CN115198948A - Recycled aggregate concrete laminated slab and production process thereof - Google Patents
Recycled aggregate concrete laminated slab and production process thereof Download PDFInfo
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- CN115198948A CN115198948A CN202210982480.0A CN202210982480A CN115198948A CN 115198948 A CN115198948 A CN 115198948A CN 202210982480 A CN202210982480 A CN 202210982480A CN 115198948 A CN115198948 A CN 115198948A
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
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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
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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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
- 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
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/065—Light-weight girders, e.g. with precast parts
- E04C5/0653—Light-weight girders, e.g. with precast parts with precast parts
- E04C5/0656—Light-weight girders, e.g. with precast parts with precast parts with lost formwork
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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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)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention relates to a recycled aggregate concrete laminated slab and a production process thereof. The recycled aggregate concrete laminated slab comprises a prefabricated recycled aggregate concrete layer and a reinforcing mesh; the reinforcing mesh comprises reinforcing steel bar trusses, longitudinal stress reinforcing steel bars at the bottom of the plate and transverse structural reinforcing steel bars at the bottom of the plate, the reinforcing steel bar trusses are evenly arranged in a prefabricated recycled aggregate concrete layer at intervals, the longitudinal stress reinforcing steel bars of the bottom plate are embedded in the prefabricated recycled aggregate concrete layer and parallelly penetrate through the length direction of the prefabricated recycled aggregate concrete layer, the longitudinal stress reinforcing steel bars of the bottom plate are evenly arranged among the reinforcing steel bar trusses, the transverse structural reinforcing steel bars at the bottom of the plate are embedded in the prefabricated recycled aggregate concrete layer, and the transverse structural reinforcing steel bars at the bottom of the plate parallelly penetrate through the width direction of the prefabricated recycled aggregate concrete layer. The invention ensures that the recycled aggregate concrete laminated slab has good bearing capacity and durability, and the prefabricated recycled aggregate concrete layer is adopted, so that the raw material cost is greatly reduced, and the production cost of the recycled aggregate concrete laminated slab is further saved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a recycled aggregate concrete laminated slab and a production process thereof.
Background
With the great push of the assembled building in China, the assembled building is more and more common, the prefabricated composite slab is the most widely applied prefabricated component in the assembled building, but the manufacturing cost of the prefabricated composite slab is much higher than that of a common cast-in-place concrete slab due to the production process, transportation and the like, so that the construction cost of the assembled building is very high, the popularization and application of the assembled building are greatly limited, and the reduction of the production cost of the prefabricated composite slab is very important.
With the rapid development of the construction industry, billions of tons of construction wastes are generated in China every year, but the resource rate is very low and is only about 5%, and the construction resources are seriously wasted. The aggregate is formed by crushing, screening and cleaning the construction wastes such as waste concrete and the like, and is applied to the concrete to form the recycled aggregate concrete. The recycled aggregate concrete is a novel green and environment-friendly building material, has much lower cost than common concrete, and has wide application prospect and remarkable economic and environmental benefits.
How to combine recycled aggregate concrete with fabricated building is a very worthy topic to be researched.
Disclosure of Invention
In order to solve the technical problems, the invention provides a recycled aggregate concrete laminated slab and a production process thereof.
In a first aspect, the invention provides a recycled aggregate concrete composite slab, which adopts the following technical scheme:
a recycled aggregate concrete laminated slab comprises a prefabricated recycled aggregate concrete layer and a reinforcing mesh;
the reinforcing bar net includes the horizontal structure reinforcing bar at the bottom of a plurality of steel bar trusses, the vertical atress reinforcing bar of a plurality of boards and a plurality of boards, the steel bar truss is followed the even setting in width direction interval on prefabricated regeneration aggregate concrete layer is in the prefabricated regeneration aggregate concrete layer, the vertical atress reinforcing bar of bottom plate is pre-buried the inside on prefabricated regeneration aggregate concrete layer, and the parallel runs through the length direction on prefabricated regeneration aggregate concrete layer is two adjacent be equipped with one between the steel bar truss the vertical atress reinforcing bar of bottom plate, the horizontal structure reinforcing bar of board bottom is pre-buried the inside on prefabricated regeneration aggregate concrete layer, the horizontal structure reinforcing bar parallel runs through the width direction on prefabricated regeneration aggregate concrete layer at the bottom of the board.
By adopting the technical scheme, the recycled aggregate concrete laminated slab is ensured to have good bearing capacity and durability, and the prefabricated recycled aggregate concrete layer is adopted, so that the raw material cost is greatly reduced, and the production cost of the recycled aggregate concrete laminated slab is saved.
Preferably, the steel bar truss comprises an upper chord rib, two lower chord ribs and two wave-shaped web ribs, the two lower chord ribs are embedded in the lower portion of the prefabricated recycled aggregate concrete layer in parallel, the lower chord ribs penetrate through the length direction of the prefabricated recycled aggregate concrete layer, the upper chord ribs are arranged above the prefabricated recycled aggregate concrete layer, the longitudinal sections of the upper chord ribs and the two lower chord ribs form a triangle, and the two wave-shaped web ribs are respectively welded with the upper chord ribs and one of the lower chord ribs at the wave crest and the wave trough.
Through adopting above-mentioned technical scheme, the lower chord reinforcing bar uses as prefabricated recycled aggregate concrete superimposed sheet's atress reinforcing bar concurrently, and with the vertical atress reinforcing bar atress in coordination at the bottom of the board, has guaranteed prefabricated recycled aggregate concrete superimposed sheet's bearing capacity, sets up wave web member and has improved steel bar truss's steadiness.
Preferably, the distance between two adjacent steel bar trusses is 500-600mm.
In a second aspect, the invention provides a production process of a recycled aggregate concrete laminated slab, which adopts the following technical scheme:
a production process of a recycled aggregate concrete laminated slab comprises the following steps:
arranging and binding steel bars, processing the steel bars, and placing, binding and fixing the processed steel bars according to the specification interval required by a construction drawing;
preparing concrete raw materials, preparing cement, common aggregate, recycled aggregate, an additive and clear water according to a production plan, checking the delivery certification and quality qualification certificate of the raw materials, performing quality sampling inspection, and transporting the raw materials to a concrete production area after the inspection is correct;
preparing recycled aggregate concrete, namely preparing the recycled aggregate concrete according to a well-determined mixing ratio by a test, wherein the mixing ratio of the recycled aggregate concrete is determined by the test according to the conditions of the strength grade of the concrete, the air temperature, the source of the recycled aggregate and the mixing ratio;
pouring the recycled bone concrete, and pouring the recycled aggregate concrete composite slab after the steel bars are bound without errors, wherein the pouring of the concrete is continuously carried out, and if the concrete is required to be intermittently poured, the intermittent time is required to finish the pouring of the secondary layer of concrete before the primary setting of the recycled aggregate concrete of the front layer;
vibrating the recycled bone concrete, and fully vibrating the prefabricated aggregate concrete laminated slab by using a vibrating table;
and (3) concrete surface curing, covering the recycled aggregate concrete laminated slab with plastic cloth after the recycled aggregate concrete laminated slab is poured, and adopting watering curing to ensure that the surface of the recycled aggregate concrete laminated slab is always in a wet state and the watering curing time is not less than 20 days after the recycled aggregate concrete laminated slab reaches final setting.
By adopting the technical scheme, the production quality of the recycled aggregate concrete laminated slab can be ensured through the production process, the construction cost of the fabricated building can be greatly reduced by popularizing the recycled aggregate concrete laminated slab, the problem of building waste resource waste is effectively solved, the popularization and application of the fabricated building are promoted, the resource utilization rate of building waste is increased, and the production process has very long practical significance for realizing the sustainable development of the building industry.
Preferably, before the step of arranging and binding the reinforcing steel bars, the method further comprises the following steps:
and installing the die.
Preferably, the step of installing the mold specifically includes:
cleaning a mould, cleaning the mould assembly and cleaning concrete residues on the surface and the holes of the mould assembly, wherein the mould assembly comprises a bottom mould, a side mould and a connecting piece;
inspecting the repaired mould, inspecting the appearance quality of the mould, repairing the defect position, and replacing a new mould in time when the mould cannot be repaired;
installing a mould accessory, installing and fixing the side mould, and paving a cushion block on the bottom mould;
and (3) coating mold oil, wherein the surface of the assembled mold assembly is coated with the oil, and the contact surfaces of the bottom mold and the side mold and the recycled aggregate concrete are coated with the oil.
Preferably, the step of processing the steel bars specifically includes:
preparing a steel bar material, namely preparing the steel bar material according to a production plan, extracting a steel bar test according to specification and stipulating to carry out steel bar mechanical property test, and transporting the steel bar material to a steel bar processing area after all tests are qualified;
processing a steel bar material, straightening the steel bar by using mechanical equipment, hooking the end of the stressed steel bar, wherein the bending inner diameter of the hook is not less than 4 times of the diameter of the steel bar, and configuring a label on the processed steel bar and marking.
Preferably, after the concrete surface curing step, the method further comprises the following steps:
and demolding the recycled aggregate concrete laminated slab.
Preferably, the step of demoulding the recycled aggregate concrete composite slab specifically comprises:
performing quality inspection on the recycled aggregate concrete laminated slab, inspecting whether the surface of the recycled aggregate concrete laminated slab has cracks, insufficient depth of brush hair on a rough surface and defects of bending damage of reinforcing steel bars, and measuring whether the size of the recycled aggregate concrete laminated slab has large errors;
it is right regeneration aggregate concrete superimposed sheet restores, right the defect that regeneration aggregate concrete superimposed sheet appears is repaired, and the useless spare that makes that can't repair is handled.
Preferably, after the member demolding step, the method further includes:
and (4) transferring and storing, namely transferring the recycled aggregate concrete laminated slab with qualified production quality to a product storage area for storage.
In summary, the invention has the following beneficial technical effects:
1. the recycled aggregate concrete composite slab ensures that the recycled aggregate concrete composite slab has good bearing capacity and durability, the prefabricated recycled aggregate concrete layer is adopted, the raw material cost is greatly reduced, the production cost of the recycled aggregate concrete composite slab is further saved, the lower chord steel bars are used as the stress steel bars of the prefabricated recycled aggregate concrete composite slab and are stressed in cooperation with the longitudinal stress steel bars at the bottom of the slab, the bearing capacity of the prefabricated recycled aggregate concrete composite slab is ensured, and the stability of a steel bar truss is improved due to the arrangement of the wave-shaped web bars;
2. according to the production process of the recycled aggregate concrete laminated slab, the production quality of the recycled aggregate concrete laminated slab can be ensured, the construction cost of the fabricated building can be greatly reduced by popularizing the recycled aggregate concrete laminated slab, the popularization and application of the fabricated building are promoted, the resource utilization rate of construction wastes is increased, and the production process has a very long practical significance in realizing sustainable development of the building industry.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention.
FIG. 2 is a schematic cross-sectional view of a prefabricated recycled aggregate concrete composite slab.
Fig. 3 is a schematic cross-sectional view of the steel bar truss of fig. 1.
Fig. 4 is a schematic view of the arrangement of the stressed steel bars and the distribution steel bars.
FIG. 5 is a flow chart of the production process of the present invention.
Description of reference numerals: 1. prefabricating a recycled aggregate concrete layer;
2. a reinforcing mesh;
21. a steel bar truss; 211. winding ribs; 212. a lower chord rib; 213. wave-shaped abdominal muscle;
22. longitudinal stress steel bars at the bottom of the plate; 23. and (5) transversely constructing reinforcing steel bars at the bottom of the plate.
Detailed Description
The present invention is described in further detail below with reference to FIGS. 1-5.
Example 1
The embodiment of the invention discloses a recycled aggregate concrete laminated slab. Referring to fig. 1, the recycled aggregate concrete laminated slab comprises a prefabricated recycled aggregate concrete layer 1 and a reinforcing mesh 2, wherein the prefabricated recycled aggregate concrete layer 1 is cast by concrete doped with I-type or II-type recycled coarse aggregates, the recycled coarse aggregates are aggregates prepared by crushing, screening and grading building wastes, the quality and the grading of the aggregates are strictly specified by national standard 'recycled coarse aggregates for concrete' GB/T25177, the doping proportion of the recycled coarse aggregates accounts for 10% -50% of the total amount of the coarse aggregates, the strength grade of the recycled aggregate concrete is not less than C35, and the mixing proportion for preparing the recycled aggregate concrete is determined according to the tests of the aggregate type, the recycled aggregate source and the doping proportion, the concrete strength grade, the air temperature and other conditions so as to ensure that the recycled aggregate concrete laminated slab has good bearing capacity and durability;
the reinforcing mesh 2 comprises a plurality of steel bar trusses 21, a plurality of plate bottom longitudinal stress steel bars 22 and a plurality of plate bottom transverse structural steel bars 23, the steel bar trusses 21 are uniformly arranged in the prefabricated regenerative aggregate concrete layer 1 along the width direction of the prefabricated regenerative aggregate concrete layer 1 at intervals, the gauge of two adjacent steel bar trusses 21 is 600mm, the bottom plate longitudinal stress steel bars 22 are pre-embedded in the prefabricated regenerative aggregate concrete layer 1 and parallelly penetrate through the length direction of the prefabricated regenerative aggregate concrete layer 1, one bottom plate longitudinal stress steel bar 22 is arranged between the two adjacent steel bar trusses 21, the plate bottom transverse structural steel bars 23 are pre-embedded in the prefabricated regenerative aggregate concrete layer 1, and the plate bottom transverse structural steel bars 23 parallelly penetrate through the width direction of the prefabricated regenerative aggregate concrete layer 1.
Specifically, the steel bar truss 21 comprises an upper chord rib 211, two lower chord ribs 212 and two wavy web ribs 213, the two lower chord ribs 212 are embedded at the lower part of the prefabricated recycled aggregate concrete layer 1 in parallel, the lower chord ribs 212 penetrate through the length direction of the prefabricated recycled aggregate concrete layer 1, the upper chord rib 211 is arranged above the prefabricated recycled aggregate concrete layer 1, the longitudinal sections of the upper chord rib 211 and the two lower chord ribs 212 form a triangle, the two wavy web ribs 213 are respectively welded with the upper chord ribs 211 and one of the lower chord ribs 212 at wave crests and wave troughs, the lower chord ribs 212 are used as stressed ribs of the prefabricated recycled aggregate concrete laminated slab and cooperate with the longitudinal stressed steel bars 22 at the bottom of the slab to bear force, and the bearing capacity of the prefabricated recycled aggregate concrete laminated slab is guaranteed.
The embodiment of the invention also discloses a production process of the recycled aggregate concrete laminated slab.
Example 2
A production process of a recycled aggregate concrete laminated slab comprises the following steps:
100. installing a die;
wherein, step 100 specifically comprises:
101. cleaning a mould, cleaning the mould assembly and cleaning concrete residues on the surface and the holes of the mould assembly, wherein the mould assembly comprises a bottom mould, a side mould and a connecting piece;
102. inspecting the repaired mould, inspecting the appearance quality of the mould, repairing the defect position, and replacing a new mould in time when the mould cannot be repaired;
103. installing a mould accessory, installing and fixing the side mould, and paving a cushion block on the bottom mould;
104. and (3) coating mold oil, namely coating the surface of the assembled mold assembly with oil, wherein the contact surfaces of the bottom mold and the side mold and the recycled aggregate concrete need to be coated with oil.
200. Arranging and binding steel bars;
wherein, step 200 specifically comprises:
201. preparing a steel bar material, namely preparing the steel bar material according to a production plan, checking the quality of labels and appearances such as delivery certification and quality qualification certification of steel products, straightening the steel bar without damage, and extracting a steel bar test according to the specification to perform mechanical performance test of the steel bar, wherein the steel bar material is transported to a steel bar processing area after all tests are qualified;
202. processing a steel bar material, namely straightening the steel bar by using mechanical equipment; clearly marking on a workbench according to the grade, the diameter, the shape and the blanking length of the steel bar provided by the steel bar batching sheet so as to ensure the accuracy of the blanking length; the end of the stressed steel bar needs to be hooked, the bending inner diameter at the hook is not less than 4 times of the diameter of the steel bar, and the length of the bent part of the hook is required to meet the design requirement; the processed steel bars are provided with labels and marked;
203. arranging and binding the steel bars, namely arranging the processed steel bars according to the specification interval required by a construction drawing, binding and fixing the processed steel bars, paying attention to the arrangement sequence when arranging the steel bars, arranging the steel bar trusses 21 firstly, placing the lower chord bars 212 on the bottommost layer, then evenly arranging the plate bottom longitudinal stress steel bars 22 between the steel bar trusses 21, and vertically placing the plate bottom transverse structural steel bars 23 on the plate bottom longitudinal stress steel bars 22 and the lower chord bars 212 of the steel bar trusses 21 so as to ensure the effective height of the plate bottom longitudinal stress steel bars 22 and the bearing capacity of the laminated slab;
204. and (4) checking and accepting the steel bars: after the binding of the steel bars is finished, carrying out concealed engineering acceptance, and checking the variety, diameter, quantity, position, interval, shape and size of the steel bars; checking whether the thickness of the concrete protective layer, the structural steel bars, the embedded parts and the like meet the requirements or not; checking the joints of the steel bars, wherein the joints comprise the lap joint length of the steel bars, the positions and the number of the joints, the joint percentage, the staggered length and the like; and (5) timely correcting and rechecking the problems generated in the inspection, and making a steel bar concealing project record.
300. Pouring concrete;
wherein, step 300 specifically includes:
301. preparing concrete raw materials, preparing raw materials such as cement, common aggregate, recycled aggregate, an additive, clear water and the like according to a production plan, checking the raw materials for delivery certification and quality certification, performing quality sampling inspection, and transporting the raw materials to a concrete production area after the inspection is correct;
it should be noted that, in this embodiment, the cement dosage per cubic meter of concrete is 280kg/m, and the common aggregate is divided into common fine aggregate and common coarse aggregate, wherein the common fine aggregate is 758 kg/m, the common coarse aggregate is 672kg/m, the recycled aggregate is 290kg/m, the admixture is 9.1kg/m, and the clear water is 175 kg/m.
302. Preparing recycled aggregate concrete, namely preparing the recycled aggregate concrete according to the well-determined mixing proportion by tests, wherein the mixing proportion of the concrete is determined by tests according to conditions such as concrete strength grade, air temperature, recycled aggregate source and mixing proportion;
303. pouring the recycled aggregate concrete laminated slab, after the die is installed and the steel bars are bound without errors, pouring the recycled aggregate concrete layer 1, wherein the pouring work is continuously carried out, if necessary, the batch time is shortened as much as possible, and the secondary layer of recycled aggregate concrete is poured before the primary setting of the front layer of recycled aggregate concrete;
304. vibrating the recycled aggregate concrete, pouring the concrete and vibrating the concrete simultaneously, and ensuring the compactness of the concrete;
305. brushing the surface of the concrete, and brushing the surface of a recycled aggregate concrete layer 1 by using a steel brush before the recycled aggregate concrete is initially set, wherein the brushing depth is 4mm.
It should be noted that the specific steps in step 100, step 200 and step 300 may be performed alternately, for example, while the mold is cleaned, the reinforcing steel bar material processing and the recycled aggregate concrete preparation may be performed, so as to improve the production efficiency.
400. Curing the concrete surface;
wherein, step 400 specifically comprises:
401. covering a film on the surface of the concrete for maintenance, pouring the prefabricated recycled aggregate concrete layer 1, brushing the surface of the concrete, and then covering the concrete with plastic cloth to reduce the evaporation of water before the final setting of the recycled aggregate concrete;
402. and (3) watering and maintaining the surface of the concrete, wherein after the recycled aggregate concrete reaches final setting, watering and maintaining are adopted, and watering is timely carried out according to the wetting state of the surface of the prefabricated recycled aggregate concrete layer 1, so that the surface of the prefabricated recycled aggregate concrete layer 1 is always in the wetting state, and the watering and maintaining time is not less than 20 days.
500. Demolding the recycled aggregate concrete laminated slab;
specifically, the step 500 specifically includes:
501. after the recycled aggregate concrete laminated slab is cured, the strength of the concrete is not lower than 75% of the designed strength, and demolding can be carried out;
502. carrying out quality inspection on the recycled aggregate concrete laminated slab, inspecting whether the surface of the recycled aggregate concrete laminated slab has cracks, insufficient depth of brush hair on the rough surface and the defects of bending damage of reinforcing steel bars, and measuring whether the size of the recycled aggregate concrete laminated slab has large errors;
503. restore recycled aggregate concrete superimposed sheet, it is right the defect that recycled aggregate concrete superimposed sheet appears is repaired, and the useless spare that makes that can't repair is handled.
600. And (4) transferring and storing, namely transferring the recycled aggregate concrete laminated slab with qualified production quality to a product storage area for storage.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above are the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: equivalent changes made according to the structure, shape and principle of the invention shall be covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a recycled aggregate concrete superimposed sheet which characterized in that: comprises a prefabricated recycled aggregate concrete layer (1) and a reinforcing mesh (2);
reinforcing bar net (2) are including a plurality of steel bar trusses (21), the vertical atress reinforcing bar (22) in a plurality of board bottoms and a plurality of board bottom transverse structure reinforcing bar (23), steel bar truss (21) are followed the even setting in width direction interval of prefabricated regeneration aggregate concrete layer (1) is in prefabricated regeneration aggregate concrete layer (1), the vertical atress reinforcing bar of bottom plate (22) is pre-buried inside of prefabricated regeneration aggregate concrete layer (1) to the parallel runs through the length direction of prefabricated regeneration aggregate concrete layer (1), two adjacent be equipped with one between steel bar truss (21) the vertical atress reinforcing bar of bottom plate (22), the horizontal structure reinforcing bar (23) in board bottom is pre-buried inside of prefabricated regeneration aggregate concrete layer (1), horizontal structure reinforcing bar (23) parallel runs through at board bottom the width direction of prefabricated regeneration aggregate concrete layer (1).
2. The recycled aggregate concrete composite slab as claimed in claim 1, wherein: the steel bar truss (21) comprises an upper chord rib (211), two lower chord ribs (212) and two wave-shaped web ribs (213), the two lower chord ribs (212) are embedded in the prefabricated recycled aggregate concrete layer (1) in parallel, the lower chord ribs (212) penetrate through the length direction of the prefabricated recycled aggregate concrete layer (1), the upper chord rib (211) is arranged above the prefabricated recycled aggregate concrete layer (1), the longitudinal sections of the upper chord rib (211) and the two lower chord ribs (212) form a triangle, and the two wave-shaped web ribs (213) are welded with the upper chord rib (211) and one of the lower chord ribs (212) at wave crests and wave troughs.
3. The recycled aggregate concrete composite slab as claimed in claim 1, wherein: the distance between two adjacent steel bar trusses (21) is 500-600mm.
4. A production process of a recycled aggregate concrete laminated slab is characterized by comprising the following steps: the method comprises the following steps:
arranging and binding steel bars, processing the steel bars, and placing, binding and fixing the processed steel bars according to the specification interval required by the construction drawing;
preparing concrete raw materials, preparing cement, common aggregate, recycled aggregate, an additive and clear water according to a production plan, checking the delivery certification and quality qualification certificate of the raw materials, performing quality sampling inspection, and transporting the raw materials to a concrete production area after the inspection is correct;
preparing recycled aggregate concrete, namely preparing the recycled aggregate concrete according to a well-determined mixing ratio by a test, wherein the mixing ratio of the recycled aggregate concrete is determined by the test according to the strength grade of the concrete, the air temperature, the source of the recycled aggregate and the mixing ratio;
pouring the recycled bone concrete, and pouring the recycled aggregate concrete composite slab after the steel bars are bound without errors, wherein the pouring of the concrete is continuously carried out, and if the concrete is required to be intermittently poured, the intermittent time is required to finish the pouring of the secondary layer of concrete before the primary setting of the recycled aggregate concrete of the front layer;
vibrating the recycled bone concrete, and fully vibrating the prefabricated aggregate concrete laminated slab by using a vibrating table;
and (3) concrete surface curing, covering the recycled aggregate concrete laminated slab with plastic cloth after the recycled aggregate concrete laminated slab is poured, and adopting watering curing to ensure that the surface of the recycled aggregate concrete laminated slab is always in a wet state and the watering curing time is not less than 20 days after the recycled aggregate concrete laminated slab reaches final setting.
5. The production process of the recycled aggregate concrete composite slab as claimed in claim 4, wherein the production process comprises the following steps: before the step of arranging and binding the reinforcing steel bars, the method also comprises the following steps:
and installing the die.
6. The production process of the recycled aggregate concrete composite slab as claimed in claim 5, wherein the production process comprises the following steps: the step of installing the mold specifically comprises:
cleaning a mould, cleaning the mould assembly and cleaning concrete residues on the surface and the holes of the mould assembly, wherein the mould assembly comprises a bottom mould, a side mould and a connecting piece;
inspecting the repaired mould, inspecting the appearance quality of the mould, repairing the defect position, and replacing a new mould in time when the mould cannot be repaired;
installing a mould accessory, installing and fixing the side mould, and paving a cushion block on the bottom mould;
and (3) coating mold oil, wherein the surface of the assembled mold assembly is coated with the oil, and the contact surfaces of the bottom mold and the side mold and the recycled aggregate concrete are coated with the oil.
7. The production process of the recycled aggregate concrete composite slab as claimed in claim 4, wherein the production process comprises the following steps: the step of processing the reinforcing steel bar specifically comprises the following steps:
preparing a steel bar material, namely preparing the steel bar material according to a production plan, extracting a steel bar test according to the specification to carry out steel bar mechanical performance test, and transporting the steel bar material to a steel bar processing area after all tests are qualified;
processing a steel bar material, straightening the steel bar by using mechanical equipment, hooking the end of the stressed steel bar, wherein the bending inner diameter of the hook is not less than 4 times of the diameter of the steel bar, and configuring a label on the processed steel bar and marking.
8. The production process of the recycled aggregate concrete composite slab as claimed in claim 5, wherein the production process comprises the following steps: after the concrete surface curing step, the method further comprises the following steps:
and demolding the recycled aggregate concrete laminated slab.
9. The production process of the recycled aggregate concrete composite slab as claimed in claim 8, wherein the production process comprises the following steps: the step of demoulding the recycled aggregate concrete laminated slab specifically comprises the following steps:
carrying out quality inspection on the recycled aggregate concrete laminated slab, inspecting whether the surface of the recycled aggregate concrete laminated slab has cracks, insufficient depth of brush hair on the rough surface and the defects of bending damage of reinforcing steel bars, and measuring whether the size of the recycled aggregate concrete laminated slab has large errors;
and repairing the recycled aggregate concrete laminated slab, repairing the defects of the recycled aggregate concrete laminated slab, and treating the unrepairable waste parts.
10. The recycled aggregate concrete composite slab production process according to claim 9, wherein the recycled aggregate concrete composite slab comprises the following steps: after the member demolding step, further comprising:
and (4) transferring and storing, namely transferring the recycled aggregate concrete laminated slab with qualified production quality to a product storage area for storage.
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