CN109020369A - A kind of concrete material and preparation method for 3D printing - Google Patents
A kind of concrete material and preparation method for 3D printing Download PDFInfo
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- CN109020369A CN109020369A CN201810913908.XA CN201810913908A CN109020369A CN 109020369 A CN109020369 A CN 109020369A CN 201810913908 A CN201810913908 A CN 201810913908A CN 109020369 A CN109020369 A CN 109020369A
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- concrete material
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- filmogen
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Classifications
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- 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
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/001—Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material
-
- 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
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
- C04B41/48—Macromolecular compounds
- C04B41/488—Other macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/60—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only artificial stone
- C04B41/61—Coating or impregnation
- C04B41/62—Coating or impregnation with organic materials
- C04B41/63—Macromolecular compounds
Abstract
The present invention provides a kind of concrete material and preparation method thereof for 3D printing.The present invention further provides the preparation method and applications of above-mentioned concrete material.The present invention further provides a kind of coagulation local soil type condensation material for 3D printing, concrete component and preparation method thereof.A kind of concrete material and preparation method for 3D printing provided by the invention, it is formed based on the 3D printing concrete material system under " material lift-interface modification-entirety enhancing " theory, it improves 3D printing concrete material and prepares the overall performance of component, with excellent mechanical property and durability, the service life of 3D printing material can be promoted, facilitate construction, promotes 3D printing concrete structure and building to promote in practical projects, engineering application value and social benefit with higher.
Description
Technical field
The invention belongs to civil engineering material technical fields, are related to a kind of for the concrete material of 3D printing and preparation side
A kind of method, and in particular to concrete material, coagulation local soil type condensation material, concrete component and preparation method thereof for 3D printing.
Background technique
As industrial technology develops, the more and more extensive various industries applied to national economy of 3D printing technique.Closely
A little years, 3D printing technique have been used in building trade, using concrete as 3D printing " ink ", can print out shape and structure
The different building element of form, the computer programming and digitlization construction of overall process, realizes the reasonable system of building, structure and construction
One.In recent years, there are large quantities of 3D printing coagulations on Holland, the United Arab Emirates and the ground such as China Shanghai and Beijing
Native exemplary building, and form small-scale industrialization production and popularization.With the transition and upgrade of building trade, 3D printing is mixed
Solidifying civil engineering builds mechanization degree with higher, is the industrialization of future architecture industry and digitized inevitable development trend.
But the peculiar problem of 3D printing concrete material exposure also gradually causes the concern of domestic and foreign scholars, it is main
Engineering challenge is the 3D printing for carrying out building structure as " ink " using concrete, " ink " material property used is low,
" ink " type slug interband formed interface layer adhesion strength is low and the poor and apparent bumps of overall performance of 3D printing product
Injustice, these reduce 3D printing concrete material and prepare the safety and applicability of component, significantly limit 3D
Print popularization and application of the concrete in building structure.Particularly, previous studies have shown that due to 3D printing " ink " interlaminar bonding
Intensity is lower, and shear behavior is poor, and it is 3D printing concrete at this stage that easily recurring structure, which destroys, under earthquake or shear load effect
Material and the insurmountable important problem of technology of preparing.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of concrete for 3D printing
Material and preparation method fundamentally solve application of traditional 3D printing concrete material in engineering as 3D printing ink
Problem, simultaneously because the modification and promotion of material property, interface performance and overall performance, make 3D printing building structure by traditional
Brittle break is changed into ductile fracture, has been obviously improved the safety of 3D printing building structure.
In order to achieve the above objects and other related objects, first aspect present invention provides a kind of concrete for 3D printing
Material, in parts by weight, including following components:
Cementitious material: 1.0 parts；
Natural fine aggregate: 0.2-4.0 parts；
Nano silica: 0.001-0.03 parts；
High-elastic mode polyethylene fiber: 0.005-0.05 parts；
Redispersable latex powder: 0.001-0.05 parts；
Cellulose: 0.0001-0.002 parts；
Water: 0.2-0.6 parts；
Thickening water-reducing agent: 0.003-0.02 parts.
Preferably, a kind of concrete material for 3D printing, in parts by weight, including following components:
Cementitious material: 1.0 parts；
Natural fine aggregate: 0.5-3.0 parts；
Nano silica: 0.005-0.02 parts；
High-elastic mode polyethylene fiber: 0.01-0.04 parts；
Redispersable latex powder: 0.005-0.02 parts；
Cellulose: 0.0005-0.0015 parts；
Water: 0.25-0.40 parts；
Thickening water-reducing agent: 0.005-0.015 parts.
It is highly preferred that a kind of concrete material for 3D printing, in parts by weight, including following components:
Cementitious material: 1.0 parts；
Natural fine aggregate: 1.5-2.5 parts；
Nano silica: 0.01-0.015 parts；
High-elastic mode polyethylene fiber: 0.02-0.03 parts；
Redispersable latex powder: 0.008-0.012 parts；
Cellulose: 0.0008-0.0010 parts；
Water: 0.30-0.35 parts；
Thickening water-reducing agent: 0.008-0.012 parts.
Preferably, 3D printing is carried out after the concrete material metering mix and form multiple coagulation local soil type condensation materials, at least
It is bonded between partial the multiple coagulation local soil type condensation material by mucilage materials, it is at least part of the multiple mixed after bonding
The outer surface of solidifying local soil type's condensation material forms cured film by filmogen.
It is highly preferred that the bonding of the mucilage materials is with a thickness of 0.1-5.0mm.It is further preferred that the mucilage materials
Bonding with a thickness of 0.2-3.0mm.Most preferably, the bonding of the mucilage materials is with a thickness of 0.5-1.5mm.
It is highly preferred that the bonding mode of the mucilage materials is selected from one of spraying method or brushing mode.
It is highly preferred that the film forming thickness of the filmogen is 0.1-10mm.It is further preferred that the filmogen
Film forming thickness is 0.5-5.0mm.Most preferably, the film forming thickness of the filmogen is 2.0-3.0mm.
It is highly preferred that the thin film-forming method of the filmogen is selected from one of spraying method or brushing mode.
It is highly preferred that the mucilage materials are hot melt epoxy resin viscose glue.The hot melt epoxy resin viscose glue conduct
Construction structure glue uses, adhesion strength with higher, the adhesion strength that can be obviously improved between cementitious material interface.It is further excellent
Selection of land, the hot melt epoxy resin viscose glue are selected from polycondensation product, epoxychloropropane and the polyalcohol of epoxychloropropane and bisphenol-A
One of polycondensation product.It is further preferred that the hot melt epoxy resin viscose glue is selected from bisphenol-A and epoxy chloropropionate
One of alkane, the polymer of phenol and formaldehyde, bis-phenol A glycidyl ether.
The chemical formula of the bisphenol-A and the polymer of epoxychloropropane, phenol and formaldehyde is
(C15H16O2.C6H6O.C3H5ClO.CH2O) x, No. CAS is 40216-08-8.No. CAS of the bis-phenol A glycidyl ether be
1675-54-3。
It is highly preferred that the filmogen is isocyanates-amido film forming agent.Specifically, the isocyanates-amido
Film forming agent is conventional use of isocyanates-amido film forming agent, commercially available acquisition.Isocyanates-the amido at
Film is bi-component film-forming material, and bi-component sprays film forming simultaneously.It has excellent power as functional form filmogen
Performance, especially higher tensile strength are learned, while having both preferable appearance beautifying functions, it can be according to actual needs by mixing
The dyestuff for entering different colours sprays out the functional coating of different color.
It is further preferred that the isocyanates-amido film forming agent is polyureas.The polyureas be by isocyanate component with
A kind of elastomer substances that the reaction of amino-compound component generates have anti-solidification enhancing and antisepsis, take into account beauty.It is specific next
It says, the isocyanates-amido film forming agent is that the GB805A-100 type produced by Zhuhai Feiyang Novel Material Co., Ltd. gathers
Urea.
It is highly preferred that tensile strength >=30MPa of the filmogen.
Preferably, the cementitious material is the mixture of cement and flyash, wherein the mass ratio of cement and flyash
For 1:0.5-1:2.It is highly preferred that the mass ratio of the cement and flyash is 1:0.8-1:1.2.
It is highly preferred that any one of the cement in portland cement or ordinary portland cement.It is described common
Portland cement is the levigate manufactured cement of mixing material, proper amount of gypsum that 6-20% is added in Portland clinker.Institute
Ordinary portland cement is stated because mixed mixing material is less, ingredient and portland cement relatively, so the two
Performance relatively, can also replace under certain conditions, and will such as seek quickness hard, high-strength concrete, and ordinary priority uses silicon
Acid salt cement, can also be used ordinary portland cement, and the scope of application of ordinary portland cement is more extensive.
It is highly preferred that strength grade >=32.5 grade of the cement.It is further preferred that the strength grade of the cement is
42.5 grades.
It is highly preferred that the classification grade of the flyash is not less than II grades of flyash.It is further preferred that the flyash
Classification grade be I grades of flyash.
The flyash is that fine ash is collected from the flue gas after coal combustion, is the main of coal-burning power plant's discharge in China
Solid waste, main oxides composition are as follows: SiO2、Al2O3、FeO、Fe2O3、CaO、TiO2Deng.It is according to quality grade compartmentalization
I grades of flyash, II grades of flyash and III level flyash can be divided into.
Preferably, the natural fine aggregate is the continuous grading natural river sand of partial size 0.15-5mm.
It is highly preferred that the natural fine aggregate is the continuous grading natural river sand of partial size 0.5-2mm.
Preferably, the nano silica (SiO2) particle size range be 1-100nm.The nano silica is white
Color powder.It is highly preferred that the particle size range of the nano silica is 1-50nm.
Preferably, the elasticity modulus of the high-elastic mode polyethylene fiber is 91-140N/tex.
Preferably, the length range of the high-elastic mode polyethylene fiber is 1.5-50.0mm.
It is highly preferred that the length range of the high-elastic mode polyethylene fiber is 3-30mm.
It is further preferred that the length range of the high-elastic mode polyethylene fiber is 3-15mm.
Preferably, the redispersable latex powder is conventional use of redispersable latex powder, commercially available to obtain
?.
It is highly preferred that the redispersable latex powder is selected from copolymerization rubber powder, ethylene and the chloroethene of vinyl acetate and ethylene
Alkene and vinyl laurate vinegar ternary polymerization powder, vinyl acetate and ethylene and higher fatty acids ethylene rouge ternary polymerization powder, acetic acid
It is a kind of in hexenoic acid homopolymerization rubber powder, styrene and butadiene copolymer rubber powder.
Preferably, the cellulose is selected from one of hydroxypropyl methyl cellulose or lignocellulosic.The cellulose
It can guarantee that the concrete material prepared in the present invention has good working performance and good appearance property if do not cracked.
Preferably, the water is tap water.
Preferably, the thickening water-reducing agent is polycarboxylic acids and water-soluble cellulose ether compound additive.The polycarboxylic acids and
Water-soluble cellulose ether compound additive be conventional use of polycarboxylic acids and water-soluble cellulose ether compound additive, can be from market
Upper purchase obtains.Specifically, the polycarboxylic acids and water-soluble cellulose ether compound additive are by Jiangsu Su Bote new material
Co., Ltd's productionType III additive.
Second aspect of the present invention provides a kind of preparation method of concrete material for 3D printing, is by above-mentioned concrete
The formula rate of material carries out each component after metering stirring to obtain the final product.
Preferably, the preparation method of a kind of concrete material for 3D printing, comprising the following steps:
1) formula rate of concrete material is pressed, metering takes cementitious material, natural fine aggregate, nano silica, high-elastic
Mode polyethylene fiber, redispersable latex powder and cellulose carry out first time stirring, obtain pre- mixture；
2) press the formula rate of concrete material, metering water intaking with thicken after water-reducing agent is stirred and mixes, mixed
Material；
3) mixture in step 2) is added in the pre- mixture in step 1) again and carries out second of stirring, obtained most
Whole mixture, as required to 3D printing concrete material.
Preferably, in step 1), the time of the first time stirring is 1-3 minutes.It is highly preferred that the first time stirring
Mixing time be 2 minutes.
Preferably, in step 2), the time being stirred is 1-3 minutes.It is highly preferred that it is described be stirred when
Between be 2 minutes.
Preferably, in step 3), time >=2 minute of second of stirring.It is highly preferred that second of stirring
Mixing time is 3 minutes.
Preferably, step 1) or 3) in, first time stirring and stir the blender used for the second time, for routine use
Machine mixer, commercially available acquisition.The blender can be attached in 3D printer, as one in its system
Point.
Preferably, in step 3), the slump of the final mixture is 5-100mm.It is highly preferred that the final mix
The slump of object is 10-80mm.It is further preferred that the slump of the final mixture is 30-50mm.
The concrete material for 3D printing is in paste, and slump should not be too large, and answer consistency with higher, just
In construction.
Third aspect present invention provides a kind of purposes of above-mentioned concrete material in the concrete material as 3D printing.
Preferably, the purposes combines the concrete component to form 3D printing for the concrete material as 3D printing.
Fourth aspect present invention provides a kind of coagulation local soil type condensation material for 3D printing, is measured by the concrete material
3D printing is carried out after mix to be formed.The coagulation local soil type condensation material of the 3D printing be the multiple and different shapes formed through 3D printing and
The concrete material of structure.
Preferably, the 3D printing is successively printed using 3D printer according to the program specifically set.
Fifth aspect present invention provides a kind of concrete component for 3D printing, includes mucilage materials, filmogen
It with multiple coagulation local soil type condensation materials, is bonded between at least part of the multiple coagulation local soil type condensation material, is glued by mucilage materials
The outer surface of at least part of the multiple coagulation local soil type condensation material after knot forms cured film by filmogen.
Preferably, the bonding of the mucilage materials is with a thickness of 0.1-5.0mm.It is highly preferred that the bonding of the mucilage materials
With a thickness of 0.2-3.0mm.It is further preferred that the bonding of the mucilage materials is with a thickness of 0.5-1.5mm.
Preferably, the mucilage materials are hot melt epoxy resin viscose glue.
It is highly preferred that the hot melt epoxy resin viscose glue is selected from polycondensation product, the epoxy chlorine of epoxychloropropane and bisphenol-A
One of propane and the polycondensation product of polyalcohol.
It is further preferred that the hot melt epoxy resin viscose glue is selected from bisphenol-A and epoxychloropropane, phenol and formaldehyde
One of polymer, bis-phenol A glycidyl ether.
Preferably, the film forming thickness of the filmogen is 0.1-10mm.It is highly preferred that the filmogen at film thickness
Degree is 0.5-5.0mm.It is further preferred that the film forming thickness of the filmogen is 2.0-3.0mm.
Preferably, the filmogen is isocyanates-amido film forming agent.It is highly preferred that isocyanates-the amido at
Film is polyureas.
Preferably, tensile strength >=30MPa of the filmogen.
Sixth aspect present invention provides a kind of preparation method of concrete component for 3D printing, comprising the following steps:
1) coagulation local soil type condensation material is bonded by mucilage materials；
2) outer surface of the coagulation local soil type condensation material by filmogen after bonding carries out film forming solidification.
Preferably, first coagulation local soil type condensation material 3D printing in step 1), in the adjacent coagulation local soil type condensation material
Afterwards, the 3-7s before second coagulation local soil type condensation material 3D printing leads on the contact interface between two coagulation local soil type condensation materials
The mucilage materials are crossed to be bonded.It keeps thickness uniform when the mucilage materials bond, there is preferable normal temperature cure characteristic,
To promote interfacial bond property.
Preferably, in step 1), the bonding mode of the mucilage materials is spraying method.
It is highly preferred that the spraying method is tied selected from one or both of hand spray mode or mechanically spraying mode
It closes.
Further, the spraying method of the mucilage materials is mechanically spraying mode.The mechanically spraying mode can be used as
3D printing equipment a part, is accurately controlled by computer.
Preferably, in step 1), the initial setting time of the bonding is 1-5min, and it is 22-26h that the time, which is fully cured,.
Preferably, in step 1), the construction temperature of the mucilage materials bonding is not less than 5 DEG C, and relative humidity is not less than
30%.
It is highly preferred that the construction temperature of the mucilage materials bonding is not less than 10 DEG C, relative humidity is not less than 50%.
It is further preferred that the construction temperature of the mucilage materials bonding is not less than 20 DEG C, relative humidity is not less than 60%.
Preferably, the coagulation local soil type condensation material in step 2), before the filmogen carries out film forming solidification, after removing bonding
Sundries on outer surface carries out striking off processing to the Combined concrete outer surface after bonding.It is described to strike off processing and make to bond
The male and fomale(M&F) of Combined concrete outer surface afterwards is smooth, if there is obvious shortcoming that can carry out small-scale operation of manually filling a vacancy,
The defects of such as filling up the honeycomb and hole in the Combined concrete outer surface after bonding.
Preferably, in step 2), the thin film-forming method of the filmogen is selected from one of spraying method or brushing mode.
It is highly preferred that the spraying method is tied selected from one or both of hand spray mode or mechanically spraying mode
It closes.
Further, the spraying method is mechanically spraying mode.The mechanically spraying mode can be used as 3D printing equipment
A part is accurately controlled by computer.
It is tied it is highly preferred that the brushing mode is selected from artificial one or both of the mode or mechanical brushing mode of brushing
It closes.
Further, the brushing mode is mechanical brushing mode.The machinery brushing mode can be used as 3D printing equipment
A part is accurately controlled by computer.
Preferably, in step 2), the thin film-forming method of the filmogen is secondary or multiple thin film-forming method.
It is highly preferred that the thin film-forming method of the filmogen is secondary film-forming mode, in the secondary film-forming mode, in head
It carries out forming a film for second after secondary film forming 18-30h.
It is further preferred that carrying out forming a film for second afterwards for 24 hours forming a film for the first time in the secondary film-forming mode.
Preferably, in step 2), the film forming cured time is≤45min.
Preferably, in step 2), the film forming construction temperature of the filmogen is not less than 5 DEG C, and relative humidity is not less than
30%.
It is highly preferred that the film forming construction temperature of the filmogen is not less than 10 DEG C, relative humidity is not less than 50%.
It is further preferred that the film forming construction temperature of the filmogen is not less than 20 DEG C, relative humidity is not less than 60%.
Preferably, in step 2), the curing temperature of the concrete component after solidifying that forms a film conserves age not less than 5 DEG C
Phase is not less than 14 days.
It is highly preferred that the curing temperature of the concrete component after solidifying that forms a film is 20 ± 2 DEG C, curing age 28
It.
Preferably, in step 2), the maintenance humidity (relative humidity) >=60% of the concrete component after solidifying that forms a film.
It is highly preferred that the maintenance humidity (relative humidity) >=95% of the concrete component after solidifying that forms a film.
As described above, a kind of concrete material and preparation method for 3D printing provided by the invention, passes through cement base
Cementitious material composite Nano SiO2With high-elastic mode polyethylene fiber, high-quality 3D printing " ink " is prepared；In conjunction with hot melt ring
Oxygen resin Adhesive modifiers boundary material improves the globality of 3D printing concrete material and component；Finally use isocyanates-ammonia
Based compound spraying film forming, obtains the 3D printing concrete component for haveing excellent performance while having both aesthetic effect, is formed and be based on " material
3D printing concrete material system under promotion-interface modification-entirety enhancing " theory.It has the advantages that
(1) a kind of concrete material and preparation method for 3D printing provided by the invention, inherently changes 3D
The low-quality of build concrete material is printed, the micropore structure of material is improved by mixing nano material, realizes power
Learn the promotion of performance；Mix high-elastic mode polyethylene fiber material improve material plasticity and toughness, especially stretch bending strength and
Shearing strength is obviously improved, and the material under loaded effect is made to become plastic failure from brittle break, improves material property safety
Degree.
(2) a kind of concrete material and preparation method for 3D printing provided by the invention, breaches traditional 3D printing
The engineering technology bottleneck of the interface performance difference of concrete material utilizes the strong cohesive property of epoxy resin viscose glue, high adhesion, excellent
Mechanical property and endurance quality, be obviously improved the interface binding intensity of various combination storeroom, angle improves from interface
3D printing concrete material and the overall performance for preparing component.
(3) a kind of concrete material and preparation method for 3D printing provided by the invention, utilizes functional membrane structure
3D printing material preparation component surface is sprayed, one side high-strength functional membrane structure can promote 3D printing component
Overall performance, especially shearing resistance and bending strength guarantee component safety still with higher under seismic loading；It is another
It is apparent that aspect functionality film-forming process can improve 3D printing concrete, and it is concave-convex to solve previous 3D printing surface of concrete
Uneven technical problem；Finally, due to which the impermeability of functional filmogen, provides interior during concrete material maintenance
Care environments improve the overall quality of concrete material, and the overall performance for realizing 3D printing building structure is promoted and appearance
Beautification decreases the intrusion of water and corrosive medium during being on active service in the later period, has excellent endurance quality, Ke Yiti
Rise the service life of 3D printing material.
(4) a kind of concrete material and preparation method for 3D printing provided by the invention, fundamentally solves biography
Application problem in 3D printing concrete material engineering of uniting, the present invention are promoted from material quality, and interface performance is modified, and whole
The aspect of performance enhancement three has systematically realized the performance optimization of 3D printing concrete material, make 3D printing building structure by
Traditional brittle break is changed into ductile fracture, has been obviously improved the safety of 3D printing building structure；And it proposes matched
Preparation method has preparation simply, easy for construction, prepares the overall merit of excellent product performance, it is mixed can be obviously improved 3D printing
The application of Xtah Crude Clay structure and building in practical projects, engineering application value and social benefit with higher.
Specific embodiment
The present invention is further explained combined with specific embodiments below, it should be appreciated that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
It should be clear that in the following example not specifically dated process equipment or device be all made of conventional equipment in the art or
Device；All pressure values and range all refer to relative pressure.
In addition, it should also be understood that, one or more method and step mentioned in the present invention does not repel before and after the combination step
It can also be inserted into other methods step there may also be other methods step or between these explicitly mentioned steps, unless separately
It is described；It should also be understood that the combination connection relationship between one or more equipment/device mentioned in the present invention is not repelled
The two equipment/devices specifically mentioned before and after the unit equipment/device there may also be other equipment/device or at these it
Between can also be inserted into other equipment/device, unless otherwise indicated.Moreover, unless otherwise indicated, the number of various method steps is only
Identify the convenient tool of various method steps, rather than for the arrangement order of limitation various method steps or limits the enforceable model of the present invention
It encloses, relativeness is altered or modified, and without material changes in technical content, when being also considered as, the present invention is enforceable
Scope.
Preparation process of one of the present invention for the concrete component of 3D printing is as follows:
By the formula rate of concrete material, metering takes 1.0 parts of cementitious material, fine aggregate 0.2-4.0 parts natural, nanometer two
0.001-0.03 parts of silica, it is mode polyethylene fiber 0.005-0.05 parts high-elastic, 0.001-0.05 parts of redispersable latex powder, it is fine
Tie up 0.0001-0.002 parts of element；Stirring 1-3 minutes for the first time are carried out, pre- mixture is obtained.Wherein, preferred embodiment is cementitious material
1.0 parts, fine aggregate 0.5-3.0 parts natural, 0.005-0.02 parts of nano silica, high-elastic mode polyethylene fiber 0.01-0.04
Part, 0.005-0.02 parts of redispersable latex powder, 0.0005-0.0015 parts of cellulose.Most preferably scheme is cementitious material 1.0
Part, fine aggregate 1.5-2.5 parts natural, 0.01-0.015 parts of nano silica, it is mode polyethylene fiber 0.02-0.03 parts high-elastic,
0.008-0.012 parts of redispersable latex powder, 0.0008-0.0010 parts of cellulose.
0.2-0.6 parts of water intaking is measured simultaneously, water-reducing agent 0.003-0.02 parts of thickening is stirred mixing 1-3 minutes, acquisition
Mixture.Wherein, preferred embodiment is water 0.25-0.40 parts, thickens water-reducing agent 0.005-0.015 parts.Most preferably scheme is water
0.30-0.35 parts, water-reducing agent 0.008-0.012 parts of thickening.
It is added mixture into pre- mixture again and carries out second of stirring >=2 minutes, obtained final mixture, finally mix
The slump for closing object is 5-100mm, preferably 10-80mm, preferably 30-50mm.Up to required to 3D printing concrete
Material sample.
Wherein, cementitious material is the mixture of cement and flyash, and the mass ratio of cement and flyash is 1:0.5-1:
2, preferably 1:0.8-1:1.2.Any one of cement in portland cement or ordinary portland cement, the intensity of cement
Grade >=32.5 grade.The classification grade of flyash is not less than II grades of flyash.Natural fine aggregate is the continuous of partial size 0.15-5mm
Gradation natural river sand, partial size are preferably 0.5-2mm.The particle size range of nano silica is 1-100nm, preferably 1-50nm.
The elasticity modulus of high-elastic mode polyethylene fiber is 91-140N/tex.The length range of high-elastic mode polyethylene fiber is 1.5-
50.0mm, preferably 3-30mm.Redispersable latex powder is selected from copolymerization rubber powder, ethylene and the vinyl chloride of vinyl acetate and ethylene
And vinyl laurate vinegar ternary polymerization powder, vinyl acetate and ethylene and higher fatty acids ethylene rouge ternary polymerization powder, acetic acid second
It is a kind of in olefin(e) acid homopolymerization rubber powder, styrene and butadiene copolymer rubber powder.The cellulose is selected from hydroxypropyl methyl cellulose or wood
One of matter cellulose.Water is tap water.Thickening water-reducing agent is polycarboxylic acids and water-soluble cellulose ether compound additive.
The concrete material sample that will be prepared again is successively beaten using 3D printer according to the program specifically set
Print, forms multiple Combined concrete material samples.Wherein, first coagulation local soil type in adjacent concrete combined material sample
After condensation material sample 3D printing, the 3-7s before second Combined concrete material sample 3D printing, in two Combined concrete materials
Expect to carry out adhesive solidification by mucilage materials on the contact interface between sample, repeat the above steps, thus by multiple concrete
Combined material sample cohesive is together.Wherein, mucilage materials are hot melt epoxy resin viscose glue, the choosing of hot melt epoxy resin viscose glue
From one of the polycondensation product of epoxychloropropane and bisphenol-A, epoxychloropropane and polycondensation product of polyalcohol.Specifically,
Hot melt epoxy resin viscose glue is in bisphenol-A and epoxychloropropane, the polymer of phenol and formaldehyde, bis-phenol A glycidyl ether
One kind.For the bonding of mucilage materials with a thickness of 0.1-5.0mm, preferably 0.2-3.0mm, optimal is 0.5-1.5mm.Mucilage materials
Bonding mode be spraying method, spraying method be selected from one or both of hand spray mode or mechanically spraying mode knot
It closes, preferably mechanically spraying mode.The construction temperature of mucilage materials bonding is not less than 5 DEG C, optimal to be preferably not less than 10 DEG C
Not less than 20 DEG C.Mucilage materials bonding relative humidity be not less than 30%, preferably be not less than 50%, it is optimal for not less than
60%.The initial setting time of bonding is 1-5min, and it is 22-26h that the time, which is fully cured,.
Then by multiple Combined concrete material samples after the bonding prepared, the sundries on outer surface is removed, it is right
Outer surface carries out striking off processing, and the male and fomale(M&F) of the outer surface of multiple Combined concrete material samples after making bonding is smooth, if having
Obvious shortcoming can carry out small-scale operation of manually filling a vacancy, multiple Combined concrete material samples outer surface after such as filling up bonding
On honeycomb and hole the defects of.Pass through filmogen on the outer surface of multiple Combined concrete material samples after bonding again
Film forming solidification is carried out, to form the final required concrete component sample for 3D printing.Wherein, filmogen is isocyanide
Acid esters-amido film forming agent, isocyanates-amido film forming agent are polyureas.Tensile strength >=30MPa of filmogen.Filmogen
Film forming thickness be 0.1-10mm, preferably 0.5-5.0mm, it is optimal be 2.0-3.0mm.The thin film-forming method of filmogen is selected from spray
One of painting mode or brushing mode, spraying method are selected from one or both of hand spray mode or mechanically spraying mode
In conjunction with preferably mechanically spraying mode；Brushing mode is selected from one or both of artificial brushing mode or mechanical brushing mode
In conjunction with preferably mechanical brushing mode.It uses secondary or multiple thin film-forming method, when using secondary film-forming mode, for the first time at
It carries out forming a film for second after film 18-30h.The construction temperature of filmogen film forming is not less than 5 DEG C, is preferably not less than 10 DEG C, most
Excellent is not less than 20 DEG C.Filmogen film forming relative humidity be not less than 30%, preferably be not less than 50%, it is optimal for not less than
60%.The cured time form a film as≤45min.The curing temperature of the concrete component sample to form a film after solidifying is excellent not less than 5 DEG C
It is selected as 20 ± 2 DEG C；Curing age is not less than 14 days, preferably 28 days.The maintenance humidity (relative humidity) of concrete component sample
It is >=60%, preferably >=95%.
Embodiment 1
By the formula rate of concrete material, metering takes 1.0 parts of cementitious material, 2.0 parts of natural fine aggregate, nanometer titanium dioxide
0.012 part of silicon, 0.025 part of high-elastic mode polyethylene fiber, 0.01 part of redispersable latex powder, 0.0005 part of lignocellulosic progress
Stirring 2 minutes for the first time, obtain pre- mixture；0.4 part of water intaking is measured simultaneously, 0.012 part of water-reducing agent of thickening is stirred mixing 2
Minute, obtain mixture；It is added mixture into pre- mixture again and carries out second of stirring 3 minutes, obtain final mixture,
The slump of final mixture is 25mm, as required to 3D printing concrete material sample 1#.Wherein, cementitious material is
The mass ratio of the mixture of cement and flyash, cement and flyash is 1:1.Cement is selected from portland cement or common silicic acid
Any one in salt cement, the strength grade of cement are 42.5 grades.The classification grade of flyash is I grades of flyash.Natural fine
Aggregate is the continuous grading natural river sand of partial size 0.5-2mm.The particle size range of nano silica is 1-50nm.The high-elastic poly- second of mould
The elasticity modulus of alkene fiber is 100-120N/tex.The length range of high-elastic mode polyethylene fiber is 10-20mm.Redispersible cream
Rubber powder is the copolymerization rubber powder of vinyl acetate and ethylene.Water is tap water.Thickening water-reducing agent is polycarboxylic acids and water-soluble cellulose
Ether compound additive.
The concrete material sample 1# that will be prepared again, it is layer-by-layer according to the program specifically set using 3D printer
Printing, forms multiple Combined concrete material sample 1#.Wherein, first coagulation in adjacent concrete combined material sample
After local soil type's condensation material sample 3D printing, the 5s before second Combined concrete material sample 3D printing, in two Combined concretes
Adhesive solidification is carried out by mucilage materials on contact interface between material sample, is repeated the above steps, thus by multiple coagulations
Local soil type condensation material sample 1# is bonded together.Wherein, mucilage materials are hot melt epoxy resin viscose glue, and specially bisphenol-A shrinks
Glycerin ether.The bonding of mucilage materials is with a thickness of 1.0mm.Bonding mode is mechanically spraying mode.The construction temperature of mucilage materials bonding
Degree is not less than 20 DEG C, and relative humidity is not less than 60%.The initial setting time of bonding is 3min, and it is for 24 hours that the time, which is fully cured,.
Then by multiple Combined concrete material sample 1# after the bonding prepared, the sundries on outer surface is removed,
Outer surface is carried out to strike off processing, the male and fomale(M&F) of the outer surface of multiple Combined concrete material sample 1# after making bonding is smooth,
If there is obvious shortcoming that can carry out small-scale operation of manually filling a vacancy, multiple Combined concrete material sample 1# after such as filling up bonding
The defects of honeycomb and hole on outer surface.Pass through on the outer surface of multiple Combined concrete material sample 1# after bonding again
Filmogen carries out film forming solidification, especially on the outer surface of multiple Combined concrete material sample 1# after bonding honeycomb and
The defects of hole, is filled up, to form the final required concrete component sample 1# for 3D printing.Wherein, at membrane material
Material is isocyanates-amido film forming agent, specially polyureas.Tensile strength >=30MPa of filmogen.Filmogen at film thickness
Degree is 2.5mm.Filmogen thin film-forming method is mechanically spraying mode, uses secondary film-forming mode, laggard for 24 hours forming a film for the first time
Second of film forming of row.The construction temperature of filmogen film forming is not less than 20 DEG C, and relative humidity is not less than 60%.Concrete component sample
The curing temperature of product 1# is 20 ± 2 DEG C, and curing age is 28 days.The maintenance humidity (relative humidity) of concrete component sample 1# is
>=95%.
Embodiment 2
By the formula rate of concrete material, metering takes 1.0 parts of cementitious material, 1.5 parts of natural fine aggregate, nanometer titanium dioxide
0.015 part of silicon, 0.03 part of high-elastic mode polyethylene fiber, 0.008 part of redispersable latex powder, 0.0008 part of lignocellulosic progress
Stirring 3 minutes for the first time, obtain pre- mixture；0.5 part of water intaking is measured simultaneously, 0.009 part of water-reducing agent of thickening is stirred mixing 3
Minute, obtain mixture；It is added mixture into pre- mixture again and carries out second of stirring 2 minutes, obtain final mixture,
The slump of final mixture is 30mm, as required to 3D printing concrete material sample 2#.Wherein, cementitious material is
The mass ratio of the mixture of cement and flyash, cement and flyash is 1:1.2.Cement is selected from portland cement or ordinary silicon
Any one in acid salt cement, the strength grade of cement are 42.5 grades.The classification grade of flyash is I grades of flyash.Naturally
Fine aggregate is the continuous grading natural river sand of partial size 0.5-2mm.The particle size range of nano silica is 1-50nm.High-elastic mould is poly-
The elasticity modulus of vinyl fiber is 110-130N/tex.The length range of high-elastic mode polyethylene fiber is 10-20mm.It is redispersible
Latex powder is ethylene and vinyl chloride and vinyl laurate vinegar ternary polymerization powder.Water is tap water.Thicken water-reducing agent be polycarboxylic acids and
Water-soluble cellulose ether compound additive.
The concrete material sample 2# that will be prepared again, it is layer-by-layer according to the program specifically set using 3D printer
Printing, forms multiple Combined concrete material sample 2#.Wherein, first coagulation in adjacent concrete combined material sample
After local soil type's condensation material sample 3D printing, the 5s before second Combined concrete material sample 3D printing, in two Combined concretes
Adhesive solidification is carried out by mucilage materials on contact interface between material sample, is repeated the above steps, thus by multiple coagulations
Local soil type condensation material sample 2# is bonded together.Wherein, mucilage materials are hot melt epoxy resin viscose glue, specially bisphenol-A and ring
The polymer of oxygen chloropropane, phenol and formaldehyde.The bonding of mucilage materials is with a thickness of 1.5mm.Bonding mode is mechanically spraying mode.
The construction temperature of mucilage materials bonding is not less than 20 DEG C, and relative humidity is not less than 60%.The initial setting time of bonding is 5min,
It is for 24 hours that the time, which is fully cured,.
Then by multiple Combined concrete material sample 2# after the bonding prepared, the sundries on outer surface is removed,
Outer surface is carried out to strike off processing, the male and fomale(M&F) of the outer surface of multiple Combined concrete material sample 2# after making bonding is smooth,
If there is obvious shortcoming that can carry out small-scale operation of manually filling a vacancy, multiple Combined concrete material sample 2# after such as filling up bonding
The defects of honeycomb and hole on outer surface.Pass through on the outer surface of multiple Combined concrete material sample 2# after bonding again
Filmogen carries out film forming solidification, especially on the outer surface of multiple Combined concrete material sample 2# after bonding honeycomb and
The defects of hole, is filled up, to form the final required concrete component sample 2# for 3D printing.Wherein, at membrane material
Material is isocyanates-amido film forming agent, specially polyureas.Tensile strength >=30MPa of filmogen.The film forming of filmogen
With a thickness of 3.0mm.Filmogen thin film-forming method is mechanically spraying mode, secondary film-forming mode is used, after forming a film for 24 hours for the first time
Second is carried out to form a film.The construction temperature of filmogen film forming is not less than 20 DEG C, and relative humidity is not less than 60%.Concrete component
The curing temperature of sample 2# is 20 ± 2 DEG C, and curing age is 28 days.The maintenance humidity (relative humidity) of concrete component sample 2#
It is >=95%.
Embodiment 3
By the formula rate of concrete material, metering takes 1.0 parts of cementitious material, 2.5 parts of natural fine aggregate, nanometer titanium dioxide
0.01 part of silicon, 0.02 part of high-elastic mode polyethylene fiber, 0.012 part of redispersable latex powder, 0.001 part of lignocellulosic carry out
Stirring 1 minute for the first time, obtains pre- mixture；0.60 part of water intaking is measured simultaneously, 0.005 part of water-reducing agent of thickening is stirred mixing
1 minute, obtain mixture；It is added mixture into pre- mixture again and carries out second of stirring 3 minutes, obtain final mix
Object, the slump of final mixture are 20mm, as required to 3D printing concrete material sample 3#.Wherein, be gelled material
Material is the mixture of cement and flyash, and the mass ratio of cement and flyash is 1:0.8.Cement is selected from portland cement or general
Lead to any one in portland cement, the strength grade of cement is 42.5 grades.The classification grade of flyash is I grades of flyash.
The continuous grading natural river sand that natural fine aggregate is partial size 0.5-2mm.The particle size range of nano silica is 1-50nm.It is high-elastic
The elasticity modulus of mode polyethylene fiber is 120-140N/tex.The length range of high-elastic mode polyethylene fiber is 10-20mm.It can be again
Dispersed latex powder is vinyl acetate and ethylene and higher fatty acids ethylene rouge ternary polymerization powder.Water is tap water.Thicken diminishing
Agent is polycarboxylic acids and water-soluble cellulose ether compound additive.
The concrete material sample 3# that will be prepared again, it is layer-by-layer according to the program specifically set using 3D printer
Printing, forms multiple Combined concrete material sample 3#.Wherein, first coagulation in adjacent concrete combined material sample
After local soil type's condensation material sample 3D printing, the 4s before second Combined concrete material sample 3D printing, in two Combined concretes
Adhesive solidification is carried out by mucilage materials on contact interface between material sample, is repeated the above steps, thus by multiple coagulations
Local soil type condensation material sample 3# is bonded together.Wherein, mucilage materials are hot melt epoxy resin viscose glue, specially epoxychloropropane
With the polycondensation product of polyalcohol.The bonding of mucilage materials is with a thickness of 0.5mm.Bonding mode is mechanically spraying mode.Mucilage materials
The construction temperature of bonding is not less than 20 DEG C, and relative humidity is not less than 60%.The initial setting time of bonding is 4min, is fully cured
Time is for 24 hours.
Then by multiple Combined concrete material sample 3# after the bonding prepared, the sundries on outer surface is removed,
Outer surface is carried out to strike off processing, the male and fomale(M&F) of the outer surface of multiple Combined concrete material sample 3# after making bonding is smooth,
If there is obvious shortcoming that can carry out small-scale operation of manually filling a vacancy, multiple Combined concrete material sample 3# after such as filling up bonding
The defects of honeycomb and hole on outer surface.Pass through on the outer surface of multiple Combined concrete material sample 3# after bonding again
Filmogen carries out film forming solidification, especially on the outer surface of multiple Combined concrete material sample 3# after bonding honeycomb and
The defects of hole, is filled up, to form the final required concrete component sample 3# for 3D printing.Wherein, at membrane material
Material is isocyanates-amido film forming agent, specially polyureas.Tensile strength >=30MPa of filmogen.Filmogen at film thickness
Degree is 2.0mm.Filmogen thin film-forming method is mechanically spraying mode, uses secondary film-forming mode, laggard for 24 hours forming a film for the first time
Second of film forming of row.The construction temperature of filmogen film forming is not less than 20 DEG C, and relative humidity is not less than 60%.Concrete component sample
The curing temperature of product 3# is 20 ± 2 DEG C, and curing age is 28 days.The maintenance humidity (relative humidity) of concrete component sample 3# is
>=95%.
Reference examples 1
By the formula rate of concrete material in embodiment 1, metering take 1.0 parts of cementitious material, 2.0 parts of natural fine aggregate,
0.01 part of redispersable latex powder, 0.0005 part of lignocellulosic；0.4 part of water intaking, 0.012 part of water-reducing agent of thickening are measured simultaneously,
Concrete material control sample 1* is prepared according to the preparation method of concrete material in embodiment 1.Then, by concrete material
Expect that control sample 1* carries out 3D printing using 3D printer, obtains concrete component sample 1*.
Reference examples 2
By the formula rate of concrete material in embodiment 1, metering take 1.0 parts of cementitious material, 2.0 parts of natural fine aggregate,
0.012 part of nano silica, 0.01 part of redispersable latex powder, 0.0005 part of lignocellulosic；Water intaking 0.4 is measured simultaneously
Part, 0.012 part of water-reducing agent of thickening prepare concrete material control according to the preparation method of concrete material in embodiment 1
Sample 2*.Then, concrete material control sample 2* is subjected to 3D printing using 3D printer, obtains concrete component sample
2*。
Reference examples 3
By the formula rate of concrete material in embodiment 1, metering take 1.0 parts of cementitious material, 2.0 parts of natural fine aggregate,
0.012 part of nano silica, 0.025 part of high-elastic mode polyethylene fiber, 0.01 part of redispersable latex powder, lignocellulosic
0.0005 part；0.4 part of water intaking, 0.012 part of water-reducing agent of thickening are measured simultaneously, according to the preparation side of concrete material in embodiment 1
Method prepares concrete material control sample 3*.Then, concrete material control sample 3* is subjected to 3D using 3D printer
Printing obtains concrete component sample 3*.
Reference examples 4
By the formula rate of concrete material in embodiment 1, metering take 1.0 parts of cementitious material, 2.0 parts of natural fine aggregate,
0.012 part of nano silica, 0.025 part of high-elastic mode polyethylene fiber, 0.01 part of redispersable latex powder, lignocellulosic
0.0005 part；0.4 part of water intaking, 0.012 part of water-reducing agent of thickening are measured simultaneously, according to the preparation side of concrete material in embodiment 1
Method prepares concrete material control sample 4*.Then, by concrete material control sample 4*, according to coagulation in embodiment 1
The preparation method of local soil type's condensation material prepares coagulation local soil type condensation material control sample 4*, and by coagulation local soil type condensation material control sample
Product 4* is as concrete component sample 4*.
Compare and discuss:
The concrete component sample that will be obtained in embodiment 1, reference examples 1-4, carries out performance measurement respectively.Specifically,
The primary evaluation index of concrete component is mechanical property (compression strength, tensile strength and bending strength etc.), interface adhesion
Can, overall performance and appearance have been carried out and have been based under the identical ratio of mud, different 3D printing concrete component performance measurements,
It because the evaluation index that Different Water-Cement Ratio obtains is different, can not enumerate one by one, so the quantized data obtained by test is converted
For qualitative analysis index, concrete outcome is shown in Table 1.
As shown in Table 1, Nano-meter SiO_22The incorporation of material improves the mechanical property of cementitious material, predominantly compression strength,
10% or more cementitious material compression strength can be promoted.The incorporation of high-elastic mode polyethylene fiber, the stretch bending for improving cementitious material are strong
Degree, the cement-based gelling material limiting strain for mixing high-elastic mode polyethylene fiber through measuring and calculating can reach 8% or more.Epoxy resin is viscous
Glue is used for Interface enhancer, is remarkably improved the interface performance and overall performance of 3D printing concrete material and component.Isocyanic acid
Ester-amido film technique can promote the overall performance of 3D printing concrete component, and can achieve the effect of surface-beautifying,
Have both good functionality.
Quality overall merit of the table 1 based on concrete component samples different under 3D printing technique
Test result based on the above case study on implementation is it is found that proposed by the present invention based on the 3D printing coagulation promoted at many levels
Soil material, more traditional 3D printing concrete material have significantly in mechanical property, interface performance, overall performance and appearance
It improves.Application and popularization of the invention can promote 3D printing technique in China's building trade applying, and be its industrialization promotion
Establish application foundation.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of concrete material, in parts by weight, including following components:
Cementitious material: 1.0 parts；
Natural fine aggregate: 0.2-4.0 parts；
Nano silica: 0.001-0.03 parts；
High-elastic mode polyethylene fiber: 0.005-0.05 parts；
Redispersable latex powder: 0.001-0.05 parts；
Cellulose: 0.0001-0.002 parts；
Water: 0.2-0.6 parts；
Thickening water-reducing agent: 0.003-0.02 parts.
2. a kind of concrete material according to claim 1, which is characterized in that including any one of the following conditions or more
:
A1) cementitious material is the mixture of cement and flyash, and wherein the mass ratio of cement and flyash is 1:0.5-
1:2；
A2) the natural fine aggregate is the continuous grading natural river sand of partial size 0.15-5mm；
A3) particle size range of the nano silica is 1-100nm；
A4) elasticity modulus of the high-elastic mode polyethylene fiber is 91-140N/tex, the length range of high-elastic mode polyethylene fiber
For 1.5-50.0mm；
A5) cellulose is selected from one of hydroxypropyl methyl cellulose or lignocellulosic；
A6) the thickening water-reducing agent is polycarboxylic acids and water-soluble cellulose ether compound additive.
3. a kind of preparation method of concrete material, which is characterized in that concrete material according to claim 1 to 2
Formula rate, each component is carried out after metering stirring to obtain the final product.
4. a kind of preparation method of concrete material according to claim 3, which comprises the following steps:
A the formula rate of concrete material) is pressed, metering takes cementitious material, natural fine aggregate, nano silica, high-elastic mould poly-
Vinyl fiber, redispersable latex powder and cellulose carry out first time stirring, obtain pre- mixture；
B the formula rate of concrete material) is pressed, after metering water intaking is stirred and mixes with thickening water-reducing agent, acquisition mixture；
C) mixture in step 2) is added in the pre- mixture in step 1) again and carries out second of stirring, acquisition is finally mixed
Close object, as required to 3D printing concrete material.
5. purposes of the concrete material according to claim 1 to 2 in the concrete material as 3D printing.
6. a kind of coagulation local soil type condensation material, which is characterized in that concrete material metering according to claim 1 to 2 is mixed
3D printing is carried out after conjunction to be formed.
7. a kind of concrete component, which is characterized in that include mucilage materials, filmogen and multiple according to claim 6 institute
The coagulation local soil type condensation material stated passes through mucilage materials between at least part of the multiple coagulation local soil type condensation material and bonds, bonding
The outer surface of at least part of the multiple coagulation local soil type condensation material afterwards forms cured film by filmogen.
8. a kind of concrete component according to claim 7, which is characterized in that the mucilage materials are hot melt asphalt mixtures modified by epoxy resin
Rouge viscose glue；The bonding of the mucilage materials is with a thickness of 0.1-5.0mm.
9. a kind of concrete component according to claim 7, which is characterized in that the filmogen is isocyanates-amine
Base film forming agent；The film forming thickness of the filmogen is 0.1-10mm.
10. according to a kind of preparation method of any concrete component of claim 7-9, comprising the following steps:
1) coagulation local soil type condensation material is bonded by mucilage materials；
2) outer surface of the coagulation local soil type condensation material by filmogen after bonding carries out film forming solidification.
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| CN115057672A (en) * | 2022-04-15 | 2022-09-16 | 重庆大学溧阳智慧城市研究院 | 3D printing conductive concrete based on nano graphite-nano SiO 2-copper slag |
| CN115057672B (en) * | 2022-04-15 | 2023-08-15 | 重庆大学溧阳智慧城市研究院 | 3D printing conductive concrete based on nano graphite-nano SiO 2-copper slag |
| CN114890758A (en) * | 2022-05-13 | 2022-08-12 | 四川华能泸定水电有限公司 | Cement-based material for 3D printing |
| CN116161921A (en) * | 2022-12-07 | 2023-05-26 | 华润水泥技术研发有限公司 | High-elastic-modulus concrete material for 3D printing and preparation method thereof |
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