CN111517729A - Sleeve grouting material for connecting steel bars of fabricated building - Google Patents
Sleeve grouting material for connecting steel bars of fabricated building Download PDFInfo
- Publication number
- CN111517729A CN111517729A CN202010474261.2A CN202010474261A CN111517729A CN 111517729 A CN111517729 A CN 111517729A CN 202010474261 A CN202010474261 A CN 202010474261A CN 111517729 A CN111517729 A CN 111517729A
- Authority
- CN
- China
- Prior art keywords
- grouting material
- waste concrete
- parts
- sleeve grouting
- micro powder
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 88
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 239000004567 concrete Substances 0.000 claims abstract description 86
- 239000002699 waste material Substances 0.000 claims abstract description 73
- 239000000843 powder Substances 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims abstract description 58
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000006004 Quartz sand Substances 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims description 53
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 52
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 26
- 238000002360 preparation method Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 14
- 239000004113 Sepiolite Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 229910052624 sepiolite Inorganic materials 0.000 claims description 14
- 235000019355 sepiolite Nutrition 0.000 claims description 14
- 241000209094 Oryza Species 0.000 claims description 13
- 235000007164 Oryza sativa Nutrition 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 13
- 235000009566 rice Nutrition 0.000 claims description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 239000012634 fragment Substances 0.000 claims description 10
- 235000013379 molasses Nutrition 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000003112 inhibitor Substances 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 235000012255 calcium oxide Nutrition 0.000 claims description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- -1 glycerin fatty acid ester Chemical class 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 241001474374 Blennius Species 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 3
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims description 2
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 2
- 229940072056 alginate Drugs 0.000 claims description 2
- 235000010443 alginic acid Nutrition 0.000 claims description 2
- 229920000615 alginic acid Polymers 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 125000005456 glyceride group Chemical group 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 4
- 239000011440 grout Substances 0.000 claims 2
- 235000011187 glycerol Nutrition 0.000 claims 1
- 230000004913 activation Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 46
- 230000000694 effects Effects 0.000 description 12
- 239000000654 additive Substances 0.000 description 9
- 239000002956 ash Substances 0.000 description 9
- 230000000996 additive effect Effects 0.000 description 8
- 238000006703 hydration reaction Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 230000036571 hydration Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 150000004683 dihydrates Chemical class 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- PLYWEXFVESBTFL-UHFFFAOYSA-N O(C=1C=C(C(C(=O)NN)=CC1)C(=O)O)C=1C=C(C(C(=O)NN)=CC1)C(=O)O Chemical compound O(C=1C=C(C(C(=O)NN)=CC1)C(=O)O)C=1C=C(C(C(=O)NN)=CC1)C(=O)O PLYWEXFVESBTFL-UHFFFAOYSA-N 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical group OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052599 brucite Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
- C04B20/023—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
- 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
-
- 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
- C04B20/04—Heat 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
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010474261.2A CN111517729B (en) | 2020-05-29 | 2020-05-29 | Sleeve grouting material for connecting steel bars of fabricated building |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010474261.2A CN111517729B (en) | 2020-05-29 | 2020-05-29 | Sleeve grouting material for connecting steel bars of fabricated building |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111517729A true CN111517729A (en) | 2020-08-11 |
CN111517729B CN111517729B (en) | 2022-02-15 |
Family
ID=71911053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010474261.2A Active CN111517729B (en) | 2020-05-29 | 2020-05-29 | Sleeve grouting material for connecting steel bars of fabricated building |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111517729B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113880535A (en) * | 2021-10-29 | 2022-01-04 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
CN114716174A (en) * | 2022-02-28 | 2022-07-08 | 沈阳建筑大学 | Waste concrete active slag powder and preparation method and application thereof |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007238745A (en) * | 2006-03-08 | 2007-09-20 | Denki Kagaku Kogyo Kk | Grout composition and grout mortar using the same |
CN104944869A (en) * | 2014-03-31 | 2015-09-30 | 天津天筑建材有限公司 | Grouting material for connecting prefabricated assembled concrete component sleeve |
CN105236869A (en) * | 2014-07-08 | 2016-01-13 | 上海城建物资有限公司 | Special high strength grouting material for connecting reinforcement sleeve |
CN106699077A (en) * | 2016-12-19 | 2017-05-24 | 重庆市建筑科学研究院 | Sleeve grouting material for assembly type building steel bar connection |
CN108947424A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of fiber reinforcement reinforcing bar sleeve for connection grouting material and preparation method thereof |
CN109704607A (en) * | 2019-02-14 | 2019-05-03 | 合肥国瑞集成建筑科技有限公司 | A kind of regeneration concrete micro mist preparation method |
-
2020
- 2020-05-29 CN CN202010474261.2A patent/CN111517729B/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007238745A (en) * | 2006-03-08 | 2007-09-20 | Denki Kagaku Kogyo Kk | Grout composition and grout mortar using the same |
CN104944869A (en) * | 2014-03-31 | 2015-09-30 | 天津天筑建材有限公司 | Grouting material for connecting prefabricated assembled concrete component sleeve |
CN105236869A (en) * | 2014-07-08 | 2016-01-13 | 上海城建物资有限公司 | Special high strength grouting material for connecting reinforcement sleeve |
CN106699077A (en) * | 2016-12-19 | 2017-05-24 | 重庆市建筑科学研究院 | Sleeve grouting material for assembly type building steel bar connection |
CN108947424A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of fiber reinforcement reinforcing bar sleeve for connection grouting material and preparation method thereof |
CN109704607A (en) * | 2019-02-14 | 2019-05-03 | 合肥国瑞集成建筑科技有限公司 | A kind of regeneration concrete micro mist preparation method |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113880535A (en) * | 2021-10-29 | 2022-01-04 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
CN113880535B (en) * | 2021-10-29 | 2023-10-13 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
CN114716174A (en) * | 2022-02-28 | 2022-07-08 | 沈阳建筑大学 | Waste concrete active slag powder and preparation method and application thereof |
Also Published As
Publication number | Publication date |
---|---|
CN111517729B (en) | 2022-02-15 |
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Effective date of registration: 20231204 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 110168 No. 9 Hunnan East Road, Hunnan District, Shenyang City, Liaoning Province Patentee before: SHENYANG JIANZHU University |
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Effective date of registration: 20240305 Address after: No. 168 Changgang Middle Road, Haizhu District, Guangzhou City, Guangdong Province, 510000 Patentee after: Guangzhou municipal engineering maintenance Office Co.,Ltd. Country or region after: China Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Country or region before: China |