CN112279667A - Foamed concrete block and production method thereof - Google Patents
Foamed concrete block and production method thereof Download PDFInfo
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- CN112279667A CN112279667A CN202011251327.8A CN202011251327A CN112279667A CN 112279667 A CN112279667 A CN 112279667A CN 202011251327 A CN202011251327 A CN 202011251327A CN 112279667 A CN112279667 A CN 112279667A
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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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- 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)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention belongs to the technical field of concrete production, and particularly relates to a foamed concrete block and a production method thereof, wherein the foamed concrete block comprises 25-45 parts by weight of waste stone slurry powder, 15-35 parts by weight of cement, 15-35 parts by weight of water, 1-1.5 parts by weight of a chemical foaming agent and 0.1-0.5 part by weight of an external additive, and has the advantage of low production cost; the production method of the foamed concrete block comprises the following steps: s1: preparing raw materials, wherein the raw materials comprise, by weight, 25-45 parts of waste stone slurry powder, 15-35 parts of cement, 15-35 parts of water, 1-1.5 parts of a chemical foaming agent and 0.1-0.5 part of an external additive; s2: screening stone slurry powder with qualified granularity; s3: mixing and stirring the raw materials to obtain concrete slurry; s4: pouring the concrete slurry into a mould for foaming; s5: demoulding and taking out the semi-finished concrete block, and placing the semi-finished concrete block in a curing room for curing for t 1; s6: cutting concrete blocks according to specifications; s7: the concrete blocks are placed in a curing chamber for curing time t 2. The production method has the advantages of simple process, energy conservation, environmental protection, high quality of the prepared product and the like.
Description
Technical Field
The invention belongs to the technical field of concrete production, and particularly relates to a foamed concrete block and a production method thereof.
Background
The treatment of a great deal of waste stone and stone powder generated during the construction, maintenance or demolition of building engineering has become an urgent problem, and the conventional method is to bury the waste stone or stone slurry powder, which is undoubtedly a waste of resources.
The foamed concrete block is also called foam concrete, and is a concrete product which contains a large number of holes and has certain strength and is formed by introducing gases such as air into concrete slurry in a chemical or physical mode and forming and maintaining the concrete slurry; in the production process of the foamed concrete block in the prior art, high-pressure autoclave steam curing is often needed, the stability of the concrete block formed by steam curing is poor, the process has serious energy waste and has great environmental pollution.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a foamed concrete block and a production method thereof, the foamed concrete block adopts waste mortar powder as a main raw material, and has the advantages of low production cost and resource recycling, and the production method has the advantages of simple flow, energy conservation, environmental protection, high quality of the prepared product and the like.
The invention is realized by the following technical scheme:
the foamed concrete block comprises the following raw materials in parts by weight: 25-45 parts of waste stone slurry powder, 15-35 parts of cement, 15-35 parts of water, 1-1.5 parts of chemical foaming agent and 0.1-0.5 part of external additive.
Further, the foamed concrete block comprises the following raw materials in parts by weight: 35 parts of waste stone slurry powder, 25 parts of cement, 25 parts of water, 1 part of chemical foaming agent and 0.1 part of external additive.
Further, the waste stone slurry powder is stone sawing powder.
Further, the chemical foaming agent is a hydrogen peroxide foaming agent.
Further, the external additive is one or more of a retarder, an accelerator, a foam stabilizer, a hydrophobizing agent, and oxalic acid, wherein the retarder and the accelerator cannot be used together.
Further, the composite material also comprises 5-10 parts of mineral powder slag or raw ash by weight.
The production method of the foamed concrete block comprises the following steps:
s1: preparing materials, wherein the raw materials comprise the following components in parts by weight: 25-45 parts of waste stone slurry powder, 15-35 parts of cement, 15-35 parts of water, 1-1.5 parts of chemical foaming agent and 0.1-0.5 part of external additive;
s2: screening materials, namely filtering the waste stone slurry powder to screen out stone slurry powder with qualified granularity, and crushing and filtering the waste stone slurry powder with unqualified granularity;
s3: mixing and stirring, namely mixing the raw materials, adding the mixture into a stirrer, and uniformly stirring to obtain concrete slurry;
s4: foaming, namely pouring concrete slurry into a mould, and foaming to form a semi-finished product of the concrete block;
s5: first curing, demolding and taking out the semi-finished concrete block, placing the semi-finished concrete block in a curing room, and curing for t1 time;
s6: cutting, namely cutting the concrete building block subjected to the first curing according to the specification;
s7: and (5) secondary curing, namely placing the cut concrete blocks in a curing room, and curing for t2 time to form the concrete block finished product.
Further, in step S2, the qualified slurry powder has a particle size of less than 200 mesh.
Further, in step S5, the temperature in the curing chamber is 70 to 80 ℃.
Further, in step S5, the curing time t1 is 8min to 15min, and the curing time t2 is 6h to 8 h.
Based on the technical scheme, the invention has the technical effects that:
firstly, the foamed concrete block disclosed by the invention adopts waste stone slurry powder generated by processing stone materials as a main raw material, realizes the recycling of resources, and has the advantages of energy conservation, environmental protection, low cost, good heat preservation effect and the like;
secondly, the production method of the foamed concrete block does not need the traditional foamed concrete block to be steamed by a high-pressure kettle, thereby greatly saving energy, and having the advantages of simple flow, energy conservation, environmental protection, high quality of the prepared product and the like;
and thirdly, the concrete block obtained by the production method of the foamed concrete block through natural curing is more stable than the concrete block obtained by traditional steam-pressing.
Fourthly, curing the foamed concrete blocks twice before and after cutting, wherein the concrete is in a non-completely hardened state during cutting, the cutting efficiency is high, and the abrasion to the saw blade is small;
the technical effect of the preferred technical scheme of the invention is as follows:
firstly, the foamed concrete block disclosed by the invention adopts hydrogen peroxide as a foaming agent, has strong oxidizing property, can generate oxygen, expands to generate independent closed bubbles, and reduces the water absorption of the concrete block, so that the freeze-thaw resistance of the concrete block is improved, and the weathering resistance and aging resistance of the product are improved;
secondly, mineral powder slag or raw ash is added into the raw materials of the foamed concrete block, so that the strength of the finished product can be enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method of producing a foamed concrete block of the embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The embodiment provides a foamed concrete block, which comprises the following raw materials in parts by weight: 25 parts of waste mortar powder, 15 parts of cement, 15 parts of water, 1 part of chemical foaming agent and 0.1 part of external additive.
In this embodiment, the waste stone slurry powder is stone sawing powder.
In this embodiment, the chemical foaming agent is a hydrogen peroxide foaming agent.
In this embodiment, the external additive is one or more of a retarder, an accelerator, a foam stabilizer, a hydrophobing agent, and oxalic acid, wherein the retarder and the accelerator cannot be used together.
The foamed concrete block of the embodiment has the following technical effects:
firstly, the foamed concrete block of the embodiment adopts waste stone slurry powder generated by stone processing as a main raw material, realizes the recycling of resources, and has the advantages of energy conservation, environmental protection, low cost, good heat preservation effect and the like;
secondly, the foamed concrete block adopts hydrogen peroxide as a foaming agent, has strong oxidizing property, can generate oxygen, expands to generate independent closed bubbles, and reduces the water absorption of the concrete block, so that the freeze-thaw resistance of the concrete block is improved, and the weathering resistance and aging resistance of the product are improved;
the production method of the foamed concrete block of the embodiment, as shown in fig. 1, includes the following steps:
s1: preparing materials, wherein the raw materials comprise the following components in parts by weight: 25 parts of waste mortar powder, 15 parts of cement, 15 parts of water, 1 part of chemical foaming agent and 0.1 part of external additive;
s2: screening materials, namely filtering the waste stone slurry powder to screen out stone slurry powder with qualified granularity, and crushing and filtering the waste stone slurry powder with unqualified granularity;
s3: mixing and stirring, namely mixing the raw materials, adding the mixture into a stirrer, and uniformly stirring to obtain concrete slurry;
s4: foaming, namely pouring concrete slurry into a mould, and foaming to form a semi-finished product of the concrete block;
s5: first curing, demolding and taking out the semi-finished concrete block, placing the semi-finished concrete block in a curing room, and curing for t1 time;
s6: cutting, namely cutting the concrete building block subjected to the first curing according to the specification;
s7: and (5) secondary curing, namely placing the cut concrete blocks in a curing room, and curing for t2 time to form the concrete block finished product.
In the above step S2, the qualified slurry powder has a particle size of less than 200 mesh.
In the step S5, the temperature in the curing chamber is 70 to 80 ℃ for h.
In the step S5, the curing time t1 is 8 to 15 min.
In the step S7, the curing time t2 is 6 to 8 hours.
The production method of the foamed concrete block of the embodiment has the technical effects that:
firstly, the production method of the foamed concrete block does not need the traditional foamed concrete block to be steamed and cured by a high-pressure kettle, thereby greatly saving energy, and having the advantages of simple flow, energy conservation, environmental protection, high quality of the prepared product and the like;
secondly, the concrete block obtained by the production method of the foamed concrete block through natural curing is more stable than the concrete block obtained by traditional steam-pressing.
And thirdly, the concrete slurry is foamed to form a semi-finished product of the concrete block, after the stable structure is maintained for the first time, the concrete block is cut according to the specification at the moment, the cutting efficiency is high, the abrasion to a saw blade is small, and the cut concrete block is maintained for the second time to form a completely hardened finished product.
Example 2
The embodiment provides a foamed concrete block, which comprises the following raw materials in parts by weight: 35 parts of waste stone slurry powder, 25 parts of cement, 25 parts of water, 1 part of chemical foaming agent and 0.1 part of external additive.
In the embodiment, the raw materials of the foamed concrete block further comprise 5 parts by weight of mineral powder slag or raw ash. Mineral powder slag or raw ash is added into the raw materials of the foamed concrete block, so that the strength of the finished product of the foamed concrete block can be enhanced.
In this embodiment, the waste stone slurry powder is stone sawing powder.
In this embodiment, the chemical foaming agent is a hydrogen peroxide foaming agent.
In this embodiment, the external additive is one or more of a retarder, an accelerator, a foam stabilizer, a hydrophobing agent, and oxalic acid, wherein the retarder and the accelerator cannot be used together.
The method of producing the foamed concrete block of this example was identical to the method of producing the foamed concrete block of example 1 described above.
The technical properties of the b06 and b07 grade concrete produced by the method for producing the foamed concrete block of the present example are shown in the following table:
example 3
The embodiment provides a foamed concrete block, which comprises the following raw materials in parts by weight: 45 parts of waste stone slurry powder, 35 parts of cement, 35 parts of water, 10 parts of mineral powder slag or raw ash, 1.5 parts of chemical foaming agent and 0.5 part of external additive.
In this embodiment, the waste stone slurry powder is stone sawing powder.
In this embodiment, the chemical foaming agent is a hydrogen peroxide foaming agent.
In this embodiment, the external additive is one or more of a retarder, an accelerator, a foam stabilizer, a hydrophobing agent, and oxalic acid, wherein the retarder and the accelerator cannot be used together.
The method of producing the foamed concrete block of this example was identical to the method of producing the foamed concrete block of example 1 described above.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. The foamed concrete block is characterized by comprising the following raw materials in parts by weight: 25-45 parts of waste stone slurry powder, 15-35 parts of cement, 15-35 parts of water, 1-1.5 parts of chemical foaming agent and 0.1-0.5 part of external additive.
2. The foamed concrete block according to claim 1, characterized by comprising the following raw materials in parts by weight: 35 parts of waste stone slurry powder, 25 parts of cement, 25 parts of water, 1 part of chemical foaming agent and 0.1 part of external additive.
3. The foamed concrete block of claim 1, wherein the waste stone slurry powder is stone sawing powder.
4. The foamed concrete block of claim 1, wherein the chemical blowing agent is a hydrogen peroxide blowing agent.
5. The foamed concrete block of claim 1, wherein the external additive is one or more of a retarder, an accelerator, a foam stabilizer, a hydrophobizing agent, and oxalic acid, wherein the retarder and the accelerator cannot be used together.
6. The foamed concrete block according to any one of claims 1 to 5, further comprising 5 to 10 parts by weight of a mineral powder slag or a raw ash.
7. A method for producing a foamed concrete block according to any one of claims 1 to 6, comprising the steps of:
s1: preparing materials, wherein the raw materials comprise the following components in parts by weight: 25-45 parts of waste stone slurry powder, 15-35 parts of cement, 15-35 parts of water, 1-1.5 parts of chemical foaming agent and 0.1-0.5 part of external additive;
s2: screening materials, namely filtering the waste stone slurry powder to screen out stone slurry powder with qualified granularity, and crushing and filtering the waste stone slurry powder with unqualified granularity;
s3: mixing and stirring, namely mixing the raw materials, adding the mixture into a stirrer, and uniformly stirring to obtain concrete slurry;
s4: foaming, namely pouring concrete slurry into a mould, and foaming to form a semi-finished product of the concrete block;
s5: first curing, demolding and taking out the semi-finished concrete block, placing the semi-finished concrete block in a curing room, and curing for t1 time;
s6: cutting, namely cutting the concrete building block subjected to the first curing according to the specification;
s7: and (5) secondary curing, namely placing the cut concrete blocks in a curing room, and curing for t2 time to form the concrete block finished product.
8. The method for producing a foamed concrete block according to claim 7, wherein in step S2, the qualified mortar powder has a particle size of less than 200 mesh.
9. The method for producing a foamed concrete block according to claim 7, wherein the temperature in said curing chamber is 70 ℃ to 80 ℃ in step S5.
10. The method for producing a foamed concrete block according to claim 9, wherein the curing time t1 is 8 to 15min in step S5, and the curing time t2 is 6 to 8h in step S7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251327.8A CN112279667A (en) | 2020-11-11 | 2020-11-11 | Foamed concrete block and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011251327.8A CN112279667A (en) | 2020-11-11 | 2020-11-11 | Foamed concrete block and production method thereof |
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| CN112279667A true CN112279667A (en) | 2021-01-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57183344A (en) * | 1981-05-01 | 1982-11-11 | Asahi Chemical Ind | Manufacture of lightweight foamed concrete |
| CN104177031A (en) * | 2014-08-31 | 2014-12-03 | 李小海 | Foam concrete building blocks and production method thereof |
| CN104402504A (en) * | 2014-11-10 | 2015-03-11 | 广西华欣建材有限公司 | Production technology of environment-friendly concrete building block |
| CN104829195A (en) * | 2015-04-15 | 2015-08-12 | 临沂大学 | Prestress foam concrete preparation method |
| CN107032744A (en) * | 2017-04-28 | 2017-08-11 | 防城港市海河堤管理站 | A kind of building block and preparation method thereof |
| CN110511056A (en) * | 2019-09-05 | 2019-11-29 | 许言言 | A kind of foam concrete block and preparation method thereof |
-
2020
- 2020-11-11 CN CN202011251327.8A patent/CN112279667A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57183344A (en) * | 1981-05-01 | 1982-11-11 | Asahi Chemical Ind | Manufacture of lightweight foamed concrete |
| CN104177031A (en) * | 2014-08-31 | 2014-12-03 | 李小海 | Foam concrete building blocks and production method thereof |
| CN104402504A (en) * | 2014-11-10 | 2015-03-11 | 广西华欣建材有限公司 | Production technology of environment-friendly concrete building block |
| CN104829195A (en) * | 2015-04-15 | 2015-08-12 | 临沂大学 | Prestress foam concrete preparation method |
| CN107032744A (en) * | 2017-04-28 | 2017-08-11 | 防城港市海河堤管理站 | A kind of building block and preparation method thereof |
| CN110511056A (en) * | 2019-09-05 | 2019-11-29 | 许言言 | A kind of foam concrete block and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 胡宏峡: "石粉泡沫混凝土应用研究", 《新型建筑材料》 * |
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