CN110981349A - Light high-strength muck-based thermal insulation material and preparation method thereof - Google Patents
Light high-strength muck-based thermal insulation material and preparation method thereof Download PDFInfo
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- CN110981349A CN110981349A CN201911314872.4A CN201911314872A CN110981349A CN 110981349 A CN110981349 A CN 110981349A CN 201911314872 A CN201911314872 A CN 201911314872A CN 110981349 A CN110981349 A CN 110981349A
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a light high-strength slag soil-based heat insulation material and a preparation method thereof, wherein the material comprises, by mass, 45-55 parts of slag soil, 0-10 parts of fly ash, 25-35 parts of cement, 10-20 parts of polyphenyl particles, 5-10 parts of foaming agent, 0.5-1.5 parts of water reducing agent and 5-15 parts of aerogel, and the preparation method comprises the following steps: the raw materials are uniformly mixed according to a ratio, then a foaming agent, a water reducing agent and a proper amount of water are added and stirred into slurry, then aerogel is added and stirred into slurry, the slurry is formed, and finally the slurry is placed at the temperature of 20-50 ℃ for maintenance. The invention has the beneficial effects that the polystyrene particles are used as the lightweight aggregate, the hydrogen peroxide is used as the foaming agent to increase the number of the micro-pores of the matrix, and the aerogel modification technology is matched on the basis of the double weight reduction scheme, so that the heat insulation performance of the heat insulation material can be effectively improved, and meanwhile, the better mechanical property is kept; the heat-insulating material has the characteristics of light weight, high strength, heat insulation and energy conservation.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a light high-strength muck-based heat-insulating material and a preparation method thereof.
Background
In recent years, the total amount of construction waste generated in China every year is about 15.5-24 hundred million tons, and accounts for 30-40% of the total amount of urban waste. In the large amount of construction waste, the engineering residual soil accounts for more than 70 percent and is the main component of the whole construction waste. At present, the accumulation amount of the dregs in urban construction engineering in China reaches 100 hundred million tons, and the accumulation amount is increased at the speed of 3 hundred million tons every year. A large amount of building dregs are still treated by adopting the traditional open-air stacking or landfill modes and the like, so that not only is the land resource occupied and the environment polluted, but also serious potential safety hazards exist. According to statistics, the heat transfer capacity of the heat-insulating material in the building industry accounts for more than seven percent of the total energy consumption of the building, so that the development of the novel light high-strength heat-insulating material has important significance for building energy conservation. Inorganic thermal insulation materials have been widely studied due to their low cost, convenient construction, high combustion grade, and the like. However, the heat insulation performance of inorganic heat insulation materials is still in a large gap with that of organic heat insulation materials.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a light high-strength muck-based heat-insulating material and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the light high-strength muck-based heat insulation material is characterized by comprising the following components in parts by weight: 45-55 parts of muck, 0-10 parts of fly ash, 25-35 parts of cement, 10-20 parts of polyphenyl particles, 5-10 parts of foaming agent, 0.5-1.5 parts of water reducing agent, 5-15 parts of aerogel and a proper amount of water.
In a specific embodiment of the invention, the muck is waste muck generated in the building construction process, and the basic composition of the muck comprises SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O。
In a specific embodiment of the invention, the fly ash is waste collected from the bottom of a boiler of a thermal power plant; the basic composition of the fly ash comprises SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2O。
In a specific embodiment of the invention, the cement is portland cement and has a strength rating of 42.5.
In a specific embodiment of the invention, the particle size of the polyphenyl granules is 1-3 mm, and the bulk density is 15-20 kg/m3The thermal conductivity coefficient is less than or equal to 0.042W/(mK).
In one specific embodiment of the invention, the aerogel is Silica (SiO)2) An aerogel.
In a specific embodiment of the invention, the foaming agent is 35% hydrogen peroxide.
In a specific embodiment of the present invention, the water reducing agent is one of polycarboxylic acid water reducing agents.
In addition, the invention also provides a preparation method of the light high-strength muck-based heat-insulating material, which is characterized by comprising the following steps:
the method comprises the following steps: mixing materials, taking dregs, and grinding the dregs into powder by using a ball mill; mixing the raw materials according to the proportion: 45-55 parts of muck, 0-10 parts of fly ash, 25-35 parts of cement and 10-20 parts of polyphenyl particles;
step two: foaming, namely adding 5-10 parts of foaming agent, 0.5-1.5 parts of water reducing agent and a proper amount of water into the mixture obtained in the first step, and stirring in a stirrer; slowly stirring for one minute at the rotating speed of 100-200 r/min and quickly stirring for one minute at the rotating speed of 250-350 r/min during stirring;
step three: modifying, namely adding 5-15 parts of aerogel into the slurry obtained in the step two, and stirring in a stirrer; slowly stirring for one minute at the rotating speed of 100-200 r/min, quickly stirring for one minute at the rotating speed of 250-350 r/min, and finally putting the mixture into a mold;
step four: and (5) curing, namely putting the test mold obtained in the step three at the temperature of 20-50 ℃ for curing for 24h, and demolding to obtain the light heat-insulating material.
Research shows that the pore structure distribution and the property of the filler are main factors influencing the compressive strength and the heat conductivity coefficient of the wall heat-insulating material. The pore structure distribution of the matrix can be improved through a foaming technology, the heat conductivity coefficient of the matrix can be reduced by adding the organic filling material, and the comprehensive performance of the heat-insulating material can be effectively improved by reasonably matching the two methods. Therefore, the light-weight high-strength muck-based thermal insulation material is obtained by taking the utilization of industrial solid wastes such as engineering muck, fly ash and the like as a starting point, adding cement as a cementing material, hydrogen peroxide as a foaming agent, polyphenyl particles as aggregate and silica aerogel as a modifier. The invention adopts polyphenyl granules as lightweight aggregate, which is a first weight-reducing scheme; in addition, hydrogen peroxide is used as a foaming agent to increase the number of micro-holes of the matrix, which is a second weight reduction scheme. The double weight reduction scheme is matched with an aerogel modification technology, so that the heat insulation performance of the heat insulation material can be effectively improved. The heat-insulating material prepared according to the invention has the characteristics of light weight, high strength, heat insulation and energy saving.
Compared with the prior art, the invention has the beneficial effects that; the invention takes the engineering dregs as the main raw material, has large mixing amount, not only can solve the problem of piling up the engineering dregs, but also can reasonably utilize the engineering dregs as resources, and has great significance for environmental protection; the heat insulation material prepared by the invention can effectively improve the heat insulation performance of the heat insulation material through a double weight reduction scheme and an aerogel modification technology; the preparation method of the heat-insulating material has the advantages of simple operation, high yield, excellent product performance and obvious economic and social benefits.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. The examples are carried out on the premise of the technical scheme of the invention, and are not intended to limit the implementation mode of the invention. The following examples are given to illustrate the preferred embodiments of the present invention, and all obvious variations and modifications are within the scope of the present invention.
Example 1
The muck is red brown from waste soil generated in the construction process of subways in Tianjin, and the basic chemical composition of the muck is shown in Table 1.
The fly ash was obtained from the thermal power plant of Shandong Shouguang Chenming group Co., Ltd., black, and its basic chemical composition is shown in Table 1.
The cement is from Tangshan Jidong cement Co Ltd, ordinary Portland cement P.O 42.5 grade.
Silicon dioxide (SiO)2) Aerogels were sourced from cabot corporation, usa.
The polycarboxylic acid type water reducing agent is from Tianjin phylon concrete admixture GmbH.
TABLE 1
Taking dregs, and grinding the dregs into powder by using a ball mill; mixing the raw materials according to the following mixture ratio: 50 parts of muck, 5 parts of fly ash, 30 parts of cement and 15 parts of polyphenyl granules.
And adding 7 parts of foaming agent, 1.2 parts of water reducing agent and a proper amount of water into the mixture, placing the mixture into a stirrer for stirring, slowly stirring the mixture for one minute at the rotating speed of 150r/min, and quickly stirring the mixture for one minute at the rotating speed of 300 r/min.
Adding 10 parts of aerogel into the slurry, and stirring in a stirrer; during stirring, the mixture is slowly stirred for one minute at the rotating speed of 150r/min and then quickly stirred for one minute at the rotating speed of 300 r/min. And finally, putting the mixture into a mold.
And (3) placing the test mold at 25 +/-2 ℃ for curing for 24 hours, and demolding to obtain the light heat-insulating material.
Example 2
The starting materials were as in example 1.
Taking dregs, and grinding the dregs into powder by using a ball mill; mixing the raw materials according to the following mixture ratio: 45 parts of residue soil, 5 parts of fly ash, 35 parts of cement and 10 parts of polyphenyl granules.
Adding 5 parts of foaming agent, 1.1 parts of water reducing agent and a proper amount of water into the mixture, and stirring in a stirrer; during stirring, the mixture is slowly stirred for one minute at the rotating speed of 150r/min and then quickly stirred for one minute at the rotating speed of 300 r/min.
Adding 15% of aerogel into the slurry, and stirring in a stirrer; during stirring, the mixture is slowly stirred for one minute at the rotating speed of 150r/min and then quickly stirred for one minute at the rotating speed of 300 r/min. And finally, putting the mixture into a mold.
And (3) placing the test mold at the temperature of 20 +/-2 ℃ for curing for 24 hours, and demolding to obtain the light heat-insulating material.
Example 3
The starting materials were as in example 1.
Taking dregs, and grinding the dregs into powder by using a ball mill; mixing the raw materials according to the following mixture ratio: 50 parts of muck, 5 parts of fly ash, 35 parts of cement and 10 parts of polyphenyl granules.
Adding 8 parts of foaming agent, 1.3 parts of water reducing agent and a proper amount of water into the mixture, and stirring in a stirrer; during stirring, the mixture is slowly stirred for one minute at the rotating speed of 150r/min and then quickly stirred for one minute at the rotating speed of 300 r/min.
Adding 15 parts of aerogel into the slurry, and stirring in a stirrer; during stirring, the mixture is slowly stirred for one minute at the rotating speed of 150r/min and then quickly stirred for one minute at the rotating speed of 300 r/min. And finally, putting the mixture into a mold.
And (3) placing the test mold at the temperature of 20 +/-2 ℃ for curing for 24 hours, and demolding to obtain the light heat-insulating material.
The performance test results of the light high-strength residue soil-based heat-insulating material prepared in the embodiments 1-3 are shown in table 2.
TABLE 2
From the test results, the average compressive strength of the light high-strength heat-insulating material prepared in the embodiments 1 to 3 is about 4.2MPa, and the dry density is 353kg/m3The thermal conductivity coefficient is about 0.0707W/(m.K) on average, and the light-weight high-strength low-thermal conductivity thermal insulation material has the characteristics of light weight, high strength and low thermal conductivity; the heat insulation performance is excellent, the combustion grade is A grade, and the fire resistance and flame retardance are excellent.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be within the scope of the present invention without any changes and modifications made by the inventive work.
Claims (9)
1. A light high-strength muck-based heat insulation material is characterized by comprising the following components in parts by weight: 45-55 parts of muck, 0-10 parts of fly ash, 25-35 parts of cement, 10-20 parts of polyphenyl particles, 5-10 parts of foaming agent, 0.5-1.5 parts of water reducing agent, 5-15 parts of aerogel and a proper amount of water.
2. The light high-strength residue soil-based heat insulation material as claimed in claim 1, characterized in that: the residue soil is waste soil generated in the building construction process.
3. The light high-strength residue soil-based heat insulation material as claimed in claim 1, characterized in that: the fly ash is waste collected from the bottom of a boiler of a thermal power plant.
4. The light high-strength residue soil-based heat insulation material as claimed in claim 1, characterized in that: the cement is ordinary portland cement, and the strength grade is 42.5.
5. The light high-strength slag soil base protector as claimed in claim 1The temperature material is characterized in that: the particle size of the polyphenyl granules is 1-3 mm, and the bulk density is 15-20 kg/m3The thermal conductivity coefficient is less than or equal to 0.042W/(mK).
6. The light high-strength residue soil-based heat insulation material as claimed in claim 1, characterized in that: the aerogel is silicon dioxide (SiO)2) An aerogel.
7. The light high-strength residue soil-based heat insulation material as claimed in claim 1, characterized in that: the foaming agent is 35% hydrogen peroxide.
8. The light high-strength residue soil-based heat insulation material as claimed in claim 1, characterized in that: the water reducing agent is one of polycarboxylic acid water reducing agents.
9. The preparation method of the light high-strength muck-based heat-insulating material is characterized by comprising the following steps of:
the method comprises the following steps: mixing materials, taking dregs, and grinding the dregs into powder by using a ball mill; mixing the raw materials according to the proportion: 45-55 parts of muck, 0-10 parts of fly ash, 25-35 parts of cement and 10-20 parts of polyphenyl particles;
step two: foaming, namely adding 5-10 parts of foaming agent, 0.5-1.5 parts of water reducing agent and a proper amount of water into the mixture obtained in the first step, and stirring in a stirrer; slowly stirring for one minute at the rotating speed of 100-200 r/min and quickly stirring for one minute at the rotating speed of 250-350 r/min during stirring;
step three: modifying, namely adding 5-15 parts of aerogel into the slurry obtained in the step two, and stirring in a stirrer; slowly stirring for one minute at the rotating speed of 100-200 r/min, quickly stirring for one minute at the rotating speed of 250-350 r/min, and finally putting the mixture into a mold;
step four: and (5) curing, namely putting the test mold obtained in the step three at the temperature of 20-50 ℃ for curing for 24h, and demolding to obtain the light heat-insulating material.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111470834A (en) * | 2020-04-15 | 2020-07-31 | 连云港华通建筑工程有限公司 | Preparation method of ecological solidified light soil and ecological solidified light soil |
| CN111689727A (en) * | 2020-04-30 | 2020-09-22 | 吴江笨鸟墙面科技有限公司 | Preparation method of foam concrete thermal insulation brick |
| CN113735551A (en) * | 2021-09-07 | 2021-12-03 | 中国建筑第五工程局有限公司 | Residue soil base baking-free light thermal insulation material and preparation method and application thereof |
| CN114044630A (en) * | 2021-12-14 | 2022-02-15 | 深圳市华威环保建材有限公司 | Regenerated porous glass ceramic and preparation method and application thereof |
| CN114656215A (en) * | 2022-04-02 | 2022-06-24 | 山西阳中新材有限责任公司 | Aerogel inorganic composite A-grade polyphenyl non-combustible heat preservation plate and preparation method thereof |
| CN115259785A (en) * | 2022-07-01 | 2022-11-01 | 江苏阿路美格新材料股份有限公司 | Method for preparing aerogel polyphenyl insulation board based on wet-mixed material stirring technology |
| CN115259795A (en) * | 2022-08-09 | 2022-11-01 | 武汉理工大学 | Preparation method of muck-based foam concrete building block |
| CN117003529A (en) * | 2023-10-07 | 2023-11-07 | 南京三合建环保科技有限公司 | Self-compacting ready-mixed fluid solidified soil and preparation method and application thereof |
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| CN111470834A (en) * | 2020-04-15 | 2020-07-31 | 连云港华通建筑工程有限公司 | Preparation method of ecological solidified light soil and ecological solidified light soil |
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| CN113735551A (en) * | 2021-09-07 | 2021-12-03 | 中国建筑第五工程局有限公司 | Residue soil base baking-free light thermal insulation material and preparation method and application thereof |
| CN114044630A (en) * | 2021-12-14 | 2022-02-15 | 深圳市华威环保建材有限公司 | Regenerated porous glass ceramic and preparation method and application thereof |
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| CN115259795A (en) * | 2022-08-09 | 2022-11-01 | 武汉理工大学 | Preparation method of muck-based foam concrete building block |
| CN117003529A (en) * | 2023-10-07 | 2023-11-07 | 南京三合建环保科技有限公司 | Self-compacting ready-mixed fluid solidified soil and preparation method and application thereof |
| CN117003529B (en) * | 2023-10-07 | 2024-04-26 | 南京三合建环保科技有限公司 | Self-compacting ready-mixed fluid solidified soil and preparation method and application thereof |
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Application publication date: 20200410 |
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