CN114380523A - Preparation method of recycled aggregate applied to laminated slab - Google Patents
Preparation method of recycled aggregate applied to laminated slab Download PDFInfo
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- CN114380523A CN114380523A CN202111615085.0A CN202111615085A CN114380523A CN 114380523 A CN114380523 A CN 114380523A CN 202111615085 A CN202111615085 A CN 202111615085A CN 114380523 A CN114380523 A CN 114380523A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000002699 waste material Substances 0.000 claims abstract description 79
- 239000000945 filler Substances 0.000 claims abstract description 70
- 239000002245 particle Substances 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000002156 mixing Methods 0.000 claims abstract description 41
- 239000004927 clay Substances 0.000 claims abstract description 39
- 238000012216 screening Methods 0.000 claims abstract description 36
- 239000011449 brick Substances 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 24
- 238000002791 soaking Methods 0.000 claims abstract description 20
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000011863 silicon-based powder Substances 0.000 claims abstract description 7
- 238000010304 firing Methods 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 25
- 230000000996 additive effect Effects 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 20
- 239000002253 acid Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000004088 foaming agent Substances 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000011068 loading method Methods 0.000 claims description 5
- 239000004570 mortar (masonry) Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 238000005469 granulation Methods 0.000 claims 1
- 230000003179 granulation Effects 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 239000002817 coal dust Substances 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000009736 wetting Methods 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000008595 infiltration Effects 0.000 description 5
- 238000001764 infiltration Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002912 waste gas Substances 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
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- 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
- 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
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a preparation method of recycled aggregate applied to laminated slabs, belonging to the technical field of recycled aggregate, and specifically comprising the following steps: s1, collecting raw materials; s2, cleaning the raw materials; s3, grinding the raw materials; s4, screening the raw materials; s5, preparing filler particles; s6, soaking filler particles; and S7, mixing materials. According to the invention, the addition control capacity of the water reducing agent during preparation of the laminated slab can be improved by adjusting the wetting particles, the coal dust and the silicon powder of the wetting particles can fill the pores of the recycled aggregate, the physical impact resistance of the recycled aggregate after preparation is improved, meanwhile, the clay brick waste is added into the concrete waste, the bonding capacity and the impact strength of the recycled particles are realized through the clay waste, the regulation and control requirements of additives in large-scale production are effectively improved, the slow-release water reducing agent ensures slow precipitation in the production process of the laminated slab slurry, and the mixing control requirements of raw material water liquid are improved.
Description
Technical Field
The invention belongs to the technical field of recycled aggregate, and particularly relates to a preparation method of recycled aggregate applied to laminated slabs.
Background
The waste concrete refers to waste concrete blocks generated in the process of removing a large number of buildings, maintaining roads, producing and manufacturing concrete or other construction conditions, the waste concrete is subjected to a series of treatment processes, and final aggregate blended according to a proper proportion is called recycled aggregate, the apparent density and the volume density of the recycled aggregate are far smaller than those of natural aggregate, the water absorption speed is high, the dispersion degree is high, the recycled aggregate is used for replacing the natural aggregate to prepare the concrete, a large number of natural high-quality aggregates can be effectively saved, the investment project cost is reduced, and the economic benefit is high.
In the prior art, the crushing treatment precision of waste gas concrete is low, the precision of subsequent adjustment is influenced, the adjusted recycled aggregate is lack of certain flowability, meanwhile, the recycled aggregate has high water absorption during preparation, and the physical property of the interlocking of the laminated slab needs to be realized by matching with a water reducing agent.
Disclosure of Invention
The invention aims to: the preparation method is provided for solving the problems that the recycled aggregate has high water absorption during preparation, and the physical property of the engagement of the laminated slab is realized by matching with the water reducing agent, but the water absorption is insufficient due to the matching of the water reducing agent and the recycled aggregate is influenced by the matching of the traditional water reducing agent during preparation of the laminated slab.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method for recycled aggregate applied to laminated slabs specifically comprises the following steps:
s1, collecting raw materials, collecting concrete waste and clay brick waste, primarily crushing the concrete waste and the clay waste by a movable crawler-type crusher, and loading the crushed concrete waste and the clay brick waste for transferring;
s2, cleaning raw materials, cleaning the crushed concrete waste and clay brick waste through crushing, pre-soaking the crushed concrete waste and clay brick waste by using water, washing the recycled coarse aggregate, separating impurity mud blocks and stone powder in the recycled aggregate, improving the quality of the recycled aggregate, performing surface drying in an environment with the temperature of 23 ℃ and the humidity of 56% after impact is finished, and performing standing and drying treatment on the concrete waste and the clay brick waste;
s3, grinding the raw materials, namely, fully mixing the concrete waste and the clay brick waste by adopting a concrete mixer so as to enable mortar with lower surface strength of the aggregate to fall off, wherein the total stirring time is 20min, the mixing is carried out by 10 times, each stirring lasts for 2min, and the ball-free self-falling grinding is carried out on the obtained regenerated aggregate particles by adopting a ball mill;
s4, screening the raw materials by a screening machine to obtain aggregate grading, passing the stirred aggregate through a screening machine, wherein the oversize part is the treated recycled aggregate, and reserving the recycled aggregate for later use;
s5, preparing filler particles, namely, sieving the fly ash and the silicon powder raw materials, adding an adhesive and a foaming agent, preparing the filler particles by a wet granulator, firing the foaming agent in the dried filler particles to obtain microporous filler particles, and sieving the microporous filler particles to obtain microporous filler particles with different particle sizes;
s6, soaking filler particles, namely soaking the classified filler particles after screening into additive slurry, heating the additive slurry to 50-60 ℃, fully stirring and mixing for 20min by stirring, taking out the soaked filler, standing, airing and assembling to obtain the soaked filler, and reserving the soaked filler to be prepared into recycled aggregate concrete;
and S7, mixing materials, mixing the prepared infiltrating filler into the graded recycled aggregate, and fully mixing the infiltrating filler and the graded recycled aggregate after nitrogen protection to obtain the modified recycled aggregate.
As a further description of the above technical solution:
the grinding time in the S3 is respectively selected from 2min, 5min and 10 min.
As a further description of the above technical solution:
the screening precision of the screening machine in the S4 is respectively 0-5mm, 5-10mm and 10-30mm, and the screen holes of the screening machine are square hole screens.
As a further description of the above technical solution:
the firing and drying in the step S5 specifically comprises the steps of standing, ventilating and drying the granulated recycled aggregate, and placing the dried recycled aggregate into a firing furnace for firing, wherein the firing time is 20min, and the firing temperature is 150-200 ℃.
As a further description of the above technical solution:
the S6 additive slurry comprises VAE emulsion and polycarboxylic acid slow-release water reducing agent, and the ratio of the VAE emulsion to the polycarboxylic acid slow-release water reducing agent is 1-3: 1.5-4.5.
As a further description of the above technical solution:
and the preparation of additive slurry is also included, the VAE emulsion is placed into a stirring kettle, the polycarboxylic acid slow-release water reducing agent is slowly added for full mixing, and after the polycarboxylic acid slow-release water reducing agent is added, standing and defoaming are carried out to prepare soaking slurry.
As a further description of the above technical solution:
the method also comprises a method for preparing the laminated slab by using the recycled aggregate, and specifically comprises the steps of mixing the prepared infiltrating microporous filler particles with the recycled aggregate, adding binding water into the modified recycled aggregate, performing mould casting according to the specification of the obtained laminated slab, inserting corresponding configured reinforcing steel bars after casting, and performing surface maintenance after the laminated slab is cured.
As a further description of the above technical solution:
and the surface maintenance of the laminated plate is carried out by spraying maintenance water after covering the moisturizing film.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, through the matching of the infiltration particles and the recycled aggregate, in the water hydration process, the polycarboxylic acid slow-release water reducing agent in the infiltration particles reacts with the recycled aggregate to reduce the water absorption capacity of the polycarboxylic acid slow-release water reducing agent, so that the addition control capacity of the water reducing agent can be improved by adjusting the infiltration particles during the preparation of the laminated slab, the coal dust and the silicon powder of the infiltration particles can fill the pores of the recycled aggregate, the physical impact resistance of the recycled aggregate after the preparation is improved, meanwhile, the bonding capacity and the impact strength of the recycled particles are realized through the clay waste by adding the clay brick waste into the concrete waste, the additive regulation and control requirement of large-scale production is effectively improved, the slow-release water reducing agent ensures slow precipitation in the production process of the laminated slab slurry, and the mixing control requirement of raw material water liquid is improved.
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
The invention provides a technical scheme that: a preparation method for recycled aggregate applied to laminated slabs specifically comprises the following steps:
s1, collecting raw materials, collecting concrete waste and clay brick waste, primarily crushing the concrete waste and the clay waste by a movable crawler-type crusher, and loading the crushed concrete waste and the clay brick waste for transferring;
s2, cleaning raw materials, cleaning the crushed concrete waste and clay brick waste through crushing, pre-soaking the crushed concrete waste and clay brick waste by using water, washing the recycled coarse aggregate, separating impurity mud blocks and stone powder in the recycled aggregate, improving the quality of the recycled aggregate, performing surface drying in an environment with the temperature of 23 ℃ and the humidity of 56% after impact is finished, and performing standing and drying treatment on the concrete waste and the clay brick waste;
s3, grinding the raw materials, namely, fully mixing the concrete waste and the clay brick waste by adopting a concrete mixer so as to enable mortar with lower surface strength of the aggregate to fall off, wherein the total stirring time is 20min, the mixing is carried out by 10 times, each stirring lasts for 2min, and the ball-free self-falling grinding is carried out on the obtained regenerated aggregate particles by adopting a ball mill;
s4, screening the raw materials by a screening machine to obtain aggregate grading, passing the stirred aggregate through a screening machine, wherein the oversize part is the treated recycled aggregate, and reserving the recycled aggregate for later use;
s5, preparing filler particles, namely, sieving the fly ash and the silicon powder raw materials, adding an adhesive and a foaming agent, preparing the filler particles by a wet granulator, firing the foaming agent in the dried filler particles to obtain microporous filler particles, and sieving the microporous filler particles to obtain microporous filler particles with different particle sizes;
s6, soaking filler particles, namely soaking the classified filler particles after screening into additive slurry, heating the additive slurry to 50-60 ℃, fully stirring and mixing for 20min by stirring, taking out the soaked filler, standing, airing and assembling to obtain the soaked filler, and reserving the soaked filler to be prepared into recycled aggregate concrete;
and S7, mixing materials, mixing the prepared infiltrating filler into the graded recycled aggregate, and fully mixing the infiltrating filler and the graded recycled aggregate after nitrogen protection to obtain the modified recycled aggregate.
The grinding time in S3 is 2min, the screening precision of the screening machine in S4 is 0-5mm, 5-10mm and 10-30mm respectively, the screening machine mesh is a square-hole screen, the firing and drying in S5 specifically comprises the steps of standing, ventilating and drying the granulated recycled aggregate, placing the dried recycled aggregate into a firing furnace for firing, the firing time is 20min, the firing temperature is 150 ℃, and the additive slurry in S6 comprises VAE emulsion and polycarboxylic acid slow-release water reducer, and the ratio is 1: 1.5.
The implementation mode is specifically as follows: the polycarboxylic acid slow-release water reducing agent in the embodiment has excellent slump retaining performance and adaptability to materials and temperature, can effectively reduce the slump loss of concrete, improves the workability of the concrete, is suitable for preparing large-volume concrete and concrete doped with fly ash and silica powder, and improves the proportioning mixing type of fillers.
Example 2
Different from embodiment 1, this embodiment further provides a technical solution: a preparation method for recycled aggregate applied to laminated slabs specifically comprises the following steps:
s1, collecting raw materials, collecting concrete waste and clay brick waste, primarily crushing the concrete waste and the clay waste by a movable crawler-type crusher, and loading the crushed concrete waste and the clay brick waste for transferring;
s2, cleaning raw materials, cleaning the crushed concrete waste and clay brick waste through crushing, pre-soaking the crushed concrete waste and clay brick waste by using water, washing the recycled coarse aggregate, separating impurity mud blocks and stone powder in the recycled aggregate, improving the quality of the recycled aggregate, performing surface drying in an environment with the temperature of 23 ℃ and the humidity of 56% after impact is finished, and performing standing and drying treatment on the concrete waste and the clay brick waste;
s3, grinding the raw materials, namely, fully mixing the concrete waste and the clay brick waste by adopting a concrete mixer so as to enable mortar with lower surface strength of the aggregate to fall off, wherein the total stirring time is 20min, the mixing is carried out by 10 times, each stirring lasts for 2min, and the ball-free self-falling grinding is carried out on the obtained regenerated aggregate particles by adopting a ball mill;
s4, screening the raw materials by a screening machine to obtain aggregate grading, passing the stirred aggregate through a screening machine, wherein the oversize part is the treated recycled aggregate, and reserving the recycled aggregate for later use;
s5, preparing filler particles, namely, sieving the fly ash and the silicon powder raw materials, adding an adhesive and a foaming agent, preparing the filler particles by a wet granulator, firing the foaming agent in the dried filler particles to obtain microporous filler particles, and sieving the microporous filler particles to obtain microporous filler particles with different particle sizes;
s6, soaking filler particles, namely soaking the classified filler particles after screening into additive slurry, heating the additive slurry to 50-60 ℃, fully stirring and mixing for 20min by stirring, taking out the soaked filler, standing, airing and assembling to obtain the soaked filler, and reserving the soaked filler to be prepared into recycled aggregate concrete;
and S7, mixing materials, mixing the prepared infiltrating filler into the graded recycled aggregate, and fully mixing the infiltrating filler and the graded recycled aggregate after nitrogen protection to obtain the modified recycled aggregate.
The grinding time in S3 is 2min, the screening precision of the screening machine in S4 is 0-5mm, 5-10mm and 10-30mm respectively, the screening machine meshes are square-hole screens, the firing and drying in S5 specifically comprises the steps of standing, ventilating and drying the granulated and regenerated aggregate, placing the dried and regenerated aggregate into a firing furnace for firing, the firing time is 20min, the firing temperature is 180 ℃, the additive slurry in S6 comprises VAE emulsion and polycarboxylic acid slow-release water reducing agent, the ratio is 2: 2.5, the preparation of the additive slurry also comprises the steps of placing the VAE emulsion into a stirring kettle, fully mixing the additive slurry by slowly adding the polycarboxylic acid slow-release water reducing agent, and standing and defoaming the slurry after the polycarboxylic acid slow-release water reducing agent is added.
The implementation mode is specifically as follows: this embodiment section of thick bamboo through fully stirring and the slow mixing of polycarboxylic acid slow release water-reducing agent to the VAE emulsion, improves the intensive mixing ability of additive to after static defoaming, improve the abundant infiltration of soaking thick liquid and micropore granule and mix, guarantee to soak the thick liquid and can mix in the micropore granule.
Example 3
Different from embodiment 1, this embodiment further provides a technical solution: a preparation method for recycled aggregate applied to laminated slabs specifically comprises the following steps:
s1, collecting raw materials, collecting concrete waste and clay brick waste, primarily crushing the concrete waste and the clay waste by a movable crawler-type crusher, and loading the crushed concrete waste and the clay brick waste for transferring;
s2, cleaning raw materials, cleaning the crushed concrete waste and clay brick waste through crushing, pre-soaking the crushed concrete waste and clay brick waste by using water, washing the recycled coarse aggregate, separating impurity mud blocks and stone powder in the recycled aggregate, improving the quality of the recycled aggregate, performing surface drying in an environment with the temperature of 23 ℃ and the humidity of 56% after impact is finished, and performing standing and drying treatment on the concrete waste and the clay brick waste;
s3, grinding the raw materials, namely, fully mixing the concrete waste and the clay brick waste by adopting a concrete mixer so as to enable mortar with lower surface strength of the aggregate to fall off, wherein the total stirring time is 20min, the mixing is carried out by 10 times, each stirring lasts for 2min, and the ball-free self-falling grinding is carried out on the obtained regenerated aggregate particles by adopting a ball mill;
s4, screening the raw materials by a screening machine to obtain aggregate grading, passing the stirred aggregate through a screening machine, wherein the oversize part is the treated recycled aggregate, and reserving the recycled aggregate for later use;
s5, preparing filler particles, namely, sieving the fly ash and the silicon powder raw materials, adding an adhesive and a foaming agent, preparing the filler particles by a wet granulator, firing the foaming agent in the dried filler particles to obtain microporous filler particles, and sieving the microporous filler particles to obtain microporous filler particles with different particle sizes;
s6, soaking filler particles, namely soaking the classified filler particles after screening into additive slurry, heating the additive slurry to 50-60 ℃, fully stirring and mixing for 20min by stirring, taking out the soaked filler, standing, airing and assembling to obtain the soaked filler, and reserving the soaked filler to be prepared into recycled aggregate concrete;
and S7, mixing materials, mixing the prepared infiltrating filler into the graded recycled aggregate, and fully mixing the infiltrating filler and the graded recycled aggregate after nitrogen protection to obtain the modified recycled aggregate.
The grinding time in S3 is 2min, the screening precision of the screening machine in S4 is 0-5mm, 5-10mm and 10-30mm respectively, the screening machine mesh is a square-hole screen, the firing and drying in S5 specifically comprises the steps of standing, ventilating and drying the granulated and regenerated aggregate, placing the dried and dried regenerated aggregate into a firing furnace for firing, the firing time is 20min, the firing temperature is 200 ℃, the additive slurry in S6 comprises VAE emulsion and polycarboxylic acid slow-release water reducing agent, the ratio is 3: 4.5, the preparation of the additive slurry also comprises the steps of placing the VAE emulsion into a stirring kettle, fully mixing the additive slurry by slowly adding the polycarboxylic acid slow-release water reducing agent, preparing soaking slurry after standing and defoaming the slurry after adding the polycarboxylic acid slow-release water reducing agent, and the surface of the laminated slab is cured by spraying curing water after covering a moisture retention film.
The implementation mode is specifically as follows: in this embodiment, the laminated board after preparation is covered with the moisture retention film to carry out surface covering maintenance, so that the maintenance effect on the surface of the laminated board can be effectively improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The preparation method of the recycled aggregate applied to the laminated slab is characterized by comprising the following steps:
s1, collecting raw materials, collecting concrete waste and clay brick waste, primarily crushing the concrete waste and the clay waste by a movable crawler-type crusher, and loading the crushed concrete waste and the clay brick waste for transferring;
s2, cleaning raw materials, cleaning the crushed concrete waste and clay brick waste through crushing, pre-soaking the crushed concrete waste and clay brick waste by using water, washing the recycled coarse aggregate, separating impurity mud blocks and stone powder in the recycled aggregate, improving the quality of the recycled aggregate, performing surface drying in an environment with the temperature of 23 ℃ and the humidity of 56% after impact is finished, and performing standing and drying treatment on the concrete waste and the clay brick waste;
s3, grinding the raw materials, namely, fully mixing the concrete waste and the clay brick waste by adopting a concrete mixer so as to enable mortar with lower surface strength of the aggregate to fall off, wherein the total stirring time is 20min, the mixing is carried out by 10 times, each stirring lasts for 2min, and the ball-free self-falling grinding is carried out on the obtained regenerated aggregate particles by adopting a ball mill;
s4, screening the raw materials by a screening machine to obtain aggregate grading, passing the stirred aggregate through a screening machine, wherein the oversize part is the treated recycled aggregate, and reserving the recycled aggregate for later use;
s5, preparing filler particles, namely, sieving the fly ash and the silicon powder raw materials, adding an adhesive and a foaming agent, preparing the filler particles by a wet granulator, firing the foaming agent in the dried filler particles to obtain microporous filler particles, and sieving the microporous filler particles to obtain microporous filler particles with different particle sizes;
s6, soaking filler particles, namely soaking the classified filler particles after screening into additive slurry, heating the additive slurry to 50-60 ℃, fully stirring and mixing for 20min by stirring, taking out the soaked filler, standing, airing and assembling to obtain the soaked filler, and reserving the soaked filler to be prepared into recycled aggregate concrete;
and S7, mixing materials, mixing the prepared infiltrating filler into the graded recycled aggregate, and fully mixing the infiltrating filler and the graded recycled aggregate after nitrogen protection to obtain the modified recycled aggregate.
2. The method for preparing recycled aggregate for laminated slabs according to claim 1, wherein the grinding time in S3 is selected from 2min, 5min and 10 min.
3. The method for preparing recycled aggregate for laminated slabs according to claim 1, wherein the screening precision of the screening machine in S4 is 0-5mm, 5-10mm and 10-30mm, and the screen hole of the screening machine is a square hole screen.
4. The method as claimed in claim 1, wherein the firing and drying step S5 includes standing and drying the recycled aggregate after granulation, and firing the recycled aggregate in a firing furnace for 20min at a temperature of 150-.
5. The preparation method of recycled aggregate for laminated slabs according to claim 1, wherein the additive slurry in S6 comprises VAE emulsion and polycarboxylic acid slow-release water reducing agent, and the ratio is 1-3: 1.5-4.5.
6. The method for preparing recycled aggregate for laminated slabs as claimed in claim 5, further comprising preparing slurry of additives, placing VAE emulsion into a stirring kettle, adding the polycarboxylic acid slow-release water reducing agent slowly for thorough mixing, and standing for defoaming after the polycarboxylic acid slow-release water reducing agent is added to obtain soaking slurry.
7. The method for preparing recycled aggregate for laminated slabs according to claim 1, further comprising a method for preparing a laminated slab by using recycled aggregate, wherein the prepared infiltrated microporous filler particles are mixed with the recycled aggregate, the modified recycled aggregate is added with binding water, the obtained laminated slab is subjected to mold casting according to the specification, corresponding configuration steel bars are inserted after the mold casting, and the surface maintenance is performed after the laminated slab is cured.
8. The method for preparing recycled aggregate for laminated slabs as claimed in claim 7, wherein the surface curing of the laminated slab is performed by spraying curing water after covering a moisture-preserving film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111615085.0A CN114380523A (en) | 2021-12-27 | 2021-12-27 | Preparation method of recycled aggregate applied to laminated slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111615085.0A CN114380523A (en) | 2021-12-27 | 2021-12-27 | Preparation method of recycled aggregate applied to laminated slab |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006111523A (en) * | 2004-09-15 | 2006-04-27 | Shinozaki Kenzai Kk | Method for manufacturing regenerated aggregate |
| CN110357472A (en) * | 2019-08-13 | 2019-10-22 | 广东新瑞龙生态建材有限公司 | A kind of technique that building waste prepares regenerated coarse aggregate |
| CN111978056A (en) * | 2020-08-27 | 2020-11-24 | 中国建筑材料科学研究总院有限公司 | Modified material of low-quality aggregate and treatment method |
| CN112239332A (en) * | 2020-09-29 | 2021-01-19 | 江苏晨马建筑科技有限公司 | Preparation process of recycled concrete aggregate |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006111523A (en) * | 2004-09-15 | 2006-04-27 | Shinozaki Kenzai Kk | Method for manufacturing regenerated aggregate |
| CN110357472A (en) * | 2019-08-13 | 2019-10-22 | 广东新瑞龙生态建材有限公司 | A kind of technique that building waste prepares regenerated coarse aggregate |
| CN111978056A (en) * | 2020-08-27 | 2020-11-24 | 中国建筑材料科学研究总院有限公司 | Modified material of low-quality aggregate and treatment method |
| CN112239332A (en) * | 2020-09-29 | 2021-01-19 | 江苏晨马建筑科技有限公司 | Preparation process of recycled concrete aggregate |
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