CN106193454A - A kind of permanent template of post ultra-high performance concrete and preparation method thereof - Google Patents
A kind of permanent template of post ultra-high performance concrete and preparation method thereof Download PDFInfo
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- CN106193454A CN106193454A CN201610612752.2A CN201610612752A CN106193454A CN 106193454 A CN106193454 A CN 106193454A CN 201610612752 A CN201610612752 A CN 201610612752A CN 106193454 A CN106193454 A CN 106193454A
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- performance concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses the permanent template of a kind of post ultra-high performance concrete, including outside ultra-high performance concrete layer and the tubular permanent template steel reinforcement cage that is arranged concentrically the most successively, template in the steel of molding, core concrete reserved steel bar cage, connection permanent template steel reinforcement cage and the steel tie of core concrete reserved steel bar cage it is evenly arranged with in template mutual vertically in described steel, above-mentioned permanent template steel reinforcement cage, space between template is filled in steel outside ultra-high performance concrete layer, described permanent template steel reinforcement cage is wrapped in outside ultra-high performance concrete layer, the present invention provides the permanent template preparation method of this post ultra-high performance concrete simultaneously.Present invention eliminates template and numerous and diverse operational procedure of field cast-in-place concrete arrangement of reinforcement again in dismounting, simultaneously by concrete layer inside and outside the transverse steel drawknot of template in steel, improve bond between tradition permanent template and cast-in-place concrete hypodynamic drawback, and excellent in te pins of durability.
Description
Technical field
The invention belongs to building material technical field, particularly to a kind of post ultra-high performance concrete permanent template and
Preparation method.
Background technology
When carrying out concreting, need to use template to obtain the concrete component of design shape.The most all adopt
By templates such as wooden model, punching block, aluminium alloy moulds, installation form, concrete before casting concrete, is needed to need after reaching intensity to remove mould
Plate.Form work engineering is the important component part of concrete structure construction, long construction period, costly.
After World War II, for improving speed of application, developing permanent template, template is not removed, as the one of structure after using
Part uses.Permanent template, due to its easy construction, is saved the duration, has been started progressively to be applied in all kinds of concrete works.
Not only there is the support molding function meeting casting concrete, the member-retaining portion in building structure can be become again, both may participate in and built
Build thing load-bearing, stress performance and the serviceability of structure can be improved again.According to the needs of building, permanent formwork can also be attached
Band have waterproof, insulation, heat insulation, insulate against sound, decorate, improve durability, reduce the function such as the number of turnover, accomplish one-shot forming, save
But the operation such as sand finish, levelling, secondary decoration, waterproof thermal-insulated process, surface layer fitting-up, thus work can be greatly saved
Journey construction momentum and decoration, decoration cost.Owing to permanent formwork need not form removal, can save a large amount of due to form removal with have bad luck
Time spent by template and expense, highly shortened the duration, reduces construction costs, and reduces the labor intensity of workman.
The most external permanent template mainly has following several form: (1) ICT heat insulation formwork, is to assist at american concrete
A new technique of lower positive application can be promoted, and define " the new concrete structure residential body with technique as core
System ".(2) SRC structure construction is without support shuttering, this be one be exclusively used in that steel composite construction (SRC) constructs permanent
Template, owing to being made by factory process now, production efficiency is high, and Product Precision is ensured, and without supporting.(3) prefabricated height
Strength mortar thin-walled template, by the exploitation of Xi Song company of Japan, inner side is provided with shear connector and is processed to form male and fomale(M&F), watering through scene
Build concrete, it is ensured that molding integrated member.(4) concrete prefabricated column mould, high-strength for adaptation by the exploitation of great Lin group company of Japan
Concrete requires and the concrete prefabricated column mould of research design, and its molding mode has two kinds: centrifugal casting and the inflow method of forming.
Since the nineties in 20th century, China's architectural structure system achieves huge development, along with skyscraper and superelevation
A large amount of constructions of layer building, and the developing rapidly of large-scale capital construction, urban transportation and highway, the building of China
Construction technology makes great progress, the template of Building Trade in China the most constantly Introduced From Abroad, scaffold system, and develops
All kinds of permanent new type formworks, main research has: (1) uses FRP(fiber-reinforced polymer) as concrete works forever
The feature that property template, fiberglass tensile strength and shock resistance are high for a long time effectively compensate for the feature that concrete tensile strength is low,
The rupture strength of beam can be increased substantially.(2) steel-wire-net reinforced concrete thin plate template, is the steel fiber reinforced concrete structure of a kind of broad sense
Part, intensity is high, Elastoplastic Performances in Simulation is high, and durability is high.(3) Ribbed shuttering steel concrete compoboard, overcomes widely used
The deficiency of version that combines with steel-concrete combination beam as bed die of profiled sheet, improve dramatically
The ductility of component.
In recent years, along with the development of ultra-high performance concrete, the most also carry out ultra-high performance concrete permanent template
Research, the RPC of the most more research.
2005, Beijing Jiaotong University's clock prunus mume (sieb.) sieb.et zucc. forever comprcssive strength based on RPC superelevation, activity powder is proposed
End concrete permanent template, the compressive mechanical property of its component is superior, and construction technology has had the biggest improvement, the tension of single member
Mechanical property in terms of anti-folding has been short of, and requires further improvement.
Mixing of steel fiber in ultra-high performance concrete, can effectively overcome High Strength Concrete Under Compressive Cyclic Loading intensity high and tension,
The defect of fracture resistance difference.Harbin Institute of Technology and Institutes Of Technology Of Changsha all carried out the material of steel fibre high performance concrete
Experiments of Machanics, have higher Research Significance and future in engineering applications.
Ultra-high performance concrete permanent template molding at present mainly has two ways, centrifuging and casting method.
But during centrifugal forming ultra-high performance concrete permanent template, owing to ultra-high performance concrete not having coarse aggregate
Stopping, the steel fibre that density is bigger can be concentrated the outer layer being distributed in permanent template under the action of the centrifugal, even cause steel fibre big
Amount is exposed to outer surface, and corrosion is so that the performance such as resistance fragility, toughness and durability of ultra-high performance concrete reduces.With
Time, the steel fibre of uneven distribution can cause the mechanical heterogeneity of ultra-high performance concrete component, and outer layer permanent template mixes
Solidifying soil globality is destroyed, and increases the uncertain factor of element bearing capacity, the component strength design that impact is relevant, also drops simultaneously
Low component shearing resistance and the ability of Bend.These problems above-mentioned, can make the ultra-high performance concrete component being centrifuged use
Time safety, durability or even bearing capacity can not reach intended purpose, the safety of Structural Engineering is threatened.
During casting method molding, owing to ultra-high performance concrete degree of compaction is the highest, the ultra-high performance concrete permanent template demoulding
Rear inner surface unusual light, during use permanent template with after water the imperfect bonding of wadding weft variation, can frequently result in bi-material
Can not collaborative work, cracking load is too low, it is impossible to gives full play to the performance of material, occurs crack too early, causes durability to decline,
Especially under cyclic reverse loading, both each work even more serious, and mechanical property is substantially reduced.
Summary of the invention
Present invention aim at providing the permanent template of a kind of post ultra-high performance concrete, dismounting molding can be saved permanent
The interior template of template and scene are numerous and diverse operational procedure of core concrete assembling reinforcement again, simultaneously by template in steel
Steel tie drawknot inside and outside concrete layer, improve and bond hypodynamic drawback between tradition permanent template and cast-in-place concrete.
A kind of permanent template of post ultra-high performance concrete, including outside ultra-high performance concrete layer and the most successively
The tubular permanent template steel reinforcement cage that is arranged concentrically, in the steel of molding template, core concrete reserved steel bar cage, in described steel
Connection permanent template steel reinforcement cage and the steel tie of core concrete reserved steel bar cage it is evenly arranged with mutual vertically in template,
Filling outside ultra-high performance concrete layer in space between template in above-mentioned permanent template steel reinforcement cage, steel, described is permanent
Template steel reinforcement cage is wrapped in outside ultra-high performance concrete layer.
Further, described steel tie uses the deformed bar of a diameter of 6 ~ 20mm, and along permanent template length direction
Every 1 meter of minimum layout four.
Further, described permanent template steel reinforcement cage, core concrete reserved steel bar cage all use with template in steel and weld
Form entirety.
Further, in described steel between template and steel tie, permanent template steel reinforcement cage and core concrete reserve steel
Between muscle cage and steel tie, welding is all used to be connected with each other.
Further, in described steel, template cross section is not for round, and it is concavo-convex to there is the fluctuating within 5mm.
Further, ultra-high performance concrete layer has superhigh intensity and superelevation durability, comprcssive strength more than 130MPa,
Charge value is less than 40C.
Further, described ultra-high performance concrete layer thickness is not less than 35mm.
Further, described steel reinforcement cage includes some stirrups, is uniformly arranged along permanent template length direction and connects each hoop
The longitudinal reinforcement of muscle.
Further, the described permanent template stirrup distance away from ultra-high performance concrete layer outer surface is not less than 10mm, and
Less than wall thickness 40%.
The permanent template of this post ultra-high performance concrete, template in steel during described molding, permanent template steel reinforcement cage, core is mixed
Solidifying soil reserved steel bar cage is collectively as the main steel bar stress of the permanent template of post ultra-high performance concrete.
The permanent template of this post ultra-high performance concrete, during described molding, in steel, the surfaces externally and internally of template all has drawknot steel
Muscle, is used for improving permanent template and core concrete cohesive force.
Another object of the present invention is to introduce the preparation method of the permanent template of above-mentioned post ultra-high performance concrete, press
Following step is carried out:
1) according to the size of post, arrangement of reinforcement and protective layer requirement, make template in permanent template steel reinforcement cage, steel, core concrete pre-
Stay steel reinforcement cage；
2) steel tie is welded in the surfaces externally and internally of template in steel, and permanent template steel reinforcement cage 2 and core concrete are reserved steel
Muscle cage is welded on steel tie with one heart；
3) above-mentioned steel reinforcement cage is placed in external mold, assembles permanent template mould；
4) prepare ultra-high performance concrete, the ultra-high performance concrete mixed is pumped into or pours in mould；
5) after ultra-high performance concrete post permanent template reaches strength of mould stripping, external mold is removed；
6) need to carry out maintenance according to ultra-high performance concrete maintenance, obtain post ultra-high performance concrete permanent template.
Compared to existing technology, the invention has the beneficial effects as follows:
One, in the steel of the present invention, the steel reinforcement cage in template is a part for permanent template, is not required at the scene during cast-in-place concrete again
Assembling reinforcement cage, less working procedure, accelerate speed of application, convenient and simple.
Two, the permanent template of the post ultra-high performance concrete of the present invention, is increased by concrete layer inside and outside steel tie drawknot
Strong cohesive force between permanent template and cast-in-place concrete and the bearing capacity of post, increase structural integrity further, improve
The mechanical property that component is overall.
Three, the present invention saves making permanent template and tears template step in steel open, it is to avoid the form removal that concrete shrinkage is brought is stranded
Difficult problem.
Four, the present invention uses ultra-high performance concrete as works protective layer, excellent durability.
Five, the present invention has ultra-high performance concrete as protective layer in steel outside mould, and fire resistance is good.
Accompanying drawing explanation
Fig. 1 is the permanent template cross sectional representation of the post ultra-high performance concrete of the present invention
Shown in figure it is: the outside ultra-high performance concrete layer of 1-；2-permanent template steel reinforcement cage；Template in 3-steel；4-steel tie；
5-core concrete reserves arrangement of reinforcement.
Detailed description of the invention
Below by way of the detailed description of the invention of the specific instantiation explanation present invention, those skilled in the art can be by this theory
Content disclosed in bright book understands advantages of the present invention and effect easily.The present invention other different mode can also give reality
Execute, i.e. do not depart from disclosed under the scope of, different modifications and change can be given.
Embodiment:
As it is shown in figure 1, the permanent template of a kind of post ultra-high performance concrete, including outside ultra-high performance concrete layer 1 and by outward
The tubular permanent template steel reinforcement cage 2 that is arranged concentrically successively to interior, in the steel of molding template 3, core concrete reserved steel bar
Cage 5, is evenly arranged with connection permanent template steel reinforcement cage 1 mutual vertically in template 3 in described steel and core concrete reserves steel
The steel tie 4 of muscle cage 5, fills outside very-high performance in space between template 3 in above-mentioned permanent template steel reinforcement cage 2, steel
Concrete layer 1, described permanent template steel reinforcement cage 2 is wrapped in outside ultra-high performance concrete layer 1.
Described steel tie 4 uses the deformed bar of a diameter of 6 ~ 20mm, and along permanent template length direction every 1 meter minimum
Arrange two.
Described permanent template steel reinforcement cage 2, core concrete reserved steel bar cage 5 all use with template in steel 3 weld formation whole
Body.
In described steel between template 3 and steel tie 4, permanent template steel reinforcement cage 2 and core concrete reserved steel bar cage 5 and
Between steel tie, welding is all used to be connected with each other.
In described steel, template 3 cross section is not for round, and it is concavo-convex to there is the fluctuating within 5mm.
Ultra-high performance concrete layer has superhigh intensity and superelevation durability, and comprcssive strength is more than 130MPa, and charge value is not
More than 40C.
Ultra-high performance concrete layer thickness is not less than 35mm.
Steel reinforcement cage includes some stirrups, is uniformly arranged and connects the longitudinal reinforcement of each stirrup along permanent template length direction.
The permanent template stirrup distance away from ultra-high performance concrete layer outer surface is not less than 10mm, and less than wall thickness
40%。
The permanent template of this post ultra-high performance concrete, template in steel during described molding, permanent template steel reinforcement cage, core is mixed
Solidifying soil reserved steel bar cage is collectively as the main steel bar stress of the permanent template of post ultra-high performance concrete.
The permanent template of this post ultra-high performance concrete, during described molding, in steel, the surfaces externally and internally of template all has drawknot steel
Muscle, is used for improving permanent template and core concrete cohesive force.
The present embodiment uses slump 813mm, the ultra-high performance concrete of cubic compressive strength 162MPa.Institute's molding
Superelevation concrete column permanent template is cylinder, external diameter 600mm, length 1500mm, the permanent template 3 of post ultra-high performance concrete
Wall thickness 50mm.Permanent template steel reinforcement cage 2 arrangement of reinforcement: 8 diameter 25HRB400, the ratio of reinforcement 1.14%, core concrete reserved steel bar
Cage 5 arrangement of reinforcement: 8 diameter 36HRB400, the ratio of reinforcement 1.04%.
Making step includes:
1) according to the size of permanent template, arrangement of reinforcement and protective layer requirement, make template 3, core in permanent template steel reinforcement cage 2, steel
Concrete reserved steel bar cage 5；
2) steel tie 4 is welded in the surfaces externally and internally of template 3 in steel, and permanent template steel reinforcement cage 2 and core concrete are reserved
Steel reinforcement cage 5 is welded on steel tie 4 with one heart；
3) above-mentioned steel reinforcement cage is placed in external mold, assembles permanent template mould；
4) prepare ultra-high performance concrete, the ultra-high performance concrete mixed is pumped into or pours in mould；
5) after ultra-high performance concrete post permanent template reaches strength of mould stripping, external mold is removed；
6) band mould steam curing 24 hours in 40 DEG C；
7) after form removal, steam curing 48 hours in 85 DEG C；Obtain the permanent template of post ultra-high performance concrete.
For obtaining superelevation concrete column permanent template, cylinder uses slump flow test 344mm, cube strength
The high-strength concrete of 58.4MPa, cast-in-place enter post ultra-high performance concrete permanent template in molding；Room temperature watering maintenance 28 days.
According to the method for testing of " Standard for test methods of concrete structures " (GB/T 50152-2012), embodiment superelevation
The cracking load of energy permanent template cylinder is 74.4MPa, and the pumping molding ultra-high performance concrete comparing the ratio of reinforcement identical is permanent
Template cylinder improves 19.2%, and ultimate load is 96.4MPa, improves 12.4%.Permanent template and core concrete cooperation
All right, stress performance is excellent.
In sum, permanent template of post ultra-high performance concrete of the present invention and preparation method thereof, by retaining in steel
Template, saves and tears interior mould step in prefabricated permanent template open, by steel tie, enhance between permanent template and cast-in-place concrete
Cohesive force, preparation is convenient, and in steel reinforcing bar template within as the main principal rod of cast-in-place concrete, minimizing site operation
Operation, remarkable in economical benefits, the demand of large-scale industrial production can be met.
Description above and embodiment are merely illustrative principle and effect thereof of the present invention, not to the present invention
Limit.Any creation fallen within the scope of the appended claims comes under the scope that the present invention is protected.
Claims (10)
1. the permanent template of a post ultra-high performance concrete, it is characterised in that: include outside ultra-high performance concrete layer (1) and
Tubular permanent template steel reinforcement cage (2) that is arranged concentrically the most successively, in the steel of molding template (3), core concrete
Reserved steel bar cage (5), is evenly arranged with connection permanent template steel reinforcement cage (1) and core mutual vertically in template (3) in described steel
The steel tie (4) of heart concrete reserved steel bar cage (5), in above-mentioned permanent template steel reinforcement cage (2), steel between template (3)
Filling outside ultra-high performance concrete layer (1) in space, described permanent template steel reinforcement cage (2) is wrapped in outside very-high performance and mixes
In solidifying soil layer (1).
The permanent template of post ultra-high performance concrete the most according to claim 1, it is characterised in that: described steel tie
(4) deformed bar of a diameter of 6 ~ 20mm is used, and along the every 1 meter of minimum layout of permanent template length direction two.
The permanent template of post ultra-high performance concrete the most according to claim 1, it is characterised in that: described permanent mould slab
Muscle cage (2), core concrete reserved steel bar cage (5) all use with template in steel (3) and weld formation entirety.
The permanent template of post ultra-high performance concrete the most according to claim 1, it is characterised in that: template in described steel
(3) and between steel tie (4), permanent template steel reinforcement cage (2) and core concrete reserved steel bar cage (5) and steel tie it
Between, all use welding to be connected with each other.
The permanent template of post ultra-high performance concrete the most according to claim 1, it is characterised in that: in steel, template (3) is horizontal
Cross section is circular, and it is concavo-convex to there is the fluctuating within 5mm.
Post ultra-high performance concrete permanent template the most according to claim 1, it is characterised in that: described ultra-high performance concrete
Layer has superhigh intensity and superelevation durability, and comprcssive strength is less than 40C more than 130MPa, charge value.
Post ultra-high performance concrete permanent template the most according to claim 1, it is characterised in that: described ultra-high performance concrete
Layer thickness is not less than 35mm.
Post ultra-high performance concrete permanent template the most according to claim 1, it is characterised in that: described steel reinforcement cage includes
Some stirrups, it is uniformly arranged and connects the longitudinal reinforcement of each stirrup along permanent template length direction.
Post ultra-high performance concrete permanent template the most according to claim 1, it is characterised in that: described permanent template stirrup away from
The distance of ultra-high performance concrete layer outer surface is not less than 10mm, and less than the 40% of wall thickness.
10. a preparation method for the permanent template of post ultra-high performance concrete as claimed in any one of claims 1-9 wherein,
Its making step is:
1) according to the size of post, arrangement of reinforcement and protective layer requirement, in making permanent template steel reinforcement cage (2), steel, template (3), core are mixed
Solidifying soil reserved steel bar cage (5)；
2) steel tie (4) is welded in the surfaces externally and internally of template (3) in steel, and by permanent template steel reinforcement cage (2) and core coagulation
Soil reserved steel bar cage (5) is welded on steel tie (4) with one heart；
3) above-mentioned steel reinforcement cage is placed in external mold, assembles permanent template mould；
4) prepare ultra-high performance concrete, the ultra-high performance concrete mixed is pumped into or pours in mould；
5) after ultra-high performance concrete post permanent template reaches strength of mould stripping, external mold is removed；
6) need to carry out maintenance according to ultra-high performance concrete maintenance, obtain post ultra-high performance concrete permanent template.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610612752.2A CN106193454A (en) | 2016-07-29 | 2016-07-29 | A kind of permanent template of post ultra-high performance concrete and preparation method thereof |
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| CN201610612752.2A CN106193454A (en) | 2016-07-29 | 2016-07-29 | A kind of permanent template of post ultra-high performance concrete and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869016A (en) * | 2017-02-21 | 2017-06-20 | 南昌大学 | A kind of FRP pipes prefabricated with half half cast-in-place regeneration concrete prestressing force overlapping bridge pier and preparation method |
| CN106869015A (en) * | 2017-02-21 | 2017-06-20 | 南昌大学 | A kind of FRP pipes cast-in-place with half half prefabricated regeneration concrete prestressing force overlapping bridge pier and preparation method |
| CN106968244A (en) * | 2017-02-21 | 2017-07-21 | 南昌大学 | A kind of FRP pipes and half prefabricated half cast-in-place regeneration concrete prestressing force overlapping pile foundation and preparation method |
| CN109811768A (en) * | 2019-01-22 | 2019-05-28 | 广东水电二局股份有限公司 | A kind of reinforced concrete structure of anti-seawater corrosion, constructing structure and construction method |
| CN110409813A (en) * | 2019-08-16 | 2019-11-05 | 辰泰(广德)智能装配建筑股份有限公司 | Exempt to split into type beam forms, formwork structure and construction process containing steel reinforcement cage |
| CN113482239A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨理工大学 | High-performance concrete permanent formwork square steel pipe combination beam and manufacturing method thereof |
| CN113482240A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨理工大学 | Concrete column adopting prefabricated angle steel lattice permanent formwork and manufacturing method thereof |
| CN113530086A (en) * | 2021-07-31 | 2021-10-22 | 张明鑫 | Column steel bar keel and supporting system thereof |
| CN113818334A (en) * | 2021-09-22 | 2021-12-21 | 湖南大学 | Prefabricated UHPC formwork core-filling concrete pier with framework and construction method thereof |
| CN115772996A (en) * | 2022-12-12 | 2023-03-10 | 盐城工学院 | Construction method of formwork prefabricated assembly type RC frame structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106869016A (en) * | 2017-02-21 | 2017-06-20 | 南昌大学 | A kind of FRP pipes prefabricated with half half cast-in-place regeneration concrete prestressing force overlapping bridge pier and preparation method |
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| CN106968244A (en) * | 2017-02-21 | 2017-07-21 | 南昌大学 | A kind of FRP pipes and half prefabricated half cast-in-place regeneration concrete prestressing force overlapping pile foundation and preparation method |
| CN109811768A (en) * | 2019-01-22 | 2019-05-28 | 广东水电二局股份有限公司 | A kind of reinforced concrete structure of anti-seawater corrosion, constructing structure and construction method |
| CN110409813A (en) * | 2019-08-16 | 2019-11-05 | 辰泰(广德)智能装配建筑股份有限公司 | Exempt to split into type beam forms, formwork structure and construction process containing steel reinforcement cage |
| CN113482239A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨理工大学 | High-performance concrete permanent formwork square steel pipe combination beam and manufacturing method thereof |
| CN113482240A (en) * | 2021-07-02 | 2021-10-08 | 哈尔滨理工大学 | Concrete column adopting prefabricated angle steel lattice permanent formwork and manufacturing method thereof |
| CN113530086A (en) * | 2021-07-31 | 2021-10-22 | 张明鑫 | Column steel bar keel and supporting system thereof |
| CN113818334A (en) * | 2021-09-22 | 2021-12-21 | 湖南大学 | Prefabricated UHPC formwork core-filling concrete pier with framework and construction method thereof |
| CN115772996A (en) * | 2022-12-12 | 2023-03-10 | 盐城工学院 | Construction method of formwork prefabricated assembly type RC frame structure |
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Application publication date: 20161207 |
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