CN112299789A - Steel fiber common template frame and preparation method thereof - Google Patents

Steel fiber common template frame and preparation method thereof Download PDF

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Publication number
CN112299789A
CN112299789A CN202011233623.5A CN202011233623A CN112299789A CN 112299789 A CN112299789 A CN 112299789A CN 202011233623 A CN202011233623 A CN 202011233623A CN 112299789 A CN112299789 A CN 112299789A
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CN
China
Prior art keywords
template
parts
steel fiber
steel
cement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011233623.5A
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Chinese (zh)
Inventor
史乐贤
周大兴
方宏伟
钱增志
董磊
张红伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Construction Group Co Ltd
China Railway Construction Corp Ltd CRCC
Original Assignee
China Railway Construction Group Co Ltd
China Railway Construction Corp Ltd CRCC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Railway Construction Group Co Ltd, China Railway Construction Corp Ltd CRCC filed Critical China Railway Construction Group Co Ltd
Priority to CN202011233623.5A priority Critical patent/CN112299789A/en
Publication of CN112299789A publication Critical patent/CN112299789A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84Walls made by casting, pouring, or tamping in situ
    • E04B2/86Walls made by casting, pouring, or tamping in situ made in permanent forms

Abstract

The invention discloses a steel fiber common template frame and a preparation method thereof, wherein the steel fiber common template frame comprises a template, a reinforcing steel bar and a split connecting piece, and template materials comprise cement, natural sand, steel fiber, silica fume, fly ash, polycarboxylic acid water reducing agent powder, a defoaming agent, rubber powder and an early strength agent. The invention has the beneficial effects that: template thickness is 20mm, has higher intensity, can make to drawing the connecting piece interval to set up to 40cm, can to a great extent reduce the quantity of connecting piece, reduces to drawing the connecting piece cost, sets up the resistance to compression, the rupture strength of the improvement template material that steel fibre can great degree, also can avoid template material brittle failure simultaneously. The produced template material has high fluidity, can automatically level, does not need to be vibrated during template forming, uses common Portland cement, has lower cost, meets the requirements of building industrialization in the aspects of saving field labor, saving turnover materials and the like, and can greatly improve the production efficiency of components.

Description

Steel fiber common template frame and preparation method thereof
Technical Field
The invention relates to a support-free permanent template, in particular to a steel fiber common template frame and a preparation method thereof, belonging to the technical field of building materials.
Background
Permanent form panels are prefabricated panels that are used as form panels during construction and are one of the components of the structure itself after concrete is poured. At present, both domestic and foreign places commonly used are special-shaped (wave-shaped, dense-rib-shaped and the like) metal sheets (also called profiled steel sheets), prestressed concrete sheets, glass fiber cement templates, trabecular fillers, steel truss type concrete plates and the like.
The support-free permanent formwork is applied to high-rise buildings in China, is slightly supported after being laid, and then is paved with reinforcing steel bars and poured with concrete to form a floor slab, so that the construction is simple and convenient.
For the template materials in the current market, the thickness of the template material is thicker, the occupied building area is large, the distance between the two opposite-pulling connecting pieces is smaller, the connecting pieces are more, the cost is high, and the template contains glass fiber gridding cloth or steel wire meshes, so that the template removing time is longer.
Disclosure of Invention
The present invention is directed to provide a steel fiber general-type formwork frame and a method for manufacturing the same.
The invention realizes the purpose through the following technical scheme: a steel fiber common type formwork frame comprises a formwork; the formworks are arranged on two sides of the steel bar respectively, the height between the two formworks is the height of a wall body, and the formworks are connected through counter-pulling connecting pieces.
The template is made of cement, natural sand, steel fiber, silica fume, fly ash, polycarboxylic acid water reducing agent powder, defoaming agent, rubber powder and early strength agent; the concrete is characterized in that the concrete is prepared from 400-500 parts of cement, 400-500 parts of natural sand, 30-40 parts of steel fibers, 20-30 parts of silica fume, 10-15 parts of fly ash, 3-5 parts of polycarboxylate water reducer powder, 0.2-0.3 part of defoaming agent, 4-5 parts of rubber powder, 1-2 parts of early strength agent and 0.13-0.14 part of material water-material ratio of the template 1.
Preferably: the concrete is characterized in that the concrete is prepared from 450 parts of cement, 450 parts of natural sand, 35 parts of steel fibers, 25 parts of silica fume, 13 parts of fly ash, 4 parts of polycarboxylate superplasticizer powder, 0.25 part of defoaming agent, 4.5 parts of rubber powder, 1.5 parts of early strength agent and 0.13 part of material-water-material ratio of the template.
Preferably: the concrete is characterized in that the concrete is 400 parts, the natural sand is 400 parts, the steel fiber is 30 parts, the silica fume is 20 parts, the fly ash is 10 parts, the polycarboxylate water reducing agent powder is 3 parts, the defoaming agent is 0.2 part, the rubber powder is 4 parts, the early strength agent is 1 part, and the material water-material ratio of the template is 0.13.
Preferably: the concrete is characterized in that the concrete is prepared from 500 parts of cement, 500 parts of natural sand, 40 parts of steel fibers, 30 parts of silica fume, 15 parts of fly ash, 5 parts of polycarboxylate superplasticizer powder, 0.3 part of defoaming agent, 5 parts of rubber powder, 2 parts of early strength agent and 0.14 part of material water-material ratio of the template.
The material proportion of the template is determined based on the research on the application of cement, natural sand, steel fiber, silica fume, fly ash, polycarboxylic acid water reducing agent powder, defoaming agent, rubber powder and early strength agent to the template framework.
The preparation method comprises the preparation in a dry mixing mode or the preparation by mixing on site;
the preparation method of the dry mixing type comprises the following steps:
step one, weighing raw materials with corresponding weights according to a mixing ratio;
step two, fully mixing the weighed raw materials and storing the mixture in a dry place;
and step three, adding water according to the water-material ratio when in use, slowly stirring according to preset time, and then quickly stirring, thus obtaining the product which can be molded.
Wherein the slow stirring speed is 55-60r/min, and the fast stirring speed is 110-120 r/min.
The field mixing preparation comprises the following steps:
step one, weighing raw materials with corresponding weights according to a mixing ratio;
and step two, fully mixing the raw materials according to the mixing proportion, adding water according to the water-material ratio, stirring, slowly stirring according to preset time, quickly stirring, and then molding.
Wherein the slow stirring speed is 55-60r/min, and the fast stirring speed is 110-120 r/min.
As a still further scheme of the invention: the thickness of the template is 20 mm.
As a still further scheme of the invention: the counter-pull connecting pieces are distributed at 40cm intervals in the transverse and vertical directions.
As a still further scheme of the invention: the cement 425 grade Portland cement contained in the form.
As a still further scheme of the invention: the early strength agent contained in the template is used for shortening the hardening time of the material.
As a still further scheme of the invention: the steel fiber contained in the template is used for improving the compression strength and the bending strength of the template material.
The invention has the beneficial effects that: connect through drawing the connecting piece between the template, ensure the fixed of template position, in addition, highly be the wall body height between the template, can ensure to live the wall body parcel completely, and then be convenient for pour the concrete, template thickness is 20mm, higher intensity has, can make to drawing the connecting piece interval to set up to 40cm, can to a great extent reduce the quantity of connecting piece, reduce to drawing the connecting piece cost, set up the resistance to compression that the improvement template material that steel fibre can the great degree, the bending strength, also can avoid template material brittle failure simultaneously. The produced template material has high fluidity, can automatically level, does not need to be vibrated during template forming, uses common Portland cement, has lower cost, meets the requirements of building industrialization in the aspects of saving field labor, saving turnover materials and the like, and can greatly improve the production efficiency of components.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1. template, 2, reinforcing bar and 3, counter-pull connecting piece.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a general form frame of steel fiber includes a form 1; the formwork 1 is respectively arranged on two sides of a steel bar 2, the height between the two formworks 1 is the height of a wall body, the formworks 1 are connected through a counter-pull connecting piece 3, and the material of the formwork 1 comprises cement, natural sand, steel fiber, silica fume, fly ash, polycarboxylic acid water reducing agent powder, a defoaming agent, rubber powder and an early strength agent; the concrete is prepared from 450 parts of cement, 450 parts of natural sand, 35 parts of steel fibers, 25 parts of silica fume, 13 parts of fly ash, 4 parts of polycarboxylate superplasticizer powder, 0.25 part of defoaming agent, 4.5 parts of rubber powder, 1.5 parts of early strength agent and 0.13 part of material-water-material ratio of the template 1;
the preparation method comprises the preparation in a dry mixing mode or the preparation by mixing on site;
the preparation method of the dry mixing type comprises the following steps:
step one, weighing raw materials with corresponding weights according to a mixing ratio;
step two, fully mixing the weighed raw materials, and storing the mixture in a dry place for not more than 3 months;
and step three, when the water-material mixing machine is used, water is added according to the water-material ratio, the mixture is slowly stirred for 1 minute and quickly stirred for 1 minute, and then the mixture is quickly stirred for 1 minute, so that the mixture can be molded.
Wherein the slow stirring speed is 55-60r/min, preferably 58 r/min; the rapid stirring speed is 110-120r/min, preferably 115 r/min.
The field mixing preparation comprises the following steps:
step one, weighing raw materials with corresponding weights according to a mixing ratio;
and step two, fully mixing the raw materials according to the mixing proportion, adding water according to the water-material ratio, stirring for 1 minute slowly during stirring, stirring for 1 minute quickly, then stirring for 1 minute quickly, and then molding.
Wherein the slow stirring speed is 55-60r/min, preferably 58 r/min; the rapid stirring speed is 110-120r/min, preferably 115 r/min.
In the embodiment of the present invention, the thickness of the form 1 is 20mm, and the form has higher strength.
In the embodiment of the invention, the counter-pull connecting pieces 3 are distributed at intervals of 40cm in the horizontal and vertical directions, so that the number of the counter-pull connecting pieces 3 is reduced, and the cost of the counter-pull connecting pieces 3 is reduced.
In the embodiment of the present invention, the 425 grade portland cement contained in the formwork 1 has an absolute price advantage compared with the sulphoaluminate cement when the 425 grade portland cement is used for the formwork material.
In the embodiment of the invention, the early strength agent contained in the template 1 is used for shortening the hardening time of materials, the setting time of ordinary portland cement is longer, the hydration speed is slow, the strength of the template 1d is about 10MPa under the proportioning condition of the invention, and the early strength agent is required to be added for shortening the template stripping time and improving the efficiency. After adding proper early strength agent, the 1d compressive strength can reach more than 20 MPa.
In the embodiment of the invention, the steel fiber contained in the template 1 is used for improving the compression strength and the bending strength of the template material, and the steel fiber is doped with the cement-based material because the elastic modulus of the steel fiber is far greater than that of the cement-based material, so that the compression strength and the bending strength of the template material can be improved to a greater extent, and meanwhile, the brittle failure of the template material can be avoided.
In the embodiment of the invention, the silica fume is used for improving the later strength of the sulphoaluminate cement, the silica fume can fill the pores among cement particles, and simultaneously generates gel with hydration products, and reacts with the cement to generate the gel in an alkaline environment, so that the folding resistance, the compression resistance and the permeability resistance of the template material are improved.
In the embodiment of the invention, the defoaming agent is used for reducing the bubbles of the material, gas is introduced when the template material is stirred during production, and simultaneously the water reducing agent can increase the surface tension of water to generate bubbles, so that more bubbles can enable the internal gaps of the template material to pass, the compactness of the template material is reduced, the final strength is reduced, and the defoaming agent can reduce the bubbles of the material, increase the compactness of the template material and further improve the strength.
In the embodiment of the invention, the glue powder has the functions of thickening, water retention and cracking resistance, the separation and layering of cement and sand in the template material are easily caused by the lower specific volume of the glue, and the cracking and strength reduction of the template are caused by the fact that the template material is easy to lose water due to the large contact surface with air.
In the embodiment of the invention, the natural sand comprises quartz sand, carborundum and the like, the cement-based material with more than 100MPa is generally prepared from the quartz sand or the carborundum with higher hardness, and the river sand is also the first choice of the template material due to the characteristics of wide sources, low price and the like.
In the embodiment of the invention, the fly ash belongs to industrial waste, can play a role of micro aggregate and ball in a cement-based material, fills a material system, improves the fluidity, and can replace part of cement, thereby reducing the cost.
In the embodiment of the invention, the compression strength of the water reducing agent in the cement-based material is enhanced along with the reduction of the water-cement ratio of the cement-based material in a certain range, so that the water reducing agent is an essential component in the modern high-strength cement-based material.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. A steel fiber common type template frame is characterized in that: comprises a template (1); the formworks (1) are respectively arranged on two sides of the steel bar (2), the height between the two formworks (1) is the height of a wall body, and the formworks (1) are connected through a counter-pull connecting piece (3);
the template (1) is made of cement, natural sand, steel fiber, silica fume, fly ash, polycarboxylic acid water reducing agent powder, a defoaming agent, rubber powder and an early strength agent;
the concrete is characterized in that the concrete is prepared from 400-500 parts of cement, 400-500 parts of natural sand, 30-40 parts of steel fibers, 20-30 parts of silica fume, 10-15 parts of fly ash, 3-5 parts of polycarboxylic acid water reducer powder, 0.2-0.3 part of defoaming agent, 4-5 parts of rubber powder, 1-2 parts of early strength agent and 0.13-0.14 part of material water-material ratio of the template (1).
2. A steel fiber normal-type formwork frame as claimed in claim 1, wherein: the thickness of the template (1) is 20 mm.
3. A steel fibre formwork frame of the general type according to claim 1 or 2, characterized in that: the counter-pull connecting pieces (3) are distributed at intervals of 40cm in the horizontal and vertical directions.
4. A steel fibre normal form formwork frame as claimed in claim 2, wherein: the cement contained in the template (1) is 425-grade ordinary portland cement.
5. A steel fibre normal form formwork frame as claimed in claim 3, wherein: the early strength agent contained in the template (1) is used for shortening the hardening time of the material.
6. A steel fiber normal-type formwork frame as claimed in claim 1, wherein: the steel fiber contained in the template (1) is used for improving the compression strength and the bending strength of the template material.
7. A method for manufacturing a steel fiber general-type formwork frame according to claim 1, wherein the formwork frame is manufactured by dry mixing or in-situ mixing:
the preparation method of the dry mixing type comprises the following steps:
step one, weighing raw materials with corresponding weights according to a mixing ratio;
step two, fully mixing the weighed raw materials and storing the mixture in a dry place;
adding water according to the water-material ratio when in use, slowly stirring according to preset time, and then quickly stirring, and then molding;
wherein the slow stirring speed is 55-60r/min, and the fast stirring speed is 110-120 r/min;
the field mixing preparation comprises the following steps:
step one, weighing raw materials with corresponding weights according to a mixing ratio;
step two, fully mixing the raw materials according to a mixing ratio, adding water according to a water-material ratio, slowly stirring according to preset time, and then quickly stirring, thus obtaining the product by molding;
wherein the slow stirring speed is 55-60r/min, and the fast stirring speed is 110-120 r/min.
CN202011233623.5A 2020-11-06 2020-11-06 Steel fiber common template frame and preparation method thereof Pending CN112299789A (en)

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Application Number Priority Date Filing Date Title
CN202011233623.5A CN112299789A (en) 2020-11-06 2020-11-06 Steel fiber common template frame and preparation method thereof

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Application Number Priority Date Filing Date Title
CN202011233623.5A CN112299789A (en) 2020-11-06 2020-11-06 Steel fiber common template frame and preparation method thereof

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100807761B1 (en) * 2007-04-27 2008-02-28 주식회사 콘크리닉 Cement composition using alpha type calcined gypsum and constructing method thereof
CN102844503A (en) * 2009-06-01 2012-12-26 巴斯夫欧洲公司 Wall form units and systems
CN103266760A (en) * 2013-05-14 2013-08-28 浙江大学 Permanent beam template made of fiber woven mesh reinforced cement based composite material and method for manufacturing permanent beam template
US20140033638A1 (en) * 2010-12-02 2014-02-06 Cemex Research Group Ag Reinforced wall system and method
CN107140921A (en) * 2017-06-29 2017-09-08 上海罗洋新材料科技有限公司 A kind of high ductility cement-base composite material of super hardening and preparation method thereof
CN111734018A (en) * 2020-06-09 2020-10-02 安徽海龙建筑工业有限公司 Formwork structure, disassembly-free mold and concrete wall construction method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100807761B1 (en) * 2007-04-27 2008-02-28 주식회사 콘크리닉 Cement composition using alpha type calcined gypsum and constructing method thereof
CN102844503A (en) * 2009-06-01 2012-12-26 巴斯夫欧洲公司 Wall form units and systems
US20140033638A1 (en) * 2010-12-02 2014-02-06 Cemex Research Group Ag Reinforced wall system and method
CN103266760A (en) * 2013-05-14 2013-08-28 浙江大学 Permanent beam template made of fiber woven mesh reinforced cement based composite material and method for manufacturing permanent beam template
CN107140921A (en) * 2017-06-29 2017-09-08 上海罗洋新材料科技有限公司 A kind of high ductility cement-base composite material of super hardening and preparation method thereof
CN111734018A (en) * 2020-06-09 2020-10-02 安徽海龙建筑工业有限公司 Formwork structure, disassembly-free mold and concrete wall construction method

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