CN108314381B - Low-water absorption foam concrete heat-insulating layer and preparation method thereof - Google Patents
Low-water absorption foam concrete heat-insulating layer and preparation method thereof Download PDFInfo
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- CN108314381B CN108314381B CN201810145211.2A CN201810145211A CN108314381B CN 108314381 B CN108314381 B CN 108314381B CN 201810145211 A CN201810145211 A CN 201810145211A CN 108314381 B CN108314381 B CN 108314381B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a low-water absorption foam concrete heat insulation layer and a preparation method thereof, wherein the low-water absorption foam concrete heat insulation layer comprises the following raw materials in parts by weight: 10-70 parts of deionized water, 1.2-12 parts of lipid compounds, 0.08-0.8 part of emulsifying agents, 4-20 parts of linear phenolic resins, 0.08-8 parts of resin curing agents, 0.08-0.4 part of silane coupling agents, 0.08-0.4 part of nonionic surfactants, 1000 parts of cement, 10-40 parts of foam stabilizers, 1-8 parts of water reducing agents, 1-8 parts of water retention agents, 1-200 parts of admixtures, 20-70 parts of chemical foaming agents and 800 parts of blending water. The invention reduces the water absorption of the foam concrete, improves the heat insulation performance of the foam concrete ground heating heat insulation layer and improves the strength of the foam concrete heat insulation layer.
Description
[ technical field ] A method for producing a semiconductor device
The invention particularly relates to a low-water absorption foam concrete heat-insulating layer and a preparation method thereof.
[ background of the invention ]
In recent years, floor heating develops rapidly in Asia areas, especially in northern areas of China, due to humanized characteristics of comfort, energy conservation, health, household metering, chamber temperature control and the like. The ground heating heat insulation layer is a structural layer which is laid on the site and used for blocking heat from transferring downwards in ground heating, and the ineffective heat loss is reduced. Polystyrene foam plastic plates (polystyrene plates for short) are adopted in the early stage of the ground heating heat insulation layer, although the polystyrene plates have the advantages of light weight, low heat conductivity coefficient and the like, the polystyrene plates are easy to burn and can reach the grade of B2, and the consequences of a fire disaster in a high-rise building can be imagined. The foam concrete heat insulation layer has the advantages of non-combustibility, environmental protection, no peculiar smell, high bearing strength, long shelf life, good sound insulation effect and the like, and tends to replace foam plastic heat insulation layers such as polystyrene and the like at present.
The foam concrete heat insulation layer constructed in the prior art has more pores and higher water absorption rate, and the heat conductivity coefficient is increased after moisture absorption, so that the heat insulation performance of the foam concrete is reduced, and the foam concrete heat insulation layer becomes a disadvantageous factor for restricting the development of the foam concrete heat insulation layer.
[ summary of the invention ]
The invention aims to solve one technical problem and provides a low-water absorption foam concrete heat insulation layer.
The invention is realized by the following steps: a low-water absorption foam concrete heat insulation layer comprises the following raw materials in parts by weight:
20-25 parts of deionized water, 1.2-12 parts of lipid compounds, 0.08-0.8 part of emulsifying agents, 4-20 parts of linear phenolic resins, 0.08-8 parts of resin curing agents, 0.08-0.4 part of silane coupling agents, 0.08-0.4 part of nonionic surfactants, 1000 parts of cement, 10-15 parts of foam stabilizers, 1-8 parts of water reducing agents, 1-8 parts of water retention agents, 1-200 parts of admixtures, 20-70 parts of chemical foaming agents and 800 parts of blending water.
Further, the lipid compound is one or more of tributyl phosphate, vinyl acetate and ethyl orthosilicate.
Further, the emulsifier is one or more of tween-20, tween-40 and tween-60.
Further, the resin curing agent is hexamethylenetetramine.
Further, the silane coupling agent is one or more of ethyl orthosilicate, methyltrimethoxysilane and methyltriethoxysilane.
Further, the nonionic surfactant is one or more of octyl phenol polyoxyethylene ether, nonyl phenol polyoxyethylene ether and fatty acid polyoxyethylene ester.
Further, the cement is 42.5-grade portland cement, ordinary portland cement or sulphoaluminate cement; the foam stabilizer is calcium stearate; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the water-retaining agent is water-soluble cellulose ether or polyacrylamide; the admixture is high-quality fly ash or slag with more than II level.
Further, the chemical foaming agent is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and alpha-sodium alkenyl sulfonate.
The second technical problem to be solved by the invention is to provide a preparation method of a low water absorption foam concrete heat insulation layer.
The invention is realized by the following steps: the preparation method of the low water absorption foam concrete heat insulation layer comprises the following steps:
step 1: adding deionized water, lipid compounds and emulsifier into a high-speed stirring dispersion machine, stirring uniformly to obtain an oil-in-water dispersion system, heating, slowly adding novolac resin, and adding resin curing agent; adjusting the pH value of the reaction system to be acidic, heating, curing and filtering to remove a solution, mixing and adding a silane coupling agent and a surfactant, and uniformly stirring to obtain a foam concrete water repellent;
step 2: adding cement, a foam stabilizer, a water reducing agent, a water-retaining agent, an admixture and mixing water into a stirrer, and uniformly stirring for 2-5 min to prepare a neat paste;
and step 3: adding a chemical foaming agent and a foam concrete water repellent into the clean slurry, and mixing and stirring for 30 seconds to obtain foam concrete;
and 4, step 4: and pumping, casting in situ, maintaining and forming the foam concrete to obtain the foam concrete heat insulation layer.
The invention has the advantages that: the water absorption rate of the foam concrete is reduced, the heat insulation performance of the foam concrete ground heating heat insulation layer is improved, and the strength of the foam concrete heat insulation layer is improved.
[ detailed description ] embodiments
The invention is further described with reference to the following specific examples, wherein the raw materials and the proportioning parameters of the examples are shown in the following tables:
TABLE 1 materials (in parts by weight) of the examples
For each of the above examples, the method for preparing a low water absorption foam concrete thermal insulation layer was as follows:
step 1: adding deionized water (20 parts of deionized water in examples 1 and 2, and 25 parts of deionized water in example 3), lipid compounds and an emulsifier into a high-speed stirring dispersion machine, uniformly stirring to form a stable emulsifying dispersion system, heating the reaction system to 80-100 ℃, slowly adding novolac resin, and adding a resin curing agent, namely hexamethylenetetramine; adjusting and keeping the pH value of a reaction system at 4-5 by using 7mol/L hydrochloric acid, heating and curing at 80-100 ℃ for 1-4 h to obtain resin microspheres, filtering out a solution, mixing and adding a silane coupling agent and a surfactant, and uniformly stirring to obtain a foam concrete water repellent;
step 2: adding cement, a foam stabilizer, namely calcium stearate (10 parts in examples 1 and 3 and 15 parts in example 2), a water reducing agent, a water retaining agent, an admixture and mixing water (500 parts in examples 1 and 2 and 650 parts in example 3) into a stirrer, and uniformly stirring for 2-5 min to prepare neat paste;
and step 3: adding a chemical foaming agent and a foam concrete water repellent into the clean slurry, and mixing and stirring for 30 seconds to obtain foam concrete;
and 4, step 4: and pumping, casting in situ, maintaining and forming the foam concrete to obtain the foam concrete heat insulation layer.
According to the industry standard JG/T266-2011 foam concrete, the heat conductivity coefficient is 0.067W/(m.K), the material is not combusted, the volume water absorption is 5.5 percent, and the compressive strength is 0.55 MPa. The heat conductivity coefficient of the foam concrete without the water repellent reaches 0.145W/(m.K), the volume water absorption rate is 26.0 percent, and the compressive strength is 0.47 MPa; example 2 found that the thermal conductivity was 0.058W/(m.K), no combustion, 5.8% of volume water absorption, and 0.54MPa of compressive strength. The heat conductivity coefficient of the foam concrete without the water repellent reaches 0.156W/(m.K), the volume water absorption is 26.7 percent, and the compressive strength is 0.48 MPa; example 3 found a thermal conductivity of 0.058W/(m.K), no combustion, a volumetric water absorption of 5.8%, and a compressive strength of 0.54 MPa. The foam concrete without the water repellent has a heat conductivity coefficient of 0.146W/(m.K), a volume water absorption of 26.8 percent and a compressive strength of 0.53 MPa.
According to the low-water absorption foam concrete, the lipid compounds in the water repellent are not directly mixed with the foam concrete mixture, but are added into the foam concrete slurry under the wrapping of the thermosetting resin, so that the mixture is more uniform and the contact is more sufficient, after the water repellent is added into the foam concrete slurry, under the action of cement hydration heat, the temperature of the foam concrete slurry is increased, the lipid compounds in the water repellent are volatilized and attached to the interior of the foam concrete, the foam concrete is changed from a hydrophilic state to a hydrophobic state, and the water absorption rate is reduced. The resin microspheres become hollow structures after the lipid compounds are volatilized, the diameters of the hollow structures are smaller than the diameters of air bubbles in the foam concrete, the water absorption rate of the foam concrete is greatly reduced under the action of the two factors, the heat insulation performance is improved, and the strength of the foam concrete is improved to a certain extent.
The invention has the advantages of low cost of raw materials, simple production process, low labor intensity and fast engineering progress, can be constructed by self-leveling, levels the originally rough and uneven floor structure layer and omits the procedure of leveling layer smearing. The foam concrete floor heating heat insulation layer, the floor structure layer and the filling floor layer are all cement products, and the foam concrete floor heating heat insulation layer, the floor structure layer and the filling floor layer are integrated after construction, are firmly combined, and are not easy to generate ground hollowing cracks.
Claims (7)
1. A low water absorption foam concrete heat insulation layer is characterized in that: the feed comprises the following raw materials in parts by weight:
20-25 parts of deionized water, 1.2-12 parts of lipid compounds, 0.08-0.8 part of emulsifying agents, 4-20 parts of linear phenolic resins, 0.08-8 parts of resin curing agents, 0.08-0.4 part of silane coupling agents, 0.08-0.4 part of nonionic surfactants, 1000 parts of cement, 10-15 parts of foam stabilizers, 1-8 parts of water reducing agents, 1-8 parts of water retention agents, 1-200 parts of admixtures, 20-70 parts of chemical foaming agents and 800 parts of mixing water;
the preparation method of the low water absorption foam concrete heat insulation layer comprises the following steps:
step 1: adding deionized water, lipid compounds and emulsifier into a high-speed stirring dispersion machine, stirring uniformly to obtain an oil-in-water dispersion system, heating, slowly adding novolac resin, and adding resin curing agent; adjusting the pH value of the reaction system to be acidic, heating, curing and filtering to remove a solution, mixing and adding a silane coupling agent and a surfactant, and uniformly stirring to obtain a foam concrete water repellent;
step 2: adding cement, a foam stabilizer, a water reducing agent, a water-retaining agent, an admixture and mixing water into a stirrer, and uniformly stirring for 2-5 min to prepare a neat paste;
and step 3: adding a chemical foaming agent and a foam concrete water repellent into the clean slurry, and mixing and stirring for 30 seconds to obtain foam concrete;
and 4, step 4: pumping, casting in situ and curing the foam concrete to obtain a foam concrete heat insulation layer; the lipid compound is one or more of tributyl phosphate, vinyl acetate and ethyl orthosilicate.
2. The low water absorption foamed concrete insulation layer of claim 1, wherein: the emulsifier is one or more of tween-20, tween-40 and tween-60.
3. The low water absorption foamed concrete insulation layer of claim 1, wherein: the resin curing agent is hexamethylenetetramine.
4. The low water absorption foamed concrete insulation layer of claim 1, wherein: the silane coupling agent is one or more of ethyl orthosilicate, methyltrimethoxysilane and methyltriethoxysilane.
5. The low water absorption foamed concrete insulation layer of claim 1, wherein: the nonionic surfactant is one or more of octyl phenol polyoxyethylene ether, nonyl phenol polyoxyethylene ether and fatty acid polyoxyethylene ester.
6. The low water absorption foamed concrete insulation layer of claim 1, wherein: the cement is 42.5-grade portland cement, ordinary portland cement or sulphoaluminate cement; the foam stabilizer is calcium stearate; the water reducing agent is a naphthalene-based high-efficiency water reducing agent; the water-retaining agent is water-soluble cellulose ether or polyacrylamide; the admixture is fly ash or slag with more than II level.
7. The low water absorption foamed concrete insulation layer of claim 1, wherein: the chemical foaming agent is one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and alpha-sodium alkenyl sulfonate.
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| CN201810145211.2A CN108314381B (en) | 2018-02-12 | 2018-02-12 | Low-water absorption foam concrete heat-insulating layer and preparation method thereof |
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| CN108314381A CN108314381A (en) | 2018-07-24 |
| CN108314381B true CN108314381B (en) | 2020-12-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109305786A (en) * | 2018-09-07 | 2019-02-05 | 怀宁建国混凝土制品有限责任公司 | A kind of high-strength cracking-resistant foamed cement |
| CN109279834A (en) * | 2018-09-13 | 2019-01-29 | 怀宁建国混凝土制品有限责任公司 | A kind of shock resistance waterproof foamed cement and preparation method thereof |
| CN111502276B (en) * | 2020-04-21 | 2022-09-06 | 湖南鑫迪建设工程有限公司 | Environment-friendly waterproof heat-preservation construction method |
| CN112279676B (en) * | 2020-11-06 | 2022-07-12 | 江苏恒达工程检测有限公司 | High-strength lightweight concrete for pipeline repair and preparation method thereof |
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| CN101497533A (en) * | 2009-02-27 | 2009-08-05 | 中国科学院武汉岩土力学研究所 | Foam concrete and preparing process thereof |
| CN102153364A (en) * | 2011-05-04 | 2011-08-17 | 上海市建筑科学研究院(集团)有限公司 | Flame retardant heat-insulation foam concrete and preparation method thereof |
| CN102260093A (en) * | 2011-05-16 | 2011-11-30 | 北京翰高兄弟科技发展有限公司 | Chemical foaming method for preparing foamed concrete |
| CN104150951A (en) * | 2014-08-25 | 2014-11-19 | 武汉理工大学 | Low-water-absorption foamed concrete and preparation method thereof |
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2018
- 2018-02-12 CN CN201810145211.2A patent/CN108314381B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497533A (en) * | 2009-02-27 | 2009-08-05 | 中国科学院武汉岩土力学研究所 | Foam concrete and preparing process thereof |
| CN102153364A (en) * | 2011-05-04 | 2011-08-17 | 上海市建筑科学研究院(集团)有限公司 | Flame retardant heat-insulation foam concrete and preparation method thereof |
| CN102260093A (en) * | 2011-05-16 | 2011-11-30 | 北京翰高兄弟科技发展有限公司 | Chemical foaming method for preparing foamed concrete |
| CN104150951A (en) * | 2014-08-25 | 2014-11-19 | 武汉理工大学 | Low-water-absorption foamed concrete and preparation method thereof |
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