CN108238752B - Heat storage concrete based on super absorbent resin and preparation method thereof - Google Patents
Heat storage concrete based on super absorbent resin and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/10—Liquid materials
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to a high water-absorbent resin-based heat storage concrete and a preparation method thereof, wherein the high water-absorbent resin-based heat storage concrete is prepared from a cementing material, pre-absorbent high water-absorbent resin particles, fine aggregates, a heat-conducting medium, fibers and water, and the dosage of each raw material is as follows: the super absorbent resin particles with pre-water absorption account for 50 to 200 percent of the using amount of the cementing material, the fine aggregate accounts for 0 to 150 percent of the using amount of the cementing material, the heat conducting medium accounts for 0.01 to 2 percent of the using amount of the cementing material, the fiber accounts for 0.1 to 1 percent of the using amount of the cementing material, and the water accounts for 30 to 50 percent of the using amount of the cementing material. The invention utilizes the super-water-absorption and high-efficiency water-holding performance of the super-water-absorption resin to use the pre-water-absorption super-water-absorption resin particles for preparing the heat storage concrete, and the surface of the concrete is sealed to prevent the internal water from losing. The water content of the concrete is higher than that of common concrete, and the contained water is used as a heat storage medium to realize the heat storage function of the concrete.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to heat storage concrete and a preparation method thereof.
Background
The heat storage concrete can absorb and store heat energy input from the outside, and then transmits the heat energy outwards in a radiation mode to maintain the indoor temperature, so that the aims of improving the living comfort of the building and reducing the energy consumption are fulfilled. The research on heat storage building materials began in the 80's of the 20 th century, and mainly used phase change materials to process building materials (such as gypsum boards, wall boards, concrete members and the like) or introduce phase change materials into concrete in a composite form, so that the heat storage/energy storage function of the building materials is realized, and the indoor temperature can be kept stable. However, the phase-change heat storage concrete technology has some problems which restrict the wide application of the technology. For example: the phase-change material has high cost, and raw materials are not easy to obtain; the phase change temperature point is higher, and the heat storage is limited; the phase change material is difficult to package, and the introduction process is complex; phase change materials can reduce the strength of the matrix material; and the durability problems that the thermophysical properties of the phase-change material are degraded in the circulation process, the phase-change material is easy to leak from the matrix, and the like.
In the above problems of the phase-change heat storage concrete, the development of a concrete with a high specific heat capacity and a non-phase-change medium is one of the important means for improving the heat storage efficiency of the heat storage concrete and promoting the practical application of the heat storage concrete. Water is the most easily available and cheap substance with high specific heat capacity in nature, the specific heat capacity is 4.2 kJ/(kg DEG C.), and the specific heat of most building materials is lower than 1 kJ/(kg DEG C.). If the water content in the concrete is increased, the specific heat capacity of the concrete is correspondingly increased, but when the concrete is formed, if the water-cement ratio is too large, the problems of segregation, bleeding and the like can be caused, the strength of a cement matrix can be reduced, and after the cement is solidified and hardened, the internal water is consumed by the hydration of the cement, the excessive water can be dissipated, pores are formed in cement stones, and the purpose of increasing the specific heat of the concrete by increasing the water content can not be achieved. How to introduce more water into the concrete without reducing the strength of the matrix material is the key point for solving the problem.
The super absorbent resin has super absorbent capacity and high-efficiency water retention performance, and if the super absorbent resin is used for preparing concrete, the water content of the concrete can be improved without reducing the working performance of the concrete. At present, many patents and reports exist for doping super absorbent resin into concrete, but the used super absorbent resin is mostly in powder form, and mainly plays a role in internal curing in the concrete, so that the water content of the concrete cannot be improved. Chinese patent "a water-absorbing expansion resin aggregate concrete and its preparation method" (CN 103332902A), have adopted the spherical super absorbent resin granule, the main purpose is through controlling the particle size of this super absorbent resin granule, prepare a concrete that the internal pore structure can be regulated and controlled, this concrete density is small, the intensity is high, the spherical super absorbent resin of pre-absorption introduced plays pore-forming and internal curing effects, but the super absorbent resin granule can lose water and shrink finally, thus form a large amount of regular spherical cavities inside the concrete. Therefore, the concrete has low water content and low heat conductivity coefficient, and cannot achieve the effect of internal heat storage.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art and provides the heat storage concrete based on the super absorbent resin and the preparation method thereof, the concrete has the advantages of low cost, simple preparation operation, large specific heat capacity, high heat storage efficiency and the like, is particularly suitable for a mortar cover layer of an electrothermal tube heating type floor heating, and can obviously improve the heat storage efficiency and the continuous heat release time of the floor heating.
The technical scheme adopted by the invention for solving the problems is as follows: a high water-absorbent resin-based heat storage concrete is prepared from a cementing material, pre-absorbent high water-absorbent resin particles, fine aggregates, a heat-conducting medium, fibers and water, wherein the dosage of each raw material is as follows: the super absorbent resin particles with pre-water absorption account for 50 to 200 percent of the using amount of the cementing material, the fine aggregate accounts for 0 to 150 percent of the using amount of the cementing material, the heat conducting medium accounts for 0.01 to 2 percent of the using amount of the cementing material, the fiber accounts for 0.1 to 1 percent of the using amount of the cementing material, and the water accounts for 30 to 50 percent of the using amount of the cementing material.
The pre-water-absorption super absorbent resin particles are particles with the particle size of 5-30mm formed after the super absorbent resin particles are soaked in water to absorb more than 20 times of the self weight of the particles; the super absorbent resin particles are particles with the particle size of 1 to 5mm before pre-absorbing water, and the distilled water absorption multiple of the super absorbent resin particles is more than 100 times.
The cementing material comprises cement and an auxiliary cementing material; the auxiliary cementing material is one or a mixture of more than two of fly ash, silica fume and mineral powder in any proportion, and the dosage of the auxiliary cementing material is 0-40% of that of cement.
The heat-conducting medium comprises one or a mixture of more of carbon fiber, carbon nano tube, graphite powder and carbon black powder according to any proportion, wherein the length of the carbon fiber is 2-10mm.
The fiber is any one or more of polypropylene fiber, aramid fiber, polyacrylonitrile fiber, polyvinyl alcohol fiber and cellulose fiber which are mixed according to any proportion, the diameter of the fiber is 10 to 50 micrometers, and the length of the fiber is 2 to 25mm.
The fine aggregate is river sand or machine-made sand, and the particle size is not more than 4.5mm.
The preparation method of the heat storage concrete based on the super absorbent resin is characterized by comprising the following steps:
1) Pre-absorbing water by the super absorbent resin particles: placing the super absorbent resin particles in water for soaking and absorbing water, obtaining pre-absorbent polymer resin particles with a required particle size range by controlling water absorption time or water absorption rate, and draining excessive water;
2) Taking materials: selecting raw materials according to the following proportion, wherein the super absorbent resin particles with water absorption in advance account for 50-200% of the using amount of the cementing material, the fine aggregate accounts for 0-150% of the using amount of the cementing material, the heat conducting medium accounts for 0.01-2% of the using amount of the cementing material, the fiber accounts for 0.1-1% of the using amount of the cementing material, and the water accounts for 30-50% of the using amount of the cementing material;
3) Stirring: putting the cementing material, the fine aggregate, the heat-conducting medium and the fiber into a stirrer and uniformly mixing the materials in a dry manner; then adding water and stirring uniformly; finally, adding the super absorbent resin particles which absorb water in advance, and stirring uniformly to obtain a mixture;
4) Molding: pouring the mixture into a mold (or indoor ground) with a preset heat-conducting pipe or a heating cable for molding, covering the molding surface with a plastic film, and demolding after the concrete is hardened;
5) And (3) maintenance: continuously placing the hardened concrete obtained in the step 4) in an environment with the humidity of more than or equal to 98% for curing, or soaking in water for curing, or carrying out surface wet coating/water spraying for curing until the specified age;
6) Surface sealing treatment: after the curing period is finished, when the surface of the hardened concrete is dry, spraying or brushing permeable waterproof emulsion or sealing waterproof paint on all the outer surfaces of the hardened concrete, and sealing to prevent the water in the heat storage concrete from losing.
The heat storage concrete based on the super absorbent resin is particularly suitable for a concrete backfill layer of an indoor floor heating system.
The principle of the invention is as follows: the invention utilizes the super-water-absorption and high-efficiency water-holding performance of the super-water-absorption resin to place the super-water-absorption resin particles in water for water absorption and expansion, thereby converting the conventional liquid water into quasi-solid state, introducing and storing the pre-water-absorption resin particles in the cement concrete matrix, taking the pre-water-absorption resin particles as a heat storage medium to realize the heat storage function of concrete and a building structure thereof, and simultaneously performing surface sealing treatment of the concrete to prevent the loss of internal water. When the heat storage material is used, the heat pipe or the heating cable is arranged in advance to heat the heat pipe or the heating cable, the heat is transferred to water held by the high water absorption resin through the concrete matrix, and the heat is stored by the temperature rise of the water, so that the functionality of the heat storage material is realized.
Compared with common concrete, the invention has the beneficial effects that:
firstly, the invention adopts the super absorbent resin to introduce a large amount of water into the concrete, prevents the internal water from losing through surface sealing treatment, and improves the water content in the concrete, thereby improving the specific heat capacity of the whole concrete.
Secondly, the heat-conducting medium with good heat-conducting property is doped in the heat-storage concrete prepared by the invention, so that the overall heat-conducting coefficient of the heat-storage concrete is greatly improved, external heat can be transferred to water in the super absorbent resin in the concrete, and the heat stored in the concrete can be transferred to the outside.
Thirdly, compared with other heat storage concrete, the invention has the advantages of low cost, simple operation, large specific heat capacity, high heat storage efficiency, safety, no pollution and the like.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
A heat storage concrete based on super absorbent resin comprises the following components in parts by weight: the P.O 42.5 Portland cement consists of pre-absorbed high water absorption resin particles accounting for 200% of the cement, fine aggregate accounting for 100% of the cement, heat conducting medium accounting for 0.01% of the cement, fiber accounting for 0.5% of the cement and water accounting for 30% of the cement. The super absorbent resin particles with pre-water absorption are particles with particle sizes of 5-10 mm formed by soaking super absorbent resin particles with particle sizes of 1-3 mm in water to enable the super absorbent resin particles to absorb more than 20 times of water of the super absorbent resin particles with self weight; the fine aggregate is river sand; the heat-conducting medium is carbon fiber, and the length of the heat-conducting medium is 5mm; the fiber is polypropylene fiber, the diameter of the fiber is 40 μm, and the length of the fiber is 20mm.
The preparation method of the heat storage coagulation based on the super absorbent resin comprises the following steps:
1) Preparing polymer hydrogel particles: soaking the super absorbent resin particles with the particle size of 1-2mm in water, absorbing water to reach the undetermined particle size (5-10mm), and draining off excessive water for later use;
2) Material taking: weighing the materials according to the proportion;
3) Stirring: putting cement, fine aggregate, heat-conducting medium and fiber into a stirrer and uniformly mixing; then adding water and stirring for 120 seconds; finally, adding the super absorbent resin particles with pre-absorbed water, and stirring for 60 seconds to obtain a mixture;
4) Molding: pouring the mixture into a mold with a preset heat conduction pipe for molding, covering the molding surface with a plastic film, and demolding after the concrete is hardened;
5) And (5) maintenance: curing the concrete obtained in the step 4) in water for 7 days;
6) Surface sealing treatment: and after the curing period is finished, immediately spraying permeable waterproof emulsion on the outer surface of the concrete when the surface of the concrete is dry, and sealing the surface of the concrete.
The main properties of the heat storage concrete based on the super absorbent resin are shown in table 1.
Example 2
A heat storage concrete based on super absorbent resin comprises the following components in parts by weight: the cementing material consists of 60% of P.O 42.5 ordinary portland cement, 20% of fly ash, 10% of mineral powder and 10% of silica fume, the pre-water-absorbing super absorbent resin particles account for 50% of the dosage of the cementing material, the fine aggregate accounts for 150% of the dosage of the cementing material, the heat-conducting medium accounts for 2% of the dosage of the cementing material, the fibers account for 0.1% of the dosage of the cementing material, and the water accounts for 50% of the dosage of the cement. The super absorbent resin particles with pre-water absorption are particles with particle sizes of 10-20 mm formed by soaking super absorbent resin particles with particle sizes of 3-5 mm in water to enable the particles to absorb more than 20 times of water of the particles; the fine aggregate is machine-made sand; the heat-conducting medium is graphite powder; the fiber is polyvinyl alcohol fiber, the diameter of the fiber is 50 μm, and the length of the fiber is 25mm.
The preparation method of the heat storage coagulation based on the super absorbent resin comprises the following steps:
1) Preparing polymer hydrogel particles: soaking super absorbent resin particles with the particle size of 4-5 mm in water, absorbing water to reach the undetermined particle size (5-20mm), and draining off excessive water for later use;
2) Material taking: weighing the materials according to the proportion;
3) Stirring: putting the cementing material, the fine aggregate, the heat-conducting medium and the fiber into a stirrer and uniformly mixing the materials in a dry manner; then adding water and stirring for 120 seconds; finally, adding the super absorbent resin particles with pre-absorbed water, and stirring for 60 seconds to obtain a mixture;
4) Molding: pouring the mixture into a mold for molding a preset heating cable, covering the molding surface with a plastic film, and demolding after the concrete is hardened;
5) And (3) maintenance: placing the concrete obtained in the step 4) in a standard curing environment for curing for 1 day;
6) Surface sealing treatment: and after the curing period is finished, immediately spraying permeable waterproof emulsion on the outer surface of the concrete when the surface of the concrete is dry, and sealing the surface of the concrete.
The main properties of the heat storage concrete based on the super absorbent resin are shown in table 1.
Example 3
A heat storage concrete based on super absorbent resin comprises the following components in parts by weight: the cementing material consists of 70 percent of P.O 32.5 ordinary portland cement and 30 percent of fly ash, the pre-water-absorbing super absorbent resin particles account for 150 percent of the dosage of the cementing material, the fine aggregate accounts for 120 percent of the dosage of the cementing material, the heat-conducting medium accounts for 1 percent of the dosage of the cementing material, the fiber accounts for 0.1 percent of the dosage of the cementing material, and the water accounts for 50 percent of the dosage of the cement. The super absorbent resin particles with pre-water absorption are particles with particle sizes of 20 to 30mm formed by soaking super absorbent resin particles with particle sizes of 4 to 5mm in water and enabling the particles to absorb water with more than 20 times of the self weight; the fine aggregate is river sand; the heat-conducting medium is carbon black powder; the fiber is cellulose fiber, the diameter of the fiber is 10 μm, and the length of the fiber is 10mm.
The preparation method of the heat storage coagulation based on the super absorbent resin comprises the following steps:
1) Preparing polymer hydrogel particles: soaking super absorbent resin particles with the particle size of 4-5 mm in water, sucking water to reach the undetermined particle size (15-30mm), and draining off excessive water for later use;
2) Material taking: weighing the materials according to the proportion;
3) Stirring: putting the cementing material, the fine aggregate, the heat-conducting medium and the fiber into a stirrer and uniformly mixing the materials in a dry manner; then adding water and stirring for 120 seconds; finally, adding the super absorbent resin particles with pre-absorbed water, and stirring for 60 seconds to obtain a mixture;
4) Molding: pouring the mixture into a mold for molding a preset heating cable, covering the molding surface with a plastic film, and demolding after the concrete is hardened;
5) And (5) maintenance: placing the concrete obtained in the step 4) in a standard curing environment for curing for 3 days;
6) Surface sealing treatment: and after the curing period is finished, immediately spraying permeable waterproof emulsion on the outer surface of the concrete when the surface of the concrete is dry, and sealing the surface of the concrete.
The main properties of the heat storage concrete based on the super absorbent resin are shown in table 1.
Example 4
A heat storage concrete based on super absorbent resin comprises the following components in parts by weight: the cementing material consists of 70 percent of P.O 42.5 ordinary Portland cement and 30 percent of sulphoaluminate cement, the pre-absorbed super absorbent resin particles account for 120 percent of the using amount of the cementing material, the fine aggregate accounts for 100 percent of the using amount of the cementing material, the heat conducting medium accounts for 0.05 percent of the using amount of the cementing material, the fiber accounts for 0.6 percent of the using amount of the cementing material, and the water accounts for 45 percent of the using amount of the cement. The super absorbent resin particles with pre-water absorption are particles with particle sizes of 15 to 25mm formed by soaking super absorbent resin particles with particle sizes of 3 to 5mm in water and enabling the super absorbent resin particles to absorb water with the weight more than 20 times of the self weight; the fine aggregate is machine-made sand; the heat-conducting medium is a carbon nano tube; the fiber is aramid fiber, the diameter of the fiber is 20 mu m, and the length of the fiber is 12mm.
The preparation method of the heat storage coagulation based on the super absorbent resin comprises the following steps:
1) Preparing polymer hydrogel particles: soaking super absorbent resin particles with the particle size of 3-5 mm in water, sucking water to reach the undetermined particle size (20-30mm), and draining off excessive water for later use;
2) Material taking: weighing the materials according to the proportion;
3) Stirring: putting the cementing material, the fine aggregate, the heat-conducting medium and the fiber into a stirrer for dry mixing uniformly; then adding water and stirring for 120 seconds; finally, adding the super absorbent resin particles with pre-absorbed water, and stirring for 120 seconds to obtain a mixture;
4) Molding: pouring the mixture into a mold for molding a preset heating cable, covering the molding surface with a plastic film, and demolding after the concrete is hardened;
5) And (5) maintenance: wet-laying and curing the surface of the concrete obtained in the step 4) for 10 days;
6) Surface sealing treatment: and after the curing period is finished and the surface of the concrete is dry, immediately spraying permeable waterproof emulsion on the outer surface of the concrete, and sealing the surface of the concrete.
The main properties of the heat storage concrete based on the super absorbent resin are shown in table 1.
Example 5
A heat storage concrete based on super absorbent resin comprises the following components in parts by weight: the cementing material consists of 70% of P.O 42.5 ordinary portland cement, 20% of fly ash, 5% of mineral powder and 5% of silica fume, the pre-water-absorbing super absorbent resin particles account for 45% of the using amount of the cementing material, the fine aggregate accounts for 90% of the using amount of the cementing material, the heat-conducting medium accounts for 1.6% of the using amount of the cementing material, the fibers account for 0.5% of the using amount of the cementing material, and the water accounts for 40% of the using amount of the cement. The super absorbent resin particles with pre-water absorption are particles with particle sizes of 5-25mm formed by soaking super absorbent resin particles with particle sizes of 1-5 mm in water to enable the particles to absorb more than 20 times of water by weight; the fine aggregate is machine-made sand; the heat-conducting medium is carbon fiber with the length of 2mm; the fiber is polypropylene fiber, the diameter of the fiber is 40 μm, and the length of the fiber is 20mm.
The preparation method of the heat storage coagulation based on the super absorbent resin comprises the following steps:
1) Preparation of polymer hydrogel particles: soaking super absorbent resin particles with the particle size of 4-5 mm in water, absorbing water to reach the undetermined particle size (5-20mm), and draining off excessive water for later use;
2) Material taking: weighing the materials according to the proportion;
3) Stirring: putting the cementing material, the fine aggregate, the heat-conducting medium and the fiber into a stirrer for dry mixing uniformly; then adding water, and stirring for 120 seconds; finally, adding the super absorbent resin particles with pre-absorbed water, and stirring for 60 seconds to obtain a mixture;
4) Molding: pouring the mixture into an indoor floor heating system with a preset heating cable for molding, then covering a plastic film on the leveled concrete floor, and removing the plastic film after the concrete is hardened;
5) And (5) maintenance: continuously spraying water on the ground molded in the step 4) for maintenance for 1 day;
6) Surface sealing treatment: and after the curing period is finished and the concrete ground surface is dry, immediately spraying permeable waterproof emulsion on the concrete ground surface, and sealing.
The main properties of the heat storage concrete based on the super absorbent resin are shown in table 1.
Comparative example 1
This example is substantially the same as example 1 except that the curing period was terminated and the concrete was dried and cured outdoors, and the surface of the demolded concrete was not subjected to any sealing treatment. The main properties are shown in Table 1.
Comparative example 2
This example is substantially the same as example 2, except that no heat transfer medium is included. The main properties are shown in Table 1.
TABLE 1
Claims (6)
1. The heat storage concrete based on the super absorbent resin is characterized by being prepared from a cementing material, super absorbent resin particles which absorb water in advance, fine aggregates, a heat conducting medium, fibers and water, wherein the dosage of each raw material is as follows: the pre-water-absorbing super-absorbent resin particles account for 50-200% of the using amount of the cementing material, the fine aggregate accounts for 0-150% of the using amount of the cementing material, the heat-conducting medium accounts for 0.01-2% of the using amount of the cementing material, the fiber accounts for 0.1-1% of the using amount of the cementing material, and the water accounts for 30-50% of the using amount of the cementing material, the outer surface of the concrete is sprayed or brushed with a permeable waterproof emulsion or a sealing waterproof coating, and the pre-water-absorbing super-absorbent resin particles are particles with the particle size of 5-30 mm formed after the super-absorbent resin particles are soaked in water to absorb more than 20 times of the self weight of the super-absorbent resin particles; the super absorbent resin particles are particles with the particle size of 1-5 mm before pre-absorbing water, and the distilled water absorption multiple of the super absorbent resin particles is more than 100 times.
2. The super absorbent resin based heat storage concrete according to claim 1, wherein: the cementing material comprises cement and an auxiliary cementing material; the auxiliary cementing material is one or a mixture of more than two of fly ash, silica fume and mineral powder according to any proportion, and the dosage of the auxiliary cementing material is 0-40% of the dosage of cement.
3. The super absorbent resin based heat storage concrete according to claim 1, wherein: the heat-conducting medium comprises one or a mixture of several of carbon fiber, carbon nano tube, graphite powder and carbon black powder according to any proportion, wherein the length of the carbon fiber is 2-10 mm.
4. The super absorbent resin based heat storage concrete according to claim 1, wherein: the fiber is one or more than two of polypropylene fiber, aramid fiber, polyacrylonitrile fiber, polyvinyl alcohol fiber and cellulose fiber mixed according to any proportion, the diameter of the fiber is 10-50 mu m, and the length of the fiber is 2-25 mm.
5. The super absorbent resin based heat storage concrete according to claim 1, wherein: the fine aggregate is river sand or machine-made sand, and the particle size is not more than 4.5mm.
6. The preparation method of the super absorbent resin-based heat storage concrete as claimed in claim 1, which comprises the following steps:
1) Pre-absorbing water by the super absorbent resin particles: placing the super absorbent resin particles in water for soaking and absorbing water, obtaining pre-absorbent polymer resin particles with a required particle size range by controlling water absorption time or water absorption rate, and draining excessive water;
2) Taking materials: selecting the raw materials according to the following proportion, wherein the superabsorbent resin particles account for 50-200% of the amount of the cementing material, the fine aggregate accounts for 0-150% of the amount of the cementing material, the heat-conducting medium accounts for 0.05-2% of the amount of the cementing material, the fiber accounts for 0.1-1% of the amount of the cementing material, and the water accounts for 30-50% of the amount of the cementing material;
3) Stirring: putting the cementing material, the fine aggregate, the heat-conducting medium and the fiber into a stirrer for dry mixing uniformly; then adding water and stirring uniformly; finally, adding the super absorbent resin particles with pre-absorbed water, and uniformly stirring to obtain a mixture;
4) Molding: pouring the mixture into a mold with a preset heat conduction pipe or a heating cable for molding, covering the molding surface with a plastic film, and demolding after the concrete is hardened;
5) And (5) maintenance: continuously placing the hardened concrete obtained in the step 4) in an environment with the humidity of more than or equal to 98% for curing, or soaking in water for curing, or carrying out surface wet-coating/water-spraying curing until the specified age;
6) Surface sealing treatment: and after the curing period is finished and the surface of the hardened concrete is dry, spraying or brushing penetration type waterproof emulsion or sealing waterproof paint on all the outer surfaces of the hardened concrete, and sealing.
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| CN108238752B true CN108238752B (en) | 2022-12-13 |
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| CN111606648B (en) * | 2019-04-29 | 2021-07-30 | 中建材创新科技研究院有限公司 | Gypsum-based heat-conducting self-leveling mortar and preparation method and application thereof |
| CN111606650B (en) * | 2019-04-29 | 2021-12-17 | 中建材创新科技研究院有限公司 | Heat-conducting paper-surface gypsum board and preparation method thereof |
| CN111606651A (en) * | 2019-04-29 | 2020-09-01 | 中建材创新科技研究院有限公司 | Heat-conducting gypsum self-leveling mortar and preparation method and application thereof |
| CN111606653B (en) * | 2019-04-29 | 2021-12-17 | 中建材创新科技研究院有限公司 | Phase-change heat-storage gypsum plaster board and preparation method thereof |
| CN111606649A (en) * | 2019-04-29 | 2020-09-01 | 中建材创新科技研究院有限公司 | Solid waste heat conduction self-leveling mortar and preparation method and application thereof |
| CN111998626B (en) * | 2020-09-10 | 2022-02-01 | 安徽马钢张庄矿业有限责任公司 | Low-concentration fine-grain tailing dehydration treatment device and method |
| CN112456893A (en) * | 2020-12-17 | 2021-03-09 | 金胜海 | Energy storage brick for heating and manufacturing method thereof |
| CN114380560B (en) * | 2022-02-08 | 2022-12-30 | 华创建筑设计有限公司 | C50 high-strength resin concrete and preparation process thereof |
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| JP5962514B2 (en) * | 2011-01-19 | 2016-08-03 | 日立化成株式会社 | Liquid crystalline resin composition, heat radiation material precursor, B stage sheet, prepreg, heat radiation material, laminated board, metal substrate, printed wiring board, liquid crystal resin composition production method, heat radiation material precursor production method, and heat radiation material Production method |
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