CN113072333A - Preparation process of high-strength closed heat-insulation concrete block - Google Patents
Preparation process of high-strength closed heat-insulation concrete block Download PDFInfo
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- CN113072333A CN113072333A CN202110020823.0A CN202110020823A CN113072333A CN 113072333 A CN113072333 A CN 113072333A CN 202110020823 A CN202110020823 A CN 202110020823A CN 113072333 A CN113072333 A CN 113072333A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/02—Selection of the hardening environment
- C04B40/024—Steam hardening, e.g. in an autoclave
- C04B40/0245—Steam hardening, e.g. in an autoclave including a pre-curing step not involving a steam or autoclave treatment
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
- E04C1/41—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts composed of insulating material and load-bearing concrete, stone or stone-like material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/24—Structural elements or technologies for improving thermal insulation
- Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
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Abstract
The invention discloses a preparation process of a high-strength closed heat-insulating concrete block, which belongs to the technical field of building construction, and can be characterized in that a plurality of seepage-proofing balls which are uniformly distributed are pre-embedded at a construction joint, the caulking action of the seepage-proofing balls is triggered by a magnetic field after the wall body is integrally formed, the seepage-proofing balls are extended to pores at the construction joint by the traction of magnetic guiding microspheres, when water permeates to the inside, the fiber pipes convey the water to the inside of the seepage-proofing balls, and trigger chemical reaction in the triggering balls to generate a large amount of gas, under the guiding action of magnetic force, the magnetic plugging particles migrate to the pores along with the gas, on one hand, continuously permeated water is blown out, on the other hand, the magnetic plugging particles obviously expand to plug after absorbing the water, the gas pressure is increased until the isolating ball shell is propped, and a curing material is forced to migrate to the pores to trigger the curing action under the extrusion action, the high-strength permanent plugging is realized, and the seepage can be effectively prevented, so that the construction quality of the retaining wall is indirectly improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a preparation process of a high-strength closed heat-insulation concrete building block.
Background
Concrete: refers to the general name of engineering composite materials formed by cementing aggregate into a whole by cementing materials. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called as common concrete, is obtained by mixing with water (which may contain additives and admixtures) according to a certain proportion and stirring, and is widely applied to civil engineering.
The concrete self-heat-insulation composite building block is a multi-row hole building block which is formed by coarse and fine aggregate, cementing material, fly ash, additive, water and the like through a building block forming machine, meets the requirements of heat insulation performance and does not need heat insulation treatment, or is formed by compounding the concrete mixing material and a high-efficiency heat insulation material (compounding for one time and compounding for two times), has the advantages of meeting the requirements of building mechanical property and heat insulation performance, does not need heat insulation treatment again, and has the same service life as a building.
According to different heat transfer coefficient requirements of the external enclosure walls of the buildings in the south and north, the thickness of the polyphenyl plate can be increased or reduced, and industrial production is realized. The building built by the building blocks can not only reach the specified building energy-saving standard, but also overcome the defects of external wall cracking, external heat insulation layer falling, poor heat insulation layer durability and the like of the existing external wall external heat insulation. The heat preservation composite building block is suitable for heat preservation in winter in the north and heat insulation in summer in the south, and has wide regional adaptability. Concrete self-insulating composite load-bearing blocks have been used in bottom buildings, multi-storey concrete small block buildings and reinforced small block buildings. The concrete self-heat-insulation composite load-bearing building block has the characteristics of integration of heat insulation and load bearing, same service life of heat insulation materials and buildings and the like, and has wide market prospect.
Although the existing heat-insulating concrete block has good heat-insulating property compared with the common concrete block, the existing heat-insulating concrete block has certain defects due to the characteristic of open pores, the heat-insulating property is slightly reduced and the requirement cannot be met in a special area due to the poor seepage-proofing property, and in addition, the strength of the concrete block is low due to the porosity of the concrete block, so that the concrete block cannot play a good bearing role, and the application of the heat-insulating concrete block is undoubtedly and 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 preparation process of a high-strength closed type heat-preservation concrete block, which can change the traditional air entraining mode, trigger the pore-forming action of the air entraining microspheres by heating when the concrete is not completely condensed by pre-burying the air entraining microspheres and the magnetic foam spheres, lead the air entraining agent in the air entraining microspheres to be heated and decomposed to release a large amount of gas for expansion, lead the blocked gelatin coating sleeve to be dissolved after being contacted with residual hot water in the concrete, lead the migration microspheres to form pores in the concrete and migrate to the surface under the action of increased air pressure, lead the residual gas to still form dense micro pores in the concrete after carrying magnetic anti-crack fibers to form main pores so as not to penetrate the concrete, trigger the secondary curing action after the migration microspheres reach the surface and contact with supplemented moisture, the main pores are closed, and the magnetic anti-crack fibers are reserved in the pores for reinforcement, so that good heat insulation performance and seepage resistance can be realized, and the strength of the concrete block is improved.
2. Technical scheme
In order to solve the above problems, the present invention adopts the following technical solutions.
A preparation process of a high-strength closed heat-insulation concrete block comprises the following steps:
s1, preparing corresponding raw materials, including the following raw materials in parts by weight: 500 parts of cement 250-containing materials, 750 parts of ceramsite 300-containing materials, 50-200 parts of fly ash, 800 parts of sand 400-containing materials, 150 parts of water 120-containing materials, 1-3 parts of polycarboxylic acid water reducing agent, 50-200 parts of air-entraining microspheres, 20-50 parts of hydrophobic white carbon black and 10-20 parts of magnetic foam balls, and uniformly stirring to prepare a concrete raw material;
s2, pouring the concrete raw material into a mold, uniformly vibrating, closing the mold for 2-3h, heating the mold to 50-60 ℃ after the raw material is slightly cured, triggering the air-entraining action of the air-entraining microspheres, and immediately stopping heating;
s3, supplementing water into the mold, forcing the water to diffuse along the inner wall of the mold, triggering the secondary curing action of the surface of the raw material, and standing for 4-6 h;
s4, transferring the mold into a steam curing pool for steam curing, taking out the mold after the steam curing is finished, opening the mold, taking out the product, and sprinkling water in a cool and ventilated place for natural curing;
and S5, finishing and polishing the product after the maintenance is finished, and then stacking and warehousing.
Furthermore, the air entraining microspheres comprise heat insulating spheres, a plurality of uniformly distributed gelatin coating sleeves are connected to the outer ends of the heat insulating spheres in an embedded manner, migration microspheres are inserted into the gelatin coating sleeves, a plurality of elastic air bags corresponding to the migration microspheres are connected to the inner ends of the heat insulating spheres, air entraining agents are filled in the elastic air bags, the migration microspheres are wrapped by the gelatin coating sleeves in a normal state so as to block the elastic air bags, the air entraining agents react to release a large amount of gas after being heated, the air pressure starts to increase, meanwhile, the residual water in the concrete is changed into hot water to start to dissolve the gelatin coating sleeves, the positioning effect on the migration microspheres is lost after the gelatin coating sleeves are gradually dissolved, the migration microspheres are pushed to perform concentrated pore forming in the concrete under the action of the air pressure, and the redundant gas is diffused all around to form tiny pores.
Further, the air entraining agent is powdered ammonium bicarbonate, still fill in the elasticity gasbag and have the anti fibre of magnetic crack of mixing with the air entraining agent, ammonium bicarbonate can all decompose into gas after the heating, is collected easily and avoids remaining in the concrete, and the anti fibre of magnetic crack can be followed gas and released in step to under the adsorption of magnetic foam ball, insert the interior pipeline of pore and reinforce.
Furthermore, the magnetic anti-crack fiber comprises a main fiber part and a pair of magnetic end parts, the pair of magnetic end parts are connected to two ends of the main fiber part, the main fiber part and the magnetic end parts are integrally connected, but the two ends are obtained by soaking nano magnetic solution and drying, and can be matched with the magnetic foam ball to perform cuttage on the pore channel, so that the reinforcing effect is achieved.
Further, the migration microballon includes heat preservation hemisphere and water absorption hemisphere, and symmetrical connection between heat preservation hemisphere and the water absorption hemisphere, water-swelling rubber block that water-swelling rubber block and water absorption hemisphere are connected is equipped with in water absorption hemisphere the inner, it has the shutoff powder to fill between water-swelling rubber block and the water absorption hemisphere, heat preservation hemisphere outer end covers has the frictional layer, and the effect of preliminary shutoff is played to the heat preservation hemisphere, avoids gaseous leakage too fast, and the frictional layer utilizes frictional force to fix a position the migration microsphere is whole, is absorbed by the water absorption hemisphere behind the external water supply, forces the synchronous inflation of water absorption hemisphere through extrusion shutoff powder after the water-swelling rubber block water absorption inflation, forms tight shutoff, forms the permanent shutoff of high strength after the shutoff powder water absorption effect solidification simultaneously.
Furthermore, the heat-preservation hemisphere is made of hard heat-preservation materials, the water-absorption hemisphere is made of water-absorption materials, and the plugging powder is a mixture of a curing material, an expansion material and a low-thermal-conductivity-coefficient material.
Furthermore, the curing material is at least one of sulfonated oil, epoxy resin and modified water glass, the expansion material is at least one of starch grafted acrylic acid, cellulose grafted acrylic acid and protein grafted copolymer, the low-thermal-conductivity-coefficient material is any one of aerogel powder and silicon carbide, and the mixing mass ratio of the curing material, the expansion material and the low-thermal-conductivity-coefficient material is 10:1:1, so that the main pore channel can be effectively plugged, and the seepage resistance and the heat preservation performance are improved.
Further, the magnetic foam ball is obtained by wrapping magnetic powder with hollow polystyrene foam particles.
Further, the water supplement amount in the step S3 is 0.2-0.5% of the total weight of the raw materials.
Further, in the step S4, the temperature is increased to 75-80 ℃ at the speed of 25 ℃/h through steam curing, the temperature is kept for 6-8 h, and then the temperature is reduced 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 change the traditional air-entraining mode, and through the mode of pre-embedding the air-entraining microspheres and the magnetic foam balls, when the concrete is not completely condensed, the pore-forming action of the air-entraining microspheres is triggered by heating, the air-entraining agent in the air-entraining microspheres is thermally decomposed to release a large amount of gas for expansion, the gelatin coating sleeve for plugging is dissolved after being contacted with the residual hot water in the concrete, under the action of increased air pressure, the gas pushes the migration microspheres to form pores in the concrete and migrate to the surface, after the magnetic anti-crack fibers are carried to form a plurality of main pores, the residual gas can still form dense micro pores in the concrete so as not to penetrate the concrete, the secondary curing action is triggered after the migration microspheres reach the surface and are contacted with supplemented moisture, the main pores are closed, and the magnetic anti-crack fibers are reserved in the pores for reinforcement, can realize good heat preservation performance and anti-seepage performance and simultaneously improve the strength of the concrete block.
(2) The air entraining microspheres comprise a heat-insulating sphere, the outer end of the heat-insulating sphere is connected with a plurality of uniformly distributed gelatin coating sleeves in an embedded manner, migration microspheres are inserted into the gelatin coating sleeves, the inner end of the heat-insulating sphere is connected with a plurality of elastic air bags corresponding to the migration microspheres, the elastic air bags are filled with air entraining agents, the gelatin coating sleeves wrap the migration microspheres in a normal state so as to seal the elastic air bags, the air entraining agents react to release a large amount of gas after being heated, the air pressure begins to increase, meanwhile, the residual water in the concrete is changed into hot water to begin to dissolve the gelatin coating sleeves, the positioning effect on the migration microspheres is lost after the gelatin coating sleeves are gradually dissolved, the migration microspheres are pushed to be concentrated in the concrete under the effect of the air pressure, and redundant gas diffuses to the periphery to form tiny pores.
(3) The air entraining agent is powdery ammonium bicarbonate, the elastic air bag is filled with magnetic anti-cracking fibers mixed with the air entraining agent, the ammonium bicarbonate can be completely decomposed into gas after being heated, the gas is easily collected and prevented from remaining in concrete, the magnetic anti-cracking fibers can be released along with the gas synchronously, and the magnetic anti-cracking fibers are inserted into the pore channel to reinforce the pore channel under the adsorption effect of the magnetic foam balls.
(4) The magnetic anti-crack fiber comprises a main fiber part and a pair of magnetic end parts, the pair of magnetic end parts are connected to two ends of the main fiber part, the main fiber part and the magnetic end parts are integrally connected, but the two ends are obtained by soaking nano magnetic solution and drying, and the magnetic anti-crack fiber can be matched with a magnetic foam ball to perform cuttage on a pore channel, so that the reinforcing effect is achieved.
(5) The migration microballon includes heat preservation hemisphere and water absorption hemisphere, and symmetrical connection between heat preservation hemisphere and the water absorption hemisphere, water-swelling rubber piece of being connected with the heat preservation hemisphere is equipped with in water absorption hemisphere the inner, it has the shutoff powder to fill between water-swelling rubber piece and the water absorption hemisphere, heat preservation hemisphere outer end covers there is the frictional layer, the effect of preliminary shutoff is played to the heat preservation hemisphere, avoid gas to leak out too fast, the frictional layer utilizes frictional force to fix a position the migration microballon is whole, be absorbed by the water absorption hemisphere behind the external water supply, water-swelling rubber piece water absorption inflation back forces the synchronous inflation of water absorption hemisphere through extrusion shutoff powder, form tight shutoff, form the permanent shutoff of high strength after the shutoff powder water absorption effect solidifies simultaneously.
(6) The curing material is at least one of sulfonated oil, epoxy resin and modified water glass, the expansion material is at least one of starch grafted acrylic acid, cellulose grafted acrylic acid and protein grafted copolymer, the low-thermal conductivity coefficient material is any one of aerogel powder and silicon carbide, and the mixing mass ratio of the curing material, the expansion material and the low-thermal conductivity coefficient material is 10:1:1, so that the main pore channel can be effectively plugged, and the seepage resistance and the heat preservation are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of air-entraining microspheres of the present invention;
FIG. 3 is a cross-sectional view of air-entraining microspheres of the present invention;
FIG. 4 is a schematic structural view of a migrating microsphere of the present invention;
fig. 5 is a schematic structural view of the magnetic crack resistant fiber of the present invention.
The reference numbers in the figures illustrate:
1 heat insulation ball body, 2 gelatin coating sleeve, 3 migration microsphere, 31 heat preservation hemisphere, 32 water absorption hemisphere, 33 friction layer, 34 water swelling rubber block, 35 plugging powder, 4 elastic air bag, 5 magnetic anti-crack fiber, 51 main fiber part and 52 magnetic end part.
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 process for preparing a high-strength closed thermal insulation concrete block includes the following steps:
s1, preparing corresponding raw materials, including the following raw materials in parts by weight: 250 parts of cement, 300 parts of ceramsite, 50 parts of fly ash, 400 parts of sand, 120 parts of water, 1 part of polycarboxylic acid water reducing agent, 50 parts of air-entraining microsphere, 20 parts of hydrophobic white carbon black and 10 parts of magnetic foam ball, and uniformly stirring to prepare a concrete raw material;
s2, pouring the concrete raw material into a mold, uniformly vibrating, closing the mold for 2 hours, heating the mold to 50 ℃ after the raw material is slightly cured, triggering the air-entraining action of the air-entraining microspheres, and immediately stopping heating;
s3, supplementing water into the mold, forcing the water to diffuse along the inner wall of the mold, triggering the secondary curing action of the surface of the raw material, and standing for 4 hours;
s4, transferring the mold into a steam curing pool for steam curing, taking out the mold after the steam curing is finished, opening the mold, taking out the product, and sprinkling water in a cool and ventilated place for natural curing;
and S5, finishing and polishing the product after the maintenance is finished, and then stacking and warehousing.
Referring to fig. 2-3, the air-entraining microsphere includes a heat-insulating sphere 1, a plurality of gelatin coating sleeves 2 which are uniformly distributed are embedded and connected at the outer end of the heat-insulating sphere 1, migration microspheres 3 are inserted into the gelatin coating sleeves 2, a plurality of elastic air bags 4 corresponding to the migration microspheres 3 are connected at the inner end of the heat-insulating sphere 1, an air-entraining agent is filled in the elastic air bags 4, the migration microspheres 3 are wrapped by the gelatin coating sleeves 2 in a normal state to plug the elastic air bags 4, after being heated, the air entraining agent reacts to release a large amount of gas, the air pressure begins to increase, meanwhile, the residual moisture in the concrete is changed into hot water to begin to dissolve the gelatin coating sleeve 2, after the gelatin coating sleeve 2 is gradually dissolved, the positioning effect on the migration microspheres 3 is lost, the migration microspheres 3 are pushed to perform concentrated pore forming in concrete under the action of air pressure, and redundant air is diffused to the periphery to form tiny pores.
The air entraining agent is powdery ammonium bicarbonate, the magnetic anti-cracking fibers 5 mixed with the air entraining agent are filled in the elastic air bag 4, the ammonium bicarbonate can be completely decomposed into gas after being heated, the gas is easily collected and prevented from remaining in concrete, the magnetic anti-cracking fibers 5 can be released synchronously along with the gas, and the air entraining agent is inserted into the pore channel to reinforce the pore channel under the adsorption effect of the magnetic foam balls.
Referring to fig. 5, the magnetic anti-crack fiber 5 includes a main fiber portion 51 and a pair of magnetic end portions 52, the pair of magnetic end portions 52 are connected to two ends of the main fiber portion 51, the main fiber portion 51 and the magnetic end portions 52 are integrally connected, but the two ends are obtained by soaking in a nano magnetic solution and drying, and can be used for cutting a duct in cooperation with a magnetic foam ball, thereby playing a role in reinforcement.
Referring to fig. 4, the migration microsphere 3 includes a thermal insulation hemisphere 31 and a water absorption hemisphere 32, the thermal insulation hemisphere 31 and the water absorption hemisphere 32 are symmetrically connected, a water-swellable rubber block 34 connected to the thermal insulation hemisphere 31 is disposed at the inner end of the water absorption hemisphere 32, a blocking powder 35 is filled between the water-swellable rubber block 34 and the water absorption hemisphere 32, a friction layer 33 covers the outer end of the thermal insulation hemisphere 31, the thermal insulation hemisphere 31 plays a role of primary blocking to prevent gas from leaking out too fast, the friction layer 33 positions the migration microsphere 3 as a whole by using friction force, the blocking powder is absorbed by the water absorption hemisphere 32 after external water supplement, the water-swellable rubber block 34 forces the water absorption hemisphere 32 to expand synchronously by squeezing the blocking powder 35 after water swelling, tight blocking is formed, and the blocking powder 35 forms a high-strength permanent blocking after water absorption and curing.
The heat preservation hemisphere 31 is made of hard heat preservation materials, the water absorption hemisphere 32 is made of water absorption materials, and the plugging powder 35 is a mixture of curing materials, expansion materials and low-heat-conductivity-coefficient materials.
The curing material is at least one of sulfonated oil, epoxy resin and modified water glass, the expansion material is at least one of starch grafted acrylic acid, cellulose grafted acrylic acid and protein grafted copolymer, the low-thermal conductivity coefficient material is any one of aerogel powder and silicon carbide, and the mixing mass ratio of the curing material, the expansion material and the low-thermal conductivity coefficient material is 10:1:1, so that the main pore channel can be effectively plugged, and the seepage resistance and the heat preservation are improved.
The magnetic foam ball is obtained by wrapping magnetic powder with hollow polystyrene foam particles.
In step S3, the water supplement amount is 0.2% of the total weight of the raw materials.
In the step S4, the temperature is raised to 75 ℃ at the speed of 25 ℃/h, the temperature is kept for 6h, and then the temperature is lowered to the room temperature within 1 h.
Example 2:
a preparation process of a high-strength closed heat-insulation concrete block comprises the following steps:
s1, preparing corresponding raw materials, including the following raw materials in parts by weight: 400 parts of cement, 450 parts of ceramsite, 120 parts of fly ash, 600 parts of sand, 135 parts of water, 2 parts of polycarboxylic acid water reducing agent, 120 parts of air-entraining microsphere, 35 parts of hydrophobic white carbon black and 15 parts of magnetic foam ball, and uniformly stirring to prepare a concrete raw material;
s2, pouring the concrete raw material into a mold, uniformly vibrating, closing the mold for 2.5 hours, heating the mold to 55 ℃ after the raw material is slightly cured, triggering the air-entraining action of the air-entraining microspheres, and immediately stopping heating;
s3, supplementing water into the mold, forcing the water to diffuse along the inner wall of the mold, triggering the secondary curing action of the surface of the raw material, and standing for 5 hours;
s4, transferring the mold into a steam curing pool for steam curing, taking out the mold after the steam curing is finished, opening the mold, taking out the product, and sprinkling water in a cool and ventilated place for natural curing;
and S5, finishing and polishing the product after the maintenance is finished, and then stacking and warehousing.
In step S3, the water supplement amount is 0.4% of the total weight of the raw materials.
In the step S4, steam curing is firstly carried out to raise the temperature to 78 ℃ at the speed of 25 ℃/h, the temperature is kept for 7h, and then the temperature is reduced to room temperature within 1 h.
The remainder was in accordance with example 1.
Example 3:
a preparation process of a high-strength closed heat-insulation concrete block comprises the following steps:
s1, preparing corresponding raw materials, including the following raw materials in parts by weight: 500 parts of cement, 750 parts of ceramsite, 200 parts of fly ash, 800 parts of sand, 150 parts of water, 3 parts of polycarboxylic acid water reducing agent, 200 parts of air-entraining microsphere, 50 parts of hydrophobic white carbon black and 20 parts of magnetic foam ball, and uniformly stirring to prepare a concrete raw material;
s2, pouring the concrete raw material into a mold, uniformly vibrating, closing the mold for 3 hours, heating the mold to 60 ℃ after the raw material is slightly cured, triggering the air-entraining action of the air-entraining microspheres, and immediately stopping heating;
s3, supplementing water into the mold, forcing the water to diffuse along the inner wall of the mold, triggering the secondary curing action of the surface of the raw material, and standing for 6 hours;
s4, transferring the mold into a steam curing pool for steam curing, taking out the mold after the steam curing is finished, opening the mold, taking out the product, and sprinkling water in a cool and ventilated place for natural curing;
and S5, finishing and polishing the product after the maintenance is finished, and then stacking and warehousing.
In step S3, the water supplement amount is 0.5% of the total weight of the raw materials.
In the step S4, steam curing is firstly carried out to raise the temperature to 80 ℃ at the speed of 25 ℃/h, the temperature is kept for 8h, and then the temperature is reduced to room temperature within 1 h.
The remainder was in accordance with example 1.
The invention can change the traditional air-entraining mode, through the mode of pre-embedding the air-entraining microspheres and the magnetic foam balls, when the concrete is not completely condensed, the pore-forming action of the air-entraining microspheres is triggered by heating, the air-entraining agent in the air-entraining microspheres is heated and decomposed to release a large amount of gas for expansion, simultaneously the gelatin coating sleeve 2 for plugging is dissolved after contacting with the residual hot water in the concrete, under the action of increased air pressure, the gas pushes the migration microspheres 3 to form pores in the concrete and migrate to the surface, after the magnetic anti-crack fibers 5 are carried to form a plurality of main pores, the residual gas can still form dense micro pores in the concrete so as not to penetrate the concrete, after the migration microspheres 3 reach the surface and contact with supplemented water, the secondary curing action is triggered to close the main pores, and meanwhile, the magnetic anti-crack fibers 5 are reserved in the pores for reinforcement, can realize good heat preservation performance and anti-seepage performance and simultaneously improve the strength of the concrete block.
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 (10)
1. A preparation process of a high-strength closed heat-insulation concrete block is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing corresponding raw materials, including the following raw materials in parts by weight: 500 parts of cement 250-containing materials, 750 parts of ceramsite 300-containing materials, 50-200 parts of fly ash, 800 parts of sand 400-containing materials, 150 parts of water 120-containing materials, 1-3 parts of polycarboxylic acid water reducing agent, 50-200 parts of air-entraining microspheres, 20-50 parts of hydrophobic white carbon black and 10-20 parts of magnetic foam balls, and uniformly stirring to prepare a concrete raw material;
s2, pouring the concrete raw material into a mold, uniformly vibrating, closing the mold for 2-3h, heating the mold to 50-60 ℃ after the raw material is slightly cured, triggering the air-entraining action of the air-entraining microspheres, and immediately stopping heating;
s3, supplementing water into the mold, forcing the water to diffuse along the inner wall of the mold, triggering the secondary curing action of the surface of the raw material, and standing for 4-6 h;
s4, transferring the mold into a steam curing pool for steam curing, taking out the mold after the steam curing is finished, opening the mold, taking out the product, and sprinkling water in a cool and ventilated place for natural curing;
and S5, finishing and polishing the product after the maintenance is finished, and then stacking and warehousing.
2. The preparation process of the high-strength closed heat-insulating concrete block according to claim 1, which is characterized in that: the air entraining microsphere comprises a heat insulation sphere (1), a plurality of uniformly distributed gelatin coating sleeves (2) are embedded and connected at the outer end of the heat insulation sphere (1), migration microspheres (3) are inserted into the gelatin coating sleeves (2), a plurality of elastic air bags (4) corresponding to the migration microspheres (3) are connected at the inner end of the heat insulation sphere (1), and an air entraining agent is filled in the elastic air bags (4).
3. The preparation process of the high-strength closed heat-insulating concrete block according to claim 2, which is characterized in that: the air entraining agent is powdery ammonium bicarbonate, and the elastic air bag (4) is filled with magnetic anti-cracking fibers (5) mixed with the air entraining agent.
4. The preparation process of the high-strength closed heat-insulating concrete block according to claim 3, characterized by comprising the following steps: the magnetic anti-crack fiber (5) comprises a main fiber part (51) and a pair of magnetic end parts (52), and the pair of magnetic end parts (52) are connected to two ends of the main fiber part (51).
5. The preparation process of the high-strength closed heat-insulating concrete block according to claim 2, which is characterized in that: migrating microspheres (3) including heat preservation hemisphere (31) and water absorption hemisphere (32), and symmetrical connection between heat preservation hemisphere (31) and the water absorption hemisphere (32), water absorption hemisphere (32) the inner is equipped with meets water inflation rubber block (34) be connected with heat preservation hemisphere (31), it has shutoff powder (35) to meet the packing between water inflation rubber block (34) and water absorption hemisphere (32), heat preservation hemisphere (31) outer end covers has frictional layer (33).
6. The preparation process of the high-strength closed heat-insulating concrete block according to claim 5, characterized by comprising the following steps: the heat-preservation hemisphere (31) is made of hard heat-preservation materials, the water-absorption hemisphere (32) is made of water-absorption materials, and the plugging powder (35) is a mixture of a curing material, an expansion material and a low-heat-conductivity-coefficient material.
7. The preparation process of the high-strength closed heat-insulating concrete block according to claim 6, which is characterized in that: the curing material is at least one of sulfonated oil, epoxy resin and modified water glass, the expansion material is at least one of starch grafted acrylic acid, cellulose grafted acrylic acid and protein grafted copolymer, the low-thermal-conductivity-coefficient material is any one of aerogel powder and silicon carbide, and the mixing mass ratio of the curing material to the expansion material to the low-thermal-conductivity-coefficient material is 10:1: 1.
8. The preparation process of the high-strength closed heat-insulating concrete block according to claim 1, which is characterized in that: the magnetic foam ball is obtained by wrapping magnetic powder with hollow polystyrene foam particles.
9. The preparation process of the high-strength closed heat-insulating concrete block according to claim 1, which is characterized in that: the water supplement amount in the step S3 is 0.2-0.5% of the total weight of the raw materials.
10. The preparation process of the high-strength closed heat-insulating concrete block according to claim 1, which is characterized in that: in the step S4, the temperature is increased to 75-80 ℃ at the 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.
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| CN202110020823.0A CN113072333A (en) | 2021-01-08 | 2021-01-08 | Preparation process of high-strength closed heat-insulation concrete block |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510835A (en) * | 2021-07-31 | 2021-10-19 | 艾上沭阳新材料科技有限公司 | High-compactness concrete product molding method |
| CN113832001A (en) * | 2021-08-13 | 2021-12-24 | 王伟波 | Dynamic fermentation method of organic feed |
-
2021
- 2021-01-08 CN CN202110020823.0A patent/CN113072333A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113510835A (en) * | 2021-07-31 | 2021-10-19 | 艾上沭阳新材料科技有限公司 | High-compactness concrete product molding method |
| CN113510835B (en) * | 2021-07-31 | 2021-12-24 | 艾上沭阳新材料科技有限公司 | High-compactness concrete product molding method |
| CN113832001A (en) * | 2021-08-13 | 2021-12-24 | 王伟波 | Dynamic fermentation method of organic feed |
| CN113832001B (en) * | 2021-08-13 | 2024-01-12 | 北京世纪牧名饲料技术研究所 | Dynamic fermentation method of organic feed |
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Application publication date: 20210706 |