A plate side recess connected hybrid fiber concrete composite floor slab and building structure

Abstract

The application discloses a plate-side recess connection hybrid fiber concrete composite floor and a building structure, and belongs to the building field. The composite floor comprises a floor body; the floor body extends along a first direction; the floor body has opposite first and second ends along the first direction; the surface of the floor body is provided with a recess; the recess is located at the first end of the floor body and / or the second end of the floor body; a first connecting rib is arranged in the recess; and the first connecting rib is used for connecting a concrete beam.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of building, and particularly relates to a mixed fiber concrete composite floor slab connected by side recesses and a building structure. BACKGROUND

[0002] With the development of building industrialization, the composite slab component is widely used in prefabricated assembly buildings due to stable stress performance, convenient construction and energy saving and environmental protection. The composite slab is an important horizontal stress component in the assembly structure. Compared with the prefabricated slab layer, the composite slab has good integrity and superior seismic performance; compared with the cast-in-place slab, the composite slab can save building materials, shorten the construction period and be green and environmentally friendly.

[0003] In the related art, the bottom plate of the commonly used composite slab is a prefabricated slab layer with protruding steel bars. When the prefabricated slab layer is connected with the concrete beam, the protruding steel bars of the prefabricated slab layer are easy to collide with the steel bars of the concrete beam. The steel bars need to be avoided and inserted in place, which is difficult to handle and has low construction efficiency. SUMMARY

[0004] The purpose of the embodiments of the application is to provide a mixed fiber concrete composite floor slab connected by side recesses and a building structure, which at least solves the problem that when the prefabricated slab layer is connected with the concrete beam, the protruding steel bars of the prefabricated slab layer are easy to collide with the steel bars of the concrete beam. The steel bars need to be avoided and inserted in place, which is difficult to handle and has low construction efficiency.

[0005] In a first aspect, the embodiments of the application provide a mixed fiber concrete composite floor slab connected by side recesses, which comprises: a floor body.

[0006] The floor body extends along a first direction, the floor body has opposite first and second ends along the first direction, the surface of the floor body is provided with a recess, and the recess is located at the first end of the floor body and / or the second end of the floor body. A first connecting bar is arranged in the recess, and the first connecting bar is used to connect a concrete beam.

[0007] Optionally, the number of recesses is multiple, and the multiple recesses are distributed in a second direction, and the second direction is perpendicular to the first direction.

[0008] Optionally, the recess penetrates the side surface of the floor body in the first direction, and the groove wall of the recess is inclined relative to the surface of the floor body. The projection of the groove bottom of the recess in the thickness direction of the floor body is located inside the projection of the groove opening of the recess in the thickness direction of the floor body.

[0009] Optionally, the floor body comprises a cast-in-place concrete layer and a prefabricated slab layer arranged in layers.

[0010] The cast-in-place concrete layer is provided with a first groove, and the prefabricated slab layer is provided with a second groove, the first groove penetrates through the cast-in-place concrete layer, and the first groove and the second groove form the groove.

[0011] Optionally, the prefabricated slab layer comprises steel fiber-polyvinyl alcohol hybrid fiber concrete, or basalt-polyvinyl alcohol hybrid fiber concrete.

[0012] The steel fiber-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, water reducing agent, quartz sand, steel fiber, and polyvinyl alcohol, wherein the amount of the cement ranges from 360 kg / m³ to 500 kg / m³, the mass fraction of the silica fume ranges from 5% to 10%, the mass fraction of the fly ash ranges from 10% to 30%, the mass fraction of the water reducing agent ranges from 2.0% to 2.5%, the mass fraction of the quartz sand ranges from 50% to 70%, the mass fraction of the steel fiber ranges from 0.4% to 1.5%, and the mass fraction of the polyvinyl alcohol ranges from 0.6% to 0.9%.

[0013] The basalt-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, river sand, water reducing agent, calcium carbonate whisker, basalt fiber, and polyvinyl alcohol, wherein the amount of the cement ranges from 380 kg / m³ to 500 kg / m³, the mass fraction of the silica fume ranges from 5% to 10%, the mass fraction of the fly ash ranges from 20% to 30%, the mass fraction of the water reducing agent ranges from 2.0% to 2.5%, the mass fraction of the river sand ranges from 50% to 70%, the mass fraction of the basalt fiber, the mass fraction of the calcium carbonate whisker, and the mass fraction of the polyvinyl alcohol all range from 0.6% to 0.9%.

[0014] Optionally, the groove is filled with filling concrete, and the filling concrete fills the groove.

[0015] In a second aspect, the embodiments of the present application provide a building structure, characterized in that the building structure comprises a concrete beam and the composite floor slab according to any one of the first aspect.

[0016] The composite floor slab is located on one side of the concrete beam, and the concrete beam is connected with the first connecting bar.

[0017] Optionally, the floor slab body comprises a cast-in-place concrete layer and a prefabricated slab layer arranged in layers.

[0018] The cast-in-place concrete layer is provided with a first groove, and the prefabricated slab layer is provided with a second groove, the first groove penetrates through the cast-in-place concrete layer, and the first groove and the second groove form the groove.

[0019] The first connecting rib includes a first rib arranged in the cast-in-place concrete, and part of the first rib extends into the first groove. The concrete beam is arranged with a second connecting rib, and the second connecting rib is connected with the first rib.

[0020] Optionally, the first connecting rib further includes a second rib arranged in the prefabricated slab layer, and part of the second rib extends into the second groove. The second connecting rib is connected with the second rib.

[0021] Optionally, one end of the second connecting rib is bent and anchored in the concrete beam, and the other end of the second connecting rib is tied with the second rib in the groove.

[0022] In a third aspect, the embodiments of the present application provide a building, which includes the composite floor slab of any one of the first aspect or the building structure of any one of the second aspect.

[0023] In the embodiments of the present application, since the surface of the floor body is arranged with the groove, and the groove is located at the first end of the floor body and / or the second end of the floor body, and the first connecting rib is arranged in the groove, when the floor body needs to be connected with the concrete beam, the floor body is arranged on one side of the concrete beam, and the first connecting rib is located in the groove, and the first connecting rib does not protrude out of the floor body, thereby effectively avoiding the problem that the protruding steel bars of the prefabricated slab layer easily collide with the steel bars of the concrete beam, and the steel bars need to be avoided, inserted and placed, which is difficult to handle. That is, in the embodiments of the present application, by arranging the groove on the surface of the floor body, and arranging the first connecting rib in the groove, when the floor body is connected with the concrete beam, the protruding steel bars of the prefabricated slab layer are effectively avoided from being aligned with the steel bars of the concrete beam, that is, the alignment process is omitted, and the protruding steel bars of the prefabricated slab layer are effectively avoided from easily colliding with the steel bars of the concrete beam, and the steel bars need to be avoided, inserted and placed, which is difficult to handle and has low construction efficiency. Therefore, the connection efficiency of the floor body and the concrete beam is effectively improved, and the construction efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 shows a side view of a floor body according to an embodiment of the present application;

[0025] Figure 2 FIG. 4 shows a schematic view of a prefabricated slab layer according to an embodiment of the present application;

[0026] Figure 3 FIG. 6 shows a schematic view of the connection between a floor body and a concrete beam according to an embodiment of the present application;

[0027] Figure 4Fig. 2 is a schematic view of a floor body and a concrete beam according to an embodiment of the present application;

[0028] Figure 5 Fig. 3 is a partial schematic view of a floor body and a concrete beam according to an embodiment of the present application;

[0029] Figure 6 Fig. 4 is a schematic view of a second connecting rib according to an embodiment of the present application;

[0030] Figure 7 Fig. 5 is a schematic view of a first shape rib according to an embodiment of the present application;

[0031] Figure 8 Fig. 6 is a schematic view of a second shape rib according to an embodiment of the present application.

[0032] Reference signs:

[0033] 10: floor body; 11: cast-in-place concrete layer; 12: prefabricated slab layer; 101: groove; 1011: first slot; 1012: second slot; 102: steel bar truss; 20: first connecting rib; 21: first rib; 22: second rib; 001: first shape rib; 002: second shape rib; 100: concrete beam; 110: second connecting rib; X: first direction; Y: second direction. DETAILED DESCRIPTION

[0034] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and 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 therefore cannot be understood as a limitation on the present application.

[0036] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] As shown in Figures 1 to 8 The plate side groove connected hybrid fiber concrete composite floor slab includes a floor body 10.

[0038] The floor body 10 extends along the first direction X, the floor body 10 has opposite first and second ends along the first direction X, the surface of the floor body 10 is provided with a groove 101, and the groove 101 is located at the first end of the floor body 10 and / or the second end of the floor body 10, and the first connecting bar 20 is arranged in the groove 101, and the first connecting bar 20 is used to connect the concrete beam 100.

[0039] In the embodiment of the present application, since the surface of the floor body 10 is provided with the groove 101, and the groove 101 is located at the first end of the floor body 10 and / or the second end of the floor body 10, and the first connecting bar 20 is arranged in the groove 101, when the floor body 10 needs to be connected with the concrete beam 100, the floor body 10 is arranged on one side of the concrete beam 100, and the first connecting bar 20 is located in the groove 101, and the first connecting bar 20 does not protrude out of the floor body 10, thereby effectively avoiding the problem that the protruding steel bars of the prefabricated slab layer easily collide with the steel bars of the concrete beam 100, and the steel bars need to be avoided, inserted and placed, which is difficult to handle. In the embodiment of the present application, by arranging the groove 101 on the surface of the floor body 10, and arranging the first connecting bar 20 in the groove 101, when the floor body 10 is connected with the concrete beam 100, the protruding steel bars of the prefabricated slab layer are effectively avoided from being aligned with the steel bars of the concrete beam 100, that is, the alignment process is avoided, and the protruding steel bars of the prefabricated slab layer are effectively avoided from colliding with the steel bars of the concrete beam 100, and the steel bars need to be avoided, inserted and placed, which is difficult to handle and has low construction efficiency. Therefore, the connection efficiency of the floor body 10 and the concrete beam 100 is effectively improved, and the construction efficiency is improved.

[0040] It should be noted that in the embodiment of the present application, the groove 101 can be arranged only at the first end of the floor body 10, or only at the second end of the floor body 10, or the groove 101 can be arranged at the first end of the floor body 10 and at the second end of the floor body 10. For this, the present application does not limit the embodiment.

[0041] In addition, the concrete beam 100 is usually provided with steel bars, and the steel bars of the concrete beam 100 are connected with the first connecting bars 20 in the grooves 101 when the floor body 10 is connected with the concrete beam 100.

[0042] In addition, in some embodiments, the number of the grooves 101 is multiple, and the multiple grooves 101 are distributed along the second direction Y, and the second direction Y is perpendicular to the first direction X. Through such a setting, when the floor body 10 is connected with the concrete beam 100, the first connecting bars 20 in the multiple grooves 101 are all connected with the concrete beam 100, so that the connection between the floor body 10 and the concrete beam 100 is more firm.

[0043] It should be noted that the number of the grooves 101 is set according to actual needs, for example, the number of the grooves 101 is 4, for another example, the number of the grooves 101 is 5, and for another example, the number of the grooves 101 is 6. The specific number of the grooves 101 is not limited herein by the embodiments of the present application.

[0044] In addition, when the grooves 101 are distributed along the second direction Y, the spacing between the adjacent two grooves 101 is set according to actual needs, for example, the groove 101 center spacing between the adjacent two grooves 101 is 250 mm, and for another example, the groove 101 center spacing between the adjacent two grooves 101 is 300 mm. The embodiments of the present application do not limit this herein.

[0045] In addition, in some embodiments, the groove 101 penetrates through the side of the floor body 10 in the first direction X, and the groove wall of the groove 101 is inclined relative to the surface of the floor body 10, and the projection of the groove bottom of the groove 101 in the thickness direction of the floor body 10 is located inside the projection of the groove opening of the groove 101 in the thickness direction of the floor body 10.

[0046] Since the groove 101 penetrates through the side of the floor body 10 in the first direction X, when the floor body 10 is connected with the concrete beam 100, the steel bars of the concrete beam 100 are convenient to extend into the groove 101 to be connected with the first connecting bars 20 in the groove 101, so that the connection between the concrete beam 100 and the floor body 10 is facilitated. In addition, the groove wall of the groove 101 is inclined relative to the surface of the floor body 10, and the projection of the groove bottom of the groove 101 in the thickness direction of the floor body 10 is located inside the projection of the groove opening of the groove 101 in the thickness direction of the floor body 10, which is equivalent to that the size of the groove opening of the groove 101 is greater than the size of the groove bottom of the groove 101, and the inclination of the groove wall makes the tensile strength between the filling and the floor body 10 in the groove 101 be improved, and the interface bonding is ensured to be sufficient.

[0047] It should be noted that the groove 101 has a groove bottom and a plurality of groove walls, the groove bottom of the groove 101 is parallel to the surface of the floor body 10, the surface of the floor body 10 is the surface of the floor body 10 in the thickness direction thereof, and the groove walls of the groove 101 are inclined relative to the surface of the floor body 10. Specifically, each groove wall of the groove 101 is inclined relative to the surface of the floor body 10, and the included angle between the groove wall and the surface of the floor body 10 can be set according to actual needs. For example, the included angle between the groove wall and the surface of the floor body 10 is 45°, and for another example, the included angle between the groove wall and the surface of the floor body 10 is 60°. The specific value of the included angle between the groove wall and the surface of the floor body 10 is not limited in the embodiment of the present application. The surface of the floor body 10 is the surface of the floor body 10 in the thickness direction thereof.

[0048] In addition, in the embodiment of the present application, when the first end and the second end of the floor body 10 are both provided with the groove 101, the floor body 10 has opposite first and second side surfaces in the first direction X, the first side surface is located at the first end, and the second side surface is located at the second end. The groove 101 at the first end penetrates the first side surface in the first direction X, and the groove 101 at the second end penetrates the second side surface in the first direction X.

[0049] In addition, in the embodiment of the present application, the floor body 10 includes a cast-in-place concrete layer 11 and a prefabricated slab layer 12 arranged in layers; the first groove 1011 is arranged on the cast-in-place concrete layer 11, and the second groove 1012 is arranged on the prefabricated slab layer 12. The first groove 1011 penetrates the cast-in-place concrete layer 11, and the first groove 1011 and the second groove 1012 form the groove 101.

[0050] In the process of forming the groove 101 on the floor body 10, the second groove 1012 is first formed on the prefabricated slab layer 12, then the cast-in-place concrete layer 11 is made on the prefabricated slab layer 12, the baffle is arranged in the second groove 1012, then the cast-in-place concrete layer 11 is formed, and the baffle is removed to form the first groove 1011 on the cast-in-place concrete layer 11, and the first groove 1011 and the second groove 1012 are in communication.

[0051] In addition, in the embodiment of the present application, the groove bottom of the second groove 1012 is the groove bottom of the groove 101, and the inclination of the groove wall of the second groove 1012 is the inclination of the groove wall of the groove 101.

[0052] In addition, in the embodiment of the present application, the prefabricated slab layer 12 comprises steel fiber-polyvinyl alcohol hybrid fiber concrete or basalt-polyvinyl alcohol hybrid fiber concrete; the steel fiber-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, water reducing agent, quartz sand, steel fiber and polyvinyl alcohol, wherein the amount of cement ranges from 360 kg / m³ to 500 kg / m³, the mass fraction of silica fume ranges from 5% to 10%, the mass fraction of fly ash ranges from 10% to 30%, the mass fraction of water reducing agent ranges from 2.0% to 2.5%, the mass fraction of quartz sand ranges from 50% to 70%, the mass fraction of steel fiber ranges from 0.4% to 1.5%, and the mass fraction of polyvinyl alcohol ranges from 0.6% to 0.9%; the basalt-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, river sand, water reducing agent, calcium carbonate whisker, basalt fiber and polyvinyl alcohol, wherein the amount of cement ranges from 380 kg / m³ to 500 kg / m³, the mass fraction of silica fume ranges from 5% to 10%, the mass fraction of fly ash ranges from 20% to 30%, the mass fraction of water reducing agent ranges from 2.0% to 2.5%, the mass fraction of river sand ranges from 50% to 70%, and the mass fraction of basalt fiber, the mass fraction of calcium carbonate whisker and the mass fraction of polyvinyl alcohol all range from 0.6% to 0.9%.

[0053] When the prefabricated slab layer 12 comprises basalt-polyvinyl alcohol hybrid fiber concrete, not only can the self-weight of the floor body 10 be reduced, the expansion of cracks be inhibited, the ductility, bearing capacity and seismic performance of the floor body 10 be improved, but also the maintenance cost of the floor body 10 can be reduced, the carbonation resistance and durability of the floor body 10 can be improved, thereby effectively enhancing the service life and durability of the composite floor slab in complex environments.

[0054] In addition, in the embodiment of the present application, the basalt-polyvinyl alcohol hybrid fiber concrete has the advantage that the calcium carbonate whisker can be used as a short-cut fiber to reduce the amount of polyvinyl alcohol, thereby reducing the cost without reducing the strength. In the embodiment of the present application, the steel fiber-polyvinyl alcohol hybrid fiber concrete has the advantage that the polyvinyl alcohol is mixed to realize high strength and high ductility of the concrete, and the microstructure has less porosity and higher density, so that the fibers are closely embedded in the cement matrix and randomly distributed to form a whole.

[0055] In addition, in the embodiment of the present application, both the basalt-polyvinyl alcohol hybrid fiber concrete and the steel fiber-polyvinyl alcohol hybrid fiber concrete have water reducing agent, thereby greatly improving the fluidity of the hybrid fiber concrete and the compact floor structure, and facilitating construction.

[0056] In addition, in the embodiment of the present application, the ratio of each material for the steel fiber-polyvinyl alcohol hybrid fiber concrete can be as follows:

[0057] Cement: Silica fume: Fly ash: Water: Water reducing agent: Quartz sand: Steel fiber: Polyvinyl alcohol = 1:0.14:0.29:0.29:0.04:1.53:0.11:0.04.

[0058] For basalt-polyvinyl alcohol hybrid fiber concrete, the ratio of each material can be as follows:

[0059] Cement: Silica fume: Fly ash: River sand: Water: Water reducing agent: Calcium carbonate whisker: Basalt fiber: PVA = 1:0.09:0.36:0.66:0.43:0.04:0.024:0.025:0.011.

[0060] In addition, in the embodiment of the present application, the prefabricated plate layer 12 contains silica fume, which can improve the compactness and impermeability; the prefabricated plate layer 12 contains fly ash, which can improve the workability and reduce the hydration heat; the prefabricated plate layer 12 contains water reducing agent, which can compensate for the loss of flowability caused by fibers.

[0061] In addition, in the embodiment of the present application, for the prefabricated plate layer 12 formed by steel fiber, the sand rate of quartz sand in the prefabricated plate layer 12 is preferably 50%-70%, and for every increase of 0.3% (volume rate) of steel fiber content, the sand rate needs to be increased by 2% to wrap the fiber and improve the workability. The quartz sand should be medium-coarse sand (fineness modulus 2.6-3.0), with mud content ≤3%, and coarse aggregate particle size ≤20 mm; too large particle size will affect the dispersibility of the fiber. In addition, the length of the steel fiber is 30-60 mm, the diameter is 0.3-0.8 mm, and the tensile strength is ≥700 MPa; when the volume rate of steel fiber exceeds 0.8%, the stirring process needs to be adjusted to prevent clumping, and the content needs to be determined according to the requirements of crack resistance and impact resistance. In addition, polyvinyl alcohol fiber can inhibit the development of microcracks.

[0062] In addition, in the embodiment of the present application, for basalt-polyvinyl alcohol hybrid fiber concrete, the quartz sand in the prefabricated plate layer 12 includes coarse sand, micro-coarse sand, medium sand, micro-medium sand, fine sand and extra-fine sand, and the mass fractions of quartz sand of various sizes are as follows:

[0063] m 粗 = 348.87 kg·m -3 ; m 微粗 = 233.74 kg·m -3 ; m 中 = 195.37 kg·m -3 ; m 微中 = 129.08 kg·m -3 ; m 细 = 111.16 kg·m -3 ; m 特细 = 94.19 kg·m-3 .

[0064] Of course, in the embodiment of the present application, the prefabricated slab layer 12 can also comprise ordinary concrete, at which time, the prefabricated slab layer 12 is equivalent to being made of ordinary concrete, and the ordinary concrete does not contain hybrid fibers, i.e., does not contain steel fibers, polyvinyl alcohol, etc.

[0065] In addition, in the embodiment of the present application, the floor body 10 is also provided with a steel bar truss 102, which further improves the strength of the floor body 10. The steel bar truss 102 comprises an upper chord, a lower chord, and a wavy web, and the wavy web is located between the upper chord and the lower chord, and the upper chord and the lower chord are connected through the wavy web.

[0066] In the embodiment of the present application, the upper chord of the steel bar truss 102 is made of C15 steel bars, the lower chord is made of D15 steel bars, and the wavy web is made of A10 steel bars. In addition, the ordinary concrete is made of C40 concrete.

[0067] In addition, in some embodiments, the recess 101 is filled with filling concrete (not shown in the figure), and the filling concrete fills the recess 101. Through such a setting, the filling concrete covers the first connecting bars 20 in the recess 101, and when the floor body 10 is connected with the concrete beam 100, the steel bars of the concrete beam 100 are connected with the first connecting bars 20 in the recess 101, and then the recess 101 is filled with the filling concrete, so that the filling concrete will cover the first connecting bars 20 and the steel bars of the concrete beam 100, thereby making the connection between the floor body 10 and the concrete beam 100 more firm, and the filling concrete also improves the strength of the floor body 10.

[0068] It should be noted that when the groove wall of the recess 101 is inclined relative to the surface of the floor body 10, at this time, once the filling concrete is filled in the recess 101, the inclined groove wall of the recess 101 makes it difficult for the filling concrete to separate from the cast-in-place concrete layer 11 and the prefabricated slab layer 12, i.e., the inclined groove wall of the recess 101 optimizes the stress transmission angle, effectively reducing the risk of interface peeling.

[0069] In addition, in the embodiment of the present application, the material of the filling concrete is the same as that of the prefabricated slab layer 12, i.e., the material composition of the filling concrete is the same as that of the prefabricated slab layer 12, thereby effectively improving the strength of the floor body 10; of course, the material of the filling concrete is also the same as that of the cast-in-place concrete, i.e., the material composition of the filling concrete is the same as that of the cast-in-place concrete. For this, the embodiment of the present application does not make a limitation here.

[0070] The embodiment of the present application provides a building structure, which comprises a concrete beam 100 and a composite floor in any one of the above embodiments; the composite floor is located on one side of the concrete beam 100, and the concrete beam 100 is connected with the first connecting rib 20.

[0071] In addition, in some embodiments, the floor body 10 comprises a cast-in-place concrete layer 11 and a prefabricated plate layer 12 which are arranged in a stack; the cast-in-place concrete layer 11 is provided with a first groove 1011, the prefabricated plate layer 12 is provided with a second groove 1012, the first groove 1011 penetrates through the cast-in-place concrete layer 11, and the first groove 1011 and the second groove 1012 form a groove 101; the first connecting rib 20 comprises a first rib 21, the first rib 21 is arranged in the cast-in-place concrete, and part of the first rib 21 extends into the first groove 1011; the concrete beam 100 is provided with a second connecting rib 110, and the second connecting rib 110 is connected with the first rib 21.

[0072] In the embodiment of the present application, the first shape rib 001 and the second shape rib 002 are both A6 steel bars.

[0073] Of course, the first shape rib 001 is also other shape short ribs, for example, the first shape rib 001 is a C-shaped short rib. The specific shape of the first shape rib 001 is not limited in the embodiment of the present application.

[0074] In addition, in some embodiments, the first connecting rib 20 further comprises a second rib 22, the second rib 22 is arranged in the prefabricated plate layer 12, and part of the second rib 22 extends into the second groove 1012, and the second connecting rib 110 is connected with the second rib 22.

[0075] In the embodiment of the present application, the first shape rib 001 and the second shape rib 002 are both A6 steel bars.

[0076] In addition, in some embodiments, the first connecting rib 20 further comprises a second rib 22, the second rib 22 is arranged in the prefabricated plate layer 12, and part of the second rib 22 extends into the second groove 1012, and the second connecting rib 110 is connected with the second rib 22.

[0077] In addition, in the embodiment of the present application, the recess 101 is arranged on the floor body 10, and when the floor body 10 is connected with the concrete beam 100, the second connecting rib 110 is bound and connected with the first rib 21 through the D-shaped short rib, and the second connecting rib 110 is bound and connected with the second rib 22 through the bent rib, so that the three-dimensional force transmission path is formed through the recess 101 by the engagement effect, the shear bearing capacity is greatly improved compared with the traditional plane connection, the durability and reliability of the connection part of the prefabricated and cast-in-situ concrete structure are improved, which has important practical significance for prolonging the service life of the structure and improving the comprehensive performance of the structure.

[0078] The following describes the manufacturing of the floor body 10 provided in the embodiment of the present application:

[0079] When the prefabricated slab layer 12 of the floor body 10 is ordinary concrete, when the prefabricated slab layer 12 of the floor body 10 is manufactured, first, the support mold is arranged, and the recess 101 mold is arranged every 100 mm; after the mold support is completed, the mold is cleaned and the water-based release agent is brushed on the inner surface of the mold to ensure that the surface of the bottom plate is flat and not sticky after the mold is removed. Then, the second rib 22 is bound with the steel bar truss 102 and the first rib 21, after the binding is completed, ordinary concrete is poured, and the plane vibration is used, and the surface is twice finished; after curing for 7 days, the mold is lifted and removed, at this time, the cubic compressive strength of the concrete of the prefabricated slab layer 12 should reach 75% of the standard value, and should not be less than 15 N / mm 2 ; After the strength acceptance is qualified, the rough processing is performed in the prefabricated processing factory to form the prefabricated slab layer.

[0080] The following describes the process of connecting the concrete beam 100 with the floor body 10 provided in the embodiment of the present application:

[0081] First, the prefabricated slab layer 12 is cleaned, hoisted to the specified position, the second connecting rib 110 is bent and anchored into the concrete beam 100, and the other end of the second connecting rib 110 is bound with the second rib 22 in the recess 101; then the bent rib and the D-shaped short rib are respectively placed at the two ends of the bound length of the second connecting rib 110 and the first rib 21 to constrain, and the binding treatment is performed, so that the concrete beam 100 is fully connected with the floor body 10, and the overall stress performance is improved; after the binding is completed, the surface of the recess 101 is cleaned, the steel fiber-polyvinyl alcohol hybrid fiber concrete is filled in the recess 101 after the mold is supported; after curing for one day, the mold is removed, and the position of the concrete beam 100, the position of the cast-in-situ concrete layer 11, and the position of the recess 101 are cast-in-situ concrete, and before pouring, the surface dust of the prefabricated slab layer 12 is washed and fully wetted to ensure that the concrete of the recess 101 and the top plate interface is fully bonded, and the integrity is improved.

[0082] It should be noted that the second connecting rib 110 is made of C10 steel, and the part of the second connecting rib 110 extending into the concrete beam 100 is bent at an angle of 45°, which is a diagonal steel bar, and effectively inhibits the expansion of the beam cracks.

[0083] The embodiment of the present application provides a building, which comprises the composite floor slab in any one of the above embodiments, or the building structure in any one of the above embodiments.

[0084] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A hybrid fiber reinforced concrete composite floor slab with slab side recessed groove connection, characterized by, The composite floor slab comprises a floor body; The floor body extends along a first direction, has opposite first and second ends along the first direction, and is provided with a groove on a surface thereof, the groove being located at the first end of the floor body and / or the second end of the floor body, and a first connecting bar being arranged in the groove and used for connecting a concrete beam; The floor body comprises a cast-in-situ concrete layer and a prefabricated slab layer arranged in layers; The cast-in-situ concrete layer is provided with a first slot, the prefabricated slab layer is provided with a second slot, the first slot penetrates through the cast-in-situ concrete layer, and the first slot and the second slot form the groove; the groove is filled with filling concrete, the filling concrete fills the groove; and the filling concrete has the same material as the prefabricated slab layer. The first connecting bar comprises a first bar and a second bar, the first bar is arranged in the cast-in-situ concrete layer, and part of the first bar extends into the first slot, and the second bar is arranged in the prefabricated slab layer, and part of the second bar extends into the second slot.

2. The composite floor slab of claim 1, wherein, The number of the grooves is multiple, and the multiple grooves are distributed at intervals along a second direction perpendicular to the first direction.

3. The composite floor slab of claim 1, wherein, The groove penetrates through a side surface of the floor body in the first direction, and a groove wall of the groove is inclined relative to the surface of the floor body, a projection of a groove bottom of the groove in a thickness direction of the floor body is located inside a projection of a groove opening of the groove in the thickness direction of the floor body.

4. The composite floor slab of claim 1, wherein, The prefabricated slab layer comprises steel fiber-polyvinyl alcohol hybrid fiber concrete or basalt-polyvinyl alcohol hybrid fiber concrete. The steel fiber-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, water reducing agent, quartz sand, steel fiber and polyvinyl alcohol, wherein the amount of the cement ranges from 360 kg / m³ to 500 kg / m³, the mass fraction of the silica fume ranges from 5% to 10%, the mass fraction of the fly ash ranges from 10% to 30%, the mass fraction of the water reducing agent ranges from 2.0% to 2.5%, the mass fraction of the quartz sand ranges from 50% to 70%, the mass fraction of the steel fiber ranges from 0.4% to 1.5%, and the mass fraction of the polyvinyl alcohol ranges from 0.6% to 0.9%. The basalt-polyvinyl alcohol hybrid fiber concrete comprises cement, silica fume, fly ash, river sand, water reducing agent, calcium carbonate whisker, basalt fiber and polyvinyl alcohol, wherein the amount of the cement ranges from 380 kg / m³ to 500 kg / m³, the mass fraction of the silica fume ranges from 5% to 10%, the mass fraction of the fly ash ranges from 20% to 30%, the mass fraction of the water reducing agent ranges from 2.0% to 2.5%, the mass fraction of the river sand ranges from 50% to 70%, the mass fraction of the basalt fiber, the mass fraction of the calcium carbonate whisker and the mass fraction of the polyvinyl alcohol all range from 0.6% to 0.9%.

5. A building structure, characterized by The building structure includes concrete beams and composite floor slabs as described in any one of claims 1-4; The composite floor slab is located on one side of the concrete beam, and the concrete beam is connected to the first connecting bar.

6. The building structure according to claim 5, wherein The floor slab body includes layers of cast-in-place concrete and precast slabs stacked together. A first groove is provided on the cast-in-place concrete layer, and a second groove is provided on the precast slab layer. The first groove penetrates the cast-in-place concrete layer, and the first groove and the second groove form the groove. The first connecting bar includes a first bar, which is disposed in the cast-in-place concrete, and a portion of the first bar extends into the first groove. The concrete beam is provided with a second connecting bar, which is connected to the first bar.

7. The building structure according to claim 6, wherein The first connecting rib also includes a second rib, which is disposed in the precast slab layer and a portion of the second rib extends into the second groove. The second connecting rib is connected to the second rib.

8. The building structure according to claim 7, wherein One end of the second connecting bar is bent and anchored in the concrete beam, and the other end of the second connecting bar is tied to the second bar in the groove.

Images