CN110130553B - Heat-insulating floor structure and production method - Google Patents

Heat-insulating floor structure and production method Download PDF

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Publication number
CN110130553B
CN110130553B CN201910427463.9A CN201910427463A CN110130553B CN 110130553 B CN110130553 B CN 110130553B CN 201910427463 A CN201910427463 A CN 201910427463A CN 110130553 B CN110130553 B CN 110130553B
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weight
parts
steel
longitudinal
steel frame
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CN110130553A (en
Inventor
郑祥才
孙国策
张艳东
张学宇
杜有利
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Shandong Lianxing Luxia Architectural Technology Co ltd
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Shandong Lianxing Luxia Architectural Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/02—Feeding the unshaped material to moulds or apparatus for producing shaped articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B13/00—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material
    • B32B13/04—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B13/06—Layered products comprising a a layer of water-setting substance, e.g. concrete, plaster, asbestos cement, or like builders' material comprising such water setting substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/02—Layer formed of wires, e.g. mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E04B1/80—Heat insulating elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/14—Load-carrying floor structures formed substantially of prefabricated units with beams or girders laid in two directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses a heat-insulating floor structure and a production method thereof. The floor slab comprises steel frame structures and heat insulation layers filled between the steel frame structures. Wherein the thickness of the heat-insulating layer is 140-180mm, and the raw materials comprise 20-200 parts by weight of lightweight aggregate, 500 parts by weight of cement in 250-sand, 500 parts by weight of sand in 200-sand, 600 parts by weight of ceramsite in 250-sand, 20-300 parts by weight of fly ash, 1-50 parts by weight of additive and 400 parts by weight of water in 100-sand; the steel frame structure comprises a transfer angle formed by a cross beam, a longitudinal beam and connecting steel. The floor slab has heat insulation performance and higher structural rigidity, and can be used for assembling buildings without building load-bearing frames.

Description

Heat-insulating floor structure and production method
Technical Field
The invention relates to a building wallboard structure, in particular to a heat-insulation floor slab structure and a production method thereof.
Background
With the development of modern industrial technology, house construction technology is also promoted, and due to the fact that construction speed is high, production cost is low, fabricated buildings are rapidly popularized all over the world.
Various prefabricated element structures have been disclosed in the prior art. For example, CN107119839A discloses an assembled floor slab and a manufacturing method thereof, wherein the beam to be overlapped on the floor slab is a flower-basket type beam provided with horizontal steps on one side or two sides in the length direction, and the beam is divided into an upper beam and a lower beam by taking the horizontal steps as a boundary; the floor slab is a prefabricated slab with a light heat insulation slab core, reinforcing steel bars are arranged in the floor slab along the length direction of the floor slab, and two ends of the reinforcing steel bars extend out of the floor slab to serve as connecting ribs; the two ends of the floor slab are arranged on the horizontal steps of the beam, the connecting ribs of the floor slab opposite to the two sides of the middle beam are welded and are integrally poured with the upper beam, and the connecting rib of the floor slab on one side of the boundary beam is connected with the stress rib in the upper beam of the boundary beam and is integrally poured with the upper beam.
For another example, CN 205688656U discloses a prefabricated floor member, comprising: the upper surface layer, the base body and the lower surface layer are bonded and solidified together; the steel bar reinforced concrete composite floor is characterized in that an upper layer steel bar mesh, a steel framework and a lower layer steel bar mesh are wrapped in the base body, the upper layer steel bar mesh and the lower layer steel bar mesh are respectively fixed on the upper side and the lower side of the steel framework, and the base body contains a light base layer formed by foamed cement, foamed concrete or aerated concrete. The upper surface layer and the lower surface layer of the member can be finished with the base body in one step when being prefabricated in a factory, the workload of site construction can be greatly reduced, the dead weight is lighter, the surface layer is smoother, the heat preservation, the heat insulation and the sound insulation performance of the floor are better, and the construction cost can be greatly reduced.
However, the structural strength between the existing fabricated floor slabs and wall slabs is inferior to that of cast-in-place columns, beams, floors and roof slabs, and cannot meet the requirement of large-scale building assembly, and the existing floor slabs usually do not have heat insulation performance.
Disclosure of Invention
In order to solve at least part of technical problems in the prior art, the invention provides a novel heat-insulation floor slab structure which has heat-insulation performance, higher structural rigidity and lateral stiffness and better structural firmness. Specifically, the present invention includes the following.
In a first aspect of the present invention, a thermal insulation floor slab structure is provided, which includes a steel frame structure and a thermal insulation layer filled between the steel frame structure, wherein: the thickness of the heat-insulating layer is 140-180mm, and the raw materials comprise 20-200 parts by weight of lightweight aggregate, 500 parts by weight of cement in 250-sand, 500 parts by weight of sand in 200-sand, 600 parts by weight of ceramsite in 250-sand, 20-300 parts by weight of fly ash, 1-50 parts by weight of additive and 400 parts by weight of water in 100-sand; the steel frame structure comprises a transfer angle formed by a cross beam, a longitudinal beam and connecting steel.
Preferably, in the transfer angle, the cross beam and the longitudinal beam are welded to the same side of the connecting steel at an included angle of 45 degrees, so that the cross beam and the longitudinal beam are vertically arranged and the cross beam, the longitudinal beam and the connecting steel are in the same plane, one end of the connecting steel protrudes out of the cross beam, the plane of the end of the connecting steel is parallel to the cross beam, and the other end of the connecting steel protrudes out of the longitudinal beam, and the plane of the end of the connecting steel is parallel to the longitudinal beam.
Preferably, the cross beam comprises a first cross beam and a second cross beam, the longitudinal beam comprises a first longitudinal beam and a second longitudinal beam, and the connecting steel comprises a first connecting steel, a second connecting steel, a third connecting steel and a fourth connecting steel; the one end of first crossbeam, the one end of first longeron and first connecting steel constitutes first switching angle, the other end of first crossbeam, the one end of second longeron and second connecting steel constitutes the second switching angle, the one end of second crossbeam, the other end of second longeron and third connecting steel constitutes the third switching angle, the other end of second crossbeam, the other end of first longeron and fourth connecting steel constitute the fourth switching angle.
Preferably, the thermal insulation floor structure further comprises a longitudinal purlin connected between the first cross beam and the second cross beam, and the longitudinal purlin has a first cantilever protruding from the first cross beam and a second cantilever protruding from the second cross beam.
Preferably, the thermal insulation floor structure further comprises a transverse purlin connected between the first longitudinal beam and the second longitudinal beam, and the transverse purlin is provided with a first cantilever protruding out of the first longitudinal beam and a second cantilever protruding out of the second longitudinal beam.
Preferably, the cross beam, the longitudinal purline and the transverse purline are respectively made of C-shaped steel, the C-shaped steel groove of the first cross beam is opposite to the C-shaped steel groove of the second cross beam, and the C-shaped steel groove of the first longitudinal beam is opposite to the C-shaped steel groove of the second longitudinal beam.
Preferably, the heat preservation and insulation floor structure further comprises a first steel wire mesh and a second steel wire mesh welded to two sides of the steel frame structure.
Preferably, the lightweight aggregate is at least one selected from the group consisting of vitrified micro bubbles, vermiculite, expanded perlite and modified expanded perlite, and has a density of 50-150kg/m3(ii) a And the additive is prepared from substances including 10-30 parts by weight of foaming agent, 5-100 parts by weight of lime, 5-100 parts by weight of gypsum, 5-50 parts by weight of polyurethane and 3-9 parts by weight of sodium hexametaphosphate.
Preferably, a cement mortar protective layer with the thickness of 15-25mm is arranged on one side of the steel frame structure, a fine sand concrete layer with the thickness of 25-35mm is arranged on the other side of the steel frame structure, and a finishing material layer with the thickness of 40-55mm is further arranged on the fine sand concrete side.
In a second aspect of the present invention, there is provided a method for producing a heat insulating floor slab structure, comprising the steps of:
(1) paying off on a mould table of the production line, and erecting a side mould according to the size of the floor;
(2) reversely paving the facing material on the bottom die by using a reverse hitting process, spraying polymer mortar with the thickness of 3-5mm on the bottom surface of the facing material, and then pouring C30 fine-stone concrete;
(3) adding a welding steel wire mesh above a steel frame structure welded into a whole, adding the welding steel wire mesh on the bottom surface of the steel frame structure, hoisting the steel frame structure into a template, and pouring a mixture obtained by 20-200 parts by weight of lightweight aggregate, 500 parts by weight of cement in 250-containing cement, 500 parts by weight of sand in 200-containing cement, 600 parts by weight of ceramsite in 250-containing cement, 20-300 parts by weight of fly ash, 1-50 parts by weight of additive and 400 parts by weight of water in the template to obtain a heat-insulating layer;
(4) applying cement mortar on the surface of the heat-insulating layer, pressing the cement mortar into the grid cloth, removing the side die, and performing steam curing to obtain the heat-insulating floor slab structure.
The heat-insulating floor slab disclosed by the invention uses the light heat-insulating material with excellent strength, so that a heat-insulating layer with the thickness of more than 140mm can be obtained by using a large amount of heat-insulating materials, the heat-insulating property of the floor slab is greatly improved, and the strength of the floor slab cannot be influenced by the use of the light material. In addition, preferably, the framework of the invention is provided with a special transition angle, the connection between the upper part and the lower part of the wall body with the upright post (or the rigid steel) can be conveniently realized through the transition angle, and the assembly of a large building can be further realized under the condition that the bearing framework is not required to be prefabricated. In addition, the protruding ends of the connecting steel in the adapter angles further reinforce the cross beam, the longitudinal beam and the adjacent wall body.
The heat-insulating floor slab structure can be used for forming a new assembly system, and can be integrated with a bearing stressed frame and an outer wall enclosure part to form an assembly type steel frame support structure system integrating heat-insulating floor slabs and slabs.
Drawings
FIG. 1 is a cross-sectional view of an exemplary insulated floor structure.
FIG. 2 is a diagram of a first exemplary steel frame construction of an insulated floor structure.
FIG. 3 is a diagram of a second exemplary steel frame construction of an insulated floor structure.
Description of reference numerals:
the steel frame structure comprises a fine sand concrete layer 2, a first steel wire mesh 3, a steel frame structure 1, a second steel wire mesh 4, a cement mortar protective layer 5, a heat insulation layer 12, C30 fine stone concrete 11, a transition angle 100, a cross beam 110, a longitudinal beam 120, connecting steel 130, a first cross beam 111, a second cross beam 112, a first longitudinal beam 121, a second longitudinal beam 122, first connecting steel 131, second connecting steel 132, third connecting steel 133, fourth connecting steel 134, a second transition angle 200, a third transition angle 300, a fourth transition angle 400, a longitudinal purlin 140, a first cantilever 141, a second cantilever 142 and a transverse purlin 150.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that the upper and lower limits of the range, and each intervening value therebetween, is specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control. Unless otherwise indicated, "%" is percent by weight.
The term "heat-insulating floor structure" of the present invention refers to a prefabricated member for assembling a large building, which is a modular structure that can be used and transported separately, unlike a building and a partial structure thereof. Preferably, one floor slab of the present invention constitutes a horizontal surface.
The term "fixedly connected" in the present invention includes a fixed connection in a detachable manner or a fixed connection in a non-detachable manner. The fixed connection in a detachable manner includes a bolt connection and the like. The non-detachable fixed connection includes welding and the like.
[ Heat preservation and insulation floor Structure ]
In a first aspect of the present invention, a thermal insulation floor slab structure is provided, which includes steel frame structures and thermal insulation layers filled between the steel frame structures. The respective configurations are described in detail below.
Steel frame structure
The steel frame structure is a framework arranged in a horizontal floor slab, and is different from a common steel frame structure of the floor slab. The steel frame structure of the invention can comprise one transfer angle, two transfer angles, three transfer angles, four transfer angles and even more than four transfer angles.
Switching angle
The transfer angle of the invention has the following structure: the crossbeam and the longeron weld in same one side of connecting the steel with 45 degrees contained angles respectively to make crossbeam and longeron vertical setting and crossbeam, longeron and connecting steel three be in the coplanar. One end of the connecting steel protrudes from the cross beam at an angle of 45 degrees to form a first flange as one end of the connecting steel, and the plane of the end of the flange is parallel to the cross beam.
In certain embodiments, the length of the first flange perpendicular to the thickness of the beam is the same as or at least more than half the thickness of the corresponding wall. Similarly, the other end of the connecting steel protrudes from the side member at an angle of 45 degrees to form a second flange as the other end of the connecting steel, the end plane of which is parallel to the side member. Preferably, the length of the second flange perpendicular to the thickness of the stringer is the same as or at least more than half the thickness of the corresponding wall. Preferably, the first flange has the same length as the second flange.
In certain embodiments, the welding location of the cross beam to the connecting steel is different from the welding location of the side beam to the same connecting steel. That is, the cross beams and the longitudinal beams which are perpendicular to each other are not connected at the corner joints, but welded integrally through the connecting steel. The design is more favorable for firm connection between the cross beam and the longitudinal beam on one hand, and on the other hand, enough necessary space is reserved for the upright columns at the vertical edges of the wall body, so that firm connection between the upper wall body and the lower wall body through the upright columns is more favorable.
In certain embodiments, the steel frame structure of the present invention is quadrilateral, comprising four transition angles. Specifically, the cross member includes a first cross member and a second cross member. The stringers include a first stringer and a second stringer. The connection steels include a first connection steel, a second connection steel, a third connection steel, and a fourth connection steel. One end of the first cross beam, one end of the first longitudinal beam and the first connecting steel form a first connecting angle. Similarly, the other end of the first cross beam, one end of the second longitudinal beam and the second connecting steel form a second transfer angle. And one end of the second cross beam, the other end of the second longitudinal beam and the third connecting steel form a third transfer angle. And the other end of the second cross beam, the other end of the first longitudinal beam and the fourth connecting steel form a fourth transfer angle.
In the present invention, the lengths of the cross beams and the longitudinal beams are not particularly limited, and can be freely set according to the specification of the floor slab. The length of the cross beam can be greater than the length of the longitudinal beam, or the length of the cross beam can be less than the length of the longitudinal beam. It is also possible that the length of the cross beams is equal to the length of the longitudinal beams, so that the steel frame structure can be formed substantially square. In the present invention, the cross member is preferably C-shaped steel. More preferably, the invention comprises a first beam and a second beam, wherein the first beam and the second beam are respectively made of C-shaped steel, and the first beam and the second beam are arranged in a manner that grooves of the C-shaped steel are opposite. In the present invention, the longitudinal beam is preferably C-shaped steel. More preferably, the invention comprises a first longitudinal beam and a second longitudinal beam, wherein the first longitudinal beam and the second longitudinal beam are respectively C-shaped steel, and the first longitudinal beam and the second longitudinal beam are arranged in a mode that grooves of the C-shaped steel are opposite. In the present invention, the connection steel is preferably C-shaped steel, and more preferably, the connection steel is disposed in such a manner that the groove of the C-shaped steel faces the inside of the steel frame structure. The length of the connection steel is not particularly limited, and may be, for example, 300-600 mm.
Purlin
In the invention, the steel frame structure optionally further comprises purlins, and the purlins can be horizontal purlins or longitudinal purlins. The number of purlins is not particularly limited.
In certain embodiments, the steel frame structure of the present invention further comprises a longitudinal purlin connected between the first cross beam and the second cross beam, the longitudinal purlin having a first cantilever projecting from the first cross beam and a second cantilever projecting from the second cross beam. Preferably, the longitudinal purlins are parallel to the stringers. The number of longitudinal purlins is not particularly limited. Generally 2 to 10, preferably 2 to 8, more preferably 2 to 6, etc. The longitudinal purlines are preferably C-shaped steel. The connection mode of the longitudinal purlines and the cross beams is not particularly limited, and the longitudinal purlines and the cross beams can be connected through welding or can be integrally formed.
In certain embodiments, the steel frame structure of the present invention further comprises a transverse purlin connected between the first stringer and the second stringer, and the transverse purlin has a first cantilever projecting from the first stringer and a second cantilever projecting from the second stringer. Preferably, the transverse purlins are parallel to the transverse beams. The number of transverse purlins is not particularly limited. Generally 1 to 10, preferably 1 to 4, e.g. 1, etc. The longitudinal purlines are preferably C-shaped steel. The connection mode of the longitudinal purlines and the cross beams is not particularly limited, and the longitudinal purlines and the cross beams can be connected through welding or can be integrally formed.
Steel wire mesh
The steel frame structure of the present invention optionally further comprises a steel mesh. Preferably, the steel wire mesh comprises a first steel wire mesh and a second steel wire mesh, and the first steel wire mesh is welded to the other side, opposite to the second steel wire mesh, of the steel frame structure. The steel wire mesh in the invention refers to a net structure formed by steel wires with smaller diameter. The diameter of the steel wire is typically 1-4mm, for example 3 mm.
Thermal insulation layer
The heat insulation layer of the invention is a heat insulation material layer filled between steel frame structures. Compared with the existing floor, the heat-insulating layer has larger thickness which can reach 140-180 mm. The raw materials of the heat-insulating layer comprise 20-200 parts by weight of lightweight aggregate, 500 parts by weight of cement in 250-200 parts by weight, 500 parts by weight of sand in 200-250-600 parts by weight of ceramsite, 20-300 parts by weight of fly ash, 1-50 parts by weight of additive and 400 parts by weight of water in 100-50 parts by weight. Compared with the existing heat preservation and insulation materials, the heat preservation and insulation material obtained from the raw materials has excellent heat preservation performance and higher strength.
The lightweight aggregate of the present invention means a lightweight aggregate having a density of 50 to 150kg/m3Preferably 80-100 kg/m3Examples include, but are not limited to, vitrified microbeads, vermiculite, expanded perlite, and modified expanded perlite. In the present invention, one of the above-mentioned substances may be used, or two or more of them may be used in combination. In the case of combined use, the mixing ratio of two or more substances is not particularly limited as long as the density thereof is controlled to be 50 to 150kg/m3The method can be implemented in the following steps. The lightweight aggregate of the invention can provide the material with the characteristics of light weight, high strength, heat preservation, fire resistance and the like. The lightweight aggregate is generally used in an amount of 20 to 200 parts by weight, preferably 50 to 150 parts by weight, more preferably 60 to 100 parts by weight.
The cement of the present invention may be any hydraulic inorganic cementing material, and is used for hardening in water to firmly cement sand, stone and other materials together. The invention preferably uses the hydraulic cementing material which is prepared by grinding Portland cement clinker, 20 to 40 percent of fly ash and a proper amount of gypsum, namely fly ash Portland cement. The cement is generally used in an amount of 250-500 parts by weight, preferably 300-450 parts by weight, and more preferably 350-400 parts by weight.
The sand grains of the present invention include medium sand and fine sand, which can be freely selected as needed, and a mixture of medium sand and fine sand can be used. Wherein the medium sand refers to sand and crushed debris with the particle size of 0.5mm-0.25 mm. The fine sand refers to sand with a fineness modulus of 2.2-1.6, and the particle diameter of more than 0.075mm exceeds 85% of the total weight. The amount of sand particles used in the present invention is generally 200-500 parts by weight, preferably 250-450 parts by weight, more preferably 300-400 parts by weight.
The ceramsite can further reduce the thermal conductivity and enhance the heat preservation and insulation performance. Preferably, the ceramsite of the present invention is a fly ash ceramsite, thereby providing greater strength and reduced weight while reducing thermal conductivity. The amount of the ceramsite is generally 250-600 parts by weight, preferably 300-500 parts by weight, more preferably 350-400 parts by weight.
The use of the fly ash in the invention can enhance the later strength of the material. Fly ash is generally used in an amount of 20 to 300 parts by weight, preferably 50 to 200 parts by weight, more preferably 60 to 100 parts by weight. If the amount is too large, the heat insulating effect is lowered. On the other hand, if the amount is too small, the later strength-enhancing effect of the resulting material becomes poor.
The additive is used for improving the adhesion, the swelling performance and the mineralization performance of the material. Preferably, the additives include foaming agents, lime, gypsum, polyurethane and sodium hexametaphosphate. Among them, the blowing agent is generally 10 to 30 parts by weight, preferably 12 to 25 parts by weight, more preferably 15 to 20 parts by weight. The blowing agent of the present invention is preferably a dialkyl dimethyl amine oxide and/or N-dodecyl ethanolamine. The use of such blowing agents can greatly reduce the thermal insulation properties, for example by reducing the thermal conductivity [ W/(m.K) ] by more than 18%, preferably more than 20%. Lime is generally 5 to 100 parts by weight, preferably 10 to 70 parts by weight, more preferably 20 to 50 parts by weight. The gypsum is generally 5 to 100 parts by weight, preferably 10 to 70 parts by weight, more preferably 20 to 50 parts by weight. The present invention uses polyurethane for improving foamability and further improving heat insulation performance. The polyurethane is generally 5 to 50 parts by weight, preferably 10 to 40 parts by weight, more preferably 20 to 40 parts by weight. The invention also uses sodium hexametaphosphate to promote the combination of molecules in the material and improve the strength of the material. The amount of sodium hexametaphosphate is generally 3 to 9 parts by weight, preferably 5 to 9 parts by weight.
Cement mortar protective layer
Optionally, the heat-insulating floor slab of the invention further comprises a cement mortar protective layer. Preferably, the cement mortar further comprises an alkali-resistant glass fiber mesh cloth attached inside. The thickness of the protective layer of cement mortar is generally 15 to 25mm, preferably 15 to 25 mm.
Fine sand concrete layer
Optionally, the heat preservation and insulation floor slab of the invention further comprises a fine sand concrete layer arranged on the side surface of the floor slab. The fine sand concrete layer is used for further embedding the steel frame structure, so that the steel frame structure is prevented from being exposed to the environment. The thickness of the fine sand concrete layer is generally 25 to 45mm, preferably 25 to 35 mm.
Facing material layer
Optionally, the heat insulation floor slab of the invention further comprises a facing material layer. The finishing material layer is directly used as a part of a prefabricated floor slab structure through prefabrication in a production workshop and the like, thereby reducing the construction amount in the building construction process and greatly improving the assembly level and the construction speed. The facing material layer includes a face brick layer, etc.
Production method ]
In a second aspect of the invention, there is provided a method of producing a thermally insulated floor structure, comprising at least the steps of:
(1) paying off on a mould table of the production line, and erecting a side mould according to the size of the floor;
(2) optionally, reversely paving the facing material on the bottom die by using a reverse beating process, and spraying polymer mortar with the thickness of 3-5mm on the bottom surface of the facing material;
(3) adding a welding steel wire mesh above a steel frame structure welded into a whole, adding the welding steel wire mesh on the bottom surface of the steel frame structure, hoisting the steel frame structure into a template, and pouring a mixture obtained by 20-200 parts by weight of lightweight aggregate, 500 parts by weight of cement in 250-containing cement, 500 parts by weight of sand in 200-containing cement, 600 parts by weight of ceramsite in 250-containing cement, 20-300 parts by weight of fly ash, 1-50 parts by weight of additive and 400 parts by weight of water in 100-containing cement in the template;
(4) applying cement mortar on the surface of the heat-insulating layer, pressing the cement mortar into the grid cloth, removing the side die, and performing steam curing to obtain the heat-insulating floor slab structure.
It is known to those skilled in the art that the production method of the present invention may include other steps in addition to the above steps. These other steps may be between the above steps (1) to (4), or may be before the above step (1) or after the step (4).
Example 1
FIG. 1 is a cross-sectional view of an exemplary insulated floor structure. As shown in fig. 1, the floor slab sequentially comprises a fine sand concrete layer 2, a first steel wire mesh 3, a steel frame structure 1, a second steel wire mesh 4 and a cement mortar protective layer 5 (an alkali-resistant glass fiber mesh cloth is pasted in the floor slab) in the thickness direction. Wherein the fine sand concrete layer 2 has a thickness of 30mm C30 and the diameter of the steel wire is 3@50 x 50. Of steel frame construction 1The thickness is 160 mm. The thickness of the cement mortar protective layer 5 is 20 mm. The lower layer inside the steel frame structure 1 is filled with 140mm of 500kg/m3A heat insulation layer 12. The insulating layer 12 is filled with C30 fine-stone concrete 11 with the thickness of 20 mm.
The heat preservation and insulation layer of the embodiment is prepared from the following raw materials:
100kg of vitrified micro bubbles, 300kg of cement, 200kg of sand grains, 500kg of fly ash ceramsite, 50kg of fly ash, 40kg of additive and 200kg of water;
wherein the additive is obtained by mixing the following substances: 20kg of dialkyl dimethyl amine oxide, 50kg of lime, 50kg of gypsum, 30kg of polyurethane and 5kg of sodium hexametaphosphate. The material thus obtained had a thermal conductivity [ W/(m.K) ] of 0.84 and a compressive strength of 460 kPa.
Fig. 2 is a diagram of an exemplary steel frame structure of a thermal insulation floor structure. As shown in fig. 2, in the present embodiment, the steel frame structure 1 has an adapter angle 100. The transition angle 100 is formed by a transverse beam 110, a longitudinal beam 120 and a connecting steel 130. The cross beam 110 and the longitudinal beam 120 are welded to the same side of the connection steel 130 at an included angle of 45 degrees, respectively, so that the cross beam 110 and the longitudinal beam 120 are vertically disposed. The cross beam 110, the longitudinal beam 120 and the connection steel 130 are in the same plane. One end of the connection steel 130 protrudes from the beam 110, and the end plane is parallel to the beam 110. The other end of the connecting steel 130 protrudes from the longitudinal beam 120, and the plane of the end is parallel to the longitudinal beam 120. The welding position of the cross beam 110 and the connecting steel 130 is kept at a certain distance from the welding position of the longitudinal beam 120 and the connecting steel 130. In fig. 1, one end of the connecting steel protrudes from the cross beam at an angle of 45 degrees, thereby forming a first flange. The other end of the connecting steel protrudes from the longitudinal beam at an included angle of 45 degrees, thereby forming a second flange.
FIG. 3 is a second exemplary steel frame construction of an insulated floor structure. As shown in fig. 3, the cross beam includes a first cross beam 111 and a second cross beam 112, the longitudinal beams include a first longitudinal beam 121 and a second longitudinal beam 122, and the connection steels include a first connection steel 131, a second connection steel 132, a third connection steel 133, and a fourth connection steel 134.
One end of the first cross member 111, one end of the first longitudinal member 121, and the first connecting steel 131 constitute a first corner 100. The other end of the first cross beam 111, one end of the second longitudinal beam 122, and the second connecting steel 132 form a second transfer angle 200. One end of the second cross beam 112, the other end of the second longitudinal beam 122, and the third connecting steel 133 form a third transfer angle 300. The other end of the second cross beam 112, the other end of the first longitudinal beam 121, and the fourth connecting steel 134 form a fourth transfer angle 400.
Also shown in fig. 3 is that the steel frame structure further comprises 4 longitudinal purlins 140, each longitudinal purlin 140 being connected in parallel between the first cross beam 111 and the second cross beam 112. The longitudinal purlin 140 has a first cantilever 141 protruding from the first beam 111 and a second cantilever 142 protruding from the second beam 112. The floors can be firmly fixed to the wall bodies on two sides through the first cantilevers 141 and the second cantilevers 142, and the two floors adjacent in the horizontal direction can be fixed through the connection between the first cantilevers 141 and the second cantilevers 142 of the other floors. In addition, fig. 3 also shows that the steel frame structure further comprises 1 transverse purlin 150 which is fixed between the first longitudinal beam 121 and the second longitudinal beam 122 in parallel.
Example 2
The procedure was repeated as in example 1 except that the materials for the thermal insulating layer were changed as follows.
100kg of vitrified micro bubbles, 350kg of cement, 300kg of sand grains, 550kg of fly ash ceramsite, 50kg of fly ash, 40kg of additive and 200kg of water. Wherein the additive comprises 15kg of dialkyl dimethyl amine oxide, 80kg of lime, 50kg of gypsum, 50kg of polyurethane and 8kg of sodium hexametaphosphate. The thermal conductivity [ W/(m.K) ] of the material thus obtained was 0.085, and the compressive strength was 456 Kpa.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The specification and examples are exemplary only.

Claims (4)

1. The utility model provides a thermal-insulated floor structure keeps warm, its characterized in that, be 160 mm's steel frame construction, the first wire net in both sides of steel frame construction and second wire net and pack in thickness is 140 mm's thermal-insulated layer between the steel frame construction, wherein:
the heat conductivity coefficient [ W/(m.K) ] of the heat-insulating layer material is 0.84, and the heat-insulating layer material comprises 100 parts by weight of lightweight aggregate, 300 parts by weight of cement, 200 parts by weight of sand, 500 parts by weight of ceramsite, 50 parts by weight of fly ash, 40 parts by weight of additive and 200 parts by weight of water;
the steel frame structure comprises a transfer angle formed by a cross beam, a longitudinal beam and connecting steel, wherein the cross beam and the longitudinal beam are welded on the same side of the connecting steel at an included angle of 45 degrees respectively, so that the cross beam and the longitudinal beam are vertically arranged and are positioned in the same plane, and the cross beam, the longitudinal beam and the connecting steel are not connected at the transfer angle but welded into a whole through the connecting steel;
one end of the connecting steel protrudes out of the beam to form a first flange, the plane of the end of the first flange is parallel to the beam, and the length of the first flange perpendicular to the thickness of the beam is the same as or at least half of the thickness of a corresponding wall;
the other end of the connecting steel protrudes out of the longitudinal beam to form a second flange, the plane of the end of the first flange is parallel to the longitudinal beam, and the length of the second flange perpendicular to the thickness of the longitudinal beam is the same as or at least half of the thickness of the corresponding wall.
2. A thermally insulated floor structure according to claim 1, wherein the cross beams comprise first and second cross beams, the longitudinal beams comprise first and second longitudinal beams, and a longitudinal purlin is provided between the first and second cross beams, the longitudinal purlin having a first cantilever projecting from the first cross beam and a second cantilever projecting from the second cross beam.
3. The insulated floor structure of claim 2, further comprising a transverse purlin connected between the first and second stringers, the transverse purlin having a first cantilever projecting from the first stringer and a second cantilever projecting from the second stringer.
4. A thermal insulating floor structure according to claim 1, wherein a protective layer of cement mortar is provided 15-25mm thick on one side of the steel frame structure, a layer of fine sand concrete is provided 25-35mm thick on the other side of the steel frame structure, and further a layer of facing material is provided 40-55mm thick on the fine sand concrete side.
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