CN117865618B - Light foamed cement partition board for building and production method thereof - Google Patents
Light foamed cement partition board for building and production method thereof Download PDFInfo
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- CN117865618B CN117865618B CN202410092499.7A CN202410092499A CN117865618B CN 117865618 B CN117865618 B CN 117865618B CN 202410092499 A CN202410092499 A CN 202410092499A CN 117865618 B CN117865618 B CN 117865618B
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- 239000004568 cement Substances 0.000 title claims abstract description 117
- 238000005192 partition Methods 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000000839 emulsion Substances 0.000 claims abstract description 40
- 238000005187 foaming Methods 0.000 claims abstract description 36
- 229920000642 polymer Polymers 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 62
- 239000000835 fiber Substances 0.000 claims description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 31
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical group [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 28
- 229920002907 Guar gum Polymers 0.000 claims description 25
- 239000000665 guar gum Substances 0.000 claims description 25
- 229960002154 guar gum Drugs 0.000 claims description 25
- 235000010417 guar gum Nutrition 0.000 claims description 25
- 229920006231 aramid fiber Polymers 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 21
- 239000010881 fly ash Substances 0.000 claims description 19
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 16
- 125000002091 cationic group Chemical group 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 12
- LUEWUZLMQUOBSB-FSKGGBMCSA-N (2s,3s,4s,5s,6r)-2-[(2r,3s,4r,5r,6s)-6-[(2r,3s,4r,5s,6s)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2r,4r,5s,6r)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol Chemical compound O[C@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@@H](O[C@@H]2[C@H](O[C@@H](OC3[C@H](O[C@@H](O)[C@@H](O)[C@H]3O)CO)[C@@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O LUEWUZLMQUOBSB-FSKGGBMCSA-N 0.000 claims description 11
- 229920002581 Glucomannan Polymers 0.000 claims description 11
- 229920002752 Konjac Polymers 0.000 claims description 11
- 229940046240 glucomannan Drugs 0.000 claims description 11
- 235000010485 konjac Nutrition 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 11
- 238000012986 modification Methods 0.000 claims description 11
- 239000004760 aramid Substances 0.000 claims description 10
- 229920003235 aromatic polyamide Polymers 0.000 claims description 10
- 239000011398 Portland cement Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 8
- 239000003469 silicate cement Substances 0.000 claims description 8
- ITCAUAYQCALGGV-XTICBAGASA-M sodium;(1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical compound [Na+].C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C([O-])=O ITCAUAYQCALGGV-XTICBAGASA-M 0.000 claims description 8
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 claims description 6
- 244000247812 Amorphophallus rivieri Species 0.000 claims description 6
- 235000001206 Amorphophallus rivieri Nutrition 0.000 claims description 6
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 239000000252 konjac Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 239000008213 purified water Substances 0.000 claims description 6
- 239000011344 liquid material Substances 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 4
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 claims description 4
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical group C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- JGOICJFFICGNEJ-UHFFFAOYSA-M disodium;3-[dihydroxy(oxido)silyl]propanoate Chemical compound [Na+].[Na+].O[Si](O)([O-])CCC([O-])=O JGOICJFFICGNEJ-UHFFFAOYSA-M 0.000 claims description 3
- 229960003638 dopamine Drugs 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 239000011343 solid material Substances 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 6
- 239000002253 acid Substances 0.000 claims 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims 1
- 125000001624 naphthyl group Chemical group 0.000 claims 1
- 238000004321 preservation Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 7
- 239000004566 building material Substances 0.000 abstract description 3
- 229920005646 polycarboxylate Polymers 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 239000006260 foam Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000008030 superplasticizer Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- -1 quaternary ammonium cations Chemical class 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- YQHHCMVUMULAPZ-UHFFFAOYSA-N C[CH2+] Chemical compound C[CH2+] YQHHCMVUMULAPZ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 239000011381 foam concrete Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical group O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 238000005406 washing 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to the technical field of building materials and discloses a lightweight foaming cement partition board for building and a production method thereof. The addition of the composite polymer emulsion can control the foaming process of the cement paste, enhance the compressive strength of the foamed cement partition board from the perspective of improving the foaming stability, and simultaneously ensure the heat preservation performance of the foamed cement partition board.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a lightweight foaming cement partition board for building and a production method thereof.
Background
In modern buildings, light foamed cement partition boards are increasingly used, and are mainly composed of foamed cement, and bubbles in cement slurry are introduced through a foaming agent to form a light and porous material. The material is light in weight and has good sound insulation and heat preservation effects. Compared with the traditional wall material, the lightweight foamed cement partition board has remarkable advantages. Firstly, the weight of the building is lighter, the burden of the building structure can be greatly reduced, and the building cost is reduced. And secondly, the heat insulation and sound insulation performance is excellent, and the comfort and energy saving effect of the building can be effectively improved. In addition, the production process of the lightweight foamed cement partition board does not use any harmful substances such as clay or asbestos, and the like, and is environment-friendly. The lightweight foamed cement partition board is gradually and widely concerned and applied as a novel building material, and provides an environment-friendly and efficient solution for modern buildings.
However, the lightening of the foamed cement partition board reduces the compressive strength to a certain extent, so that the use stability of the foamed cement partition board is poor, the further development of the foamed cement partition board is greatly hindered, and in order to solve the problem, the invention patent publication No. CN11943611B discloses a foamed cement heat insulation material which can effectively reduce the surface tension of foamed cement and prevent cracking by taking hydrogen peroxide, fatty alcohol polyoxyethylene ether, sodium dodecyl benzene sulfonate and tapioca starch as a composite foaming agent, thereby improving the compressive strength. Therefore, the problem of low compressive strength can be solved by adding various modifying components into the foaming cement.
Therefore, the invention provides the light foamed cement partition board which has the characteristics of high compressive strength and good heat preservation effect, and can be directly used as a building heat preservation material.
Disclosure of Invention
The invention aims to provide a lightweight foamed cement partition board for buildings and a production method thereof, which solve the problem of lower compressive strength of conventional foamed cement materials.
The aim of the invention can be achieved by the following technical scheme:
The production method of the light foamed cement partition board for the building comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, fiber modified components, compound polymer emulsion, water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 800-1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding a foaming agent and a foaming catalyst into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 1-2h after building is completed, foaming, placing the cement paste in a constant temperature curing room, curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board;
the fiber filling component is aramid fiber modified by macromolecular organic matters;
The polymer emulsion comprises styrene-acrylic emulsion, sodium abietate and cationic guar gum in a mass ratio of 1:0.5-1:0.4-1.2.
Further, the foamed cement partition board comprises the following components in parts by weight: 100-120 parts of Portland cement, 20-30 parts of fly ash, 5-15 parts of fiber modification components, 4-10 parts of compound polymer emulsion, 5-8 parts of foaming agent, 0.2-0.5 part of foaming catalyst, 1-2 parts of water reducer and 40-50 parts of water.
Further, the fiber-modifying component is prepared by the following method:
Step one, surface modification of aramid fiber
Placing aramid short fibers in a dopamine solution with the mass fraction of 2%, mechanically stirring for 4-6 hours at the temperature of 60-70 ℃ after uniformly dispersing, adding carboxyethyl silane triol sodium salt, uniformly stirring, keeping the temperature unchanged, continuously stirring for 6-12 hours, and filtering and separating out fiber materials;
Step two, modifying treatment of aramid fiber
Uniformly mixing the surface modified aramid fiber with dimethyl sulfoxide, controlling the ultrasonic frequency to be 60-80kHz, and performing ultrasonic dispersion until uniform liquid ① is formed; adding konjac glucomannan into dimethyl sulfoxide, and stirring and mixing uniformly to form uniform liquid material ②; adding a composite catalyst into the liquid ①, stirring for 40-60min after adding, introducing nitrogen, vacuumizing, dripping the liquid ②, stirring at normal temperature for 12-16h after adding, and separating into solid materials to obtain the fiber modified component.
Specifically, after the aramid fiber short fiber is modified by silane, an active carboxyl substituent is generated, and under the action of a composite catalyst, the active carboxyl substituent can be esterified and condensed with a substituted hydroxyl group in the konjak glucomannan, so that macromolecular konjak glucomannan is grafted on the surface of the aramid fiber, and the aramid fiber coated with konjak glucomannan, namely a fiber filling component, is formed.
Further, in the first step, the length of the aramid short fiber is 1-2mm.
Further, in the second step, the composite catalyst is dicyclohexylcarbodiimide and 4-dimethylaminopyridine.
Specifically, after the konjac glucomannan is used for modifying the aramid fiber, a dendritic macromolecule coating structure can be formed on the surface of the aramid fiber, on one hand, after the konjac glucomannan is modified, the hydrophilicity of the aramid fiber can be improved, the konjac glucomannan can penetrate into cement in the subsequent cement stirring process to perform a primary connection bridging function, and in the subsequent cement hardening process, cement particles, fly ash and the like can be adhered to the surface of the aramid fiber due to a certain gluing function, and hydration products such as tricalcium silicate hydrate and the like are formed by taking the aramid fiber as a core, so that the cement can generate a stress dispersion effect when being stressed, and the effect of improving the compressive strength of the foamed cement partition plate is achieved.
Still further, the formulated polymer emulsion is prepared by the method of:
Sequentially adding the styrene-acrylic emulsion and the sodium abietate into a stirrer, stirring and uniformly mixing at a stirring rate of 300-500r/min to form a premix, dissolving the cationic guar gum into water to prepare a glue solution with the mass fraction of 5-10%, pouring the glue solution into the premix, and stirring and uniformly mixing to form the composite polymer emulsion.
Specifically, the interaction force can be generated between the styrene-acrylic emulsion and sodium abietate, so that the emulsion has good interface performance, and the cation guar gum shows positive electricity because the sodium abietate shows electronegativity in aqueous solution, so that strong electrostatic adsorption can occur in the stirring process, the styrene-acrylic emulsion and the sodium abietate ethyl cation guar gum form a whole, the high gluing effect of the guar gum is utilized, the emulsifying degree of the styrene-acrylic emulsion is improved, the viscosity of the cement paste is further improved, the phenomenon that the cement paste is foamed continuously and is even broken in the foaming process is avoided, the foaming can be stably existing in the cement paste, the foaming dissipation is reduced, and the compressive strength of the foamed cement partition board is kept at a higher level.
Still further, the cationic guar gum is prepared by the following method:
Mixing guar gum and purified water, stirring until the guar gum and the purified water are completely dissolved, adding 2-chloro-N, N, N-trimethyl ethylammonium chloride and a catalyst into the mixed solution, mechanically stirring uniformly after the addition, starting heating, controlling the temperature to be 60-70 ℃, keeping the temperature for 4-8 hours under continuous stirring, and cooling and discharging to obtain the cationic guar gum.
Specifically, the guar gum structure contains abundant substituted hydroxyl groups, and can be subjected to substitution reaction with halogen substituents in 2-chloro-N, N, N-trimethyl ethylammonium chloride under the action of a catalyst, so that quaternary ammonium cations are modified in the guar gum structure, and the cationic guar gum is prepared.
Still further, the catalyst is any one of sodium carbonate, potassium carbonate or sodium bicarbonate.
Further, the water reducer is naphthalene water reducer or polycarboxylate water reducer; the foaming agent is hydrogen peroxide; the foaming catalyst is manganese oxide.
The lightweight foamed cement partition board for the building is manufactured by adopting the production method.
The invention has the beneficial effects that:
According to the invention, the fiber modified component and the compound polymer emulsion are manufactured as the additive components, so that the foaming cement partition board is manufactured, and the components can be connected in a bridging agent mode in the hydration and solidification process by adding the fiber modified component, so that the components can form a stable whole, and the compressive strength of the foaming cement partition board is improved. The addition of the composite polymer emulsion can control the foaming process of the cement paste, enhance the compressive strength of the foamed cement partition board from the viewpoint of improving the foaming stability, and simultaneously ensure the heat preservation performance of the foamed cement partition board, and the foamed cement partition board prepared by the method can reach 3.8MPa at most after being cured at normal temperature for 28 days, has a heat conductivity coefficient as low as 0.134W/(m.K), shows good compressive strength and heat preservation performance, and can be directly used as a building heat preservation material.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a scanning electron microscope view, wherein a is a scanning electron microscope view of an aramid short fiber, and B is a scanning electron microscope view of a fiber-modifying component.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Portland cement of 42.5 strength was used in the following examples and comparative examples; the fly ash is class I fly ash; the mass concentration of the hydrogen peroxide is 30%.
Example 1
The lightweight foamed cement partition board for the building comprises the following components in parts by weight: 100 parts of Portland cement, 20 parts of fly ash, 5 parts of fiber modification components, 4 parts of compound polymer emulsion, 5 parts of hydrogen peroxide, 0.2 part of manganese oxide, 1 part of polycarboxylate superplasticizer and 40 parts of water;
the preparation method of the foam cement partition board comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, fiber modified components, compound polymer emulsion, polycarboxylate water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding hydrogen peroxide and manganese oxide into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 1h after building is completed, foaming, placing the cement paste in a constant temperature curing room for curing for 5 days at normal temperature, removing the mould, continuously curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board.
Wherein the fiber modification component is prepared by the following method:
Step one, surface modification of aramid fiber
Placing 3.6g of aramid short fiber with the length of 2mm into 80mL of dopamine solution with the mass fraction of 2%, mechanically stirring for 6 hours at the temperature of 65 ℃ after uniform dispersion, adding 4.5g of carboxyethyl silanetriol sodium salt, uniformly stirring, keeping the temperature unchanged, continuously stirring for 9 hours, filtering and separating out fiber materials, washing by sequentially using hydrochloric acid with the mass fraction of 10% and purified water, and drying in vacuum;
Step two, modifying treatment of aramid fiber
Uniformly mixing 2.8g of surface modified aramid fiber with 80mL of dimethyl sulfoxide, controlling the ultrasonic frequency to be 6kHz, and performing ultrasonic dispersion until a uniform liquid material ① is formed; adding 1.5g of konjak glucomannan into 50mL of dimethyl sulfoxide, and stirring and mixing uniformly to form uniform liquid ②; adding 0.4g dicyclohexylcarbodiimide and 0.15g 4-dimethylaminopyridine into the liquid material ①, stirring for 60min, introducing nitrogen, vacuumizing, dripping the liquid material ②, stirring at normal temperature for 16h after the addition, and separating into solid materials to obtain the fiber modified component.
The surface morphology of the aramid short fiber and the fiber modified component is observed through a scanning electron microscope, the result is shown in figure 1, wherein A is the scanning electron microscope image of the aramid short fiber, analysis shows that the surface of the aramid short fiber is smooth, no obvious protrusions or depressions are generated, B is the scanning electron microscope image of the fiber modified component, a large number of protrusions and depressions are generated on the surface of the fiber modified component, and presumably, the surface of the aramid short fiber is provided with an organic macromolecule coating layer after the konjac glucomannan is modified, so that the special uneven morphology is formed, and the morphology can permeate into pores of components such as cement particles, thereby being beneficial to reducing the porosity and improving the compressive strength of the foamed cement partition plate.
Wherein the compound polymer emulsion is prepared by the following method:
Step A, mixing 5g of guar gum with purified water, stirring until the guar gum is completely dissolved, adding 1.6g of 2-chloro-N, N, N-trimethyl ethylammonium chloride and 1.5g of potassium carbonate into the mixed solution, mechanically stirring uniformly after the addition, starting heating, controlling the temperature to 65 ℃, keeping the temperature for 6 hours under continuous stirring, and cooling and discharging to obtain cationic guar gum;
0.5g of cationic guar gum is weighed as a test sample and placed in a CHN628 type element analysis to test the content of organic elements in the structure, and the test result shows that the percentage content of carbon elements is 44.33%, the content of nitrogen elements is 2.08%, and the guar gum structure does not contain nitrogen elements, so that the nitrogen elements are from quaternary ammonium cations.
And B, sequentially adding 15g of styrene-acrylic emulsion and 12g of sodium abietate into a stirrer, stirring and uniformly mixing at a stirring rate of 500r/min to form a premix, dissolving 9g of cationic guar gum into water to prepare a 10% glue solution, pouring the glue solution into the premix, and stirring and uniformly mixing to form the composite polymer emulsion.
Example 2
The lightweight foamed cement partition board for the building comprises the following components in parts by weight: 110 parts of Portland cement, 25 parts of fly ash, 12 parts of fiber modification components, 8 parts of compound polymer emulsion, 6 parts of hydrogen peroxide, 0.3 part of manganese oxide, 1.5 parts of polycarboxylate superplasticizer and 45 parts of water;
the preparation method of the foam cement partition board comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, fiber modified components, compound polymer emulsion, polycarboxylate water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding hydrogen peroxide and manganese oxide into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 2h after building is completed, foaming, placing the cement paste in a constant temperature curing room for curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board.
Wherein the fiber modifying component and the formulated polymer emulsion were prepared using the method of example 1.
Example 3
The lightweight foamed cement partition board for the building comprises the following components in parts by weight: 120 parts of Portland cement, 30 parts of fly ash, 15 parts of fiber modification group, 10 parts of compound polymer emulsion, 8 parts of hydrogen peroxide, 0.5 part of manganese oxide, 2 parts of polycarboxylate water reducer and 50 parts of water;
the preparation method of the foam cement partition board comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, fiber modified components, compound polymer emulsion, polycarboxylate water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding hydrogen peroxide and manganese oxide into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 2h after building is completed, foaming, placing the cement paste in a constant temperature curing room for curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board.
Wherein the fiber modifying component and the formulated polymer emulsion were prepared using the method of example 1.
Comparative example 1
The lightweight foamed cement partition board for the building comprises the following components in parts by weight: 110 parts of Portland cement, 25 parts of fly ash, 12 parts of aramid fiber, 8 parts of compound polymer emulsion, 6 parts of hydrogen peroxide, 0.3 part of manganese oxide, 1.5 parts of polycarboxylate superplasticizer and 45 parts of water;
the preparation method of the foam cement partition board comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, aramid fiber, compound polymer emulsion, polycarboxylate water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding hydrogen peroxide and manganese oxide into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 2h after building is completed, foaming, placing the cement paste in a constant temperature curing room for curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board.
Wherein the formulated polymer emulsion was prepared using the method of example 1.
Comparative example 2
The lightweight foamed cement partition board for the building comprises the following components in parts by weight: 110 parts of Portland cement, 25 parts of fly ash, 8 parts of compound polymer emulsion, 6 parts of hydrogen peroxide, 0.3 part of manganese oxide, 1.5 parts of polycarboxylate superplasticizer and 45 parts of water;
the preparation method of the foam cement partition board comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, compound polymer emulsion, polycarboxylate water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding hydrogen peroxide and manganese oxide into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 2h after building is completed, foaming, placing the cement paste in a constant temperature curing room for curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board.
Wherein the formulated polymer emulsion was prepared using the method of example 1.
Comparative example 3
The lightweight foamed cement partition board for the building comprises the following components in parts by weight: 110 parts of Portland cement, 25 parts of fly ash, 12 parts of fiber modification components, 6 parts of hydrogen peroxide, 0.3 part of manganese oxide, 1.5 parts of polycarboxylate superplasticizer and 45 parts of water;
the preparation method of the foam cement partition board comprises the following steps:
first, preparing cement paste
Pouring silicate cement, fly ash, fiber modified components, a polycarboxylate water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding hydrogen peroxide and manganese oxide into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 2h after building is completed, foaming, placing the cement paste in a constant temperature curing room for curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board.
Wherein the fiber modifying component was made using the method of example 1.
Performance detection
According to national standard GB/T29062-2012 autoclaved foam concrete brick and Block, thermal conductivity and compressive Strength tests were carried out, and the test results are recorded in Table 1:
TABLE 1 test results
Analysis of the results shows that the foamed cement partition board prepared by using the fiber modified component and the compound polymer emulsion as raw materials has good strength and heat preservation effect.
The mechanical property of the foamed cement partition board prepared by using the aramid fiber to replace the fiber modified component is reduced, because the cementing effect of the konjak glucomannan cannot be utilized, components such as cement and the like are tightly connected to the surface of the aramid fiber, gaps are generated among the components, and the strength is reduced.
The foamed cement partition board without the fiber component cannot utilize the bridging effect of the fiber, and thus the strength is further lowered.
In the foamed cement partition board manufactured by not adding the compound polymer emulsion, bubbles are easy to be continuously enlarged after foaming, even escape occurs, and the bubbles are difficult to stably exist in the cement partition board, so that the foaming content is less, the strength is reduced, and meanwhile, the heat preservation effect is greatly reduced.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The production method of the light foamed cement partition board for the building is characterized by comprising the following steps of:
first, preparing cement paste
Pouring silicate cement, fly ash, fiber modified components, compound polymer emulsion, water reducer and water into a stirrer, starting the stirrer, controlling the stirring speed to be 800-1000r/min, and mechanically stirring and uniformly mixing to form cement paste;
second step, manufacturing foaming cement partition board
Adding a foaming agent and a foaming catalyst into cement paste, stirring and mixing uniformly, pouring into a mould, standing for 1-2h after building is completed, foaming, placing the cement paste in a constant temperature curing room, curing for 5 days at normal temperature, removing the mould, curing for 10 days at normal temperature in the constant temperature curing room, and cutting to form the foamed cement partition board;
the fiber filling component is aramid fiber modified by macromolecular organic matters;
the fiber modified component is prepared by the following method:
Step one, surface modification of aramid fiber
Placing aramid short fibers in a dopamine solution with the mass fraction of 2%, mechanically stirring for 4-6 hours at the temperature of 60-70 ℃ after uniformly dispersing, adding carboxyethyl silane triol sodium salt, uniformly stirring, keeping the temperature unchanged, continuously stirring for 6-12 hours, and filtering and separating out fiber materials;
Step two, modifying treatment of aramid fiber
Uniformly mixing the surface modified aramid fiber with dimethyl sulfoxide, controlling the ultrasonic frequency to be 60-80kHz, and performing ultrasonic dispersion until uniform liquid ① is formed; adding konjac glucomannan into dimethyl sulfoxide, and stirring and mixing uniformly to form uniform liquid material ②; adding a composite catalyst into the liquid ①, stirring for 40-60min after adding, introducing nitrogen, vacuumizing, dripping the liquid ②, stirring at normal temperature for 12-16h after adding, and separating into solid materials to obtain a fiber modified component;
the compound polymer emulsion comprises styrene-acrylic emulsion, sodium abietate and cationic guar gum in a mass ratio of 1:0.5-1:0.4-1.2;
the compound polymer emulsion is prepared by the following method:
Sequentially adding the styrene-acrylic emulsion and sodium abietate into a stirrer, stirring and uniformly mixing at a stirring rate of 300-500r/min to form a premix, dissolving cationic guar gum into water to prepare a glue solution with a mass fraction of 5-10%, pouring the glue solution into the premix, and stirring and uniformly mixing to form a compound polymer emulsion;
The cationic guar gum is prepared by the following method:
Mixing guar gum and purified water, stirring until the guar gum and the purified water are completely dissolved, adding 2-chloro-N, N, N-trimethyl ethylammonium chloride and a catalyst into the mixed solution, mechanically stirring uniformly after the addition, starting heating, controlling the temperature to be 60-70 ℃, keeping the temperature for 4-8 hours under continuous stirring, and cooling and discharging to obtain the cationic guar gum.
2. The method for producing a lightweight foamed cement partition board for construction according to claim 1, wherein the foamed cement partition board comprises the following components in parts by weight: 100-120 parts of Portland cement, 20-30 parts of fly ash, 5-15 parts of fiber modification components, 4-10 parts of compound polymer emulsion, 5-8 parts of foaming agent, 0.2-0.5 part of foaming catalyst, 1-2 parts of water reducer and 40-50 parts of water.
3. The method for producing a lightweight foamed cement partition board for construction according to claim 1, wherein in the first step, the length of the aramid short fiber is 1-2mm.
4. The method for producing a lightweight foamed cement partition board for construction according to claim 1, wherein in the second step, the composite catalyst is dicyclohexylcarbodiimide and 4-dimethylaminopyridine.
5. The method for producing a lightweight foamed cement partition board for construction according to claim 1, wherein in the method for producing cationic guar gum, the catalyst is any one of sodium carbonate, potassium carbonate or sodium bicarbonate.
6. The method for producing a lightweight foamed cement partition board for construction according to any one of claims 1 to 2, wherein the water reducing agent is a naphthalene-based water reducing agent or a polycarboxylic acid water reducing agent; the foaming agent is hydrogen peroxide; the foaming catalyst is manganese oxide.
7. A lightweight foamed cement partition board for construction, characterized by being produced by the production method according to claim 1.
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