CN115073208B - Heat accumulating type floor heating backfill layer and preparation method and application thereof - Google Patents
Heat accumulating type floor heating backfill layer and preparation method and application thereof Download PDFInfo
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- CN115073208B CN115073208B CN202210787659.0A CN202210787659A CN115073208B CN 115073208 B CN115073208 B CN 115073208B CN 202210787659 A CN202210787659 A CN 202210787659A CN 115073208 B CN115073208 B CN 115073208B
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- floor heating
- heating backfill
- animal protein
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- 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
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- 238000003756 stirring Methods 0.000 claims description 21
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- 239000002245 particle Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
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- 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
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- 230000003301 hydrolyzing effect Effects 0.000 claims description 7
- 239000012452 mother liquor Substances 0.000 claims description 7
- 239000010413 mother solution Substances 0.000 claims description 7
- 150000003904 phospholipids Chemical class 0.000 claims description 7
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 7
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- 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
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 229920001038 ethylene copolymer Polymers 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
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- -1 sodium fatty alcohol Chemical class 0.000 claims description 2
- 239000004289 sodium hydrogen sulphite Substances 0.000 claims description 2
- 229920001567 vinyl ester resin Polymers 0.000 claims description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N vinyl-ethylene Natural products C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 2
- 241001122767 Theaceae Species 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 16
- 238000005338 heat storage Methods 0.000 abstract description 14
- 238000009825 accumulation Methods 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 44
- 244000269722 Thea sinensis Species 0.000 description 6
- 241000282898 Sus scrofa Species 0.000 description 5
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 5
- 150000002191 fatty alcohols Chemical class 0.000 description 5
- 235000018102 proteins Nutrition 0.000 description 5
- 108090000623 proteins and genes Proteins 0.000 description 5
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- 229910052938 sodium sulfate Inorganic materials 0.000 description 5
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- 229910021532 Calcite Inorganic materials 0.000 description 1
- 241000282894 Sus scrofa domesticus Species 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
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
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- 239000001913 cellulose Substances 0.000 description 1
- 239000004568 cement 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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- 230000007123 defense Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 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
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- 239000003292 glue Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
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- 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
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- 238000005461 lubrication Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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 floor heating backfill, in particular to a heat accumulating type floor heating backfill layer and application thereof; the heat accumulation type floor heating backfill cushion layer comprises the following components in parts by weight: 30-60 parts of fine stone concrete, 30-60 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive; the expanding agent is an animal protein composite foaming agent, and the combined additive comprises redispersible rubber powder, polyvinyl alcohol and hydroxypropyl methyl cellulose according to parts by weight; according to the invention, the solid waste graphite tailing sand in the graphite development is added into the floor heating backfill layer, so that the heat storage coefficient of the floor heating backfill layer can be improved, and meanwhile, the characteristics of small specific gravity and high compressive strength of the floor heating backfill layer are not influenced; according to the floor heating backfill cushion layer, the expansion agent and the combined additive are selected, so that the floor heating backfill cushion layer is good in fluidity and excellent in mechanical property.
Description
Technical Field
The invention relates to the technical field of floor heating backfill, in particular to a heat accumulating type floor heating backfill layer, and a preparation method and application thereof.
Background
The disclosure of this background section is only intended to increase the 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 already known to those of ordinary skill in the art.
Floor heating can be divided into wet type and dry type according to different paving structures, and the main difference between the two is whether backfilling is needed. The wet floor heating needs backfilling, and the backfilling layer has the main functions of heat accumulation, uniform heat and floor heating pipe protection in the whole floor heating. The floor heating backfill is a backfill layer of a floor heating system and can be also called a heat storage layer. On one hand, the floor heating backfill can protect floor heating pipes, and on the other hand, the floor heating backfill also plays a role in heat accumulation, so that the use efficiency of the floor heating is higher. In the prior art, the floor heating backfill layer is made of C20 bean concrete generally, but the heat storage effect is poor.
Graphite is an inorganic nonmetallic material, has very wide application in the fields of lubrication, wear resistance, corrosion, conduction, energy storage and the like, and is an essential key material in the industries of national defense, aerospace, machinery and the like. The production of waste water and tailing sand per ton of graphite exceeds 100 tons. The large amount of accumulation of the graphite tailings invades the farmland, the land utilization rate is reduced, the particle size of the graphite tailings is smaller, sand lifting is easy to occur, and the ecological environment is seriously damaged. The application surface of the graphite tailings is relatively narrow at present, and the graphite tailings are mostly used for landfill of roadbed foundations. The large amount of graphite tailings also causes land occupation and safety problems, becomes a main factor for restricting the sustainable development of graphite enterprises, and is very important for recycling the graphite tailings. However, how to apply graphite tailings to floor heating backfill layers is still less studied in the prior art.
Disclosure of Invention
According to the heat accumulating type floor heating backfill layer, graphite tailing sand is added into fine stone concrete, and the effect of simultaneously meeting the requirement of small specific gravity (density) and compressive strength of the backfill layer on the premise of improving the heat accumulating performance of the floor heating backfill layer is achieved by adding the expanding agent and the additive.
In order to achieve the above object, the technical scheme of the present invention is as follows:
in a first aspect of the present invention, the present invention provides a heat storage type floor heating backfill layer, which comprises the following components in parts by weight: 30-60 parts of fine stone concrete, 30-60 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive;
in a second aspect of the present invention, the present invention provides a method for preparing the heat accumulating type floor heating backfill layer according to the first aspect, the method comprising the following steps:
(1) Mixing an expanding agent and water, and then foaming by a high-speed foaming machine;
(2) Adding water into fine stone concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding the combined additive and the expanding agent prepared in the step (1), stirring uniformly, and casting and forming.
In a third aspect of the invention, the invention provides an application of the heat accumulating type floor heating backfill layer in floor heating.
The specific embodiment of the invention has the following beneficial effects:
according to the invention, the solid waste graphite tailing sand in the graphite development is added into the floor heating backfill layer, so that the heat storage coefficient of the floor heating backfill layer can be improved, and meanwhile, the characteristics of small specific gravity and high compressive strength of the floor heating backfill layer are not influenced;
according to the floor heating backfill cushion layer, the expansion agent and the combined additive are selected, so that the floor heating backfill cushion layer is good in fluidity and excellent in mechanical property.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. 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 present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As discussed in the background art, the floor heating backfill layer in the prior art has the technical problems of low heat storage value and the like, and based on the heat storage type floor heating backfill layer, the floor heating backfill layer with good heat storage effect and mechanical property is prepared through the cooperation of fine stone concrete, graphite tailing sand, an expanding agent and a combined additive.
Floor heating is known in the prior art to have three layers: the bottom layer is made of microporous concrete, and has the requirements of sound insulation and heat preservation; in addition, the compressive strength and lower water absorption and flowability should be satisfied; the light backfill layer should have the following characteristics: the fluidity is firstly, the heat storage capacity is secondly, and the specific gravity is small; the surface layer should have the properties: firstly, the fluidity is good, secondly, the weight is reduced as much as possible under the condition of meeting the strength, thirdly, the surface is fine, wear-resistant and flat. The invention provides a light backfill cushion layer.
In one embodiment of the invention, a heat storage type floor heating backfill layer is provided, and the heat storage type floor heating backfill layer comprises the following components in parts by weight: 30-60 parts of fine stone concrete, 30-60 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive;
in a specific embodiment, the heat accumulating type floor heating backfill layer 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 expanding agent and 2-6 parts of combined additive;
in a specific embodiment, the heat accumulating type floor heating backfill layer comprises the following components in parts by weight: 30-60 parts of fine stone concrete, 40-60 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive;
the graphite tailings are in fine powder, yellow brown and soil-like luster; the fixed carbon content of the graphite tailing is 20-30%, the components are siliceous raw materials, and the graphite tailing contains quartz, mica group minerals, potassium feldspar, calcite, chlorite and hercynite; the graphite tailing particles are fine and easy to disperse.
The fine stone concrete is concrete with the maximum grain diameter of coarse aggregate not more than 15mm.
In a specific embodiment, the swelling agent is an animal protein compound foaming agent; further, the preparation method of the animal protein compound foaming agent comprises the following steps:
(1) Mixing ungula Sus Domestica, sodium bisulphite, thiourea, urea and water, adjusting pH to 5.5, hydrolyzing at 70-80deg.C, rapidly transferring into water bath after reaction, cooling to room temperature, centrifuging, and filtering to obtain filtrate as mother liquor of animal protein foaming agent;
(2) Adding sodium fatty alcohol polyoxyethylene ether sulfate, sodium dodecyl benzene sulfonate, tea saponin, phospholipid and gelatin into the mother solution of the animal protein foaming agent, heating to 40-50deg.C, stirring, dissolving the raw materials completely, and cooling to normal temperature to obtain the final product.
In the application, the animal protein compound foaming agent can also be an animal protein foaming agent with high foaming multiple and high stability which are known in the prior art.
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 main types of hydrolyzed animal hooves, hydrolyzed animal hairs and hydrolyzed blood gums. The foaming principle of the protein foaming agent is the degradation of the protein. The breaking of peptide bonds in protein macromolecules can generate small protein molecules which are easy to dissolve, and as the small protein molecules in the solution are increased, hydrophobic groups are gradually increased, so that the surface tension is reduced, and an interface is formed. In addition, because hydrogen bonds are formed among special groups in molecules, strong hydrogen bond action can ensure that a solution forms a foam liquid film with higher strength, so that the foaming agent generates stable foam.
In a specific embodiment, the combination additive comprises redispersible powders, polyvinyl alcohol, and hydroxypropyl methylcellulose in parts by weight;
preferably, the weight part ratio of the redispersible rubber powder to the polyvinyl alcohol to the hydroxypropyl methylcellulose is 8: 1-2: 1 to 2;
preferably, the redispersible powders are selected from one or more of the following: vinyl acetate and ethylene copolymer powder (Vac/E), vinyl acetate and higher fatty acid vinyl ester copolymer powder (Vac/VeoVa), acrylate and styrene copolymer powder (a/S), vinyl acetate homo-polymer powder (PVac), styrene and butadiene copolymer powder (SBR).
Hydroxypropyl methyl cellulose belongs to one of nonionic cellulose mixed ethers, is a semisynthetic, inactive and viscoelastic polymer, and can be used as a water-retaining agent and a retarder of cement mortar in the construction industry to enable the mortar to have pumpability. The adhesive is used as a binding agent for plastering, stone paste, putty powder or other building materials, so that the smearing property is improved and the operation time is prolonged. The water-retaining property of the adhesive is that the adhesive can not crack due to too fast drying after being smeared, and the strength after hardening is enhanced.
Polyvinyl alcohol is an important chemical raw material for manufacturing polyvinyl acetal, gasoline-resistant pipelines, vinylon, fabric treatment agents, emulsifying agents, paper coatings, adhesives, glues and the like.
According to the floor heating backfill cushion, the redispersible rubber powder is matched with the polyvinyl alcohol and the hydroxypropyl methyl cellulose, so that the floor heating backfill cushion has good fluidity and excellent mechanical property.
In one embodiment of the invention, the invention provides a preparation method of the heat accumulating type floor heating backfill layer, which comprises the following steps:
(1) Mixing an expanding agent, namely an animal protein compound foaming agent, with water, and then foaming by a high-speed foaming machine;
(2) Adding water into fine stone concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding the combined additive and the expanding agent prepared in the step (1), stirring uniformly, and casting and forming.
Preferably, the animal protein compound foaming agent and water are mixed according to the weight ratio of 1: mixing in the ratio of 40-50;
preferably, the rotation speed of the stirring blade during foaming is 700-800 rpm; the foaming time is 3-5 minutes until no big bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
In one embodiment of the invention, the invention provides an application of the heat accumulating type floor heating backfill layer in floor heating.
The invention will be further illustrated with reference to specific examples.
Example 1
The heat accumulation type floor heating backfill cushion layer comprises the following components in parts by weight: fine stone concrete 40, graphite tailing sand 40, expanding agent 4 and combined additive 4;
the preparation method of the heat storage type floor heating backfill layer comprises the following steps:
(1) Firstly, preparing a composite 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, regulating the pH to 5.5, hydrolyzing at 75 ℃ for 6 hours, rapidly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain filtrate, namely animal protein foaming agent mother liquor; 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 mother solution of the animal protein foaming agent, heating to 45 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the composite animal protein foaming agent.
(2) Mixing animal protein compound foaming agent and water according to a weight ratio of 1:40, and then foaming by a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
(3) Adding water into fine stone concrete and graphite tailing sand to be pre-stirred to prepare uniform slurry, then 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 composite animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and forming.
Example 2
The heat accumulation type floor heating backfill cushion layer comprises the following components in parts by weight: fine stone concrete 50, graphite tailing sand 40, expanding agent 5 and combined additive 4;
(1) Firstly, preparing a composite 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, regulating the pH to 5.5, hydrolyzing at 75 ℃ for 6 hours, rapidly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain filtrate, namely animal protein foaming agent mother liquor; 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 mother solution of the animal protein foaming agent, heating to 40 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the composite animal protein foaming agent.
(2) Mixing animal protein compound foaming agent and water according to a weight ratio of 1:50, and then foaming by a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
(3) Adding water into fine stone concrete and graphite tailing sand to be pre-stirred to prepare uniform slurry, then 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 composite animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and forming.
Example 3
The heat accumulation type floor heating backfill cushion layer comprises the following components in parts by weight: fine stone concrete 60, graphite tailing sand 40, expanding agent 5 and combined additive 5;
(1) Preparing a composite 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, regulating the pH to 5.5, hydrolyzing at 75 ℃ for 6 hours, rapidly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain filtrate, namely animal protein foaming agent mother liquor; 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 mother solution of the animal protein foaming agent, heating to 50 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the composite animal protein foaming agent.
(2) Mixing animal protein compound foaming agent and water according to a weight ratio of 1:40, and then foaming by a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
(3) Adding water into fine stone concrete and graphite tailing sand to be pre-stirred to prepare uniform slurry, then 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 composite animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and forming.
Example 1
The heat accumulation type floor heating backfill cushion layer comprises the following components in parts by weight: fine stone concrete 50, graphite tailing sand 50, expanding agent 4 and combined additive 4;
the preparation method of the heat storage type floor heating backfill layer comprises the following steps:
(1) Firstly, preparing a composite 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, regulating the pH to 5.5, hydrolyzing at 75 ℃ for 6 hours, rapidly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain filtrate, namely animal protein foaming agent mother liquor; 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 mother solution of the animal protein foaming agent, heating to 45 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the composite animal protein foaming agent.
(2) Mixing animal protein compound foaming agent and water according to a weight ratio of 1:40, and then foaming by a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
(3) Adding water into fine stone concrete and graphite tailing sand to be pre-stirred to prepare uniform slurry, then 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 composite animal protein foaming agent prepared in the step (1), uniformly stirring, and then casting and forming.
Comparative example 1
The floor heating backfill cushion layer comprises the following components in parts by weight: fine stone concrete 80, expanding agent 4, combined additive 4;
the preparation method of the floor heating backfill cushion layer comprises the following steps:
(1) Firstly, preparing a composite 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, regulating the pH to 5.5, hydrolyzing at 75 ℃ for 6 hours, rapidly transferring to a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain filtrate, namely animal protein foaming agent mother liquor; 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 mother solution of the animal protein foaming agent, heating to 45 ℃, uniformly stirring, and cooling to normal temperature after the raw materials are fully dissolved to obtain the composite animal protein foaming agent.
(2) Mixing animal protein compound foaming agent and water according to a weight ratio of 1:40, and then foaming by a high-speed foaming machine for 4 minutes until no large bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
(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 composite animal protein foaming agent prepared in the step (1), uniformly stirring, and casting and forming.
Comparative example 2
The floor heating backfill cushion layer adopts C20 bean concrete: the cement is ordinary silicate cement with the mark no less than 32.5, the sand adopts medium sand or coarse sand, the mud content is no more than 5%, and the grain size of the stone is 5-15 mm.
The density, compressive strength and heat storage values of the floor heating backfill layers of examples 1-4 and comparative examples 1-2 were summarized as follows:
the table shows that the compression strength of the heat-accumulating type floor heating backfill layer prepared by the method is not reduced compared with that of the backfill layers in the comparison documents 1 and 2 under the condition of reduced density, but the heat accumulating value is greatly improved, and the heat-accumulating type floor heating backfill layer prepared by the method has good heat accumulating effect and mechanical property.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The heat accumulating type floor heating backfill cushion is characterized by comprising the following components in parts by weight: 30-60 parts of fine stone concrete, 30-60 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive; the fixed carbon content of the graphite tailing sand is 20-30%;
the expanding agent is an animal protein compound foaming agent; the preparation method of the animal protein compound foaming agent comprises the following steps:
(1) Mixing pig nail, sodium bisulphite, thiourea, urea and water, regulating the pH to 5.5, hydrolyzing at 70-80 ℃, rapidly transferring into a water bath after the reaction is finished, cooling to normal temperature, centrifuging, and filtering to obtain filtrate, namely animal protein foaming agent mother liquor;
(2) Adding sodium fatty alcohol polyoxyethylene ether sulfate, sodium dodecyl benzene sulfonate, tea saponin, phospholipid and gelatin into the mother solution of the animal protein foaming agent, heating to 40-50deg.C, stirring, dissolving the raw materials completely, and cooling to normal temperature to obtain the compound animal protein foaming agent;
the combined additive comprises redispersible rubber powder, polyvinyl alcohol and hydroxypropyl methyl cellulose in parts by weight; the redispersible rubber powder, polyvinyl alcohol and hydroxypropyl methylcellulose are prepared from the following components in parts by weight: 1-2: 1-2.
2. The heat accumulating type floor heating backfill layer as claimed in claim 1, wherein the heat accumulating type floor heating backfill layer comprises: 30-60 parts of fine stone concrete, 30-50 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive.
3. The heat accumulating type floor heating backfill layer as claimed in claim 1, wherein the heat accumulating type floor heating backfill layer comprises: 30-60 parts of fine stone concrete, 40-60 parts of graphite tailing sand, 2-6 parts of expanding agent and 2-6 parts of combined additive.
4. The heat accumulating floor heating backfill layer of claim 1, wherein the redispersible rubber powder is selected from one or more of the following: vinyl acetate and ethylene copolymer powder, vinyl acetate and higher fatty acid vinyl ester copolymer powder, acrylate and styrene copolymer powder, vinyl acetate homo-polymer powder, and styrene and butadiene copolymer powder.
5. A method for preparing the heat accumulating type floor heating backfill layer according to any one of claims 1 to 4, which is characterized by comprising the following steps:
(1) Mixing an expanding agent, namely an animal protein compound foaming agent, with water, and then foaming by a high-speed foaming machine;
(2) Adding water into fine stone concrete and graphite tailing sand, pre-stirring to prepare uniform slurry, adding the combined additive and the expanding agent prepared in the step (1), stirring uniformly, and casting and forming.
6. The method of claim 5, wherein the animal protein based complex foaming agent and water are mixed according to a ratio of 1: mixing in a ratio of 40-50;
the rotation speed of the stirring blade is 700-800 rpm during the foaming; the foaming time is 3-5 minutes until no big bubbles exist in the foam, the foam particles are tiny and uniform, and the foam volume is not increased.
7. The application of the heat-accumulating type floor heating backfill layer in floor heating according to any one of claims 1 to 4.
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