CN113636822A - Improved construction waste roadbed filler using sintered brick micro powder as modifier and method - Google Patents
Improved construction waste roadbed filler using sintered brick micro powder as modifier and method Download PDFInfo
- Publication number
- CN113636822A CN113636822A CN202110813555.8A CN202110813555A CN113636822A CN 113636822 A CN113636822 A CN 113636822A CN 202110813555 A CN202110813555 A CN 202110813555A CN 113636822 A CN113636822 A CN 113636822A
- Authority
- CN
- China
- Prior art keywords
- micro powder
- construction waste
- sintered
- sintered brick
- brick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011449 brick Substances 0.000 title claims abstract description 172
- 239000000843 powder Substances 0.000 title claims abstract description 106
- 239000002699 waste material Substances 0.000 title claims abstract description 87
- 238000010276 construction Methods 0.000 title claims abstract description 75
- 239000000945 filler Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000003607 modifier Substances 0.000 title claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 36
- 238000011049 filling Methods 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 claims abstract description 33
- 238000002156 mixing Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002245 particle Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 230000003334 potential effect Effects 0.000 claims abstract description 7
- 239000011148 porous material Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 40
- 238000000227 grinding Methods 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000000126 substance Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 6
- 239000004566 building material Substances 0.000 abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 48
- 239000003623 enhancer Substances 0.000 description 13
- 239000002689 soil Substances 0.000 description 13
- 239000002002 slurry Substances 0.000 description 12
- 239000007832 Na2SO4 Substances 0.000 description 11
- 239000012190 activator Substances 0.000 description 11
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 11
- 229910001679 gibbsite Inorganic materials 0.000 description 11
- 239000011734 sodium Substances 0.000 description 11
- 229910052938 sodium sulfate Inorganic materials 0.000 description 11
- 229920005551 calcium lignosulfonate Polymers 0.000 description 10
- 239000004927 clay Substances 0.000 description 9
- 229910052911 sodium silicate Inorganic materials 0.000 description 9
- 229920000142 Sodium polycarboxylate Polymers 0.000 description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 8
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 239000004567 concrete Substances 0.000 description 6
- 230000002708 enhancing effect Effects 0.000 description 6
- 239000004570 mortar (masonry) Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000012744 reinforcing agent Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 229910020489 SiO3 Inorganic materials 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 239000002734 clay mineral Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000006253 efflorescence Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 239000004117 Lignosulphonate Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003674 animal food additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000019357 lignosulphonate Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- -1 shale Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
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
- 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
- C04B28/24—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 alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
-
- 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
- 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
- C04B18/165—Ceramic waste
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
-
- 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
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Road Paving Structures (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of construction waste recycling and building materials, in particular to an improved construction waste roadbed filler using sintered brick micro powder as a modifier and a method. The method comprises the steps of mixing the sintered brick micro powder, the building garbage filler, the cement and the excitant by adopting a manual mixing or mechanical mixing mode, and then adding water for stirring uniformly to obtain the improved roadbed filler. Filling the sintered brick micro powder into the pores of the construction waste roadbed filling; the sintered brick micro powder has a gelling effect after being excited to have potential activity by the exciting agent, path fillers with different particle sizes are cemented, the interface between the sintered brick micro powder and the construction waste roadbed filler is optimized, and the strength, compactness and water stability of the roadbed filler can be improved.
Description
Technical Field
The invention relates to the technical field of construction waste recycling and building materials, in particular to an improved construction waste roadbed filler using sintered brick micro powder as a modifier and a method.
Background
The harm of construction waste is eliminated, on one hand, reduction and harmlessness are realized, and on the other hand, resource utilization is also realized, at present, the resource utilization of the construction waste is mainly realized by using waste concrete in the construction waste as recycled aggregate concrete, recycled building blocks and the like, the resource utilization amount is small, and a large amount of sintered bricks, waste ceramic bricks, cement mortar powder slag and the like in the construction waste cannot be effectively utilized. On the other hand, a large amount of natural sandstone and soil materials are needed for road engineering to serve as roadbed fillers, and materials such as lime, cement and the like are used as binders and modification modifiers for the roadbed fillers, the natural sandstone and soil materials and the like are more and more difficult to obtain, the production limit of traditional high-energy-consumption and high-emission building materials such as lime cement and the like is stricter, and the engineering construction cost is greatly increased. Therefore, a way for resource utilization and consumption of a large amount of construction waste is found, and the method has important social significance and economic value for reducing the influence of the large amount of construction waste on the environment, solving the problem that the source of roadbed fillers is increasingly tense and reducing the damage of the production of sand, stone and soil materials to the ecology and the environment.
The construction waste reserves are large, and the recycling of the construction waste at present is mainly to screen the construction waste after crushing so as to obtain the construction recycled materials with different particle sizes. The recycled material obtained from the construction waste is mostly used for manufacturing recycled concrete, recycled mortar, bricks and the like, the consumption is small, the added value is low, the utilization rate is not high, and the potential activity in the construction waste is not fully utilized. Therefore, it is necessary to explore a new way for the construction waste to be recycled with high added value.
Some students mix the waste sintered brick powder to replace part of cement, and use the cement and the waste sintered brick powder respectivelyCa(OH)2The activity of the sintered bricks is excited by materials such as NaOH and the like, but the excitation effect is general, the doping amount of an exciting agent is too much, the phenomenon of efflorescence can occur after the products of the sintered bricks reach a certain age, the appearance and the material performance of a building are influenced, a formula proportioning method for enhancing the activity of the micro powder of the sintered bricks is selected, after the waste sintered bricks in the construction waste are ground, an activity enhancer is adopted to fully exert and enhance the potential activity of the waste sintered bricks, the waste sintered bricks are used for preparing the terrace roadbed filler and the concrete mortar, and the method has important significance for reducing the use of the traditional cement road base material with high energy consumption and high carbon dioxide emission and the high-efficiency high-value reutilization of the construction waste.
Definition of the sintered brick:
and (3) sintering the brick: the bricks for building load-bearing and non-load-bearing walls, which are prepared by using clay, shale, coal gangue or fly ash as raw materials through molding and high-temperature roasting, are collectively called as baked bricks. According to different raw materials, the brick is divided into a sintered clay brick, a sintered fly ash brick, a sintered shale brick and the like.
The baked brick used in the patent is a baked clay brick, and the raw material of the baked clay brick is mainly sticky ancient soil with two-foot depth under the earth surface, and also comprises fly ash, coal gangue, shale and the like.
The production process of the sintered clay brick comprises the following steps:
1. and (6) taking soil. The color of the ancient soil is slightly darker than that of the surface soil, and the ancient soil is formed eight ten thousand to twelve thousand years ago. At that time, the climate is warm and humid, and the rich biological action makes the soil formed in the period soft and sticky, and is suitable for firing tiles.
2. The clay is decomposed, loosened and pulverized. The clay is piled up in the open air for about half a year, is subjected to sun irradiation and rain and snow frost corrosion, is subjected to internal decomposition and loosening, and is subjected to hammer crushing and sieving to obtain fine pure soil.
3. Repeatedly refining pure soil. And (3) moistening the pure soil by adding water, and repeatedly refining for 5-6 times to obtain the thick mud. This process is critical to the quality of the resulting tile.
4. And (5) preparing an embryo. Filling the thick mud into a blank making mold, compacting, and scraping the excessive mud to obtain a blank shape.
5. And (6) demolding. And placing the demolded green bricks at a position with the sun back for drying in the shade to prevent the bricks from cracking and deforming by exposure to the sun.
6. And (4) firing. And drying the brick blank and then firing in a kiln to obtain the sintered clay brick.
The components of the sintered clay brick are as follows: the mineral composition is as follows: clay minerals (hydrous silicates), impurities (non-clay minerals and organics);
chemical components: mainly of SiO2、Al2O3And a small amount of Fe2O3。
Disclosure of Invention
The purpose of the invention is as follows: in order to provide an improved construction waste roadbed filling material using the sintered brick micro powder as a modifier with better effect, a method for preparing a sintered brick micro powder slurry capable of increasing dry density and an activity reinforcing agent, the concrete purpose is seen in a plurality of substantial technical effects of a concrete implementation part.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first scheme is as follows:
the improved construction waste roadbed filling material using the sintered brick micro powder as a modifier is characterized by comprising the following substances in parts by weight: 5-35 parts of sintered brick micro powder; 100 parts of building garbage filler.
The invention further adopts the technical scheme that the feed additive also comprises the following substances in parts by weight: na in excitant sample2The mass percentage of O in the sintered brick micro powder is 1-5%.
The invention further adopts the technical scheme that the improved construction waste roadbed filling material also comprises 1-3 parts by weight of cement.
The invention further adopts the technical scheme that the improved construction waste roadbed filling material also comprises 15-25 parts of water by weight.
The further technical proposal of the invention is that the particle size of the sintered brick micro powder is less than or equal to 300 mu m; the modulus of the excitant is 1.2-1.6.
A method for improving the construction waste roadbed filler by using sintered brick micro powder as a modifier is characterized by utilizing the filler, comprising the following steps:
(1) sorting: separating and sorting the baked bricks in the construction waste by adopting a manual or mechanical sorting mode;
(2) removing impurities: removing sundries such as iron nails, wood, glass, plastics, electric wires and the like in the sintered bricks;
(3) crushing: crushing the sintered bricks by using a crusher to obtain sintered brick materials with the particle size of less than 40 mm;
(4) grinding: grinding the sintered brick material with the grain size less than 40mm by using a grinding machine, and obtaining sintered brick micro powder with the grain size less than 300 mu m by vibration screening;
the method comprises the steps of mixing the sintered brick micro powder, the building garbage filler, the cement and the excitant by adopting a manual mixing or mechanical mixing mode, and then adding water for stirring uniformly to obtain the improved roadbed filler.
The invention further adopts the technical scheme that the sintered brick micro powder is filled in the pores of the construction waste roadbed filling; the sintered brick micro powder has a gelling effect after being excited to have potential activity by the exciting agent, path fillers with different particle sizes are cemented, the interface between the sintered brick micro powder and the construction waste roadbed filler is optimized, and the strength, compactness and water stability of the roadbed filler can be improved.
The use of the sintered brick micro powder as a modifier in the preparation of the modified construction waste roadbed filling material.
Scheme II:
1. an activity enhancer capable of increasing dry density and used for sintering brick micro powder in construction waste is characterized in that Na is added2SiO3、NaOH、Al(OH)3、Na2SO4Uniformly mixing calcium lignosulphonate and sodium polycarboxylate according to an optimal formula ratio; na (Na)2SiO3、NaOH、Al(OH)3、Na2SO4And the weight ratio of the calcium lignosulphonate is (3-5): (1-2): 1: 1: (0.5 to 1).
The preparation method of the sintered brick micro-powder slurry capable of increasing the dry density is characterized by comprising the following steps:
(1) preparing sintered brick micro powder:
separating and sorting the baked bricks in the construction waste by adopting a manual or mechanical sorting mode; removing sundries such as iron nails, glass, plastics, electric wires and the like in the sintered bricks; crushing the sintered bricks by using a crusher, grinding the crushed sintered brick materials by using a ball mill, and performing vibration screening to obtain sintered brick micro powder with the particle size of less than 100 um;
(2) preparation of activity enhancer:
mixing Na2SiO3、NaOH、Al(OH)3、Na2SO4Calcium lignosulphonate and sodium polycarboxylate according to the weight ratio of (3-5): (1-2): 1: 1: (0.5-1) mixing uniformly according to the formula proportion;
(3) preparing sintered brick micro powder slurry:
and mixing the sintered brick micro powder, the cement, the activity enhancer and the water according to the optimal formula proportion by adopting a manual mixing or mechanical mixing mode according to the relevant specifications to obtain sintered brick micro powder slurry.
The further technical scheme of the invention is that the weight parts of the sintered brick micro powder, the cement, the activity reinforcing agent and the water in the preparation of the sintered brick micro powder slurry are as follows: 100 parts of sintered brick micro powder, 1-3 parts of cement, 8-10 parts of activity enhancer and 15-25 parts of water.
The technical scheme is that the sodium polycarboxylate accounts for 0.3-0.5 part of the activity enhancer.
The further technical scheme of the invention is that the cement is portland cement.
The active reinforcing agent and the sintered brick micro powder are used for preventing the calcined brick from being efflorescent due to excessive mixing amount of the exciting agent.
Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: preparing the waste baked bricks into light powder materials with higher added values, and greatly enhancing the activity of the baked bricks by a proper amount of activity enhancer to obtain regenerated active admixtures meeting the actual requirements; meanwhile, the excessive addition of the exciting agent is avoided, so that the phenomena of saltpetering of the terrace roadbed filling and the mortar product after a certain age period can be avoided, and the material performance and the building (structure) attractiveness are not influenced.
The sintered brick micro powder is added into the construction waste roadbed filler, so that the filling effect of the sintered brick micro powder in the construction waste roadbed filler is exerted, the porosity of the construction waste roadbed filler is reduced, and the compactness of the construction waste roadbed filler is improved; meanwhile, the activator is added to excite the potential activity of the sintered brick micro powder, so that the sintered brick micro powder becomes a cementing material of the roadbed filling, and the strength and the water stability of the roadbed filling are further improved. The bearing capacity of the roadbed filling is mainly provided by the construction waste filling, the sintered brick micro powder mainly plays a role in filling and gelling, and the method can obviously improve the compactness, strength and water stability of the roadbed filling.
Drawings
To further illustrate the present invention, further description is provided below with reference to the accompanying drawings:
FIG. 1 is a flow chart of the sintered brick micro-powder treatment process.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features. In order to better understand the present invention, the following examples are given by way of illustration only, but it should be understood that the present invention is applicable only to the following examples, and those skilled in the art can make insubstantial modifications and adaptations of the present invention based on the above disclosure and still fall within the scope of the present invention.
Examples 1 to 22 belong to scheme one; b example 1 to B example 16 belong to scheme two; the first and second schemes may be combined with each other.
Example 1:
a method for improving the roadbed filler of construction waste by using sintered brick micro powder as a modifier mainly comprises the following steps:
(1) sorting: separating and sorting the baked bricks in the construction waste by adopting a manual or mechanical sorting mode;
(2) removing impurities: removing sundries such as iron nails, wood, glass, plastics, electric wires and the like in the sintered bricks;
(3) crushing: crushing the sintered bricks by using a crusher to obtain sintered brick materials with the particle size of less than 40 mm;
(4) grinding: grinding the sintered brick material by using a grinding machine, and obtaining sintered brick micro powder with the particle size of less than 300um through vibration screening;
mixing the sintered brick micropowder, the construction waste filler (silt, expansive soil and the like), a certain amount of cement and an excitant according to relevant specifications by adopting a manual mixing or mechanical mixing mode (wherein the mass percent of the sintered brick micropowder and the construction waste filler in the construction waste roadbed filler is 30%, the mass percent of the cement and the construction waste filler is 1%, the modulus of the excitant is 1.6, and Na is added2The mass ratio of the O to the sintered brick powder is 2 percent, and then a certain amount of water is added and uniformly stirred (the mass percentage of the water in the roadbed filler to the roadbed filler is 15 percent), so as to obtain the improved roadbed filler.
According to the test method specified in GB/T50123-1999, a cylindrical sample with the diameter of 50mm and the height of 100mm is prepared, and the sample is placed into a standard curing box for constant temperature and humidity curing for 7d after being prepared.
Example 2:
this example is different from example 1 in that the particle size of the baked brick fine powder is less than 100. mu.m.
Example 3:
the difference between the embodiment and the embodiment 1 is that the mass percentage of water and roadbed filling is 20%.
Example 4:
the difference between the embodiment and the embodiment 1 is that the mass percentage of water and roadbed filling is 25%.
Example 5:
the difference between the embodiment and the embodiment 1 is that the mass percentage of the cement and the construction waste filler in the roadbed filler is 2%.
Example 6:
the difference between the embodiment and the embodiment 1 is that the mass percentage of the cement and the construction waste filler in the roadbed filler is 3%.
Example 7:
this example differs from example 1 in that the modulus of the activator is 1.2.
Example 8:
this example differs from example 1 in that the modulus of the booster is 1.4.
Example 9:
this example differs from example 1 in that Na is present in the trigger sample2The mass ratio of O to the sintered brick powder is 3 percent.
Example 10:
this example differs from example 1 in that Na is present in the trigger sample2The mass ratio of O to the sintered brick powder is 5 percent.
Example 11:
the difference between the embodiment and the embodiment 1 is that the mass percentage of the sintered brick micro powder and the construction waste filler in the roadbed filler is 5%.
Example 12:
the difference between the embodiment and the embodiment 1 is that the mass percentage of the sintered brick micro powder and the construction waste filler in the roadbed filler is 35%.
Example 13:
this example differs from example 1 in that no cement is added.
Example 14:
this example is different from example 1 in that no cement is added and the particle size of the baked brick fine powder is less than 100. mu.m.
Example 15:
the difference between the embodiment and the embodiment 1 is that no cement is added, and the mass percentage of the sintered brick micro powder and the construction waste filler in the roadbed filler is 5%.
Example 16:
this example differs from example 1 in that no cement is added and the modulus of the activator is 1.2.
Example 17:
this example differs from example 1 in that no cement is added and the modulus of the activator is 1.4.
Example 18:
this example differs from example 1 in that no cement was added and Na was contained in the activator sample2The mass ratio of O to the sintered brick powder is 3 percent.
Example 19:
this example differs from example 1 in that no cement was added and Na was contained in the activator sample2The mass ratio of O to the sintered brick powder is 5 percent.
Example 20:
this example differs from example 1 in that no brick dust and no activator were added.
Example 21:
the difference between the embodiment and the embodiment 1 is that brick powder and an excitant are not added, and the mass percentage of the cement to the building garbage filler is 2%.
Example 22:
the difference between the embodiment and the embodiment 1 is that brick powder and an excitant are not added, and the mass percentage of the cement to the building garbage filler is 3%.
The unconfined compressive strength of the modified building garbage roadbed filler sample after maintenance is tested by referring to the unconfined compressive strength test method in GB/T50123-1999, and the test results are shown in Table 1:
TABLE 1 unconfined compressive strength of construction waste roadbed filler before and after modification
Comparing unconfined compressive strengths of the construction waste roadbed fillers before and after modification:
according to the data, the activity of the sintered brick micro powder is activated by the alkaline activator through the improvement method, the unconfined compressive strength of the construction waste roadbed filler is obviously improved, the same strength value is achieved, and the cement consumption is obviously reduced.
The activator comprises the following effective components: NaOH and Na2O·3SiO3(the groups of activators referred to in this patent differ by NaOH and Na2O·3SiO3The amount of (A) is different according to the modulus of the trigger and Na2Calculation of the content of O NaOH and Na2O·3SiO3Amount of (d) for example Na when the modulus of the activator is 1.62When the O content is 2 percent and the cement content is 1 percent, NaOH and Na in the excitant2O·3SiO3The ratio of the amounts of substances of (a) to (b) is 149: 71.
modulus of the excitant: SiO 22With Na2The mass ratio of O.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the construction waste roadbed filler is modified by the sintered brick grinding micro powder, and the sintered brick micro powder is filled into the pores of the construction waste roadbed filler; the sintered brick micro powder has a gelling effect after being excited to have potential activity by the exciting agent, path fillers with different particle sizes are cemented, the interface between the sintered brick micro powder and the construction waste roadbed filler is optimized, and the strength, compactness and water stability of the roadbed filler are improved;
2. the invention adopts the sintered brick grinding micro powder as the roadbed filling modifier, and can greatly improve the resource utilization efficiency of the construction waste in roadbed filling. The selected baked bricks and the construction waste are wastes generated by building removal and modification, so that natural resources can be saved, the environment is protected, and a new idea is provided for recycling the construction wastes;
3. the method has simple operation process, does not need complex equipment and expensive raw materials, and has high practical significance and practical value.
Scheme two corresponds to the example:
the invention provides a formula proportioning method for enhancing the activity of sintered brick micro powder, which mainly comprises the following steps:
(1) preparing sintered brick micro powder:
separating and sorting the baked bricks in the construction waste by adopting a manual or mechanical sorting mode; removing sundries such as iron nails, glass, plastics, electric wires and the like in the sintered bricks; crushing the sintered bricks by using a crusher, grinding the crushed sintered brick materials by using a ball mill, and performing vibration screening to obtain sintered brick micro powder with the particle size of less than 100 um;
(2) preparation of activity enhancer:
mixing Na2SiO3、NaOH、Al(OH)3、Na2SO4Uniformly mixing calcium lignosulphonate and sodium polycarboxylate according to an optimal formula ratio;
(3) preparing sintered brick micro powder slurry:
and mixing the sintered brick micro powder, the cement, the activity enhancer and the water according to the optimal formula proportion by adopting a manual mixing or mechanical mixing mode according to the relevant specifications to obtain sintered brick micro powder slurry.
Wherein:
the particle size of the preferred baked brick micro powder is less than 100 um;
preferred is Na2SiO3、NaOH、Al(OH)3、Na2SO4And the ratio of calcium lignosulphonate is (3-5): (1-2): 1: 1: (0.5 to 1);
the preferable sodium polycarboxylate accounts for 0.3 to 0.5 percent of the mass percent of the sintered brick micro powder;
the mass of the optimized active reinforcing agent accounts for 8 to 10 percent of the mass of the sintered brick micro powder;
the preferable cement accounts for 1 to 3 percent of the mass of the sintered brick micro powder;
the activity enhancer should meet the requirements of relevant specifications or industry standards;
the cement is ordinary portland cement and should meet the requirements of relevant specifications or standards;
has the advantages that:
compared with the prior art, the invention has the following advantages:
1. the invention provides a formula proportioning method for enhancing the activity of sintered brick micro-powder, which is characterized in that waste sintered bricks are prepared into light powder materials with higher added values, the activity of the sintered bricks is greatly enhanced through a proper amount of activity enhancing agents, and a regenerated active admixture meeting the actual demand is obtained; meanwhile, the excessive addition of the exciting agent is avoided, so that the phenomena of saltpetering of the terrace roadbed filling and the mortar product after a certain age period can be avoided, and the material performance and the building (structure) attractiveness are not influenced.
2. The selected sintered bricks are wastes generated by building removal and modification, and the recycling mode of the building wastes conforms to the sustainable development policy of China, so that natural resources can be saved, the environment can be protected, and a new idea is provided for recycling the building wastes;
3. the method has simple operation process, does not need complex equipment and expensive raw materials, and has high practical significance and practical value.
Example 1:
a formula proportioning method for enhancing the activity of sintered brick micro powder mainly comprises the following steps:
(1) preparing sintered brick micro powder:
separating and sorting the baked bricks in the construction waste by adopting a manual or mechanical sorting mode; removing sundries such as iron nails, glass, plastics, electric wires and the like in the sintered bricks; crushing the sintered bricks by using a crusher, grinding the crushed sintered brick materials by using a ball mill, and performing vibration screening to obtain sintered brick micro powder with the particle size of less than 100 um;
(2) preparation of activity enhancer:
mixing Na2SiO3、NaOH、Al(OH)3、Na2SO4The calcium lignosulphonate is prepared according to the following steps of 3: 1: 1: 1: 0.5, and the sodium polycarboxylate accounts for 0.3 percent of the mass of the sintered brick micro powder.
(3) Preparing red brick powder slurry:
according to relevant specifications, the sintered brick micro powder, the cement and the activity enhancer are uniformly mixed according to the formula proportion by adopting a manual mixing or mechanical mixing mode, and then water is added for uniform mixing (the mass ratio of the activity enhancer to the sintered brick micro powder is 6%, the mass ratio of the cement to the sintered brick micro powder is 1%, and the mass ratio of the water to the sintered brick micro powder is 10%).
Preparing a cylindrical sintered brick micro powder slurry sample with the diameter of 50mm and the height of 50mm, and after the sample is prepared, putting the sample into a standard curing box for constant temperature and humidity curing for 7 d.
Example 2B:
this example differs from example 1B in that the particle size of the baked brick micropowder is less than 200 um.
Example 3B:
this example differs from example 1B in that the particle size of the baked brick micropowder is less than 300 um.
Example 4:
this example differs from B example 1 in Na2SiO3、NaOH、Al(OH)3Na2SO4 and calcium lignosulfonate in a ratio of 4: 1: 1: 1: 0.5.
example 5:
this example differs from B example 1 in Na2SiO3、NaOH、Al(OH)3Na2SO4 and calcium lignosulfonate in a ratio of 5: 1: 1: 1: 0.5.
example 6:
this example differs from B example 1 in Na2SiO3、NaOH、Al(OH)3Na2SO4 and calcium lignosulfonate in a ratio of 3: 2: 1: 1: 0.5.
example 7:
this example differs from B example 1 in Na2SiO3、NaOH、Al(OH)3、Na2SO4And the ratio of calcium lignosulphonate is 3: 1: 1: 1: 1.
example 8B:
this example differs from B example 1 in Na2SiO3、NaOH、Al(OH)3、Na2SO4And the ratio of calcium lignosulphonate is 3: 1: 1: 1: 1.5.
example 9B:
the difference between the embodiment and the B embodiment 1 is that the mass percent of the sodium polycarboxylate in the sintered brick micro powder is 0.4%.
Example 10:
the difference between the embodiment and the B embodiment 1 is that the mass percent of the sodium polycarboxylate in the sintered brick micro powder is 0.5%.
Example 11B:
the difference between the embodiment and the B embodiment 1 is that the mass percentage of the activity reinforcing agent in the sintered brick micro powder is 8 percent.
Example 12:
the difference between the embodiment and the B embodiment 1 is that the active reinforcing agent accounts for 10 percent of the mass of the sintered brick micro powder.
Example 13:
the difference between the embodiment and the embodiment 1 is that the mass percentage of the cement in the sintered brick micro powder is 2 percent.
Example 14:
the difference between the embodiment and the embodiment 1 is that the mass percentage of the cement in the sintered brick micro powder is 3 percent.
Example 15B:
the difference between the embodiment and the embodiment 1 is that the mass percentage of water in the slurry in the sintered brick micro powder is 15%.
Example 16:
the difference between the embodiment and the embodiment 1 is that the mass percentage of water in the slurry in the sintered brick micro powder is 20%.
The compressive strength of the cured mortar is tested for 7d according to a mortar compressive strength test method in GB/T17671 'Cement mortar Strength test method'.
Attached watch
TABLE 1 chemical composition analysis of the micropowder of waste baked bricks
| Chemical composition | SiO2 | Al2O3 | Fe2O3 | K2O | MgO | TiO2 | CaO | Na2O |
| Content (%) | 67.36 | 17.02 | 8.23 | 2.46 | 1.27 | 1.14 | 1.12 | 0.688 |
TABLE 2 compression Strength of sintered brick micropowder slurry 7d
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is to be limited to the embodiments described above.
Claims (8)
1. The improved construction waste roadbed filling material using the sintered brick micro powder as a modifier is characterized by comprising the following substances in parts by weight: 5-35 parts of sintered brick micro powder; 100 parts of building garbage filler.
2. An improved construction waste roadbed filling material using baked brick micropowder as a modifier according to claim 1, characterized by further comprising the following substances in parts by weight: na in excitant sample2The mass percentage of O in the sintered brick micro powder is 1-5%.
3. The improved construction waste roadbed filling material using the baked brick micropowder as the modifier according to claim 1, wherein the improved construction waste roadbed filling material further comprises 1-3 parts by weight of cement.
4. The improved construction waste roadbed filling material using the baked brick micropowder as the modifier according to claim 1, wherein the improved construction waste roadbed filling material further comprises 15-25 parts by weight of water.
5. An improved construction waste roadbed filling material using the sintered brick micro powder as the modifier according to claim 1, wherein the particle size of the sintered brick micro powder is less than or equal to 300 μm; the modulus of the excitant is 1.2-1.6.
6. A method for improving the roadbed filling material of construction waste by using sintered brick micro powder as a modifier, which is characterized in that the filling material of any one of claims 1 to 4 is used, and the method comprises the following steps:
(1) sorting: separating and sorting the baked bricks in the construction waste by adopting a manual or mechanical sorting mode;
(2) removing impurities: removing sundries such as iron nails, wood, glass, plastics, electric wires and the like in the sintered bricks;
(3) crushing: crushing the sintered bricks by using a crusher to obtain sintered brick materials with the particle size of less than 40 mm;
(4) grinding: grinding the sintered brick material with the grain size less than 40mm by using a grinding machine, and obtaining sintered brick micro powder with the grain size less than 300 mu m by vibration screening;
the method comprises the steps of mixing the sintered brick micro powder, the building garbage filler, the cement and the excitant by adopting a manual mixing or mechanical mixing mode, and then adding water for stirring uniformly to obtain the improved roadbed filler.
7. The method for improving the roadbed filling material of the construction waste by using the micro powder of the baked brick as the modifier according to claim 5, wherein the micro powder of the baked brick is filled in the pores of the roadbed filling material of the construction waste; the sintered brick micro powder has a gelling effect after being excited to have potential activity by the exciting agent, path fillers with different particle sizes are cemented, the interface between the sintered brick micro powder and the construction waste roadbed filler is optimized, and the strength, compactness and water stability of the roadbed filler can be improved.
8. The use of the sintered brick micro powder as a modifier in the preparation of the modified construction waste roadbed filling material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813555.8A CN113636822A (en) | 2021-07-19 | 2021-07-19 | Improved construction waste roadbed filler using sintered brick micro powder as modifier and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813555.8A CN113636822A (en) | 2021-07-19 | 2021-07-19 | Improved construction waste roadbed filler using sintered brick micro powder as modifier and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113636822A true CN113636822A (en) | 2021-11-12 |
Family
ID=78417651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110813555.8A Pending CN113636822A (en) | 2021-07-19 | 2021-07-19 | Improved construction waste roadbed filler using sintered brick micro powder as modifier and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113636822A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120113476A (en) * | 2011-04-05 | 2012-10-15 | (주)대우건설 | Environmentally friendly low heat mix cement composition, environmentally friendly low heat concrete using thereof, and manufacturing method thereof |
| CN104086131A (en) * | 2014-07-25 | 2014-10-08 | 衣大明 | Road paving material prepared by compounding building rubbish and limestone flour and preparation method of road paving material |
| CN104119043A (en) * | 2014-07-24 | 2014-10-29 | 新奥生态建材有限公司 | Road paving material taking building waste as main material and preparation method of road paving material |
| CN104671720A (en) * | 2015-03-12 | 2015-06-03 | 北京元泰达环保建材科技有限责任公司 | Road filling material prepared from building waste and coal gangue and preparation method of road filling material |
| CN110937872A (en) * | 2019-11-26 | 2020-03-31 | 首钢环境产业有限公司 | Inorganic binder stabilizing material and preparation method and application thereof |
-
2021
- 2021-07-19 CN CN202110813555.8A patent/CN113636822A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120113476A (en) * | 2011-04-05 | 2012-10-15 | (주)대우건설 | Environmentally friendly low heat mix cement composition, environmentally friendly low heat concrete using thereof, and manufacturing method thereof |
| CN104119043A (en) * | 2014-07-24 | 2014-10-29 | 新奥生态建材有限公司 | Road paving material taking building waste as main material and preparation method of road paving material |
| CN104086131A (en) * | 2014-07-25 | 2014-10-08 | 衣大明 | Road paving material prepared by compounding building rubbish and limestone flour and preparation method of road paving material |
| CN104671720A (en) * | 2015-03-12 | 2015-06-03 | 北京元泰达环保建材科技有限责任公司 | Road filling material prepared from building waste and coal gangue and preparation method of road filling material |
| CN110937872A (en) * | 2019-11-26 | 2020-03-31 | 首钢环境产业有限公司 | Inorganic binder stabilizing material and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Madurwar et al. | Use of sugarcane bagasse ash as brick material | |
| CN1089732C (en) | Process for preparing high-activity concrete additive | |
| CN112110705B (en) | Self-repairing semi-rigid base material for recycling construction waste | |
| CN112341101B (en) | Light recycled concrete and preparation method thereof | |
| CN107473670A (en) | A kind of modification method of mortar and the environmentally friendly mortar containing granite waste stone dust | |
| CN109485338A (en) | A kind of construction refuse regenerated aggregate pavement brick and preparation method thereof | |
| CN110078449B (en) | Baking-free brick prepared from sludge generated by flushing broken stone and machine-made sand and preparation method thereof | |
| CN103043977A (en) | Superfine slag powder baking-free brick and production method thereof | |
| CN105601135A (en) | Method for preparing geopolymer materials from red mud and coal ash | |
| CN106478033A (en) | A kind of production technology of autoclaved lime-sand brick | |
| CN108341637A (en) | It is a kind of using light ceramic as the assembled inner partition plate of aggregate | |
| CN115215597A (en) | Shield slag slurry alkali-activated regenerated mortar and preparation method and application thereof | |
| CN106045558A (en) | Aerated concrete block preparation method | |
| CN113735550A (en) | Magnesium oxychloride cement-based muck non-fired building material and preparation method thereof | |
| CN112174602A (en) | Mixture for concrete road base | |
| CN107056163A (en) | A kind of method that aluminum oxide industry waste material prepares concrete | |
| CN111662021A (en) | Cement-based composite cementing material containing waste clay brick powder and limestone powder | |
| CN115028395B (en) | Solid waste building material product and preparation method thereof | |
| CN115536358A (en) | Industrial solid waste carbonization and solidification baking-free building block and preparation method thereof | |
| CN113636822A (en) | Improved construction waste roadbed filler using sintered brick micro powder as modifier and method | |
| CN112321249B (en) | Coal gangue based foam light soil and preparation method thereof | |
| CN113387609A (en) | Preparation method of sintered brick micro-powder slurry capable of increasing dry density and activity enhancer | |
| CN115321897A (en) | Low-carbon cementing material with high early strength and processing method thereof | |
| CN115304339A (en) | Autoclaved aerated concrete based on granite sand washing tail mud and preparation method thereof | |
| CN108996963B (en) | concrete pavement brick and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211112 |