CN111517715A - 3D printing thermal insulation mortar and preparation method and application thereof - Google Patents
3D printing thermal insulation mortar and preparation method and application thereof Download PDFInfo
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- CN111517715A CN111517715A CN202010294960.9A CN202010294960A CN111517715A CN 111517715 A CN111517715 A CN 111517715A CN 202010294960 A CN202010294960 A CN 202010294960A CN 111517715 A CN111517715 A CN 111517715A
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 153
- 238000010146 3D printing Methods 0.000 title claims abstract description 111
- 238000009413 insulation Methods 0.000 title claims abstract description 99
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000002245 particle Substances 0.000 claims abstract description 70
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 41
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920006389 polyphenyl polymer Polymers 0.000 claims abstract description 40
- 239000006004 Quartz sand Substances 0.000 claims abstract description 38
- 239000011398 Portland cement Substances 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 33
- 229920005989 resin Polymers 0.000 claims abstract description 33
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 239000002562 thickening agent Substances 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims description 37
- 238000009826 distribution Methods 0.000 claims description 30
- 239000000203 mixture Substances 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 20
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 14
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 13
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 13
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 13
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 13
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 13
- 239000008187 granular material Substances 0.000 claims description 12
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 10
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 10
- 150000002148 esters Chemical class 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 150000002790 naphthalenes Chemical class 0.000 claims description 2
- 239000010453 quartz Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 238000001125 extrusion Methods 0.000 abstract description 9
- 239000000654 additive Substances 0.000 abstract description 4
- 230000000996 additive effect Effects 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 239000012802 nanoclay Substances 0.000 abstract description 3
- 238000004040 coloring Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 description 24
- 238000007639 printing Methods 0.000 description 18
- 238000012423 maintenance Methods 0.000 description 8
- 238000005303 weighing Methods 0.000 description 8
- 239000004568 cement Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009974 thixotropic effect Effects 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 229920000265 Polyparaphenylene Polymers 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 description 1
- 239000004137 magnesium phosphate Substances 0.000 description 1
- 229960002261 magnesium phosphate Drugs 0.000 description 1
- 229910000157 magnesium phosphate Inorganic materials 0.000 description 1
- 235000010994 magnesium phosphates Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011325 microbead Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- -1 polyphenylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
Abstract
The invention relates to the technical field of thermal insulation mortar, in particular to 3D printing thermal insulation mortar and a preparation method and application thereof. The thermal insulation mortar comprises the following components in parts by weight: 60-100 parts of white portland cement, 0.5-1.5 parts of water-based tackifying resin, 1-3 parts of nano montmorillonite, 5-10 parts of polyphenyl particles, 5-10 parts of quartz sand, 1-5 parts of vitrified micro bubbles, 0.3-1 part of thickening agent, 0.3-0.7 part of water reducing agent and 50-70 parts of water. The invention adopts white portland cement as a main cementing material and synergistically regulates the adhesive property and rheological property of the thermal mortar through the additive to meet the extrusion property requirement required by 3D printing. Meanwhile, the structural stability of the 3D printing thermal insulation mortar is improved by doping the nano clay material, so that the rheological property of the 3D printing thermal insulation mortar is controllable, the coloring is easy, and the mechanical property of the 3D printing thermal insulation mortar can be improved.
Description
Technical Field
The invention relates to the technical field of thermal insulation mortar, in particular to 3D printing thermal insulation mortar and a preparation method and application thereof.
Background
The information disclosed in this background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
The external wall heat insulation is used as an important part in the building energy saving link, so that the building is attractive, energy can be saved, and the service life of the building can be prolonged. However, for some buildings with complex structures and special performance requirements, the traditional preparation method is difficult to meet the requirements. Compared with the traditional building material preparation method, the 3D printing technology can greatly improve the production efficiency of the building material, is easy to print curved and complex buildings, and can endow some special performances to the building structure.
The thermal insulation mortar is prepared by taking cement as a cementing material and an organic thermal insulation material as a lightweight aggregate and adding an additive. The thermal insulation mortar is used as a core part in an external wall thermal insulation material, and plays an important role in efficiently developing building energy conservation. For example, a document discloses a preparation method of thermal insulation mortar for 3D printing, which comprises the following raw materials in parts by weight: 50-80 parts of magnesium phosphate cement, 18-29 parts of silicate cement, 0.5-1.2 parts of sepiolite powder, 35-45 parts of stone needle powder, 10-18 parts of zeolite powder, 20-40 parts of flax fiber, 1.5-3.5 parts of carbon fiber, 0.6-1.5 parts of air entraining agent, 0.2-1 part of water reducing agent, 0.4-1 part of sodium alginate, 5-10 parts of talcum powder and 40-50 parts of water. The heat-insulating mortar for 3D printing has the characteristics of good water resistance, small heat conductivity coefficient, good heat-insulating effect, high strength and brittleness reduction, and for example, a document discloses a waterproof heat-insulating mortar for 3D printing buildings and a preparation method and application thereof, wherein the raw materials comprise the following components in percentage by mass: 50-80% of composite cement, 10-20% of filler, 5-21% of hollow vitrified micro-beads, 0.2-0.4% of expanded vermiculite powder, 0.1-0.3% of straw fiber, 0.05-0.4% of steel-like fiber, 1.8-5.3% of composite penetrating agent, 0.2-2% of curing agent, 0.1-0.5% of defoaming agent, 0.3-0.7% of redispersible latex powder and 0.5-0.8% of water reducing agent. According to the technical scheme, the mechanical property, the flowability and the curing rate of the mortar can be effectively improved on the basis of ensuring the waterproof and heat-insulating properties of the mortar, so that the requirement of 3D printing of buildings is met.
However, the present inventors found that: the thermal insulation mortar has poor extrusion performance in a 3D printing system and poor structural stability after printing due to large particle grading difference between coarse aggregate, fine aggregate and a cementing material of the thermal insulation mortar and poor bonding performance between organic and inorganic materials, and is difficult to be practically applied in a 3D printing technology.
Disclosure of Invention
Aiming at the problems, the invention provides 3D printing thermal insulation mortar and a preparation method and application thereof. According to the invention, white portland cement is used as a main cementing material, and the adhesive property and rheological property of the thermal mortar are synergistically regulated and controlled through the additive, so that the extrusion property requirement required by 3D printing is met. In order to achieve the above object, the present invention discloses the following technical solutions.
The invention discloses a 3D printing thermal insulation mortar, which comprises the following raw materials in parts by weight: 60-100 parts of white portland cement, 0.5-1.5 parts of water-based tackifying resin, 1-3 parts of nano montmorillonite, 5-10 parts of polyphenyl particles, 5-10 parts of quartz sand, 1-5 parts of vitrified micro bubbles, 0.3-1 part of thickening agent, 0.3-0.7 part of water reducing agent and 50-70 parts of water.
Further, the 3D printing thermal mortar of the present invention can be selected within the following ranges, for example, the raw materials include the following components by weight: 70-90 parts of white portland cement, 0.8-1.2 parts of water-based tackifying resin, 1.2-2.7 parts of nano montmorillonite, 7-9 parts of polyphenyl particles, 6-8 parts of quartz sand, 2-4 parts of vitrified micro bubbles, 0.3-0.7 part of thickening agent, 0.3-0.5 part of water reducing agent and 56-68 parts of water.
Alternatively, the 3D printing thermal mortar of the present invention can be selected within the following ranges, for example, the raw materials include the following components by weight: 78-85 parts of white portland cement, 1-1.2 parts of aqueous tackifying resin, 1.5-2.2 parts of nano montmorillonite, 8-9 parts of polyphenyl granules, 7-8 parts of quartz sand, 3-4 parts of vitrified micro bubbles, 0.4-0.6 part of thickening agent, 0.35-0.4 part of water reducing agent and 60-65 parts of water.
In some embodiments of the present invention, the white portland cement has a particle size ranging from 0.5 to 89 μm and a Hunter whiteness ranging from 91 to 95. In the invention, white cement is used as a cementing material, so that the thermal insulation mortar is easy to color, and can be designed beautifully according to the requirements of engineering application.
In some embodiments of the invention, the viscosity of the aqueous tackifying resin is from 150 to 200 mPas at 100 rpm. The main component of the water-based tackifying resin is rosin ester, and the invention can obviously improve the adhesive property between organic and inorganic materials by doping the water-based tackifying resin and effectively improve the continuous extrusion property of the thermal insulation mortar in a 3D printing system. In addition, the water-based tackifying resin can be uniformly dispersed in the thermal insulation mortar, has good compatibility with slurry and does not have negative influence on mechanical properties.
In some embodiments of the invention, the nano montmorillonite has an apparent density of 1.91-1.95 g/m3The content of montmorillonite is not less than 96%, and the whiteness is 89-91. According to the invention, the structural stability of the thermal insulation mortar can be obviously improved by adding the nano clay, and the absorbed water can be released when the layered structure of the montmorillonite is extruded by the screw, so that the mortar is easier to extrude from a printer, and the free water in the mortar can be quickly absorbed after the extrusion, so that the static yield stress of the mortar is improved, and the deformation is resisted. Therefore, the thixotropic property of the mortar can be obviously improved by doping the nano montmorillonite, the static yield stress of the mortar is improved, and the structural deformation is improved. Meanwhile, the mechanical property of the mortar can be obviously improved by doping the nano material.
In some embodiments of the invention, the polyphenylene particles are characterized by a gradient gradation in size selected from: the grain size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm. Preferably, the mass ratio of the three gradient polyphenyl particles is 2-3: 1:1 in sequence. Experiments prove that the particle grading can better use the polyphenyl particles to improve the pore structure of the thermal insulation mortar, and meanwhile, the mechanical property is basically unchanged, and the thermal insulation performance is obviously improved.
In some embodiments of the invention, the quartz sand is characterized by a gradient grading selected from the group consisting of: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm. Preferably, the mass ratio of the three gradient quartz sands is 1-2: 2:3 in sequence. Experiments prove that the particle-graded quartz sand can obviously improve the compactness of the mortar and improve the mechanical property of the mortar.
In some embodiments of the invention, the vitrified beads are characterized by a gradient gradation in size selected as: the particle size distribution includes three gradients of 50-200 μm, 200-400 μm, and 400-600 μm. Preferably, the mass ratio of the three gradient vitrified micro bubbles is 1-2: 2:2 in sequence. Experiments prove that the particle-graded vitrified micro bubbles can obviously improve the compactness of the mortar and improve the mechanical and thermal insulation properties of the mortar. In addition, in the invention, the vitrified micro bubbles have a hollow structure, and the heat insulation performance of the heat insulation mortar can be obviously improved.
In some embodiments of the invention, the thickener is a mixture of hydroxypropyl methylcellulose ether and polyvinyl alcohol, optionally, the mass ratio of hydroxypropyl methylcellulose ether to polyvinyl alcohol is 1-2: 2. In the invention, the hydroxypropyl methyl cellulose ether can adjust the viscosity of the mortar, improve the bonding property of the polyphenyl particles and the cement paste and improve the structural deformation. The polyvinyl alcohol can adjust the viscosity of the mortar and the setting time of the mortar, so that the polyvinyl alcohol can be more flexibly utilized in engineering application.
In some embodiments of the present invention, the water reducing agent comprises any one of naphthalene series, aliphatic series and polycarboxylic acid series, and the water reducing rate is 25 to 35%. According to the invention, the water reducing agent can adjust the thixotropic property of the mortar, so that the extrusion property of the mortar is improved, and the 3D structure of the extruded mortar is stabilized.
The invention discloses a preparation method of the 3D printing thermal insulation mortar, which comprises the following steps:
(1) and uniformly mixing the white portland cement, the water-based tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand to obtain a mixture.
(2) And (2) sequentially adding water, a water reducing agent and vitrified micro bubbles into the mixture obtained in the step (1), uniformly stirring, adding polyphenyl granules, and uniformly stirring again to obtain the 3D printing thermal insulation mortar.
The third aspect of the invention discloses application of the 3D printing thermal insulation mortar in the field of building engineering.
Compared with the prior art, the invention has the following beneficial effects:
(1) the 3D printing thermal insulation mortar provided by the invention can control dynamic and static yield stress and structural deformation in the ranges of 432-878 Pa, 1316-1982 Pa and 4.7-9.4% respectively, so that the extrudability and the constructability of the 3D printing thermal insulation mortar can be obviously improved.
(2) The invention adopts white portland cement as a main cementing material and synergistically regulates the adhesive property and rheological property of the thermal mortar through the additive to meet the extrusion property requirement required by 3D printing. Meanwhile, the structural stability of the 3D printing thermal insulation mortar is improved by doping the nano clay material, so that the rheological property of the 3D printing thermal insulation mortar is controllable, the coloring is easy, and the mechanical property of the 3D printing thermal insulation mortar can be improved.
(3) The technical effects enable the 3D printing thermal insulation mortar to have good application prospects in the field of buildings.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described above, some existing thermal insulation mortars have poor rheological properties which are difficult to control and poor cohesiveness between organic and inorganic materials, so that the structural stability of the thermal insulation mortars after 3D printing is poor, and the thermal insulation mortars are difficult to apply to the 3D printing technology. Therefore, the invention provides the 3D printing thermal insulation mortar based on cement clinker particle components and the preparation method and the application thereof; the invention will now be further described with reference to specific embodiments.
First embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
60 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 92 and the model of 42.5;
0.5 part of water-based tackifying resin: the viscosity at 100rpm is 150-200 mPa.s, and the main component is rosin ester;
2 parts of nano montmorillonite: apparent density 1.91g/m3The content of montmorillonite is 96%, and the whiteness is 89;
6 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
5 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
1 part of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 1:2:2 in sequence;
0.3 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.3 part of polycarboxylic acid water reducing agent and 50 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer and mixing for 2 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 4min, then adding polyphenyl granules, and stirring again for 2min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (5) placing the 3D printing heat-preservation mortar blank in the step (4) into a curing box (with the temperature of 25 ℃ and the humidity of 95%) for curing for three days to obtain the 3D printing heat-preservation mortar.
Second embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
100 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 95 and the model number of 42.5;
1.5 parts of water-based tackifying resin: the viscosity at 100rpm is 150 mPas, and the main component is rosin ester;
3 parts of nano montmorillonite: apparent density 1.92g/m3The content of montmorillonite is 96 percent, and the whiteness is 91;
10 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
10 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
5 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 1:2:2 in sequence;
1 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.7 part of polycarboxylic acid water reducing agent and 70 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer, and mixing for 2.5 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 5min, then adding polyphenyl granules, and stirring again for 2min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Third embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
75 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 94 and the model number of 42.5;
1 part of water-based tackifying resin: the viscosity at 100rpm is 160 mPas, and the main component is rosin ester;
1 part of nano montmorillonite: apparent density 1.95g/m3The content of montmorillonite is 97%, and the whiteness is 89;
5 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
7 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
3 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 1:2:2 in sequence;
0.4 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.4 part of polycarboxylic acid water reducing agent and 60 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer, and mixing for 2.5 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 5min, then adding polyphenyl granules, and stirring again for 3min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Fourth embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
70 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 91 and the model number of 42.5;
1 part of water-based tackifying resin: the viscosity at 100rpm is 160 mPas, and the main component is rosin ester;
2 parts of nano montmorillonite: apparent density 1.91g/m3The content of montmorillonite is 96%, and the whiteness is 89;
7 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
7 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
2 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 1:2:2 in sequence;
0.3 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.3 part of polycarboxylic acid water reducing agent and 56 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer and mixing for 2 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 6min, then adding polyphenyl granules, and stirring again for 3min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Fifth embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
80 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 92 and the model number of 42.5;
1 part of water-based tackifying resin: the viscosity at 100rpm is 170 mPas, and the main component is rosin ester;
1.2 parts of nano montmorillonite: apparent density 1.91g/m3The content of montmorillonite is 96 percent, and the whiteness is 89 percent;
8 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
6 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 2:2:3 in sequence;
3 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 2:2:2 in sequence;
0.5 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.5 part of polycarboxylic acid water reducing agent and 60 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer and mixing for 2 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 6min, then adding polyphenyl granules, and stirring for 4min again to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Sixth embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
90 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 95 and the model number of 42.5;
1 part of water-based tackifying resin: the viscosity at 100rpm is 170 mPas, and the main component is rosin ester;
2.7 parts of nano montmorillonite: apparent density 1.91g/m3The content of montmorillonite is 96 percent, and the whiteness is 89 percent;
9 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 3:1:1 in sequence;
8 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
4 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 2:2:2 in sequence;
0.7 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.4 part of polycarboxylic acid water reducing agent and 68 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer and mixing for 2 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 7min, then adding polyphenyl granules, and stirring again for 3min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Seventh embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
78 parts of white portland cement with the particle size range of 0.5-89 mu m, the Hunter whiteness of 93 and the model number of 42.5;
1 part of water-based tackifying resin: the viscosity at 100rpm is 180 mPas, and the main component is rosin ester;
1.5 parts of nano montmorillonite: apparent density 1.91g/m3The content of montmorillonite is 96 percent, and the whiteness is 89 percent;
8 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
7 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
3 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 1:2:2 in sequence;
0.4 part of thickening agent: a mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol in a mass ratio of 2: 2;
0.35 part of polycarboxylic acid water reducing agent and 60 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer and mixing for 2 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 7min, then adding polyphenyl granules, and stirring again for 4min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Eighth embodiment
The preparation method of the 3D printing heat-preservation mortar comprises the following steps:
(1) preparing raw materials: weighing the following raw materials in parts by weight:
85 parts of white portland cement, wherein the particle size range is 0.5-89 mu m, the Hunter whiteness is 95, and the model number is 42.5;
1 part of water-based tackifying resin: the viscosity at 100rpm is 180 mPas, and the main component is rosin ester;
2.2 parts of nano montmorillonite: apparent density 1.91g/m3The content of montmorillonite is 96 percent, and the whiteness is 89 percent;
9 parts of polyphenyl particles: the particle size distribution comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm, and the mass ratio of the polyphenyl particles in the three gradients is 2:1:1 in sequence;
8 parts of quartz sand: the particle size distribution comprises three gradients of 1-80 μm, 80-200 μm and 200-500 μm, and the mass ratio of the three gradients of quartz sand is 1:2:3 in sequence;
4 parts of vitrified small balls: the particle size distribution comprises three gradients of 50-200 mu m, 200-400 mu m and 400-600 mu m, and the mass ratio of the vitrified micro bubbles of the three gradients is 1:2:2 in sequence;
0.6 part of thickening agent: the mixture of hydroxypropyl methyl cellulose ether and polyvinyl alcohol is formed according to the mass ratio of 1: 2;
0.4 part of polycarboxylic acid water reducing agent and 65 parts of water.
(2) And (2) adding the white portland cement, the aqueous tackifying resin, the thickening agent, the nano montmorillonite and the quartz sand in the step (1) into a V-shaped mixer and mixing for 2 hours to obtain a first mixture.
(3) Printing and forming: and (3) placing the first mixture obtained in the step (2) in a stirrer, then sequentially adding water, a water reducing agent and vitrified micro bubbles, stirring for 8min, then adding polyphenyl granules, and stirring again for 5min to obtain the thermal insulation mortar.
(4) And (4) placing the thermal insulation mortar obtained in the step (3) in a 3D printer (Power artist), and printing according to a preset cuboid model to obtain a 3D printing thermal insulation mortar blank.
(5) And (5) maintenance: and (3) placing the 3D printing heat-preservation mortar blank in the step (4) in a temperature range of 25 ℃ and a humidity range of 95% for curing for three days to obtain the 3D printing heat-preservation mortar.
Ninth embodiment
The preparation of the 3D printing thermal insulation mortar is similar to that of the first embodiment, except that no aqueous tackifying resin is added into the raw materials of the 3D printing thermal insulation mortar, and the addition amount of the white Portland cement is adjusted to 60.5 parts.
Tenth embodiment
The preparation of the 3D printing thermal insulation mortar is different from the second embodiment in that no aqueous tackifying resin is added into the raw materials of the 3D printing thermal insulation mortar, and the addition amount of the white Portland cement is adjusted to be 101.5 parts.
Eleventh embodiment
The preparation of the 3D printing thermal insulation mortar is different from the third embodiment in that nano montmorillonite is not added in the raw materials of the 3D printing thermal insulation mortar, and the addition amount of white portland cement is adjusted to 76 parts.
Twelfth embodiment
The preparation of the 3D printing thermal insulation mortar is different from the fourth embodiment in that nano montmorillonite is not added in the raw materials of the 3D printing thermal insulation mortar, and the addition amount of white portland cement is adjusted to 72 parts.
Thirteenth embodiment
The preparation of the 3D printing thermal insulation mortar is similar to that of the sixth embodiment, except that no vitrified micro bubbles are added in the raw materials of the 3D printing thermal insulation mortar, and the addition amount of the white Portland cement is adjusted to 94 parts.
Fourteenth embodiment
The preparation of the 3D printing thermal insulation mortar is similar to that of the seventh embodiment, except that no thickener is added to the raw materials of the 3D printing thermal insulation mortar, and the addition amount of the white Portland cement is adjusted to 78.4 parts.
Fifteenth embodiment
The preparation of the 3D printing thermal insulation mortar is different from the eighth embodiment in that no thickener is added to the raw materials of the 3D printing thermal insulation mortar, and the addition amount of the white Portland cement is adjusted to 85.6 parts.
Sixteenth embodiment
The preparation method of the 3D printing thermal insulation mortar is the same as that of the first embodiment, and is different from the first embodiment in that in the raw materials of the 3D printing thermal insulation mortar, the granularity of polyphenyl particles is in single gradation and is 0.5-2 mm.
Seventeenth embodiment
The preparation method of the 3D printing thermal insulation mortar is the same as that of the first embodiment, and is different from the first embodiment in that in the raw materials of the 3D printing thermal insulation mortar, the granularity of polyphenyl particles is in single gradation and is 5-6 mm.
Eighteenth embodiment
The preparation method of the 3D printing thermal insulation mortar is similar to that of the first embodiment, and is different from the first embodiment in that in the raw materials of the 3D printing thermal insulation mortar, the granularity of quartz sand is in single gradation and is 1-80 μm.
Nineteenth embodiment
The preparation method of the 3D printing thermal insulation mortar is different from the first embodiment in that in the raw materials of the 3D printing thermal insulation mortar, the granularity of quartz sand is in single gradation and is 200-500 mu m.
Twentieth embodiment
The preparation method of the 3D printing thermal insulation mortar is different from the first embodiment in that in the raw materials of the 3D printing thermal insulation mortar, the particle size of vitrified micro bubbles is in single gradation and is 50-200 mu m.
Twenty-first embodiment
The preparation method of the 3D printing thermal insulation mortar is different from the first embodiment in that in the raw materials of the 3D printing thermal insulation mortar, the granularity of the vitrified micro bubbles is in single gradation and is between 400 and 600 mu m.
Effect testing
The performance indexes of the 3D printing thermal insulation mortar prepared by the embodiment of the invention are tested, and the specific method comprises the following steps:
(1) compressive and flexural strength was measured using a U.S. MTS Universal tester.
(2) Rheological properties testing (yield stress, thixotropy and viscoelasticity) results from rotational rheometry of mark 40, haake, germany.
(3) The extrusion performance test method comprises the following steps: the prepared 3D printing thermal insulation mortar is placed in a 3D printer charging bucket, a 3D printer is used for continuously extruding under the constant air pump pressure (0.3MPa), and the average width of a single-row (three-point) printing path is tested.
(4) The deformation rate testing method comprises the following steps: average of the ratio of the final three-directional dimensions of the sample after 3D printing to the model dimensions.
The test results are shown in table 1.
TABLE 1
As can be seen from table 1: the 3D printing thermal insulation mortar material can simultaneously control the extrusion performance, the dynamic yield stress, the static yield stress, the 3D compressive strength and the 3D flexural strength to be within the ranges of 3.1-3.9 mm, 312-423 Pa, 421-647 Pa, 1.0-2.7 MPa and 0.8-2.3 MPa respectively. When the dynamic and static yield stresses are more than 413 and 609Pa, the structural deformation rate of the printed slurry can be controlled below 10%, and the stable control of the 3D printing structure can be realized. Moreover, the performances of the first to eighth embodiments are significantly better than those of the ninth to twenty-first embodiments, which shows that the components thereof synergistically improve the performances of the mortar material by adding the admixture.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The 3D printing thermal insulation mortar is characterized by comprising the following raw materials in parts by weight: 60-100 parts of white portland cement, 0.5-1.5 parts of water-based tackifying resin, 1-3 parts of nano montmorillonite, 5-10 parts of polyphenyl particles, 5-10 parts of quartz sand, 1-5 parts of vitrified micro bubbles, 0.3-1 part of thickening agent, 0.3-0.7 part of water reducing agent and 50-70 parts of water.
2. The 3D printing thermal insulation mortar of claim 1, wherein the 3D printing thermal insulation mortar comprises the following raw materials in percentage by weight: 70-90 parts of white portland cement, 0.8-1.2 parts of water-based tackifying resin, 1.2-2.7 parts of nano montmorillonite, 7-9 parts of polyphenyl particles, 6-8 parts of quartz sand, 2-4 parts of vitrified micro bubbles, 0.3-0.7 part of thickening agent, 0.3-0.5 part of water reducing agent and 56-68 parts of water.
3. The 3D printing thermal insulation mortar of claim 1, wherein the 3D printing thermal insulation mortar comprises the following raw materials in percentage by weight: 78-85 parts of white portland cement, 1-1.2 parts of aqueous tackifying resin, 1.5-2.2 parts of nano montmorillonite, 8-9 parts of polyphenyl granules, 7-8 parts of quartz sand, 3-4 parts of vitrified micro bubbles, 0.4-0.6 part of thickening agent, 0.35-0.4 part of water reducing agent and 60-65 parts of water.
4. The 3D printing thermal mortar according to any one of claims 1 to 3, wherein the particle size distribution of the polyphenyl particles comprises three gradients of 0.5-2 mm, 2-4 mm and 5-6 mm; preferably, the mass ratio of the three gradient polyphenyl particles is 2-3: 1:1 in sequence.
5. The 3D printing thermal mortar according to any one of claims 1 to 3, wherein the grain size distribution of the quartz sand comprises three gradients of 1 to 80 μm, 80 to 200 μm and 200 to 500 μm; preferably, the mass ratio of the three gradient quartz sands is 1-2: 2:3 in sequence.
6. The 3D printing thermal mortar according to any one of claims 1 to 3, wherein the grain size distribution of the vitrified micro bubbles comprises three gradients of 50 to 200 μm, 200 to 400 μm and 400 to 600 μm; preferably, the mass ratio of the three gradient vitrified micro bubbles is 1-2: 2:2 in sequence.
7. The 3D printing thermal mortar of any one of claims 1-3, wherein the thickener is a mixture of hydroxypropyl methylcellulose ether and polyvinyl alcohol, preferably the mass ratio of hydroxypropyl methylcellulose ether to polyvinyl alcohol is 1-2: 2.
8. The 3D printing thermal mortar according to any one of claims 1 to 3, wherein the white portland cement has a particle size ranging from 0.5 to 89 μm and a Hunter whiteness ranging from 91 to 95;
or the viscosity of the aqueous tackifying resin is 150-200 mPa & s, and the main component of the aqueous tackifying resin is rosin ester;
or the apparent density of the nano montmorillonite is 1.91-1.95 g/m3The content of montmorillonite is not less than 96%, and the whiteness is 89-91;
or the water reducing agent comprises any one of naphthalene series, aliphatic series and polycarboxylic acid series, and the water reducing rate is 25-35%.
9. The preparation method of the 3D printing thermal mortar according to any one of claims 1 to 8, characterized by comprising the following steps:
(1) uniformly mixing white portland cement, aqueous tackifying resin, a thickening agent, nano montmorillonite and quartz sand to obtain a mixture;
(2) and (2) sequentially adding water, a water reducing agent and vitrified micro bubbles into the mixture obtained in the step (1), uniformly stirring, adding polyphenyl granules, and uniformly stirring again to obtain the 3D printing thermal insulation mortar.
10. Use of the 3D printing thermal mortar according to any one of claims 1 to 8 and/or the 3D printing thermal mortar prepared by the method according to claim 9 in the field of construction engineering.
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