CN112726920A - Laminated plate - Google Patents
Laminated plate Download PDFInfo
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- CN112726920A CN112726920A CN202011551480.2A CN202011551480A CN112726920A CN 112726920 A CN112726920 A CN 112726920A CN 202011551480 A CN202011551480 A CN 202011551480A CN 112726920 A CN112726920 A CN 112726920A
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- Prior art keywords
- ribs
- support
- slab
- laminated slab
- steel
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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
- E04B5/17—Floor structures partly formed in situ
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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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
- 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
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention provides a laminated slab, which comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom rib, laminated slab ribs, reinforced long ribs, reinforced short ribs, a plurality of steel bar trusses and fixing ribs. According to the mass portion ratio, the ultra-high performance concrete comprises 65-75 parts of steel fiber, 120-139 parts of quartz sand and 185-237 parts of cement, wherein the surface of the steel fiber is provided with spiral protruding ribs, and the tensile strength is more than 3000 MPa. By adding the steel fiber with the spiral protruding ribs into the ultra-high performance concrete, the bonding degree of the composite slab with quartz sand and cement is effectively enhanced, and the stability of integral molding between the ultra-high performance concrete and the steel bar component is enhanced; in addition, the concrete structure with ultrahigh performance and the anti-seismic performance can be improved, so that the prepared laminated slab still has excellent tensile strength on the premise of no rib and thin thickness, and the service performance of the laminated slab is improved.
Description
Technical Field
The invention relates to constructional engineering, in particular to a laminated slab.
Background
The laminated slab is an assembled integral floor slab formed by laminating precast slabs and cast-in-place reinforced concrete layers, the precast slab is one of the structural components of the floor slab, and is also a permanent template of the cast-in-place reinforced concrete laminated layer, and the laminated slab has good integrity, has the advantage of saving templates and is widely used. At present, prefabricated composite slabs gradually move to the market, but molds need to be manufactured in the production process of the existing prefabricated composite slabs, and most of the composite slabs are provided with ribs on the periphery or on two sides, but the rib production of the composite slabs can cause that the design of the production molds can not be standardized in the production process, the production cost is increased, the production efficiency is influenced, large-scale industrialization can not be realized, and assembly line production can not be realized; the laminated plate goes out the muscle and still need carry out the trompil on producing the mould, the condition of leaking the thick liquid appears easily, influences the quality of production, also can influence its installation and use. In addition, the water cement ratio of the coarse aggregate to the concrete of the composite slab in the prior art is unreasonable, the shrinkage and the denaturation of the concrete are increased, the compressive strength of the prepared composite slab is poor, the thickness of the prepared composite slab is too large, and the composite slab has the problem of inconvenient transportation and installation.
In summary, there still remains a need in the art for a laminated board that addresses the above-mentioned problems.
Disclosure of Invention
Based on the above, in order to solve the problems that the laminated slab needs to form ribs, the ratio of coarse aggregate to concrete water cement is unreasonable, the shrinkage and the denaturation of concrete are increased, the prepared laminated slab has poor compressive strength, the thickness is too large, and the transportation and the installation are inconvenient, the invention provides the laminated slab, which has the following specific technical scheme:
a laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom bar, laminated slab gluten, a reinforced long bar, a reinforced short bar, a plurality of steel bar trusses and a fixed bar; the reinforced long ribs and the reinforced short ribs are arranged between the bottom ribs of the laminated slab and the gluten of the laminated slab; no ribs are arranged on the periphery of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete;
the ultrahigh-performance concrete comprises 65-75 parts by mass of steel fibers, 120-139 parts by mass of quartz sand and 237 parts by mass of cement, wherein spiral protruding ribs are arranged on the surfaces of the steel fibers, and the tensile strength of the steel fibers is more than 3000 MPa.
The steel fiber with the spiral protruding ribs is added into the ultra-high performance concrete, so that the bonding degree of the laminated slab with quartz sand and cement is effectively enhanced, and the stability of integral molding between the ultra-high performance concrete and a steel bar component is enhanced; in addition, the concrete structure and the anti-seismic performance of the ultra-high performance concrete structure can be improved, so that the prepared laminated slab still has excellent tensile strength under the conditions of no rib and thin thickness, and the service performance of the laminated slab is improved.
Further, strengthen long muscle, strengthen short muscle and fixed muscle parallel arrangement.
Furthermore, the bottom rib of the laminated slab consists of a plurality of bottom steel bars which are arranged in parallel.
Further, the superimposed sheet gluten comprises a plurality of parallel arrangement's upper portion reinforcing bar, and a plurality of upper portion reinforcing bar and a plurality of the mode one-to-one setting of parallel cloth muscle about the bottom reinforcing bar.
Further, the diameter of the bottom reinforcing steel bar is 8mm, and the bottom reinforcing steel bar is distributed at equal intervals.
Further, the diameter of the upper reinforcing steel bar is 8mm, and the upper reinforcing steel bar is distributed at equal intervals.
Furthermore, the thickness of the laminated plate is 12-17 mm.
Further, the steel bar truss comprises a first support, a second support, a third support and a fourth support, one end of the first support, one end of the second support, one end of the third support and one end of the fourth support are connected to the same point of the fixed rib, the other end of the first support and the other end of the second support are connected with the same reinforcing short rib respectively, the other end of the third support and the other end of the fourth support are connected with the other adjacent reinforcing short rib respectively, so that four triangular inclined planes are formed, and the surfaces of the first support, the second support, the third support and the fourth support all have the same thread structure.
Further, the first support, the second support, the third support and the fourth support are respectively welded and fixed with the reinforcing short rib.
Further, strengthen the long muscle with superimposed sheet gluten and superimposed sheet end muscle pass through the steel wire connection fixed.
Further, strengthen the short rib with the superimposed sheet gluten passes through the steel wire connection fixed.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic side view of a laminated board according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a schematic view of a portion of a laminated plate according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a steel bar truss of a composite slab according to an embodiment of the present invention;
FIG. 5 is a schematic view of a reinforcement assembly of a laminated slab according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a steel fiber structure of a composite slab according to an embodiment of the invention.
Description of reference numerals:
1-laminated slab bottom ribs; 2-laminated plate gluten; 3-reinforcing the long ribs; 4-reinforcing short ribs; 5-a steel bar truss; 51-a first support; 52-second support; 53-third support; 54-a fourth support; 6-fixing the ribs; 7-a thread structure; 8-steel fibers; 81-projecting ribs.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1 to 5, a laminated slab according to an embodiment of the present invention includes a concrete layer and a reinforcement assembly disposed in the concrete layer, where the reinforcement assembly includes a laminated slab bottom rib 1, a laminated slab rib 2, a reinforcing long rib 3, a reinforcing short rib 4, a plurality of reinforcement trusses 5, and a fixing rib 6; the reinforced long ribs 3 and the reinforced short ribs 4 are arranged between the bottom ribs 1 and the gluten 2 of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete;
the ultrahigh-performance concrete comprises, by mass, 65-75 parts of steel fibers, 120-139 parts of quartz sand and 185-237 parts of cement, spiral protruding ribs 81 are arranged on the surface of the steel fibers 8, and the tensile strength of the ultrahigh-performance concrete is more than 3000 MPa.
The steel fiber with the spiral protruding ribs is added into the ultra-high performance concrete, so that the bonding degree of the laminated slab with quartz sand and cement is effectively enhanced, and the stability of integral molding between the ultra-high performance concrete and a steel bar component is enhanced; in addition, the concrete structure with ultrahigh performance and the seismic performance can be improved, so that the prepared laminated slab still has excellent tensile strength, axial rigidity and bending resistance under the conditions of no rib and thin thickness, the probability of crack occurrence of the laminated slab is reduced, and the production safety is ensured. The prepared laminated plate does not have ribs, so that the production difficulty and the production cost are reduced; in addition, on the premise of ensuring the use requirement of the laminated slab, the prepared laminated slab has the advantage of being thin, and is convenient to produce and install.
In one embodiment, the protruding ribs 81 are obtained by cold drawing a hard metal drawing die.
In one embodiment, the cemented carbide is an aluminum-copper alloy, and the aluminum-copper alloy contains the following chemical components in percentage by mass: 0.5 percent of Cu0.05 percent of Ti0.05 percent of C, and the balance of aluminum and inevitable impurities.
In one embodiment, the steel fiber 8 is processed by the following steps: placing a steel raw material in a steel fiber 8 preparation device, setting the production size of the steel fiber 8, rotationally pulling a hard alloy on the steel fiber 8, and applying pressure to integrally form the hard alloy and the steel fiber 8 to obtain the steel fiber 8 with the protruding ribs 81.
In one embodiment, the steel fibres 8 have a length of 10mm to 50mm and a diameter of 0.12mm to 0.20 mm.
In one embodiment, the ultra-high performance concrete further comprises 150-160 parts of silica fume, 75-85 parts of slag powder and 10-20 parts of water reducing agent according to the mass part ratio.
In one embodiment, the preparation method of the ultra-high performance concrete comprises the following steps:
respectively adding cement, quartz sand, silica fume and slag powder into a stirrer, and uniformly stirring at a rotating speed of 2500-;
adding a water reducing agent into a certain amount of water, stirring uniformly, adjusting the pH to be neutral by using potassium hydroxide, adding the mixture into the mixture A, and continuously stirring for 5min-10min to obtain a mixture B;
uniformly scattering the steel fibers 8 into a stirrer, stirring at the rotating speed of 3000r/min for 20-60 min, and then adjusting the rotating speed of the stirrer to 400r/min at 250-.
In one embodiment, a method for manufacturing a laminated plate is also provided, which includes the following steps:
building the steel bar assembly in a laminated slab preparation mold;
pouring the ultra-high performance concrete into a laminated slab preparation mold, vibrating for 1-3 min, standing for 2-5 min, and vibrating for 30-90 s again;
covering a protective film after vibration, maintaining for 24-28 h, then removing the mold, heating to 75-85 ℃ at the heating rate of 10-15 ℃, keeping for 20-25 h, and cooling to room temperature at the cooling rate of 10-15 ℃ to obtain the laminated plate.
The preparation method of the laminated plate is simple, the requirement on the preparation mold of the laminated plate is low because no rib is produced, and the influence of rib production and the like is not needed in the vibrating operation, so that the problem of easy slurry leakage does not exist, and the laminated plate with good quality can be integrally prepared. In addition, the components in the ultra-high performance concrete are coordinated with each other and integrally formed with the steel bar assembly, so that the prepared laminated slab has the characteristic of being thin, the stress performance of the laminated slab is guaranteed, meanwhile, the laminated slab is convenient to transport, install and use, and the construction efficiency is further improved.
In one embodiment, the water reducing agent is a polycarboxylic acid high performance water reducing agent powder.
In one embodiment, the plywood gluten 2 comprises a plurality of parallel arrangement's upper portion reinforcing bar, and the plywood end muscle 1 comprises a plurality of parallel arrangement's low portion reinforcing bar, and a plurality of upper portion reinforcing bar and a plurality of the mode one-to-one setting of parallel cloth muscle about the bottom reinforcing bar.
In one embodiment, the long reinforcing rib 3, the short reinforcing rib 4 and the fixing rib 6 are arranged in parallel. In one embodiment, the diameter of each of the long reinforcing ribs 3 and the short reinforcing ribs 4 is 8 mm.
In one embodiment, the bottom steel bars have a diameter of 8mm and are distributed at equal intervals.
In one embodiment, the upper reinforcing bars have a diameter of 8mm and are distributed at equal intervals.
In one embodiment, the length of the reinforcing long rib 3 is greater than that of the reinforcing short rib 4.
In one embodiment, every two adjacent short reinforcing ribs 4 are arranged between every two adjacent long reinforcing ribs 3, and a plurality of steel bar trusses 5 are arranged on every two adjacent short reinforcing ribs 4.
In one embodiment, a plurality of reinforcing long ribs 3 and a plurality of reinforcing short ribs 4 are arranged in the laminated slab; every two are adjacent strengthen the last edge of short rib 4 strengthen the length direction of short rib 4 and set up a plurality of steel bar truss 5, and along with strengthening the setting of short rib 4 in the superimposed sheet for parallel interval has in the superimposed sheet and sets up the multiunit steel bar truss 5 to this increases the holistic steadiness of superimposed sheet, and the atress is more even.
In one embodiment, the thickness of the laminated plate is 12-17 mm; preferably, the thickness of the laminated plate is 15 mm.
In one embodiment, the steel bar truss 5 includes a first support 51, a second support 52, a third support 53 and a fourth support 54, one end of the first support 51, one end of the second support 52, one end of the third support 53 and one end of the fourth support 54 are connected to the same point of the fixing rib 6, the other end of the first support 51 and the other end of the second support 52 are respectively connected to the same reinforcing short rib 4, the other end of the third support 53 and the other end of the fourth support 54 are respectively connected to another adjacent reinforcing short rib 4, so that four triangular slopes are formed, and the surfaces of the first support 51, the second support 52, the third support 53 and the fourth support 54 all have the same thread structure 7. The setting has a plurality of steel bar trusses 5 on four triangle-shaped inclined planes for the reinforcing bar subassembly atress is stable, guarantees superimposed sheet's atress requirement, and each bearing surface of steel bar truss 5 has a helicitic texture, and when with concrete integrated into one piece, increases the steadiness between reinforcing bar subassembly and the concrete layer.
In one embodiment, the first support 51, the second support 52, the third support 53 and the fourth support 54 are respectively welded and fixed to the short reinforcing rib 4.
In one embodiment, the reinforcing long ribs 3 are connected and fixed with the laminated plate gluten 2 and the laminated plate bottom rib 1 through steel wires. In another embodiment, the reinforcement bar 3 is fixed to the laminated plate gluten 2 by welding.
In one embodiment, the short reinforcing ribs 4 are fixedly connected with the laminated plate gluten 2 through steel wires. In another embodiment, the reinforcement short ribs 4 are fixed to the laminated plate gluten 2 by welding. In one embodiment, the two ends of the long reinforcing rib 3 are aligned with the bottom reinforcing bars on the two sides of the composite slab, so that the composite slab prepared has no rib in the length direction of the long reinforcing rib 3.
In one embodiment, two ends of the upper reinforcing steel bar are aligned with two ends of the bottom reinforcing steel bar, so that the prepared laminated slab has no ribs in the length direction of the upper reinforcing steel bar, namely no ribs are arranged around the prepared laminated slab.
Application test example 1:
a laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom bar 1, a laminated slab gluten 2, a reinforced long bar 3, a reinforced short bar 4, a plurality of steel bar trusses 5 and a fixed bar 6; the reinforced long ribs 3 and the reinforced short ribs 4 are arranged between the bottom ribs 1 and the gluten 2 of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete; the ultrahigh-performance concrete comprises 65 parts of steel fibers, 120 parts of quartz sand, 185 parts of cement, 150 parts of silica fume, 85 parts of slag powder and 10 parts of polycarboxylic acid high-performance water reducing agent powder according to the mass parts, spiral protruding ribs 81 are arranged on the surface of the steel fibers 8, and the tensile strength reaches more than 3000 MPa.
The preparation method of the laminated plate comprises the following steps:
placing a steel raw material in a steel fiber 8 preparation device, setting the production size of the steel fiber 8, rotationally pulling a hard alloy on the steel fiber 8, and applying pressure to integrally form the hard alloy and the steel fiber 8 to obtain the steel fiber 8 with protruding ribs 81; the length of the prepared steel fiber 8 is 10mm, and the diameter is 0.12 mm;
respectively adding cement, quartz sand, silica fume and slag powder into a stirrer, and uniformly stirring at a rotating speed of 2500r/min to obtain a mixture A;
adding polycarboxylic acid high-performance water reducing agent powder into a certain amount of water, uniformly stirring, adjusting the pH to be neutral by using potassium hydroxide, adding the mixture into the mixture A, and continuously stirring for 10min to obtain a mixture B;
uniformly scattering the steel fibers 8 into a stirrer, stirring for 60min at a rotating speed of 3000r/min, and adjusting the rotating speed of the stirrer to 00r/min to obtain the ultra-high performance concrete for later use;
building the steel bar assembly in a laminated slab preparation mold;
pouring the ultra-high performance concrete into a laminated slab preparation mold, vibrating for 3min, standing for 5min, and vibrating again for 90 s;
and covering a protective film after vibration, maintaining for 28h, then removing the mold, heating to 85 ℃ at the temperature rising rate of 15 ℃, keeping for 25h, and then cooling to room temperature at the temperature falling rate of 15 ℃ to obtain the laminated plate.
Application test example 2:
a laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom bar 1, a laminated slab gluten 2, a reinforced long bar 3, a reinforced short bar 4, a plurality of steel bar trusses 5 and a fixed bar 6; the reinforced long ribs 3 and the reinforced short ribs 4 are arranged between the bottom ribs 1 and the gluten 2 of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete; the diameters of the long reinforcing ribs 3 and the short reinforcing ribs 4 are both 8 mm; according to the mass portion ratio, the ultra-high performance concrete comprises 75 portions of steel fiber, 139 portions of quartz sand, 237 portions of cement, 160 portions of silica fume, 75 portions of slag powder and 10 portions of polycarboxylic acid high performance water reducing agent powder, wherein the surface of the steel fiber 8 is provided with spiral protruding ribs 81, and the tensile strength reaches more than 3000 MPa.
The preparation method of the laminated plate comprises the following steps:
placing a steel raw material in a steel fiber 8 preparation device, setting the production size of the steel fiber 8, rotationally pulling a hard alloy on the steel fiber 8, applying pressure to integrally form the hard alloy and the steel fiber 8 to obtain the steel fiber 8 with the protruding ribs 81, wherein the prepared steel fiber 8 has the length of 50mm and the diameter of 0.20 mm;
respectively adding cement, quartz sand, silica fume and slag powder into a stirrer, and uniformly stirring at a rotating speed of 3500r/min to obtain a mixture A;
adding polycarboxylic acid high-performance water reducing agent powder into a certain amount of water, uniformly stirring, adjusting the pH to be neutral by using potassium hydroxide, adding the mixture into the mixture A, and continuously stirring for 10min to obtain a mixture B;
uniformly scattering the steel fibers 8 into a stirrer, stirring for 60min at a rotating speed of 3000r/min, and adjusting the rotating speed of the stirrer to 400r/min to obtain the ultra-high performance concrete for later use;
building the steel bar assembly in a laminated slab preparation mold;
pouring the ultra-high performance concrete into a laminated slab preparation mold, vibrating for 3min, standing for 5min, and vibrating again for 90 s;
and covering a protective film after vibration, maintaining for 28h, then removing the mold, heating to 85 ℃ at the temperature rising rate of 15 ℃, keeping for 25h, and then cooling to room temperature at the temperature falling rate of 15 ℃ to obtain the laminated plate.
Application test example 3:
a laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom bar 1, a laminated slab gluten 2, a reinforced long bar 3, a reinforced short bar 4, a plurality of steel bar trusses 5 and a fixed bar 6; the reinforced long ribs 3 and the reinforced short ribs 4 are arranged between the bottom ribs 1 and the gluten 2 of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete; the ultrahigh-performance concrete comprises, by mass, 70 parts of steel fibers, 125 parts of quartz sand, 220 parts of cement, 155 parts of silica fume, 80 parts of slag powder and 15 parts of polycarboxylic acid high-performance water reducing agent powder, wherein spiral protruding ribs 81 are arranged on the surface of the steel fibers 8, and the tensile strength of the steel fibers is more than 3000 MPa.
The preparation method of the laminated plate comprises the following steps:
placing a steel raw material in a steel fiber 8 preparation device, setting the production size of the steel fiber 8, rotationally pulling a hard alloy on the steel fiber 8, and applying pressure to integrally form the hard alloy and the steel fiber 8 to obtain the steel fiber 8 with the protruding ribs 81, wherein the prepared steel fiber 8 has the length of 30mm and the diameter of 0.18 mm;
respectively adding cement, quartz sand, silica fume and slag powder into a stirrer, and uniformly stirring at a rotating speed of 3000r/min to obtain a mixture A;
adding polycarboxylic acid high-performance water reducing agent powder into a certain amount of water, uniformly stirring, adjusting the pH to be neutral by using potassium hydroxide, adding the mixture into the mixture A, and continuously stirring for 8min to obtain a mixture B;
uniformly scattering the steel fibers 8 into a stirrer, stirring at the rotating speed of 2500r/min for 40min, and adjusting the rotating speed of the stirrer to 300r/min to obtain the ultra-high performance concrete for later use;
building the steel bar assembly in a laminated slab preparation mold;
pouring the ultra-high performance concrete into a laminated slab preparation mold, vibrating for 2min, standing for 3min, and vibrating again for 60 s;
and covering a protective film after vibration, maintaining for 25h, then removing the mold, heating to 80 ℃ at the heating rate of 12 ℃, keeping for 22h, and cooling to room temperature at the cooling rate of 12 ℃ to obtain the laminated plate.
Application comparative example 1:
a laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom bar 1, a laminated slab gluten 2, a reinforced long bar 3, a reinforced short bar 4, a plurality of steel bar trusses 5 and a fixed bar 6; the reinforced long ribs 3 and the reinforced short ribs 4 are arranged between the bottom ribs 1 and the gluten 2 of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete; the ultrahigh-performance concrete comprises, by mass, 125 parts of quartz sand, 220 parts of cement, 155 parts of silica fume, 80 parts of slag powder and 15 parts of polycarboxylic acid high-performance water reducing agent powder.
The preparation method of the laminated plate comprises the following steps:
respectively adding cement, quartz sand, silica fume and slag powder into a stirrer, and uniformly stirring at a rotating speed of 3000r/min to obtain a mixture A;
adding polycarboxylic acid high-performance water reducing agent powder into a certain amount of water, uniformly stirring, adjusting the pH to be neutral by using potassium hydroxide, adding the mixture into the mixture A, and continuously stirring for 8min to obtain concrete for later use;
building the steel bar assembly in a laminated slab preparation mold;
pouring the concrete into a laminated slab preparation mold, vibrating for 2min, standing for 3min, and vibrating again for 60 s;
and covering a protective film after vibration, maintaining for 25h, then removing the mold, heating to 80 ℃ at the heating rate of 12 ℃, keeping for 22h, and cooling to room temperature at the cooling rate of 12 ℃ to obtain the laminated plate.
Comparative application example 2:
a laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, wherein the steel bar assembly comprises a laminated slab bottom bar 1, a laminated slab gluten 2, a reinforced long bar 3, a reinforced short bar 4, a plurality of steel bar trusses 5 and a fixed bar 6; the reinforced long ribs 3 and the reinforced short ribs 4 are arranged between the bottom ribs 1 and the gluten 2 of the laminated slab; the concrete layer of the laminated slab is made of ultra-high performance concrete; the ultrahigh-performance concrete comprises, by mass, 70 parts of steel fibers, 125 parts of quartz sand, 220 parts of cement, 155 parts of silica fume, 80 parts of slag powder and 15 parts of polycarboxylic acid high-performance water reducing agent powder.
The preparation method of the laminated plate comprises the following steps:
placing a steel raw material in a steel fiber 8 preparation device, setting the production size of the steel fiber 8, wherein the length of the prepared steel fiber 8 is 30mm, and the diameter of the prepared steel fiber 8 is 0.18 mm;
respectively adding cement, quartz sand, silica fume and slag powder into a stirrer, and uniformly stirring at a rotating speed of 3000r/min to obtain a mixture A;
adding polycarboxylic acid high-performance water reducing agent powder into a certain amount of water, uniformly stirring, adjusting the pH to be neutral by using potassium hydroxide, adding the mixture into the mixture A, and continuously stirring for 8min to obtain a mixture B;
uniformly scattering the steel fibers 8 into a stirrer, stirring at the rotating speed of 2500r/min for 40min, and adjusting the rotating speed of the stirrer to 300r/min to obtain concrete for later use;
building the steel bar assembly in a laminated slab preparation mold;
pouring the ultra-high performance concrete into a laminated slab preparation mold, vibrating for 2min, standing for 3min, and vibrating again for 60 s;
and covering a protective film after vibration, maintaining for 25h, then removing the mold, heating to 80 ℃ at the heating rate of 12 ℃, keeping for 22h, and cooling to room temperature at the cooling rate of 12 ℃ to obtain the laminated plate.
Carrying out related performance detection on the laminated slab prepared in the application test examples 1-3, and simultaneously carrying out related performance detection on the laminated slab prepared in the application test examples 1-2 by detection and comparison, wherein the shock resistance is detected by a shock device simulation test; tensile strength, axial stiffness and bending resistance are detected by a cement board strength tester, and the data are compared, and the results are shown in the following table 1.
Table 1:
it should be noted that, in table 1, by comparing the composite slabs prepared in the application test examples with the composite slabs prepared in the comparative application test examples, it can be seen that, when the composite slabs having the same thickness are prepared, the composite slabs having the same thickness, which are different from the composite slabs prepared in the application test example 2 in terms of shock resistance, tensile strength, axial stiffness and bending resistance, are obtained because no steel fiber is added to the composite slab prepared in the comparative application test example 2; the steel fibers added in comparative application test example 2 did not have a protruding rib structure, resulting in the manufactured laminated slab having poorer shock resistance, tensile strength, axial rigidity, and bending resistance than the laminated slab manufactured in application test example 3. Therefore, the preparation of the ultra-high performance concrete is beneficial to improving the synergistic effect of the ultra-high performance concrete and the steel bar component under the condition that the laminated slab is relatively thin, and more excellent shock resistance, tensile strength, axial rigidity and bending resistance are obtained.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A laminated slab comprises a concrete layer and a steel bar assembly arranged in the concrete layer, and is characterized in that the steel bar assembly comprises a laminated slab bottom rib, laminated slab gluten, a reinforced long rib, a reinforced short rib, a plurality of steel bar trusses and a fixed rib; the reinforced long ribs and the reinforced short ribs are arranged between the bottom ribs of the laminated slab and the gluten of the laminated slab; no ribs are arranged on the periphery of the laminated slab; the concrete layer of the laminated slab comprises ultra-high performance concrete;
the ultrahigh-performance concrete comprises, by mass, 65-75 parts of steel fibers, 120-139 parts of quartz sand and 185-237 parts of cement, wherein spiral protruding ribs are arranged on the surfaces of the steel fibers, and the tensile strength of the concrete is more than 3000 MPa.
2. A composite panel according to claim 1 wherein said reinforcing long ribs, said reinforcing short ribs and said fixing ribs are arranged in parallel.
3. A composite slab as claimed in claim 1, wherein said bottom reinforcement comprises a plurality of parallel disposed bottom reinforcing bars.
4. A composite board as claimed in claim 1, wherein the composite board gluten is composed of a plurality of upper reinforcing bars arranged in parallel, and the plurality of upper reinforcing bars and the plurality of bottom reinforcing bars are arranged in a one-to-one correspondence manner in a manner of arranging the bars in parallel up and down.
5. A composite slab as claimed in claim 3, wherein said bottom reinforcing bars are 8mm in diameter and are equally spaced.
6. A composite slab as claimed in claim 4, wherein said upper reinforcing bars are 8mm in diameter and are equally spaced.
7. A composite slab as claimed in claim 1, wherein the steel bar truss includes a first support, a second support, a third support and a fourth support, and one end of the first support, one end of the second support, one end of the third support and one end of the fourth support are connected to the same point of the fixing rib, the other end of the first support and the other end of the second support are respectively connected to the same reinforcing short rib, and the other end of the third support and the other end of the fourth support are respectively connected to another adjacent reinforcing short rib, so that four triangular slopes are formed, and the surfaces of the first support, the second support, the third support and the fourth support all have the same thread structure.
8. A composite board according to claim 7 wherein said first brace, said second brace, said third brace and said fourth brace are each welded to said reinforcing short bar.
9. A composite slab as claimed in claim 8, wherein said reinforcing bars are fixed to said composite slab ribs and said composite slab bottom ribs by steel wire bonding.
10. A composite board according to claim 9 wherein the reinforcement studs are connected to the composite board ribs by steel wires.
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| CN202011551480.2A CN112726920A (en) | 2020-12-24 | 2020-12-24 | Laminated plate |
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| CN202011551480.2A CN112726920A (en) | 2020-12-24 | 2020-12-24 | Laminated plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974495A (en) * | 2023-01-17 | 2023-04-18 | 河北三海绿色建筑科技有限公司 | High-performance concrete for laminated slab, manufacturing method thereof and laminated slab |
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