CN111561080A - Preparation method of heat-insulating wall for high-rise building - Google Patents
Preparation method of heat-insulating wall for high-rise building Download PDFInfo
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- CN111561080A CN111561080A CN202010547353.9A CN202010547353A CN111561080A CN 111561080 A CN111561080 A CN 111561080A CN 202010547353 A CN202010547353 A CN 202010547353A CN 111561080 A CN111561080 A CN 111561080A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000004567 concrete Substances 0.000 claims abstract description 63
- 238000003756 stirring Methods 0.000 claims abstract description 55
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 53
- 239000004568 cement Substances 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000011259 mixed solution Substances 0.000 claims abstract description 19
- 239000004744 fabric Substances 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 239000004088 foaming agent Substances 0.000 claims abstract description 12
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 12
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 12
- 238000005485 electric heating Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims description 13
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 20
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000006260 foam Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 8
- 238000004873 anchoring Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011381 foam concrete Substances 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 230000009878 intermolecular interaction Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
- B28C5/006—Methods for mixing involving mechanical aspects
-
- 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
- E04B1/66—Sealings
-
- 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
- E04B1/82—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 sound only
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D13/00—Electric heating systems
- F24D13/02—Electric heating systems solely using resistance heating, e.g. underfloor heating
- F24D13/022—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements
- F24D13/024—Electric heating systems solely using resistance heating, e.g. underfloor heating resistances incorporated in construction elements in walls, floors, ceilings
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a preparation method of a heat-insulating wall body for a high-rise building, which comprises the following steps: the concrete wall body, the inside and/or outside of the concrete wall body has thermal insulation walls, the steel reinforcement of the concrete wall body adopts the above arrangement of two-limb stirrup; sound-proof fiber cloth is bonded between the concrete wall and the heat-insulating wall; a plurality of groups of vertical reinforcing ribs which are arranged at equal intervals are arranged on the inner side of the heat-insulating wall body, and at least part of the vertical reinforcing ribs can be used as electric heating electrodes to be connected with a power supply; and the vertical reinforcing ribs are bound and connected with the stirrups extending out of the concrete wall. The slurry for preparing the heat-insulating wall adopts the following steps: cement and water are put into a stirrer to be stirred for the first time, a protein foaming agent is added to be stirred for the second time after stirring to prepare cement paste mixed liquid mixed with the protein foaming agent, the cement paste mixed liquid is injected into a cavity of a template at the position of the heat-insulating wall, the cement paste mixed liquid is stirred for the third time after the cavity of the template is filled with the mixed liquid, and a power supply connected with the vertical reinforcing ribs is synchronously switched on during stirring; after the intermittence, the mixed solution is stirred for four times again, and the elasticity of bubbles in the slurry needs to be detected in the stirring process.
Description
Technical Field
The invention relates to the technical field of high-rise building walls, in particular to a preparation method of a heat-insulating wall for a high-rise building.
Background
For the outer wall of a high-rise building, a masonry structure or a shear wall structure is generally adopted, but the strength cannot meet the requirement by adopting the masonry structure, and the heat insulation performance cannot meet the requirement by adopting the shear wall structure. Therefore, it is an urgent need to solve the problem of providing a wall body which can meet the strength requirement and can also keep warm.
Disclosure of Invention
Therefore, the invention aims to provide a preparation method of a heat insulation wall for a high-rise building, which overcomes the defect that the outer wall of the high-rise building adopts a masonry structure or a shear wall structure in the prior art.
The invention provides a preparation method of a heat-insulating wall body for a high-rise building, which comprises the following steps:
the concrete wall body is provided with the heat preservation wall body at the inner side and/or the outer side, the steel bars of the concrete wall body are arranged above two stirrups, and the distance between the stirrups is 45-55 mm; sound-proof fiber cloth is bonded between the concrete wall and the heat-insulating wall; a plurality of groups of vertical reinforcing ribs which are arranged at equal intervals are arranged on the inner side of the heat-insulating wall body, and at least part of the vertical reinforcing ribs can be used as electric heating electrodes to be connected with a power supply; and the vertical reinforcing ribs are bound and connected with the stirrups extending out of the concrete wall.
Wherein the thickness of the sound-proof fiber cloth is 5mm-7 mm.
According to the technical scheme, compared with the prior art, the invention discloses the heat-insulating wall body for the high-rise building, the concrete wall body is used as a main bearing structure, the heat-insulating wall body is arranged on the inner side and/or the outer side of the concrete wall body, the heat-insulating wall body and the heat-insulating wall body are directly provided with the sound-insulating fiber cloth, and the vertical reinforcing ribs of the heat-insulating wall body are bound and connected with the outward-extending stirrups of the concrete wall body, so that the strength of the outer wall of the high-rise building is improved, and the.
In addition, the vertical reinforcing ribs are heated in an electric heating mode, so that the temperature of the heat-preservation cement paste is increased, and the surface tension is reduced. Tests show that the surface tension of the liquid decreases with increasing temperature, the saturated vapor pressure of the liquid increases with increasing temperature, the molecular density in the gas phase increases, and the attraction of the gas phase molecules to the liquid surface molecules increases. In addition, after the temperature is increased, the volume of the liquid phase expands, the liquid phase molecular distance increases, and the intermolecular interaction force decreases. Both effects reduce the surface tension of the liquid. After the surface tension of the liquid is reduced, bubbles are easier to form and are more difficult to break, so that the foam stability is relatively good, and the heat insulation property of the heat insulation wall body is further improved.
Further, the thickness of the concrete wall is 80mm-120 mm; the thickness of the heat-insulating wall body is 80mm-140 mm.
Further, the diameter of the stirrup is 8mm or more.
Furthermore, the vertical reinforcing ribs are arranged at intervals of 300-400 mm and have diameters of 20-25 mm.
Furthermore, two vertical reinforcing ribs are arranged in each group, and the distance between each vertical reinforcing rib and the outer surface of the heat-insulating wall body is 18-20 mm; one vertical reinforcing rib 4 is selected as an electrode every 950mm-1050 mm. The distance between the vertical reinforcing rib and the outer surface of the heat preservation wall body refers to the distance between the center of the section of the vertical reinforcing rib and the outer surface of the heat preservation wall body.
Furthermore, the steel bar anchoring length of the heat-insulating wall body is 48 times of the diameter of the steel bar; the stirrup extending into the heat-insulating wall body is welded into a closed hoop, and the welding length is 10 times of the diameter of the stirrup steel bar. The technical measures can effectively improve the torsion resistance of the structure. In order to avoid the problem that the combined structure can not bear force together under the action of earthquake force or horizontal wind force, the anchoring length of the steel bars of the heat-insulating wall body is increased by 20 percent compared with the traditional anchoring length.
Furthermore, the hooping extending out of the concrete wall body is welded with the water-proof sheet. The stirrup extending outwards from the concrete wall body can possibly become a water seepage channel for outdoor rainwater to enter the room, the water-proof sheet is welded on the stirrup to avoid the problems, and the water-proof sheet is a thin iron sheet with the diameter of 50mm and the thickness of 6 mm.
The invention also aims to provide a construction method of the high-rise building thermal insulation wall, which comprises the following steps:
s1, binding concrete steel bars, erecting a concrete template, and pouring concrete; removing the concrete wall formwork to form a concrete wall;
s2, pasting sound insulation fiber cloth on the surface of the concrete wall; the sound insulation fiber cloth is provided with a preformed hole at the position of the concrete wall body overhanging stirrup, so that the concrete wall body overhanging stirrup can conveniently penetrate through;
s3, binding the vertical reinforcing ribs of the heat-insulating wall body, and binding the vertical reinforcing ribs of the heat-insulating wall body with the stirrups extending outwards from the concrete wall body; part of the vertical reinforcing ribs are used as electrodes for electric heating, and insulating sleeves are wrapped outside the vertical reinforcing ribs;
s4, erecting a template of the heat-insulating wall, and arranging sponge strips at the gaps of the template in order to prevent the gaps of the template from leaking slurry;
s5, connecting the vertical reinforcing ribs serving as the electrodes with a power supply;
s6, preparing slurry of the heat-insulating wall: putting cement and water into a stirrer for primary stirring, wherein the weight ratio of the cement to the water is 0.45-05, adding a protein foaming agent for secondary stirring after stirring to prepare a cement paste mixed solution mixed with the protein foaming agent, injecting the cement paste mixed solution into a cavity of a template at the position of a heat-insulating wall, filling the cavity of the template with the mixed solution, stirring the cement paste mixed solution for three times, synchronously switching on a power supply connected with a vertical reinforcing rib during stirring, and then heating for 10min and then switching off the power supply; stirring the mixed solution for four times after the intermittence is carried out for 5min, and detecting the elasticity of bubbles in the slurry in the stirring process;
and S7, removing the template of the heat-insulating wall after the slurry is solidified.
According to the technical scheme, compared with the prior art, the construction method of the high-rise building heat-insulating wall body is disclosed and provided, and the heat-insulating wall obtained through the construction method not only increases the strength of the high-rise building outer wall body, but also meets the heat-insulating requirement.
The heating time of the vertical reinforcing ribs is 10min, the foam stability is increased along with the increase of the time, and when the heating time of the vertical reinforcing ribs is larger than 10min, the foam stability is not changed greatly, so that the heating time of the vertical reinforcing ribs is 10 min.
Further, in S3, a water-proof sheet is welded to the concrete wall overhanging stirrup.
Further, in the step S6, the rotation speed of the stirrer is 80rad/min during primary stirring, the stirring is carried out for 5-6min, then the protein foaming agent is added, secondary stirring is carried out, the secondary stirring speed is 60rad/min, the stirring is carried out for 3-4min to prepare a cement paste mixed solution mixed with the protein foaming agent, the cement paste mixed solution is injected into the cavity of the template at the position of the heat preservation wall, the cement paste mixed solution is stirred for three times after the template cavity is filled with the mixed solution, the third stirring speed is 50rad/min, the stirring is stopped after 10min, the stirring is carried out for four times after 5min of intermittence, the stirring speed is 100rad/min, and the stirring time; during the stirring process, the elasticity of the bubbles needs to be detected, the bubbles are lightly pressed by a kitchen steel spoon and pressed to deform, if the bubbles are lightly pressed to be broken, the elasticity of the bubbles is poor, if the bubbles are repeatedly and lightly pressed to be not broken, the original shape is immediately recovered when the bubbles are not pressed, and the elasticity of the bubbles is qualified. The pressure should be applied with attention, and the pressure should be applied gently but not strongly. The change in the bubbles should be carefully observed during pressurization.
Intermittent stirring can increase foam stability and reduce bleeding. The foam with good stability, the liquid film is not easy to break in the slurry, and communicating holes formed by communicating gas after cracking are not easy to form. Thus, it ultimately forms the desired closed cell, less stable foam, fewer closed cells and more interconnected cells. Because the air is not circulated, the heat can not be lost by taking the air as a carrier, so that the heat conductivity is very low, and the heat insulation performance is excellent. The communicating holes can allow air to penetrate through, form air flow and take away heat, and reduce heat preservation and heat insulation. When the foam is added into cement slurry, the cement slurry becomes very thin, the foam is few, the size of the slurry is small, and the density of the prepared foam concrete is high, which does not meet the technical requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a thermal insulation wall for a high-rise building provided by the invention;
FIG. 2 is a schematic structural diagram of a concrete wall three-leg stirrup of the embodiment of FIG. 1;
FIG. 3 is a schematic structural view of another embodiment of the thermal insulation wall for high-rise buildings according to the present invention;
FIG. 4 is a schematic structural diagram of a concrete wall two-limb stirrup of the embodiment shown in FIG. 3;
in the figure: 1-concrete wall, 2-heat preservation wall, 3-sound insulation fiber cloth and 4-vertical reinforcing ribs.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
Referring to fig. 1-2, an embodiment of an insulated wall for a high-rise building according to the present invention includes:
the concrete wall body 1 is provided with the heat preservation wall bodies 2 on the inner side and the outer side of the concrete wall body 1, the steel bars of the concrete wall body 1 are arranged by adopting three-limb stirrups, and the distance between the stirrups is 45-55 mm; a sound insulation fiber cloth 3 is bonded between the concrete wall 1 and the heat insulation wall 2; a plurality of groups of vertical reinforcing ribs 4 which are arranged at equal intervals are arranged on the inner side of the heat-insulating wall body 2, and at least part of the vertical reinforcing ribs 4 can be used as electric heating electrodes to be connected with a power supply; the vertical reinforcing ribs 4 are bound and connected with the stirrups extending out of the concrete wall 1. Wherein the thickness of the sound-proof fiber cloth is 5mm-7 mm.
The invention discloses a heat-insulating wall for high-rise buildings, which adopts a concrete wall as a main bearing structure, wherein the inner side and/or the outer side of the concrete wall are/is provided with the heat-insulating wall, the concrete wall and the heat-insulating wall are/is directly provided with sound-insulating fiber cloth, and vertical reinforcing ribs of the heat-insulating wall are bound and connected with stirrups extending out of the concrete wall, so that the strength of the outer wall of the high-rise building is improved, and the heat-insulating requirement is met.
In addition, the vertical reinforcing ribs are heated in an electric heating mode, so that the temperature of the heat-preservation cement paste is increased, and the surface tension is reduced. Tests show that the surface tension of the liquid decreases with increasing temperature, the saturated vapor pressure of the liquid increases with increasing temperature, the molecular density in the gas phase increases, and the attraction of the gas phase molecules to the liquid surface molecules increases. In addition, after the temperature is increased, the volume of the liquid phase expands, the liquid phase molecular distance increases, and the intermolecular interaction force decreases. Both effects reduce the surface tension of the liquid. After the surface tension of the liquid is reduced, bubbles are easier to form and are more difficult to break, so that the foam stability is relatively good, and the heat insulation property of the heat insulation wall body is further improved.
Wherein the thickness of the concrete wall 1 is 80mm-100 mm; the thickness of the heat-insulating wall body 2 is 80mm-100 mm. The diameter of the stirrup is more than 8 mm. The vertical reinforcing ribs 4 are arranged at intervals of 300-400 mm and have diameters of 20-25 mm. Two vertical reinforcing ribs 4 are arranged in each group, and the distance between each vertical reinforcing rib 4 and the outer surface of the heat-insulating wall 2 is 18-20 mm; one vertical reinforcing rib 4 is selected as an electrode every 950mm-1050 mm. The steel bar anchoring length of the heat insulation wall body 2 is 48 times of the steel bar diameter; the stirrup extending into the heat-insulating wall body 2 is welded into a closed hoop, and the welding length is 10 times of the diameter of the stirrup steel bar. The technical measures can effectively improve the torsion resistance of the structure. In order to avoid the problem that the combined structure can not bear force together under the action of earthquake force or horizontal wind force, the anchoring length of the steel bars of the heat-insulating wall body is increased by 20 percent compared with the traditional anchoring length.
Advantageously, the concrete wall 1 has the water-proof sheet welded on the outward extending stirrup. The stirrup extending outwards from the concrete wall body can possibly become a water seepage channel for outdoor rainwater to enter the room, the water-proof sheet is welded on the stirrup to avoid the problems, and the water-proof sheet is a thin iron sheet with the diameter of 50mm and the thickness of 6 mm.
Example 2
Referring to fig. 3-4, an embodiment of the present invention provides an insulated wall for a high-rise building, including:
the concrete wall body 1, the heat preservation wall body 2 is arranged on the inner side of the concrete wall body 1, the steel bars of the concrete wall body 1 are arranged by adopting two-limb stirrups, and the distance between the stirrups is 45-55 mm; a sound insulation fiber cloth 3 is bonded between the concrete wall 1 and the heat insulation wall 2; a plurality of groups of vertical reinforcing ribs 4 which are arranged at equal intervals are arranged on the inner side of the heat-insulating wall body 2, and at least part of the vertical reinforcing ribs 4 can be used as electric heating electrodes to be connected with a power supply; the vertical reinforcing ribs 4 are bound and connected with the stirrups extending out of the concrete wall 1.
Wherein the thickness of the concrete wall 1 is 100mm-120 mm; the thickness of the heat-insulating wall body 2 is 120mm-140 mm. The diameter of the stirrup is more than 8 mm. The vertical reinforcing ribs 4 are arranged at intervals of 300-400 mm and have diameters of 20-25 mm. Two vertical reinforcing ribs 4 are arranged in each group, and the distance between each vertical reinforcing rib 4 and the outer surface of the heat-insulating wall 2 is 18-20 mm; one vertical reinforcing rib 4 is selected as an electrode every 950mm-1050 mm. The steel bar anchoring length of the heat insulation wall body 2 is 48 times of the steel bar diameter; the stirrup extending into the heat-insulating wall body 2 is welded into a closed hoop, and the welding length is 10 times of the diameter of the stirrup steel bar.
Advantageously, the concrete wall 1 has the water-proof sheet welded on the outward extending stirrup.
Example 3
The invention provides a construction method of a high-rise building heat-insulating wall, which comprises the following steps:
s1, binding concrete steel bars, erecting a concrete template, and pouring concrete; removing the concrete wall formwork to form a concrete wall;
s2, pasting sound insulation fiber cloth on the surface of the concrete wall; the sound insulation fiber cloth is provided with a preformed hole at the position of the concrete wall body overhanging stirrup, so that the concrete wall body overhanging stirrup can conveniently penetrate through;
s3, binding the vertical reinforcing ribs of the heat-insulating wall body, and binding the vertical reinforcing ribs of the heat-insulating wall body with the stirrups extending outwards from the concrete wall body; part of the vertical reinforcing ribs are used as electrodes for electric heating, and insulating sleeves are wrapped outside the vertical reinforcing ribs;
s4, erecting a template of the heat-insulating wall, and arranging sponge strips at the gaps of the template in order to prevent the gaps of the template from leaking slurry;
s5, connecting the vertical reinforcing ribs serving as the electrodes with a power supply;
s6, preparing slurry of the heat-insulating wall: putting cement and water into a stirrer for primary stirring, wherein the weight ratio of the cement to the water is 0.45-05, adding a protein foaming agent for secondary stirring after stirring to prepare a cement paste mixed solution mixed with the protein foaming agent, injecting the cement paste mixed solution into a cavity of a template at the position of a heat-insulating wall, filling the cavity of the template with the mixed solution, stirring the cement paste mixed solution for three times, synchronously switching on a power supply connected with a vertical reinforcing rib during stirring, and then heating for 10min and then switching off the power supply; stirring the mixed solution for four times after the intermittence is carried out for 5min, and detecting the elasticity of bubbles in the slurry in the stirring process;
and S7, removing the template of the heat-insulating wall after the slurry is solidified.
The invention discloses a construction method of a high-rise building heat-insulating wall body, and the heat-insulating wall obtained by the construction method not only increases the strength of the high-rise building outer wall body, but also meets the heat-insulating requirement.
The heating time of the vertical reinforcing ribs is 10min, the foam stability is increased along with the increase of the time, and when the heating time of the vertical reinforcing ribs is larger than 10min, the foam stability is not changed greatly, so that the heating time of the vertical reinforcing ribs is 10 min.
Advantageously, in S3, the concrete wall overhanging stirrup is welded with the water-proof sheet.
Wherein, in the S6, the rotation speed of the stirrer is 80rad/min during primary stirring, the stirring is carried out for 5-6min, then the protein foaming agent is added, secondary stirring is carried out, the secondary stirring speed is 60rad/min, the stirring is carried out for 3-4min to prepare cement paste mixed liquid mixed with the protein foaming agent, the cement paste mixed liquid is injected into the cavity of the template at the position of the heat preservation wall, the cement paste mixed liquid is stirred for three times after the template cavity is filled with the mixed liquid, the third stirring speed is 50rad/min, the stirring is stopped after 10min, the stirring is carried out for four times after 5min of intermittence, the stirring speed is 100rad/min, and the stirring time; during the stirring process, the elasticity of the bubbles needs to be detected, the bubbles are lightly pressed by a kitchen steel spoon and pressed to deform, if the bubbles are lightly pressed to be broken, the elasticity of the bubbles is poor, if the bubbles are repeatedly and lightly pressed to be not broken, the original shape is immediately recovered when the bubbles are not pressed, and the elasticity of the bubbles is qualified. The pressure should be applied with attention, and the pressure should be applied gently but not strongly. The change in the bubbles should be carefully observed during pressurization.
Intermittent stirring can increase foam stability and reduce bleeding. The foam with good stability, the liquid film is not easy to break in the slurry, and communicating holes formed by communicating gas after cracking are not easy to form. Thus, it ultimately forms the desired closed cell, less stable foam, fewer closed cells and more interconnected cells. Because the air is not circulated, the heat can not be lost by taking the air as a carrier, so that the heat conductivity is very low, and the heat insulation performance is excellent. The communicating holes can allow air to penetrate through, form air flow and take away heat, and reduce heat preservation and heat insulation. When the foam is added into cement slurry, the cement slurry becomes very thin, the foam is few, the size of the slurry is small, and the density of the prepared foam concrete is high, which does not meet the technical requirements.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (1)
1. A preparation method of a heat-insulating wall body for a high-rise building is characterized by comprising the following steps: the concrete wall comprises a concrete wall body (1), wherein a heat insulation wall body (2) is arranged on the inner side and/or the outer side of the concrete wall body (1), reinforcing steel bars of the concrete wall body (1) are arranged above two stirrups, and the distance between the stirrups is 45-55 mm; a sound insulation fiber cloth (3) is bonded between the concrete wall (1) and the heat insulation wall (2); a plurality of groups of vertical reinforcing ribs (4) which are arranged at equal intervals are arranged on the inner side of the heat-insulating wall body (2), and at least part of the vertical reinforcing ribs (4) can be used as electric heating electrodes to be connected with a power supply; the vertical reinforcing ribs (4) are bound and connected with stirrups extending outwards from the concrete wall (1);
the slurry for preparing the heat-insulating wall adopts the following steps: placing cement and water into a stirrer for primary stirring, wherein the weight ratio of the cement to the water is 0.45-05, the rotating speed of the stirrer during primary stirring is 80rad/min, adding a protein foaming agent after stirring for 5-6min, and then carrying out secondary stirring, wherein the secondary stirring speed is 60rad/min, and stirring for 3-4min to prepare a cement slurry mixed solution mixed with the protein foaming agent; injecting a cement slurry mixed solution into a cavity of a template at the position of the heat-preservation wall, fully injecting the mixed solution into the cavity of the template, stirring the cement slurry mixed solution for three times at a stirring speed of 50rad/min, stopping stirring after 10min of stirring, and stirring for four times after 5min of intermittence, wherein the stirring speed is 100rad/min, and the stirring time is 15 min; during the stirring process, the elasticity of the bubbles needs to be detected, the bubbles are lightly pressed by a kitchen steel spoon and pressed to deform, if the bubbles are lightly pressed to be broken, the elasticity of the bubbles is poor, if the bubbles are repeatedly and lightly pressed to be not broken, the original shape is immediately recovered when the bubbles are not pressed, and the elasticity of the bubbles is qualified.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010547353.9A CN111561080A (en) | 2020-04-13 | 2020-04-13 | Preparation method of heat-insulating wall for high-rise building |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284708.XA CN111456288A (en) | 2020-04-13 | 2020-04-13 | Heat-insulating wall for high-rise building |
| CN202010547353.9A CN111561080A (en) | 2020-04-13 | 2020-04-13 | Preparation method of heat-insulating wall for high-rise building |
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| CN202010547353.9A Withdrawn CN111561080A (en) | 2020-04-13 | 2020-04-13 | Preparation method of heat-insulating wall for high-rise building |
| CN202010284708.XA Withdrawn CN111456288A (en) | 2020-04-13 | 2020-04-13 | Heat-insulating wall for high-rise building |
| CN202010547286.0A Withdrawn CN111648501A (en) | 2020-04-13 | 2020-04-13 | Construction method of high-rise building heat-insulating wall |
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| CN202010547286.0A Withdrawn CN111648501A (en) | 2020-04-13 | 2020-04-13 | Construction method of high-rise building heat-insulating wall |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102251662B (en) * | 2011-02-28 | 2012-12-05 | 唐山北极熊建材有限公司 | Cast-in-place process for ultra light foamed cement-based bearing heat insulation wallboard |
| KR101316104B1 (en) * | 2011-10-07 | 2013-10-11 | 권대용 | Precast concrete panel |
| CN203462381U (en) * | 2013-09-09 | 2014-03-05 | 长沙学院 | Conductive concrete layer road |
| CN103883133B (en) * | 2014-04-15 | 2016-03-02 | 北京卧龙农林科技有限公司 | The insulation reforming technology of loam brick body of wall |
| CN110194622A (en) * | 2019-05-13 | 2019-09-03 | 浙江大东吴集团建设有限公司 | A kind of foamed concrete production technology |
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| CN111648501A (en) | 2020-09-11 |
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Application publication date: 20200821 |