CN116903321A - Lightweight concrete phase-change energy-storage heat-preservation building block and preparation method thereof - Google Patents
Lightweight concrete phase-change energy-storage heat-preservation building block and preparation method thereof Download PDFInfo
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- CN116903321A CN116903321A CN202310591165.XA CN202310591165A CN116903321A CN 116903321 A CN116903321 A CN 116903321A CN 202310591165 A CN202310591165 A CN 202310591165A CN 116903321 A CN116903321 A CN 116903321A
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- 239000004567 concrete Substances 0.000 title claims abstract description 52
- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 238000004321 preservation Methods 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000012782 phase change material Substances 0.000 claims abstract description 19
- 239000004568 cement Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000004576 sand Substances 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000010881 fly ash Substances 0.000 claims abstract description 7
- 238000010521 absorption reaction Methods 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims description 11
- 239000012188 paraffin wax Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 8
- 239000004570 mortar (masonry) Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims 1
- 239000004566 building material Substances 0.000 abstract description 7
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005338 heat storage Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000012774 insulation material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 24
- 238000007906 compression Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/78—Heat insulating elements
-
- 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
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a lightweight concrete phase-change energy-storage heat-insulation block and a preparation method thereof, belongs to the technical field of building materials, and relates to a phase-change energy-storage heat-insulation material. The lightweight concrete phase-change energy storage heat preservation building block comprises the following components in parts by weight: 30 parts of cement, 10 parts of fly ash, 16-19 parts of water, 51-60 parts of ceramsite, 56-75 parts of sand and 10-50 parts of phase change material. The shale ceramisite is combined with the phase-change material to form the novel building material with heat storage and temperature regulation functions, has the advantages of high energy storage density, heat absorption and release under approximate constant temperature and the like, can effectively maintain the comfort level of the environment, and reduces the energy consumption and the cost required by heating and refrigerating of the building.
Description
Technical Field
The invention belongs to the technical field of building materials, relates to a phase-change energy-storage heat-insulation material, and in particular relates to a lightweight concrete phase-change energy-storage heat-insulation block and a preparation method thereof.
Background
Phase change materials refer to substances that change physical properties with temperature changes and can provide latent heat. The process in which the physical properties are transformed is called a phase change process, where the phase change material will absorb or release a large amount of latent heat. The phase change material is widely applied in human life and becomes an energy-saving and environment-friendly carrier.
Currently, phase change materials have been applied as building materials in the building field, wherein their application in building enclosures has great potential for building energy conservation. The building material is taken as the foundation of the whole building, innovation and development of the building are also closely related, in order to meet new development requirements, the energy conservation, environmental protection and other characteristics of the building are required to be improved, the aesthetic appearance of the building is also required to be ensured by future building materials, and the modernization characteristics are also required to be remarkable, so that the requirements and aesthetic pursuits of people on high-quality life are met.
In the research of integrating the phase change material with the building enclosure, many scholars have conducted many studies on the integration form and the integration effect of the phase change material and have also obtained many advantageous conclusions, but there still exist some problems including how to balance the relationship between the heat conduction performance of the enclosure and the heat conductivity and the phase change capability of the phase change material, and how to balance the feasibility, the diversity and the economy of using the phase change material in building engineering in different climate areas.
Therefore, research and development of a phase change material with good heat preservation and insulation and heat accumulation and release effects and mechanical properties meeting structural design requirements becomes one of the hot spots of current research.
Disclosure of Invention
The invention aims to provide a lightweight concrete phase-change energy-storage heat-insulation block.
The invention further aims at providing a preparation method of the lightweight concrete phase-change energy storage heat preservation building block.
The invention is realized by the following technical scheme:
the lightweight concrete phase-change energy storage heat preservation building block comprises the following components in parts by weight:
cement 30 fly ash 10 water 16-19
51-60 parts of ceramsite, 56-75 parts of sand and 10-50 parts of phase change material.
Further, the heat-insulating building block preferably comprises the following components in parts by weight:
cement 30 fly ash 10 water 19
Ceramsite 60 sand 56 phase-change paraffin 30.
The ceramsite is shale ceramsite with the particle size of 5-10 mm and the bulk density of 600-700kg/m 3 Apparent density of 1000-1100 kg/m 3 The water absorption rate is 5-7% in 1h, and the cylinder pressure is 3.0-3.5MPa;
the cement is P.C and 42.5 composite silicate cement.
The phase-change material is phase-change paraffin with a phase-change temperature of 23.3 ℃ and a phase-change enthalpy of 203.3 kJ/kg, and other organic or inorganic phase-change materials can be used at other phase-change temperatures.
The lightweight concrete phase-change energy storage and heat preservation building block is 390 mm multiplied by 190 multiplied by mm multiplied by 190 mm.
Furthermore, the invention also provides a preparation method of the lightweight concrete phase-change energy storage heat preservation building block, which comprises the following steps:
mixing cement, fly ash and ceramsite to obtain the ceramsite concrete hollow block, wherein the ceramsite concrete hollow block is provided with a casting groove, coating waterproof paint in the casting groove, sealing the bottom by using mortar, pouring the melted phase-change paraffin into the casting groove, and sealing the bottom to obtain the lightweight concrete phase-change energy storage heat preservation block.
Two casting grooves are formed in one side of the ceramsite concrete hollow block, and phase-change paraffin is respectively cast.
The invention uses shale ceramsite as a main material, and prepares a concrete block according to a traditional method, wherein a casting groove for casting phase-change materials is reserved on the concrete block, waterproof paint is smeared in the casting groove, mortar is used for sealing the bottom, phase-change paraffin is melted, and then the casting groove is poured, and then the bottom is sealed. In order to verify the compression resistance and the heat conduction performance of the lightweight concrete phase-change energy storage heat preservation building block, the dry density, the compression strength and the heat conduction performance are respectively tested, wherein the average dry apparent density is 1156.2kg/m 3 ≤1200kg/m 3 The average compressive strength is 7.59 MPa to more than 7.5 MPa, and the minimum compressive strength is 7.23 MPa to more than 6.0 MPa. The result shows that the material has good density grade and compressive strength, is a material integrating bearing, heat preservation and light weight, is used for masonry wall, and can obtain good heat preservation, heat insulation and temperature regulation effects.
Compared with the prior art, the invention has the following advantages:
the shale ceramisite is combined with the phase-change material to form the novel building material with heat storage and temperature regulation functions, has the advantages of high energy storage density, heat absorption and release under approximate constant temperature and the like, can effectively maintain the comfort level of the environment, and reduces the energy consumption and the cost required by heating and refrigerating of the building.
Drawings
Fig. 1 is a schematic structural view of the ceramsite concrete hollow block of the present invention.
Description of the embodiments
The process of the present invention is further illustrated by the following examples, which are not intended to limit the invention thereto.
Examples
Ceramsite concrete was prepared according to the formulation of table 1 using a conventional method.
TABLE 1
Ceramsite concrete was prepared according to the raw materials with different proportions listed in table 1, and was respectively put into test molds of 150 mm ×150× 150 mm ×150× 150 mm for compressive strength and 300 mm ×300× 300 mm ×30× 30 mm for thermal conductivity; c3 is put into a test mould of 390 mm multiplied by 190 multiplied by mm multiplied by 190 mm to manufacture a ceramsite concrete hollow block, the structure is shown in figure 1, wherein the test mould is provided with a lug for forming a casting groove, phase-change paraffin (other organic or inorganic composite phase-change materials can be used) is poured into the casting groove, and the phase-change energy-storage heat-insulation block of light concrete is manufactured by sealing the bottom with mortar. And (3) placing the finished product into a curing box, and curing for 28 days under standard conditions (the temperature is 20+/-2 ℃ and the humidity is 90+/-5%).
Examples
(1) And (3) testing the compressive strength of shale ceramsite concrete: placing the shale ceramsite concrete test block on a lower pressing plate of a testing machine, enabling a pressure bearing surface of a test piece to be perpendicular to a molding surface, starting a pressure testing machine, stopping adjusting a throttle of the testing machine when the test piece is close to damage and starts to deform rapidly until the test piece is damaged, recording a damage load P (N), and calculating the compression strength of the shale ceramsite concrete cube according to the following formula:
(1)
In the formula (1)f cu -shale ceramsite concrete cube compressive strength, MPa;
p-destructive load, N;
a-area of test piece under pressure, mm 2 。
(2) Compression strength test of shale ceramsite concrete small hollow block: firstly, treating a slurry-setting surface and a slurry-laying surface of a light concrete small hollow block test piece to form mutually parallel surfaces, placing a steel plate on a stable base, leveling the surface upwards, leveling the steel plate to be horizontal by a leveling ruler, firstly thinly coating an engine oil layer or paving a piece of wet paper layer on the steel plate, then paving a layer of cement with the weight of more than No. 325 of 1 part and 2 parts of fine sand, adding a proper amount of water to prepare a mortar, stably pressing the slurry-setting surface or the slurry-laying surface of the test piece on the mortar-setting surface to ensure that the mortar layer is as uniform as possible, scraping off redundant sand and standing for 24 to h, and then treating the other surface of the test piece according to the method. In order to make the upper and lower surfaces parallel to each other, the level bar should be placed on the first surface which is now upward to be level when the second surface is treated, and the compressive strength test should be performed after standing at 10 ℃ or above for 3 d. During testing, the test piece is placed in the testing machine, so that the pressure centers of the pressing plates of the axis testing machine of the test piece are overlapped, the test piece is loaded to be damaged, the damage load P (N) is recorded, and the compressive strength of the shale ceramsite concrete small-sized hollow block is calculated according to the formula.
The cube compressive strength of the finished product at different compounding ratios is shown in table 2 below,
TABLE 2
As can be seen from table 2, under the condition that the water-cement ratio is unchanged, the compressive strength gradually decreases with the increase of the ceramsite content and the decrease of the sand ratio; under the condition of the same sand ratio, the smaller the water-cement ratio is, the larger the compressive strength is; under the three combination ratios, the compression strength and the speed value of each group are larger than 15 MPa, and the concrete has larger compression strength, wherein the compression strength of the shale ceramisite concrete of group C has smaller change, and the compression resistance is the best and the most stable.
5 shale ceramsite concrete small hollow blocks are prepared according to the mixing proportion design of C3, the dry density and the compressive strength of the small hollow blocks are shown in table 3,
TABLE 3 Table 3
As can be seen from Table 3, the average dry apparent density was 1156.2kg/m 3 ≤1200 kg/m 3 The average compressive strength is 7.59 MPa & gt7.5 MPa, the minimum compressive strength is 7.23 MPa & gt6.0 MPa, the density grade and the compressive strength meet the requirements of MU7.5 in GBT15229-2011 lightweight aggregate concrete small hollow block, and the prepared shale ceramsite concrete hollow block is a load-bearing and heat-insulating lightweight aggregate concrete small hollow block, and the lightweight concrete phase-change energy-storage heat-insulating block produced by the shale ceramsite concrete hollow block is used for building walls and has good heat-insulating and temperature-regulating effects.
Examples
And (3) heat conduction coefficient test: the thermal conductivity is tested by adopting a protection hot plate method in a steady state method, the principle of the steady state method is simple, the calculation is convenient, the detection precision is high, and the digital display of the thermal conductivity can be realized.
The thermal conductivity of the finished product at different compounding ratios is shown in table 4,
TABLE 4 Table 4
The table shows that under the condition of the same sand ratio, the larger the water-cement ratio is, the smaller the heat conductivity coefficient of the shale ceramsite concrete is; under the condition of the same water cement ratio, the higher the ceramsite content is, the smaller the heat conductivity coefficient of the shale ceramsite concrete is; when the sand ratio was 30% and the water-cement ratio was 0.48, the thermal conductivity of C3 was 0.032. 0.032W/(mK), indicating that the heat-insulating effect was best.
It will be appreciated by persons skilled in the art that the foregoing description is a preferred embodiment of the invention, and is not intended to limit the invention, but rather to limit the invention to the specific embodiments described, and that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for elements thereof, for the purposes of those skilled in the art. Modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (8)
1. The lightweight concrete phase-change energy storage heat preservation building block is characterized by comprising the following components in parts by weight:
cement 30 fly ash 10 water 16-19
51-60 parts of ceramsite, 56-75 parts of sand and 10-50 parts of phase change material.
2. The lightweight concrete phase change energy storage insulation block according to claim 1, wherein the insulation block preferably comprises the following components in parts by weight:
cement 30 fly ash 10 water 19
Ceramsite 60 sand 56 phase-change paraffin 30.
3. The lightweight concrete phase-change energy-storage heat-insulation block according to claim 1, wherein the ceramsite is shale ceramsite with a grain size of 5-10 mm and a bulk density of 600-700kg/m 3 Apparent density of 1000-1100 kg/m 3 The water absorption rate is 5-7% in 1h, and the cylinder pressure is 3.0-3.5Mpa.
4. The lightweight concrete phase change energy storage and heat preservation block according to claim 1, wherein the cement is P.C 42.5.5 composite Portland cement.
5. The lightweight concrete phase-change energy-storage heat-insulation block according to claim 1, wherein the phase-change material is phase-change paraffin with a phase-change temperature of 23.3 ℃ and a phase-change enthalpy of 203.3 kJ/kg.
6. The lightweight concrete phase change energy storage and insulation block of claim 1, wherein the lightweight concrete phase change energy storage and insulation block is 390 mm x 190 x mm x 190 mm.
7. The method for preparing the lightweight concrete phase-change energy-storage heat-preservation building block is characterized by comprising the following steps:
mixing cement, fly ash and ceramsite to prepare a ceramsite concrete hollow block, wherein the ceramsite concrete hollow block is provided with a pouring groove, coating waterproof paint in the pouring groove, sealing the bottom by mortar, pouring the melted phase-change paraffin into the pouring groove, and sealing the bottom to obtain the lightweight concrete phase-change energy storage heat preservation block.
8. The preparation method of the lightweight concrete phase-change energy-storage heat-preservation building block is characterized in that two casting grooves are formed in one side of the ceramsite concrete hollow building block, and phase-change paraffin is respectively cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310591165.XA CN116903321A (en) | 2023-05-24 | 2023-05-24 | Lightweight concrete phase-change energy-storage heat-preservation building block and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310591165.XA CN116903321A (en) | 2023-05-24 | 2023-05-24 | Lightweight concrete phase-change energy-storage heat-preservation building block and preparation method thereof |
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| CN202310591165.XA Pending CN116903321A (en) | 2023-05-24 | 2023-05-24 | Lightweight concrete phase-change energy-storage heat-preservation building block and preparation method thereof |
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| CN (1) | CN116903321A (en) |
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- 2023-05-24 CN CN202310591165.XA patent/CN116903321A/en active Pending
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