CN113149583B - Spliced autoclaved aerated concrete plate and preparation method thereof - Google Patents
Spliced autoclaved aerated concrete plate and preparation method thereof Download PDFInfo
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- CN113149583B CN113149583B CN202110417265.1A CN202110417265A CN113149583B CN 113149583 B CN113149583 B CN 113149583B CN 202110417265 A CN202110417265 A CN 202110417265A CN 113149583 B CN113149583 B CN 113149583B
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- aerated concrete
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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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/10—Lime cements or magnesium oxide cements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
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Abstract
The invention discloses a spliced autoclaved aerated concrete plate and a preparation method thereof, wherein the spliced autoclaved aerated concrete plate comprises the following steps: s1, mixing and stirring: uniformly mixing and stirring the ingredients to form slurry; s2 casting molding: pouring the stirred slurry into the mold; s3 maintenance: sending the mould poured with the slurry into a curing chamber for gas generation and static curing to obtain an aerated concrete blank; s4 cutting: transversely cutting and longitudinally cutting the aerated concrete blank to form a rectangular aerated concrete plate; s5 slotting: clamping grooves are formed in two ends of the aerated concrete plates in the length direction respectively and used for assembling clamping pieces, and the clamping pieces enable the end parts of two adjacent aerated concrete plates to be connected; s6 steam-curing: and putting the grooved aerated concrete plate into a still kettle for steam curing to obtain the autoclaved aerated concrete plate. The invention effectively improves the strength of the autoclaved aerated concrete plate and the wall masonry efficiency and quality.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a spliced autoclaved aerated concrete plate and a preparation method thereof.
Background
The autoclaved aerated concrete plate is a porous concrete product prepared by using fly ash, lime, cement, gypsum, slag and the like as main raw materials, adding a proper amount of a gas former, a regulator and a bubble stabilizer, and carrying out processes of burdening, stirring, pouring, static curing, cutting, steam curing and the like. The autoclaved aerated concrete plate has the advantages of good heat insulation performance, light weight, good damping and sound insulation effects and the like, can be processed by sawing, planing, drilling and the like, and is more and more applied to building inner walls because the autoclaved aerated concrete plate has larger volume and faster construction speed. When the autoclaved aerated concrete plates are constructed, the edges and corners of the plates need to be aligned and arranged and then stacked, and often, construction personnel with rich experience is needed for operation, so that the autoclaved aerated concrete plates are complicated, the construction speed is reduced, and the wall body built by the autoclaved aerated concrete plates is easy to crack.
Disclosure of Invention
Therefore, a preparation method of the spliced autoclaved aerated concrete plate is needed to be provided, and the technical problems that the existing autoclaved aerated concrete plate is high in wall construction requirement, low in construction efficiency and easy to crack are solved.
In order to realize the purpose, the invention provides a preparation method of a spliced autoclaved aerated concrete plate, which comprises the following steps:
s1, mixing and stirring: uniformly mixing and stirring the ingredients into slurry, wherein the ingredients comprise 20-30 parts by weight of cement, 10-23 parts by weight of lime, 5-10 parts by weight of fly ash, 35-70 parts by weight of fine sand and 0.14-0.17 part by weight of aluminum powder;
s2 casting molding: presetting a reinforcing mesh in a mould, and pouring the stirred slurry into the mould to embed the reinforcing mesh in the ingredients;
s3 maintenance: sending the mould poured with the slurry into a curing chamber for gas generation and static curing to obtain an aerated concrete blank, wherein the room temperature of the curing chamber is 60-80 ℃, and the curing time is 1.5-2 h;
s4 cutting: transversely cutting and longitudinally cutting the aerated concrete blank to form a rectangular aerated concrete plate;
s5 slotting: clamping grooves are formed in two ends of the aerated concrete plates in the length direction respectively and used for assembling clamping pieces, and the clamping pieces enable the end parts of two adjacent aerated concrete plates to be connected;
s6 steam-curing: and putting the grooved aerated concrete plate into a still kettle for steam curing to obtain the autoclaved aerated concrete plate, wherein the steam curing temperature is 190-200 ℃, and the pressure is 1.1-1.2 Mpa.
Further, the S5 slotting further includes the steps of:
milling a first groove in the middle of the upper surface of the aerated concrete plate in the thickness direction, forming upward bosses on two sides of the first groove in the width direction of the aerated concrete plate, and milling a second groove on the lower surface of the aerated concrete plate in two sides of the aerated concrete plate in the width direction;
the boss is used for being matched with the second groove of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, the top of the boss is abutted against the top of the second groove of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, the lower surfaces of the first groove and the another autoclaved aerated concrete plate adjacent to the boss in the vertical direction form a slurry containing groove for containing cement mortar, and the slurry containing groove is communicated with the clamping groove.
Further, still include step prefabrication the joint spare: the clamping piece is a precast concrete component, the sectional area of the middle part of the clamping piece is smaller than the sectional areas of the two ends of the clamping piece, and the two ends of the clamping piece are respectively clamped with the clamping grooves of the two horizontally adjacent autoclaved aerated concrete plates;
the joint spare is provided with the injected hole, the one end in injected hole is located the upper surface of joint spare, the other end in injected hole extends to the tip of joint spare and with hold the grout groove intercommunication.
Further, the method also comprises the step of S7:
s71, arranging more than two autoclaved aerated concrete plates in the horizontal direction in the building, wherein the clamping grooves of two adjacent autoclaved aerated concrete plates are opposite, and clamping pieces are arranged in the clamping grooves to enable the two adjacent autoclaved aerated concrete plates to be spliced together;
s72, stacking an autoclaved aerated concrete plate on the autoclaved aerated concrete plate by adopting the step S71, splicing the second groove with the boss of the vertically adjacent autoclaved aerated concrete plate at the lower layer, and forming a mortar containing groove for containing cement mortar on the lower surface of the first groove and the vertically adjacent autoclaved aerated concrete plate;
and injecting prefabricated cement mortar into the mortar containing groove along the grouting holes by adopting a pressurizing pump, so that two adjacent autoclaved aerated concrete plates in the vertical direction are bonded together.
Further, the force (forcing) pump is including the box that is used for holding cement mortar to and set up in the gear pump of bottom half, the discharge end of gear pump is connected with many hoses, through many the hose can be simultaneously to a plurality of the slip casting hole pours into cement mortar.
Further, the hose of the pressurization pump is connected with a pressure sensor or a flowmeter, the pressure sensor is used for detecting the pressure value in the hose, and the flowmeter is used for detecting the flow rate of cement mortar in the hose;
and when the pressure pump pours cement mortar into the grouting hole, stopping pouring the cement mortar into the grouting hole when the pressure value in the hose is greater than a preset pressure value or the cement mortar in the hose reaches a preset pouring amount.
Furthermore, the clamping groove is a dovetail groove or a clamping groove with a convex section.
Further, in the step of casting and molding at S2, a plurality of layers of the steel mesh sheets are arranged in the depth direction of the mold, and a plurality of steel mesh sheets are arranged in each layer of the steel mesh sheets in the length direction of the mold;
the steel bar net piece is connected to the top cover of the mould or the steel bar net piece on the upper layer through a lifting rope;
and pouring the stirred ingredients into the die, so that the reinforcing mesh is embedded into the ingredients.
Further, the step S3 is maintenance: the method comprises the following steps:
the mold can be closed to form a closed cavity, a vacuumizing interface is arranged on a top cover of the mold, the mold poured with the slurry is vacuumized to enable the interior of the mold to form-90 KPa to-80 KPa, then the mold is sent into a curing chamber to be subjected to gas generation and static curing to obtain an aerated concrete blank, the room temperature of the curing chamber is 60-80 ℃, and the curing time is 1.5-2 hours.
In another technical scheme, the spliced autoclaved aerated concrete plate is prepared by the preparation method of any one of the technical schemes.
Compared with the prior art, the spliced autoclaved aerated concrete plate preparation method adopting the technical scheme has the advantages that the reinforcing mesh is preset in the autoclaved aerated concrete plate, so that the strength of the autoclaved aerated concrete is improved, clamping grooves are formed in two ends of the autoclaved aerated concrete, and two horizontally adjacent autoclaved aerated concretes can be spliced through the clamping pieces; and the upper surface of the autoclaved aerated concrete is provided with a boss, the two sides of the lower surface of the autoclaved aerated concrete are provided with second grooves, and the splicing of two adjacent autoclaved aerated concrete in the vertical direction can be realized through the boss and the second grooves. And the lower surface of the other adjacent autoclaved aerated concrete plate in the vertical direction and the first groove form a slurry containing groove for containing cement mortar, so that when a wall body is built, a constructor only needs to splice the adjacent autoclaved aerated concrete plates together along the horizontal direction and the vertical direction, and then certain cement mortar is injected into the slurry containing groove through the grouting holes to bond and cure the autoclaved aerated concrete plates. The invention greatly reduces the masonry difficulty of the autoclaved aerated concrete plate wall, improves the masonry efficiency of the wall and solves the problem of wall cracking.
Drawings
FIG. 1 is a flow chart of a method for preparing a spliced autoclaved aerated concrete slab according to a specific embodiment;
FIG. 2 is a schematic perspective view of an autoclaved aerated concrete slab according to a specific embodiment;
FIG. 3 is a top view of the autoclaved aerated concrete slab according to the embodiment spliced in the horizontal direction;
FIG. 4 is a schematic diagram of splicing autoclaved aerated concrete plates in the vertical direction according to the embodiment;
FIG. 5 is a schematic perspective view of the clip member according to the embodiment;
FIG. 6 is a schematic diagram of the masonry of the wall according to the embodiment;
FIG. 7 is a schematic view of another embodiment of the masonry of a wall;
FIG. 8 is a schematic view of the mold and the position of the rebar grid therein within the mold according to one embodiment;
description of reference numerals:
1. steaming and pressing an aerated concrete plate;
11. a clamping groove;
12. a first groove;
120. a slurry containing groove;
121. a boss;
13. a second groove;
2. a clamping piece;
21. grouting holes;
3. a pressure pump;
31. a hose;
101. a mold;
102. a lifting rope;
103. a pouring gate;
104. reinforcing mesh sheets;
105. a mold top cover;
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1 to 8, the embodiment provides a method for preparing a spliced autoclaved aerated concrete slab. The method comprises the steps of preparing an autoclaved aerated concrete plate, an autoclaved aerated concrete plate and a spliced aerated concrete plate, wherein the direction indicated by an arrow X is the length direction of the autoclaved aerated concrete plate, the direction indicated by an arrow Y is the thickness direction of the autoclaved aerated concrete plate, and the direction indicated by an arrow Z is the height direction of the autoclaved aerated concrete plate. As shown in fig. 1, the preparation method of the spliced autoclaved aerated concrete plate comprises the following steps:
s1, mixing and stirring: uniformly mixing and stirring the ingredients into slurry, wherein the ingredients comprise 20-30 parts by weight of cement, 10-23 parts by weight of lime, 5-10 parts by weight of fly ash, 35-70 parts by weight of fine sand and 0.14-0.17 part by weight of aluminum powder;
s2 casting molding: presetting a reinforcing mesh in a mould, and pouring the stirred slurry into the mould to embed the reinforcing mesh in the ingredients;
s3 maintenance: sending the mould poured with the slurry into a curing chamber for gas generation and static curing to obtain an aerated concrete blank, wherein the room temperature of the curing chamber is 60-80 ℃, and the curing time is 1.5-2 h;
s4 cutting: transversely cutting and longitudinally cutting the aerated concrete blank to form a rectangular aerated concrete plate;
s5 slotting: clamping grooves are formed in the two ends of the aerated concrete plate in the length direction respectively and used for assembling clamping pieces, and the clamping pieces enable the end parts of two adjacent aerated concrete plates to be connected;
s6 steam-curing: and putting the grooved aerated concrete plate into a still kettle for steam curing to obtain the autoclaved aerated concrete plate, wherein the steam curing temperature is 190-200 ℃, and the pressure is 1.1-1.2 Mpa.
In step S1, the ingredients of cement, lime, fly ash, fine sand and aluminum powder, etc. in weight portion, include 20-30 portions of cement, 10-23 portions of lime, 5-10 portions of fly ash, 35-70 portions of fine sand and 0.14-0.17 portion of aluminum powder. In one embodiment, the content ratio of the fly ash can be 70%; consumption per cubic meter: 350 kg; the content ratio of the cement is 13.8%; consumption per cubic meter: 25-30 kg; the content ratio of lime is 13.8%; consumption per cubic meter: 140-150 kg; the content ratio of the fine sand is 2.96 percent; consumption per cubic meter: 15 kg; aluminum powder: the content is trace; consumption per cubic meter: 0.4 kg. In other embodiments, the proportions of the cement, lime, fly ash, fine sand and aluminum powder can be properly adjusted according to actual needs. The cement, the lime, the fly ash, the fine sand and the aluminum powder are mixed and then stirred into slurry by a stirring device.
As shown in fig. 8, in step S2, a plurality of reinforcing mesh sheets 104 are preset in the mold, the plurality of reinforcing mesh sheets 104 are arranged at intervals along the horizontal direction, and a plurality of layers are arranged at intervals along the vertical direction, and the stirred slurry is poured into the mold 101, so that the reinforcing mesh sheets 104 are buried in the ingredients. The isolation distance of the steel mesh sheets 104 corresponds to the size of the prepared autoclaved aerated concrete plates, and the center position inside each autoclaved aerated concrete plate corresponds to at least one steel mesh sheet 104. In order to improve the accuracy of the preset position of the steel mesh 104, in an embodiment, the steel mesh 104 is connected to the top cover 105 of the mold or the steel mesh 104 on the upper layer by a lifting rope 102; the steel mesh sheet 104 on the lower layer is connected to the adjacent steel mesh sheet on the upper layer through the lifting rope 102, and the steel mesh sheet on the topmost layer is connected to the top cover 105 of the mold through the lifting rope 102.
Preferably, in an embodiment, the lifting rope 102 may be a glass fiber wire, and the glass fiber wire may be well bonded with the slurry after the slurry is poured into the mold 101, so as to improve the compressive strength of the autoclaved aerated concrete slab, and the glass fiber wire is also conveniently cut in the subsequent step of S4 cutting.
After the slurry is poured into the mold 101, the process proceeds to step S3, and in step S3, the mold with the slurry poured therein is sent to a curing chamber for gas generation and static curing, and the slurry at this stage generates a large amount of bubbles to foam and expand the slurry to form an aerated concrete blank. In the gas-forming and static curing stage, the room temperature of the curing room is 60-80 ℃, and the curing time is 1.5-2 h. After the initial curing, the mould and the blank are lifted to a cutting table with a kettle bottom plate placed in advance by a lifting appliance to remove the mould, and then the step S4 is carried out.
In step S4, a cutting machine is needed to perform transverse cutting, longitudinal cutting, bread milling and the like on the autoclaved aerated concrete 100 green body, the mold is lifted back to the mold conveying vehicle for manual cleaning and oil removal, then the mold is lifted to the mold conveying vehicle for assembly for next use, green body leftover materials generated during cutting are sent to a waste slurry stirring loop machine beside the cutting machine through a screw conveyor, and water is added to prepare waste slurry for use when ingredients are required.
And (3) carrying out S6 steam curing after the step of S5 grooving, opening a still kettle door to be discharged from the kettle after finishing grouping the grooved autoclaved aerated concrete plate blank on a parking line in front of the still kettle, and pulling a vehicle winch of the still kettle to be steamed into the still kettle for curing. The steam curing temperature in the autoclave is 195-210 ℃, the pressure is 1.2-1.3 Mpa, and the hardness of the aerated concrete plate after steam curing is more than 2.0 Mpa. Finished products on a kettle vehicle of the still kettle are hoisted to a finished product warehouse by a bridge crane, then transported to a finished product storage yard by a fork type loading and unloading vehicle, the empty kettle vehicle and a kettle bottom plate are hoisted back to a return line, and the finished products are pulled back to a stacking frame by a hoist to carry out next circulation after being cleaned.
In one embodiment, the S3 curing includes the steps of: the mold 101 comprises a mold top cover 105, the mold top cover 105 can cover the mold 101 to form a closed cavity, a pouring gate 103 is arranged on the mold top cover 105, and the stirred slurry can be poured into the mold through the pouring gate 103. The pouring gate 103 can also be used for vacuumizing the interior of the mold, the mold poured with the slurry is vacuumized to form-90 KPa to-80 KPa in the interior of the mold, and then the mold is sent into a curing room for gas generation and static curing to obtain an aerated concrete blank, wherein the room temperature of the curing room is 60-80 ℃, and the curing time is 1.5-2 h.
As shown in fig. 8, the mold 101 includes a mold top cover 105 and a mold frame, a gate 103 is disposed on the mold top cover 105, the mold top cover 105 is detachably connected to the mold frame, and a sealant is disposed at a joint of the mold top cover 105 and the mold frame, so that the mold top cover 105 is hermetically connected to the mold frame, and when the gate 103 is closed, a sealed cavity can be formed inside the mold 101. The gate 103 of the mold 101 may be used when a vacuum interface is used, in addition to pouring the slurry. The pouring gate 103 is connected with a vacuum pump to vacuumize the interior of the mold 101, so that-90 KPa to-80 KPa is formed in the interior of the mold. In the embodiment, the negative pressure condition in the mold 101 is favorable for the gas generation of the aerated concrete blank, so that the aerated concrete blank has higher porosity, and the prepared autoclaved aerated concrete plate has a better heat insulation effect. Tests show that under the condition of the same other conditions, the heat conduction system (dry state) of the prepared autoclaved aerated concrete plate is less than 0.5W/m.k under the negative pressure condition of-90 KPa to-80 KPa, and the heat conduction system (dry state) of the prepared autoclaved aerated concrete plate is about 0.8W/m.k under the normal pressure curing condition.
The step S4 includes the steps of demoulding, transversely cutting and longitudinally cutting the aerated concrete blank, wherein the transverse cutting direction is parallel to the length direction of the autoclaved aerated concrete plate, namely, the cutting is carried out along the directions indicated by an arrow X and an arrow Y in the figure; the longitudinal cutting direction is parallel to the height direction of the autoclaved aerated concrete plate, namely, the cutting is carried out along the direction indicated by an arrow Z in the figure. When the transverse cutting is carried out, the aerated concrete blank can be cut by adopting a steel wire, the steel wire is tensioned and fixed on an arm support, the steel wire is driven by the arm support to reciprocate left and right, and the aerated concrete blank is driven by a conveying mechanism to feed the steel wire for transverse cutting. When the aerated concrete blank is cut longitudinally, the aerated concrete blank after transverse cutting can be cut by driving the steel wire to feed longitudinally. And obtaining the rectangular aerated concrete block through the transverse cutting and the longitudinal cutting.
After the transverse cutting and the longitudinal cutting in the step S4 are completed, the step S5 of slotting can be performed, as shown in fig. 2, which is a schematic structural diagram of the autoclaved aerated concrete plate obtained after slotting and steam curing S5. In the step of S5 grooving, clamping grooves 11 are respectively formed at two ends of each autoclaved aerated concrete plate 1 in the length direction, as shown in fig. 3, the clamping grooves 11 are used for assembling clamping pieces 2, and the clamping pieces 2 connect the end portions of two adjacent autoclaved aerated concrete plates 1 together. The clamping piece is a precast concrete component, the sectional area of the middle part of the clamping piece is smaller than the sectional areas of the two ends of the clamping piece, and the two ends of the clamping piece are respectively clamped with the clamping grooves of the two horizontally adjacent autoclaved aerated concrete plates.
As shown in fig. 2 and 3, in this embodiment, the clamping grooves 11 are dovetail grooves, the clamping grooves 11 of two horizontally adjacent autoclaved aerated concrete slabs 1 are connected to form an hourglass-shaped through groove with a smallest cross section in the middle, the shape of the clamping member 2 is adapted to the hourglass-shaped through groove, two ends of the clamping member 2 are respectively clamped into the clamping grooves 11 of the corresponding ends, and the two horizontally adjacent autoclaved aerated concrete slabs 1 are fixedly spliced together. In other embodiments, the clamping grooves 11 may also be clamping grooves with a convex cross section, the clamping grooves 11 of two adjacent autoclaved aerated concrete plates 1 in the horizontal direction are connected to form an i-shaped through groove with the smallest cross section in the middle, and the clamping piece 2 is an i-shaped connecting piece matched with the clamping groove.
As shown in fig. 2, the slotting step further includes the steps of: a first groove 12 is milled in the middle of the upper surface of the aerated concrete plate 1 in the thickness direction, upward bosses 121 are formed on the first groove 12 along the two sides of the aerated concrete plate in the width direction, and second grooves 13 are milled on the lower surface of the aerated concrete plate along the two sides of the aerated concrete plate in the width direction.
As shown in fig. 4, the boss 121 is a rectangular boss, the second groove 13 is a rectangular groove, the boss 121 is used for being matched with the second groove 13 of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, the top of the boss 121 abuts against the top of the second groove 13 of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, a grout accommodating groove 120 for accommodating cement mortar is formed on the lower surface of the first groove 12 and the lower surface of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, and the grout accommodating groove is communicated with the clamping groove. Two vertically adjacent autoclaved aerated concrete plates can be bonded together through cement mortar in the mortar containing groove 120.
In the embodiment, the steel bar net is preset in the autoclaved aerated concrete plate, so that the strength of the autoclaved aerated concrete is improved, and the cracking of the wall body of the autoclaved aerated concrete plate can be prevented; clamping grooves 11 are formed in two ends of the autoclaved aerated concrete, and two horizontally adjacent autoclaved aerated concretes can be spliced through the clamping pieces 2; and the boss 121 is arranged on the upper surface of the autoclaved aerated concrete, the second grooves 13 are arranged on the two sides of the lower surface of the autoclaved aerated concrete, and the splicing of two adjacent autoclaved aerated concrete in the vertical direction can be realized through the boss 121 and the second grooves 13. Therefore, when the wall is built, the constructors only need to splice the adjacent autoclaved aerated concrete plates together along the horizontal direction and the vertical direction, and the building efficiency of the wall is greatly improved.
As shown in fig. 5 and 6, in one embodiment, the clip member 2 is provided with a grouting hole 21, which may be formed by pre-arranging a pipe in the clip member or drilling the grouting hole 21 on the clip member 2. One end of the grouting hole 21 is located on the upper surface of the clamping member 2, and the other end of the grouting hole 21 extends to the end of the clamping member and is communicated with the slurry containing groove 120. When the clamping piece 2 is assembled in place in the clamping groove 11, the grouting hole 21 is communicated with the slurry containing groove 120, and cement mortar can be injected into the slurry containing groove 120 through the opening of the grouting hole 21 on the upper surface of the clamping piece 2.
Fig. 7 is a schematic view of another embodiment of building a wall by using the autoclaved aerated concrete slab. Unlike the embodiment shown in fig. 6, in the embodiment shown in fig. 6, the autoclaved aerated concrete slab is laid flat in the horizontal direction, and in the present embodiment, the autoclaved aerated concrete slab is laid by splicing vertically.
As shown in fig. 8, the above embodiment further includes step S7 of building interior wall masonry:
s71, arranging more than two autoclaved aerated concrete plates 1 in a building along the horizontal direction, enabling the clamping grooves 11 of every two adjacent autoclaved aerated concrete plates 1 to be opposite, and placing the clamping pieces 2 in the clamping grooves 11 to enable the two adjacent autoclaved aerated concrete plates 1 to be spliced together;
s72, stacking an autoclaved aerated concrete plate 1 on the autoclaved aerated concrete plate by adopting the step S71, splicing the second groove 13 with the boss 121 of the vertically adjacent autoclaved aerated concrete plate at the lower layer, and forming a mortar containing groove 120 for containing cement mortar on the lower surface of the first groove 12 and the vertically adjacent autoclaved aerated concrete plate; and the grouting holes 21 on the clamping members 2 are communicated with the grout accommodating grooves 120.
And (3) injecting prefabricated cement mortar into the mortar containing groove along the grouting holes 21 on the upper surface of the clamping piece 2 by using a pressurizing pump, so that two adjacent autoclaved aerated concrete plates in the vertical direction are bonded together. As shown in fig. 8, the pressure pump 3 includes a box for containing cement mortar, and a gear pump disposed at the bottom of the box, the discharge end of the gear pump is connected with a plurality of hoses 31, and cement mortar can be poured into the grouting holes 21 of the plurality of clamping members 2 through the plurality of hoses 31.
In the prior art, six surfaces of the autoclaved aerated concrete plate are all planes, the using amount and the laying thickness of cement mortar are not easy to control when a wall body is built, and the cement mortar is easy to overflow to the wall surface to influence the flatness of the wall surface. In the above embodiment, the autoclaved aerated concrete plates are vertically spliced through the second grooves 13 and the bosses 121, so that the autoclaved aerated concrete plates are aligned and positioned in the vertical direction conveniently. And the first groove 12 and the lower surface of another autoclaved aerated concrete plate adjacent in the vertical direction form a slurry containing groove 120 with a fixed volume for containing cement mortar, so that the cement mortar can be prevented from overflowing to the wall surface, and the pouring amount of the cement mortar can be accurately controlled through a pressurizing pump. Thereby reducing the difficulty of wall masonry, ensuring the efficiency of wall masonry and simultaneously improving the flatness of wall masonry.
In one embodiment, in order to precisely control the amount of cement mortar injected into the mortar receiving tank 120, the hose of the pressure pump 3 is connected with a pressure sensor or a flow meter, the pressure sensor is used for detecting the pressure value in the hose, and the flow meter is used for detecting the flow rate of cement mortar in the hose;
and when the pressure pump pours cement mortar into the grouting hole, stopping pouring the cement mortar into the grouting hole when the pressure value in the hose is greater than a preset pressure value or the cement mortar in the hose reaches a preset pouring amount.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (9)
1. The preparation method of the spliced autoclaved aerated concrete plate is characterized by comprising the following steps:
s1, mixing and stirring: uniformly mixing and stirring the ingredients into slurry, wherein the ingredients comprise 20-30 parts by weight of cement, 10-23 parts by weight of lime, 5-10 parts by weight of fly ash, 35-70 parts by weight of fine sand and 0.14-0.17 part by weight of aluminum powder;
s2 casting molding: presetting a reinforcing mesh in a mould, and pouring the stirred slurry into the mould to embed the reinforcing mesh in the ingredients;
s3 maintenance: sending the mould poured with the slurry into a curing chamber for gas generation and static curing to obtain an aerated concrete blank, wherein the room temperature of the curing chamber is 60-80 ℃, and the curing time is 1.5-2 h;
s4 cutting: transversely cutting and longitudinally cutting the aerated concrete blank to form a rectangular aerated concrete plate;
s5 slotting: clamping grooves are formed in the two ends of the aerated concrete plate in the length direction respectively and used for assembling clamping pieces, and the clamping pieces enable the end parts of two adjacent aerated concrete plates to be connected;
s6 steam-curing: placing the grooved aerated concrete plate into an autoclave for steam curing to obtain an autoclaved aerated concrete plate, wherein the steam curing temperature is 190-200 ℃, and the pressure is 1.1-1.2 Mpa;
the S5 slotting further comprises the steps of:
milling a first groove in the middle of the upper surface of the aerated concrete plate in the thickness direction, forming upward bosses on two sides of the first groove in the width direction of the aerated concrete plate, and milling a second groove on the lower surface of the aerated concrete plate in two sides of the aerated concrete plate in the width direction;
the boss is used for being matched with the second groove of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, the top of the boss is abutted against the top of the second groove of another autoclaved aerated concrete plate adjacent to the boss in the vertical direction, the lower surfaces of the first groove and the another autoclaved aerated concrete plate adjacent to the boss in the vertical direction form a slurry containing groove for containing cement mortar, and the slurry containing groove is communicated with the clamping groove.
2. The preparation method of the spliced autoclaved aerated concrete plate according to claim 1, further comprising the following steps of: the clamping piece is a precast concrete component, the sectional area of the middle part of the clamping piece is smaller than the sectional areas of the two ends of the clamping piece, and the two ends of the clamping piece are respectively clamped with the clamping grooves of the two horizontally adjacent autoclaved aerated concrete plates;
the joint spare is provided with the injected hole, the one end in injected hole is located the upper surface of joint spare, the other end in injected hole extends to the tip of joint spare and with hold the grout groove intercommunication.
3. The preparation method of the spliced autoclaved aerated concrete plate according to claim 2, further comprising S7 building internal wall masonry:
s71, arranging more than two autoclaved aerated concrete plates in the horizontal direction in the building, wherein the clamping grooves of two adjacent autoclaved aerated concrete plates are opposite, and the clamping pieces are arranged in the clamping grooves to enable the two adjacent autoclaved aerated concrete plates to be spliced together;
s72, stacking an autoclaved aerated concrete plate on the autoclaved aerated concrete plate by adopting the step S71, splicing the second groove with the boss of the vertically adjacent autoclaved aerated concrete plate at the lower layer, and forming a slurry containing groove for containing cement mortar on the lower surface of the first groove and the vertically adjacent autoclaved aerated concrete plate;
and injecting prefabricated cement mortar into the mortar containing groove along the grouting holes by adopting a pressurizing pump, so that two adjacent autoclaved aerated concrete plates in the vertical direction are bonded together.
4. The method for preparing the spliced autoclaved aerated concrete plate according to claim 3, wherein the pressure pump comprises a box body for containing cement mortar and a gear pump arranged at the bottom of the box body, a discharge end of the gear pump is connected with a plurality of hoses, and the cement mortar can be simultaneously poured into the plurality of grouting holes through the plurality of hoses.
5. The spliced autoclaved aerated concrete plate preparation method according to claim 4, wherein the hose of the pressurizing pump is connected with a pressure sensor or a flowmeter, the pressure sensor is used for detecting the pressure value in the hose, and the flowmeter is used for detecting the flow rate of cement mortar in the hose;
and when the pressure pump pours cement mortar into the grouting hole, stopping pouring the cement mortar into the grouting hole when the pressure value in the hose is greater than a preset pressure value or the cement mortar in the hose reaches a preset pouring amount.
6. The preparation method of the spliced autoclaved aerated concrete plate according to claim 1, wherein the clamping groove is a dovetail groove or a clamping groove with a convex section.
7. The method for preparing the spliced autoclaved aerated concrete plate according to claim 1, wherein in the step of S2 casting, a plurality of layers of the steel bar mesh sheets are arranged along the depth direction of the mold, and a plurality of steel bar mesh sheets are arranged on each layer of the steel bar mesh sheets along the length direction of the mold;
the steel bar net piece is connected to the top cover of the mould or the steel bar net piece on the upper layer through a lifting rope;
and pouring the stirred ingredients into the die, so that the reinforcing mesh is embedded into the ingredients.
8. The preparation method of the spliced autoclaved aerated concrete slab as claimed in claim 1, wherein the curing in step S3 is as follows: the method comprises the following steps:
the mold can be closed to form a closed cavity, a vacuumizing interface is arranged on a top cover of the mold, the mold poured with the slurry is vacuumized to enable the interior of the mold to form-90 KPa to-80 KPa, then the mold is sent into a curing chamber to be subjected to gas generation and static curing to obtain an aerated concrete blank, the room temperature of the curing chamber is 60-80 ℃, and the curing time is 1.5-2 hours.
9. The spliced autoclaved aerated concrete plate is characterized by being prepared by the preparation method of the spliced autoclaved aerated concrete plate according to any one of claims 1 to 8.
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| CN102080426A (en) * | 2011-02-14 | 2011-06-01 | 上海富春建业科技股份有限公司 | Steel wire mesh autoclaved aerated concrete slab |
| DE102014011912B4 (en) * | 2014-08-12 | 2016-08-25 | Xella Baustoffe Gmbh | Method and apparatus for the production of insulation boards according to the pore or foam concrete technology, a cutting device for cutting hardened blocks and use of the cutting device |
| CN105174833A (en) * | 2015-08-14 | 2015-12-23 | 江苏金立方环保科技有限公司 | Production technology for autoclaved aerated concrete building block |
| CN111574172A (en) * | 2020-05-19 | 2020-08-25 | 安徽铭科新型建材有限公司 | Autoclaved aerated concrete slab and manufacturing process thereof |
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