CN114292063B - Lightweight foam concrete and preparation method thereof - Google Patents
Lightweight foam concrete and preparation method thereof Download PDFInfo
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- CN114292063B CN114292063B CN202210044094.7A CN202210044094A CN114292063B CN 114292063 B CN114292063 B CN 114292063B CN 202210044094 A CN202210044094 A CN 202210044094A CN 114292063 B CN114292063 B CN 114292063B
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Abstract
The invention belongs to the technical field of concrete materials, in particular to a light foam concrete and a preparation method thereof, wherein the obtained cement slurry is divided into two parts, foaming agent foam is added into one part, then rapid stirring is carried out, uniform fluid slurry is prepared by stirring, then the obtained uniform fluid slurry is injected into a forming die, standing forming and demoulding are carried out, an initial blank is obtained, the cement slurry is injected into the surface of the initial blank, a layer of cement slurry is uniformly smeared on the surface of the initial blank, and standing maintenance is carried out at room temperature, so that the light foam concrete is obtained; through carrying out further processing to current initial blank for the finished product blank surface that obtains is smoother, receives the protection of outside cement thick liquids, and the inside of finished product blank is difficult to go into deeply water, and then has carried out intensity reinforcement improvement on the basis of having guaranteed the whole light characteristic of blank, and the heat preservation heat-proof quality of blank is good, and life is longer.
Description
Technical Field
The invention belongs to the technical field of concrete materials, and particularly relates to light foam concrete and a preparation method thereof.
Background
The lightweight foam concrete is one of a plurality of members in the lightweight concrete, is a variety with maximum sales capacity and development prospect in the four inorganic foam materials, is also called as the four inorganic foam materials, can be widely used in the highway engineering fields such as foundation abutment back filling, road expansion, mountain steep road section filling, old road abutment subgrade filling and the like, can also be used for soil covering and load reduction of an underground large-span structure, cavity filling and narrow space filling, and is widely applied to building roof slope finding, heat preservation, wall casting and the like.
The invention discloses a light heat-insulating composite foam concrete and a preparation method thereof, wherein the light heat-insulating composite foam concrete is prepared by firstly reacting polypropylene fibers with acrylic acid under the catalysis of benzoyl peroxide to prepare modified polypropylene fibers, then mixing graphene oxide with carboxyl carbon nano tubes, reacting with polyethylene polyamine to prepare modified graphene oxide gel, then mixing acrylic acid with acrylamide to prepare a substrate under the action of a catalyst, mixing the substrate with the modified graphene oxide gel for swelling, adding sodium bicarbonate, rotationally steaming for concentration, freeze-drying to prepare a composite foaming agent, finally mixing the composite foaming agent with cement, adding a coagulant, a waterproofing agent, fly ash, modified polypropylene fibers and sand, and stirring and mixing to obtain the light heat-insulating composite foam concrete. The light heat-insulating composite foam concrete prepared by the invention has smaller density and good heat-insulating performance, and the compressive strength is not much different from that of common foam concrete.
In the prior art, the light foam concrete is prepared by adding foaming agent foam into cement slurry, stirring the mixture by adding the foaming agent foam into a forming machine, so that the cement slurry and the foaming agent foam are fully mixed to form uniform fluid slurry, and then forming the slurry by using a forming die.
To this end, the present invention provides a lightweight foam concrete and a method of preparing the same.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved.
The technical scheme adopted for solving the technical problems is as follows: the invention relates to a light foam concrete which is prepared from the following raw materials in parts by weight:
20-30 parts of cement
75-80 parts of river sand
4-8 parts of fly ash
5-10 parts of water reducer
4-5 parts of foaming agent
40-50 parts of water
The water reducer is lignin sulfonate water reducer; the foaming agent is a compound foaming agent.
The preparation method of the light foam concrete is used for preparing the light foam concrete and comprises the following steps of:
s1: firstly, adding cement, river sand, fly ash, a water reducer and water into a forming machine, stirring to form cement slurry, simultaneously adding water into a foaming agent for dilution, and then stirring at a high speed to obtain foaming agent foam;
s2: dividing the obtained cement slurry into two parts, adding foaming agent foam into one part, and then rapidly stirring to prepare uniform fluid slurry;
s3: injecting the uniform fluid slurry obtained in the step S2 into a forming die, standing for forming, demolding to obtain an initial blank, then injecting cement slurry into the surface of the initial blank, uniformly coating a layer of cement slurry on the surface of the initial blank, and standing for curing at room temperature to obtain light foam concrete;
through carrying out further processing to current initial blank, pour one deck even cement thick liquids to the outside of initial blank, carry out trowelling to the surface of initial blank through cement thick liquids for the finished product blank surface that obtains is smoother, receives the protection of outside cement thick liquids, and the inside of finished product blank is difficult to go deep into water, and then has carried out intensity reinforcement improvement on the basis of having guaranteed the whole light characteristic of blank, and the heat preservation heat-proof quality of blank is good, and life is longer.
Preferably, the forming machine comprises a machine body, a stirring shaft and a conveying belt; a stirring groove is formed in the surface of the machine body; the number of the stirring tanks is two; the surface of the machine body is fixedly connected with a motor at the top of the stirring tank; the stirring shafts are rotationally connected to the inside of the stirring tank, and the stirring shafts are fixedly connected with the output shafts of the corresponding motors; the surface of the machine body is provided with a conveying groove; a conveying belt is arranged in the conveying groove; the surface of the conveying belt is provided with uniformly arranged forming dies; the top of the conveying groove is provided with evenly arranged injection holes, the injection holes are communicated with the inside of the stirring groove through pipelines, and control valves are arranged at the pipelines; during operation, the motor is controlled to rotate, the motor can drive the corresponding stirring shaft to rotate, the stirring shaft can stir slurry corresponding to the inside of the stirring tank, uniform fluid slurry and cement slurry are respectively prepared in the two stirring tanks, the conveying belt is started, the conveying belt can drive the forming dies with the surfaces uniformly arranged to move, the forming dies continuously move into the conveying tank of the machine body, the control valve is controlled, the slurry with the uniform fluid state is injected into the forming dies, then the forming dies are conveyed to a forming position for static storage, initial blanks are obtained, then the initial blanks are transferred into the larger forming dies, casting forming is carried out again, standing maintenance is carried out, finished blank is obtained, and the obtained light foam concrete is better in performance through the secondary forming method.
Preferably, foam boxes are arranged in the forming die; the top surface of the foam box is of an open structure design; during operation, through setting up the foam box in forming die's inside, at first with the inside of directly pouring into the foam box of even flow state's thick liquids, static shaping, then seal the foam box, put into the surface of conveyer belt with this forming die again, carry out the secondary pouring, the light foam concrete quality that obtains is lighter, and thermal-insulated heat preservation effect is better, and is more resistant to strike, is difficult to appear the fracture problem.
Preferably, the inner part of the foam box is fixedly connected with metal wires which are uniformly arranged, and the metal wires are designed into an interweaved net structure; during operation, through setting up the wire, can consolidate the foam box through the wire, the wire can increase the whole toughness of finished product blank simultaneously, when great to the blank size, can reduce the cracked risk of blank.
Preferably, the outer surface and the inner surface of the foam box are provided with connecting grooves which are uniformly arranged, and the end parts of the metal wires are positioned in the connecting grooves; during operation, through seting up the continuous groove at the surface of foam box, when pouring, the thick liquids of even flow state and cement thick liquids all can fully laminate between the foam box, and the inside of the thick liquids of even flow state and cement thick liquids is directly fused into to the wire simultaneously, has guaranteed that the finished product blank is inseparable overall structure.
Preferably, the surface of the conveying belt is provided with uniformly arranged vibrating grooves; a connecting plate is fixedly connected to the inside of the machine body at a position close to the conveying belt; the surface of the connecting plate is fixedly connected with an elastic sheet; the side surfaces of the elastic pieces, which are opposite to one side of the vibration groove, are respectively and rotatably connected with a vibration disc; during operation, through setting up the elastic sheet, when the conveyer belt operation, the elastic sheet can drive the surface of vibrations dish contact conveyer belt, because the vibration groove of evenly arranging is offered on the surface of conveyer belt, under the elastic action of elastic sheet, the tank bottom of vibration groove can be strikeed repeatedly to the vibrations dish for vibrations conveyer belt vibrations, the conveyer belt can drive forming die vibrations, promotes the inside thick liquids of even flow state of forming die and quick automatic leveling of cement thick liquids top surface.
Preferably, the number of the conveying belts is two; an electric push rod is fixedly connected between the two conveyor belts in the two machine bodies; the top of the electric push rod is fixedly connected with a push plate; the top surface of the push plate is fixedly connected with push rods which are uniformly arranged; the bottom surface of the forming die is provided with a moving groove at the ejector rod position; the inside of the moving groove is connected with a moving rod in a sliding manner; during operation, through setting up electric putter, electric putter can drive the push pedal motion, and the push pedal can drive the ejector pin motion for the ejector pin drives the foam box upward movement of its top position, makes the bottom of foam box be unsettled state, when carrying out cement thick liquids and pour, can guarantee that the bottom position of foam box has abundant pouring space.
Preferably, the top surfaces of the ejector rods are provided with guide holes, and the guide holes are communicated with a stirring tank for containing cement slurry through pipelines; the surfaces of the moving rods are provided with through holes; during operation, through seting up the guide hole on the surface of ejector pin, after the cement thick liquids is dry, when the in-process of ejector pin downwardly recovered, control cement thick liquids and lead into the guide hole, and then cement thick liquids can lead into the through-hole through the guide hole to pack the movable rod position through the through-hole.
Preferably, the surface of the moving rod is fixedly connected with a first air bag at a position close to the bottom surface of the moving rod; the side surface of the moving rod is fixedly connected with a second air bag close to the top surface of the moving rod, and the second air bag is communicated with the first air bag through a pipeline; the second air bag is of annular structural design; the surface of the second air bag is provided with an annular sheet; the annular sheet is of annular wavy structural design; the inner surface of the annular piece is fixedly connected with third air bags which are uniformly arranged; the annular piece is provided with small holes at the positions of the third air bags, and the small holes are communicated with the corresponding third air bags; during operation, through setting up first gasbag and second gasbag, when the carriage release lever downstream, the carriage release lever can stop to extrude first gasbag for the inside gas of second gasbag is led back to the inside of first gasbag, and then the second gasbag shrink, is favorable to the carriage release lever to break away from cement thick liquids and derive, and the second gasbag shrink can drive annular piece shrink simultaneously, and annular piece can extrude its inside third gasbag, makes aperture blowout gas, promotes the separation of annular piece and cement thick liquids.
The beneficial effects of the invention are as follows:
1. according to the lightweight foam concrete and the preparation method thereof, the existing initial blank is further processed, a layer of uniform cement slurry is poured outside the initial blank, the surface of the initial blank is smoothed through the cement slurry, the surface of the obtained finished blank is smoother, the finished blank is protected by the external cement slurry, the interior of the finished blank is not easy to be deeply immersed in water, further strength reinforcement improvement is carried out on the basis of guaranteeing the overall lightweight characteristic of the blank, the heat preservation and heat insulation performance of the blank is excellent, and the service life of the blank is longer.
2. The invention relates to a lightweight foam concrete and a preparation method thereof, wherein a foam box and a metal wire are arranged; firstly, the slurry in a uniform flow state is directly poured into the foam box for static molding, then the foam box is sealed, and then the molding die is put into the surface of the conveying belt for secondary pouring, so that the obtained light foam concrete has lighter weight, better heat insulation and heat preservation effect, is more impact-resistant and is less prone to fracture, meanwhile, the foam box can be reinforced by the metal wire, meanwhile, the whole toughness of a finished blank can be increased by the metal wire, and the fracture risk of the blank can be reduced when the size of the blank is larger.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a perspective view of the molding machine of the present invention;
FIG. 3 is a front view of the molding machine of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is an enlarged view of a portion of FIG. 4 at B;
FIG. 6 is an enlarged view of a portion of FIG. 5 at C;
FIG. 7 is a cross-sectional view of a travel bar of the present invention;
FIG. 8 is a partial enlarged view at D in FIG. 7;
in the figure: the machine body 1, a stirring shaft 2, a conveying belt 3, a motor 4, a forming die 5, a pouring hole 6, a foam box 7, a metal wire 8, a connecting groove 9, a vibrating groove 10, a connecting plate 11, an elastic sheet 12, a vibrating disc 13, an electric push rod 14, a push plate 15, a push rod 16, a moving rod 17, a guide hole 18, a through hole 19, a first air bag 20, a second air bag 21, an annular sheet 22, a third air bag 23 and a small hole 24.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1, a lightweight foam concrete is composed of the following raw materials in parts by weight:
20-30 parts of cement
75-80 parts of river sand
4-8 parts of fly ash
5-10 parts of water reducer
4-5 parts of foaming agent
40-50 parts of water
The water reducer is lignin sulfonate water reducer; the foaming agent is a compound foaming agent.
The preparation method of the light foam concrete is used for preparing the light foam concrete and comprises the following steps of:
s1: firstly, adding cement, river sand, fly ash, a water reducer and water into a forming machine, stirring to form cement slurry, simultaneously adding water into a foaming agent for dilution, and then stirring at a high speed to obtain foaming agent foam;
s2: dividing the obtained cement slurry into two parts, adding foaming agent foam into one part, and then rapidly stirring to prepare uniform fluid slurry;
s3: injecting the uniform fluid slurry obtained in the step S2 into a forming die 5, standing for forming, demolding to obtain an initial blank, then injecting cement slurry into the surface of the initial blank, uniformly coating a layer of cement slurry on the surface of the initial blank, and standing for curing at room temperature to obtain light foam concrete;
through carrying out further processing to current initial blank, pour one deck even cement thick liquids to the outside of initial blank, carry out trowelling to the surface of initial blank through cement thick liquids for the finished product blank surface that obtains is smoother, receives the protection of outside cement thick liquids, and the inside of finished product blank is difficult to go deep into water, and then has carried out intensity reinforcement improvement on the basis of having guaranteed the whole light characteristic of blank, and the heat preservation heat-proof quality of blank is good, and life is longer.
Example 1
As shown in fig. 2 to 4, the forming machine according to the embodiment of the invention comprises a machine body 1, a stirring shaft 2 and a conveying belt 3; a stirring groove is formed in the surface of the machine body 1; the number of the stirring tanks is two; the surface of the machine body 1 is fixedly connected with a motor 4 at the top of the stirring tank; the inside of the stirring tank is rotationally connected with a stirring shaft 2, and the stirring shaft 2 is fixedly connected with an output shaft of a corresponding motor 4; a conveying groove is formed in the surface of the machine body 1; a conveying belt 3 is arranged in the conveying groove; the surface of the conveying belt 3 is provided with uniformly arranged forming dies 5; the top of the conveying groove is provided with evenly arranged injection holes 6, the injection holes 6 are communicated with the inside of the stirring groove through pipelines, and control valves are arranged at the pipelines; during operation, the motor 4 is controlled to rotate, the motor 4 can drive the corresponding stirring shaft 2 to rotate, the stirring shaft 2 can stir slurry corresponding to the inside of the stirring grooves, uniform fluid slurry and cement slurry are respectively prepared in the two stirring grooves, the conveyer belt 3 is started, the conveyer belt 3 can drive the forming dies 5 with the surfaces uniformly arranged to move, the forming dies 5 continuously move into the conveying grooves of the machine body 1, the slurry in the uniform fluid state is injected into the forming dies 5 through the control valve, then the forming dies 5 are conveyed to a preparation position for static storage, an initial blank is obtained, then the initial blank is transferred into the larger forming dies 5, pouring molding is performed again, and the rest maintenance is performed to obtain a finished blank.
As shown in fig. 4 and 5, the inside of the molding die 5 is provided with a foam box 7; the top surface of the foam box 7 is of an open structure design; during operation, through setting up foam box 7 in the inside of forming die 5, at first with the inside of the direct pouring into foam box 7 of even flow state's thick liquids, static shaping, then seal foam box 7, put into the surface of conveyer belt 3 with this forming die 5 again, carry out the secondary pouring, the light foam concrete quality that obtains is lighter, and thermal-insulated heat preservation effect is better, and is more shock-resistant, is difficult to appear the fracture problem.
The foam box 7 is internally fixedly connected with metal wires 8 which are uniformly arranged, and the metal wires 8 are of an interweaved reticular structure design; during operation, through setting up wire 8, can consolidate foam box 7 through wire 8, wire 8 can increase the whole toughness of finished product blank simultaneously, when great to the blank size, can reduce the cracked risk of blank.
The outer surface and the inner surface of the foam box 7 are respectively provided with a connecting groove 9 which is uniformly arranged, and the end parts of the metal wires 8 are respectively positioned in the connecting grooves 9; during operation, through seting up continuous groove 9 at the surface of foam box 7, when pouring, the thick liquids of even flow state and cement thick liquids all can fully laminate between the foam box 7, and metal wire 8 directly fuses into the inside of the thick liquids of even flow state and cement thick liquids simultaneously, has guaranteed that the finished product blank is inseparable overall structure.
As shown in fig. 5, the surface of the conveying belt 3 is provided with uniformly arranged vibrating grooves 10; a connecting plate 11 is fixedly connected to the inside of the machine body 1 at a position close to the conveying belt 3; the surface of the connecting plate 11 is fixedly connected with an elastic sheet 12; the elastic piece 12 is rotatably connected with a vibration disk 13 relative to one side surface of the vibration groove 10; during operation, through setting up the elastic sheet 12, when conveyer belt 3 operation, the elastic sheet 12 can drive vibrations dish 13 contact conveyer belt 3's surface, because evenly arranged's vibrations groove 10 is offered on conveyer belt 3's surface, under the elastic action of elastic sheet 12, vibrations dish 13 can strike the tank bottom in vibrations groove 10 repeatedly for vibrations conveyer belt 3 vibrations, and conveyer belt 3 can drive forming die 5 vibrations, promotes forming die 5 inside even fluid state's thick liquids and cement thick liquids top surface to be quick automatic leveling.
As shown in fig. 4 to 6, the number of the conveyor belts 3 is two; an electric push rod 14 is fixedly connected between the two conveyor belts 3 in the two machine bodies 1; the top of the electric push rod 14 is fixedly connected with a push plate 15; the top surface of the push plate 15 is fixedly connected with push rods 16 which are uniformly arranged; the bottom surface of the forming die 5 is provided with a moving groove at the position of the ejector rod 16; the inside of the moving groove is connected with a moving rod 17 in a sliding way; during operation, through setting up electric putter 14, electric putter 14 can drive push pedal 15 motion, and push pedal 15 can drive ejector pin 16 motion for ejector pin 16 drives the foam box 7 of its top position and upwards moves, makes the bottom of foam box 7 be unsettled state, when carrying out cement thick liquids and pour, can guarantee that the bottom position of foam box 7 has abundant pouring space.
As shown in fig. 5, the top surfaces of the ejector rods 16 are provided with guide holes 18, and the guide holes 18 are communicated with the stirring tank for holding the cement slurry through a pipeline; the surfaces of the movable rods 17 are provided with through holes 19; in operation, through the guide hole 18 formed in the surface of the ejector rod 16, after the cement slurry is dried, the guide hole 18 is controlled to be introduced with the cement slurry in the downward recovery process of the ejector rod 16, and then the cement slurry is introduced into the through hole 19 through the guide hole 18, and the position of the movable rod 17 is filled through the through hole 19.
Example two
As shown in fig. 6-8, comparative example one, in which another embodiment of the present invention is: the surface of the movable rod 17 is fixedly connected with a first air bag 20 at a position close to the bottom surface of the movable rod 17; the side surface of the moving rod 17 is fixedly connected with a second air bag 21 near the top surface of the moving rod 17, and the second air bag 21 and the first air bag 20 are communicated with each other through a pipeline; the second air bag 21 is designed in a ring-shaped structure; the surface of the second air bag 21 is provided with an annular sheet 22; the annular piece 22 is of annular wavy structural design; the inner surface of the annular piece 22 is fixedly connected with third air bags 23 which are uniformly arranged; the annular piece 22 is provided with small holes 24 at the positions of the third air bags 23, and the small holes 24 are communicated with the corresponding third air bags 23; when the movable rod 17 moves downwards, the movable rod 17 stops extruding the first air bag 20, so that air in the second air bag 21 is led back into the first air bag 20, the second air bag 21 is contracted, the movable rod 17 is beneficial to separating from cement slurry and guiding out, meanwhile, the second air bag 21 is contracted to drive the annular piece 22 to contract, the annular piece 22 can extrude the third air bag 23 in the annular piece, the small hole 24 sprays air, and the annular piece 22 is promoted to be separated from the cement slurry.
When the light foam concrete works, the motor 4 is controlled to rotate, the motor 4 drives the corresponding stirring shaft 2 to rotate, the stirring shaft 2 stirs slurry in the corresponding stirring tanks, so that uniform fluid slurry and cement slurry are respectively prepared in the two stirring tanks, the conveyer belt 3 is started, the conveyer belt 3 drives the forming dies 5 with the surfaces uniformly arranged to move, the forming dies 5 continuously move into the conveying tanks of the machine body 1, the slurry with the uniform fluid state is injected into the forming dies 5 through the control valve, then the forming dies 5 are conveyed to a preparation position for static storage, an initial blank is obtained, then the initial blank is transferred into the larger forming dies 5, pouring molding is performed again, and the rest maintenance is performed to obtain a finished blank; through setting up the foam box 7 in the inside of forming die 5, at first pour into the inside of the foam box 7 with the thick liquids of even flow state, static shaping, then seal the foam box 7, put this forming die 5 into the surface of the conveyer belt 3, carry on the secondary pouring, the light foam concrete quality obtained is lighter, the thermal-insulated heat-preserving effect is better, and is more impact-resistant, difficult to appear breaking problem; by arranging the metal wires 8, the foam box 7 can be reinforced through the metal wires 8, meanwhile, the metal wires 8 can increase the overall toughness of the finished blank, and when the size of the blank is larger, the risk of blank fracture can be reduced; through arranging the connecting grooves 9 on the surface of the foam box 7, when pouring is carried out, the uniform-flow-state slurry and the cement slurry can be fully attached to the foam box 7, and meanwhile, the metal wires 8 are directly fused into the uniform-flow-state slurry and the cement slurry, so that the finished blank is ensured to be in a compact integral structure; by arranging the elastic sheet 12, when the conveyer belt 3 runs, the elastic sheet 12 can drive the vibration disc 13 to contact the surface of the conveyer belt 3, and as the surface of the conveyer belt 3 is provided with uniformly arranged vibration grooves 10, the vibration disc 13 can repeatedly strike the bottom of the vibration grooves 10 under the elastic action of the elastic sheet 12, so that the vibration conveyer belt 3 vibrates, the conveyer belt 3 can drive the forming die 5 to vibrate, and the uniform flow state slurry inside the forming die 5 and the top surface of the cement slurry are promoted to be quickly and automatically flattened; by arranging the electric push rod 14, the electric push rod 14 can drive the push plate 15 to move, the push plate 15 can drive the push rod 16 to move, so that the push rod 16 drives the foam box 7 at the top position of the push rod to move upwards, the bottom of the foam box 7 is in a suspended state, and when cement slurry pouring is carried out, the bottom position of the foam box 7 can be ensured to have a sufficient pouring space; through arranging the guide hole 18 on the surface of the ejector rod 16, after the cement slurry is dried, controlling the cement slurry to be guided into the guide hole 18 in the process of downwards recycling the ejector rod 16, and then guiding the cement slurry into the through hole 19 through the guide hole 18, and filling the position of the movable rod 17 through the through hole 19; through setting up first gasbag 20 and second gasbag 21, when carriage release lever 17 moves down, carriage release lever 17 can stop to extrude first gasbag 20 for the inside gas of second gasbag 21 is led back to the inside of first gasbag 20, and then second gasbag 21 shrink, is favorable to carriage release lever 17 to break away from cement thick liquids and export, and second gasbag 21 shrink can drive ring piece 22 shrink simultaneously, and ring piece 22 can extrude its inside third gasbag 23, makes aperture 24 blowout gas, promotes the separation of ring piece 22 and cement thick liquids.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A preparation method of light foam concrete is characterized in that: the light foam concrete consists of the following raw materials in parts by weight:
20-30 parts of cement
75-80 parts of river sand
4-8 parts of fly ash
5-10 parts of water reducer
4-5 parts of foaming agent
40-50 parts of water
The water reducer is lignin sulfonate water reducer; the foaming agent is a compound foaming agent;
a method for preparing light foam concrete, which comprises the following steps:
s1: firstly, adding cement, river sand, fly ash, a water reducer and water into a forming machine, stirring to form cement slurry, simultaneously adding water into a foaming agent for dilution, and then stirring at a high speed to obtain foaming agent foam;
s2: dividing the obtained cement slurry into two parts, adding foaming agent foam into one part, and then rapidly stirring to prepare uniform fluid slurry;
s3: injecting the uniform fluid slurry obtained in the step S2 into a forming die (5), standing for forming, demolding to obtain an initial blank, then injecting cement slurry into the surface of the initial blank, uniformly coating a layer of cement slurry on the surface of the initial blank, and standing for curing at room temperature to obtain light foam concrete;
the forming machine comprises a machine body (1), a stirring shaft (2) and a conveying belt (3); a stirring groove is formed in the surface of the machine body (1); the number of the stirring tanks is two; the surface of the machine body (1) is fixedly connected with a motor (4) at the top of the stirring tank; the inside of the stirring tank is rotationally connected with a stirring shaft (2), and the stirring shaft (2) is fixedly connected with an output shaft of a corresponding motor (4); a conveying groove is formed in the surface of the machine body (1); a conveying belt (3) is arranged in the conveying groove; the surface of the conveying belt (3) is provided with uniformly arranged forming dies (5); the top of the conveying groove is provided with evenly arranged injection holes (6), the injection holes (6) are communicated with the inside of the stirring groove through pipelines, and control valves are arranged at the pipelines; vibration grooves (10) which are uniformly distributed are formed in the surface of the conveying belt (3); a connecting plate (11) is fixedly connected to the inside of the machine body (1) at a position close to the conveying belt (3); the surface of the connecting plate (11) is fixedly connected with an elastic sheet (12); the elastic sheets (12) are respectively and rotatably connected with a vibration disc (13) relative to one side surface of the vibration groove (10); the number of the conveying belts (3) is two; an electric push rod (14) is fixedly connected between the two conveyor belts (3) in the two machine bodies (1); the top of the electric push rod (14) is fixedly connected with a push plate (15); the top surface of the push plate (15) is fixedly connected with push rods (16) which are uniformly arranged; the bottom surface of the forming die (5) is provided with a moving groove at the position of the ejector rod (16); a moving rod (17) is connected inside the moving groove in a sliding manner;
foam boxes (7) are arranged in the forming die (5); the top surface of the foam box (7) is of an open structure design;
the foam box (7) is internally fixedly connected with metal wires (8) which are uniformly arranged, and the metal wires (8) are of an interweaved reticular structure design;
the outer surface and the inner surface of the foam box (7) are provided with connecting grooves (9) which are uniformly arranged, and the ends of the metal wires (8) are positioned in the connecting grooves (9).
2. The method for preparing the lightweight foam concrete according to claim 1, wherein the method comprises the following steps: the top surfaces of the ejector rods (16) are provided with guide holes (18), and the guide holes (18) are communicated with a stirring tank for containing cement slurry through pipelines; through holes (19) are formed in the surfaces of the moving rods (17).
3. The method for preparing the lightweight foam concrete according to claim 2, wherein the method comprises the following steps: the surface of the moving rod (17) is fixedly connected with a first air bag (20) at a position close to the bottom surface of the moving rod (17); the side surface of the moving rod (17) is fixedly connected with a second air bag (21) close to the top surface of the moving rod (17), and the second air bag (21) and the first air bag (20) are communicated with each other through a pipeline; the second air bag (21) is of annular structural design; the surface of the second air bag (21) is provided with an annular sheet (22); the annular piece (22) is of annular wavy structural design; the inner surface of the annular piece (22) is fixedly connected with third air bags (23) which are uniformly arranged; the annular sheets (22) are provided with small holes (24) at the positions of the third air bags (23), and the small holes (24) are communicated with the corresponding third air bags (23).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210044094.7A CN114292063B (en) | 2022-01-14 | 2022-01-14 | Lightweight foam concrete and preparation method thereof |
| CN202211366814.8A CN115745659A (en) | 2022-01-14 | 2022-01-14 | Preparation method of light foam concrete |
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| CN102936936B (en) * | 2012-11-27 | 2015-01-14 | 中国建筑股份有限公司 | Decoration and heat preservation integrated light-weight concrete plate and production method thereof |
| CN103467130B (en) * | 2013-08-29 | 2014-12-31 | 昆山生态屋建筑技术有限公司 | Fabrication technology for foam concrete crust member |
| CN207292492U (en) * | 2017-09-08 | 2018-05-01 | 焦文娟 | Homogeneous oscillation device is used in a kind of bottled powder medicine production |
| CN109822734B (en) * | 2019-02-28 | 2020-06-23 | 河海大学常州校区 | Foam concrete preparation facilities based on automatic flow production line |
| CN113232159B (en) * | 2021-04-20 | 2022-09-13 | 广东丰业电力器材有限公司 | Commercial concrete mixing and conveying integrated system |
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