effect give full play to, further makes the concrete mechanical properties who prepares good, and the quality is high.
Description
Technical Field
The invention relates to the field of concrete, in particular to fiber reinforced concrete and a preparation method thereof.
Background
Concrete is one of the most important civil engineering materials of the present generation. The artificial stone is prepared by a cementing material, granular aggregate, water, an additive and an admixture which are added if necessary according to a certain proportion, and is formed by uniformly stirring, closely forming, curing and hardening.
The patent with the application number of CN201710098518.7 discloses a concrete and a preparation method thereof, wherein the concrete comprises the following components in parts by weight: cement 103 + 133 parts; 20-36 parts of river sand; 21-31 parts of gravel; 45-60 parts of water; 12-23 parts of a fiber mixture; 21-33 parts of lignin; 20-36 parts of an adhesive; 12-18 parts of a concrete expanding agent; 35-51 parts of a filler; the fiber mixture comprises two or more of glass fiber, polypropylene fiber and steel fiber; the adhesive comprises at least two of epoxy resin, unsaturated polyester resin and SBS modified asphalt; the filler comprises silicon powder, quartz sand and limestone; the concrete expanding agent comprises at least two of SY-T composite fiber anti-cracking agent, SY-K expansion fiber anti-cracking waterproof agent and CAL fiber composite quaternary expanding agent, and the concrete has the advantages of good cold resistance, stability and durability, and difficult occurrence of cracks, but still has the following defects: the toughness, bending strength and compressive strength of the concrete are not good enough.
Disclosure of Invention
In order to overcome the technical problems, the invention aims to provide fiber reinforced concrete and a preparation method thereof: preparing a reinforced fiber material by reinforced fiber production equipment, adding acrylate emulsion into a curing box from a feeding hopper, then adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor, driving a spiral stirring blade to rotate by the operation of the stirring motor to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, heating and drying the first mixture by starting heating wires in a first scraping plate and a second scraping plate to release heat, starting a second cylinder, drawing the second scraping plate to move by the contraction of movable rods of the second cylinder, scraping the first mixture dried on the second scraping plate by the curing box, starting the first cylinder, drawing the first scraping plate to ascend by the contraction of movable rods of four first cylinders, scraping the first mixture dried on the first scraping plate by a scraping frame, and falling all the dried first mixtures onto two crushing rollers, starting a crushing motor, driving two crushing rollers to rotate by the operation of the crushing motor through two linkage gears, crushing a dried first mixture into powder, enabling the powdery first mixture to fall onto a screening plate through a receiving hopper and a receiving port, starting a vibration motor, driving a screening groove and the screening plate to vibrate by the operation of the vibration motor, enabling part of the powdery first mixture to pass through a screen, discharging the part of the powdery first mixture from a fine material outlet through a guide plate to obtain mixed powder, enabling the rest of the powdery first mixture to pass through a discharging port, discharging the rest of the powdery first mixture from a coarse material outlet, adding epoxy resin into a curing box for heating and melting, adding the mixed powder and a dispersing agent into the molten epoxy resin, sequentially adding carbon fibers, brucite fibers and glass fibers after uniformly mixing to obtain a second mixture, heating and drying the second mixture, then crushing the mixture into powder through the crushing rollers to obtain a powdery second mixture, and part of the powdery second mixture passes through the screen and is discharged from the fine material outlet to obtain a reinforced fiber material, river sand, gravel, cement, mineral powder, fly ash and water are uniformly stirred, a water reducing agent is added and uniformly stirred, and finally the reinforced fiber material is added and uniformly stirred to obtain the fiber reinforced concrete, so that the problem that the toughness, the bending strength and the compressive strength of the existing concrete are not good enough is solved.
The purpose of the invention can be realized by the following technical scheme:
the fiber reinforced concrete comprises the following components in parts by weight:
50-60 parts of cement, 30-40 parts of fly ash, 18-22 parts of mineral powder, 30-36 parts of water, 160 parts of gravel 140-containing materials, 140 parts of river sand, 1-3 parts of water reducing agent, 5-10 parts of carbon fiber, 1-5 parts of brucite fiber, 1.5-3 parts of glass fiber, 10-25 parts of epoxy resin, 5-10 parts of acrylate emulsion, 0.7-1.4 parts of dispersing agent, 1.8-2.6 parts of diatomite and 0.3-0.5 part of rubber powder;
the fiber reinforced concrete is prepared by the following steps:
the method comprises the following steps: adding the acrylate emulsion into a curing box from a feeding hopper of reinforced fiber production equipment, then adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor, driving a spiral stirring blade to rotate by the operation of the stirring motor to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, and heating and drying the first mixture by starting heating wires in a first scraping plate and a second scraping plate to release heat;
step two: starting a second cylinder, wherein movable rods of the second cylinder contract to pull a second scraping plate to move, a first mixture dried on the second scraping plate is scraped off through a curing box, a first cylinder is started, movable rods of four first cylinders contract to pull a first scraping plate to ascend, the first mixture dried on the first scraping plate is scraped off through a scraping frame, and all the dried first mixtures fall onto two crushing rollers;
step three: starting a crushing motor, driving two crushing rollers to rotate by the operation of the crushing motor through two linkage gears, and crushing the dried first mixture into powder;
step four: the powder first mixture falls onto the screening plate through the receiving hopper and the receiving port, the vibration motor is started, the vibration motor operates to drive the screening groove and the screening plate to vibrate, part of the powder first mixture passes through the screen and is discharged from the fine material outlet through the guide plate to obtain mixed powder, and the rest of the powder first mixture passes through the discharging port and is discharged from the coarse material outlet;
step five: adding epoxy resin into a curing box for heating and melting, adding mixed powder and a dispersing agent into the melted epoxy resin, stirring for 20-30min under the condition of 800-1000r/min, sequentially adding carbon fiber, brucite fiber and glass fiber, stirring for 30-60min at the rotating speed of 1200-1600r/min to obtain a second mixture, heating and drying the second mixture, crushing the second mixture into powder through a crushing roller to obtain a powdery second mixture, and discharging part of the powdery second mixture from a fine material outlet after passing through a screen mesh to obtain a reinforced fiber material;
step six: and uniformly stirring river sand, broken stone, cement, mineral powder, fly ash and water, adding a water reducing agent, uniformly stirring, finally adding a reinforcing fiber material, and uniformly stirring to obtain the fiber-reinforced concrete.
As a further scheme of the invention: the dispersing agent is one or a mixture of more of methylcellulose, sodium dodecyl sulfate and sodium carboxymethyl cellulose in any proportion; the water reducing agent is one of an aliphatic water reducing agent, a naphthalene water reducing agent and a polycarboxylic acid water reducing agent.
As a further scheme of the invention: a preparation method of fiber reinforced concrete comprises the following steps:
the method comprises the following steps: adding the acrylate emulsion into a curing box from a feeding hopper of reinforced fiber production equipment, then adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor, driving a spiral stirring blade to rotate by the operation of the stirring motor to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, and heating and drying the first mixture by starting heating wires in a first scraping plate and a second scraping plate to release heat;
step two: starting a second cylinder, wherein movable rods of the second cylinder contract to pull a second scraping plate to move, a first mixture dried on the second scraping plate is scraped off through a curing box, a first cylinder is started, movable rods of four first cylinders contract to pull a first scraping plate to ascend, the first mixture dried on the first scraping plate is scraped off through a scraping frame, and all the dried first mixtures fall onto two crushing rollers;
step three: starting a crushing motor, driving two crushing rollers to rotate by the operation of the crushing motor through two linkage gears, and crushing the dried first mixture into powder;
step four: the powder first mixture falls onto the screening plate through the receiving hopper and the receiving port, the vibration motor is started, the vibration motor operates to drive the screening groove and the screening plate to vibrate, part of the powder first mixture passes through the screen and is discharged from the fine material outlet through the guide plate to obtain mixed powder, and the rest of the powder first mixture passes through the discharging port and is discharged from the coarse material outlet;
step five: adding epoxy resin into a curing box for heating and melting, adding mixed powder and a dispersing agent into the melted epoxy resin, stirring for 20-30min under the condition of 800-1000r/min, sequentially adding carbon fiber, brucite fiber and glass fiber, stirring for 30-60min at the rotating speed of 1200-1600r/min to obtain a second mixture, heating and drying the second mixture, crushing the second mixture into powder through a crushing roller to obtain a powdery second mixture, and discharging part of the powdery second mixture from a fine material outlet after passing through a screen mesh to obtain a reinforced fiber material;
step six: and uniformly stirring river sand, broken stone, cement, mineral powder, fly ash and water, adding a water reducing agent, uniformly stirring, finally adding a reinforcing fiber material, and uniformly stirring to obtain the fiber-reinforced concrete.
As a further scheme of the invention: reinforcing fiber production facility includes powder process mechanism, screening mechanism, conveyer, one side below of powder process mechanism is connected to screening mechanism, be provided with the conveyer under screening mechanism one end, install conveyor motor on the conveyer.
As a further scheme of the invention: the powder making mechanism comprises a mounting frame, a curing box, a crushing box, a material receiving hopper, a stirring motor, a feeding hopper, a first air cylinder, a support frame, a crushing motor, a support plate, a second air cylinder, a spiral stirring blade, a material scraping frame, a first material scraping plate, a second material scraping plate, a crushing roller, a linkage gear and a plate penetrating port, wherein the curing box is mounted at the top of an inner cavity of the mounting frame, the crushing box is mounted at the bottom of the curing box, the material receiving hopper is mounted at the bottom of the crushing box, the stirring motor is mounted at the axis of the top of the crushing box, the feeding hopper is mounted at one side of the top of the crushing box, the first air cylinder is mounted at the edges of four sides of the top of the crushing box, the support frame is mounted at one side of the mounting frame, the crushing motor is mounted in the inner, and a second cylinder is mounted at the top of the supporting plate.
As a further scheme of the invention: the improved curing box is characterized in that a spiral stirring blade is arranged in the middle of an inner cavity of the curing box, the top end of the spiral stirring blade is connected to an output shaft of a stirring motor, a scraping frame is installed on the inner wall of the curing box, plate penetrating openings are formed in four sides of the scraping frame, first scraping plates are arranged on the inner walls of four sides of the curing box, four first scraping plates penetrate through the four plate penetrating openings respectively, the tops of the first scraping plates penetrate through the top of the curing box and are connected to movable rods of four first cylinders respectively, a second scraping plate is arranged at the bottom of the inner cavity of the curing box and is arranged below the four first scraping plates, one side of the second scraping plate penetrates through one side of the curing box and is connected to the movable rods of the second cylinders, and heating wires are installed inside the first scraping plate and the second scraping plate.
As a further scheme of the invention: two crushing rollers are rotatably installed in the inner cavity of the crushing box through bearings, the two crushing rollers are meshed with each other, one end of each crushing roller is sleeved with a linkage gear, the linkage gears are meshed with each other and connected with each other, and one crushing roller is connected to an output shaft of a crushing motor.
As a further scheme of the invention: screening mechanism includes the screening case, connects material mouth, supporting leg, supporting spring, screening groove, connecting plate, vibrating motor, thin material export, thick material export, screening board, guide plate, screen cloth, bin outlet, the top one end of screening case is installed and is connect the material mouth, four supporting spring are installed to screening bottom of the case portion, four supporting legs are installed through four supporting spring to the screening case, install the screening groove in the inner chamber of screening case, two triangle-shaped's connecting plate, two are installed to the bottom in screening groove vibrating motor is installed to one side of connecting plate.
As a further scheme of the invention: the both ends in screening groove are provided with thin material export, coarse fodder export respectively, the screening board is installed in the slope of the inner chamber top in screening groove, the guide plate is installed to the inner chamber bottom in screening groove, the screening board includes screen cloth and bin outlet, the screen cloth is located the guide plate directly over, the bin outlet is located the coarse fodder export directly over, the screening board is close to the height that highly is greater than and keeps away from thin material export one end of fine material export one end, the fine material export is located the conveyer directly over, the guide plate is close to highly being greater than and keeps away from the height of coarse fodder export one end.
The invention has the beneficial effects that:
(1) according to the fiber-reinforced concrete and the preparation method thereof, the fiber-reinforced concrete is prepared by preparing a reinforced fiber material from carbon fibers, brucite fibers, glass fibers, epoxy resin, acrylate emulsion, a dispersing agent, diatomite and rubber powder, and then uniformly mixing cement, fly ash, mineral powder, water, broken stone, river sand, a water reducing agent and the reinforced fiber material; the excellent compressive strength of the cement material is kept by the carbon fibers, the breaking strength and the fracture toughness are further improved to a certain degree, meanwhile, the carbon fibers can also improve the durability and the impermeability of concrete, the crack resistance and the compressive strength of the concrete can be improved by the brucite fibers and the glass fibers, and the epoxy resin is blended with the carbon fibers, the brucite fibers and the glass fibers, so that the bonding force of the epoxy resin is large, and the fused epoxy resin can form a film with larger toughness after the surfaces of the carbon fibers, the brucite fibers and the glass fibers are solidified, so that the compressive strength and the breaking strength of the three fibers are increased, the toughness of the three fibers is increased, and the compressive strength and the breaking strength of the concrete are further improved;
(2) the invention relates to a fiber reinforced concrete and a preparation method thereof, which comprises the steps of preparing a reinforced fiber material by reinforced fiber production equipment, adding acrylate emulsion into a curing box from a feeding hopper, adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor, driving a spiral stirring blade to rotate by the operation of the stirring motor to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, heating and drying the first mixture by starting heating wires in a first scraping plate and a second scraping plate to release heat, starting a second cylinder, drawing the second scraping plate to move by the contraction of movable rods of the second cylinder, scraping the first mixture dried on the second scraping plate by the curing box, starting the first cylinder, drawing the first scraping plate to ascend by the contraction of the movable rods of four first cylinders, scraping the first mixture dried on the first scraping plate by a scraping frame, all the dry first mixture falls onto the two crushing rollers, the crushing motor is started, the crushing motor drives the two crushing rollers to rotate through the two linkage gears, the dry first mixture is crushed into powder, the powdery first mixture falls onto the screening plate through the receiving hopper and the receiving port, the vibration motor is started, the vibration motor drives the screening groove and the screening plate to vibrate, part of the powdery first mixture passes through the screen and is discharged from the fine material outlet through the guide plate to obtain mixed powder, the rest of the powdery first mixture passes through the discharging port and is discharged from the coarse material outlet, epoxy resin is added into the curing box to be heated and melted, the mixed powder and the dispersing agent are added into the melted epoxy resin, carbon fiber, brucite fiber and glass fiber are sequentially added after uniform mixing, a second mixture is obtained after uniform mixing, and the second mixture is heated and dried, then crushing the mixture into powder by a crushing roller to obtain a powdery second mixture, and discharging part of the powdery second mixture from a fine material outlet after passing through a screen to obtain a reinforced fiber material; this reinforcing fiber production facility passes through the powder process mechanism and dries after with raw materials stirring, then smashes it into powder, then sieves the powder of smashing according to the particle diameter through screening mechanism, select the powder that wherein the particle diameter is less, obtain the reinforcing fiber material, prepare the concrete with reinforcing fiber material application, because the particle diameter of reinforcing fiber material is little, make the reinforcing fiber material in the concrete even of dispersion, make the effect of reinforcing fiber material give full play to, further make the concrete mechanical properties who prepares good, the quality is high.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of a reinforcing fiber production apparatus according to the present invention;
FIG. 2 is a side view of the pulverizing mechanism of the present invention;
FIG. 3 is a schematic view showing the internal structure of a curing box and a pulverizing box according to the present invention;
FIG. 4 is a schematic view of the scraper frame of the present invention;
FIG. 5 is a view showing the connection of the crushing roller and the interlocking gear in the present invention;
FIG. 6 is a front view of the sifting mechanism of the present invention;
FIG. 7 is a schematic view of the internal structure of the sifting mechanism of the present invention;
FIG. 8 is a schematic view showing the inner structure of a sieving tank in the present invention;
figure 9 is a schematic view of the construction of the screen panel of the present invention.
In the figure: 100. a powder making mechanism; 200. a screening mechanism; 300. a conveyor; 101. a mounting frame; 102. a curing box; 103. a crushing box; 104. a receiving hopper; 105. a stirring motor; 106. a hopper; 107. a first cylinder; 108. a support frame; 109. a grinding motor; 110. a support plate; 111. a second cylinder; 112. a spiral stirring blade; 113. a material scraping frame; 114. a first scraper plate; 115. a second scraper plate; 116. a crushing roller; 117. a linkage gear; 118. a plate penetrating port; 201. screening the box; 202. a material receiving port; 203. supporting legs; 204. a support spring; 205. a screening tank; 206. a connecting plate; 207. a vibration motor; 208. a fine material outlet; 209. a coarse material outlet; 210. a screening plate; 211. a baffle; 212. screening a screen; 213. a discharge outlet; 301. a conveying motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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:
referring to fig. 1-9, the present embodiment is a fiber reinforced concrete, which comprises the following components in parts by weight:
the fiber reinforced concrete comprises the following components in parts by weight:
50 parts of cement, 30 parts of fly ash, 18 parts of mineral powder, 30 parts of water, 140 parts of broken stone, 120 parts of river sand, 1 part of water reducing agent, 5 parts of carbon fiber, 1 part of brucite fiber, 1.5 parts of glass fiber, 10 parts of epoxy resin, 5 parts of acrylate emulsion, 0.7 part of dispersing agent, 1.8 parts of diatomite and 0.3 part of rubber powder;
the dispersant is methyl cellulose; the water reducing agent is an aliphatic water reducing agent.
A preparation method of fiber reinforced concrete comprises the following steps:
the method comprises the following steps: adding the acrylate emulsion into a curing box 102 from a feeding hopper 106 of the reinforced fiber production equipment, then adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor 105, driving a spiral stirring blade 112 to rotate by the operation of the stirring motor 105 to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, and heating and drying the first mixture by starting heating wires in a first scraping plate 114 and a second scraping plate 115 to release heat;
step two: the second cylinder 111 is started, the movable rods of the second cylinder 111 contract to pull the second scraping plate 115 to move, the first mixture dried on the second scraping plate 115 is scraped off through the curing box 102, the first cylinder 107 is started, the movable rods of the four first cylinders 107 contract to pull the first scraping plate 114 to ascend, the first mixture dried on the first scraping plate 114 is scraped off through the scraping frame 113, and all the dried first mixture falls on the two crushing rollers 116;
step three: starting the crushing motor 109, driving the two crushing rollers 116 to rotate by the operation of the crushing motor 109 through the two linkage gears 117, and crushing the dried first mixture into powder;
step four: the first powdery mixture falls onto the screening plate 210 through the receiving hopper 104 and the receiving port 202, the vibration motor 207 is started, the vibration motor 207 operates to drive the screening groove 205 and the screening plate 210 to vibrate, part of the first powdery mixture passes through the screen 212 and is discharged from the fine material outlet 208 through the guide plate 211 to obtain mixed powder, and the rest of the first powdery mixture passes through the discharge port 213 and is discharged from the coarse material outlet 209;
step five: adding epoxy resin into a curing box 102 for heating and melting, adding mixed powder and a dispersing agent into the melted epoxy resin, stirring 30min under the condition of 9000 r/min, then sequentially adding carbon fiber, brucite fiber and glass fiber, stirring 60min at the rotating speed of 1400 r/min to obtain a second mixture, heating and drying the second mixture, then crushing the second mixture into powder through a crushing roller 116 to obtain a powdery second mixture, and discharging the part of the powdery second mixture from a fine material outlet 208 after passing through a screen 212 to obtain a reinforced fiber material;
step six: and uniformly stirring river sand, broken stone, cement, mineral powder, fly ash and water, adding a water reducing agent, uniformly stirring, finally adding a reinforcing fiber material, and uniformly stirring to obtain the fiber-reinforced concrete.
The performance of the fiber reinforced concrete of example 1 was tested, and the test results were as follows: the 7d compressive strength is 33.7MPa, the 14d compressive strength is 47.3MPa, and the 28d compressive strength is 62.4 MPa; the 7d flexural strength is 6.81MPa, and the 28d flexural strength is 10.98 MPa.
Example 2:
the present embodiment is different from embodiment 1 in that: the fiber reinforced concrete comprises the following components in parts by weight:
55 parts of cement, 35 parts of fly ash, 20 parts of mineral powder, 33 parts of water, 150 parts of broken stone, 130 parts of river sand, 2 parts of water reducing agent, 7 parts of carbon fiber, 3 parts of brucite fiber, 2.3 parts of glass fiber, 13 parts of epoxy resin, 8 parts of acrylate emulsion, 1.0 part of dispersing agent, 2.2 parts of diatomite and 0.4 part of rubber powder;
the dispersing agent is sodium dodecyl sulfate; the water reducing agent is a naphthalene water reducing agent.
The performance of the fiber reinforced concrete of example 2 was tested, and the test results were as follows: the 7d compressive strength is 34.3MPa, the 14d compressive strength is 48.6MPa, and the 28d compressive strength is 63.7 MPa; 7d flexural strength 7.01MPa, 28d flexural strength 11.11 MPa.
Example 3:
the present embodiment is different from embodiment 1 in that: the fiber reinforced concrete comprises the following components in parts by weight:
60 parts of cement, 40 parts of fly ash, 22 parts of mineral powder, 36 parts of water, 160 parts of broken stone, 140 parts of river sand, 3 parts of water reducing agent, 10 parts of carbon fiber, 5 parts of brucite fiber, 3 parts of glass fiber, 25 parts of epoxy resin, 10 parts of acrylate emulsion, 1.4 parts of dispersing agent, 2.6 parts of diatomite and 0.5 part of rubber powder;
the dispersing agent is sodium carboxymethyl cellulose; the water reducing agent is a polycarboxylic acid water reducing agent.
The performance of the fiber reinforced concrete of example 3 was tested, and the test results were as follows: the 7d compressive strength is 35.6MPa, the 14d compressive strength is 49.3MPa, and the 28d compressive strength is 65.1 MPa; 7d flexural strength 7.16MPa, 28d flexural strength 11.28 MPa.
Example 4:
referring to fig. 1-9, the reinforced fiber production apparatus in the present embodiment includes a pulverizing mechanism 100, a screening mechanism 200, and a conveyor 300, wherein a lower portion of one side of the pulverizing mechanism 100 is connected to the screening mechanism 200, the conveyor 300 is disposed right below one end of the screening mechanism 200, and the conveyor 300 is provided with a conveying motor 301;
wherein, the pulverizing mechanism 100 comprises a mounting frame 101, a curing box 102, a pulverizing box 103, a receiving hopper 104, a stirring motor 105, a feeding hopper 106, a first cylinder 107, a supporting frame 108, a pulverizing motor 109, a supporting plate 110, a second cylinder 111, a spiral stirring blade 112, a scraping frame 113, a first scraping plate 114, a second scraping plate 115, a pulverizing roller 116, a linkage gear 117 and a plate penetrating port 118, the curing box 102 is mounted on the top of an inner cavity of the mounting frame 101, the pulverizing box 103 is mounted at the bottom of the curing box 102, the receiving hopper 104 is mounted at the bottom of the pulverizing box 103, the stirring motor 105 is mounted at the top axis of the pulverizing box 103, the feeding hopper 106 is mounted at one side of the top of the pulverizing box 103, the first cylinder 107 is mounted at four side edges of the top of the pulverizing box 103, the supporting frame 108 is mounted at one side of the mounting frame 101, the pulverizing motor 109 is mounted in the inner cavity of, a supporting plate 110 is mounted at the top of the supporting frame 108, one side of the supporting plate 110 is connected to the mounting frame 101, and a second cylinder 111 is mounted at the top of the supporting plate 110;
a spiral stirring blade 112 is arranged in the middle of an inner cavity of the curing box 102, the top end of the spiral stirring blade 112 is connected to an output shaft of the stirring motor 105, a scraping frame 113 is mounted on the inner wall of the curing box 102, plate penetrating openings 118 are formed in four sides of the scraping frame 113, first scraping plates 114 are arranged on the inner walls of four sides of the curing box 102, the four first scraping plates 114 respectively penetrate through the four plate penetrating openings 118, the tops of the four first scraping plates 114 all penetrate through the top of the curing box 102 and are respectively connected to movable rods of four first cylinders 107, a second scraping plate 115 is arranged at the bottom of the inner cavity of the curing box 102, the second scraping plate 115 is arranged below the four first scraping plates 114, one side of the second scraping plate 115 penetrates through one side of the curing box 102 and is connected to the movable rod of a second cylinder 111, and the first scraping plates 114, the second scraping plate 115 is connected to the movable rods of the second cylinder 111, Heating wires are arranged inside the second scraping plates 115;
two crushing rollers 116 are rotatably mounted in an inner cavity of the crushing box 103 through bearings, the two crushing rollers 116 are meshed with each other, one ends of the two crushing rollers 116 are respectively sleeved with a linkage gear 117, the two linkage gears 117 are meshed and connected, and one of the crushing rollers 116 is connected to an output shaft of a crushing motor 109;
the screening mechanism 200 comprises a screening box 201, material receiving ports 202, supporting legs 203, supporting springs 204, screening grooves 205, connecting plates 206, a vibration motor 207, a fine material outlet 208, a coarse material outlet 209, a screening plate 210, a guide plate 211, a screen 212 and a material discharging port 213, wherein the material receiving ports 202 are installed at one end of the top of the screening box 201, the four supporting springs 204 are installed at the bottom of the screening box 201, the four supporting legs 203 are installed on the screening box 201 through the four supporting springs 204, the screening grooves 205 are installed in an inner cavity of the screening box 201, the two triangular connecting plates 206 are installed at the bottom of the screening grooves 205, and the vibration motor 207 is installed at one side of each of the two connecting plates 206;
screening groove 205's both ends are provided with fine material respectively and export 208, coarse material export 209, screening board 210 is installed in the slope of screening groove 205's inner chamber top, guide plate 211 is installed to screening groove 205's inner chamber bottom, screening board 210 includes screen cloth 212 and bin outlet 213, screen cloth 212 is located guide plate 211 directly over, bin outlet 213 is located coarse material export 209 directly over, screening board 210 is close to the height that fine material export 208 one end is greater than and keeps away from fine material export 208 one end, fine material export 208 is located conveyer 300 directly over, guide plate 211 is close to the height that coarse material export 209 one end is greater than and keeps away from the height of coarse material export 209 one end.
Referring to fig. 1-9, the reinforced fiber production apparatus of the present embodiment works as follows:
the method comprises the following steps: adding the acrylate emulsion into the curing box 102 from the feeding hopper 106, then adding the diatomite and the rubber powder into the acrylate emulsion, starting the stirring motor 105, driving the spiral stirring blade 112 to rotate by the operation of the stirring motor 105 to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, and heating and drying the first mixture by starting the heating wires in the first scraping plate 114 and the second scraping plate 115 to release heat;
step two: the second cylinder 111 is started, the movable rods of the second cylinder 111 contract to pull the second scraping plate 115 to move, the first mixture dried on the second scraping plate 115 is scraped off through the curing box 102, the first cylinder 107 is started, the movable rods of the four first cylinders 107 contract to pull the first scraping plate 114 to ascend, the first mixture dried on the first scraping plate 114 is scraped off through the scraping frame 113, and all the dried first mixture falls on the two crushing rollers 116;
step three: starting the crushing motor 109, driving the two crushing rollers 116 to rotate by the operation of the crushing motor 109 through the two linkage gears 117, and crushing the dried first mixture into powder;
step four: the first powdery mixture falls onto the screening plate 210 through the receiving hopper 104 and the receiving port 202, the vibration motor 207 is started, the vibration motor 207 operates to drive the screening groove 205 and the screening plate 210 to vibrate, part of the first powdery mixture passes through the screen 212 and is discharged from the fine material outlet 208 through the guide plate 211 to obtain mixed powder, and the rest of the first powdery mixture passes through the discharge port 213 and is discharged from the coarse material outlet 209;
step five: adding the epoxy resin into a curing box 102 for heating and melting, adding the mixed powder and a dispersing agent into the melted epoxy resin, stirring the mixture for 20-30min under the condition of 800-1000r/min, then sequentially adding carbon fiber, brucite fiber and glass fiber, stirring the mixture for 30-60min at the rotating speed of 1200-1600r/min to obtain a second mixture, heating and drying the second mixture, then crushing the second mixture into powder through a crushing roller 116 to obtain a powdery second mixture, and discharging the part of the powdery second mixture from a fine material outlet 208 after passing through a screen 212 to obtain the reinforced fiber material.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (9)
1. The fiber reinforced concrete is characterized by comprising the following components in parts by weight:
50-60 parts of cement, 30-40 parts of fly ash, 18-22 parts of mineral powder, 30-36 parts of water, 160 parts of gravel 140-containing materials, 140 parts of river sand, 1-3 parts of water reducing agent, 5-10 parts of carbon fiber, 1-5 parts of brucite fiber, 1.5-3 parts of glass fiber, 10-25 parts of epoxy resin, 5-10 parts of acrylate emulsion, 0.7-1.4 parts of dispersing agent, 1.8-2.6 parts of diatomite and 0.3-0.5 part of rubber powder;
the fiber reinforced concrete is prepared by the following steps:
the method comprises the following steps: adding the acrylate emulsion into a curing box (102) from a feeding hopper (106) of reinforced fiber production equipment, then adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor (105), driving a spiral stirring blade (112) to rotate by the operation of the stirring motor (105) to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, and heating and drying the first mixture by starting heating wires in a first scraping plate (114) and a second scraping plate (115) and releasing heat;
step two: starting a second air cylinder (111), wherein movable rods of the second air cylinder (111) contract to pull a second scraping plate (115) to move, a first mixture dried on the second scraping plate (115) is scraped off through a curing box (102), a first air cylinder (107) is started, movable rods of four first air cylinders (107) contract to pull a first scraping plate (114) to ascend, the first mixture dried on the first scraping plate (114) is scraped off through a scraping frame (113), and all the dried first mixtures fall onto two crushing rollers (116);
step three: starting a crushing motor (109), wherein the crushing motor (109) operates to drive two crushing rollers (116) to rotate through two linkage gears (117), and the dried first mixture is crushed into powder;
step four: the powder first mixture falls onto a screening plate (210) through a receiving hopper (104) and a receiving port (202), a vibration motor (207) is started, the vibration motor (207) operates to drive a screening groove (205) and the screening plate (210) to vibrate, a part of the powder first mixture passes through a screen (212) and is discharged from a fine material outlet (208) through a guide plate (211) to obtain mixed powder, and the rest of the powder first mixture passes through a discharge port (213) and is discharged from a coarse material outlet (209);
step five: adding epoxy resin into a curing box (102), heating and melting, adding mixed powder and a dispersing agent into the melted epoxy resin, stirring for 20-30min under the condition of 800-;
step six: and uniformly stirring river sand, broken stone, cement, mineral powder, fly ash and water, adding a water reducing agent, uniformly stirring, finally adding a reinforcing fiber material, and uniformly stirring to obtain the fiber-reinforced concrete.
2. The fiber reinforced concrete according to claim 1, wherein the dispersant is one or a mixture of several of methylcellulose, sodium lauryl sulfate and sodium carboxymethylcellulose in any proportion; the water reducing agent is one of an aliphatic water reducing agent, a naphthalene water reducing agent and a polycarboxylic acid water reducing agent.
3. The method for preparing the fiber reinforced concrete according to claim 1, comprising the steps of:
the method comprises the following steps: adding the acrylate emulsion into a curing box (102) from a feeding hopper (106) of reinforced fiber production equipment, then adding diatomite and rubber powder into the acrylate emulsion, starting a stirring motor (105), driving a spiral stirring blade (112) to rotate by the operation of the stirring motor (105) to uniformly stir the diatomite and the rubber powder in the acrylate emulsion to obtain a first mixture, and heating and drying the first mixture by starting heating wires in a first scraping plate (114) and a second scraping plate (115) and releasing heat;
step two: starting a second air cylinder (111), wherein movable rods of the second air cylinder (111) contract to pull a second scraping plate (115) to move, a first mixture dried on the second scraping plate (115) is scraped off through a curing box (102), a first air cylinder (107) is started, movable rods of four first air cylinders (107) contract to pull a first scraping plate (114) to ascend, the first mixture dried on the first scraping plate (114) is scraped off through a scraping frame (113), and all the dried first mixtures fall onto two crushing rollers (116);
step three: starting a crushing motor (109), wherein the crushing motor (109) operates to drive two crushing rollers (116) to rotate through two linkage gears (117), and the dried first mixture is crushed into powder;
step four: the powder first mixture falls onto a screening plate (210) through a receiving hopper (104) and a receiving port (202), a vibration motor (207) is started, the vibration motor (207) operates to drive a screening groove (205) and the screening plate (210) to vibrate, a part of the powder first mixture passes through a screen (212) and is discharged from a fine material outlet (208) through a guide plate (211) to obtain mixed powder, and the rest of the powder first mixture passes through a discharge port (213) and is discharged from a coarse material outlet (209);
step five: adding epoxy resin into a curing box (102), heating and melting, adding mixed powder and a dispersing agent into the melted epoxy resin, stirring for 20-30min under the condition of 800-;
step six: and uniformly stirring river sand, broken stone, cement, mineral powder, fly ash and water, adding a water reducing agent, uniformly stirring, finally adding a reinforcing fiber material, and uniformly stirring to obtain the fiber-reinforced concrete.
4. The preparation method of the fiber reinforced concrete according to claim 3, wherein the reinforced fiber production equipment comprises a powder making mechanism (100), a screening mechanism (200) and a conveyor (300), wherein the screening mechanism (200) is connected to the powder making mechanism (100) below one side of the powder making mechanism, the conveyor (300) is arranged right below one end of the screening mechanism (200), and the conveyor (300) is provided with a conveying motor (301).
5. The preparation method of the fiber reinforced concrete according to claim 4, wherein the pulverizing mechanism (100) comprises a mounting frame (101), a curing box (102), a pulverizing box (103), a receiving hopper (104), a stirring motor (105), a feeding hopper (106), a first cylinder (107), a supporting frame (108), a pulverizing motor (109), a supporting plate (110), a second cylinder (111), a spiral stirring blade (112), a scraping frame (113), a first scraping plate (114), a second scraping plate (115), a pulverizing roller (116), a linkage gear (117) and a plate penetrating port (118), the curing box (102) is mounted at the top of an inner cavity of the mounting frame (101), the pulverizing box (103) is mounted at the bottom of the curing box (102), the receiving hopper (104) is mounted at the bottom of the pulverizing box (103), the stirring motor (105) is mounted at the top axial center of the pulverizing box (103), hopper (106) are installed to the top one side of smashing case (103), first cylinder (107) are all installed to four side edges in the top of smashing case (103), support frame (108) are installed to one side of mounting bracket (101), install crushing motor (109) in the inner chamber of support frame (108), backup pad (110) are installed at the top of support frame (108), backup pad (110) one side is connected to on mounting bracket (101), second cylinder (111) are installed at the top of backup pad (110).
6. The preparation method of the fiber reinforced concrete according to claim 5, wherein a spiral stirring blade (112) is arranged in the middle of the inner cavity of the curing box (102), the top end of the spiral stirring blade (112) is connected to the output shaft of the stirring motor (105), a scraping frame (113) is installed on the inner wall of the curing box (102), plate penetrating openings (118) are formed on four sides of the scraping frame (113), first scraping plates (114) are arranged on the inner walls of the four sides of the curing box (102), four first scraping plates (114) respectively penetrate through the four plate penetrating openings (118), the tops of the four first scraping plates (114) respectively penetrate through the top of the curing box (102) and are respectively connected to the movable rods of the four first cylinders (107), and a second scraping plate (115) is arranged at the bottom of the inner cavity of the curing box (102), the second scraping plate (115) is arranged below the four first scraping plates (114), one side of the second scraping plate (115) penetrates through one side of the curing box (102) and is connected to a movable rod of the second cylinder (111), and heating wires are arranged inside the first scraping plate (114) and the second scraping plate (115).
7. The preparation method of the fiber reinforced concrete according to claim 5, wherein two crushing rollers (116) are rotatably mounted in an inner cavity of the crushing box (103) through bearings, the two crushing rollers (116) are meshed with each other, one ends of the two crushing rollers (116) are respectively sleeved with a linkage gear (117), the two linkage gears (117) are meshed and connected with each other, and one of the crushing rollers (116) is connected to an output shaft of a crushing motor (109).
8. The preparation method of the fiber reinforced concrete according to claim 4, wherein the screening mechanism (200) comprises a screening box (201), a material receiving port (202), support legs (203), support springs (204), a screening groove (205), a connecting plate (206), a vibration motor (207), a fine material outlet (208), a coarse material outlet (209), a screening plate (210), a guide plate (211), a screen (212) and a material outlet (213), the material receiving port (202) is installed at one end of the top of the screening box (201), the four support springs (204) are installed at the bottom of the screening box (201), the four support springs (203) are installed on the screening box (201) through the four support springs (204), the screening groove (205) is installed in the inner cavity of the screening box (201), the two triangular connecting plates (206) are installed at the bottom of the screening groove (205), and a vibration motor (207) is arranged on one side of each of the two connecting plates (206).
9. The method for preparing fiber reinforced concrete according to claim 8, both ends of the screening groove (205) are respectively provided with a fine material outlet (208) and a coarse material outlet (209), the top of the inner cavity of the screening groove (205) is obliquely provided with a screening plate (210), the bottom of the inner cavity of the screening groove (205) is provided with a guide plate (211), the screening plate (210) comprises a screen (212) and a discharge opening (213), the screen (212) is positioned right above the guide plate (211), the discharge opening (213) is positioned right above the coarse material outlet (209), the height of one end of the screening plate (210) close to the fine material outlet (208) is larger than that of one end far away from the fine material outlet (208), the fine material outlet (208) is positioned right above the conveyor (300), and the height of one end, close to the coarse material outlet (209), of the guide plate (211) is larger than that of one end, far away from the coarse material outlet (209).
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| CN202011097451.3A CN112266208A (en) | 2020-10-14 | 2020-10-14 | Fiber-reinforced concrete and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113910479A (en) * | 2021-12-03 | 2022-01-11 | 重庆石墨烯研究院有限公司 | Preparation method of graphene plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113910479A (en) * | 2021-12-03 | 2022-01-11 | 重庆石墨烯研究院有限公司 | Preparation method of graphene plate |
| CN113910479B (en) * | 2021-12-03 | 2024-06-11 | 重庆石墨烯研究院有限公司 | Preparation method of graphene plate |
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