CN115627890A - Folded surface type UHPC exterior wall cladding and manufacturing process thereof - Google Patents
Folded surface type UHPC exterior wall cladding and manufacturing process thereof Download PDFInfo
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- CN115627890A CN115627890A CN202211304642.1A CN202211304642A CN115627890A CN 115627890 A CN115627890 A CN 115627890A CN 202211304642 A CN202211304642 A CN 202211304642A CN 115627890 A CN115627890 A CN 115627890A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 188
- 238000005253 cladding Methods 0.000 title claims abstract description 129
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 40
- 239000004567 concrete Substances 0.000 claims abstract description 56
- 238000009413 insulation Methods 0.000 claims abstract description 37
- 238000004140 cleaning Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000005187 foaming Methods 0.000 claims abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 3
- 230000001070 adhesive effect Effects 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 239000004744 fabric Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 238000012423 maintenance Methods 0.000 claims description 11
- 230000001680 brushing effect Effects 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 229920001821 foam rubber Polymers 0.000 claims description 2
- 238000004321 preservation Methods 0.000 abstract description 4
- 238000001723 curing Methods 0.000 description 28
- 239000000463 material Substances 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 17
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- 238000003756 stirring Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 7
- 239000006004 Quartz sand Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
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- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
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- 238000005204 segregation Methods 0.000 description 2
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/072—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of specially adapted, structured or shaped covering or lining elements
-
- 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
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete 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
- B28B13/02—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
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Building Environments (AREA)
Abstract
The application relates to the technical field of assembly type buildings, and particularly discloses a folded UHPC exterior wall cladding and a manufacturing process thereof. The folded surface type UHPC outer wall hanging plate comprises UHPC concrete and a heat insulation plate; the heat insulation plate comprises a special-shaped heat insulation plate; the manufacturing process of the folded UHPC exterior wall cladding comprises the following steps: cleaning and installing a mould, preparing UHPC concrete, pouring by primary distributing, paving a heat-insulating plate, sealing by foaming adhesive, pouring by secondary distributing and maintaining; the mould comprises a folded surface type bottom mould. The folding-face type UHPC exterior wall cladding has the advantages that the folding-face type UHPC exterior wall cladding is light in texture, high in compressive strength, good in impact resistance and excellent in heat preservation performance, and can meet the requirements of specific assembly type buildings.
Description
Technical Field
The application relates to the technical field of assembly type buildings, in particular to a folded surface type UHPC exterior wall cladding and a manufacturing process thereof.
Background
With the rapid development of the construction industry technology, the prefabricated building attracts people's attention due to the advantages of flexibility and diversity. The prefabricated building refers to a building in which the construction, the accessories, and the like of the building are individually manufactured in a factory in large batches, transported to a construction site, and assembled and installed on the site in a reliable connection manner. Compared with the related building manufacturing technology, the assembly type building omits the complex and slow working procedure of cast-in-place operation, thereby having the advantages of high construction speed, low production cost, rich styles and the like.
The exterior wall cladding is one of the main components of the fabricated building, and has the main functions of heat insulation, seepage resistance, freeze-thaw resistance, carbonization resistance and meeting the requirements of architectural artistic decoration. At present, the manufacture of the exterior wall cladding is mainly divided into two types: one is made of a single material, and the other is made of a composite material; the exterior wall cladding made of a single material has single performance, is difficult to meet multiple building requirements at the same time, and limits the application range; the exterior wall cladding made of the multilayer composite material has the defects of poor physical performance, poor heat insulation performance, heavy self weight and the like, and greatly influences the building quality and the construction efficiency of the fabricated building.
Therefore, it is urgently needed to provide an exterior wall cladding with excellent performance to meet the requirements of the fabricated building.
Disclosure of Invention
In order to improve the service performance of the exterior wall cladding, particularly improve the physical performance of the exterior wall cladding and meet the requirements of an assembly type building, the application provides a folded surface type UHPC exterior wall cladding and a manufacturing process thereof.
In a first aspect, the application provides a folded surface type UHPC exterior wall cladding, adopts following technical scheme:
a surface-folded UHPC exterior wall cladding comprises UHPC concrete and a heat insulation board; the insulation board comprises a special-shaped insulation board.
The application provides a large-size folded surface type UHPC exterior wall cladding with self-heat preservation effect, and compared with exterior wall cladding in the related art, the folded surface type UHPC exterior wall cladding has the characteristics of high folded surface size precision, light weight, good physical property, excellent heat preservation property and the like.
Further, the insulation board is laid inside the UHPC concrete; the insulation board is a siliceous insulation board.
In the application, the heat-insulating plate is laid inside the folded UHPC outer wall hanging plate, so that the decorative effect of a concrete outer wall can be ensured, the waterproof and heat-insulating performance of a wall plate body can be improved, the overall weight of the folded UHPC outer wall hanging plate can be reduced, and the subsequent installation can be efficiently carried out; the siliceous heat-insulating board is used as a heat-insulating material of the folded UHPC exterior wall cladding, and has the advantages of good flame retardance, high temperature resistance, no deformation, stability, reliability and the like.
In a second aspect, the application provides a manufacturing process of a folded UHPC exterior wall hanging plate, which adopts the following technical scheme:
a manufacturing process of a folded UHPC outer wall hanging plate comprises the following steps: cleaning and installing a mould, preparing UHPC concrete, pouring once cloth, paving an insulation board, sealing with foaming glue, pouring twice cloth and maintaining; the mould comprises a folded surface type bottom mould.
The manufacturing process of the folded-surface UHPC exterior wall cladding provided by the application adopts the folded-surface bottom die and the special-shaped heat-insulation board, so that the manufacturing method is simple, the manufacturing cost is low, and the folded surface of the obtained folded-surface UHPC exterior wall cladding is high in size precision, light in weight, good in physical property and excellent in heat-insulation property, so that the folded-surface UHPC exterior wall cladding can be used for building buildings with specific structures.
Preferably, the specific steps for preparing the UHPC concrete are as follows: adding the gel material and quartz sand into a stirrer, and stirring for 0.5-2min at 2-5 r/min; then adding a water reducing agent, a retarder and water with the total water amount of 70-80%, and stirring for 1-2min at 5-10 r/min; finally, adding fiber and water with the total water amount of 20-30 percent, and stirring for 2-3min at the speed of 1-2r/min to obtain UHPC concrete; wherein the fibers are selected from steel fibers, short alkali-resistant glass fibers, polyoxymethylene fibers and polypropylene fibers.
According to the UHPC concrete and the preparation method thereof, the stirring speed and the stirring time of each material in the UHPC concrete are controlled within the above range, so that cement in the UHPC concrete can be completely hydrated and is fully mixed with a water reducing agent, a retarder, fibers and the like, and the UHPC concrete with good fluidity and uniform dispersion is obtained and can completely meet the construction requirements of subsequent cloth pouring.
In the application, the UHPC concrete needs to be kept still for 1-2min after the preparation is finished.
Because UHPC concrete can produce a large amount of bubbles in the preparation process, the bubbles can influence the finish flatness of the folded UHPC exterior wall cladding and the compressive strength and the impact resistance of the folded UHPC exterior wall cladding. Therefore, the UHPC concrete needs to be kept still after being prepared, if the standing time is too short, air bubbles in the UHPC concrete cannot be completely removed, and if the standing time is too long, the fluidity of the UHPC concrete is deteriorated, and the subsequent cloth pouring is influenced. Therefore, the application controls the standing time of the UHPC concrete within 1-2min, so that bubbles in the UHPC concrete can be fully discharged, and the UHPC concrete can be smoothly poured into a mould, thereby obviously improving the flatness and physical properties of the decorative surface of the folded UHPC exterior wall hanging plate.
Preferably, the cleaning and installation of the mould are required before the primary cloth pouring; the concrete steps of the one-time cloth pouring are as follows: and uniformly and continuously distributing the UHPC concrete from the center of the mould, wherein the distribution time is less than or equal to 20min.
In the application, the material is uniformly and continuously distributed from the longitudinal central line of the die in one-time distribution pouring, so that concentrated stacking of UHPC concrete is effectively prevented, and segregation of the UHPC concrete is avoided; so this application with cloth time control in above-mentioned within range, can prevent that the material from appearing condensing and segregation when depositing for a long time in the feed bin, guarantee simultaneously that lower floor's concrete in time carries out the cloth of upper concrete before not initial set.
Preferably, the concrete steps of laying the insulation board are as follows: positioning the rib width in a die by using a prefabricated positioning block, and then paving a heat insulation plate; placing a steel plate on the heat insulation plate, and compacting and fixing the steel plate by using a positioning tool; the special-shaped heat insulation board is laid on the folded surface of the bottom die.
The application provides an contain among the manufacturing technology of book face type UHPC exterior wall cladding and lay the heated board, through utilizing the steel sheet with the heated board compaction, then fix a position fixedly with location frock, can avoid the heated board to take place displacement or come-up at follow-up cloth pouring in-process, and then make the heated board can be fixed the specific position in book face type UHPC exterior wall cladding completely, accurately. In this application, will need to cut into required shape and size with the heated board according to the dimensional requirement of mould in advance, obtain special-shaped heated board, the folded surface position in the mould just in time can directly be laid to shape, the size of this special-shaped heated board, consequently the higher folded surface size precision that has of folded surface type UHPC exterior wall cladding that obtains.
Preferably, the specific steps of the foam rubber sealing are as follows: and sealing the positions of all splicing seams in the mould by using foaming glue.
The position of this application utilizes the foaming adhesive to all splice joints of folded surface type UHPC exterior wall cladding seals, can effectively prevent revealing of UHPC concrete, avoids forming the honeycomb pitted surface on the folded surface type UHPC exterior wall cladding that makes, has improved the facing roughness of folded surface type UHPC exterior wall cladding, has improved folded surface type UHPC exterior wall cladding and compressive strength.
Preferably, the secondary cloth pouring comprises the following specific steps: firstly pouring UHPC concrete on the folded surface part of the bottom die; and then sequentially pouring upwards until the steel bars and the embedded parts are all poured, thereby obtaining the folded UHPC exterior wall cladding prefabricated body.
The UHPC exterior wall cladding that this application was made is the folded surface type, consequently at first will pour the folded surface part of die block in the manufacturing process, avoids UHPC concrete to destroy the location frock in the mould, causes the floor out of plumb, and then influences the structural performance of folded surface type UHPC exterior wall cladding.
Preferably, the curing comprises natural curing and high-temperature curing; the natural maintenance comprises the following specific steps: covering the prefabricated body of the folded UHPC exterior wall cladding with tarpaulin, then maintaining for 22-48h under the conditions that the temperature is 5-40 ℃ and the humidity is less than or equal to 60 percent, and removing the die to obtain the folded UHPC exterior wall cladding formed body.
In the application, the folded-surface UHPC exterior wall cladding prefabricated body obtained after pouring is maintained under natural conditions, so that cement in UHPC concrete can be fully hydrated, the hardening of the folded-surface UHPC exterior wall cladding prefabricated body is accelerated, and the folded-surface UHPC exterior wall cladding with excellent physical strength is obtained.
Preferably, the high-temperature steam curing comprises the following specific steps: and (3) hoisting the folded UHPC exterior wall cladding forming body, and then performing steam curing at 80-100 ℃ for 24-50h to obtain the folded UHPC exterior wall cladding.
In the application, the folded UHPC exterior wall cladding forming body is steamed and cured for 24-50h at 80-100 ℃, so that the undesirable phenomena of shrinkage, cracking and the like of the folded UHPC exterior wall cladding in the later use process can be effectively prevented, the service performance of the folded UHPC exterior wall cladding is improved, and the physical strength of the folded UHPC exterior wall cladding is improved.
Preferably, a step of brushing a release agent is also required between the step of cleaning and installing the mold and the step of pouring the primary cloth, namely brushing the release agent on the surface of the mold; the release agent is a water-based release agent.
In the application, brushing the release agent on the surface of the mold is favorable for demolding of the subsequent UHPC exterior wall cladding, and further selecting the water-based release agent which is nontoxic, tasteless and good in film forming effect, so that the obtained UHPC exterior wall cladding can be guaranteed to have clean, smooth and pollution-free surface.
Drawings
FIG. 1 is a flow chart of the manufacturing process of the corrugated UHPC exterior wall hanging plate provided by the application.
Detailed Description
The application provides a folded surface type UHPC outer wall hanging plate, which comprises UHPC concrete and a heat insulation plate; the UHPC concrete comprises the following components: gel material, quartz sand, water reducing agent, retarder, rigid fiber and water.
The manufacturing process of the folded UHPC exterior wall cladding specifically comprises the following steps:
(1) Preparing UHPC concrete: adding the gel material and quartz sand into a stirrer, and stirring for 0.5-2min at 2-5 r/min; then adding a water reducing agent, a retarder and water with the total water amount of 70-80%, and stirring for 1-2min at 5-10 r/min; finally, adding the steel fiber and water with the total water amount of 20-30%, stirring for 2-3min at the speed of 1-2r/min, and standing for 1-2min to obtain the UHPC concrete.
(2) Cleaning and installing a die: cleaning a bottom die, a side die and/or a frame die and the like; then, mounting a bottom die to enable the bottom die to be supported stably, and leveling by using a level meter; then the side die is arranged on the bottom die by a fastening bolt; in addition, when the folded UHPC exterior wall cladding is provided with a window, a frame mould matched with the size of the window is also required to be installed, and the area formed by the bottom mould, the side mould and the frame mould is the forming area of the folded UHPC exterior wall cladding; wherein, the mould comprises a folded surface type bottom mould.
(3) Brushing a release agent: and (3) coating the water-based release agent on the surface of the mold.
(4) Blanking of reinforcing steel bars: and cutting the steel bars according to the size requirement, wherein the size deviation is less than or equal to 5mm, and placing the steel bars in a forming area of the folded UHPC exterior wall cladding.
(5) Pouring through primary cloth: and uniformly and continuously distributing the UHPC concrete from the longitudinal center line of the mould by using a distributing machine, wherein the distributing time is less than or equal to 20min, a scraper plate is used for auxiliary leveling in time during the distributing process, and the blanking and the leveling are carried out in time when the corners are not flat.
(6) Laying an insulation board: cutting the heat-insulating material into a required shape and size; secondly, positioning the rib width in a mold according to a preset position by utilizing three positioning blocks which are prefabricated in advance and are in a straight shape, an L shape and a T shape; after all positioning is finished, laying the heat-insulating plate, wherein the joints of the heat-insulating plate are tight; placing a steel plate on the heat insulation plate, and compacting and fixing the steel plate by using a positioning tool; the special-shaped heat insulation board is laid on the folded surface of the bottom die.
(7) Installing an embedded part: and placing the embedded parts according to the set positions, and fixedly installing the embedded parts by adopting a special fixing device.
(8) Sealing with foaming glue: and after all the installation and fixation are finished, sealing the positions of all the splicing seams in the die by using foaming glue.
(9) Pouring with secondary cloth: firstly pouring UHPC concrete on the folded surface part of the bottom die; and then sequentially pouring upwards until the steel bars and the embedded parts are all poured, thereby obtaining the folded UHPC exterior wall cladding prefabricated body.
(10) And (4) natural maintenance: after the secondary cloth pouring is finished, covering the prefabricated body of the folded UHPC exterior wall cladding with tarpaulin, then maintaining for 22-48h under the conditions that the temperature is 5-40 ℃ and the humidity is less than or equal to 60 percent, and removing the die to obtain the folded UHPC exterior wall cladding formed body.
(11) High-temperature steam curing: and (3) hoisting the folded UHPC exterior wall cladding forming body, and then performing steam curing at 80-100 ℃ for 24-50h to obtain the folded UHPC exterior wall cladding.
In specific examples of the present application, the gel material was obtained from Daliangrunt building materials, inc.; quartz sand was purchased from Cinchuan qing mine products, inc., lingshu county; the water reducing agent and the retarder are purchased from Jiangsu Subo new materials GmbH; steel fibers were purchased from yunnan chemical company, inc; the water-based release agent is purchased from Jinhuada building materials Co., ltd, hunan; the remaining raw materials, reagents, solvents, etc. are commercially available.
The present application is described in further detail below with reference to preparation examples, illustrations of the drawings, and performance testing tests.
Preparation example
The preparation example provides a UHPC concrete. The UHPC concrete comprises the following components in parts by weight: 1100kg of gel material, 1100kg of quartz sand, 12kg of water reducing agent, 0.8kg of retarder, 180kg of steel fiber and 100kg of water.
The preparation method of the UHPC concrete comprises the following steps:
adding the gel material and quartz sand into a stirrer, and stirring for 1min at 3 r/min; then adding a water reducing agent, a retarder and water with the total water amount of 70 percent, and stirring for 2min at 8 r/min; and finally adding the rigid fiber and water with the total water amount of 30 percent, stirring for 2min at the speed of 1r/min, and standing for 2min to obtain the UHPC concrete.
Examples
Example 1
Embodiment 1 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The manufacturing process of the folded UHPC exterior wall cladding specifically comprises the following steps:
(1) Preparation of UHPC concrete: UHPC concrete was prepared according to the method of the preparation examples.
(2) Cleaning and installing a die: cleaning a bottom die, a side die, a frame die and the like; mounting a bottom die to enable the bottom die to be supported stably, and leveling by using a level meter; then mounting the side die on the bottom die by using a fastening bolt, wherein the area formed by the bottom die, the side die and the frame die is the forming area of the folded surface type UHPC outer wall hanging plate; wherein, the mould comprises a folded surface type bottom mould.
(3) Brushing a release agent: and (3) coating the water-based release agent on the surface of the mold.
(4) Blanking of reinforcing steel bars: and cutting the steel bars according to the size requirement, wherein the size deviation is less than or equal to 5mm, and placing the steel bars in a forming area of the folded UHPC exterior wall cladding.
(5) Pouring through primary cloth: the UHPC concrete provided by preparation example 1 is uniformly and continuously distributed from the longitudinal center line of the mould by a distributing machine, the distributing time is 15min, a scraper plate is used for auxiliary leveling in time during the distributing process, and the blanking and the leveling are carried out in time when the corners are not flat.
(6) Laying an insulation board: cutting the heat-insulating material into required shape and size; secondly, positioning the rib width in a mold according to a preset position by utilizing three positioning blocks which are prefabricated in advance and are in a straight shape, an L shape and a T shape; after all positioning is finished, laying the heat-insulating plates, wherein the abutted seams of the heat-insulating plates are tight; placing a steel plate on the heat insulation plate, and compacting and fixing the steel plate by using a positioning tool; the special-shaped heat insulation board is laid on the folded surface of the bottom die.
(7) Installing an embedded part: and placing the embedded parts according to the set positions, and fixedly installing by adopting a special fixing device.
(8) Sealing with foaming glue: and after all the installation and fixation are finished, sealing the positions of all the splicing seams in the die by using foaming glue.
(9) Pouring with secondary cloth: firstly, pouring UHPC concrete on the folded surface part of a bottom die; and sequentially pouring upwards until the steel bars and the embedded parts are all poured, thereby obtaining the folded UHPC exterior wall cladding prefabricated body.
(10) And (4) natural maintenance: and after the secondary cloth is poured, covering the folded UHPC exterior wall cladding prefabricated body with tarpaulin, curing for 35 hours under the conditions that the temperature is 20 ℃ and the humidity is 50%, and removing the mould to obtain the folded UHPC exterior wall cladding prefabricated body.
(11) High-temperature steam curing: and (3) hoisting the folded UHPC exterior wall cladding forming body, and then performing steam curing at 95 ℃ for 40h to obtain the folded UHPC exterior wall cladding of 3m multiplied by 0.4 m.
Example 2
Embodiment 2 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: and a step of distributing and pouring once.
In the manufacturing process of the folded UHPC exterior wall cladding provided by the embodiment 2, the material distribution time for one-time material distribution and pouring is 20min.
Example 3
Embodiment 3 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: and (5) naturally curing.
The concrete steps of the natural maintenance of the folded-surface UHPC exterior wall hanging plate provided by the embodiment 3 are as follows: and after the secondary cloth pouring is finished, covering the prefabricated body of the folded UHPC exterior wall cladding with tarpaulin, then maintaining for 22h under the conditions that the temperature is 40 ℃ and the humidity is 50%, and removing the die to obtain the folded UHPC exterior wall cladding formed body.
Example 4
Embodiment 4 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: and (5) naturally curing.
The concrete steps of the natural maintenance of the folded-surface UHPC exterior wall hanging plate provided by the embodiment 4 are as follows: and after the secondary cloth pouring is finished, covering the prefabricated body of the folded UHPC exterior wall cladding with tarpaulin, then maintaining for 50h under the conditions that the temperature is 20 ℃ and the humidity is 60%, and removing the die to obtain the folded UHPC exterior wall cladding formed body.
Example 5
Embodiment 5 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: and (5) naturally curing.
The natural maintenance of the folded UHPC exterior wall hanging plate provided by the embodiment 5 comprises the following specific steps: and after the secondary cloth is poured, covering the folded UHPC exterior wall cladding prefabricated body with tarpaulin, curing for 55 hours under the conditions that the temperature is 0 ℃ and the humidity is 50%, and removing the mould to obtain the folded UHPC exterior wall cladding prefabricated body.
Example 6
Embodiment 6 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: and (5) high-temperature curing.
The embodiment 6 provides a high-temperature steam-curing method of the folded UHPC exterior wall cladding, which comprises the following steps: and (3) hoisting the folded UHPC exterior wall cladding forming body, and then performing steam curing at 80 ℃ for 50h to obtain the folded UHPC exterior wall cladding.
Example 7
Embodiment 7 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: and (5) high-temperature curing.
The embodiment 7 provides a high-temperature steam-curing method of the folded UHPC exterior wall cladding, which comprises the following steps: and hoisting the folded UHPC exterior wall cladding forming body, and then performing steam curing at 100 ℃ for 24 hours to obtain the folded UHPC exterior wall cladding.
Example 8
Embodiment 8 provides a manufacturing process of a corrugated UHPC exterior wall cladding.
The above embodiment differs from embodiment 1 in that: examples step of brushing release agent.
The step of brushing the release agent for the folded UHPC exterior wall cladding provided by the embodiment 8 comprises the following specific steps: coating an oily release agent on the surface of the mold; the model of the oily release agent is MK-CR-2 which is purchased from American chemical Co., ltd.
Comparative example
Comparative example 1
Comparative example 1 provides a folded-surface UHPC exterior wall cladding.
The comparative example described above differs from example 1 in that: in the manufacturing process of the folded UHPC exterior wall cladding provided by the comparative example 1, the material distribution time for one-time material distribution and pouring is 30min.
Comparative example 2
Comparative example 2 provides a folded-surface UHPC exterior wall cladding.
The comparative example described above differs from example 1 in that: and laying an insulation board.
The specific steps of laying the heat-insulating plate of the folded UHPC exterior wall cladding provided by the comparative example 2 are as follows: cutting the heat-insulating material into a required shape and size; secondly, positioning the rib width in a mold according to a preset position by utilizing three positioning blocks which are prefabricated in advance and are in a straight shape, an L shape and a T shape; after all positioning is finished, laying the heat-insulating plate, wherein the joints of the heat-insulating plate are tight; the special-shaped heat insulation board is laid on the folded surface of the bottom die.
Comparative example 3
Comparative example 3 provides a UHPC exterior wall cladding.
(1) Preparing a mould: cleaning the surface of a mold, wherein the mold comprises a bottom mold and a side mold, and the bottom mold is arranged on a corresponding transfer assembly;
(2) Cleaning the bottom die: cleaning and spraying the upper bearing surface of the bottom die by using a cleaner and a sprayer;
(3) Scribing by a scribing machine: carrying out scribing operation on the bearing upper surface in the step S2 by using a scribing machine so as to form a scribing area for mounting the side die;
(4) Installing a side die: installing and positioning the side formwork installation marking area, and matching the side formwork installation marking area with the upper surface of the bearing to form a forming area;
(5) Installing a steel bar mesh: placing a reinforcing mesh in the forming area along the upper surface parallel to the bearing surface;
(6) Primary cloth pouring: pouring and pouring the UHPC concrete provided by the preparation example 1 into a molding area by using a material distributor, and then vibrating a vibrating table to form a first pouring body;
(7) Installing a heat insulation plate: laying the insulation board above the first casting body;
(8) Installing a reinforcement cage: installing the reinforcement cage, wherein the end part of the reinforcement cage can extend out of the hole site of the side form to be used as a subsequent connecting end; then, mounting a connecting piece;
(9) Secondary material distribution and pouring: pouring UHPC concrete into a casting body which is formed by surrounding a side die above the first casting body by using a distributing machine to finish secondary casting; then vibrating a vibrating table to enable the concrete poured for the second time to be flat in layout and air bubbles are arranged side by side to form a second poured body, and embedding a reinforcement cage and a connecting piece in the second poured body to further form a UHPC external wall panel prefabricated body;
(10) Manual plastering: the upper surface of the UHPC exterior wall cladding prefabricated body is ground and smoothed;
(11) Pre-curing operation; placing the UHPC exterior wall cladding prefabricated body into a pre-curing cellar;
(12) Smearing by a machine; using a troweling machine to trowel the upper surface of the UHPC external wall panel prefabricated body;
(13) And (3) maintenance operation: placing the external wall panel prefabricated body into a curing cellar for 8h curing to obtain a UHPC external wall cladding forming body;
(14) Disassembling the die: firstly, side formwork dismantling operation is carried out, then bottom surface dismantling operation is carried out, in the bottom surface dismantling operation process, firstly, a bottom formwork is overturned and inclined for a certain angle through a turnover trigger, and then the UHPCb exterior wall cladding is separated from the bearing upper surface through transportation equipment and moved out, so that the UHPC exterior wall cladding can be obtained.
Performance test
The compressive strength, impact resistance, shrinkage rate, heat preservation performance and outer surface of the UHPC outer wall cladding obtained in the examples 1-8 and the comparative examples 1-3 of the application are tested.
(1) The heat-insulating property detection method refers to GB/T13475-2008, and the heat-insulating properties of the folded-face UHPC exterior wall cladding obtained in the embodiments 1-8 of the application are detected to be in accordance with GBT50176-2016 civil building thermal engineering design specifications.
(2) The compressive strength detection method refers to T/CBMF37-2018; the impact resistance detection method refers to GB/T30100-2013; shrinkage detection method reference GBJ82; the surface defect test is to check whether the outer surface of the UHPC outer wall hanging plate has the bad phenomena of surface honeycomb pitted surface, air bubbles, cracks, unevenness and the like, and the detection result is shown in Table 1.
TABLE 1 Performance test results of the corrugated UHPC exterior wall cladding obtained in examples 1-8 and comparative examples 1-3
According to the detection results in Table 1, the compressive strength of the corrugated UHPC exterior wall cladding obtained in the embodiments 1-8 of the application is more than or equal to 120Mpa, the impact resistance is more than or equal to 5 times, and the shrinkage rate is less than or equal to 0.06%; the compressive strength of the folded surface type UHPC exterior wall cladding obtained in the comparative example 2 is 111Mpa, the impact resistance is 4 times, and the shrinkage rate is 0.07%; the UHPC exterior wall cladding obtained in comparative example 3 had a compressive strength of 108Mpa and an impact resistance of 4 times (a small amount of cracks occurred after the 5 th impact), and the UHPC exterior wall cladding had bubbles and a small amount of honeycomb pitted surface on the outer surface. Therefore, the manufacturing process of the folded-surface UHPC exterior wall cladding provided by the application can obtain the folded-surface UHPC exterior wall cladding, and the obtained folded-surface UHPC exterior wall cladding has the advantages of excellent compressive strength, good impact resistance, low shrinkage and basically no defect on the surface.
According to the detection results of the examples 1-2 and the comparative example 1, the compression strength of the folded UHPC exterior wall cladding obtained in the examples 1-2 is 135MPa and 125MPa, the impact resistance is more than or equal to 5 times, and the shrinkage rate is 0.03 percent and 0.04 percent; the compressive strength of the folded UHPC exterior wall cladding obtained in the comparative example 1 is 108Mpa, the impact resistance is 4 times, and the shrinkage rate is 0.04 percent. Therefore, the application controls the one-time material distribution pouring time in the manufacturing process of the folded UHPC exterior wall cladding to be less than or equal to 20min, and the folded UHPC exterior wall cladding with high compressive strength can be obtained.
According to the detection results of the embodiment 1 and the embodiments 3 to 5, the temperature in the natural curing step is controlled to be 5 to 40 ℃, the humidity is controlled to be less than or equal to 60 percent, the curing time is controlled to be 22 to 48 hours, the compressive strength of the obtained folded UHPC exterior wall cladding is more than 125MPa, the shrinkage rate is less than or equal to 0.05 percent, the surface is smooth, and no bad phenomenon exists; in example 5, the temperature and humidity in the natural curing step were controlled at 0 deg.c, 50% and the curing time was controlled at 55h, and the obtained folded-surface type UHPC exterior wall cladding had a compressive strength of 120Mpa, a shrinkage of 0.06% and a small amount of fine lines on the surface.
According to the detection results of the embodiment 1 and the embodiments 6 to 7, the temperature in the high-temperature steaming step is controlled to be 80-100 ℃ and the time is controlled to be 24-50h in the embodiment 1 and the embodiments 6 to 7, the compressive strength of the obtained folded UHPC exterior wall cladding is larger than 130Mpa, the impact resistance is larger than or equal to 5 times, the shrinkage rate is smaller than or equal to 0.05 percent, and the surface is smooth and has no bad phenomenon.
According to the detection results of the embodiment 1 and the embodiment 8, the surface of the folded-surface UHPC exterior wall cladding obtained by adopting the water-based release agent in the embodiment 8 contains a small amount of air bubbles, while the surface of the folded-surface UHPC exterior wall cladding obtained by adopting the water-based release agent in the embodiment 1 is flat and has no bad phenomenon. Therefore, the water-based release agent is adopted in the manufacturing process of the folded UHPC exterior wall cladding provided by the application, so that the surface smoothness of the folded UHPC exterior wall cladding can be further improved, and the quality of the folded UHPC exterior wall cladding is improved.
To sum up, the application provides a preparation technology of a folded surface type UHPC exterior wall cladding, and this preparation technology has advantages such as easy operation, high, the cost is low of production efficiency, and the folded surface type UHPC exterior wall cladding that utilizes above-mentioned preparation technology to obtain has advantages such as light in weight, good physical properties, folded surface size precision height, thermal insulation performance are excellent.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A folded surface type UHPC exterior wall cladding is characterized in that the folded surface type UHPC exterior wall cladding comprises UHPC concrete and a heat insulation plate; the insulation board comprises a special-shaped insulation board.
2. A process for making a corrugated UHPC exterior wall cladding according to claim 1, comprising the steps of: cleaning and installing a mould, preparing UHPC concrete, pouring by primary distributing, paving a heat-insulating plate, sealing by foaming adhesive, pouring by secondary distributing and maintaining; the mould comprises a folded surface type bottom mould.
3. The manufacturing process of the folded UHPC external wall hanging plate according to claim 2, wherein the concrete steps of one-time cloth pouring are as follows: and uniformly and continuously distributing the UHPC concrete from the center of the mould, wherein the distribution time is less than or equal to 20min.
4. The manufacturing process of the corrugated UHPC external wall hanging plate according to claim 2, wherein the concrete steps of laying the heat insulation plate are as follows: positioning the rib width in a die by using a prefabricated positioning block, and then paving a heat insulation plate; placing a steel plate on the heat insulation plate, and compacting and fixing the steel plate by using a positioning tool; the special-shaped heat insulation board is laid on the folded surface of the bottom die.
5. The manufacturing process of the folded UHPC outer wall hanging plate according to claim 2, wherein the specific steps of the foam rubber sealing are as follows: and sealing the positions of all splicing seams in the mould by using foaming glue.
6. The manufacturing process of the folded UHPC external wall hanging plate according to claim 2, wherein the secondary cloth pouring comprises the following specific steps: firstly pouring UHPC concrete on the folded surface part of the bottom die; and then sequentially pouring upwards until the steel bars and the embedded parts are all poured, thereby obtaining the folded UHPC exterior wall cladding prefabricated body.
7. The manufacturing process of the folded UHPC exterior wall hanging plate according to claim 2, wherein the maintenance comprises natural maintenance and high-temperature maintenance; the natural maintenance comprises the following specific steps: covering the prefabricated body of the folded UHPC exterior wall cladding with tarpaulin, then maintaining for 22-48h under the conditions that the temperature is 5-40 ℃ and the humidity is less than or equal to 60 percent, and removing the die to obtain the folded UHPC exterior wall cladding formed body.
8. The manufacturing process of the folded UHPC outer wall hanging plate according to claim 2, characterized in that the high-temperature steam curing comprises the following specific steps: and (3) hoisting the folded UHPC exterior wall cladding forming body, and then performing steam curing at 80-100 ℃ for 24-50h to obtain the folded UHPC exterior wall cladding.
9. The manufacturing process of the folded UHPC external wall hanging plate according to claim 2, wherein a release agent is required to be brushed between the step of cleaning and installing the mould and the step of pouring the cloth at one time; the specific steps of brushing the release agent are as follows: brushing a release agent on the surface of the mold; the release agent is a water-based release agent.
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