CN111777386A - Light foamed heat-insulating concrete block and preparation method thereof - Google Patents
Light foamed heat-insulating concrete block and preparation method thereof Download PDFInfo
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- CN111777386A CN111777386A CN202010720329.0A CN202010720329A CN111777386A CN 111777386 A CN111777386 A CN 111777386A CN 202010720329 A CN202010720329 A CN 202010720329A CN 111777386 A CN111777386 A CN 111777386A
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- 239000004567 concrete Substances 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 35
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 30
- 238000005187 foaming Methods 0.000 claims abstract description 24
- 239000010881 fly ash Substances 0.000 claims abstract description 18
- 239000004088 foaming agent Substances 0.000 claims abstract description 17
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 15
- 239000011398 Portland cement Substances 0.000 claims abstract description 15
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 15
- 239000002956 ash Substances 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000004927 clay Substances 0.000 claims abstract description 15
- 150000002148 esters Chemical class 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 15
- 235000019795 sodium metasilicate Nutrition 0.000 claims abstract description 15
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 15
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 15
- 239000004005 microsphere Substances 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 60
- 239000002002 slurry Substances 0.000 claims description 18
- 239000011259 mixed solution Substances 0.000 claims description 17
- 241000196324 Embryophyta Species 0.000 claims description 14
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 239000010665 pine oil Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 6
- 239000011381 foam concrete Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 210000002683 foot Anatomy 0.000 description 6
- 239000004566 building material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000011325 microbead Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/50—Producing shaped prefabricated articles from the material specially adapted for producing articles of expanded material, e.g. cellular concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/38—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions wherein the mixing is effected both by the action of a fluid and by directly-acting driven mechanical means, e.g. stirring means ; Producing cellular concrete
- B28C5/381—Producing cellular concrete
- B28C5/386—Plants; Systems; Methods
- B28C5/388—Methods
-
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
The invention relates to a light foaming heat-preservation concrete block and a preparation method thereof, wherein the concrete block is prepared from the following raw materials in parts by weight: 25-35 parts of fly ash, 35-55 parts of ordinary portland cement, 3-8 parts of nano hollow microspheres, 10-20 parts of clay, 35-45 parts of plant ash, 15-25 parts of oil foot, 10-15 parts of sodium metasilicate, 3-8 parts of polyvinyl alcohol, 1-5 parts of water reducing agent sodium nitrite, 2-6 parts of ester waterproof agent and 5-10 parts of foaming agent. The concrete block prepared by the method has the advantages of relatively high early strength, continuously increased later strength, relatively low capacity, low water absorption, low brittleness, strong durability, light weight, good sound insulation, heat insulation and heat preservation performance and the like, overcomes the defects of low strength, large shrinkage rate and easy cracking of the traditional concrete block, has light weight and can reduce building load compared with the traditional product, and also has the advantages of environmental protection, economy and the like.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, relates to a heat-insulating building material, and particularly relates to a light foamed heat-insulating concrete block and a preparation method thereof.
Background
The building block is an artificial block for building, is a novel building material, is mainly an artificial block made of concrete, industrial waste (slag, fly ash and the like) or local materials, has larger overall dimension than the brick, has the advantages of simple equipment and high building speed, and meets the requirement of wall body reformation in the industrial development of buildings. The building blocks are divided into small building blocks, medium building blocks and large building blocks according to the size and the mass. The building blocks can be divided into solid blocks and hollow blocks according to the appearance shape. The hollow building block has three forms of single-row square holes, single-row round holes and multiple rows of flat holes, wherein the multiple rows of flat holes are beneficial to heat preservation. The building blocks can be divided into main building blocks and various auxiliary building blocks according to the positions and functions of the building blocks in the building block group. Common building blocks include common concrete and decorative concrete small hollow building blocks, light aggregate concrete small hollow building blocks, fly ash small hollow building blocks, steam aerated concrete building blocks, non-autoclaved aerated concrete building blocks (also called environment-friendly light concrete building blocks) and gypsum building blocks according to different materials. Blocks with high water absorption cannot be used for building parts which are soaked for a long time and are often subjected to dry-wet alternation or freeze-thaw cycles.
Along with the energy shortage and the increasing attention of the country to the energy-saving work of buildings, the improvement of the living standard of people, the enhancement of the concept of environmental protection and the improvement of safety consciousness, people have higher requirements on the fire prevention and heat preservation performance of building materials, the adoption of non-combustible heat preservation materials becomes the mainstream of building energy conservation, the foaming heat preservation concrete blocks adopt a large amount of materials such as fly ash and cement as raw materials, can be obtained from local materials, have large yield and are certainly become mainstream products of the building heat preservation blocks, the majority of the foaming heat preservation concrete blocks in the market at present take sulphoaluminate cement as the main raw material, and the products have the defects of relatively high early strength, large later strength attenuation, relatively high capacity, relatively poor heat preservation performance, relatively high water absorption rate, easy cracking of walls, high brittleness, relatively poor durability and the like. Accordingly, there is a need for an improved building block that is lightweight, not only reduces the building load, but also increases the strength, reduces the shrinkage rate, and avoids the occurrence of cracks.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, aims to provide a new product capable of replacing the products, has light weight of the building block, can reduce the building load, and particularly relates to a light foaming heat-insulating concrete building block and a preparation method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the light foaming heat-insulation concrete block is prepared from the following raw materials in parts by weight: 25-35 parts of fly ash, 35-55 parts of ordinary portland cement, 3-8 parts of nano hollow microspheres, 10-20 parts of clay, 35-45 parts of plant ash, 15-25 parts of foots, 10-15 parts of sodium metasilicate, 3-8 parts of polyvinyl alcohol, 1-5 parts of water reducing agent sodium nitrite, 2-6 parts of ester waterproof agent and 5-10 parts of pine oil foaming agent.
Further, the light foamed heat-insulating concrete block is prepared from the following raw materials in parts by weight: 30-35 parts of fly ash, 45-55 parts of ordinary portland cement, 5-8 parts of nano hollow microspheres, 15-20 parts of clay, 40-45 parts of plant ash, 20-25 parts of foots, 13-15 parts of sodium metasilicate, 5-8 parts of polyvinyl alcohol, 1-3 parts of water reducing agent sodium nitrite, 2-4 parts of ester waterproof agent and 8-10 parts of pine oil foaming agent.
The invention also provides a preparation method of the light foaming heat-insulation concrete block, which comprises the following steps:
(1) preparing a master batch, and uniformly mixing the fly ash, the ordinary portland cement and the nano hollow microspheres according to the raw material ratio for later use;
(2) preparing slurry, taking clay and plant ash according to the raw material ratio, adding a proper amount of water, heating to 75-85 ℃ in the stirring process, stirring for 5-10 minutes, adding oil residue and sodium metasilicate, stirring for 30-35 minutes, finally adding polyvinyl alcohol, stirring for 15-20 minutes, and stirring to obtain the slurry with the water content of 30-35%;
(3) adding the master batch obtained in the step (1) into the slurry obtained in the step (2), adding a water reducing agent sodium nitrite and an ester waterproof agent according to the raw material ratio, heating to 50-60 ℃ in the stirring process, stirring for 5-10 minutes to obtain a mixed solution, and controlling the water content of the mixed solution to be 25-30%;
(4) injecting the mixed solution into a special stirring integrated machine for foam concrete, mixing and stirring for 2-3 minutes, then adding a foaming agent according to the raw material proportion, and uniformly mixing and stirring to obtain a mixed material;
(5) placing the mixture into a special container for foaming and molding;
(6) demolding and protecting;
(7) cutting into the size required by the construction engineering.
Compared with the prior art, the light foamed heat-insulating concrete block and the preparation method thereof have the beneficial effects that: the product has the advantages of relatively high early strength, continuously increased later strength, relatively low capacity, low water absorption, low brittleness, strong durability, light weight, sound insulation, heat insulation, good heat preservation performance and the like, overcomes the defects of low strength, large shrinkage rate and easy cracking of the traditional concrete block, and has the advantages of light weight of the block, capability of reducing building load, environmental protection, economy and the like compared with the traditional product.
Detailed Description
In order to more fully explain the practice of the invention, the invention is further described with reference to the following specific examples. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
Example 1:
the light foaming heat-insulation concrete block is prepared from the following raw materials in parts by weight: 25 parts of fly ash, 35 parts of ordinary portland cement, 3 parts of nano hollow microspheres, 10 parts of clay, 35 parts of plant ash, 15 parts of oil foot, 10 parts of sodium metasilicate, 3 parts of polyvinyl alcohol, 1 part of water reducing agent sodium nitrite, 2 parts of ester waterproof agent and 5 parts of pine oil foaming agent.
The preparation method of the light foaming heat-insulation concrete block comprises the following steps:
(1) preparing a master batch, and uniformly mixing the fly ash, the ordinary portland cement and the nano hollow microspheres according to the raw material ratio for later use;
(2) preparing slurry, taking clay and plant ash according to the raw material ratio, adding a proper amount of water, heating to 75-80 ℃ in the stirring process, stirring for 8-10 minutes, adding oil residue and sodium metasilicate, stirring for 33-35 minutes, finally adding polyvinyl alcohol, stirring for 18-20 minutes, and stirring to obtain the slurry with the water content of 30-35%;
(3) adding the master batch obtained in the step (1) into the slurry obtained in the step (2), adding a water reducing agent sodium nitrite and an ester waterproof agent according to the raw material ratio, heating to 50-55 ℃ in the stirring process, stirring for 8-10 minutes to obtain a mixed solution, and controlling the water content of the mixed solution to be 25-30%;
(4) injecting the mixed solution into a special stirring integrated machine for foam concrete, mixing and stirring for 2-3 minutes, then adding a foaming agent according to the raw material proportion, and uniformly mixing and stirring to obtain a mixed material;
(5) placing the mixture into a special container for foaming and molding;
(6) demolding and protecting;
(7) cutting into the size required by the construction engineering.
Example 2:
the light foaming heat-insulation concrete block is prepared from the following raw materials in parts by weight: 30 parts of fly ash, 45 parts of ordinary portland cement, 5 parts of nano hollow microspheres, 15 parts of clay, 40 parts of plant ash, 20 parts of oil foot, 13 parts of sodium metasilicate, 5 parts of polyvinyl alcohol, 3 parts of water reducing agent sodium nitrite, 4 parts of ester waterproof agent and 8 parts of pine oil foaming agent.
The preparation method of the light foaming heat-insulation concrete block comprises the following steps:
(1) preparing a master batch, and uniformly mixing the fly ash, the ordinary portland cement and the nano hollow microspheres according to the raw material ratio for later use;
(2) preparing slurry, namely taking clay and plant ash according to the raw material ratio, adding a proper amount of water, heating to 78-82 ℃ in the stirring process, stirring for 7-9 minutes, adding oil residue and sodium metasilicate, stirring for 32-34 minutes, finally adding polyvinyl alcohol, stirring for 17-19 minutes, and stirring to obtain the slurry with the water content of 30-35%;
(3) adding the master batch obtained in the step (1) into the slurry obtained in the step (2), adding a water reducing agent sodium nitrite and an ester waterproof agent according to the raw material ratio, heating to 53-58 ℃ in the stirring process, stirring for 7-9 minutes to obtain a mixed solution, and controlling the water content of the mixed solution to be 25-30%;
(4) injecting the mixed solution into a special stirring integrated machine for foam concrete, mixing and stirring for 2-3 minutes, then adding a foaming agent according to the raw material proportion, and uniformly mixing and stirring to obtain a mixed material;
(5) placing the mixture into a special container for foaming and molding;
(6) demolding and protecting;
(7) cutting into the size required by the construction engineering.
Example 3:
the light foaming heat-insulation concrete block is prepared from the following raw materials in parts by weight: 32 parts of fly ash, 50 parts of ordinary portland cement, 6 parts of nano hollow micro-beads, 118 parts of clay, 42 parts of plant ash, 23 parts of oil foot, 14 parts of sodium metasilicate, 7 parts of polyvinyl alcohol, 2 parts of water reducing agent sodium nitrite, 3 parts of ester waterproofing agent and 9 parts of pine oil foaming agent.
The preparation method of the light foaming heat-insulation concrete block comprises the following steps:
(1) preparing a master batch, and uniformly mixing the fly ash, the ordinary portland cement and the nano hollow microspheres according to the raw material ratio for later use;
(2) preparing slurry, taking clay and plant ash according to the raw material ratio, adding a proper amount of water, heating to 80-82 ℃ in the stirring process, stirring for 6-8 minutes, adding oil residue and sodium metasilicate, stirring for 30-32 minutes, finally adding polyvinyl alcohol, stirring for 15-18 minutes, and stirring to obtain the slurry with the water content of 30-35%;
(3) adding the master batch obtained in the step (1) into the slurry obtained in the step (2), adding a water reducing agent sodium nitrite and an ester waterproof agent according to the raw material ratio, heating to 55-60 ℃ in the stirring process, stirring for 6-8 minutes to obtain a mixed solution, and controlling the water content of the mixed solution to be 25-30%;
(4) injecting the mixed solution into a special stirring integrated machine for foam concrete, mixing and stirring for 2-3 minutes, then adding a foaming agent according to the raw material proportion, and uniformly mixing and stirring to obtain a mixed material;
(5) placing the mixture into a special container for foaming and molding;
(6) demolding and protecting;
(7) cutting into the size required by the construction engineering.
Example 4:
the light foaming heat-insulation concrete block is prepared from the following raw materials in parts by weight: 35 parts of fly ash, 55 parts of ordinary portland cement, 8 parts of nano hollow micro-beads, 20 parts of clay, 45 parts of plant ash, 25 parts of oil foot, 15 parts of sodium metasilicate, 8 parts of polyvinyl alcohol, 5 parts of water reducing agent sodium nitrite, 6 parts of ester waterproof agent and 10 parts of pine oil foaming agent.
The preparation method of the light foaming heat-insulation concrete block comprises the following steps:
(1) preparing a master batch, and uniformly mixing the fly ash, the ordinary portland cement and the nano hollow microspheres according to the raw material ratio for later use;
(2) preparing slurry, taking clay and plant ash according to the raw material ratio, adding a proper amount of water, heating to 80-85 ℃ in the stirring process, stirring for 5-8 minutes, adding oil residue and sodium metasilicate, stirring for 30-33 minutes, finally adding polyvinyl alcohol, stirring for 15-18 minutes, and stirring to obtain the slurry with the water content of 30-35%;
(3) adding the master batch obtained in the step (1) into the slurry obtained in the step (2), adding a water reducing agent sodium nitrite and an ester waterproof agent according to the raw material ratio, heating to 55-60 ℃ in the stirring process, stirring for 5-8 minutes to obtain a mixed solution, and controlling the water content of the mixed solution to be 25-30%;
(4) injecting the mixed solution into a special stirring integrated machine for foam concrete, mixing and stirring for 2-3 minutes, then adding a foaming agent according to the raw material proportion, and uniformly mixing and stirring to obtain a mixed material;
(5) placing the mixture into a special container for foaming and molding;
(6) demolding and protecting;
(7) cutting into the size required by the construction engineering.
The concrete blocks prepared in the embodiments 1 to 4 of the invention are cut into cubes with the size of 100mm × 100mm × 100mm for performance detection, and the detection result is that the average compression strength is 5.48Mpa, and the average shrinkage value is 0.43mm/m2Mean volume weight 536kg/m3The average heat conductivity coefficient is 0.024W/(m.K), which is obviously lower than that of the traditional building block, solves the defects of low strength, large shrinkage rate and easy cracking of the traditional concrete building block, and has the advantages of light weight, reduced building load, environmental protection, economy and the like.
The above description is only an example of the present invention, and is not intended to limit the scope of the present invention, and all the insubstantial modifications made by the method, or the technical solutions of the present invention, or the direct application of the method, the technical solutions of the present invention to other fields without any modifications, are within the scope of the present invention.
Claims (4)
1. A light foaming heat preservation concrete block which is characterized in that: the concrete block is prepared from the following raw materials in parts by weight: 25-35 parts of fly ash, 35-55 parts of ordinary portland cement, 3-8 parts of nano hollow microspheres, 10-20 parts of clay, 35-45 parts of plant ash, 15-25 parts of oil foot, 10-15 parts of sodium metasilicate, 3-8 parts of polyvinyl alcohol, 1-5 parts of water reducing agent sodium nitrite, 2-6 parts of ester waterproof agent and 5-10 parts of foaming agent.
2. The lightweight foaming thermal insulation concrete block according to claim 1, characterized in that: the concrete block is prepared from the following raw materials in parts by weight: 30-35 parts of fly ash, 45-55 parts of ordinary portland cement, 5-8 parts of nano hollow microspheres, 15-20 parts of clay, 40-45 parts of plant ash, 20-25 parts of oil foot, 13-15 parts of sodium metasilicate, 5-8 parts of polyvinyl alcohol, 1-3 parts of water reducing agent sodium nitrite, 2-4 parts of ester waterproof agent and 8-10 parts of foaming agent.
3. The preparation method of the lightweight foaming thermal insulation concrete block according to claim 1 or 2, which is characterized in that: the preparation method comprises the following steps:
(1) preparing a master batch, and uniformly mixing the fly ash, the ordinary portland cement and the nano hollow microspheres according to the raw material ratio for later use;
(2) preparing slurry, taking clay and plant ash according to the raw material ratio, adding a proper amount of water, heating to 75-85 ℃ in the stirring process, stirring for 5-10 minutes, adding oil residue and sodium metasilicate, stirring for 30-35 minutes, finally adding polyvinyl alcohol, stirring for 15-20 minutes, and stirring to obtain the slurry with the water content of 30-35%;
(3) adding the master batch obtained in the step (1) into the slurry obtained in the step (2), adding a water reducing agent sodium nitrite and an ester waterproof agent according to the raw material ratio, heating to 50-60 ℃ in the stirring process, and stirring for 5-10 minutes to obtain a mixed solution;
(4) injecting the mixed solution into a special stirring integrated machine for foam concrete, mixing and stirring for 2-3 minutes, then adding a foaming agent according to the raw material proportion, and uniformly mixing and stirring to obtain a mixed material;
(5) placing the mixture into a special container for foaming and molding;
(6) demolding and protecting;
(7) cutting into the size required by the construction engineering.
4. The preparation method of the light foaming heat preservation concrete block according to claim 3 is characterized in that: the water content of the mixed liquid in the step (3) is 25-30%, and the foaming agent is a pine oil foaming agent.
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| CN202010720329.0A CN111777386A (en) | 2020-07-24 | 2020-07-24 | Light foamed heat-insulating concrete block and preparation method thereof |
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| CN108264293A (en) * | 2018-01-23 | 2018-07-10 | 合肥梵腾环保科技有限公司 | A kind of foam concrete and preparation method thereof |
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