CN209129253U - A kind of air entrained concrete tongue and groove contignation with ribbing - Google Patents
A kind of air entrained concrete tongue and groove contignation with ribbing Download PDFInfo
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- CN209129253U CN209129253U CN201821753340.1U CN201821753340U CN209129253U CN 209129253 U CN209129253 U CN 209129253U CN 201821753340 U CN201821753340 U CN 201821753340U CN 209129253 U CN209129253 U CN 209129253U
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- longitudinal rib
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Abstract
A kind of air entrained concrete tongue and groove contignation with ribbing, by precast aerated concrete matchboard (1), longitudinal rib (2), bolt connection piece (3) and fashioned iron support (4) collectively constitute, it is close to longitudinal rib (2) upper surface in precast aerated concrete matchboard (1) bottom surface, the two length is identical, it combines the two to form floor entirety by the bolt connection piece (3) that rubber packing (33) have been wrapped up in outside, the longitudinal rib (2) of floor rides upon on fashioned iron support (4), fashioned iron support (4) is fixed on load bearing wall (5), form assembly system.It is low that the utility model solves aerated concrete floor slab bending stiffness, span ability is insufficient, the assembly of floor tongue and groove position horizontal direction is inconvenient, the defects of two kinds of combinations of materials are also easy to produce temperature stress, with light weight, shock resistance is good, industrialized production degree height, assembling degree height, wet-less operation, the overall merit detachably reused, can be applied to civil construction field.
Description
Technical field
The utility model relates to a kind of fabricated construction, especially a kind of air entrained concrete tongue and groove contignation with ribbing belongs to
In civil engineering structure field.
Background technique
Assembled architecture utilizes industrialized production, prefabricated construction, stablize with high production efficiency, low cost, quality etc.
Advantage, air entrained concrete and glued bamboo and wood materials are all industrialized production product, air entrained concrete low, green ring with price
The advantages that guarantor, light weight, heat-and sound-insulating, fire resisting, impervious, antidetonation, but its tension, anti-bending strength are poor, is chiefly used in wallboard and small
Span floor.Glued bamboo and wood materials, as the green material of a new generation, have raw material using bamboo wood or timber as raw material
Fast-growing easily takes, and processing technology is mature, and process low consumption, the advantages such as material ratio of strength to weight height, it is low that but there is also elasticity modulus, structure
The defects of section rigidity is small, and deflection deformation is big, the bearing capacity and span ability for promoting air entrained concrete and glued bamboo and wood are to add
Two or more combinations of materials are commonly present storeroom by the protrusion technical problem of gas concrete and glued bamboo and wood application, composite structure
Temperature stress action breaks down caused by linear expansion coefficient is different, in addition, tongue and groove floor prefabricated construction with ribbing requires component energy water
It moves flat and realizes tongue and groove connection, plain edition bridle iron is unable to satisfy requirement and often needs the operations such as cutting, welding, complex process.
Currently, it there are the solution of multi-combined structure, such as Chinese patent " ZL 201120387846.7 " number, mentions
The combination for having gone out a kind of armored concrete and bamboo wood, the high pressure resistance for taking full advantage of armored concrete can be with the height of bamboo wood
Tensile property solves the problems, such as that shaped structural section rigidity is small, improves the bearing capacity of bamboo structure, however, regular reinforcement coagulation
Soil has from great significant drawback, runs counter to the characteristic of bamboo wood high-strength light.For another example Chinese patent " ZL
201510644170.8 " numbers, a kind of assembled bamboo-air entrained concrete composite structure and production method are proposed, solves bamboo knot
The defects of structure bending stiffness is low, and span ability is insufficient, but its connection needs cast-in-place concrete connection upper node, adhesive connection
Lower part node, complicated construction technique, speed is slow, is not suitable on floor system.
Summary of the invention
The purpose of the utility model is to provide a kind of air entrained concrete tongue and groove contignations with ribbing, are combined by multiple material
Overcome existing aerated concrete floor slab bending stiffness insufficient, span ability is insufficient, the low disadvantage of rate of utilization of strength, by type
Hinge is designed on bridle iron and overcomes tongue and groove floor horizontal direction tongue and groove connection difficult problem with ribbing, by designing rubber in bolt surface
Temperature stress problems in role caused by linear expansion coefficient difference between overcoming different materials is padded, while improving and resisting under dynamic loading
Impact property and anti-seismic performance are embedded in Concrete Design by bolt surface and realize that slab surfaces are smooth, have light weight, antidetonation
Property good, industrialized production degree is high, assembling degree height, wet-less operation, the overall merit detachably reused, be suitable for
The floor of building structure and temporary facility.
The technical solution of the utility model are as follows: a kind of air entrained concrete tongue and groove contignation with ribbing, by prefabricated aerating coagulation
Native matchboard, longitudinal rib, bolt connection piece and fashioned iron support collectively constitute, and feature is in longitudinal rib arranged for interval in prefabricated aerating coagulation
Part fastening is bolted in native matchboard bottom, the two, and bolt connection piece periphery is enclosed with rubber packing, and longitudinal rib is along length side
Both ends are provided with fashioned iron support, fashioned iron support is fixed on load bearing wall, forms assembly system, the precast aerated concrete
Two sides open up tongue and groove groove and tongue and groove protrusion to matchboard respectively along longitudinal direction, and surface is provided with the reserved of the variable cross-section of several perforations
Hole, variable cross-section shape, the size of the reserved opening are corresponding with the specification of bolt connection piece, the reserving hole position of longitudinal rib
Set, the reserved opening of quantity and aperture and precast aerated concrete matchboard corresponds, the steel plate of fashioned iron support side passes through
Hinge connection, can free-open-close, be provided with reserved screw hole on the side steel plate of free-open-close, by interting screw, tighten
Nut fixes longitudinal rib and fashioned iron support.
A kind of air entrained concrete tongue and groove contignation with ribbing of the utility model, engineered wood or engineering bamboo longitudinal rib are located at section
The tensile region of lower part, can give full play to the high characteristic of its tensile strength, and precast aerated concrete matchboard is located at section top
Compressive region can give full play to concrete anti-compression performance, and using bolt by two kinds of combinations of materials, simple process, screw rod upper end is embedding
Enter in plate, surfacing, rubber packing is had in the middle part of screw rod, stress raisers can be reduced, improves anti-impact under dynamic loading
Performance is hit, fashioned iron support has hinge, when hinge side plate is opened, plate tongue and groove horizontal direction can be facilitated to splice, and after splicing in place, closes
Hinge side plate, support connection is reliable convenient, and in general, the utility model structure integrally shows bearing capacity height, rigidity greatly, again
Amount is light, insulates against sound, heat-insulated comprehensive performance good, anti-seismic performance is good.
The side edge of the longitudinal rib is flushed with the bottom plate side edge of fashioned iron support, and longitudinal rib material is veneer(ed) wood or gluing
Bamboo wood, longitudinal rib quantity are two or more, longitudinal rib width 100mm~150mm, length 2m~8m, thickness 50mm~80mm.
The longitudinal pitch of the reserved opening is 400mm~500mm.
Longitudinal length 2m~8m of the precast aerated concrete matchboard, width 0.5m~0.8m, thickness 100mm~
150mm。
The expansion end of the bolt connection piece is cylindrical shape, cylinder size and reserved opening top enlarged hole
Mouth size is consistent, and the upper surface of precast aerated concrete matchboard is smooth.
The rubber packing is round tube columnar structure, and internal diameter is identical as screw diameter, and outer diameter is identical as reserved opening diameter,
Thickness 1mm~5mm, the length of rubber packing are the sum of lower depth and depth of reserving hole of reserved opening.
In implementation method, the precast aerated concrete matchboard, longitudinal rib, bolt connection piece and fashioned iron branch of the utility model
Seat is prefabricated in advance or processing, and the side plate of hinge can open and close freely, allow modular level move into fashioned iron support with
Adjacent members carry out tongue and groove connection, and using bolt connection piece as member-connecting partthe, fashioned iron support is the connection of component and load bearing wall
Precast aerated concrete matchboard, longitudinal rib, bolt connection piece, fashioned iron support and load bearing wall joint connection in site are formed as whole by component
Body structure system, its step are as follows:
A, it processes precast aerated concrete matchboard: being alongst spaced setting in precast aerated concrete matchboard
The reserved opening penetrated through from top to bottom, it is straight that reserved opening top enlarged diameter, depth are equal to bolt connection piece expansion end
Diameter, thickness, reserved opening lower diameter are equal to the rubber packing outer diameter of package screw rod；
B, process longitudinal rib: longitudinal rib open up with precast aerated concrete matchboard corresponding position penetrate through from top to bottom it is pre-
It boxes out hole, reserving hole diameter is equal to reserved opening diameter；
C, it assembles air entrained concrete tongue and groove floor with ribbing: the screw rod of bolt connection piece is passed through into precast aerated concrete tongue and groove
The corresponding reserving hole of reserved opening and longitudinal rib of plate is tightened pin nut with the screw end head for being pierced by longitudinal rib bottom, bolt
Connector expands end and is embedded in reserved opening enlarged, screw tip and precast aerated concrete matchboard flush, shape
Integral air entrained concrete matchboard with ribbing is whole；
D, mount type bridle iron: by fashioned iron support be fixed on load bearing wall by expansion bolt or by on load bearing wall
Built-in fitting is weldingly fixed on load bearing wall；
E, air entrained concrete tongue and groove floor with ribbing: the side plate of opening hinge, the longitudinal rib for the floor lower part being completed is assembled
A part of bottom surface rides over fashioned iron base-plate upper surface and moves horizontally from one side of hinge to fashioned iron support fixed side panel side, makes
Tongue and groove groove and another piece of precast aerated concrete matchboard tongue and groove protrusion horizontal direction closed on are in clamping connection simultaneously, longitudinal rib bottom surface
It being ridden upon on fashioned iron base-plate completely, longitudinal rib side edge and fashioned iron base-plate side edge-justified calibrations close the side plate of hinge,
Screw, tightening nuts are inserted into reserved screw rod hole site from bottom to top, and the longitudinal rib of board bottom rides upon on fashioned iron support, and fashioned iron support is solid
It is scheduled on load bearing wall, forms assembly system.
Entire air entrained concrete tongue and groove floor with ribbing and assembly system are split as precast aerated concrete by the utility model
Matchboard, longitudinal rib, bolt connection piece and fashioned iron support etc., these composition components shift to an earlier date prefabricated or processing, are successively pacified by scene
Each composition component is filled, the assembly of entire air entrained concrete tongue and groove floor with ribbing and its system, entire assembling process, without big are completed
Type construction machinery, no on-site wet operation amount, realizes industrialized production.
The utility model advantage is significant, has the advantages that
(1) relative to ordinary air-entrained concrete floor, the section bending stiffness of component has been significantly increased, has improved building
Plate span ability, a variety of materials all play the mechanical property of its own.
(2) relative to common bamboo-concrete combined structure, discrete type bolt effectively provides longitudinal rib and prefabricated aerating coagulation
Longitudinal resistant slide power between native plate and it is anti-start power, in the insert plate of screw rod upper end, surfacing has rubber in the middle part of screw rod
Liner can reduce stress raisers, improve shock resistance under dynamic loading, and structural units's weight bearing power obtains substantially
Degree improves, and has simple process, detachably reuses, is light-weight, insulating against sound, heat-insulated comprehensive advantage good, anti-seismic performance is good.
(3) air entrained concrete tongue and groove floor with ribbing utilizes bamboo wood, this kind of ecological environment-friendly materials of timber, alleviates steel etc.
Resource it is in short supply, the manufacturing process of lightweight aerated concrete utilizes solid waste, pollutes small, low energy consumption, environmental benefit
It is high.
(4) by the way of prefabrication and assembly construction, tongue and groove designs assembled effect for air entrained concrete tongue and groove floor with ribbing and its system
Good, fashioned iron support has hinge, when hinge side plate is opened, plate tongue and groove horizontal direction can be facilitated to splice, and after splicing in place, closes hinge
Side plate, support connection is reliable convenient, and in the insert plate of screw rod upper end, surfacing, screw rod middle part has rubber packing, can reduce
Stress raisers, industrialized production, prefabricated construction, no on-site wet operation amount shorten the duration, ensure that quality.
Detailed description of the invention
Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model
It encloses.
A kind of air entrained concrete tongue and groove contignation stereoscopic schematic diagram with ribbing of Fig. 1；
A kind of air entrained concrete tongue and groove with ribbing floor level figure of Fig. 2；
A kind of Section A-A figure of air entrained concrete tongue and groove floor with ribbing of Fig. 3；
A kind of D-D sectional view of air entrained concrete tongue and groove floor with ribbing of Fig. 4；
A kind of section B-B figure of air entrained concrete tongue and groove floor with ribbing of Fig. 5；
A kind of C-C sectional view of air entrained concrete tongue and groove floor with ribbing of Fig. 6；
A kind of bolt connection piece stereoscopic schematic diagram of air entrained concrete tongue and groove floor with ribbing of Fig. 7；
A kind of fashioned iron support stereoscopic schematic diagram of air entrained concrete tongue and groove contignation with ribbing of Fig. 8；
A kind of air entrained concrete tongue and groove contignation assembly method flow chart with ribbing of Fig. 9；
Figure 10 processes precast aerated concrete matchboard schematic diagram；
Figure 11 processes longitudinal rib schematic diagram；
Figure 12 assembles air entrained concrete tongue and groove floor schematic diagram with ribbing；
Figure 13 mount type bridle iron schematic diagram；
Figure 14 assembles air entrained concrete tongue and groove floor system schematic diagram with ribbing；
Schematic diagram is completed in Figure 15 air entrained concrete tongue and groove floor system assembly with ribbing.
It in the accompanying drawings, is precast aerated concrete matchboard by 1,2 be longitudinal rib, and 3 be bolt connection piece, and 4 be fashioned iron support,
5 be load bearing wall, and 11 be tongue and groove groove, and 12 be tongue and groove protrusion, and 13 be reserved opening, and 21 be reserving hole, and 31 be screw rod, and 32 be pin
Bolt nut, 33 be rubber packing, and 41 be hinge, and 42 be reserved screw hole, and 43 be screw, and 44 be nut.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now compareing Detailed description of the invention
Specific embodiment of the present utility model.
Such as attached drawing, the utility model provides a kind of air entrained concrete tongue and groove contignation with ribbing, by precast aerated concrete
Matchboard 1, longitudinal rib 2, bolt connection piece 3 and fashioned iron support 4 collectively constitute, and feature is in 2 arranged for interval of longitudinal rib in prefabricated aerating
The fastening of part 3 is bolted in 1 bottom of concrete match board, the two, and 3 periphery of bolt connection piece is enclosed with rubber packing 33, indulges
Both ends are provided with fashioned iron support 4 to rib 2 along its length, and fashioned iron support 4 is fixed on load bearing wall 5, form assembly system, described
Two sides open up tongue and groove groove 11 and tongue and groove protrusion 12 to precast aerated concrete matchboard 1 respectively along longitudinal direction, if surface is provided with
The reserved opening 13 of the variable cross-section of dry perforation, the rule of the variable cross-section shape of the reserved opening 13, size and bolt connection piece 3
Lattice are corresponding, 21 position of reserving hole, quantity and the aperture of longitudinal rib 2 and the reserved opening 13 of precast aerated concrete matchboard 1
Correspond, the steel plate of 4 side of fashioned iron support is connected by hinge 41, can free-open-close, on the side steel plate of free-open-close
It is provided with reserved screw hole 42, by interting screw 43, tightening nuts 44 are fixed by longitudinal rib 2 and fashioned iron support 4.
The side edge of longitudinal rib 2 is flushed with the bottom plate side edge of fashioned iron support 4, and 2 material of longitudinal rib is veneer(ed) wood or cemented bamboo
Material, 2 quantity of longitudinal rib are two or more, longitudinal rib 2 width 100mm~150mm, length 2m~8m, thickness 50mm~80mm.
The longitudinal pitch of reserved opening 13 is 400mm~500mm.
Longitudinal length 2m~8m of precast aerated concrete matchboard 1, width 0.5m~0.8m, thickness 100mm~
150mm。
The expansion end of bolt connection piece 3 is cylindrical shape, cylinder size and 13 top enlarged hole of reserved opening
Size is consistent, and the upper surface of precast aerated concrete matchboard 1 is smooth.
Rubber packing 33 is round tube columnar structure, and internal diameter is identical as 31 diameter of screw rod, and outer diameter is identical as 13 diameter of reserved opening,
Thickness 1mm~5mm, the length of rubber packing 33 are the lower depth of reserved opening 13 and the sum of the depth of reserving hole 21.
In implementation method, the precast aerated concrete matchboard 1, longitudinal rib 2, bolt connection piece 3 and type of the utility model
Bridle iron 4, which shifts to an earlier date prefabricated or processing, the side plate of hinge 41, freely to be opened and closed, and modular level is allowed to move into fashioned iron
Support 4 and adjacent members carry out tongue and groove connection, are member-connecting partthe with bolt connection piece 3, and fashioned iron support 4 is component and load-bearing
The connecting component of wall 5 shows precast aerated concrete matchboard 1, longitudinal rib 2, bolt connection piece 3, fashioned iron support 4 and load bearing wall 5
Field connection is formed as integral structural system, and its step are as follows:
A, it processes precast aerated concrete matchboard: being alongst spaced and set in precast aerated concrete matchboard 1
The reserved opening 13 penetrated through from top to bottom is set, 13 top enlarged diameter of reserved opening, depth expand equal to bolt connection piece 3
Tip diameter, thickness, 13 lower diameter of reserved opening are equal to 33 outer diameter of rubber packing of package screw rod 31；
B, it processes longitudinal rib: opening up in longitudinal rib 2 and 1 corresponding position of precast aerated concrete matchboard and penetrate through from top to bottom
Reserving hole 21,21 diameter of reserving hole are equal to 13 diameter of reserved opening；
C, it assembles air entrained concrete tongue and groove floor with ribbing: the screw rod 31 of bolt connection piece 3 is passed through into precast aerated concrete
The reserved opening 13 and the corresponding reserving hole 21 of longitudinal rib 2 of matchboard 1, by pin nut 32 and the screw rod for being pierced by 2 bottom of longitudinal rib
31 ends are tightened, and bolt connection piece 3 expands end and is embedded in 13 enlarged of reserved opening, 31 top of screw rod and prefabricated aerating coagulation
It is whole to form whole air entrained concrete matchboard with ribbing for native 1 flush of matchboard；
D, mount type bridle iron: by fashioned iron support 4 be fixed on load bearing wall 5 by expansion bolt or by with load bearing wall 5
On built-in fitting be weldingly fixed on load bearing wall 5；
E, air entrained concrete tongue and groove floor with ribbing: the side plate of opening hinge 41 is assembled, the floor lower part being completed is indulged
It is horizontal from 41 1 side of hinge to 4 fixed side panel side of fashioned iron support that a part of 2 bottom surface of rib rides over 4 plate upper surface of fashioned iron support
It is mobile, it is in clamping connection tongue and groove groove 11 with raised 12 horizontal directions of another piece of 1 tongue and groove of precast aerated concrete matchboard closed on
Meanwhile 2 bottom surface of longitudinal rib is ridden upon completely on 4 bottom plate of fashioned iron support, 2 side edge of longitudinal rib and 4 bottom plate side edge-justified calibrations of fashioned iron support,
The side plate for closing hinge 41, is inserted into screw 43, tightening nuts 44, the longitudinal rib 2 of board bottom in reserved 42 position of screw hole from bottom to top
It rides upon on fashioned iron support 4, fashioned iron support 4 is fixed on load bearing wall 5, forms assembly system.
The material that the utility model utilizes has the characteristics that lightweight, energy conservation and environmental protection, and it is green that bamboo wood or timber are that fast-growing easily takes
Color ecomaterial, air entrained concrete manufacture, transport, use process is pollution-free, can protect arable land, energy-saving, this is practical newly
Type solves the defects of aerated concrete floor slab bending stiffness is low, span ability is insufficient, overcomes tongue and groove floor horizontal direction with ribbing
Tongue and groove connects difficult problem, overcomes temperature stress problems in role caused by linear expansion coefficient is different between different materials, passes through bolt
Surface is embedded in Concrete Design and realizes that slab surfaces are smooth, in implementation method, is advantageously implemented industrialized production, assembling is applied
Work has good economy and practicability.The scope of the utility model is not limited by the examples described above, as long as this is practical
The same variation and modification that novel claim and description are done, should all belong to the model that the utility model patent covers
In enclosing.
Claims (6)
1. a kind of air entrained concrete tongue and groove contignation with ribbing, it is characterised in that by precast aerated concrete matchboard (1), longitudinal rib
(2), bolt connection piece (3) and fashioned iron support (4) collectively constitute, and longitudinal rib (2) arranged for interval is in precast aerated concrete matchboard
(1) part (3) fastening is bolted in bottom, the two, and bolt connection piece (3) periphery is enclosed with rubber packing (33), longitudinal rib (2)
Both ends are provided with fashioned iron support (4) along its length, and fashioned iron support (4) is fixed on load bearing wall (5), form assembly system, in advance
Two sides open up tongue and groove groove (11) to air entrained concrete matchboard (1) processed respectively along longitudinal direction and tongue and groove is raised (12), surface setting
There are the reserved opening (13) of the variable cross-section of several perforations, variable cross-section shape, size and the bolt connection piece (3) of reserved opening (13)
Specification it is corresponding, reserving hole (21) position, quantity and the aperture of longitudinal rib (2) and precast aerated concrete matchboard (1)
Reserved opening (13) corresponds, and the steel plate of fashioned iron support (4) side is connected by hinge (41), can free-open-close, freedom
Reserved screw hole (42) are provided on the side steel plate of folding, by intert screw (43), tightening nuts (44) by longitudinal rib (2) with
Fashioned iron support (4) is fixed.
2. a kind of air entrained concrete tongue and groove contignation with ribbing according to claim 1, it is characterised in that the side of longitudinal rib (2)
Edge is flushed with the bottom plate side edge of fashioned iron support (4), and longitudinal rib (2) material is veneer(ed) wood or glued bamboo material, longitudinal rib (2) quantity
For two or more, longitudinal rib (2) width 100mm~150mm, length 2m~8m, thickness 50mm~80mm.
3. a kind of air entrained concrete tongue and groove contignation with ribbing according to claim 1, it is characterised in that reserved opening
(13) longitudinal pitch is 400mm~500mm.
4. a kind of air entrained concrete tongue and groove contignation with ribbing according to claim 1, it is characterised in that prefabricated aerating is mixed
Longitudinal length 2m~the 8m, width 0.5m~0.8m, thickness 100mm~150mm of solidifying soil matchboard (1).
5. a kind of air entrained concrete tongue and groove contignation with ribbing according to claim 1, it is characterised in that bolt connection piece
(3) expansion end is cylindrical shape, and cylinder size is consistent with reserved opening (13) top enlarged dimension of opening, prefabricated to add
The upper surface of gas concrete match board (1) is smooth.
6. a kind of air entrained concrete tongue and groove contignation with ribbing according to claim 1, it is characterised in that rubber packing
It (33) is round tube columnar structure, internal diameter is identical as screw rod (31) diameter, and outer diameter is identical as reserved opening (13) diameter, thickness 1mm~
5mm, the length of rubber packing (33) are the lower depth of reserved opening (13) and the sum of the depth of reserving hole (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821753340.1U CN209129253U (en) | 2018-10-23 | 2018-10-23 | A kind of air entrained concrete tongue and groove contignation with ribbing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201821753340.1U CN209129253U (en) | 2018-10-23 | 2018-10-23 | A kind of air entrained concrete tongue and groove contignation with ribbing |
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| CN209129253U true CN209129253U (en) | 2019-07-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162397A (en) * | 2018-10-23 | 2019-01-08 | 南京林业大学 | A kind of air entrained concrete tongue and groove floor system with ribbing and assembly method |
-
2018
- 2018-10-23 CN CN201821753340.1U patent/CN209129253U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162397A (en) * | 2018-10-23 | 2019-01-08 | 南京林业大学 | A kind of air entrained concrete tongue and groove floor system with ribbing and assembly method |
| CN109162397B (en) * | 2018-10-23 | 2024-03-05 | 南京林业大学 | Ribbed aerated concrete tongue-and-groove floor system and assembly method |
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Assignee: Hefei Shuang Dao run Highway Engineering Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000058 Denomination of utility model: A kind of air entrained concrete tongue and groove contignation with ribbing Granted publication date: 20190719 License type: Common License Record date: 20190912 Assignee: Zhenjiang Heng An Civil Technology Co., Ltd. Assignor: Nanjing Forestry University Contract record no.: X2019320000057 Denomination of utility model: A kind of air entrained concrete tongue and groove contignation with ribbing Granted publication date: 20190719 License type: Common License Record date: 20190912 Assignee: Limited by Share Ltd Beijing nine road detection technology Assignor: Nanjing Forestry University Contract record no.: X2019320000056 Denomination of utility model: A kind of air entrained concrete tongue and groove contignation with ribbing Granted publication date: 20190719 License type: Common License Record date: 20190912 |