CN113087483A - Low-shrinkage low-viscosity high-strength concrete and preparation method thereof - Google Patents
Low-shrinkage low-viscosity high-strength concrete and preparation method thereof Download PDFInfo
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- CN113087483A CN113087483A CN202110409058.1A CN202110409058A CN113087483A CN 113087483 A CN113087483 A CN 113087483A CN 202110409058 A CN202110409058 A CN 202110409058A CN 113087483 A CN113087483 A CN 113087483A
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/10—Mixing in containers not actuated to effect the mixing
- B28C5/12—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers
- B28C5/16—Mixing in containers not actuated to effect the mixing with stirrers sweeping through the materials, e.g. with incorporated feeding or discharging means or with oscillating stirrers the stirrers having motion about a vertical or steeply inclined axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
- B28C5/402—Methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/12—Supplying or proportioning liquid ingredients
- B28C7/122—Supplying or proportioning liquid ingredients by means of a measuring chamber, e.g. container
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/12—Supplying or proportioning liquid ingredients
- B28C7/126—Supply means, e.g. nozzles
- B28C7/128—Nozzles; Valves; Valve-actuating means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a formula of low-shrinkage low-viscosity high-strength concrete, which comprises the following components in parts by weight: 350 parts of cement 300-350 parts, 80-100 parts of water, 330 parts of crushed stone 300-330 parts, 340 parts of river sand 310-85 parts, fly ash 70-85 parts, metakaolin 50-65 parts, silica fume 50-70 parts, micro silicon powder 35-50 parts, steel fiber 8-16 parts, phosphogypsum 30-45 parts, water reducing agent 15-20 parts and expanding agent 10-16 parts; the invention also discloses a preparation method of the low-shrinkage low-viscosity high-strength concrete, which comprises five preparation steps. The formula of the low-shrinkage low-viscosity high-strength concrete provided by the invention comprises cement, water, broken stone, river sand, fly ash, metakaolin, silica fume, micro silicon powder, steel fiber, phosphogypsum, a water reducing agent and an expanding agent, and the concrete prepared by the formula is dense in internal accumulation, low in porosity, high in strength, good in shrinkage resistance and low in viscosity.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to low-shrinkage low-viscosity high-strength concrete and a preparation method thereof.
Background
The concrete is one of the most important civil engineering materials in the present generation, and is an artificial stone material prepared from a cementing material, granular aggregate (also called aggregate), water, and additives and admixtures which are added as necessary according to a certain proportion, and the artificial stone material is prepared by uniformly stirring, compacting, curing and hardening. The high-strength concrete is a typical product developed by the modern concrete preparation technology, and can have high strength and high durability by means of material optimization, water-cement ratio control, admixture incorporation and the like.
However, since the water-cement ratio is low, the self-drying phenomenon of the high-strength concrete caused by the rapid consumption of mixing water due to the hydration reaction of cement is more remarkable than that of the common concrete, and the high-strength concrete has large shrinkage deformation and is easy to crack, thereby threatening the safety and the service life of the structure.
Disclosure of Invention
The invention aims to provide low-shrinkage low-viscosity high-strength concrete and a preparation method thereof, so as to solve the problems in the background technology.
The technical scheme of the invention is realized as follows:
the invention provides a formula of low-shrinkage low-viscosity high-strength concrete, which comprises the following components in parts by weight: 350 parts of cement 300-350 parts, 80-100 parts of water, 330 parts of crushed stone 300-330 parts, 340 parts of river sand 310-85 parts, fly ash 70-85 parts, metakaolin 50-65 parts, silica fume 50-70 parts, micro silicon powder 35-50 parts, steel fiber 8-16 parts, phosphogypsum 30-45 parts, water reducing agent 15-20 parts and expanding agent 10-16 parts.
The invention also provides a preparation method of the low-shrinkage low-viscosity high-strength concrete, which comprises the following steps:
s1, pouring cement, water, gravel and river sand into a stirring tank in sequence through a feeding pipe, stirring for 2-3 minutes, and fully stirring the cement, the water, the gravel and the river sand through a stirring mechanism to uniformly mix the cement, the water, the gravel and the river sand;
s2, pouring the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum into a stirring tank, stirring and mixing the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum with the mixture obtained in the step 1, and continuously stirring for 2-3 minutes to fully mix the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum with the mixture obtained in the step 1 under the action of a stirring mechanism;
s3, pouring the water reducing agent and the expanding agent into a stirring tank through a metering mechanism, stirring and mixing the mixture obtained in the step 2, and continuously stirring for 2-3 minutes;
s4, finally, adding steel fibers into the mixture obtained in the step 3 through a metering mechanism, and continuously stirring for 2-3 minutes to uniformly mix the steel fibers with the mixture obtained in the step 3;
s5, opening a discharge control valve, injecting the mixture obtained in the step 4 into a mold through a discharge pipe, and putting the mold into a curing chamber for curing to obtain the low-shrinkage low-viscosity high-strength concrete.
Preferably, a stirring mechanism is arranged on the stirring tank, the bottom of the stirring tank is communicated with a discharge pipe, a discharge control valve is fixedly mounted on the discharge pipe, the top of the stirring tank is communicated with a feed pipe, a first bearing is fixedly mounted in the middle of the top of the stirring tank, and a second bearing is fixedly mounted in the middle of the bottom of the stirring tank;
rabbling mechanism includes agitator motor and circular rotation mobile jib, agitator motor passes through rectangle backup pad fixed mounting in the top middle part of agitator tank, circular rotation mobile jib pass through the shaft coupling with agitator motor's pivot fixed connection, the end fixing of circular rotation mobile jib runs through the primary shaft holds, just the tip of circular rotation mobile jib extends into the inside of agitator tank, fixed mounting has stirring branch on the circular rotation mobile jib, the circular bottom fixed mounting who rotates the mobile jib has circular rotation branch, fixed mounting has helical blade on the circular rotation branch, the circular tip that rotates the mobile jib with the inner ring inner wall fixed connection of secondary shaft holds.
By adopting the technical scheme, raw materials required by concrete are poured into the stirring tank through the feeding pipe, the stirring motor is started, the stirring motor drives the circular rotating main rod and the circular rotating branch rod to rotate, the circular rotating main rod drives the stirring branch rod to stir the concrete in the stirring tank, meanwhile, the circular rotating main rod can drive the scraper blade to rotate through the connecting round rod while rotating, the scraper blade can scrape the concrete adhered to the inner wall of the stirring tank in the rotating process, meanwhile, the scraper blade can stir partial concrete with small stress because of being far away from the stirring branch rod, the circular rotating branch rod drives the helical blade to rotate, the concrete in the stirring tank can automatically flow downwards due to gravity, and the helical blade can stir the concrete at the bottom in the stirring tank upwards, so that the concrete in the stirring tank is fully stirred under the matching of the helical blade, the stirring branch rod and the scraper blade, the stirring efficiency is improved.
As preferred, rabbling mechanism is still including connecting the round bar, connect round bar fixed mounting in circular rotation mobile jib is last, just it is provided with two, two to connect the round bar with circular rotation mobile jib's central line symmetry sets up, two the equal fixed mounting of tip of connecting the round bar has the scraper blade, the scraper blade is close to one side of agitator tank is the arc setting.
Through adopting above-mentioned technical scheme, through the scraper blade that sets up, be convenient for in time strike off the concrete that bonds on the agitator tank inner wall, the scraper blade can mix because of keeping away from stirring branch and the less partial concrete of atress simultaneously to improve stirring efficiency.
As preferred, still be equipped with wiper mechanism on the agitator tank, wiper mechanism includes annular water pipe, annular water pipe fixed mounting be in the upper end of agitator tank inner wall, the intercommunication has high pressure nozzle on the annular water pipe, high pressure nozzle equidistance at least sets up six, the intercommunication has the water guide hard tube on the annular water pipe, the fixed running through in top of water guide hard tube the top of agitator tank, just the fixed intercommunication of rotary joint has coupling hose at top of water guide hard tube.
Through adopting above-mentioned technical scheme, through the wiper mechanism who sets up, be convenient for wash agitator tank inside after concrete preparation is accomplished, prevent that the inside concrete of agitator tank from causing the phenomenon of sclerosis because of not obtaining in time washing, reducing the efficiency of stirring, improving material cost.
Preferably, the stirring tank is further provided with a metering mechanism, the metering mechanism comprises a metering hopper and a circular cover plate, the metering hopper is made of transparent glass, the surface of the metering hopper is provided with scale marks, the bottom of the metering hopper is communicated with a communicating pipe, the end part of the communicating pipe is communicated with the inside of the stirring tank, a metering control valve is fixedly mounted on the communicating pipe, the top of the metering hopper is communicated with a liquid inlet pipe, the bottom of the circular cover plate is fixedly provided with a plug, the upper end of the inner side wall of the liquid inlet pipe is provided with internal threads matched with the plug, and the plug is in threaded connection with the inside of the liquid inlet pipe.
Through adopting above-mentioned technical scheme, through the metering mechanism who sets up, be convenient for carry out accurate measurement when adding the additive to agitator tank inside, prevent to add too much or too little additive and cause the influence to the quality of concrete.
Preferably, the top of the circular cover plate is fixedly provided with a handle through a threaded nail.
Through adopting above-mentioned technical scheme, through the handle that sets up, be convenient for to the round cover plate application of force to be convenient for twist round cover plate.
Preferably, the inner bottom of the stirring tank is inclined towards the discharge pipe, and the inclination angle of the inner bottom of the stirring tank is set to be 70-80 degrees.
By adopting the technical scheme, the inner bottom of the stirring tank is inclined towards the discharge pipe by 70-80 degrees, so that concrete in the stirring tank automatically flows towards the discharge pipe, the discharging speed is accelerated, and the discharging efficiency is improved.
Preferably, a protective cover shell is fixedly mounted on the stirring motor, a heat dissipation through hole is formed in the protective cover shell, and a filter screen is fixedly mounted inside the heat dissipation through hole.
Through adopting above-mentioned technical scheme, through the protective housing who sets up, prevent that the dust in the feeding process from causing the pollution to agitator motor, simultaneously through the heat dissipation through-hole and the filter screen that set up, when carrying out ventilation cooling to agitator motor, carry out isolated filtration to the dust of feeding in-process, guaranteed agitator motor's normal use.
Preferably, the bottom of the stirring tank is fixedly provided with a support leg.
Through adopting above-mentioned technical scheme, through the effect of landing leg, improved the bearing capacity of agitator tank.
Compared with the prior art, the invention has the beneficial effects that:
1. the formula of the low-shrinkage low-viscosity high-strength concrete provided by the invention comprises cement, water, broken stone, river sand, fly ash, metakaolin, silica fume, micro silicon powder, steel fiber, phosphogypsum, a water reducing agent and an expanding agent, wherein the interior of the concrete prepared by the formula is densely piled, the porosity is lower, the strength is higher, the shrinkage resistance is better, and the viscosity is lower;
2. the stirring mechanism is matched with the spiral blade, the stirring support rod and the scraper plate to fully stir the concrete in the stirring tank, so that the stirring efficiency is improved;
3. the cleaning mechanism can clean the interior of the stirring tank in time, and prevent the concrete in the stirring tank from hardening due to the fact that the concrete is not cleaned in time, so that the stirring efficiency is improved, and the raw material cost is reduced;
4. the invention can realize accurate measurement of the additive through the arranged measuring mechanism, thereby ensuring the quality of the finished product of the concrete.
Drawings
FIG. 1 is a flow chart of the low shrinkage, low viscosity, high strength concrete and method of making the same of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
FIG. 3 is a second schematic structural diagram of the present invention;
FIG. 4 is a schematic cross-sectional view illustrating an embodiment of the present invention;
FIG. 5 is a second schematic cross-sectional view of the embodiment of the present invention;
FIG. 6 is a third schematic cross-sectional view illustrating an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a stirring mechanism according to an embodiment of the present invention;
FIG. 8 is an enlarged view of the metering mechanism of the embodiment of the present invention;
FIG. 9 is an enlarged view of portion A of FIG. 8 according to the present invention.
In the figure: 1. a stirring tank; 101. a feed pipe; 102. a discharge pipe; 1021. a discharge control valve; 103. a support leg; 104. a rectangular support plate; 2. a stirring motor; 201. a protective housing; 2011. a heat dissipating through hole; 202. a first bearing; 203. a second bearing; 3. a circular rotating main rod; 301. stirring the supporting rod; 4. a circular rotating support rod; 5. a helical blade; 6. connecting the round rod; 7. a squeegee; 8. an annular water pipe; 801. a high pressure spray head; 9. a water guide hard pipe; 901. a rotary joint; 10. a connecting hose; 11. a measuring hopper; 1101. scale lines; 12. a communicating pipe; 1201. a metering control valve; 13. a liquid inlet pipe; 1301. an internal thread; 14. a circular cover plate; 1401. a handle; 15. and (5) plugging with a thread.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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
The formula of the low-shrinkage low-viscosity high-strength concrete comprises the following components in parts by weight: 350 parts of cement, 100 parts of water, 330 parts of broken stone, 340 parts of river sand, 85 parts of fly ash, 65 parts of metakaolin, 70 parts of silica fume, 50 parts of micro silicon powder, 16 parts of steel fiber, 45 parts of phosphogypsum, 15-20 parts of water reducing agent and 16 parts of expanding agent.
Referring to the above formulation and fig. 1 to 9, the present embodiment is a method for preparing a low shrinkage, low viscosity and high strength concrete, comprising the following steps:
s1, pouring cement, water, gravel and river sand into the stirring tank 1 through the feeding pipe 101 in sequence, stirring for 2-3 minutes, and fully stirring the cement, the water, the gravel and the river sand through the stirring mechanism to uniformly mix the cement, the water, the gravel and the river sand;
s2, pouring the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum into a stirring tank 1, stirring and mixing the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum with the mixture obtained in the step 1, and continuously stirring for 2-3 minutes to fully mix the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum with the mixture obtained in the step 1 under the action of a stirring mechanism;
s3, pouring the water reducing agent and the expanding agent into the stirring tank 1 through a metering mechanism, stirring and mixing the mixture obtained in the step 2, and continuously stirring for 2-3 minutes;
s4, finally, adding steel fibers into the mixture obtained in the step 3 through a metering mechanism, and continuously stirring for 2-3 minutes to uniformly mix the steel fibers with the mixture obtained in the step 3;
and S5, opening the discharge control valve 1021, injecting the mixture obtained in the step 4 into a mould through the discharge pipe 102, and putting the mould into a curing chamber for curing to obtain the low-shrinkage low-viscosity high-strength concrete.
Example 2
The present embodiment is different from embodiment 1 in that: the formula of the low-shrinkage low-viscosity high-strength concrete comprises the following components in parts by weight: 330 parts of cement, 90 parts of water, 315 parts of crushed stone, 330 parts of river sand, 77 parts of fly ash, 58 parts of metakaolin, 60 parts of silica fume, 40 parts of micro silicon powder, 12 parts of steel fiber, 36 parts of phosphogypsum, 17 parts of water reducing agent and 13 parts of expanding agent.
Example 3
The present embodiment is different from embodiment 2 in that: the formula of the low-shrinkage low-viscosity high-strength concrete comprises the following components in parts by weight: 300 parts of cement, 80 parts of water, 300 parts of broken stone, 310 parts of river sand, 70 parts of fly ash, 50 parts of metakaolin, 50 parts of silica fume, 35 parts of micro silicon powder, 8 parts of steel fiber, 30 parts of phosphogypsum, 15 parts of water reducing agent and 10 parts of expanding agent.
Example 4
The present embodiment is different from embodiment 3 in that: the stirring tank 1 is provided with a stirring mechanism, the bottom of the stirring tank 1 is communicated with a discharge pipe 102, the inner bottom of the stirring tank 1 is inclined toward the discharge pipe 102, the inclination angle of the inner bottom of the stirring tank 1 is set to 70-80 degrees, by obliquely setting the inner bottom of the stirring tank 1 at 70-80 deg. towards the discharge pipe 102, so that the concrete in the stirring tank 1 automatically flows towards the position of the discharge pipe 102, the discharge speed is accelerated, the discharge efficiency is improved, a discharging control valve 1021 is fixedly arranged on the discharging pipe 102, supporting legs 103 are fixedly arranged at the bottom of the stirring tank 1, the bearing capacity of the stirring tank 1 is improved through the action of the supporting legs 103, the top of the stirring tank 1 is communicated with a feeding pipe 101, a first bearing 202 is fixedly installed in the middle of the top of the stirring tank 1, and a second bearing 203 is fixedly installed in the middle of the bottom inside the stirring tank 1;
the stirring mechanism comprises a stirring motor 2, a circular rotating main rod 3 and a connecting round rod 6, the stirring motor 2 is fixedly mounted at the middle part of the top of the stirring tank 1 through a rectangular supporting plate 104, a protective housing 201 is fixedly mounted on the stirring motor 2, a heat dissipation through hole 2011 is formed in the protective housing 201, a filter screen is fixedly mounted inside the heat dissipation through hole 2011, dust in the feeding process is prevented from polluting the stirring motor 2 through the arranged protective housing 201, meanwhile, the heat dissipation through hole 2011 and the filter screen are arranged, when the stirring motor 2 is ventilated and cooled, the dust in the feeding process is isolated and filtered, the normal use of the stirring motor 2 is ensured, the circular rotating main rod 3 is fixedly connected with the rotating shaft of the stirring motor 2 through a coupler, the end part of the circular rotating main rod 3 is fixed to run through the first bearing 202, the end of the circular rotating main rod 3 extends into the stirring tank 1, a stirring branch rod 301 is fixedly mounted on the circular rotating main rod 3, a circular rotating branch rod 4 is fixedly mounted at the bottom of the circular rotating main rod 3, a helical blade 5 is fixedly mounted on the circular rotating branch rod 4, the end of the circular rotating main rod 3 is fixedly connected with the inner wall of the inner ring of the second bearing 203, two connecting circular rods 6 are fixedly mounted on the circular rotating main rod 3, the two connecting circular rods 6 are symmetrically arranged on the central line of the circular rotating main rod 3, scraping plates 7 are fixedly mounted at the ends of the two connecting circular rods 6, and one side of each scraping plate 7, which is close to the stirring tank 1, is in an arc shape;
the stirring principle of the stirring mechanism is as follows: starting the stirring motor 2, the stirring motor 2 drives the circular rotating main rod 3 and the circular rotating branch rod 4 to rotate, the circular rotating main rod 3 drives the stirring branch rod 301 to stir the concrete inside the stirring tank 1, meanwhile, the circular rotating main rod 3 can drive the scraper 7 to rotate through the connecting round rod 6 while rotating, the scraper 7 can scrape off the concrete adhered to the inner wall of the stirring tank 1 in the rotating process, meanwhile, the scraper 7 can stir the part of the concrete with smaller stress because of being far away from the stirring branch rod 301, the circular rotating branch rod 4 drives the helical blade 5 to rotate, the concrete inside the stirring tank 1 can automatically flow downwards because of gravity, the helical blade 5 can upwards stir the concrete at the bottom inside the stirring tank 1, and therefore, under the matching of the helical blade 5, the stirring branch rod 301 and the scraper 7, the concrete inside the stirring tank 1 can be fully stirred, the stirring efficiency is improved.
Example 5
This embodiment is different from embodiment 4 in that: the stirring tank 1 is provided with a cleaning mechanism, the cleaning mechanism comprises an annular water pipe 8, the annular water pipe 8 is fixedly installed at the upper end of the inner wall of the stirring tank 1, the annular water pipe 8 is communicated with high-pressure nozzles 801, at least six high-pressure nozzles 801 are arranged at equal intervals, the annular water pipe 8 is communicated with a water guide hard pipe 9, the top of the water guide hard pipe 9 fixedly penetrates through the top of the stirring tank 1, and the top of the water guide hard pipe 9 is fixedly communicated with a connecting hose 10 through a rotary joint 901;
cleaning principle of the cleaning mechanism: connect the water source with coupling hose 10's one end, pass through rotary joint 901 with coupling hose 10's the other end with coupling hose 10 and water guide hard tube 9 fixed connection, rivers pass through coupling hose 10 and water guide hard tube 9 and flow in annular water pipe 8, rethread high pressure nozzle 801 sprays 1 inside of agitator tank, in time wash 1 inside of agitator tank, prevent that 1 inside concrete of agitator tank from leading to the fact the phenomenon of sclerosis because of not obtaining in time washing, thereby improve the efficiency of stirring, reduce material cost.
Example 6
This embodiment is different from embodiment 5 in that: the stirring tank 1 is provided with a metering mechanism, the metering mechanism comprises a metering hopper 11 and a circular cover plate 14, the metering hopper 11 is made of transparent glass, and the surface of the measuring hopper 11 is provided with scale marks 1101, the bottom of the measuring hopper 11 is communicated with a communicating pipe 12, the end of the communicating pipe 12 is communicated with the inside of the stirring tank 1, a metering control valve 1201 is fixedly arranged on the communicating pipe 12, the top of the measuring hopper 11 is communicated with a liquid inlet pipe 13, the top of the circular cover plate 14 is fixedly provided with a handle 1401 through a screw nail, the handle 1401 is arranged to apply force to the circular cover plate 14 conveniently, thereby facilitating the screwing of the circular cover plate 14, the bottom of the circular cover plate 14 is fixedly provided with a plug 15, the upper end of the inner side wall of the liquid inlet pipe 13 is provided with an internal thread 1301 matched with the pipe plug 15, and the pipe plug 15 is in threaded connection with the inside of the liquid inlet pipe 13;
the metering principle of the metering mechanism is as follows: the round cover plate 14 is rotated anticlockwise through the handle 1401, the pipe plug 15 is separated from the inside of the liquid inlet pipe 13, then required additives are added into the measuring hopper 11 through the liquid inlet pipe 13, the quantity of the additives required to be added is controlled by observing the scale marks 1101 on the surface of the measuring hopper 11, after the required quantities are reached, the additives are stopped being added, the round cover plate 14 is screwed clockwise through the handle 1401, the pipe plug 15 is screwed into the liquid inlet pipe 13 again, the additives in the measuring hopper 11 are prevented from being polluted by external dust, then the metering control valve 1201 is opened, specific quantities of the additives are added into the stirring tank 1 through the communicating pipe 12, accurate metering is achieved, and the quality of finished products of concrete is guaranteed.
According to the technical scheme, the working steps of the scheme are summarized and carded:
the raw materials needed by concrete are poured into the stirring tank 1 through the feeding pipe 101, the stirring motor 2 is started, the stirring motor 2 drives the circular rotating main rod 3 and the circular rotating branch rod 4 to rotate, the circular rotating main rod 3 drives the stirring branch rod 301 to stir the concrete in the stirring tank 1, meanwhile, the circular rotating main rod 3 can drive the scraper 7 to rotate through the connecting round rod 6 while rotating, the scraper 7 can scrape off the concrete adhered to the inner wall of the stirring tank 1 in the rotating process, meanwhile, the scraper 7 can stir the part of the concrete with smaller stress because of being far away from the stirring branch rod 301, the circular rotating branch rod 4 drives the helical blade 5 to rotate, under the matching of the helical blade 5, the stirring branch rod 301 and the scraper 7, the concrete in the stirring tank 1 is fully stirred, the stirring efficiency is improved, when an additive is required to be added into the stirring tank 1, the required additive is added into the measuring hopper 11 through the liquid inlet pipe 13, the quantity of the additive to be added is controlled by observing the scale mark 1101 on the surface of the measuring hopper 11, after the required quantity is reached, the metering control valve 1201 is opened, the additive with the specific quantity is added into the stirring tank 1 through the communicating pipe 12, the accurate metering is realized, the finished product quality of the concrete is ensured, after the concrete is prepared, the discharging control valve 1021 is opened, the concrete is discharged from the discharging pipe 102, then the concrete is injected into a mold and then is put into a curing chamber for curing, when the interior of the stirring tank 1 needs to be cleaned, one end of the connecting hose 10 is communicated with a water source, the other end of the connecting hose 10 is fixedly connected with the water guide hard pipe 9 through the rotary joint 901, water flows into the annular water pipe 8 through the connecting hose 10 and the water guide hard pipe 9, the interior of the stirring tank 1 is sprayed through the high-pressure spray nozzle 801, the interior of the stirring tank 1 is timely cleaned, and the phenomenon that the concrete in the stirring tank 1 is hardened due to the fact that the concrete is not timely cleaned is avoided, so that stirring efficiency is improved, and raw material cost is reduced.
In conclusion, the formula of the low-shrinkage low-viscosity high-strength concrete provided by the invention comprises cement, water, broken stone, river sand, fly ash, metakaolin, silica fume, micro silicon powder, steel fiber, phosphogypsum, a water reducing agent and an expanding agent, and the concrete prepared by the formula is dense in internal accumulation, low in porosity, high in strength, good in shrinkage resistance and low in viscosity; the concrete in the stirring tank 1 is fully stirred by the arranged stirring mechanism under the matching of the helical blade 5, the stirring support rod 301 and the scraper 7, so that the stirring efficiency is improved; the interior of the stirring tank 1 can be cleaned in time through the cleaning mechanism, so that the phenomenon that concrete in the stirring tank 1 is hardened because the concrete is not cleaned in time is prevented, the stirring efficiency is improved, and the raw material cost is reduced; the additive can be accurately metered by the metering mechanism, and the quality of the finished concrete product is ensured.
It is to be noted that the water reducing agent can be selected from a polycarboxylate water reducing agent, and the expanding agent can be selected from a calcium oxide concrete expanding agent.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The low-shrinkage low-viscosity high-strength concrete is characterized by comprising the following components in parts by weight: 350 parts of cement 300-350 parts, 80-100 parts of water, 330 parts of crushed stone 300-330 parts, 340 parts of river sand 310-85 parts, fly ash 70-85 parts, metakaolin 50-65 parts, silica fume 50-70 parts, micro silicon powder 35-50 parts, steel fiber 8-16 parts, phosphogypsum 30-45 parts, water reducing agent 15-20 parts and expanding agent 10-16 parts.
2. The preparation method of the low-shrinkage low-viscosity high-strength concrete is characterized by comprising the following steps of:
s1, pouring cement, water, gravel and river sand into a stirring tank (1) in sequence through a feeding pipe 101, stirring for 2-3 minutes, and fully stirring the cement, the water, the gravel and the river sand through a stirring mechanism to uniformly mix the cement, the water, the gravel and the river sand;
s2, pouring the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum into a stirring tank (1), stirring and mixing the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum with the mixture obtained in the step 1, and continuously stirring for 2-3 minutes to fully mix the fly ash, the metakaolin, the silica fume, the micro silicon powder and the phosphogypsum with the mixture obtained in the step 1 under the action of a stirring mechanism;
s3, pouring the water reducing agent and the expanding agent into the stirring tank (1) through a metering mechanism, stirring and mixing the mixture obtained in the step 2, and continuously stirring for 2-3 minutes;
s4, finally, adding steel fibers into the mixture obtained in the step 3 through a metering mechanism, and continuously stirring for 2-3 minutes to uniformly mix the steel fibers with the mixture obtained in the step 3;
and S5, opening a discharge control valve (1021), injecting the mixture obtained in the step 4 into a mould through a discharge pipe (102), and putting the mould into a curing chamber for curing to obtain the low-shrinkage low-viscosity high-strength concrete.
3. The preparation method of the low-shrinkage low-viscosity high-strength concrete according to claim 2, characterized in that a stirring mechanism is arranged on the stirring tank (1), a discharge pipe (102) is communicated with the bottom of the stirring tank (1), a discharge control valve (1021) is fixedly installed on the discharge pipe (102), a feed pipe (101) is communicated with the top of the stirring tank (1), a first bearing (202) is fixedly installed in the middle of the top of the stirring tank (1), and a second bearing (203) is fixedly installed in the middle of the bottom of the inside of the stirring tank (1);
the stirring mechanism comprises a stirring motor (2) and a circular rotating main rod (3), the stirring motor (2) is fixedly arranged in the middle of the top of the stirring tank (1) through a rectangular supporting plate (104), the circular rotating main rod (3) is fixedly connected with a rotating shaft of the stirring motor (2) through a coupler, the end part of the circular rotating main rod (3) is fixedly penetrated through the first bearing (202), and the end part of the circular rotating main rod (3) extends into the stirring tank (1), a stirring branch rod (301) is fixedly arranged on the circular rotating main rod (3), a round rotating support rod (4) is fixedly arranged at the bottom of the round rotating main rod (3), the circular rotating support rod (4) is fixedly provided with a helical blade (5), the end part of the circular rotating main rod (3) is fixedly connected with the inner wall of the inner ring of the second bearing (203).
4. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 3, wherein the concrete comprises the following components in percentage by weight: rabbling mechanism is still including connecting round bar (6), connect round bar (6) fixed mounting in circular rotation mobile jib (3) is last, just connect round bar (6) and be provided with two, two connect round bar (6) with circular rotation mobile jib (3) central line symmetry sets up, two the equal fixed mounting of tip of connecting round bar (6) has scraper blade (7), scraper blade (7) are close to one side of agitator tank (1) is the arc setting.
5. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 4, wherein the concrete comprises the following components in percentage by weight: still be equipped with wiper mechanism on agitator tank (1), wiper mechanism includes annular water pipe (8), annular water pipe (8) fixed mounting be in the upper end of agitator tank (1) inner wall, the intercommunication has high pressure nozzle (801) on annular water pipe (8), high pressure nozzle (801) equidistance at least sets up six, the intercommunication has water guide hard tube (9) on annular water pipe (8), the top of water guide hard tube (9) is fixed to be run through the top of agitator tank (1), just the top of water guide hard tube (9) has coupling hose (10) through the fixed intercommunication of rotary joint (901).
6. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 5, wherein the concrete comprises the following components in percentage by weight: still be equipped with metering mechanism on agitator tank (1), metering mechanism includes weighing hopper (11) and circular apron (14), weighing hopper (11) are made by clear glass, just the surface of weighing hopper (11) is provided with scale mark (1101), the bottom intercommunication of weighing hopper (11) has communicating pipe (12), the tip of communicating pipe (12) with the inside of agitator tank (1) is linked together, fixed mounting has metering control valve (1201) on communicating pipe (12), the top intercommunication of weighing hopper (11) has feed liquor pipe (13), the bottom fixed mounting of circular apron (14) has plug (15), the upper end of feed liquor pipe (13) inside wall seted up with internal thread (1301) that plug (15) mutually supported, plug (15) threaded connection be in the inside of feed liquor pipe (13).
7. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 6, wherein the concrete comprises the following components in percentage by weight: the top of the circular cover plate (14) is fixedly provided with a handle (1401) through a screw nail.
8. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 7, wherein the concrete comprises the following components in percentage by weight: the inner bottom of the stirring tank (1) is obliquely arranged towards the discharge pipe (102), and the inclination angle of the inner bottom of the stirring tank (1) is set to be 70-80 degrees.
9. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 8, wherein the concrete comprises the following components in percentage by weight: fixed mounting has protective housing (201) on agitator motor (2), heat dissipation through-hole (2011) has been seted up on protective housing (201), just the inside fixed mounting of heat dissipation through-hole (2011) has the filter screen.
10. The low-shrinkage low-viscosity high-strength concrete and the preparation method thereof according to claim 9, wherein: the bottom of the stirring tank (1) is fixedly provided with supporting legs (103).
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| CN114409312A (en) * | 2021-11-30 | 2022-04-29 | 嘉兴征宇混凝土制品有限公司 | Environment-friendly concrete mortar multiple mixed material and preparation method thereof |
| CN114940606A (en) * | 2022-06-24 | 2022-08-26 | 兴宁市创强混凝土有限公司 | High-strength concrete and preparation method thereof |
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