CN115073208A - Heat storage type ground heating backfill cushion layer and preparation method and application thereof - Google Patents
Heat storage type ground heating backfill cushion layer and preparation method and application thereof Download PDFInfo
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- CN115073208A CN115073208A CN202210787659.0A CN202210787659A CN115073208A CN 115073208 A CN115073208 A CN 115073208A CN 202210787659 A CN202210787659 A CN 202210787659A CN 115073208 A CN115073208 A CN 115073208A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 71
- 238000005338 heat storage Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000004088 foaming agent Substances 0.000 claims abstract description 52
- 235000021120 animal protein Nutrition 0.000 claims abstract description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000010439 graphite Substances 0.000 claims abstract description 36
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 36
- 239000000654 additive Substances 0.000 claims abstract description 31
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- 150000001875 compounds Chemical class 0.000 claims abstract description 31
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 239000004567 concrete Substances 0.000 claims abstract description 26
- 239000004576 sand Substances 0.000 claims abstract description 25
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 12
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 12
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 12
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 12
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000006260 foam Substances 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 25
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 21
- 238000005187 foaming Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 14
- 239000012452 mother liquor Substances 0.000 claims description 14
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 10
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 8
- 108010010803 Gelatin Proteins 0.000 claims description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 7
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 7
- 241001122767 Theaceae Species 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 229920000159 gelatin Polymers 0.000 claims description 7
- 239000008273 gelatin Substances 0.000 claims description 7
- 235000019322 gelatine Nutrition 0.000 claims description 7
- 235000011852 gelatine desserts Nutrition 0.000 claims description 7
- 230000003301 hydrolyzing effect Effects 0.000 claims description 7
- 150000003904 phospholipids Chemical class 0.000 claims description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 7
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 7
- 239000001397 quillaja saponaria molina bark Substances 0.000 claims description 7
- 229930182490 saponin Natural products 0.000 claims description 7
- 150000007949 saponins Chemical class 0.000 claims description 7
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 7
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 7
- 235000011152 sodium sulphate Nutrition 0.000 claims description 7
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000005977 Ethylene Substances 0.000 claims description 2
- -1 acrylic ester Chemical class 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 229920001567 vinyl ester resin Polymers 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims 1
- 230000005484 gravity Effects 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 28
- 239000004575 stone Substances 0.000 description 6
- 235000018102 proteins Nutrition 0.000 description 5
- 108090000623 proteins and genes Proteins 0.000 description 5
- 102000004169 proteins and genes Human genes 0.000 description 5
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052612 amphibole Inorganic materials 0.000 description 1
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- 239000001913 cellulose Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
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- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical class [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
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- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring 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
-
- 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
-
- 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
Abstract
The invention relates to the technical field of ground heating backfill, in particular to a heat storage type ground heating backfill cushion layer and application thereof; the heat storage type ground heating backfill cushion comprises the following components in parts by weight: 30-60 parts of fine aggregate concrete, 30-60 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive; the expanding agent is an animal protein compound foaming agent, and the combined additive comprises redispersible rubber powder, polyvinyl alcohol and hydroxypropyl methyl cellulose in parts by weight; according to the invention, the solid waste graphite tailing sand in graphite development is added into the ground heating backfill cushion layer, so that the heat storage coefficient of the ground heating backfill cushion layer can be improved, and the characteristics of small specific gravity and high compressive strength of the ground heating backfill cushion layer can not be influenced; according to the invention, the floor heating backfill cushion layer has good fluidity and excellent mechanical property by selecting the expanding agent and the combined additive.
Description
Technical Field
The invention relates to the technical field of ground heating backfill, in particular to a heat storage type ground heating backfill cushion layer and a preparation method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The floor heating can be divided into a wet type and a dry type according to different paving structures, and the main difference between the wet type and the dry type lies in whether backfilling is needed. The wet floor heating needs to be backfilled, and the main functions of the backfill layer in the whole floor heating are heat storage, heat uniformity and floor heating pipe protection. The ground heating backfill layer is a backfill layer of the ground heating system and can also be called a heat storage layer. Ground heating backfill can protect ground heating pipes on one hand, and on the other hand, the heat storage effect is also achieved, so that the service efficiency of ground heating is higher. The floor heating backfill layer in the prior art is made of C20 pea stone concrete, but the heat storage effect is poor.
Graphite is an inorganic non-metallic material, has wide application in the fields of lubrication, wear resistance, corrosion, electric conduction, energy storage and the like, and is an indispensable key material in the industries of national defense, aerospace, machinery and the like. The production of each ton of graphite produces over 100 tons of waste water and tailings. A large amount of accumulated graphite tailings occupy farmland, reduce land utilization rate, and the particle size of the graphite tailings is small, so that sand raising is easily caused, and the ecological environment is seriously damaged. At present, the application range of graphite tailings is narrower, and most of graphite tailings are used for burying subgrade foundations. A large amount of graphite tailings also cause the problems of land occupation and safety, become a main factor for restricting the sustainable development of graphite enterprises, and are very important for resource utilization of the graphite tailings. But the research on how to apply the graphite tailings to the floor heating backfill layer is still less.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a heat storage type ground heating backfill cushion layer and a preparation method and application thereof.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
in a first aspect of the present invention, the present invention provides a heat storage type ground heating backfill cushion layer, which comprises the following components by weight: 30-60 parts of fine aggregate concrete, 30-60 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive;
in a second aspect of the present invention, the present invention provides a method for preparing the heat storage type ground heating backfill cushion layer in the first aspect, and the preparation method includes the following steps:
(1) mixing the expanding agent with water, and then foaming by using a high-speed foaming machine;
(2) adding water into the fine aggregate concrete and the graphite tailing sand, pre-stirring to prepare uniform slurry, then adding the combined additive and the expanding agent prepared in the step (1), uniformly stirring, and then casting and molding.
In a third aspect of the invention, the invention provides an application of the heat storage type ground heating backfill cushion layer in the first aspect in ground heating.
The specific embodiment of the invention has the following beneficial effects:
according to the invention, the solid waste graphite tailing sand in graphite development is added into the ground heating backfill cushion layer, so that the heat storage coefficient of the ground heating backfill cushion layer can be improved, and the characteristics of small specific gravity and high compressive strength of the ground heating backfill cushion layer can not be influenced;
according to the invention, the floor heating backfill cushion has good fluidity and excellent mechanical property by selecting the expanding agent and the combined additive.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As discussed in the background art, the ground heating backfill cushion layer in the prior art has the technical problems of low heat storage value and the like, and on the basis, the invention provides the heat storage type ground heating backfill cushion layer.
Floor heating known in the prior art has three layers: the bottom layer is made of microporous concrete and has the requirements on sound insulation and heat preservation; in addition, the compressive strength and the low water absorption and flowability should be met; the lightweight backfill mat should have the following characteristics: the first is fluidity, the second is heat storage capacity, and the third is small specific gravity; the surface layer should have the properties: the material has good fluidity, lightens as much as possible under the condition of meeting the strength, and has fine, smooth, wear-resistant and flat surface. The invention provides a light backfill cushion layer.
The invention provides a heat storage type ground heating backfill cushion layer, which comprises the following components in parts by weight: 30-60 parts of fine aggregate concrete, 30-60 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive;
in a specific embodiment, the heat storage type ground heating backfill cushion comprises the following components in parts by weight: 30-60 parts of fine stone concrete, 30-50 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive;
in a specific embodiment, the heat storage type ground heating backfill cushion comprises the following components in parts by weight: 30-60 parts of fine aggregate concrete, 40-60 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive;
the graphite tailings are in a micro-fine powder shape, are yellow brown and have a soil-like luster; the graphite tailings contain quartz, mica group minerals, potash feldspar, calcite, chlorite and amphibole, and the content of the fixed carbon is 20-30 percent; the graphite tailing particles are fine and easy to disperse.
The fine stone concrete is concrete with the maximum grain size of coarse aggregate not larger than 15 mm.
In a specific embodiment, the animal protein compound foaming agent is selected as the expanding agent; further, the preparation method of the animal protein compound foaming agent comprises the following steps:
(1) mixing pig trotter, sodium bisulfite, thiourea, urea and water, adjusting the pH value to 5.5, hydrolyzing at 70-80 ℃, quickly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain a filtrate, namely the animal protein foaming agent mother liquor;
(2) and adding fatty alcohol-polyoxyethylene ether sodium sulfate, sodium dodecyl benzene sulfonate, tea saponin, phospholipid and gelatin into the prepared animal protein foaming agent mother liquor, heating to 40-50 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
In the application, the animal protein composite foaming agent known in the prior art can also be selected from animal protein foaming agents with high foaming times and strong stability.
The animal protein type foaming agent has good foaming performance and stability, rich raw materials and environmental friendliness, and is a high-quality and high-grade foaming agent; the animal protein foaming agent mainly comprises three categories of hydrolyzed animal hoof and horn, hydrolyzed animal hair and hydrolyzed blood glue. The foaming principle of protein foaming agents is the degradation of proteins. The peptide bonds in the protein macromolecules are broken to generate easily-dissolved protein micromolecules, and the hydrophobic groups are gradually increased along with the increase of the protein micromolecules in the solution, so that the surface tension is reduced, and an interface is formed. In addition, because hydrogen bonds can be formed among special groups in molecules, strong hydrogen bond action can ensure that the solution forms a foam liquid film with higher strength, thereby leading the foaming agent to generate stable foam.
In a specific embodiment, the combined additive comprises redispersible rubber powder, polyvinyl alcohol and hydroxypropyl methylcellulose;
preferably, the weight ratio of the redispersible rubber powder, the polyvinyl alcohol and the hydroxypropyl methylcellulose is 8: 1-2: 1-2;
preferably, the redispersible rubber powder is selected from one or more of the following rubber powders: vinyl acetate and ethylene copolymerized rubber powder (Vac/E), vinyl acetate and higher fatty acid vinyl ester copolymerized rubber powder (Vac/VeoVa), acrylic ester and styrene copolymerized rubber powder (A/S), vinyl acetate homopolymerized rubber powder (PVac) and styrene and butadiene copolymerized rubber powder (SBR).
Hydroxypropyl methyl cellulose belongs to one of nonionic cellulose mixed ethers, is a semi-synthetic, inactive and viscoelastic polymer, and can be used as a water-retaining agent and a retarder of cement mortar in the construction industry to make the mortar have pumpability. The coating mortar, the gypsum material, the putty powder or other building materials are used as an adhesive to improve the coating property and prolong the operable time. The water-retaining property of the cement paste can ensure that the paste does not crack due to too fast drying after being coated and the strength after hardening is enhanced.
Polyvinyl alcohol is an important chemical raw material, and is used for manufacturing polyvinyl acetal, gasoline-resistant pipelines, vinylon, fabric treating agents, emulsifiers, paper coatings, adhesives, glue and the like.
According to the invention, the redispersible rubber powder is matched with the polyvinyl alcohol and the hydroxypropyl methyl cellulose, so that the ground heating backfill cushion layer has good fluidity and excellent mechanical properties.
In an embodiment of the invention, the invention provides a preparation method of the heat storage type ground heating backfill cushion layer, which comprises the following steps:
(1) mixing an expanding agent, namely an animal protein compound type foaming agent and water, and then foaming by using a high-speed foaming machine;
(2) adding water into the fine aggregate concrete and the graphite tailing sand, pre-stirring to prepare uniform slurry, then adding the combined additive and the expanding agent prepared in the step (1), uniformly stirring, and then casting and molding.
Preferably, the animal protein compound foaming agent and the water are mixed according to the weight ratio of 1: mixing at a ratio of 40-50;
preferably, the rotating speed of the stirring blade during bubble making is 700-800 rpm; the foam making time is 3-5 minutes until no large foam exists in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
In an embodiment of the invention, the invention provides an application of the heat storage type ground heating backfill cushion layer in ground heating.
The present invention will be further described with reference to specific examples.
Example 1
The heat storage type ground heating backfill cushion comprises the following components in parts by weight: fine aggregate concrete 40, graphite tailing sand 40, an expanding agent 4 and a combined additive 4;
the preparation method of the heat storage type ground heating backfill cushion comprises the following steps:
(1) firstly, preparing a compound animal protein foaming agent: mixing 8 parts of pig nail, 3 parts of sodium bisulfite, 2 parts of thiourea, 6 parts of urea and 120 parts of water, adjusting the pH value to 5.5, hydrolyzing at 75 ℃ for 6 hours, quickly transferring to a water bath after the reaction is finished, cooling to the normal temperature, centrifuging, filtering, and obtaining a filtrate which is the animal protein foaming agent mother liquor; and adding 3 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 3 parts of sodium dodecyl benzene sulfonate, 2 parts of tea saponin, 1.5 parts of phospholipid and 2 parts of gelatin into the prepared animal protein foaming agent mother liquor, heating to 45 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
(2) Mixing an animal protein compound type foaming agent and water according to the weight ratio of 1: 40, and then foaming by using a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
(3) Adding water into fine aggregate concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding a combined additive (the combined additive comprises 8 parts of redispersible rubber powder, 1 part of polyvinyl alcohol and 1 part of hydroxypropyl methyl cellulose) and the compound animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and molding.
Example 2
The heat storage type ground heating backfill cushion layer comprises the following components in parts by weight: 50 parts of fine aggregate concrete, 40 parts of graphite tailing sand, 5 parts of an expanding agent and 4 parts of a combined additive;
(1) firstly, preparing a compound animal protein foaming agent: mixing 8 parts of pig nail, 3 parts of sodium bisulfite, 2 parts of thiourea, 6 parts of urea and 120 parts of water, adjusting the pH value to 5.5, hydrolyzing at 75 ℃ for 6 hours, quickly transferring to a water bath after the reaction is finished, cooling to the normal temperature, centrifuging, filtering, and obtaining a filtrate which is the animal protein foaming agent mother liquor; and adding 3 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 3 parts of sodium dodecyl benzene sulfonate, 2 parts of tea saponin, 1.5 parts of phospholipid and 2 parts of gelatin into the prepared animal protein foaming agent mother liquor, heating to 40 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
(2) Mixing an animal protein compound type foaming agent and water according to the weight ratio of 1: 50, and then foaming by using a high-speed foaming machine, wherein the foaming time is 4 minutes until no large bubbles exist in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
(3) Adding water into fine aggregate concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding a combined additive (the combined additive comprises 8 parts of redispersible rubber powder, 2 parts of polyvinyl alcohol and 2 parts of hydroxypropyl methyl cellulose) and the compound animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and molding.
Example 3
The heat storage type ground heating backfill cushion comprises the following components in parts by weight: fine aggregate concrete 60, graphite tailing sand 40, an expanding agent 5 and a combined additive 5;
(1) preparing a compound animal protein foaming agent: mixing 8 parts of pig nail, 3 parts of sodium bisulfite, 2 parts of thiourea, 6 parts of urea and 120 parts of water, adjusting the pH value to 5.5, hydrolyzing at 75 ℃ for 6 hours, quickly transferring to a water bath after the reaction is finished, cooling to the normal temperature, centrifuging, filtering, and obtaining a filtrate which is the animal protein foaming agent mother liquor; and adding 3 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 3 parts of sodium dodecyl benzene sulfonate, 2 parts of tea saponin, 1.5 parts of phospholipid and 2 parts of gelatin into the prepared animal protein foaming agent mother liquor, heating to 50 ℃, stirring uniformly, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
(2) Mixing an animal protein compound type foaming agent and water according to the weight ratio of 1: 40, and then foaming by using a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
(3) Adding water into fine aggregate concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding a combined additive (the combined additive comprises 8 parts of redispersible rubber powder, 2 parts of polyvinyl alcohol and 1 part of hydroxypropyl methyl cellulose) and the compound animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and molding.
Example 1
The heat storage type ground heating backfill cushion layer comprises the following components in parts by weight: 50 parts of fine aggregate concrete, 50 parts of graphite tailing sand, 4 parts of an expanding agent and 4 parts of a combined additive;
the preparation method of the heat storage type ground heating backfill cushion comprises the following steps:
(1) firstly, preparing a compound animal protein foaming agent: mixing 8 parts of pig nail, 3 parts of sodium bisulfite, 2 parts of thiourea, 6 parts of urea and 120 parts of water, adjusting the pH value to 5.5, hydrolyzing at 75 ℃ for 6 hours, quickly transferring to a water bath after the reaction is finished, cooling to the normal temperature, centrifuging, filtering, and obtaining a filtrate which is the animal protein foaming agent mother liquor; and adding 3 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 3 parts of sodium dodecyl benzene sulfonate, 2 parts of tea saponin, 1.5 parts of phospholipid and 2 parts of gelatin into the prepared animal protein foaming agent mother liquor, heating to 45 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
(2) Mixing an animal protein compound type foaming agent and water according to the ratio of 1: 40, and then foaming by using a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
(3) Adding water into fine aggregate concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding a combined additive (the combined additive comprises 8 parts of redispersible rubber powder, 2 parts of polyvinyl alcohol and 2 parts of hydroxypropyl methyl cellulose) and the compound animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and molding.
Comparative example 1
The ground heating backfill cushion comprises the following components in parts by weight: fine aggregate concrete 80, an expanding agent 4 and a combined additive 4;
the preparation method of the ground heating backfill cushion layer comprises the following steps:
(1) firstly, preparing a compound animal protein foaming agent: mixing 8 parts of pig nail, 3 parts of sodium bisulfite, 2 parts of thiourea, 6 parts of urea and 120 parts of water, adjusting the pH value to 5.5, hydrolyzing at 75 ℃ for 6 hours, quickly transferring to a water bath after the reaction is finished, cooling to the normal temperature, centrifuging, filtering, and obtaining a filtrate which is the animal protein foaming agent mother liquor; and adding 3 parts of fatty alcohol-polyoxyethylene ether sodium sulfate, 3 parts of sodium dodecyl benzene sulfonate, 2 parts of tea saponin, 1.5 parts of phospholipid and 2 parts of gelatin into the prepared animal protein foaming agent mother liquor, heating to 45 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
(2) Mixing an animal protein compound type foaming agent and water according to the weight ratio of 1: 40, and then foaming by using a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
(3) Adding water into fine stone concrete, pre-stirring to prepare uniform slurry, adding a combined additive (the combined additive comprises 8 parts of redispersible rubber powder, 1 part of polyvinyl alcohol and 1 part of hydroxypropyl methyl cellulose) and the compound animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and molding.
Comparative example 2
The ground heating backfill cushion layer adopts C20 pea stone concrete: the cement is ordinary portland cement with the grade not lower than 32.5, the sand is medium sand or coarse sand, the mud content is not more than 5%, and the particle size of the pea stone is 5-15 mm.
The density, compressive strength and heat storage value of the ground heating backfill cushions of the examples 1-4 and the comparative examples 1-2 are summarized as follows:
as can be seen from the above table, the compressive strength of the heat storage type ground heating backfill cushion prepared by the method is not reduced compared with the backfill cushions in the comparison documents 1 and 2 under the condition of reduced density, but the heat storage value is greatly improved, and the heat storage type ground heating backfill cushion prepared by the method has good heat storage effect and mechanical property.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a backfill bed course warms up heat storage type which characterized in that, backfill bed course warms up heat storage type includes according to parts by weight: 30-60 parts of fine aggregate concrete, 30-60 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive.
2. The heat storage type ground heating backfill cushion according to claim 1, wherein the heat storage type ground heating backfill cushion comprises the following components in parts by weight: 30-60 parts of fine aggregate concrete, 30-50 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive.
3. The heat storage type ground heating backfill cushion layer according to claim 1, wherein the heat storage type ground heating backfill cushion layer comprises the following components in parts by weight: 30-60 parts of fine aggregate concrete, 40-60 parts of graphite tailing sand, 2-6 parts of an expanding agent and 2-6 parts of a combined additive.
4. The heat storage type ground heating backfill cushion according to claim 1, wherein the expanding agent is an animal protein compound type foaming agent.
5. The heat storage type ground heating backfill cushion according to claim 4, wherein the preparation method of the animal protein compound type foaming agent comprises the following steps:
(1) mixing pig trotter, sodium bisulfite, thiourea, urea and water, adjusting the pH value to 5.5, hydrolyzing at 70-80 ℃, quickly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain a filtrate, namely the animal protein foaming agent mother liquor;
(2) and adding fatty alcohol-polyoxyethylene ether sodium sulfate, sodium dodecyl benzene sulfonate, tea saponin, phospholipid and gelatin into the prepared animal protein foaming agent mother liquor, heating to 40-50 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the compound animal protein foaming agent.
6. The heat storage type floor heating backfill cushion according to claim 1, wherein the combined additive comprises redispersible rubber powder, polyvinyl alcohol and hydroxypropyl methyl cellulose;
preferably, the weight ratio of the redispersible rubber powder, the polyvinyl alcohol and the hydroxypropyl methyl cellulose is 8: 1-2: 1 to 2.
7. The heat storage type ground heating backfill cushion according to claim 6, wherein the redispersible rubber powder is selected from one or more of the following rubber powders: vinyl acetate and ethylene copolymerized rubber powder, vinyl acetate and higher fatty acid vinyl ester copolymerized rubber powder, acrylic ester and styrene copolymerized rubber powder, vinyl acetate homopolymerized rubber powder and styrene and butadiene copolymerized rubber powder.
8. A preparation method of the heat storage type ground heating backfill cushion layer according to any one of claims 1 to 7, characterized by comprising the following steps:
(1) mixing an expanding agent, namely an animal protein compound type foaming agent and water, and then foaming by using a high-speed foaming machine;
(2) adding water into the fine aggregate concrete and the graphite tailing sand, pre-stirring to prepare uniform slurry, then adding the combined additive and the expanding agent prepared in the step (1), uniformly stirring, and then casting and molding.
9. The method according to claim 8, wherein the ratio of the animal protein compound foaming agent to water is 1: mixing at a ratio of 40-50;
preferably, the rotating speed of the stirring blade during bubble making is 700-800 rpm; the foam making time is 3-5 minutes until no large foam exists in the foam, the foam particles are fine and uniform, and the foam volume is not increased any more.
10. The use of the regenerative floor heating backfill cushion according to any one of claims 1 to 7 in floor heating.
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