CN113510835B

CN113510835B - High-compactness concrete product molding method

Info

Publication number: CN113510835B
Application number: CN202110877368.6A
Authority: CN
Inventors: 张志松; 褚静
Original assignee: Ai Shangshuyang New Material Technology Co ltd
Current assignee: Ai Shangshuyang New Material Technology Co ltd
Priority date: 2021-07-31
Filing date: 2021-07-31
Publication date: 2021-12-24
Anticipated expiration: 2041-07-31
Also published as: CN113510835A

Abstract

The invention discloses a method for forming a high-compactness concrete product, which belongs to the technical field of concrete product production, can partially replace recycled aggregate by introducing a compaction-assisting ball, has good strength, simultaneously triggers degassing action by using a hydration heat phenomenon in the pouring process of a mixture, ensures that a wax bag in a degassing groove on the surface of the compaction-assisting ball is melted and then is connected with a suction water bag through a gas-dissolving bag, ensures that soluble gas in the gas-dissolving bag is quickly dissolved in water, ensures that the pressure in the degassing groove is reduced because the gas-dissolving bag starts to quickly shrink, leads residual air to be guided into the degassing groove by an air-leading fiber pipe to balance the pressure, leads a preset cooling layer to start to contact and dissolve after the soluble gas is completely dissolved, absorbs a large amount of heat, and forces the melted wax bag to be solidified and blocked in a designated area, avoid the air secondary to leak, can realize the effective degasification to the mixture to improve the closely knit degree after the concrete product shaping.

Description

High-compactness concrete product molding method

Technical Field

The invention relates to the technical field of concrete product production, in particular to a high-compactness concrete product molding method.

Background

Concrete products are products made of concrete (including mortar) as a basic material, are generally prefabricated by factories and then are transported to construction sites for laying or installation; for large or heavy articles, due to the inconvenience of transportation, they can also be prefabricated on site. With or without reinforcement, such as concrete pipes, reinforced concrete poles, reinforced concrete piles, reinforced concrete sleepers, prestressed concrete bridges, reinforced concrete mine supports, etc. The method is widely applied to the departments of building, traffic, water conservancy, agriculture, electric power, mining and the like.

Mainly have concrete masonry material module (41 kinds of products of 3), aerated concrete block, the solid brick of concrete, the porous brick of concrete, environmental protection ventilative permeable pavement brick, the blue brick modelled after an antique, building heat preservation integration module, prevent inspection well lid more, two layers of well lids, the antiskid is marked time, safe rainwater well grate, linear drainage U-shaped groove (narrow grate inlet for stom water), light foaming soil, road anticollision citron head, four prevent exclusion closing cap, rainwater utilization, the concrete link plate, the concrete floor, the concrete brick, building rubbish is recycled, sludge treatment utilizes, source secondary retrieval and utilization water storage drainage device etc..

In order to meet the concept of environmental protection and sustainable development, most concrete products are produced by recycling recycled aggregates at present, but because the processability is low, the formed concrete products have low compactness and insufficient strength, and the application range of the concrete products is greatly limited.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a high-compactness concrete product molding method which can partially replace recycled aggregate by improving raw materials and introducing a compaction-assisting ball in the production process, has good strength, utilizes the phenomenon of hydration heat to trigger degassing action in the pouring process of a mixture, melts a wax bag in a degassing groove on the surface of the compaction-assisting ball and then establishes connection with a suction water bag through the gas bag, soluble gas in the gas bag is rapidly dissolved in water, the gas bag rapidly shrinks to reduce the pressure in the degassing groove, conducts gas introduction in the mixture through a gas introduction fiber pipe, guides residual air into the degassing groove to balance the pressure, and starts to contact and dissolve through a preset temperature reduction layer after the soluble gas is completely dissolved, and absorbs a large amount of heat, the melted wax bag is forced to be solidified in a designated area to realize plugging, secondary air leakage is avoided, effective degassing of the mixture can be realized, and the compactness of the concrete product after molding is improved.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A method for molding a concrete product with high compactness comprises the following steps:

s1, manually sorting the recycled concrete materials, and crushing the available materials obtained by sorting;

s2, carrying out secondary screening on the crushed raw materials to obtain usable recycled aggregate, and mixing the recycled aggregate with lightweight aggregate to obtain composite aggregate;

s3, weighing the following raw materials in parts by weight: 30-40 parts of composite aggregate, 10-15 parts of cementing material, 0.05-0.5 part of water reducing agent, 0.02-0.2 part of retarder, 0.01-0.1 part of early strength agent and 4-8 parts of water;

s4, putting the raw materials into a stirrer, uniformly stirring to obtain a mixture, pouring the mixture into a concrete product mold, and putting a proper amount of compaction assisting balls;

s5, vibrating the mixture in the mold, applying a magnetic field to guide the compaction-assisting balls to migrate and degas in the mixture after the vibration is finished, and transporting the mixture to a curing kiln for curing after the mixture is molded;

and S6, after the maintenance is finished, removing the mold and taking out the product, and stacking and storing the product in a product yard.

Further, the recycled aggregate in the step S2 has a particle size of 5-10mm, and the lightweight aggregate is artificial ceramsite with a particle size of 3-5 mm.

Further, the cementing material in the step S3 is obtained by mixing cement, fly ash and mineral powder in a mass ratio of 6-8:1-3:1-3, the water reducing agent is a polycarboxylic acid water reducing agent, the retarder is a glucose retarder, and the early strength agent is a triethanolamine early strength agent.

Further, the cement is 42.5-grade or 52.5-grade portland cement, the fly ash is II-grade or above II-grade fly ash, and the mineral powder is S95 or above S95-grade mineral powder.

Further, the compaction assisting ball in step S4 includes a skeleton magnetic ball and a plurality of air-entraining fiber tubes, wherein a plurality of uniformly distributed degassing grooves are formed on an outer surface of the skeleton magnetic ball, a shape fixing plate is connected to a notch of the degassing groove, a waterproof breathable film covers an outer end of the shape fixing plate, an air-aspirating water drum is connected to the degassing groove, a wax bag covers an outer end of the air-aspirating water drum, a plurality of uniformly distributed air-dissolving bags are connected to an outer end of the wax bag, the skeleton magnetic ball can serve as aggregate to reinforce the concrete product and provide residual air in the space absorption mixture, the air-entraining fiber tubes play a role of entraining air, the shape fixing plate is used to perform basic shape fixing on the waterproof breathable film, so that the waterproof breathable film is prevented from contracting inwards to balance air pressure when the air pressure in the degassing groove is reduced, thereby causing degassing failure, and the wax bag plays a role of isolating the air-dissolving bag from the air-aspirating water drum in a normal state, the wax bag can be melted at a certain temperature, at the moment, the air dissolving bag is close to the air suction water bag under the action of elasticity and establishes connection, the air in the air dissolving bag begins to dissolve and also begins to shrink, the air pressure in the degassing groove is forced to be reduced, and therefore the reduced air pressure is balanced by means of air-entraining of the air-entraining fiber pipe.

Furthermore, a plurality of uniformly distributed air suction holes are formed in the shaping plate and correspond to the air entraining fiber tubes one by one, a plugging bag is arranged in each air suction hole, a wax flowing tube is connected between the plugging bag and the wax bag, the plugging bag does not interfere with the air entraining action of the air entraining fiber tubes in a normal state, and the plugging bag is continuously contracted and extruded along with the continuous dissolution of gas in the air dissolving bag, so that wax liquid in the wax bag enters the plugging bag from the wax flowing tube to fill the plugging bag until the wax liquid expands to plug the air suction holes.

Furthermore, the dissolved air bag comprises an elastic air bag, a cooling layer, a plurality of elastic drawn wires and a trigger needle tube, the elastic air bag is connected to the outer end of the wax bag, the trigger needle tube is connected between the elastic air bag and the wax bag, the elastic drawn wires are connected between the outer end of the cooling layer and the air suction water bag, soluble gas is filled in the elastic air bag, the cooling layer is connected to the top end of the inner part of the elastic air bag, the trigger needle tube can actively penetrate into the air suction water bag under the elastic action of the elastic drawn wires after the blocking effect of the wax bag is lost, the soluble gas in the elastic air bag can enter the air suction water bag to be dissolved until the cooling layer is finally contacted with water in the air suction water bag, at the moment, the degassing effect of the degassing groove disappears, and the cooling layer absorbs a large amount of heat when dissolved, so that the expanded plugging bag is actively forced to be solidified and permanently plug the air suction hole, the air absorbed in the degassing tank is not easy to leak, thereby indirectly improving the degassing effect.

Furthermore, the soluble gas is a gas which is easy to dissolve in water, the cooling layer is made of saltpeter, the gas which is easy to dissolve in water is a gas substance with high solubility in water, and the saltpeter absorbs a large amount of heat when being dissolved in water, so that the ambient temperature is reduced, and then the expanded plugging bag is forced to be solidified.

Furthermore, skeleton magnetic ball and shape setting board all adopt ferromagnetic material to make, help closely knit ball's external diameter is 8-10mm, can migrate in the mixture under the magnetic field effect to enlarge the degasification scope and improve dynamic degassing effect, help closely knit ball's size and regeneration aggregate are unanimous basically simultaneously, can act as partial regeneration aggregate and fill the effect of strengthening.

Further, in the step S5, steam curing is performed in a curing kiln, wherein the steam curing mode is that after standing for 4-6h, the temperature is raised to 75-80 ℃ at a speed of 25 ℃/h, the temperature is kept for 6-8 h, and then the temperature is lowered to the room temperature within 1 h.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme can improve raw materials, and partially replace recycled aggregate in a production process by introducing a mode of a compaction-assisting ball, the compaction-assisting ball has good strength, simultaneously, in a mixture pouring process, hydration heat is utilized to trigger degassing action, a dissolved air bag is connected with a suction water bag after a wax bag in a degassing groove on the surface of the compaction-assisting ball is melted, soluble gas in the dissolved air bag is rapidly dissolved in water, meanwhile, the dissolved air bag rapidly shrinks to reduce the pressure in the degassing groove, air is introduced in the mixture by virtue of an air introducing fiber pipe, residual air is introduced into the degassing groove to balance air pressure, the soluble gas is completely dissolved and then begins to contact and dissolve from a preset cooling layer, a large amount of heat is absorbed, the melted wax bag is forced to solidify in a designated area to realize blocking, and secondary air leakage is avoided, can realize effective degassing of the mixture, thereby improving the compactness of the molded concrete product.

(2) The compaction assisting ball comprises a framework magnetic ball and a plurality of air-entraining fiber pipes, a plurality of uniformly distributed air-entraining grooves are formed in the outer surface of the framework magnetic ball, a shaping plate is connected to the groove opening of the air-entraining groove, the outer end of the shaping plate is covered with a waterproof air-permeable film, the air-entraining fiber pipes are connected in the air-entraining groove, the outer end of the air-entraining water-permeable film is covered with a wax bag, the outer end of the wax bag is connected with a plurality of uniformly distributed air-dissolving bags, the framework magnetic ball can serve as aggregate to reinforce concrete products and provide residual air in a space absorption mixture, the air-entraining fiber pipes play a role of entraining air, the shaping plate is used for carrying out basic shaping on the waterproof air-permeable film, the phenomenon that the waterproof air-permeable film shrinks inwards to balance air pressure when the air pressure in the air-entraining groove is reduced is avoided, so that air-entraining failure is caused, the wax bag plays a role of isolating the air-dissolving bags and the air-entraining water bags in a normal state, the wax bags are melted at a certain temperature, at the moment, the air-dissolving bags are close to the air-entraining water-entraining bags and establish connection by virtue of elasticity, the gas in the gas dissolving bag begins to dissolve and also begins to shrink, so that the air pressure in the degassing groove is reduced, and the reduced air pressure is balanced by the air-entraining of the air-entraining fiber pipe.

(3) The wax liquid in the wax bag enters the plugging bag from the flowing wax pipe to fill the plugging bag until expanding to plug the air suction hole.

(4) The air dissolving bag comprises an elastic air bag, a cooling layer, a plurality of elastic drawn wires and a trigger needle tube, the elastic air bag is connected to the outer end of the wax bag, the trigger needle tube is connected between the elastic air bag and the wax bag, the elastic drawn wires are connected between the outer end of the cooling layer and the air suction water bag, the elastic air bag is filled with soluble gas, the cooling layer is connected to the top end of the inner part of the elastic air bag, the trigger needle tube can actively penetrate into the air suction water bag under the elastic action of the elastic drawn wires to establish connection after losing the blocking action of the wax bag, the soluble gas in the elastic air bag can enter the air suction water bag to be dissolved until the cooling layer is finally contacted with the water in the air suction water bag, at the moment, the degassing effect of the degassing groove disappears, and as the cooling layer absorbs a large amount of heat when being dissolved, the expanded plugging bag is actively forced to be solidified and permanently plug the air suction hole, and the air absorbed in the degassing groove is not easy to leak out, thereby indirectly improving the degassing effect.

(5) The soluble gas is gas which is easy to dissolve in water, the cooling layer is made of saltpeter, the gas which is easy to dissolve in water is gas substance with high solubility in water, and the saltpeter absorbs a large amount of heat when being dissolved in water, so that the ambient temperature is reduced, and then the expanded plugging bag is forced to be solidified.

(6) Skeleton magnetic ball and shape setting board all adopt ferromagnetic material to make, and the external diameter of helping closely knit ball is 8-10mm, can migrate in the mixture under the magnetic field effect to enlarge the degasification scope and improve dynamic degassing effect, help closely knit ball's size and regeneration aggregate basic unanimity simultaneously, can act as partial regeneration aggregate and fill the effect of strengthening.

Drawings

FIG. 1 is a schematic structural view of a portion of a concrete-reinforced article according to the present invention;

FIG. 2 is a schematic structural diagram of a compaction-assisting ball according to the present invention;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic structural view of the air bag of the present invention before and after partial change;

figure 5 is a structural schematic diagram of a part of the plugging bag of the invention.

The reference numbers in the figures illustrate:

1 compaction assisting ball, 11 skeleton magnetic balls, 12 air-entraining fiber tubes, 2 waterproof breathable films, 3 shaping plates, 4 air dissolving bags, 41 elastic air bags, 42 cooling layers, 43 elastic drawing wires, 44 trigger needle tubes, 5 wax bags, 6 air-breathing water bags, 7 flow wax tubes and 8 plugging bags.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1, a method for forming a concrete product with high compactness includes the following steps:

s3, weighing the following raw materials in parts by weight: 30 parts of composite aggregate, 10 parts of cementing material, 0.05 part of water reducing agent, 0.02 part of retarder, 0.01 part of early strength agent and 4 parts of water;

s4, putting the raw materials into a stirrer, uniformly stirring to obtain a mixture, pouring the mixture into a concrete product mold, and putting a proper amount of compaction assisting balls 1;

s5, vibrating the mixture in the mold, guiding the compaction assisting balls 1 to migrate and degas in the mixture by applying a magnetic field outside after the stirring is finished, transporting the mixture to a curing kiln for curing after the mixture is formed, and performing steam curing in the curing kiln, wherein the steam curing mode is that the mixture is firstly stood for 4 hours, then the temperature is raised to 75 ℃ at a speed of 25 ℃/h, the temperature is kept for 6 hours, and then the temperature is lowered to the room temperature within 1 hour;

The recycled aggregate in the step S2 has a particle size of 5-10mm, and the lightweight aggregate is artificial ceramsite with a particle size of 3-5 mm.

The cementing material in the step S3 is obtained by mixing cement, fly ash and mineral powder in a mass ratio of 6:1:1, wherein the water reducing agent is a polycarboxylic acid water reducing agent, the retarder is a glucose retarder, and the early strength agent is a triethanolamine early strength agent.

The cement is 42.5-grade or 52.5-grade portland cement, the fly ash is II-grade or above II-grade fly ash, and the mineral powder is S95 or above S95-grade mineral powder.

Referring to fig. 2-3, the compaction assisting ball 1 in step S4 includes a skeleton magnetic ball 11 and a plurality of air-entraining fiber tubes 12, wherein a plurality of uniformly distributed deaeration grooves are formed on an outer surface of the skeleton magnetic ball 11, a shaping plate 3 is connected to a groove opening of the deaeration grooves, an outer end of the shaping plate 3 is covered with a waterproof air-permeable membrane 2, an air-aspirating water bag 6 is connected to the deaeration grooves, an outer end of the air-aspirating water bag 6 is covered with a wax bag 5, an outer end of the wax bag 5 is connected with a plurality of uniformly distributed air-dissolving bags 4, the skeleton magnetic ball 11 can serve as an aggregate to reinforce concrete products, and simultaneously provide air remained in a space absorption mixture, the air-entraining fiber tubes 12 play a role of entraining air, the shaping plate 3 is used for carrying out basic shaping on the waterproof air-permeable membrane 2 to avoid that the waterproof air-permeable membrane 2 contracts inwards to balance air pressure when the air pressure in the deaeration grooves is reduced, thereby causing degassing failure, and the wax bag 5 plays a role of isolating the air-entraining bag 4 from the air-aspirating water bag 6 in a normal state, at a certain temperature, the wax bag 5 is melted, at the moment, the air dissolving bag 4 is close to the air suction water bag 6 under the action of elasticity and establishes connection, the air in the air dissolving bag 4 begins to dissolve and also begins to shrink, the air pressure in the degassing tank is forced to be reduced, and therefore the air is guided by the air guiding fiber pipe 12 to balance the reduced air pressure.

Referring to fig. 5, a plurality of uniformly distributed air suction holes are formed in the shaping plate 3, the air suction holes correspond to the air-entraining fiber tubes 12 one by one, plugging bags 8 are arranged in the air suction holes, a wax flow tube 7 is connected between the plugging bags 8 and the wax bag 5, the plugging bags 8 do not interfere with the air-entraining action of the air-entraining fiber tubes 12 in a normal state, and along with the continuous dissolution of the gas in the gas dissolving bag 4, the plugging bags are continuously contracted and extruded by the plugging bags 5, so that the wax liquid in the wax bag 5 enters the plugging bags 8 from the wax flow tube 7 to be filled until the wax liquid expands to plug the air suction holes.

Referring to fig. 4, the air dissolving bag 4 includes an elastic air bag 41, a temperature reducing layer 42, a plurality of elastic drawn wires 43 and a trigger needle tube 44, the elastic air bag 41 is connected to the outer end of the wax bag 5, the trigger needle tube 44 is connected between the elastic air bag 41 and the wax bag 5, the elastic drawn wires 43 are connected between the outer end of the temperature reducing layer 42 and the air suction water bag 6, the elastic air bag 41 is filled with soluble gas, the temperature reducing layer 42 is connected to the inner top end of the elastic air bag 41, the trigger needle tube 44 will actively penetrate into the air suction water bag 6 under the elastic force of the elastic drawn wires 43 after losing the blocking effect of the wax bag 5 and establish connection, the soluble gas in the elastic air bag 41 will enter the air suction water bag 6 to dissolve until the temperature reducing layer 42 finally contacts with the water in the air suction water bag 6, at this time, it represents that the degassing function of the degassing tank disappears, and the expanded plugging bag 8 is actively forced to solidify and plug the permanent air suction hole due to the large amount of heat absorbed when the temperature reducing layer 42 dissolves, the air absorbed in the degassing tank is not easy to leak, thereby indirectly improving the degassing effect.

The soluble gas is gas which is easy to dissolve in water, the cooling layer 42 is made of saltpeter, the gas which is easy to dissolve in water is gas substance which is high in solubility in water, and the saltpeter absorbs a large amount of heat when being dissolved in water, so that the ambient temperature is reduced, and then the expanded plugging bag 8 is forced to be solidified.

Skeleton magnetic ball 11 and shape setting board 3 all adopt ferromagnetic material to make, and the external diameter of helping closely knit ball 1 is 8-10mm, can migrate in the mixture under the magnetic field effect to enlarge the degasification scope and improve dynamic degassing effect, help closely knit ball 1's size and regeneration aggregate basic unanimity simultaneously, can act as partial regeneration aggregate and fill the effect of strengthening.

Example 2:

s3, weighing the following raw materials in parts by weight: 35 parts of composite aggregate, 12 parts of cementing material, 0.3 part of water reducing agent, 0.1 part of retarder, 0.05 part of early strength agent and 6 parts of water;

s5, vibrating the mixture in the mold, guiding the compaction assisting balls 1 to migrate and degas in the mixture by applying a magnetic field outside after the stirring is finished, transporting the mixture to a curing kiln for curing after the mixture is formed, and performing steam curing in the curing kiln, wherein the steam curing mode is that the mixture is firstly stood for 5 hours, then the temperature is raised to 80 ℃ at a speed of 25 ℃/h, the temperature is kept for 7 hours, and then the temperature is lowered to the room temperature within 1 hour;

The remainder was in accordance with example 1.

Example 3:

s3, weighing the following raw materials in parts by weight: 40 parts of composite aggregate, 15 parts of cementing material, 0.5 part of water reducing agent, 0.2 part of retarder, 0.1 part of early strength agent and 8 parts of water;

s5, vibrating the mixture in the mold, guiding the compaction assisting balls 1 to migrate and degas in the mixture by applying a magnetic field outside after the stirring is finished, transporting the mixture to a curing kiln for curing after the mixture is formed, and performing steam curing in the curing kiln, wherein the steam curing mode is that the mixture is firstly stood for 6 hours, then the temperature is raised to 80 ℃ at a speed of 25 ℃/h, the temperature is kept for 68 hours, and then the temperature is lowered to the room temperature within 1 hour;

The remainder was in accordance with example 1.

The invention can improve the raw materials, partially replace recycled aggregate by introducing the compaction-assisting ball 1 in the production process, has good strength, simultaneously triggers the degassing action by utilizing the hydration heat phenomenon in the pouring process of the mixture, establishes connection between the air-dissolving bag 4 and the air-sucking water bag 6 after the wax bag 5 in the degassing groove on the surface of the compaction-assisting ball 1 is melted, quickly dissolves the soluble gas in the air-dissolving bag 4 in water, simultaneously leads the air pressure in the degassing groove to be reduced as the air-dissolving bag 4 starts to quickly shrink, leads the air in the mixture by the air-leading fiber pipe 12, leads the residual air to the degassing groove to balance the air pressure, starts to contact and dissolve by the preset cooling layer 42 after the soluble gas is completely dissolved, absorbs a large amount of heat, forces the melted wax bag 5 to be solidified and blocked in a designated area, and avoids secondary air leakage, can realize effective degassing of the mixture, thereby improving the compactness of the molded concrete product.

The above are merely preferred embodiments of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.

Claims

1. A method for molding a concrete product with high compactness is characterized by comprising the following steps: the method comprises the following steps:

s4, putting the raw materials into a stirrer, uniformly stirring to obtain a mixture, pouring the mixture into a concrete product mold, and putting a proper amount of compaction assisting balls (1);

s5, vibrating the mixture in the mold, applying a magnetic field to guide the compaction assisting balls (1) to migrate and degas in the mixture after the vibration is finished, and transporting the mixture to a curing kiln for curing after the mixture is formed;

s6, after the maintenance is finished, removing the mold and taking out the product, and stacking and storing the product in a product yard;

the compaction assisting ball (1) in the step S4 comprises a framework magnetic ball (11) and a plurality of air-entraining fiber pipes (12), wherein a plurality of uniformly distributed degassing grooves are formed in the outer surface of the framework magnetic ball (11), a notch of each degassing groove is connected with a fixed plate (3), the outer end of each fixed plate (3) is covered with a waterproof breathable film (2), a gas suction water bag (6) is connected in each degassing groove, a wax bag (5) is covered at the outer end of each gas suction water bag (6), and a plurality of uniformly distributed gas dissolving bags (4) are connected at the outer end of each wax bag (5);

a plurality of uniformly distributed air suction holes are formed in the shaping plate (3), the air suction holes correspond to the air entraining fiber tubes (12) one by one, a plugging bag (8) is arranged in each air suction hole, and a wax flowing tube (7) is connected between the plugging bag (8) and the wax bag (5);

the gas dissolving bag (4) comprises an elastic gas bag (41), a cooling layer (42), a plurality of elastic drawn wires (43) and a trigger needle tube (44), the elastic gas bag (41) is connected to the outer end of the wax bag (5), the trigger needle tube (44) is connected between the elastic gas bag (41) and the wax bag (5), the elastic drawn wires (43) are connected between the outer end of the cooling layer (42) and the air suction water bag (6), the elastic gas bag (41) is filled with soluble gas, and the cooling layer (42) is connected to the inner top end of the elastic gas bag (41);

the soluble gas is gas which is easy to dissolve in water, and the cooling layer (42) is made of saltpeter.

2. A high compactness concrete product forming method according to claim 1, characterized in that: the recycled aggregate in the step S2 has a particle size of 5-10mm, and the lightweight aggregate is artificial ceramsite with a particle size of 3-5 mm.

3. A high compactness concrete product forming method according to claim 1, characterized in that: the cementing material in the step S3 is obtained by mixing cement, fly ash and mineral powder in a mass ratio of 6-8:1-3:1-3, the water reducing agent is a polycarboxylic acid water reducing agent, the retarder is a glucose retarder, and the early strength agent is a triethanolamine early strength agent.

4. A high compactness concrete product forming method according to claim 3, characterized in that: the cement is 42.5-grade or 52.5-grade portland cement, the fly ash is more than II-grade fly ash, and the mineral powder is more than S95-grade mineral powder.

5. A high compactness concrete product forming method according to claim 1, characterized in that: the framework magnetic ball (11) and the shaping plate (3) are both made of ferromagnetic materials, and the outer diameter of the compaction assisting ball (1) is 8-10 mm.

6. A high compactness concrete product forming method according to claim 1, characterized in that: and step S5, performing steam curing in a curing kiln, wherein the steam curing mode is that standing is performed for 4-6h, then the temperature is raised to 75-80 ℃ at a speed of 25 ℃/h, the temperature is kept for 6-8 h, and then the temperature is reduced to the room temperature within 1 h.