CN107825560A - The compound concrete track plates and its method for prefabricating of a kind of 3D printing - Google Patents
The compound concrete track plates and its method for prefabricating of a kind of 3D printing Download PDFInfo
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- CN107825560A CN107825560A CN201711234587.2A CN201711234587A CN107825560A CN 107825560 A CN107825560 A CN 107825560A CN 201711234587 A CN201711234587 A CN 201711234587A CN 107825560 A CN107825560 A CN 107825560A
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- 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
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- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
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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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00181—Mixtures specially adapted for three-dimensional printing (3DP), stereo-lithography or prototyping
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
The invention discloses the compound concrete track plates and its method for prefabricating of a kind of 3D printing, the track plates, including sandwich layer, enhancement layer and reinforcing frame, sandwich layer is formed by steel fiber reinforced concrete or plain concrete through 3D printing, and enhancement layer and reinforcing frame form by steel fiber reinforced concrete through 3D printing；The prefabricated track plates, comprise the following steps：The cleaning of track plates printing template and the installation of built-in fitting and sleeve pipe；The 3D printing of track plates bottom track and bottom enhancement layer；The 3D printing of reinforcing frame and sandwich layer；The 3D printing of crown-reinforcing；Maintenance and the demoulding.The track plates obtained using the method for prefabricating of the application, formed using steel fiber reinforced concrete, plain concrete as printed material using the printing of large-scale 3D printer hierarchical block, reinforcing bar or presstressed reinforcing steel need not be arranged, cracking resistance, shock resistance and the anti-fatigue performance of concrete railway board can be significantly improved, simplify the production technology of track plates, reduce the construction costs of track plates.
Description
Technical field
The present invention relates to building material field, and in particular to compound concrete track plates of a kind of 3D printing and its prefabricated
Method.
Background technology
High-speed railway by its speed is fast, carrying capacity is big, safe and reliable, energy-conserving and environment-protective, the traditional railway such as economical and practical without
The advantage of method analogy, shows booming vigorous pace in worldwide.By 2016 end of the years, China's high-speed iron
Road construction and operation mileage have reached 22,000km, occupy the 2/3 of whole world total amount.Compared with traditional Ballast track, no tiny fragments of stone, coal, etc. rail
Stage property has outstanding advantages of track stability, rigidity uniformity and good endurance, ride comfort is high, maintenance load is small, at a high speed
It is widely applied in railway.Wherein, platy ballastless track structure has good intensity height, elasticity, easy construction, disease occurs
When it is easy to maintenance the advantages that, in countries in the world, application is relatively early also more.It is that rail is supported on into tool by multipair fastener system
Have the armored concrete or prestressed concrete plate i.e. on track plates of one fixed width and length, track plates be placed on infrastructure it
On.Track plates are structural elements crucial in slab track structure, and it directly bears train load and environmental activity.Track plates
Cracking and the damaged operation security for directly affecting bullet train.
At present, most of domestic and international fragment-free track slab uses armored concrete or prestressed concrete railway board, such as
GermanyThe track plates such as the types of CRTS I in plate, Japanese cell board and China, II type, III template.In concrete track
Arrangement reinforcing bar or tensioned prestressing bar, can play the characteristic that steel examining tensile behavior is good and concrete compression performance is good, energy in plate
Enough meet train load and environmental activity effect lower rail guidance tape load-carrying properties and deformation requirements, control track plates do not ftracture or
Fracture width meets design requirement.However, due to the repeated action of the early-age shrinkage of concrete, environmental activity and train load,
The measure such as configuration reinforcement and tensioned prestressing bar can not effectively block the appearance and development of concrete microcrack in track plates, right
The durability and train traffic safety of track structure have buried potential safety hazard.In addition, traditional concrete railway board steel bar meter,
The workload of colligation and prestressed stretch-draw is larger, and complex manufacturing, production efficiency is not high, and track plate factory has floor space
Greatly, the problems such as construction cost is high, and track plates comprehensive cost is high.
Steel fiber reinforced concrete be in normal concrete mix random distribution short steel fibre formed it is a kind of new
Heterogeneous composite material.The steel fibre of these random distributions can effectively hinder to shrink and plastic deformation causes inside concrete micro-
The extension in crack and the formation of macrocrack, tension, bending resistance, shock resistance and the anti-fatigue performance of concrete are significantly improved,
With preferable ductility, toughness and durability.Steel fiber reinforced concrete as a kind of important modified concrete, architectural engineering,
Road is widely used with industries such as science of bridge building, hydraulic engineering, port engineering and railway constructions.Substantial amounts of experiment is ground
Study carefully proof, the mixing of steel fiber in concrete sleeper, the cracking resistance of sleeper, shock resistance and antifatigue can be significantly improved
Performance.
3D printing (3DP) is a kind of based on mathematical model file, and material can be bonded with powdery metal, plastics etc.
Material, using digital technology file printing machine by by the way of successively printing come the new technology of constructed object rapid shaping.The technology
Not increasing cost, product diversification with manufacture complex article does not increase cost, without assembling, zero-time delivery, design space
Infinitely, zero technical ability manufacture, do not take up space, it is portable manufacture, reduce waste by-product, material endless combinations, accurate physical replication
Etc. advantage.At present, 3D printing technique is widely used in machinery and automobile making, industrial design, Aero-Space, dentistry and medical treatment
The fields such as industry, civil engineering.3D printing is just helping from industry-by-industry, there is the people of different background and level professional technology to use
Similar mode reduces all trades and professions major product cost, time and complicated sexual dysfunction.
In order to improve the cracking resistance of concrete railway board, shock resistance and the comprehensive mechanical property such as antifatigue, simplify track plates
Production technology, production efficiency is improved, the cost of manufacture of track plates is reduced, researches and develops the fiber concrete track based on 3D printing technique
Plate manufacturing process, manpower and materials can be effectively saved, reduce engineering comprehensive cost, there are boundless market prospects.
The content of the invention
The technical problems to be solved by the invention are：For existing concrete track harden structure cracking resistance, shock resistance and resist
A kind of high deficiency of the deficiency of fatigue behaviour, complex manufacturing, comprehensive cost, there is provided the compound concrete track of 3D printing
Plate and its method for prefabricating, printed using steel fiber reinforced concrete, plain concrete as printed material using large-scale 3D printer hierarchical block
Form, without arranging reinforcing bar or presstressed reinforcing steel, cracking resistance, shock resistance and the fatigue resistance of concrete railway board can be significantly improved
Energy, simplify the production technology of track plates, reduce the construction costs of track plates.
The present invention is solved the above problems by following technological means：
A kind of compound concrete track plates of 3D printing, including sandwich layer, it is provided with the top and bottom of the sandwich layer
Enhancement layer, is distributed with multiple reinforcing frames between two enhancement layers, sandwich layer by steel fiber reinforced concrete or plain concrete through 3D printing and
Into enhancement layer and reinforcing frame are formed by steel fiber reinforced concrete through 3D printing, and the steel fibre volume in enhancement layer and reinforcing frame is mixed
Amount is all higher than the steel fibre volume volume in sandwich layer.
Further, the gross thickness of the track plates is 150-300mm, and the thickness of enhancement layer is the 1/5- of track plates gross thickness
1/3, the thickness of sandwich layer is the 1/3-3/5 of track plates gross thickness.
Further, the overall width of the track plates is 2200-2800mm, and the width of reinforcing frame is 100-200mm.
Further, for being molded the steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including following component：
52.5 grades of Portland cement 350-500 parts, flyash 50-70 parts, active mineral admixture 30-40 parts, 5-10mm rubbles
900-1100 parts, middle sand 600-750 parts, water-reducing rate are more than 30% polycarboxylic acid series high efficiency water reducing agent 5-7 parts, accelerator 7-12
Part, steel fibre 120-280 parts.
Further, the steel fibre tensile strength used in described enhancement layer and reinforcing frame is not less than 2000MPa, a diameter of
Ratio between 0.15-0.32mm, length and diameter is 50-70, and the volume volume of steel fibre is in enhancement layer and reinforcing frame
2%-3.5%, the volume volume of steel fibre is 1.5%-2% in sandwich layer.
Prefabricated above-mentioned track plates, comprise the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and sleeve pipe；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；
S304：The piecemeal synchronization 3D printing of track plates reinforcing frame and sandwich layer；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and the demoulding of track plates.
Beneficial effects of the present invention：
1st, track plates of the invention make use of enhancing and toughening effect of the steel fibre to concrete, can effectively control coagulation
Native plastic shrinkage and infant cracking, tension, bending resistance, shock resistance and the anti-fatigue performance of track plates are significantly improved, had preferable
Ductility, toughness and durability.
2nd, steel fibre is mainly arranged in the inferior stress of top, bottom, surrounding and rail of track plates in track plates of the invention
Unfavorable position, the dosage of steel fibre on the premise of the comprehensive mechanical property for ensureing track plates meets to require, can be saved,
Reduce the cost of track plates.
3rd, track plates of the invention are using steel fiber reinforced concrete, plain concrete as printed material, using advanced 3D printing skill
The printing of art hierarchical block forms, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduces
The construction cost of track plate factory and the construction costs of track plates.
4th, the steel fibre of track plates bottom surface of the invention protrusion adds the roughness at plate bottom, can improve track plates with
Portion fills the adhesive property of bed boundary.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is cross-sectional view in the plate of the compound concrete track plates in embodiment.
Fig. 2 is the plate central fore-and-aft vertical plane figure of the compound concrete track plates in embodiment.
Fig. 3 is the 3D printing prefabricated construction flow chart of the compound concrete track plates in embodiment.
Label in figure：1- enhancement layers, 2- reinforcing frames, 3- sandwich layers.
Embodiment
For the ease of understanding the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face, meticulously describe, but protection scope of the present invention is not limited to embodiment in detail below.
Embodiment 1
Such as Fig. 1-2, it is illustrated that described compound concrete track plates, be made up of, strengthen enhancement layer, sandwich layer and reinforcing frame
Layer is arranged on the top and bottom of sandwich layer, and enhancement layer is formed by the steel fiber reinforced concrete of high additive through 3D printing, and sandwich layer is by low-mix
The steel fiber reinforced concrete or plain concrete of amount form through 3D printing, and reinforcing frame is between two enhancement layers are arranged on, specific point
Cloth is also formed in the lower section of surrounding and track laying position, reinforcing frame by steel fiber reinforced concrete through 3D printing, by strengthening
Steel fibre is set in layer and reinforcing frame, enhancing and toughening effect of the steel fibre to concrete is make use of, can effectively control mixed
Native plastic shrinkage and infant cracking are coagulated, significantly improves tension, bending resistance, shock resistance and the anti-fatigue performance of track plates, is had preferable
Ductility, toughness and durability, meanwhile, steel fibre is mainly arranged in the inferior stress of top, bottom, surrounding and rail of track plates not
The position of profit, the dosage of steel fibre, drop on the premise of the comprehensive mechanical property for ensureing track plates meets to require, can be saved
The low cost of track plates；For being molded the high additive steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including
Following component：52.5 grades of 350 parts of Portland cements, 50 parts of flyash, 30 parts of active mineral admixture, 5mm rubbles 900
Part, middle 600 parts of sand, water-reducing rate is more than 30% 5 parts of polycarboxylic acid series high efficiency water reducing agent, 7 parts of accelerator, 120 parts of steel fibre；Strengthen
Steel fibre tensile strength used in layer and reinforcing frame is not less than ratio between 2000MPa, a diameter of 0.15mm, length and diameter
50, the volume volume of steel fibre is 2.5% in enhancement layer and reinforcing frame, and the volume volume of steel fibre is 1.5% in sandwich layer, is added
Steel fibre volume volume in strong layer and reinforcing frame is all higher than the steel fibre volume volume in sandwich layer.
Prefabricated above-mentioned track plates, as shown in figure 3, comprising the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and sleeve pipe；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；The steel fibre protrusion track of bottom enhancement layer
Plate bottom surface, the steel fibre of protrusion add the roughness at plate bottom, can improve track plates and the caking property of bottom filling bed boundary
Energy；
S304：The piecemeal synchronization 3D printing of track plates reinforcing frame and sandwich layer；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and the demoulding of track plates.
In the present embodiment, prefabricated obtained track plates, gross thickness 150mm, the thickness of enhancement layer is track plates gross thickness
1/5, the thickness of sandwich layer is the 3/5 of track plates gross thickness；The overall width of track plates is 2200mm, and reinforcing frame is cuboid shape,
The width of reinforcing frame is 100mm.
Using above-mentioned method for prefabricating, enhancement layer, sandwich layer and reinforcing frame are using the layering point of advanced 3D printing technique
Block printing forms, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduce track plates
The construction cost of plate factory and the construction costs of track plates.
Embodiment 2
Such as Fig. 1-2, it is illustrated that described compound concrete track plates, be made up of, strengthen enhancement layer, sandwich layer and reinforcing frame
Layer is arranged on the top and bottom of sandwich layer, and enhancement layer is formed by the steel fiber reinforced concrete of high additive through 3D printing, and sandwich layer is by low-mix
The steel fiber reinforced concrete or plain concrete of amount form through 3D printing, and reinforcing frame is between two enhancement layers are arranged on, specific point
Cloth is also formed in the lower section of surrounding and track laying position, reinforcing frame by steel fiber reinforced concrete through 3D printing, by strengthening
Steel fibre is set in layer and reinforcing frame, enhancing and toughening effect of the steel fibre to concrete is make use of, can effectively control mixed
Native plastic shrinkage and infant cracking are coagulated, significantly improves tension, bending resistance, shock resistance and the anti-fatigue performance of track plates, is had preferable
Ductility, toughness and durability, meanwhile, steel fibre is mainly arranged in the inferior stress of top, bottom, surrounding and rail of track plates not
The position of profit, the dosage of steel fibre, drop on the premise of the comprehensive mechanical property for ensureing track plates meets to require, can be saved
The low cost of track plates；For being molded the steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including such as the following group
Point：52.5 grades of 400 parts of Portland cements, 60 parts of flyash, 35 parts of active mineral admixture, 1000 parts of 8mm rubbles, middle sand
700 parts, water-reducing rate is more than 30% 6 parts of polycarboxylic acid series high efficiency water reducing agent, 10 parts of accelerator, 200 parts of steel fibre；Enhancement layer and plus
The ratio that steel fibre tensile strength used in strong frame is not less than between 2000MPa, a diameter of 0.20mm, length and diameter is 60, is added
The volume volume of steel fibre is 2% in strong layer and reinforcing frame, and the volume volume of steel fibre is 1.8% in sandwich layer, enhancement layer and
Steel fibre volume volume in reinforcing frame is all higher than the steel fibre volume volume in sandwich layer.
Prefabricated above-mentioned track plates, as shown in figure 3, comprising the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and sleeve pipe；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；
S304：The piecemeal synchronization 3D printing of track plates reinforcing frame and sandwich layer；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and the demoulding of track plates.
In the present embodiment, prefabricated obtained track plates, gross thickness 200mm, the thickness of enhancement layer is track plates gross thickness
1/5, the thickness of sandwich layer is the 3/5 of track plates gross thickness；The overall width of track plates is 2500mm, and reinforcing frame is cuboid shape,
The width of reinforcing frame is 150mm.
Using above-mentioned method for prefabricating, enhancement layer, sandwich layer and reinforcing frame are using the layering point of advanced 3D printing technique
Block printing forms, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduce track plates
The construction cost of plate factory and the construction costs of track plates.
Embodiment 3
Such as Fig. 1-2, it is illustrated that described compound concrete track plates, be made up of, strengthen enhancement layer, sandwich layer and reinforcing frame
Layer is arranged on the top and bottom of sandwich layer, and enhancement layer is formed by steel fiber reinforced concrete through 3D printing, and sandwich layer is by steel fiber reinforced concrete
Or plain concrete forms through 3D printing, reinforcing frame is specifically distributed in surrounding and track between two enhancement layers are arranged on
The lower section of paving location, reinforcing frame are also formed by steel fiber reinforced concrete through 3D printing, by being set in enhancement layer and reinforcing frame
Steel fibre is put, enhancing and toughening effect of the steel fibre to concrete is make use of, can effectively control Plastic Shrinkage of Concrete early
Phase crackle, tension, bending resistance, shock resistance and the anti-fatigue performance of track plates are significantly improved, there is preferable ductility, toughness and durable
Property, meanwhile, steel fibre is mainly arranged in the unfavorable position of the inferior stress of top, bottom, surrounding and rail of track plates, can protect
The comprehensive mechanical property for demonstrate,proving track plates meets on the premise of requiring, saves the dosage of steel fibre, reduces the cost of track plates；
For being molded the steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including following component：52.5 grades of common silicic acid
500 parts of salt cement, 70 parts of flyash, 40 parts of active mineral admixture, 1100 parts of 10mm rubbles, middle 750 parts of sand, water-reducing rate is more than
7 parts of 30% polycarboxylic acid series high efficiency water reducing agent, 12 parts of accelerator, 280 parts of steel fibre；Steel fibre used in enhancement layer and reinforcing frame
Tensile strength is 70 not less than the ratio between 2000MPa, a diameter of 0.32mm, length and diameter, in enhancement layer and reinforcing frame
The volume volume of steel fibre is 3.5%, and the volume volume of steel fibre is 2% in sandwich layer, the steel fibre in enhancement layer and reinforcing frame
Volume volume is all higher than the steel fibre volume volume in sandwich layer.
Prefabricated above-mentioned track plates, as shown in figure 3, comprising the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and sleeve pipe；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；The steel fibre protrusion track of bottom enhancement layer
Plate bottom surface, the steel fibre of protrusion add the roughness at plate bottom, can improve track plates and the caking property of bottom filling bed boundary
Energy；
S304：The piecemeal synchronization 3D printing of track plates reinforcing frame and sandwich layer；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and the demoulding of track plates.
In the present embodiment, prefabricated obtained track plates, gross thickness 300mm, the thickness of enhancement layer is track plates gross thickness
1/3, the thickness of sandwich layer is the 1/3 of track plates gross thickness；The overall width of track plates is 2800mm, and reinforcing frame is cuboid shape,
The width of reinforcing frame is 200mm.
Using above-mentioned method for prefabricating, enhancement layer, sandwich layer and reinforcing frame are using the layering point of advanced 3D printing technique
Block printing forms, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduce track plates
The construction cost of plate factory and the construction costs of track plates.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (6)
- A kind of 1. compound concrete track plates of 3D printing, it is characterised in that：Including sandwich layer, the top and bottom of the sandwich layer Enhancement layer is provided with, multiple reinforcing frames are distributed between two enhancement layers, sandwich layer is passed through by steel fiber reinforced concrete or plain concrete 3D printing forms, and enhancement layer and reinforcing frame form by steel fiber reinforced concrete through 3D printing, and the steel in enhancement layer and reinforcing frame is fine Dimension volume volume is all higher than the steel fibre volume volume in sandwich layer.
- 2. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：The track plates it is total Thickness is 150-300mm, and the thickness of enhancement layer is the 1/5-1/3 of track plates gross thickness, and the thickness of sandwich layer is track plates gross thickness 1/3-3/5.
- 3. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：The track plates it is total Width is 2200-2800mm, and the width of reinforcing frame is 100-200mm.
- 4. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：For being molded enhancement layer And the steel fiber reinforced concrete of reinforcing frame is by weight, including following component：52.5 grades of Portland cement 350-500 Part, flyash 50-70 parts, active mineral admixture 30-40 parts, 5-10mm rubble 900-1100 parts, middle sand 600-750 parts, subtract Water rate is more than 30% polycarboxylic acid series high efficiency water reducing agent 5-7 parts, accelerator 7-12 parts, steel fibre 120-280 parts.
- 5. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：Described enhancement layer and Steel fibre tensile strength used in reinforcing frame is not less than the ratio between 2000MPa, a diameter of 0.15-0.32mm, length and diameter For 50-70, the volume volume of steel fibre is 2%-3.5% in enhancement layer and reinforcing frame, the volume volume of steel fibre in sandwich layer For 1.5%-2%.
- A kind of 6. method for prefabricating of compound concrete track plates as described in claim 1-5 any one, it is characterised in that Comprise the following steps：S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；S302：The cleaning of track plates printing template and the installation of built-in fitting and sleeve pipe；S303：The 3D printing of track plates bottom track and bottom enhancement layer；S304：The piecemeal synchronization 3D printing of track plates reinforcing frame and sandwich layer；S305：The 3D printing of track plates crown-reinforcing；S306：The maintenance and the demoulding of track plates.
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| CN201711234587.2A CN107825560B (en) | 2017-11-30 | 2017-11-30 | 3D printed composite concrete track plate and prefabricating method thereof |
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| CN107825560A true CN107825560A (en) | 2018-03-23 |
| CN107825560B CN107825560B (en) | 2023-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112549247A (en) * | 2020-12-01 | 2021-03-26 | 河北建工建筑装配股份有限公司 | Production method of 3D printing exterior wall cladding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2866579Y (en) * | 2006-01-23 | 2007-02-07 | 中铁八局集团有限公司 | Insulating prestressing frame railway plate |
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| CN2866579Y (en) * | 2006-01-23 | 2007-02-07 | 中铁八局集团有限公司 | Insulating prestressing frame railway plate |
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| CN104961411A (en) * | 2015-07-01 | 2015-10-07 | 黄贺明 | High-performance powder concrete for 3D (three-dimensional) printing |
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| CN107825560B (en) | 2023-06-09 |
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