CN112723794A - Lightweight concrete and preparation method of lightweight concrete external wall tile - Google Patents
Lightweight concrete and preparation method of lightweight concrete external wall tile Download PDFInfo
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- CN112723794A CN112723794A CN201911028805.6A CN201911028805A CN112723794A CN 112723794 A CN112723794 A CN 112723794A CN 201911028805 A CN201911028805 A CN 201911028805A CN 112723794 A CN112723794 A CN 112723794A
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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
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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
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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of recycled concrete, and discloses lightweight concrete and a preparation method of a lightweight concrete external wall tile. The method for preparing recycled concrete by using waste concrete comprises the following processing steps of S1 mixing, S2 preprocessing, S3 foaming, S4 forming and S5 dividing. The invention has the following advantages: the external wall brick with qualified strength is successfully manufactured by using the lightweight concrete, has the effects of low cost, heat preservation, energy conservation, pollution reduction and waste reduction compared with the common concrete, and is suitable for popularization and application.
Description
Technical Field
The invention belongs to the technical field of recycled concrete, and particularly relates to lightweight concrete and a preparation method of a lightweight concrete external wall tile.
Background
The recycled concrete is concrete prepared by using crushed waste concrete as aggregate. The research on the recycling of waste concrete begins in some developed countries in the world after world war II, and the development and research on the recycled concrete not only can fundamentally solve the problem of processing the waste concrete, but also can save natural aggregate resources, thereby bringing remarkable social, economic and environmental benefits.
Disclosure of Invention
The invention aims to provide lightweight concrete and a preparation method of lightweight concrete external wall tiles, which have the effects of reducing pollution and waste by utilizing waste concrete.
The technical purpose of the invention is realized by the following technical scheme: .
The preparation method of the lightweight concrete comprises the following steps of:
cement powder: 80 to 100 portions of
Fly ash: 8-10 parts of
Talc powder: 8-10 parts of
Pore size regulator: 1-3 parts of
Foam stabilizer: 0.2 to 0.5 portion
Foaming agent: 5-10 parts of
Foaming speed regulator: 0.01 to 0.02 portion
Curing speed regulator: 0.2 to 0.5 portion
Water: 75-90 parts of
Aggregate: 12 to 22 portions of
As a further improvement of the invention: the aperture regulator is one or more of calcium stearate, zinc stearate, barium stearate, sodium carboxymethyl cellulose or hydroxypropyl methyl cellulose.
As a further improvement of the invention: the foam stabilizer is one or more of polycarboxylate, calcium lignosulfonate or methylene dinaphthyl sodium sulfonate.
As a further improvement of the invention: the foaming agent is one or more of potassium chlorate, sodium hydroxide and potassium permanganate.
As a further improvement of the invention: the curing speed regulator is one or more of boric acid, urea and nitrite.
As a further improvement of the invention: the aggregate comprises light coarse aggregate and light fine aggregate, the light coarse aggregate and the light fine aggregate comprise one or more of fly ash ceramsite, spontaneous combustion coal gangue, expanded slag bead, cinder, pumice, scoria, shale ceramsite, clay ceramsite and expanded perlite, the bulk density of the light coarse aggregate is less than 1100kg/m3, the particle size is more than 4.75mm, the bulk density of the light fine aggregate is less than 1200kg/m3, and the particle size is less than 4.75 mm.
The method for manufacturing the lightweight concrete external wall tile by using the lightweight concrete as the raw material is characterized by comprising the following steps
S1, mixing: putting cement powder, fly ash, talcum powder, aggregate and 60 parts of water into a stirrer, and uniformly stirring;
s2, pretreatment: preparing a foam stabilizer and a curing speed regulator into an aqueous solution, putting the aqueous solution into a stirrer, and uniformly stirring; then modulating the foaming speed regulator into an aqueous solution, putting the aqueous solution into a stirrer, and uniformly stirring;
s3, foaming: adding the pore diameter regulator into a stirrer, quickly stirring, adding the foaming agent into the stirrer, quickly stirring, and keeping the temperature at 30-40 ℃;
s4, forming: filling the light concrete obtained in the step S3 into a larger prefabricated model, and keeping the temperature at 25-30 ℃ for shaping for 8 hours;
s5, segmentation: dividing the prefabricated model block obtained in the step S4 into standard plate bodies with certain thickness and width;
as a further improvement of the invention: the mass fraction of each solution in the S2 is as follows:
foam stabilizer aqueous solution: 10 to 25 percent
Curing speed agent aqueous solution: 10 to 25 percent
Foaming rate regulator aqueous solution: 1 to 5 percent
The invention has the beneficial effects that: the external wall brick with qualified strength is successfully manufactured by using the lightweight concrete, has the effects of low cost, heat preservation, energy conservation, pollution reduction and waste reduction compared with the common concrete, and is suitable for popularization and application.
Detailed Description
The technical solutions in the examples will be clearly and completely described below.
Example 1
S1, mixing: adding 90 parts by mass of cement powder, 9 parts by mass of fly ash, 9 parts by mass of talcum powder, 17 parts by mass of aggregate and 60 parts by mass of water into a stirrer, and uniformly stirring;
s2, pretreatment: respectively preparing 0.4 part of foam stabilizer and 0.3 part of curing speed regulator into 15% aqueous solution, putting into a stirrer, and uniformly stirring; then 0.015 part of foaming speed regulator is prepared into 3 percent aqueous solution, and the aqueous solution is put into a stirrer and stirred evenly;
s3, foaming: adding the pore diameter regulator into a stirrer, quickly stirring, adding the foaming agent into the stirrer, quickly stirring, and keeping the temperature at 37 ℃;
s4, forming: putting the light concrete obtained in the step S3 into a larger prefabricated model, and keeping the temperature at 28 ℃ for shaping for 8 hours;
s5, segmentation: dividing the prefabricated model block obtained in the step S4 into standard plate bodies with certain thickness and width;
example 2
S1, mixing: adding 100 parts by mass of cement powder, 10 parts by mass of fly ash, 10 parts by mass of talcum powder, 12 parts by mass of aggregate and 60 parts by mass of water into a stirrer, and uniformly stirring;
s2, pretreatment: respectively preparing 0.5 part of foam stabilizer and 0.2 part of curing speed regulator into 15% aqueous solution, putting into a stirrer, and uniformly stirring; then 0.02 part of foaming speed regulator is prepared into 1% aqueous solution, and the aqueous solution is put into a stirrer and stirred uniformly;
s3, foaming: adding 3 parts of aperture regulator into a stirrer, quickly stirring, then adding 5 parts of foaming agent into the stirrer, quickly stirring, and keeping the temperature at 40 ℃;
s4, forming: putting the light concrete obtained in the step S3 into a larger prefabricated model, and keeping the temperature at 25 ℃ for shaping for 8 hours;
s5, segmentation: dividing the prefabricated model block obtained in the step S4 into standard plate bodies with certain thickness and width;
example 3
S1, mixing: adding 80 parts by mass of cement powder, 8 parts by mass of fly ash, 8 parts by mass of talcum powder, 22 parts by mass of aggregate and 60 parts by mass of water into a stirrer, and uniformly stirring;
s2, pretreatment: respectively preparing 0.2 part of foam stabilizer and 0.5 part of curing speed regulator into 25% aqueous solution, putting into a stirrer, and uniformly stirring; then 0.01 part of foaming speed regulator is prepared into 4 percent aqueous solution, and the aqueous solution is put into a stirrer and stirred evenly;
s3, foaming: 1 part of the aperture regulator is put into a stirrer for rapid stirring, then 10 parts of the foaming agent is put into the stirrer for rapid stirring, and the temperature is kept at 30 ℃;
s4, forming: putting the light concrete obtained in the step S3 into a larger prefabricated model, and keeping the temperature at 30 ℃ for shaping for 8 hours;
s5, segmentation: dividing the prefabricated model block obtained in the step S4 into standard plate bodies with certain thickness and width;
comparative example 1
S1, mixing: the cement powder is 90 parts by mass, the fly ash is 9 parts by mass, the talcum powder is 9 parts by mass, the aggregate is 17 parts by mass and the water is 75 parts by mass, and the mixture is put into a stirrer and stirred uniformly.
The concrete bricks obtained in the above examples 1, 2, 3 and comparative example 1 were tested for compressive strength, modulus of elasticity under compression, and coefficient of thermal conductivity, and the results are shown in Table 1.
TABLE 1 light concrete brick Property index results table
| Modulus of elasticity/Gpa | Compressive strength/Mpa | Thermal conductivity/(W/(m.K)) | |
| Example 1 | 40.1 | 46.6 | 0.015 |
| Example 2 | 39.3 | 44.9 | 0.034 |
| Example 3 | 36.6 | 41.2 | 0.027 |
| Comparative example 1 | 42.2 | 48.7 | 1.21 |
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Claims (8)
1. A preparation method of lightweight concrete is characterized by comprising the following steps: the lightweight concrete comprises the following components in parts by weight:
cement powder: 80 to 100 portions of
Fly ash: 8-10 parts of
Talc powder: 8-10 parts of
Pore size regulator: 1-3 parts of
Foam stabilizer: 0.2 to 0.5 portion
Foaming agent: 5-10 parts of
Foaming speed regulator: 0.01 to 0.02 portion
Curing speed regulator: 0.2 to 0.5 portion
Water: 75-90 parts of
Aggregate: 12-22 parts.
2. The method for preparing lightweight concrete according to claim 1, wherein: the aperture regulator is one or more of calcium stearate, zinc stearate, barium stearate, sodium carboxymethyl cellulose or hydroxypropyl methyl cellulose.
3. The method for preparing lightweight concrete according to claim 1, wherein: the foam stabilizer is one or more of polycarboxylate, calcium lignosulfonate or methylene dinaphthyl sodium sulfonate.
4. The method for preparing lightweight concrete according to claim 1, wherein: the foaming agent is one or more of potassium chlorate, sodium hydroxide and potassium permanganate.
5. The method for preparing lightweight concrete according to claim 1, wherein: the curing speed regulator is one or more of boric acid, urea and nitrite.
6. The method for preparing lightweight concrete according to claim 1, wherein: the aggregate comprises light coarse aggregate and light fine aggregate, the light coarse aggregate and the light fine aggregate comprise one or more of fly ash ceramsite, spontaneous combustion coal gangue, expanded slag bead, cinder, pumice, scoria, shale ceramsite, clay ceramsite and expanded perlite, and the bulk density of the light coarse aggregate is less than 1100kg/m3The particle size is more than 4.75mm, and the bulk density of the light fine aggregate is less than 1200kg/m3The grain diameter is less than 4.75 mm.
7. A method for manufacturing a lightweight concrete exterior wall tile using the lightweight concrete of any one of claims 1 to 6 as a raw material, comprising the steps of
S1, mixing: putting cement powder, fly ash, talcum powder, aggregate and 60 parts of water into a stirrer, and uniformly stirring;
s2, pretreatment: preparing a foam stabilizer and a curing speed regulator into an aqueous solution, putting the aqueous solution into a stirrer, and uniformly stirring; then modulating the foaming speed regulator into an aqueous solution, putting the aqueous solution into a stirrer, and uniformly stirring;
s3, foaming: adding the pore diameter regulator into a stirrer, quickly stirring, adding the foaming agent into the stirrer, quickly stirring, and keeping the temperature at 30-40 ℃;
s4, forming: filling the light concrete obtained in the step S3 into a larger prefabricated model, and keeping the temperature at 25-30 ℃ for shaping for 8 hours;
s5, segmentation: and (6) dividing the prefabricated model block obtained in the step (S4) into standard plate bodies with certain thickness and width.
8. The method for preparing an exterior wall tile using lightweight concrete according to claim 7, wherein: the mass fraction of each solution in the S2 is as follows:
foam stabilizer aqueous solution: 10 to 25 percent
Curing speed agent aqueous solution: 10 to 25 percent
Foaming rate regulator aqueous solution: : 1 to 5 percent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911028805.6A CN112723794A (en) | 2019-10-28 | 2019-10-28 | Lightweight concrete and preparation method of lightweight concrete external wall tile |
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| CN201911028805.6A CN112723794A (en) | 2019-10-28 | 2019-10-28 | Lightweight concrete and preparation method of lightweight concrete external wall tile |
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| CN112723794A true CN112723794A (en) | 2021-04-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860818A (en) * | 2021-10-18 | 2021-12-31 | 衡阳市爱家湘能舒适环境装饰有限责任公司 | Energy-saving heat-insulating high-strength concrete and preparation method thereof |
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2019
- 2019-10-28 CN CN201911028805.6A patent/CN112723794A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113860818A (en) * | 2021-10-18 | 2021-12-31 | 衡阳市爱家湘能舒适环境装饰有限责任公司 | Energy-saving heat-insulating high-strength concrete and preparation method thereof |
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Application publication date: 20210430 |