CN207362695U - A kind of ultra-high performance concrete floorings - Google Patents

A kind of ultra-high performance concrete floorings Download PDF

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Publication number
CN207362695U
CN207362695U CN201721211268.5U CN201721211268U CN207362695U CN 207362695 U CN207362695 U CN 207362695U CN 201721211268 U CN201721211268 U CN 201721211268U CN 207362695 U CN207362695 U CN 207362695U
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China
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ultra
performance concrete
performance
floorings
concrete plate
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CN201721211268.5U
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Inventor
梁立农
王诚
郭文华
黄湛军
李旭华
刘安兴
黎敏
王强
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Guangdong Province Communications Planning & Design Institute Co Ltd
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Guangdong Province Communications Planning & Design Institute Co Ltd
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Abstract

The utility model discloses a kind of ultra-high performance concrete floorings, it is connected as one and is formed by the ultra-high performance concrete plate being arranged in array, ultra-high performance concrete plate bottom surface is groove-like, the groove is in the flat truncated rectangular pyramids shape gradually included from top to bottom, it is equipped with ultra-high performance concrete plate by the integral bar-mat reinforcement of the bar connecting set along two stress principal directions, linkage section between adjacent two ultra-high performance concretes plate is ultra-high performance concrete plate linkage section, all or part of ultra-high performance concrete plate linkage section is connected with the internals of the girder below floorings.The utility model improves floorings local stiffness, solves using fatigue cracking disease caused by Orthotropic Steel Bridge Deck;The adhesive property and mutually coordinated deformation performance of UHPC and bituminous concrete are preferable, avoid Orthotropic Steel Bridge Deck and the bonding risk that easily failure and asphalt mixture surfacing are easily damaged of asphalt wearing layer, and deck paving can use conventional pitch concrete.

Description

A kind of ultra-high performance concrete floorings
Technical field
It the utility model is related to a kind of ultra-high performance concrete (UHPC) floorings.
Background technology
Orthotropic Steel Bridge Deck is formed by steel top plate, longitudinal stiffener and diaphragm plate by solder design, it with From series of advantages such as heavy and light, the big, short construction periods of ultimate bearing capacity, and it is widely used in Longspan Bridge, but due to The factors such as steel bridge deck rigidity is smaller and the adhesive property of bituminous concrete and mutually coordinated deformation performance are poor, make many There are a large amount of diseases such as fatigue cracking, pave-load layer damage (track, pit slot) in in-service Orthotropic Steel Bridge Deck;And use compared with The normal concrete floorings of weight replace the Orthotropic Steel Bridge Deck on girder steel, although it is tired to solve Orthotropic Steel Bridge Deck Labor disease, but since its own tensile strength is relatively low, not only plate is thicker, dead weight is larger, economy is poor, and wet seam, Nearby nearby floorings are also easy to produce crack for floorings and prestressed anchorage zone for staying cable anchorage zone, and ultra-high performance concrete (UHPC) it can effectively solve the problems, such as that normal concrete tensile strength is relatively low, it has the advantages that following prominent:
(1), since UHPC tensions, compression strength are high, UHPC combined bridge decks only need normal concrete floorings half or so Thickness, dead load is light, effectively reduces substructure and foundation engineering scale, good economy performance.
(2) UHPC combined bridge decks replace Orthotropic Steel Bridge Deck, can avoid the occurrence of cross bridge floor board completely Fatigue cracking problem, improves the durability of structure.
(3) the concrete knot that UHPC combined bridge decks are made of inorganic material such as cement, silicon ash, quartz sand, steel fibres Structure, it is preferable with the adhesive property of asphalt concrete pavement and mutually coordinated deformation performance, solve Orthotropic Steel Bridge Deck with The problem of bonding of asphalt wearing layer easily fails and asphalt mixture surfacing is easily damaged, and deck paving can use conventional pitch Concrete, good economy performance.
(4) the high-tensile of UHPC solves normal concrete floorings and easily produces floorings because tensile strength is low The problem of crack, and due to its chloride diffusion coefficient be only common coagulation 1/100 or so, water imbibition be only common coagulation 1/14 or so, it is steam-cured after the substantially zeroed, Creep Coefficient of contraction be only 15% of normal concrete or so, therefore, UHPC groups Floorings durability height, service life length are closed, later maintenance expense is low.
Utility model content
The purpose of this utility model is to provide a kind of tension and compression strength are high, connection is reliable, durability is good, cost compared with Low ultra-high performance concrete (UHPC) floorings, can effectively solve existing using fatigue caused by Orthotropic Steel Bridge Deck The problem for the long-standing problem engineering circles such as cracking, deck paving are damaged and normal concrete floorings easily crack, suitable for remaining silent Composite beam of steel box, I steel composite beam and steel truss combination beam etc..
The purpose of this utility model is realized by following technical measures:A kind of ultra-high performance concrete floorings, its It is characterized in that:It is to be connected as one to form by the ultra-high performance concrete plate being arranged in array, the ultra-high performance concrete The bottom surface of plate is groove-like, which is in the flat truncated rectangular pyramids shape gradually included from top to bottom, in ultra-high performance concrete plate The bar-mat reinforcement to be linked into an integrated entity equipped with the reinforcing bar by being set along two stress principal directions, between adjacent two ultra-high performance concretes plate Linkage section be ultra-high performance concrete plate linkage section, all or part of ultra-high performance concrete plate linkage section and be located at bridge floor The internals of girder below plate is connected.
The utility model significantly improves floorings local stiffness, solves using long caused by Orthotropic Steel Bridge Deck Phase perplexs the problem of fatigue cracking disease of engineering circles;Moreover, the adhesive property and mutually coordinated change of UHPC and bituminous concrete Shape better performances, the easy failure of bonding and the asphalt mixture surfacing for avoiding Orthotropic Steel Bridge Deck and asphalt wearing layer are easy The risk of damage, deck paving can use conventional pitch concrete.In addition, the utility model is using high tensile, compression strength Ultra-high performance concrete UHPC floorings, bridge floor plate thickness are only half of normal concrete floorings or so, from heavy and light, So that the substructure of bridge and basic small scale;Meanwhile the high-tensile of the utility model UHPC solves common coagulation Native floorings because tensile strength is low be also easy to produce bridge floor plank split the problem of, and its chloride diffusion coefficient is low, water imbibition is low, After steam-cured be punctured into zero and creep small, durability is high, service life length, later maintenance expense is low, good economy performance.
As a kind of embodiment of the utility model, the internals of the girder is crossbeam and longeron, the crossbeam With the crisscross formation network of longeron, every block of ultra-high performance concrete plate is located on a grid and ultra-high performance concrete Plate linkage section is connected with the top flange of crossbeam and longeron, and WELDING STUDS is equipped with the top flange of crossbeam and longeron.
One kind as the utility model is improved, the top flange of longitudinal and cross beam and adjacent two blocks of ultra-high performance concrete plates Between form haunch area, closed stirrups are equipped with the haunch area, and transverse bar or vertical muscle are had additional in haunch area, it is described to close Stirrup cuff is closed on the transverse steel or longitudinal reinforcement through haunch area.
The utility model can also do following improvement, and the floorings are mainly made of prefabricated section and Cast-in-Situ Segment, and adjacent two Prefabricated section is connected by Cast-in-Situ Segment, in the encryption reinforcing bar of prefabricated section of construction joint side arrangement reinforcement, pours into a mould ultra-high performance concrete After form prefabricated section;Mixed between adjacent two prefabricated sections along bridge to Cast-in-Situ Segment, the Cast-in-Situ Segment is reserved with cast very-high performance It is wet seam before solidifying soil.
As a kind of embodiment of the utility model, the wet seam is located at the top flange position of crossbeam and longeron, often Save prefabricated section to be formed by connecting by the complete ultra-high performance concrete plate of several piece, the Cast-in-Situ Segment is the very-high performance being connected with girder Concrete slab linkage section.
As the another embodiment of the utility model, the wet seam is located at span centre position, often saves prefabricated section by counting A part for the complete ultra-high performance concrete plate that block is connected and the ultra-high performance concrete plate positioned at its avris is formed by connecting, A part for adjacent two prefabricated sections of ultra-high performance concrete plate is connected to form complete ultra-high performance concrete by Cast-in-Situ Segment Plate, the Cast-in-Situ Segment are formed by ultra-high performance concrete cast.
As the another embodiment of the utility model, the wet seam is located at span centre position, often saves prefabricated section by counting A part for the complete ultra-high performance concrete plate that block is connected and the ultra-high performance concrete plate positioned at its avris is formed by connecting, A part for adjacent two prefabricated sections of ultra-high performance concrete plate is connected to form complete ultra-high performance concrete by Cast-in-Situ Segment Plate, the Cast-in-Situ Segment are to use the steel plate with WELDING STUDS to be formed after pouring into a mould ultra-high performance concrete again as the template of wet seam Local UHPC combined bridge decks.
Wet seam described in the utility model is located at span centre position, often saves prefabricated section by the complete ultra-high performance concrete of several piece Plate is formed by connecting, the Cast-in-Situ Segment be thicken ultra-high performance concrete seam construction, i.e., described Cast-in-Situ Segment be not with girder Connected ultra-high performance concrete plate linkage section.
The utility model anchors in ultra-high performance concrete plate linkage section prestressed strand, and the prestressed strand The prestress pipe laid through in ultra-high performance concrete plate linkage section, is additionally provided with ultra-high performance concrete plate linkage section Closed stirrups.
Girder described in the utility model is remain silent composite beam of steel box, I steel composite beam or steel truss combination beam.
Compared with prior art, the utility model has following significant effect:
(1) the utility model significantly improves floorings local stiffness, solves using caused by Orthotropic Steel Bridge Deck The problem of fatigue cracking disease, moreover, the adhesive property and mutually coordinated deformation performance of UHPC and bituminous concrete are preferable, avoid Orthotropic Steel Bridge Deck and the bonding of the asphalt wearing layer risk that easily failure and asphalt mixture surfacing are easily damaged, bridge floor Conventional pitch concrete can be used by mating formation.
(2) the utility model is using high tensile, the ultra-high performance concrete UHPC floorings of compression strength, bridge floor plate thickness Only half of normal concrete floorings or so, from heavy and light, can make the substructure of bridge and basic small scale.
(3) the high-tensile of the utility model UHPC solves normal concrete floorings and is easily produced because tensile strength is low The problem of raw bridge floor plank split, and its chloride diffusion coefficient is low, water imbibition is low, it is steam-cured after be punctured into zero and creep it is small, Durability is high, service life length, and later maintenance expense is low, good economy performance.
(4) the girder of the utility model can be remain silent composite beam of steel box, I steel composite beam and steel truss combination beam Deng, therefore girder used is in extensive range.
Brief description of the drawings
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the elevation of the utility model embodiment 1;
Fig. 2 is the Cast-in-Situ Segment schematic diagram of the utility model embodiment 1;
Fig. 3 is the bottom view of the utility model ultra-high performance concrete plate;
Fig. 4 is the side view of the utility model ultra-high performance concrete plate;
Fig. 5 is the prestressed strand optimal crosssection overall schematic of the utility model;
Fig. 6 is the utility model prestressed strand arrangement enlarged diagram;
Fig. 7 is the utility model arrangement of reinforcement schematic diagram;
Fig. 8 is the elevation of the utility model embodiment 2;
Fig. 9 is the Cast-in-Situ Segment schematic diagram of the utility model embodiment 2;
Figure 10 is the elevation of the utility model embodiment 3;
Figure 11 is the Cast-in-Situ Segment schematic diagram of the utility model embodiment 3;
Figure 12 is the Cast-in-Situ Segment schematic diagram of the utility model embodiment 4.
Embodiment
Embodiment 1
It is a kind of ultra-high performance concrete floorings 2 of the utility model, it is by being arranged in array as shown in Fig. 1~7 Ultra-high performance concrete plate 11 is connected as one composition, and the bottom surface of ultra-high performance concrete plate 11 is groove-like, which is In the flat truncated rectangular pyramids shape gradually included from top to bottom, referring to Fig. 7, it is equipped with ultra-high performance concrete plate 11 by along two stress The bar-mat reinforcement that the reinforcing bar that principal direction is set is linked into an integrated entity, in the present embodiment, is set altogether according to positive and negative Bending moment distribution situation Upper and lower two layers of bar-mat reinforcement, main reinforcement use C16~C25 reinforcing bars 7, and other direction distributing reinforcement uses C12~C20 reinforcing bars 71, and adjacent two Linkage section between ultra-high performance concrete plate 11 is ultra-high performance concrete plate linkage section, and all or part of very-high performance mixes Concrete board linkage section is connected with the internals of the girder 1 positioned at the lower section of floorings 2.Girder can be remain silent composite beam of steel box, I steel composite beam or steel truss combination beam etc..
The internals of girder is crossbeam 31 and longeron 3, crossbeam 31 and the crisscross formation network of longeron 3, every piece Ultra-high performance concrete plate 11 is located on a grid and ultra-high performance concrete plate linkage section and the top flange 4 of crossbeam and longeron Connection, is equipped with WELDING STUDS 5 on the top flange 4 of crossbeam and longeron.The top flange 4 of longitudinal and cross beam and adjacent two pieces of very-high performances Haunch area 13 is formed between concrete slab 11, the closed stirrups 6 of C12~C16 are equipped with haunch area 13, and in haunch area 13 In have additional transverse bar or vertical muscle 14,6 cuff of closed stirrups is on the transverse steel or longitudinal reinforcement through haunch area 13.
Floorings 2 are mainly made of prefabricated section 15 and Cast-in-Situ Segment 16, and adjacent two prefabricated sections 15 are connected by Cast-in-Situ Segment 16, root Need arranging the encryption reinforcing bar of reinforcement prefabricated section 15 of construction joint side according to stress, formed in advance after pouring into a mould ultra-high performance concrete Section 15 processed;Between adjacent two prefabricated sections 15 along bridge to being reserved with 300 millimeters~500 millimeters long Cast-in-Situ Segments 16, Cast-in-Situ Segment 16 It is wet seam before ultra-high performance concrete is poured into a mould.In the present embodiment, wet seam is located at span centre position, often saves prefabricated section 15 It is formed by connecting by a part for the complete ultra-high performance concrete plate 11 of several piece and the ultra-high performance concrete plate positioned at its avris, A part for adjacent two prefabricated sections 15 of ultra-high performance concrete plate is connected to form complete very-high performance by Cast-in-Situ Segment 16 and mixes Concrete board 11, Cast-in-Situ Segment 16 are formed by ultra-high performance concrete cast.Girder shell is welded and fused by splicing seams 17.
Anchoring has prestressed strand 8 in ultra-high performance concrete plate linkage section, and prestressed strand 8 passes through very-high performance The prestress pipe laid in concrete slab linkage section, is additionally provided with C12~C16's in ultra-high performance concrete plate linkage section Closed stirrups.
UHPC floorings span centre is 150 millimeters~200 millimeters thick, in crossbeam, 4 fulcrum of longeron top flange and arrangement prestress steel 250 millimeters~350 millimeters of UHPC bridge floors thickness of slab at the position of beam 8,2500~5000 millimeters of crossbeam spacing, bridge floor plate thickness according to Longitudinal and cross beam spacing and 8 deployment scenarios of prestressed strand and difference.
The work progress of the utility model is:
(1) prismatic table shape UHPC floorings set two layers of bar-mat reinforcement up and down altogether according to positive and negative Bending moment distribution situation, and main reinforcement uses C16~C25 reinforcing bars, other direction distributing reinforcement use C12~C20 reinforcing bars, the UHPC floorings at each independent lifting segment both ends Along bridge to reserved 300 millimeters~500 millimeters UHPC Cast-in-Situ Segments;Welded the top flange of beam in length and breadth of WELDING STUDS and haunch area and Arrangement prestress beam in length and breadth rib region set C12~C16 closed stirrups, arrangement prestress beam rib in length and breadth lay prestressing force Pipeline, the encryption reinforcing bar of the construction joint side arrangement reinforcement at prefabricated section is needed according to stress, after pouring into a mould ultra-high performance concrete UHPC Form prefabricated section.
(2) prefabricated section poured UHPC after, carry out 48 it is small when, 90 DEG C of insulations it is steam-cured to eliminate later stage contraction strain, and subtract Few time deformation.
(3) prefabricated U HPC floorings are made in the single lattice area that can be also formed as needed to longitudinal and cross beam, by step (2) Requirement it is steam-cured after prefabricated board is shelved on longitudinal and cross beam, 5cm can be used by shelving width, and shelving in width range to place 2 × 5cm rubber pads, are conserved by the requirement of step (2) after casting concrete.
(4) be transported under bridge and lift by crane cantilever or the spelling on stent for prefabricated section, in segment splicing seams steel member complete welding or Bolt postwelding, pours ultra-high performance concrete UHPC, carry out 48 it is small when, 90 DEG C of insulations are steam-cured (also can be according to result of calculation decision not Using steam curing), wet seam can also be done same processing by this step at the top flange of the longitudinal and cross beam in step (3).
Embodiment 2
As shown in FIG. 8 and 9, the present embodiment and the difference of embodiment 1 are:Wet seam is located at span centre position, often saves It is formed by connecting by the complete ultra-high performance concrete plate 11 of several piece for prefabricated section 15, adjacent two prefabricated sections 15 of ultra-high performance concrete A part for plate 11 is connected to form complete ultra-high performance concrete plate 11 by Cast-in-Situ Segment 16, and Cast-in-Situ Segment 16 is to use to have to cut The steel plate 9 of power nail 5 is formed after pouring into a mould ultra-high performance concrete again as the template of wet seam, therefore, each 500mm in construction joint both sides Cast-in-Situ Segment can also use the local UHPC combined bridge decks with WELDING STUDS in the range of left and right, when wet seam is sheared using bottom belt During the UHPC combined bridge decks of the steel plate of nail, its steel plate also can be as the template of wet seam while wet joint strength is strengthened.
Embodiment 3
As shown in FIG. 10 and 11, the present embodiment and the difference of embodiment 1 are:Wet seam is located at crossbeam and longeron 3 4 position of top flange, often save prefabricated section 15 and be formed by connecting by the complete ultra-high performance concrete plate 11 of several piece, Cast-in-Situ Segment 16 be with The connected ultra-high performance concrete plate linkage section of girder 1.
Embodiment 4
As shown in figure 12, the present embodiment and the difference of embodiment 1 are:Wet seam is located at span centre position, and often section is pre- Section 15 processed is formed by connecting by the complete ultra-high performance concrete plate 11 of several piece, and Cast-in-Situ Segment 16 is that the ultra-high performance concrete thickeied connects Crack structure, i.e. Cast-in-Situ Segment 16 are the ultra-high performance concrete plate linkage sections not being connected with girder 1.Therefore, construction joint both sides are each Cast-in-Situ Segment can also use the UHPC seam constructions thickeied in the range of 500mm or so
The embodiment not limited to this of the utility model, the above according to the present utility model, according to the general of this area Logical technological know-how and customary means, under the premise of the above-mentioned basic fundamental thought of the utility model is not departed from, the utility model may be used also To make the modification of other diversified forms, replacement or change, all fall within the utility model rights protection scope.

Claims (10)

  1. A kind of 1. ultra-high performance concrete floorings, it is characterised in that:It is the ultra-high performance concrete plate by being arranged in array Composition is connected as one, the bottom surface of the ultra-high performance concrete plate is groove-like, which is flat in gradually including from top to bottom Flat truncated rectangular pyramids shape, is equipped with what is linked into an integrated entity by the reinforcing bar set along two stress principal directions in ultra-high performance concrete plate Bar-mat reinforcement, the linkage section between adjacent two ultra-high performance concretes plate is ultra-high performance concrete plate linkage section, all or part of Ultra-high performance concrete plate linkage section be connected with the internals of the girder below the floorings.
  2. 2. ultra-high performance concrete floorings according to claim 1, it is characterised in that:The internals of the girder is Crossbeam and longeron, the crisscross formation network of crossbeam and longeron, every block of ultra-high performance concrete plate are located at a net On lattice and ultra-high performance concrete plate linkage section is connected with the top flange of crossbeam and longeron, is set on the top flange of crossbeam and longeron There is WELDING STUDS.
  3. 3. ultra-high performance concrete floorings according to claim 2, it is characterised in that:The top flange of longitudinal and cross beam with Haunch area is formed between adjacent two blocks of ultra-high performance concrete plates, closed stirrups are equipped with the haunch area, and in haunch area In have additional transverse bar or vertical muscle, the closed stirrups cuff is on the transverse steel or longitudinal reinforcement through haunch area.
  4. 4. ultra-high performance concrete floorings according to claim 3, it is characterised in that:The floorings are mainly by prefabricated Section and Cast-in-Situ Segment composition, adjacent two prefabricated sections are connected by Cast-in-Situ Segment, in the encryption steel of prefabricated section of construction joint side arrangement reinforcement Muscle, prefabricated section is formed after pouring into a mould ultra-high performance concrete;Between adjacent two prefabricated sections along bridge to being reserved with Cast-in-Situ Segment, it is described existing It is wet seam that section, which is poured, before ultra-high performance concrete is poured into a mould.
  5. 5. ultra-high performance concrete floorings according to claim 4, it is characterised in that:The wet seam be located at crossbeam and The top flange position of longeron, often saves prefabricated section and is formed by connecting by the complete ultra-high performance concrete plate of several piece, the Cast-in-Situ Segment is The ultra-high performance concrete plate linkage section being connected with girder.
  6. 6. ultra-high performance concrete floorings according to claim 4, it is characterised in that:The wet seam is located at span centre position Put, often save prefabricated section and be formed by connecting by the complete ultra-high performance concrete plate of several piece, adjacent two prefabricated sections of very-high performance coagulation A part for native plate is connected to form complete ultra-high performance concrete plate by Cast-in-Situ Segment, and the Cast-in-Situ Segment is mixed by very-high performance Solidifying soil cast forms.
  7. 7. ultra-high performance concrete floorings according to claim 4, it is characterised in that:The wet seam is located at span centre position Put, often save the prefabricated section of complete ultra-high performance concrete plate being connected by several piece and the ultra-high performance concrete plate positioned at its avris A part be formed by connecting, a part for adjacent two prefabricated sections of ultra-high performance concrete plate is connected to form completely by Cast-in-Situ Segment Ultra-high performance concrete plate, the Cast-in-Situ Segment is to use to pour into a mould superelevation again as the template of wet seam with the steel plate of WELDING STUDS Part UHPC combined bridge decks are formed after performance concrete.
  8. 8. ultra-high performance concrete floorings according to claim 4, it is characterised in that:The wet seam is located at span centre position Put, often save prefabricated section and be formed by connecting by the complete ultra-high performance concrete plate of several piece, the Cast-in-Situ Segment is the very-high performance thickeied Concrete joint structure, i.e., described Cast-in-Situ Segment are the ultra-high performance concrete plate linkage sections not being connected with girder.
  9. 9. according to claim 5~8 any one of them ultra-high performance concrete floorings, it is characterised in that:In very-high performance Anchoring has prestressed strand in concrete slab linkage section, and the prestressed strand is passed through in ultra-high performance concrete plate linkage section The prestress pipe of laying, closed stirrups are additionally provided with ultra-high performance concrete plate linkage section.
  10. 10. ultra-high performance concrete floorings according to claim 9, it is characterised in that:The girder is closed steel case Combination beam, I steel composite beam or steel truss combination beam.
CN201721211268.5U 2017-09-20 2017-09-20 A kind of ultra-high performance concrete floorings Active CN207362695U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721211268.5U CN207362695U (en) 2017-09-20 2017-09-20 A kind of ultra-high performance concrete floorings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721211268.5U CN207362695U (en) 2017-09-20 2017-09-20 A kind of ultra-high performance concrete floorings

Publications (1)

Publication Number Publication Date
CN207362695U true CN207362695U (en) 2018-05-15

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ID=62348879

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Application Number Title Priority Date Filing Date
CN201721211268.5U Active CN207362695U (en) 2017-09-20 2017-09-20 A kind of ultra-high performance concrete floorings

Country Status (1)

Country Link
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