CN116122491A - A lightweight prefabricated concrete composite wall panel and its preparation method and construction technology - Google Patents

Abstract

The invention discloses a lightweight precast concrete composite wallboard, a preparation method and a construction process thereof, wherein the composite wallboard comprises an inner reinforced concrete slab layer and an outer heat preservation concrete slab layer; the reinforced concrete slab layer is used as a wallboard bearing part, and a double-layer bidirectional reinforcing mesh is arranged in the reinforced concrete slab layer; the inside space wire net that adopts vertically and horizontally staggered steel wire truss to constitute of thermal insulation concrete slab layer, and space wire net and the outer reinforcing bar ligature of double-deck two-way reinforcing bar net are in the same place. The invention improves the strength of the composite wall body through the steel structure skeleton constructed by the double-layer bidirectional reinforcing steel bar net and the space steel wire net, and has good combination property between the reinforced concrete slab layer and the heat preservation concrete slab layer. The reinforced concrete plate is wrapped in the heat-insulating concrete plate, the reinforced concrete plate is little affected by external temperature change, the problem that sandwich wall boards crack under the action of temperature difference does not exist, and the preparation method is simpler and more convenient than sandwich wall boards.

Description

A lightweight prefabricated concrete composite wall panel and its preparation method and construction technology

technical field

The invention relates to the technical field of prefabricated shear wall structure systems, in particular to a lightweight prefabricated concrete composite wall panel and its preparation method and construction process.

Background technique

As an important part of the outer envelope structure, the outer wall plays a very important role in building energy saving. Regarding external wall insulation, traditional methods include internal insulation, external insulation and sandwich insulation. Inner insulation integrates the insulation board on the inner surface of the wall, which not only reduces the effective use area of the room, but is also easily damaged during decoration. It is very common to use organic thermal insulation materials (such as molded polystyrene board, extruded polystyrene board, polyurethane foam board, etc.) Problems such as shedding, poor fire performance, and easy formation of fire channels by external insulation in case of fire. Sandwich insulation wallboard is a new type of insulation wallboard that has been used more in recent years. It integrates the insulation board inside the wallboard to realize the integration of structural insulation. However, since the sandwich insulation wallboard adopts a layered pouring process, and in order to fix the insulation board, tie pieces are needed to connect the inner leaf board and the outer leaf board together, the construction process is complicated and the cost is high, so it is not suitable for promotion. At the same time, the anchors will form a natural thermal bridge, reducing the insulation effect of the wall panels. In addition, because the insulation board is located inside the wall, the temperature conditions of the inner and outer leaf wall boards are different, and the sandwich wall board also has the problem of cracking of the wall board under the action of temperature difference. Thereby, there is an urgent need for a novel structure-insulation-integrated composite wallboard.

Contents of the invention

The present invention provides a lightweight prefabricated concrete composite wallboard and its preparation method and construction technology to solve the problems existing in the thermal insulation wallboard in the above-mentioned background technology.

The technical solution adopted by the present invention is to provide a lightweight prefabricated concrete composite wall panel, which includes an inner reinforced concrete slab and an outer thermal insulation concrete slab; Two-layer two-way steel mesh; the interior of the thermal insulation concrete slab is a space steel mesh composed of criss-cross steel wire trusses, and the space steel mesh is bound together with the outer steel bars of the double-layer two-way steel mesh.

Further, the double-layer two-way steel mesh includes horizontally distributed steel bars and vertically stressed steel bars, and the horizontally distributed steel bars and vertically stressed steel bars are integrated into a whole through welding.

Further, the two sides of the reinforced concrete slab are provided with edge concealed columns, and the four vertical stressed steel bars in the edge concealed columns are replaced by a pair of edge reinforced steel bars, and the pair of edge reinforced steel bars are pulled The diameter of the edge reinforcing steel bar is not less than 12mm, the diameter of the tie bar is not less than 6mm, and the spacing is not greater than 150mm.

Further, the edge concealed column is provided with grooves and several horizontal steel wire rope sleeves along the vertical direction. After the horizontal steel wire rope sleeves in adjacent composite wall panels are stacked, they are inserted into vertical joints to connect steel bars, and then grouted to realize composite wall Reliable connection between the panel and the vertical joint of the composite wall panel.

Further, the composite wallboard includes a bottom composite wallboard, a middle layer composite wallboard, and a top layer composite wallboard, and the bottom side of the bottom layer composite wallboard and the middle layer composite wallboard are reserved with metal anchors for lap joint connection. The corrugated pipe is pre-embedded with horizontal seam connection reinforcement on the upper side to realize the horizontal seam grout anchor lap connection between the upper and lower adjacent layers of composite wallboards or between the bottom layer of composite wallboards and the foundation.

Further, the lower side of the reinforced concrete slab of the top composite wallboard is reserved with a metal bellows for the lap connection of the grout anchor, while the vertical stressed steel bar and the window hole connecting beam stirrup in the upper side of the reinforced concrete slab are Stretch out to connect with cast-in-place ring beams and cast-in-place slabs.

Further, the thickness of the reinforced concrete slab is not less than 140mm, and the concrete strength grade is not less than C30.

Further, the thermal insulation concrete slab layer adopts foam concrete, aerated concrete or airgel concrete.

The present invention also provides a method for preparing a lightweight prefabricated concrete composite wallboard. The composite wallboard is prefabricated in a factory and constructed by using a fixed mold table or a flowing water mold table, which specifically includes the following steps:

S1. Bind the double-layer two-way steel mesh of the reinforced concrete slab, and bind the space steel wire mesh of the thermal insulation concrete slab on it;

S2. Assemble the mold required for the wallboard on the mold table, and apply a release agent inside the mold;

S3. Place the bound double-layer two-way steel mesh and space steel wire mesh on the bottom mold of the wallboard, and evenly set pads under the double-layer two-way steel mesh;

S4. Bind the lifting point steel bar or threaded sleeve at the lifting point position, pre-embed metal bellows, horizontal seam connecting steel bars, horizontal steel wire rope sleeves and water and electricity pipelines;

S5. Pour the concrete of the reinforced concrete slab, pour it to the specified thickness, and use vibrating equipment to vibrate and compact it;

S6. Pouring the concrete for the thermal insulation concrete slab, pouring it to the specified thickness, and using vibrating equipment to vibrate and compact it;

S7. Put the wallboard under standard conditions or steam curing conditions for curing, demould after reaching the demoulding conditions, and then continue curing to the design strength.

The present invention also provides a lightweight prefabricated concrete composite wall panel construction process, including:

S1. Complete the construction of the foundation, where the horizontal joints are pre-embedded to connect the steel bars when the foundation steel bars are bound, and the surface of the foundation is roughened after pouring the foundation concrete, and the unevenness is not less than 4mm;

S2. Lay a 20mm thick mortar leveling layer on the foundation surface;

S3. Hoist the composite wall panel obtained according to the above preparation method to the specified height, and while slowly lowering the prefabricated composite wall panel, insert the foundation pre-embedded horizontal joint connection reinforcement into the pre-embedded metal bellows of the reinforced concrete slab, and finally place the prefabricated composite wall panel The wallboard is placed on the leveling layer of mortar that has not yet condensed, and after adjusting the position and verticality of the composite wallboard, set the outer support of the composite wallboard to fix the composite wallboard;

S4. Pour high-strength grouting material from the grouting port of the metal bellows;

S5. The composite wallboard of the same layer is installed in place according to the method of steps S3 and S4, and poured into high-strength grouting material;

S6. Stack the horizontal steel wire rope sleeves between adjacent composite wall panels, insert the vertical joints to connect the steel bars, nail the wooden boards outside the grooves of the vertical joints, and then use high-strength grouting material to pour from the upper part of the groove until the high-strength grouting material fills the adjacent cavities formed by wall panel grooves;

S7. pour the vertical joint between the composite wallboards of the same layer into the high-strength grouting material according to the method of step S5;

S8. Complete the construction of the floor;

S9. Complete the construction of other floors according to the method of steps S2-S8.

The beneficial effects of the present invention are:

1. In the present invention, the steel structure framework constructed by double-layer bidirectional steel mesh and space steel wire mesh improves the strength of the composite wall, and the combination between the reinforced concrete slab and the thermal insulation concrete slab is good.

2. The present invention adopts the reinforced concrete slab to be stressed, and the heat-preserving concrete slab realizes the heat preservation effect, and realizes the composite function of structural heat preservation integration. Lightweight thermal insulation concrete materials such as foam concrete, aerated concrete or airgel concrete are used as the insulation layer to reduce the weight of the wall panel and also have good waterproof, fireproof and durable performance, which has good economic benefits and is especially suitable for residential buildings in villages and towns. And low, multi-storey buildings used.

3. In the present invention, the reinforced concrete slab is wrapped in the thermal insulation concrete slab. The reinforced concrete slab is less affected by the external temperature change, and there is no cracking problem of the sandwich wallboard under the action of temperature difference, and the preparation method is simpler and more convenient than the sandwich wallboard. .

4. The vertical joints between the wall panels of the present invention are connected by grouting with horizontal steel wire rope sleeves, and the horizontal joints are connected by pre-embedded metal bellows grout anchor lap joints, which can achieve the same connection effect as cast-in-place. At the same time, the vertical joint connection avoids the traditional post-casting construction technology, the whole construction process is simple, and there are fewer wet operations on site, which greatly improves the construction speed.

Description of drawings

Figure 1a is a schematic diagram of the structural hierarchy of the lightweight precast concrete composite wall panel disclosed by the present invention;

Figure 1b is a cross-sectional view of the lightweight prefabricated concrete composite wall panel at the bottom of the pre-embedded metal bellows area disclosed by the present invention;

Fig. 1c is a sectional view of the lightweight prefabricated concrete composite wall panel disclosed in the present invention in the middle region;

Figure 1d is a cross-sectional view of the lightweight prefabricated concrete composite wall panel at the top pre-embedded horizontal seam connecting reinforcement area disclosed by the present invention

Figure 2a is a schematic perspective view of the structure of the bottom composite wallboard and the middle layer composite wallboard disclosed by the present invention;

Fig. 2b is a schematic perspective view of the structure of the top composite wallboard disclosed by the present invention;

Fig. 3 is the structural representation of the internal double-layer two-way steel mesh and space steel wire mesh disclosed by the present invention;

Fig. 4 is a schematic diagram of the vertical joint connection method of the lightweight precast concrete composite wallboard disclosed by the present invention;

Fig. 5 is a schematic diagram of the horizontal joint connection mode of the lightweight precast concrete composite wall panel disclosed by the present invention.

Reference signs: 1-reinforced concrete slab, 2-insulated concrete slab, 3-double-layer two-way steel mesh, 4-edge concealed column, 5-edge reinforcing steel bar, 6-tension bar, 7-horizontal distribution steel bar, 8 -Vertical stress reinforcement, 9-space steel wire mesh, 10-longitudinal steel wire truss, 11-horizontal steel wire truss, 12-groove, 13-horizontal wire rope sleeve, 14-vertical seam connection reinforcement, 15-metal bellows, 16 -Horizontal seam connection reinforcement, 17-grout anchor lap connection, 18-hanging point reinforcement, 19-foundation, 20-top surface of foundation, 21-mortar leveling layer, 22-grout inlet, 23-high-strength grouting material, 24- Planks, 25-window holes with beam stirrups.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1:

Referring to Figures 1a-1d, this embodiment discloses a lightweight prefabricated concrete composite wall panel, including an inner reinforced concrete slab 1 and an outer thermal insulation concrete slab 2; the reinforced concrete slab 1 is used as a load-bearing part of the wall panel, The interior is equipped with a double-layer two-way steel mesh 3; the interior of the thermal insulation concrete slab 2 adopts a space steel mesh 9 composed of criss-cross steel wire trusses, and the space steel mesh 9 is bound together with the outer steel bars of the double-layer two-way steel mesh 3 .

The thickness of the reinforced concrete slab 1 is not less than 140mm, and the concrete strength grade is not less than C30. The specific configuration of the stressed steel bars in the double-layer two-way steel mesh 3 is determined by the calculation of the internal force design value and the construction requirements in the specification.

The thermal insulation concrete slab 2 is made of thermal insulation concrete materials such as foam concrete, aerated concrete or airgel concrete, and its thickness is flexibly set to meet the thermal performance requirements of the wall panels in different regions.

The double-layer two-way reinforcement mesh 3 includes horizontal distribution reinforcement bars 7 and vertical stress reinforcement bars 8, and the horizontal distribution reinforcement bars 7 and vertical stress reinforcement bars 8 are welded into a whole.

The two sides of the reinforced concrete slab 1 are provided with edge concealed columns 4, and the four vertical stressed steel bars 8 in the edge concealed columns 4 are replaced by a pair of edge reinforcing steel bars 5, which is different from the existing edge concealed columns In 4, stirrups are used. The present invention adopts tie bars 6 to tie a pair of edge reinforcement bars 5. The diameter of the edge reinforcement bars 5 is not less than 12mm, and the diameter of the tie bars 6 is not less than 6mm, and the spacing is not greater than 150mm.

Referring to Figures 2a-2b, the middle part of the edge concealed column 4 is provided with grooves 12 and several horizontal steel wire rope sleeves 13 along the vertical direction. Insert vertical joints to connect steel bars 14, install planks 24 on both sides of the wall joints, and then grout to realize the semi-dry connection between the composite wall panels and the vertical joints of the composite wall panels.

Referring to Figures 2a-2b, the composite wall panels include a bottom composite wall panel, a middle layer composite wall panel, and a top layer composite wall panel. The metal bellows 15 connecting 17 has a horizontal seam connection steel bar 16 pre-embedded on the upper side, so as to realize the horizontal joint grout anchor lap connection 17 between the upper and lower adjacent middle layer composite wallboards or between the bottom composite wallboard and the foundation 19 . The lower side of the reinforced concrete slab 1 of the prefabricated composite wallboard on the top floor is reserved with a metal bellows 15 for the slurry anchor lap connection 17, and the vertical stressed steel bar 8 in the upper side of the reinforced concrete slab 1 is connected to the window hole. The beam stirrup 25 stretches out so as to be connected together with the cast-in-place ring beam and the cast-in-place floor.

Example 2

This embodiment discloses a method for preparing a lightweight prefabricated concrete composite wallboard. The composite wallboard is prefabricated in a factory and constructed by using a fixed formwork or a flowing water formwork, which specifically includes the following steps:

S1. Binding the double-layer bidirectional steel mesh 3 of the reinforced concrete slab 1 on the inner side, and binding the space steel wire mesh 9 of the thermal insulation concrete slab 2 on the outer side thereon. Among them, the double-layer two-way steel mesh 3 adopts pre-pressing electric welding technology, which can make the double-layer two-way steel mesh 3 be directly formed. At the same time, the edge reinforcement bars 5 and tie bars 6 are used to replace the longitudinal bars and stirrups in the edge concealed columns 4, reducing the number of bars. The workload of binding is convenient for industrialized production.

S2. After cleaning the surface residues of the mold required for the composite wallboard, assemble it. After cleaning the mold table at the position where the formwork is placed, fix the formwork position and apply a release agent.

S3. Place the double-layer two-way steel mesh 3 of the reinforced concrete slab 1 and the space steel mesh 9 of the thermal insulation concrete slab 2 on the bottom formwork of the composite wallboard, and place the double-layer two-way steel bars on the reinforced concrete slab 1 Pad blocks are evenly arranged under the net 3 to ensure the thickness of the protective layer of the reinforcement of the reinforced concrete slab layer 1.

S4. Bind the steel bars 18 at the hanging points or set threaded sleeves, and pre-embed metal bellows 15, horizontal steel wire rope sleeves 13, horizontal seams connecting the steel bars 16 and the pipelines and wire slots in the wall. The metal bellows 15, the horizontal steel wire rope cover 13, the horizontal seam connecting steel bars 16 and the pipelines and trunking in the wall must be positioned accurately, and the positioning error meets the acceptance specification requirements, so as to facilitate quick construction on the construction site. In addition, the diameter and spacing of the horizontal wire rope sleeves 13 meet the requirements of the specification, and the metal bellows 15, water and electricity pipes, and wire slots need to be filled to prevent concrete from entering the metal bellows 15, In water and electricity pipes and trunking.

S5. Pour the concrete of the reinforced concrete slab layer 1 to a specified thickness, vibrate and compact it with vibrating equipment, and then level the concrete surface. During this process, the amount of concrete pouring must be strictly controlled. If there is too much concrete, it must be shoveled out in time, so as to strictly control the thickness of the inner concrete slab 1, and the vibration must be uniform and sufficient to avoid problems such as honeycomb pockmarks on the wall panels. After vibrating, level the concrete surface.

S6. Pouring the thermal insulation concrete material for the thermal insulation concrete slab layer 2, pouring it to the specified thickness, using vibrating equipment to vibrate and compact it, and the vibration should be uniform and sufficient, so as to ensure the pouring quality and avoid problems such as honeycomb pockmarks on the wall panels. After that, the concrete surface is leveled and polished. In addition, tiles and other facade decoration structures can also be pasted on its surface to meet the needs of the facade shape of the wall panel.

S7. Put the wallboard under standard conditions or steam curing conditions for curing, and demould after reaching the demoulding conditions. When taking off the side formwork, both sides pre-embedded horizontal wire rope sleeves 13 will be pulled out from the side groove 12 of the reinforced concrete slab 1 in time to prevent the horizontal wire rope sleeves 13 from being embedded in the concrete. Continue curing to design strength after demoulding.

Example 3

This embodiment discloses a lightweight prefabricated concrete composite wall panel construction process, including:

S1. Complete the construction of the foundation 19, wherein the horizontal seam connecting steel bars 16 are pre-embedded and fixed when the foundation steel bars are bound, to ensure that the horizontal joint connecting steel bars 16 remain vertical and in an accurate position during the concrete pouring process of the foundation 19, so as to realize the prefabricated composite wall panel Reliable and accurate connection to base 19. After foundation 19 concrete pouring is completed, the foundation surface 20 should be roughened before the initial setting of the concrete, and the unevenness difference is not less than 4mm, so as to strengthen the connection effect between the bottom surface of the wallboard and the top surface 20 of the foundation.

S2. Before the hoisting construction of the prefabricated composite wallboard, lay a 20mm thick mortar leveling layer 21 on the surface of the foundation, fill the gap between the top surface of the foundation 20 and the bottom surface of the prefabricated composite wallboard and realize the bonding between the two surfaces.

S3. Hoist the composite wallboard described in Example 1 to a designated height, and while slowly lowering the prefabricated composite wallboard, insert the foundation 19 pre-embedded horizontal seam connecting steel bars 16 into the pre-embedded metal bellows 15 of the wallboard, and finally place the The prefabricated composite wallboard is placed on the uncondensed mortar leveling layer 21, and after adjusting the position and verticality of the wallboard, set the external support of the wallboard to fix the wallboard. The position and verticality of the wall panel should be adjusted accurately, and the error should be controlled within the range allowed by the specification.

S4. Pour the high-strength grouting material 23 from the grouting port 22 of the metal bellows 15 until the high-strength grouting material 23 overflows from the grouting port 22 of the metal bellows 15 . When grouting, the grouting quality must be ensured so that the high-strength grouting material 23 in the metal bellows 15 is uniform and dense without cavities and air bubbles, so as to ensure the reliability of the horizontal seam connection.

S5. Install the prefabricated composite wall panels of the same layer in place according to the method of steps S3 and S4, and pour high-strength grouting material 23 into them.

S6. Stack the horizontal wire rope sleeves 13 between the adjacent prefabricated composite wall panels, insert the vertical joints to connect the steel bars 14, nail the wooden boards 24 outside the vertical joint grooves 12, and then use high-strength grouting material 23 to pour from the upper part of the grooves 12, Until the high-strength grouting material 23 fills the cavity formed by the adjacent wallboard grooves 12 . To ensure the grouting quality, the high-strength grouting material 23 evenly fills the cavity formed by the side grooves 12 of adjacent prefabricated composite wall panels. The presence of cavities and air bubbles ensures the quality of the vertical seam connection.

S7. Fill the vertical joints between the prefabricated composite wallboards of the same layer into the high-strength grouting material 23 according to the method of step S5.

S8. Complete the construction of the floor.

S9. Complete the construction of other floors according to the method of steps S2-S8.

The wall panel of the present invention adopts reinforced concrete slabs for stress and thermal insulation for heat preservation, and adopts semi-dry connection methods that are the same as cast-in-place, such as horizontal steel wire rope sleeves-vertical joints, steel grouting connections, grout anchor lap connections, etc. Mechanical and seismic performance, it can be used as thermal insulation shear wall in actual engineering. Foam concrete, aerated concrete, airgel concrete and other insulating concrete materials are used as the outer insulation layer, which has good waterproof, fireproof and durable performance. Using the semi-dry connection method, there is less wet work on the construction site, and the construction efficiency is high. It can well meet the functional requirements of rural residences and urban low-rise and multi-storey buildings, and is conducive to further popularization and use.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The lightweight precast concrete composite wallboard is characterized by comprising an inner reinforced concrete slab layer and an outer heat preservation concrete slab layer; the reinforced concrete slab layer is used as a wallboard bearing part, and a double-layer bidirectional reinforcing mesh is arranged in the reinforced concrete slab layer; the inside space wire net that adopts vertically and horizontally staggered steel wire truss to constitute of thermal insulation concrete slab layer, and space wire net and the outer reinforcing bar ligature of double-deck two-way reinforcing bar net are in the same place.

2. The lightweight precast concrete composite wallboard of claim 1, wherein the double-layer bidirectional reinforcing mesh comprises horizontally distributed reinforcing bars and vertically stressed reinforcing bars, and the horizontally distributed reinforcing bars and the vertically stressed reinforcing bars are integrated by welding.

3. The lightweight precast concrete composite wallboard of claim 2, wherein edge hidden columns are arranged on two sides of the reinforced concrete slab layer, four vertical stress steel bars in the edge hidden columns are replaced by a pair of edge reinforcing steel bars, the pair of edge reinforcing steel bars are tied by tie bars, the diameter of the edge reinforcing steel bars is not less than 12mm, the diameter of the tie bars is not less than 6mm, and the distance is not more than 150mm.

4. A lightweight precast concrete composite wall panel as recited in claim 3, wherein the edge hidden posts are provided with grooves and a plurality of horizontal wire rope bushings in a vertical direction, and after the horizontal wire rope bushings in adjacent composite wall panels are stacked, vertical joint connection reinforcing bars are penetrated and then grouting is performed to realize reliable connection between the composite wall panels and the vertical joints of the composite wall panels.

5. The lightweight precast concrete composite wallboard of claim 4, wherein the composite wallboard comprises a bottom composite wallboard, a middle composite wallboard and a top composite wallboard, metal bellows used for slurry anchor lap joint are reserved on the lower sides of the bottom composite wallboard and the middle composite wallboard, and horizontal seam connecting steel bars are pre-buried on the upper sides of the bottom composite wallboard and the middle composite wallboard so as to realize horizontal seam slurry anchor lap joint between the upper and lower adjacent layers of composite wallboards or between the bottom composite wallboard and a foundation.

6. The lightweight precast concrete composite wallboard of claim 5, wherein a metal corrugated pipe for slurry anchor lap joint connection is reserved on the lower side of the reinforced concrete slab layer of the top-layer composite wallboard, and vertical stress steel bars and window hole beam connecting stirrups in the upper side of the reinforced concrete slab layer extend so as to be connected with the cast-in-situ girt and the cast-in-situ floor.

7. The lightweight precast concrete composite wallboard of any one of claims 1 to 6, wherein the reinforced concrete panel layer thickness is not less than 140mm, and the concrete strength grade is not less than C30.

8. The lightweight precast concrete composite wallboard of any one of claims 1 to 6, wherein the insulated concrete slab is foam concrete, aerated concrete, or aerogel concrete.

9. The preparation method of the lightweight precast concrete composite wallboard is characterized by comprising the following steps of:

s1, binding a double-layer bidirectional reinforcing steel bar net of a reinforced concrete slab layer, and binding a space steel wire net of a heat-insulating concrete slab layer on the double-layer bidirectional reinforcing steel bar net;

s2, assembling a mould required by the wallboard on a mould table, and coating a release agent in the mould;

s3, placing a bound double-layer bidirectional steel bar mesh and a space steel wire mesh on the bottom die of the wallboard, and uniformly arranging cushion blocks under the double-layer bidirectional steel bar mesh;

s4, binding a lifting point steel bar or a threaded sleeve at the position of the lifting point, and embedding a metal corrugated pipe, a horizontal seam connecting steel bar, a horizontal steel wire rope sleeve and a hydropower pipeline;

s5, pouring concrete of the reinforced concrete slab layer to a specified thickness, and compacting and flattening by vibrating equipment;

s6, pouring concrete of the heat-insulating concrete slab layer to a specified thickness, and compacting and flattening by vibrating equipment;

s7, curing the wallboard under standard conditions or steam curing conditions, demolding after the demolding conditions are reached, and continuing to cure until the design strength is reached.

10. The construction process of the lightweight precast concrete composite wallboard is characterized by comprising the following steps of:

s1, completing construction of a foundation, wherein horizontal seam connecting steel bars are pre-buried when foundation steel bars are bound, and after foundation concrete is poured, the surface of the foundation is napped, wherein the concave-convex difference is not smaller than 4mm;

s2, paving a mortar leveling layer with the thickness of 20mm on the surface of the foundation;

s3, hoisting the composite wallboard prepared according to the method 9 to a specified height, slowly putting down the prefabricated composite wallboard, inserting a foundation embedded horizontal seam connecting steel bar into an embedded metal corrugated pipe of a reinforced concrete slab layer, finally placing the prefabricated composite wallboard on a mortar leveling layer which is not coagulated, and setting an external support of the composite wallboard to fix the composite wallboard after adjusting the position and the verticality of the composite wallboard;

s4, pouring high-strength grouting material from a grouting opening of the metal corrugated pipe;

s5, installing the composite wallboard of the same layer in place according to the method of the steps S3 and S4, and pouring high-strength grouting material;

s6, stacking horizontal steel wire ropes between adjacent composite wallboards, inserting vertical joint connecting steel bars, nailing the wood boards outside the vertical joint grooves, and then pouring high-strength grouting materials from the upper parts of the grooves until the high-strength grouting materials fill cavities formed by the grooves of the adjacent wallboards;

s7, filling high-strength grouting material into the vertical joints between the composite wallboards of the same layer according to the method of the step S5;

s8, finishing construction of the floor system;

s9, completing construction of other floors according to the method of the steps S2-S8.

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