CN116969706A - Preparation method of coconut shell bionic type reinforced recycled coarse aggregate - Google Patents
Preparation method of coconut shell bionic type reinforced recycled coarse aggregate Download PDFInfo
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- CN116969706A CN116969706A CN202311004986.5A CN202311004986A CN116969706A CN 116969706 A CN116969706 A CN 116969706A CN 202311004986 A CN202311004986 A CN 202311004986A CN 116969706 A CN116969706 A CN 116969706A
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- coarse aggregate
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- slag powder
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- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 235000013162 Cocos nucifera Nutrition 0.000 title claims abstract description 21
- 244000060011 Cocos nucifera Species 0.000 title claims abstract description 21
- 239000011664 nicotinic acid Substances 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 67
- 239000000843 powder Substances 0.000 claims abstract description 48
- 239000002893 slag Substances 0.000 claims abstract description 38
- 239000000835 fiber Substances 0.000 claims abstract description 32
- 238000004513 sizing Methods 0.000 claims abstract description 28
- 238000005507 spraying Methods 0.000 claims abstract description 23
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000010881 fly ash Substances 0.000 claims abstract description 17
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000011574 phosphorus Substances 0.000 claims abstract description 16
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 18
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 18
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005728 strengthening Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 230000015271 coagulation Effects 0.000 abstract description 2
- 238000005345 coagulation Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1077—Cements, e.g. waterglass
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
Abstract
The application provides a preparation method of coconut shell bionic reinforced recycled coarse aggregate, which relates to the technical field of coarse aggregate processing, and comprises a sizing machine, a powdering machine, a conveying belt and recycled coarse aggregate, wherein the recycled coarse aggregate is formed into a coconut shell bionic structure through the processes of spraying and wrapping slurry, bonding fiber and secondarily spraying and wrapping slurry, so that the strength of the recycled coarse aggregate can be improved, the water absorption rate of the recycled coarse aggregate is reduced, the inherent defect of the recycled coarse aggregate is overcome, the large-scale application of the recycled coarse aggregate is promoted, and common industrial solid wastes such as fly ash, slag powder and phosphorus slag powder and the like and an exciting agent are prepared into slurry for reinforcing the recycled coarse aggregate. The rapid coagulation characteristic of the alkali-activated material improves the strengthening treatment efficiency of the recycled coarse aggregate, and the treated aggregate can be used for production.
Description
Technical Field
The application relates to the technical field of coarse aggregate processing, in particular to a preparation method of coconut shell bionic reinforced recycled coarse aggregate.
Background
The application of the recycled coarse aggregate is an effective way for treating the construction waste, not only can reduce the pollution of the construction waste to the environment, but also can reduce the consumption of natural aggregate resources, is an important way for green sustainable development, and has remarkable social, economic and environmental benefits.
The existing recycled coarse aggregate has the defects of high crushing value, high water absorption rate and the like, so that the substitution rate is low when the recycled coarse aggregate is used for preparing concrete, and the large-scale application of the recycled coarse aggregate is hindered.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the application provides a preparation method of coconut shell bionic reinforced recycled coarse aggregate, which solves the defects of high crushing value and high water absorption rate of the recycled coarse aggregate.
Technical proposal
In order to achieve the above purpose, the application is realized by the following technical scheme: the preparation method of the coconut shell bionic reinforced recycled coarse aggregate comprises a sizing machine, a powdering machine, a conveying belt and the recycled coarse aggregate, wherein the preparation method of the recycled coarse aggregate by a raw word Anxian county structure formed by the sizing machine, the powdering machine and the conveying belt is as follows:
sp1, preparing ingredients and equipment, wherein the ingredients and the equipment are prepared by sequentially cleaning a sizing machine, a powdering machine and a conveying belt, connecting, and preparing quantitative recycled coarse aggregate, sodium silicate aqueous solution, fly ash, slag powder and phosphorus slag powder for later use;
sp2: the preparation of slurry, namely, sequentially mixing fly ash, slag powder and phosphorous slag powder to form slurry by taking sodium silicate aqueous solution as an exciting agent;
sp3: spraying slurry, wherein the spraying slurry is recycled coarse aggregate and is placed in a sizing machine, and the slurry in the step Sp1 is uniformly sprayed on the surface of the recycled coarse aggregate;
sp4: the method comprises the steps of adhering fibers, wherein the adhering fibers are formed by conveying regenerated coarse aggregate with slurry attached to the surface in the step Sp2 to a powder feeding machine through a conveying belt, placing the fibers in the powder feeding machine, and adhering the regenerated coarse aggregate to the fibers through the powder feeding machine;
sp5: the secondary spraying slurry is prepared by proportioning fly ash, slag powder, phosphorus slag powder and sodium silicate into slurry, and conveying the regenerated coarse aggregate of the bonding fibers in the step Sp3 to a sizing machine through a conveying belt to uniformly spray the slurry;
sp6: and (3) air-drying and discharging, wherein the air-drying and discharging is to air-dry the surface of the recycled coarse aggregate subjected to slurry spraying in the step Sp4 to form a film, so as to finish the preparation of the recycled coarse aggregate.
Preferably, the mass ratio of each component in the slurry preparation is 30% -45% of fly ash, 15% -25% of slag powder, 10% -20% of phosphorus slag powder and 25% -35% of sodium silicate aqueous solution.
Preferably, the modulus of the aqueous solution of sodium silicate in the slurry preparation and the secondary spraying slurry is 3.1-3.4, the content of sodium oxide is more than 8.2%, the content of silicon dioxide is more than 26%, and the content of insoluble matters in water is less than 0.4%.
Preferably, the slurry preparation and the secondary spraying slurry wrapping are carried out by sequentially adding materials into a vertical shaft planetary stirrer and stirring to form slurry.
Preferably, the mass ratio of each component in the slurry formed by the secondary spraying slurry is 20% -35% of fly ash, 20% -30% of slag powder, 10% -20% of phosphorus slag powder and 30% -40% of sodium silicate aqueous solution.
Preferably, the recycled coarse aggregate sequentially passes through a sizing machine, a powdering machine and a sizing machine, the sizing machine and the powdering machine are transmitted through a conveying belt, and the running speed of the conveying belt is 10m/min.
Preferably, the fiber used for the bonding fiber is polypropylene fiber, the fiber diameter is 0.1mm-0.2mm, the fiber length is 10mm-20mm, the linear density is 2.4dtex-2.6dtex, and the elongation rate is 16% -18%.
Advantageous effects
The application provides a preparation method of coconut shell bionic reinforced recycled coarse aggregate. The beneficial effects are as follows:
1. the application adopts the processes of spraying and wrapping slurry, bonding fiber and secondarily spraying and wrapping slurry to form the coconut shell bionic structure, so that the strength of the recycled coarse aggregate can be improved, the water absorption rate of the recycled coarse aggregate is reduced, the inherent defect of the recycled coarse aggregate is overcome, and the large-scale application of the recycled coarse aggregate is promoted.
2. The application adopts common industrial solid wastes such as fly ash, slag powder, phosphorus slag powder and the like and the exciting agent to prepare the slurry for strengthening the recycled coarse aggregate, and the method not only promotes the consumption of the common industrial solid wastes, but also improves the performance of the recycled coarse aggregate and reduces the strengthening treatment cost of the recycled coarse aggregate. The rapid coagulation characteristic of the alkali-activated material improves the strengthening treatment efficiency of the recycled coarse aggregate, and the treated aggregate can be used for production.
Drawings
FIG. 1 is a diagram of a preparation method of the present application;
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
First embodiment:
as shown in fig. 1, the preparation method of the coconut shell bionic reinforced recycled coarse aggregate comprises a sizing machine, a powdering machine, a conveying belt and the recycled coarse aggregate, wherein the preparation method of the recycled coarse aggregate by a raw word Anxian county structure formed by the sizing machine, the powdering machine and the conveying belt is as follows:
sp1, preparing ingredients and equipment, wherein the ingredients and the equipment are prepared by sequentially cleaning a sizing machine, a powdering machine and a conveying belt, connecting, and preparing quantitative recycled coarse aggregate, sodium silicate aqueous solution, fly ash, slag powder and phosphorus slag powder for later use;
sp2: preparing slurry, namely sequentially mixing fly ash, slag powder and phosphorous slag powder to form slurry by taking sodium silicate aqueous solution as an exciting agent;
sp3: spraying slurry, wherein the sprayed slurry is recycled coarse aggregate and is placed in a sizing machine, and the slurry in the step Sp1 is uniformly sprayed on the surface of the recycled coarse aggregate;
sp4: the fiber is bound, wherein the bound fiber is formed by conveying the regenerated coarse aggregate with slurry attached on the surface in the step Sp2 to a powder feeding machine through a conveying belt, placing the fiber in the powder feeding machine, and binding the fiber by the regenerated coarse aggregate through the powder feeding machine;
sp5: the secondary spraying slurry is prepared by proportioning fly ash, slag powder, phosphorus slag powder and sodium silicate into slurry, and conveying the regenerated coarse aggregate of the bonding fibers in the step Sp3 to a sizing machine through a conveying belt to uniformly spray the newly prepared slurry;
sp6: and (3) air-drying and discharging, namely performing surface air-drying and film-forming on the recycled coarse aggregate subjected to slurry spraying in the step Sp4 to finish the preparation of the recycled coarse aggregate.
Specific embodiment II:
as shown in figure 1, the mass ratio of each component in the slurry preparation is 30% -45% of fly ash, 15% -25% of slag powder, 10% -20% of phosphorus slag powder, 25% -35% of sodium silicate aqueous solution, 20% -30% of slag powder, 10% -20% of phosphorus slag powder and 30% -40% of sodium silicate aqueous solution, and the preparation of the slurry in the slurry preparation and the slurry preparation can be completed in step Sp2, so that the simultaneous proportioning of the two slurries is realized, the slurry proportioning for slurry preparation can be carried out firstly according to the requirements, and then the slurry proportioning of the slurry preparation for secondary slurry preparation can be carried out sequentially according to the actual use requirements and the operability.
Third embodiment:
as shown in figure 1, in order to facilitate the control of the slurry on the surface of the recycled coarse aggregate and the improvement of the finished product performance, the following restrictions are made on industrial waste materials used for the slurry, wherein the modulus of the aqueous solution of sodium silicate in the slurry preparation and secondary spraying and wrapping is 3.1-3.4, the content of sodium oxide is more than 8.2%, the content of silicon dioxide is more than 26%, the content of insoluble matters in water is less than 0.4%, and the slurry preparation and secondary spraying and wrapping are carried out by sequentially adding materials into a vertical shaft planetary stirrer for stirring to form the slurry.
The phosphorus slag powder is powder with certain fineness prepared by grinding the main phosphorus slag of a granulating electric furnace and a small amount of gypsum; the main component comprises SiO 2 、P 2 O 5 、Al 2 O 3 CaO, mgO, A l of 2 O 3 Sum of mass fractions of CaO and MgO and SiO 2 、P 2 O 5 The ratio of the sum of the mass fractions of the P2O5 is larger than 1.1, the mass fraction of the P2O5 is smaller than or equal to 3.4%, and the 28d activity index is larger than 75%.
The slag powder is powder with certain fineness prepared by taking granulated blast furnace slag as a main raw material and adding a small amount of gypsum and grinding; the main component comprises Al 2 O 3 、CaO、MgO、S i O 2 、T i O 2 MnO, where Al 2 O 3 Sum of mass fractions of CaO and MgO and SiO 2 、T iO 2 The ratio of the sum of mass fractions of MnO is more than 1.2%, the content of MnO is less than 2.3%, and the 28d activity index is more than 80%.
Fly ash is powder collected in flue gas of a pulverized coal furnace of a power plant, and can be F-type and C-type. The fineness is less than 25%, the water-required ratio is less than 105%, the loss on ignition is less than 8%, and the sulfur trioxide content is less than 3%.
The fiber used for the bonding fiber is polypropylene fiber, the fiber diameter is 0.1mm-0.2mm, the fiber length is 10mm-20mm, the linear density is 2.4dtex-2.6dtex, and the elongation rate is 16% -18%.
Fourth embodiment:
as shown in fig. 1, the recycled coarse aggregate sequentially passes through a sizing machine, a powdering machine and a sizing machine, the sizing machine and the powdering machine are transmitted through a conveying belt, the running speed of the conveying belt is 10m/min, and in order to facilitate the stable running of the whole device, the sizing machine, the powdering machine and the conveying belt are selected to be one component part in an XKJ600 production line, wherein the product model number of the product is produced by the existing Bokang company, and the whole production line comprises three working procedures of the sizing machine, the powdering machine and the sizing machine.
Fifth embodiment:
as shown in FIG. 1, the crushing value and the water absorption of the recycled coarse aggregate produced by the method of the application are compared with those of the front and rear parts shown in Table 1, and it is understood that the water absorption and the crushing value of the coconut shell bionic type reinforced recycled coarse aggregate produced by the method of the application are greatly reduced,
| aggregate type | Crush value/% | Water absorption/% |
| Recycled coarse aggregate | 15.6 | 3.2 |
| Coconut shell bionic reinforced recycled coarse aggregate | 6.2 | 1.6 |
TABLE 1
The mixture is treated by common recycled coarse aggregate and coconut shell bionic recycled coarse aggregate strengthening technology and is respectively used for preparing C30 and C60 concrete, and the concrete is prepared according to the proportion shown in Table 2
TABLE 2
The test data of compressive strength, expansion degree of the machine, and slump barrel time of the common recycled coarse aggregate and the bionic recycled coarse aggregate using coconut shells are shown in Table 3.
TABLE 3 Table 3
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The preparation method of the coconut shell bionic reinforced recycled coarse aggregate comprises a sizing machine, a powdering machine, a conveying belt and the recycled coarse aggregate, and is characterized in that: the preparation method of the recycled coarse aggregate by the raw word Anxian county structure consisting of the sizing machine, the powdering machine and the conveyer belt is as follows:
sp1, preparing ingredients and equipment, wherein the ingredients and the equipment are prepared by sequentially cleaning a sizing machine, a powdering machine and a conveying belt, connecting, and preparing quantitative recycled coarse aggregate, sodium silicate aqueous solution, fly ash, slag powder and phosphorus slag powder for later use;
sp2: the preparation of slurry, namely, sequentially mixing fly ash, slag powder and phosphorous slag powder to form slurry by taking sodium silicate aqueous solution as an exciting agent;
sp3: spraying slurry, wherein the spraying slurry is recycled coarse aggregate and is placed in a sizing machine, and the slurry in the step Sp1 is uniformly sprayed on the surface of the recycled coarse aggregate;
sp4: the method comprises the steps of adhering fibers, wherein the adhering fibers are formed by conveying regenerated coarse aggregate with slurry attached to the surface in the step Sp2 to a powder feeding machine through a conveying belt, placing the fibers in the powder feeding machine, and adhering the regenerated coarse aggregate to the fibers through the powder feeding machine;
sp5: the secondary spraying slurry is prepared by proportioning fly ash, slag powder, phosphorus slag powder and sodium silicate into slurry, and conveying the regenerated coarse aggregate of the bonding fibers in the step Sp3 to a sizing machine through a conveying belt to uniformly spray the slurry;
sp6: and (3) air-drying and discharging, wherein the air-drying and discharging is to air-dry the surface of the recycled coarse aggregate subjected to slurry spraying in the step Sp4 to form a film, so as to finish the preparation of the recycled coarse aggregate.
2. The method for preparing the coconut shell bionic type reinforced recycled coarse aggregate, which is characterized by comprising the following steps of: the mass ratio of each component in the slurry is 30-45% of fly ash, 15-25% of slag powder, 10-20% of phosphorus slag powder and 25-35% of sodium silicate aqueous solution.
3. The method for preparing the coconut shell bionic type reinforced recycled coarse aggregate, which is characterized by comprising the following steps of: the modulus of the sodium silicate aqueous solution in the slurry preparation and the secondary spraying slurry is 3.1-3.4, the sodium oxide content is more than 8.2%, the silicon dioxide content is more than 26%, and the insoluble matters in water are less than 0.4%.
4. The method for preparing the coconut shell bionic type reinforced recycled coarse aggregate, which is characterized by comprising the following steps of: the slurry preparation and the secondary spraying slurry wrapping are carried out by sequentially putting materials into a vertical shaft planetary stirrer for stirring to form slurry.
5. The method for preparing the coconut shell bionic type reinforced recycled coarse aggregate, which is characterized by comprising the following steps of: the mass ratio of each component in the slurry formed by the secondary spraying slurry is 20-35% of fly ash, 20-30% of slag powder, 10-20% of phosphorus slag powder and 30-40% of sodium silicate aqueous solution.
6. The method for preparing the coconut shell bionic type reinforced recycled coarse aggregate, which is characterized by comprising the following steps of: the regenerated coarse aggregate sequentially passes through a sizing machine, a powdering machine and a sizing machine, the sizing machine and the powdering machine are transmitted through a conveying belt, and the running speed of the conveying belt is 10m/min.
7. The method for preparing the coconut shell bionic type reinforced recycled coarse aggregate, which is characterized by comprising the following steps of: the fiber used by the bonding fiber is polypropylene fiber, the fiber diameter is 0.1mm-0.2mm, the fiber length is 10mm-20mm, the linear density is 2.4dtex-2.6dtex, and the elongation rate is 16% -18%.
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| CN202311004986.5A CN116969706A (en) | 2023-08-10 | 2023-08-10 | Preparation method of coconut shell bionic type reinforced recycled coarse aggregate |
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2023
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