CN114409326A - High-strength anti-cracking cement-based inorganic light thermal insulation material and preparation method thereof - Google Patents
High-strength anti-cracking cement-based inorganic light thermal insulation material and preparation method thereof Download PDFInfo
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- CN114409326A CN114409326A CN202111543932.7A CN202111543932A CN114409326A CN 114409326 A CN114409326 A CN 114409326A CN 202111543932 A CN202111543932 A CN 202111543932A CN 114409326 A CN114409326 A CN 114409326A
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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
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2053—Earthquake- or hurricane-resistant 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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
- C04B2111/52—Sound-insulating materials
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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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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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
- C04B2201/20—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
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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
Abstract
The invention relates to a high-strength anti-cracking cement-based inorganic light heat-insulating material and a preparation method thereof. The invention uses the cloud concrete stone as the heat-insulating aggregate to prepare the light heat-insulating material, and the cloud concrete stone has the advantages of light weight, heat preservation and storage, sound absorption and insulation, fire resistance, shock resistance, seepage prevention and freeze resistance, so that the material has good heat-insulating property. In addition, the cloud concrete stone particles have high strength and the capability of repeatedly absorbing and releasing water, so that the internal curing time of the concrete material can be prolonged, and the strength of the material can be improved. Finally, the crack resistance of the material can be enhanced by adding the fibrous gypsum whiskers, and the material has excellent comprehensive performance.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to a high-strength anti-cracking cement-based inorganic light thermal insulation material and a preparation method thereof.
Background
Building energy conservation is an important aspect for realizing energy conservation and emission reduction, and wall heat preservation is an important measure for building energy conservation. The light heat-insulating mortar in the market at present has various types, inorganic heat-insulating mortar and organic heat-insulating mortar have different performances, and many heat-insulating mortars have insufficient crack resistance. The inorganic heat-insulating mortar mainly has good heat-insulating effect by using the expanded perlite as heat-insulating aggregate, but the heat-insulating mortar has the defects of low strength, easy cracking and the like due to the low strength of the expanded perlite. The poor fire resistance of the organic thermal insulation mortar is a fatal defect.
Patent ZL201511015604.4 hollow micropore inorganic thermal insulation mortar provides hollow micropore inorganic thermal insulation mortar, which comprises the following components in parts by weight: 40-60 parts of ordinary portland cement, 5-10 parts of silica fume, 10-15 parts of nickel slag powder, 25-35 parts of expanded perlite micro powder, 0.1-1 part of redispersible latex powder, 0.1-1 part of hydroxypropyl methyl cellulose ether and 0.1-1 part of polypropylene fiber. The heat-insulating brick has the excellent performances of good heat-insulating property, good construction property, no cracking, no hollowing, fire resistance, low cost and the like. However, the aggregate is mainly mortar using expanded perlite as the thermal insulation aggregate, and the thermal insulation mortar has low strength due to the low strength of the expanded perlite. The invention with publication number CN102584122A 'A building thermal insulation mortar' discloses a building thermal insulation mortar, which takes gypsum whisker and expanded perlite as lightweight aggregate and comprises the following materials: gypsum whisker, expanded perlite, cement, glass fiber and an additive, and the finished product is prepared by uniformly stirring the above materials. Has good heat preservation effect. The building thermal insulation mortar with the expanded perlite as the lightweight aggregate has low strength due to the low strength of the expanded perlite.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-strength anti-cracking cement-based inorganic light thermal insulation material and a preparation method thereof.
The invention provides a high-strength anti-cracking cement-based inorganic light heat-insulating material which comprises the following components in parts by weight:
the total material consumption refers to the sum of the mass of cement, fly ash, quartz sand and cloud concrete stone.
The particle size of the quartz sand is 1-2 mm.
The particle size of the cloud concrete stone is 3-4 mm.
The water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
The expanding agent is a plastic expanding agent.
The invention also provides a preparation method of the high-strength anti-cracking cement-based inorganic light thermal insulation material, which comprises the following steps:
placing all the ingredients into a stirrer and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; adding water twice and uniformly stirring, wherein two thirds of the water is added for the first time, and the rest water is added for the second time; the stirring time is not less than 7 minutes, and the cement-based inorganic light heat-insulating material is obtained.
Advantageous effects
The invention uses the cloud concrete stone as the heat-insulating aggregate to prepare the light heat-insulating material, and the cloud concrete stone has the advantages of light weight, heat preservation and storage, sound absorption and insulation, fire resistance, shock resistance, seepage prevention and freeze resistance, so that the material has good heat-insulating property. In addition, the cloud concrete stone particles have high strength and the capability of repeatedly absorbing and releasing water, so that the internal curing time of the concrete material can be prolonged, and the strength of the material can be improved. However, the cloud concrete stone has the characteristics of micropores and large water absorption capacity, so that the concrete material prepared by using the cloud concrete stone as the aggregate is easy to crack and shrink, the shrinkage can be avoided by adding the expanding agent, and finally, the cracking resistance of the material can be enhanced by adding the fibrous gypsum whisker, so that the cloud concrete stone has excellent comprehensive performance.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The raw materials for the examples and comparative examples are as follows:
cement: P.O 42.5.5 Portland Cement, Taicang conch Cement Co.
Fly ash: grade II ash provided by Shanghai stone cave entrance power plants.
Quartz sand: the grain diameter is 1-2mm, and is provided by Shanghai Zhongyu environmental engineering science and technology Limited.
Cloud concrete stone: the grain diameter is 3-4mm, and is provided by the scientific and technological company of new moderate-strength materials.
Gypsum whisker: anhydrous gypsum whisker, provided by the institute of Maanshan Square and round nanometer.
Water reducing agent: a polycarboxylic acid high-efficiency water reducing agent provided by Wacker chemical (China) Co.
Biological glue: model number VR-1, available from Shunhua corporation, Shanghai, Inc.
Swelling agent: plastic swelling agents, available from wacker chemical (china) ltd.
Defoaming agent: model number SD850, supplied by Wacker chemical (China) Co.
The water is tap water in municipal pipelines.
Example 1
The specific formula is as follows: 20 parts by mass of cement, 10 parts by mass of fly ash, 10 parts by mass of quartz sand, 60 parts by mass of cloud concrete stone, gypsum whiskers with the material amount of 0.5%, a water reducing agent with the material amount of 0.2%, biogum with the material amount of 0.002%, a defoaming agent with the material amount of 0.05%, an expanding agent with the material amount of 0.03% and water with the material amount of 0.25 times.
Respectively measuring cement, fly ash, cloud concrete stone, quartz sand, a water reducing agent, biological glue, a defoaming agent, gypsum whiskers, an expanding agent and the like; placing the ingredients into a stirrer, and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; the obtained material is added with water twice and stirred evenly, two thirds of the water is added for the first time, and the rest water is added for the second time. Stirring for not less than 7 minutes to obtain the cement-based inorganic light heat-insulating material; performing pressure plastering or pouring on the obtained cement-based inorganic lightweight heat-insulating material for construction, performing standard maintenance for 28 days to detect performance indexes, and keeping the dry density of 855kg/m32.1MPa of bonding strength, 29.6MPa of compressive strength and 0.912W/(m) of thermal conductivity coefficient2·K)。
Example 2
The specific formula is as follows: 20 parts by mass of cement, 10 parts by mass of fly ash, 15 parts by mass of quartz sand, 55 parts by mass of cloud concrete stone, gypsum whiskers with the material amount of 0.5%, a water reducing agent with the material amount of 0.2%, biogum with the material amount of 0.002%, a defoaming agent with the material amount of 0.05%, an expanding agent with the material amount of 0.03% and water with the material amount of 0.25 times.
Respectively measuring cement, fly ash, cloud concrete stone, quartz sand, a water reducing agent, biological glue, a defoaming agent, gypsum whiskers, an expanding agent and the like; placing the ingredients into a stirrer, and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; the obtained material is added with water twice and stirred evenly, two thirds of the water is added for the first time, and the rest water is added for the second time. Stirring for not less than 7 minutes to obtain the cement-based inorganic light heat-insulating material; performing pressure plastering or pouring on the obtained cement-based inorganic lightweight heat-insulating material for construction, performing standard maintenance for 28 days to detect performance indexes, and performing dry density of 910kg/m32.3MPa of bonding strength, 30.8MPa of compressive strength and 0.956W/(m) of thermal conductivity coefficient2·K)。
Example 3
The specific formula is as follows: 25 parts by mass of cement, 5 parts by mass of fly ash, 10 parts by mass of quartz sand, 60 parts by mass of cloud concrete stone, gypsum whiskers with the material amount of 0.5%, a water reducing agent with the material amount of 0.2%, biogum with the material amount of 0.002%, a defoaming agent with the material amount of 0.05%, an expanding agent with the material amount of 0.03% and water with the material amount of 0.25 times.
Respectively measuring cement, fly ash, cloud concrete stone, quartz sand, a water reducing agent, biological glue, a defoaming agent, gypsum whiskers, an expanding agent and the like; placing the ingredients into a stirrer, and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; the obtained material is added with water twice and stirred evenly, two thirds of the water is added for the first time, and the rest water is added for the second time. Stirring for not less than 7 minutes to obtain the cement-based inorganic light heat-insulating material; performing pressure plastering or pouring on the obtained cement-based inorganic lightweight heat-insulating material for construction, performing standard maintenance for 28 days to detect performance indexes, and determining the dry density of 846kg/m32.4MPa of bonding strength, 32.1MPa of compressive strength and 0.903W/(m) of thermal conductivity coefficient2·K)。
Example 4
The specific formula is as follows: 25 parts by mass of cement, 5 parts by mass of fly ash, 15 parts by mass of quartz sand, 55 parts by mass of cloud concrete stone, gypsum whiskers with the material amount of 0.5%, a water reducing agent with the material amount of 0.2%, biogum with the material amount of 0.002%, a defoaming agent with the material amount of 0.05%, an expanding agent with the material amount of 0.03% and water with the material amount of 0.25 times.
Respectively measuring cement, fly ash, cloud concrete stone, quartz sand, a water reducing agent, biological glue, a defoaming agent, gypsum whiskers, an expanding agent and the like; placing the ingredients into a stirrer, and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; the obtained material is added with water twice and stirred evenly, two thirds of the water is added for the first time, and the rest water is added for the second time. Stirring for not less than 7 minutes to obtain the cement-based inorganic light heat-insulating material; the obtained cement-based inorganic lightweight heat-insulating material is constructed by pressing and plastering or pouring, the performance index is detected after standard maintenance for 28 days,dry density 905kg/m32.3MPa of bonding strength, 32.8MPa of compressive strength and 0.951W/(m) of thermal conductivity coefficient2·K)。
Comparative example 1
The specific formula is as follows: 25 parts by mass of cement, 5 parts by mass of fly ash, 70 parts by mass of gypsum whiskers with quartz sand material amount of 0.5%, water reducing agent with material amount of 0.2%, biogel with material amount of 0.002%, defoaming agent with material amount of 0.05%, expanding agent with material amount of 0.03% and water with material amount of 0.25 times.
Respectively measuring cement, fly ash, quartz sand, a water reducing agent, biological glue, a defoaming agent, gypsum whiskers, an expanding agent and the like; placing the ingredients into a stirrer, and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; the obtained material is added with water twice and stirred evenly, two thirds of the water is added for the first time, and the rest water is added for the second time. Stirring for not less than 7 minutes to obtain the cement-based inorganic light heat-insulating material; performing pressure plastering or pouring on the obtained cement-based inorganic lightweight heat-insulating material for construction, performing standard maintenance for 28 days to detect performance indexes, and detecting the dry density of 1785kg/m32.2MPa of bonding strength, 37.5MPa of compressive strength and 1.305W/(m) of thermal conductivity coefficient2·K)。
Comparative example 2
The specific formula is as follows: 25 parts by mass of cement, 5 parts by mass of fly ash, 15 parts by mass of quartz sand, 55 parts by mass of cloud concrete stone, a water reducing agent with the material amount of 0.2%, biological glue with the material amount of 0.002%, a defoaming agent with the material amount of 0.05%, an expanding agent with the material amount of 0.03% and water with the material amount of 0.25 times.
Respectively measuring cement, fly ash, cloud concrete stone, quartz sand, a water reducing agent, biological glue, a defoaming agent, an expanding agent and the like; placing the ingredients into a stirrer, and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; the obtained material is added with water twice and stirred evenly, two thirds of the water is added for the first time, and the rest water is added for the second time. Stirring for not less than 7 minutes to obtain the cement-based inorganic light heat-insulating material; the obtained cement-based inorganic light heat-insulating material is addedPerforming construction by line pressing and smearing or pouring, performing standard maintenance for 28 days, detecting performance index, and obtaining dry density of 932kg/m3The bonding strength is 1.6MPa, the compressive strength is 28.5MPa, and the thermal conductivity is 0.986W/(m)2·K)。
Claims (6)
1. A high-strength anti-cracking cement-based inorganic light thermal insulation material is characterized in that: the composite material comprises the following components in parts by weight:
2. the material of claim 1, wherein: the particle size of the quartz sand is 1-2 mm.
3. The material of claim 1, wherein: the particle size of the cloud concrete stone is 3-4 mm.
4. The material of claim 1, wherein: the water reducing agent is a polycarboxylic acid high-efficiency water reducing agent.
5. The material of claim 1, wherein: the expanding agent is a plastic expanding agent.
6. A method for preparing the high-strength anti-cracking cement-based inorganic lightweight thermal insulation material as claimed in claim 1, which comprises the following steps:
placing all the ingredients into a stirrer and stirring to obtain dry powder materials, wherein the stirring time is not less than 3 minutes; adding water twice and uniformly stirring, wherein two thirds of the water is added for the first time, and the rest water is added for the second time; the stirring time is not less than 7 minutes, and the cement-based inorganic light heat-insulating material is obtained.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376582A (en) * | 2008-07-07 | 2009-03-04 | 湖南江盛新型建筑材料有限公司 | Heat insulation wall integral pouring material and construction method |
| CN108929083A (en) * | 2018-07-06 | 2018-12-04 | 东南大学 | Low thermal conductivity cracking resistance light cement base building thermal insulation material and preparation method thereof |
| WO2019080527A1 (en) * | 2017-10-23 | 2019-05-02 | 北新集团建材股份有限公司 | Gypsum-based mechanical spraying plastering mortar, preparation method therefor, and gypsum-based mechanical spraying slurry |
| CN112321229A (en) * | 2020-10-30 | 2021-02-05 | 上海二十冶建设有限公司 | Sleeve grouting material for prefabricated house and preparation method thereof |
| CN112341124A (en) * | 2020-10-19 | 2021-02-09 | 同济大学 | Light grouting material for repairing hollowing of wall heat insulation system and preparation method thereof |
| CN113651574A (en) * | 2021-08-13 | 2021-11-16 | 上海二十冶建设有限公司 | Counterweight cement-based composite material and preparation method thereof |
| CN113773011A (en) * | 2021-08-13 | 2021-12-10 | 上海二十冶建设有限公司 | Hydrophobic fiber reinforced cement-based composite material and preparation method thereof |
-
2021
- 2021-12-16 CN CN202111543932.7A patent/CN114409326B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376582A (en) * | 2008-07-07 | 2009-03-04 | 湖南江盛新型建筑材料有限公司 | Heat insulation wall integral pouring material and construction method |
| WO2019080527A1 (en) * | 2017-10-23 | 2019-05-02 | 北新集团建材股份有限公司 | Gypsum-based mechanical spraying plastering mortar, preparation method therefor, and gypsum-based mechanical spraying slurry |
| CN108929083A (en) * | 2018-07-06 | 2018-12-04 | 东南大学 | Low thermal conductivity cracking resistance light cement base building thermal insulation material and preparation method thereof |
| CN112341124A (en) * | 2020-10-19 | 2021-02-09 | 同济大学 | Light grouting material for repairing hollowing of wall heat insulation system and preparation method thereof |
| CN112321229A (en) * | 2020-10-30 | 2021-02-05 | 上海二十冶建设有限公司 | Sleeve grouting material for prefabricated house and preparation method thereof |
| CN113651574A (en) * | 2021-08-13 | 2021-11-16 | 上海二十冶建设有限公司 | Counterweight cement-based composite material and preparation method thereof |
| CN113773011A (en) * | 2021-08-13 | 2021-12-10 | 上海二十冶建设有限公司 | Hydrophobic fiber reinforced cement-based composite material and preparation method thereof |
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