CN114230261A - Method for manufacturing recycled concrete - Google Patents
Method for manufacturing recycled concrete Download PDFInfo
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- CN114230261A CN114230261A CN202111587215.4A CN202111587215A CN114230261A CN 114230261 A CN114230261 A CN 114230261A CN 202111587215 A CN202111587215 A CN 202111587215A CN 114230261 A CN114230261 A CN 114230261A
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- Prior art keywords
- recycled concrete
- clay brick
- brick powder
- particles
- sand
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Classifications
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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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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 belongs to the technical field of recycled concrete, and particularly relates to a manufacturing method of recycled concrete. Uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete; wherein, 100 parts of cement; 140 portions and 220 portions of sand and clay brick powder in total; sand, clay brick powder =1: 0.8-3.5; 190 portions and 310 portions of stone and recycled concrete particles in total; and (4) carpolite, namely recycled concrete particles =1: 0.5-4.5. Compared with the prior art, the manufacturing method of the recycled concrete provided by the invention is simple and convenient to operate, feasible in cost, capable of fully utilizing the existing construction waste, and the maximum proportion of the waste materials can exceed 60 percent, and the prepared recycled concrete has higher compressive strength and can meet the requirements of most engineering applications.
Description
Technical Field
The invention belongs to the technical field of recycled concrete, and particularly relates to a manufacturing method of recycled concrete.
Background
Concrete, as a basic building material, has the advantages of low cost, strong plasticity, high strength, good durability and the like, so the concrete becomes one of the most widely applied building materials in the engineering construction industry.
The primary concrete is generally made by mixing cement, sand, stone and water, and in addition, corresponding functional additives are often added in order to improve certain properties of the concrete. In concrete, sand and stone act as a framework, called aggregate; the cement and water form cement paste, and the cement paste wraps the surface of the aggregate and fills gaps of the aggregate. Before hardening, the cement slurry plays a role in lubrication, so that the mixture is endowed with certain workability, and the construction is convenient. After the cement slurry is hardened, the aggregate is cemented into a solid whole.
However, with the rapid development of urbanization, the consumption of concrete is huge, and the exploitation of raw materials not only consumes a large amount of limited resources, but also causes certain environmental pollution. Meanwhile, with the accelerated promotion of old city reconstruction in old cities, a large amount of construction waste mainly comprising clay bricks and waste concrete is continuously increased, and great pressure is brought to the disposal of the construction waste.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for manufacturing recycled concrete.
The invention provides a method for manufacturing recycled concrete, which uses waste concrete particles as stones and waste clay brick powder as sand, thereby carrying out waste utilization on waste building materials and preparing recycled concrete with engineering application value. In order to enable the recycled concrete to meet the strength requirement of the construction engineering, the technical scheme of the invention is as follows.
A manufacturing method of recycled concrete comprises the steps of uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete;
wherein, the solid raw materials are measured according to dry weight, and the dosage is as follows:
100 parts of cement;
140 portions and 220 portions of sand and clay brick powder in total; sand, clay brick powder is 1: 0.8-3.5;
190 portions and 310 portions of stone and recycled concrete particles in total; 1, stone, namely recycled concrete particles, wherein the ratio of the recycled concrete particles to the recycled concrete particles is 1: 0.5-4.5;
the amount of water is adaptively adjusted according to the actual water content of each solid raw material, so that the viscous recycled concrete can be obtained and the on-site construction specification is met.
Further, the clay brick powder needs to be pretreated with a sodium silicate solution before use.
Further, the clay brick powder is pretreated by spraying sodium silicate solution on the clay brick powder while stirring; the proportion of the clay brick powder to the sodium silicate solution is 100:1.5-3.2 by dry weight; the sodium silicate solution parameters were as follows:
the density (20 ℃) is 1.368-1.394 g/mL;
Na2the mass percentage content of O is more than or equal to 8.2 percent;
SiO2the mass percentage content of the compound is more than or equal to 26.0 percent;
the modulus is 3.10-3.40.
Further, the preparation method of the clay brick powder comprises the following steps: cleaning, crushing and screening the waste clay bricks to obtain powder with the particle size of 0.2-2.0 mm, namely the clay brick powder.
Furthermore, the particle size of the sand is within the range of 0.2-2.0 mm.
Further, the preparation method of the clay brick powder comprises the following steps: the stones are gravel particles with the particle size of 5.0-22 mm, and are made of granite and/or basalt.
Further, the preparation method of the recycled concrete particles comprises the following steps: and cleaning, crushing and screening the waste concrete to obtain particles with the particle size of 5.0-22 mm, namely the recycled concrete particles.
Further, the solid raw materials were measured in dry weight amounts as follows:
100 parts of cement;
175 parts of sand and clay brick powder in total; sand, clay brick powder 1: 1.5;
260 parts of stones and recycled concrete particles; stone-recycled concrete particles 1: 2.2.
Has the advantages that: compared with the prior art, the manufacturing method of the recycled concrete provided by the invention is simple and convenient to operate, feasible in cost, capable of fully utilizing the existing construction waste, and the maximum proportion of the waste materials can exceed 60 percent, and the prepared recycled concrete has higher compressive strength and can meet the requirements of most engineering applications.
Detailed Description
The invention is further illustrated by the following specific examples, which are illustrative and intended to illustrate the problem and explain the invention, but not limiting.
Example 1
A manufacturing method of recycled concrete comprises the steps of uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete;
wherein, the solid raw materials are measured according to dry weight, and the dosage is as follows:
100 parts of cement;
175 parts of sand and clay brick powder in total; sand, clay brick powder 1: 1.5;
260 parts of stones and recycled concrete particles; stone-recycled concrete particles 1: 2.2.
The amount of water is adaptively adjusted according to the actual water content of each solid raw material, so that the viscous recycled concrete can be obtained and the on-site construction specification is met.
In this example, the clay brick powder is pre-treated with a sodium silicate solution before use.
In this example, the clay brick powder is pretreated by spraying a sodium silicate solution to the clay brick powder while stirring; the proportion of the clay brick powder to the sodium silicate solution is 100:2.8 by dry weight; the sodium silicate solution parameters were as follows:
the density (20 ℃) is 1.368-1.394 g/mL;
Na2the mass percentage content of O is more than or equal to 8.2 percent;
SiO2the mass percentage content of the compound is more than or equal to 26.0 percent;
the modulus is 3.10-3.40.
In this example, the preparation method of the clay brick powder is as follows: cleaning, crushing and screening the waste clay bricks to obtain powder with the particle size of 0.8-2.0 mm, namely the clay brick powder.
In the embodiment, the grain size of the sand is within the range of 0.8-2.0 mm.
In this example, the preparation method of the clay brick powder is as follows: the stones are gravel particles with the particle size of 5.0-22 mm, and are made of granite and/or basalt.
In this example, the preparation method of the recycled concrete particles was as follows: and cleaning, crushing and screening the waste concrete to obtain particles with the particle size of 5.0-22 mm, namely the recycled concrete particles.
Example 2
A manufacturing method of recycled concrete comprises the steps of uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete;
wherein, the solid raw materials are measured according to dry weight, and the dosage is as follows:
100 parts of cement;
140 parts of sand and clay brick powder in total; sand, clay brick powder 1: 3.5;
190 parts of stones and recycled concrete particles in total; stone, recycled concrete particles are 1: 4.5;
the amount of water is adaptively adjusted according to the actual water content of each solid raw material, so that the viscous recycled concrete can be obtained and the on-site construction specification is met.
In this example, the clay brick powder is pre-treated with a sodium silicate solution before use.
In this example, the clay brick powder is pretreated by spraying a sodium silicate solution to the clay brick powder while stirring; the proportion of the clay brick powder to the sodium silicate solution is 100:3.2 by dry weight; the sodium silicate solution parameters were as follows:
the density (20 ℃) is 1.368-1.394 g/mL;
Na2the mass percentage content of O is more than or equal to 8.2 percent;
SiO2the mass percentage content of the compound is more than or equal to 26.0 percent;
the modulus is 3.10-3.40.
In this example, the preparation method of the clay brick powder is as follows: cleaning, crushing and screening the waste clay bricks to obtain powder with the particle size of 0.2-0.8 mm, namely the clay brick powder.
In the embodiment, the particle size of the sand is within the range of 0.2-0.8 mm.
In this example, the preparation method of the clay brick powder is as follows: the stones are gravel particles with the particle size of 5.0-22 mm, and are made of granite and/or basalt.
In this example, the preparation method of the recycled concrete particles was as follows: and cleaning, crushing and screening the waste concrete to obtain particles with the particle size of 5.0-22 mm, namely the recycled concrete particles.
Example 3
A manufacturing method of recycled concrete comprises the steps of uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete;
wherein, the solid raw materials are measured according to dry weight, and the dosage is as follows:
100 parts of cement;
220 parts of sand and clay brick powder in total; sand, clay brick powder is 1: 0.8;
the total amount of the stones and the recycled concrete particles is 310 parts; 1, stone, namely recycled concrete particles, and 0.5: 1;
the amount of water is adaptively adjusted according to the actual water content of each solid raw material, so that the viscous recycled concrete can be obtained and the on-site construction specification is met.
In this example, the clay brick powder is pre-treated with a sodium silicate solution before use.
In this example, the clay brick powder is pretreated by spraying a sodium silicate solution to the clay brick powder while stirring; the proportion of the clay brick powder to the sodium silicate solution is 100:1.5 by dry weight; the sodium silicate solution parameters were as follows:
the density (20 ℃) is 1.368-1.394 g/mL;
Na2the mass percentage content of O is more than or equal to 8.2 percent;
SiO2the mass percentage content of the compound is more than or equal to 26.0 percent;
the modulus is 3.10-3.40.
In this example, the preparation method of the clay brick powder is as follows: cleaning, crushing and screening the waste clay bricks to obtain powder with the particle size of 0.2-0.8 mm, namely the clay brick powder.
In the embodiment, the particle size of the sand is within the range of 0.2-0.8 mm.
In this example, the preparation method of the clay brick powder is as follows: the stones are gravel particles with the particle size of 5.0-22 mm, and are made of granite and/or basalt.
In this example, the preparation method of the recycled concrete particles was as follows: and cleaning, crushing and screening the waste concrete to obtain particles with the particle size of 5.0-22 mm, namely the recycled concrete particles.
Example 4
A manufacturing method of recycled concrete comprises the steps of uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete;
wherein, the solid raw materials are measured according to dry weight, and the dosage is as follows:
100 parts of cement;
195 parts of sand and clay brick powder in total; sand, clay brick powder is 1: 3.0;
290 parts of stones and recycled concrete particles in total; stone, recycled concrete particles are 1: 3.0;
the amount of water is adaptively adjusted according to the actual water content of each solid raw material, so that the viscous recycled concrete can be obtained and the on-site construction specification is met.
In this example, the clay brick powder is pre-treated with a sodium silicate solution before use.
In this example, the clay brick powder is pretreated by spraying a sodium silicate solution to the clay brick powder while stirring; the proportion of the clay brick powder to the sodium silicate solution is 100:1.5-3.2 by dry weight; the sodium silicate solution parameters were as follows:
the density (20 ℃) is 1.368-1.394 g/mL;
Na2the mass percentage content of O is more than or equal to 8.2 percent;
SiO2the mass percentage content of the compound is more than or equal to 26.0 percent;
the modulus is 3.10-3.40.
In this example, the preparation method of the clay brick powder is as follows: cleaning, crushing and screening the waste clay bricks to obtain powder with the particle size of 0.8-2.0 mm, namely the clay brick powder.
In the embodiment, the grain size of the sand is within the range of 0.8-2.0 mm.
In this example, the preparation method of the clay brick powder is as follows: the stones are gravel particles with the particle size of 5.0-22 mm, and are made of granite and/or basalt.
In this example, the preparation method of the recycled concrete particles was as follows: and cleaning, crushing and screening the waste concrete to obtain particles with the particle size of 5.0-22 mm, namely the recycled concrete particles.
The concrete prepared in each example was prepared into a plurality of concrete test pieces, and the concrete test pieces were subjected to a compression resistance test, the results of which are shown in table 1.
TABLE 1
| Sample examples | Percentage of reclaimed materials (%) | Compressive strength (MPa) |
| Example 1 | 53.0 | 59.3～61.7 |
| Example 2 | 61.5 | 55.6～58.2 |
| Example 3 | 31.4 | 59.8～62.4 |
| Example 4 | 62.2 | 55.2～57.8 |
The above embodiments are exemplary only, and are intended to illustrate the technical concept and features of the present invention so that those skilled in the art can understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. A method for manufacturing recycled concrete, characterized in that: uniformly mixing cement, sand, clay brick powder, stones, recycled concrete particles and water to obtain viscous recycled concrete;
wherein, the solid raw materials are measured according to dry weight, and the dosage is as follows:
100 parts of cement;
140 portions and 220 portions of sand and clay brick powder in total; sand, clay brick powder =1: 0.8-3.5;
190 portions and 310 portions of stone and recycled concrete particles in total; the stones are recycled concrete particles =1: 0.5-4.5;
the amount of water is adaptively adjusted according to the actual water content of each solid raw material, so that the viscous recycled concrete can be obtained and the on-site construction specification is met.
2. The method for producing recycled concrete according to claim 1, wherein: the clay brick powder needs to be pretreated with a sodium silicate solution before use.
3. The method for producing recycled concrete according to claim 2, wherein: the clay brick powder is pretreated by spraying sodium silicate solution while stirring; the proportion of the clay brick powder to the sodium silicate solution is 100:1.5-3.2 by dry weight; the sodium silicate solution parameters were as follows:
the density (20 ℃) is 1.368-1.394 g/mL;
Na2the mass percentage content of O is more than or equal to 8.2 percent;
SiO2the mass percentage content of the compound is more than or equal to 26.0 percent;
the modulus is 3.10-3.40.
4. The method for producing recycled concrete according to claim 1, wherein: the preparation method of the clay brick powder comprises the following steps: cleaning, crushing and screening the waste clay bricks to obtain powder with the particle size of 0.2-2.0 mm, namely the clay brick powder.
5. The method for producing recycled concrete according to claim 4, wherein: the particle size of the sand is within the range of 0.2-2.0 mm.
6. The method for producing recycled concrete according to claim 1, wherein: the preparation method of the clay brick powder comprises the following steps: the stones are gravel particles with the particle size of 5.0 mm-22 mm, and are made of granite and/or basalt.
7. The method for producing recycled concrete according to claim 6, wherein: the preparation method of the recycled concrete particles comprises the following steps: and cleaning, crushing and screening the waste concrete to obtain particles with the particle size of 5.0-22 mm, namely the recycled concrete particles.
8. The method for producing recycled concrete according to claim 1, wherein: the solid raw materials are measured according to dry weight and used in the following amount:
100 parts of cement;
175 parts of sand and clay brick powder in total; sand, clay brick powder =1: 1.5;
260 parts of stones and recycled concrete particles; stone-recycled concrete granules =1: 2.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587215.4A CN114230261A (en) | 2021-12-23 | 2021-12-23 | Method for manufacturing recycled concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111587215.4A CN114230261A (en) | 2021-12-23 | 2021-12-23 | Method for manufacturing recycled concrete |
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| Publication Number | Publication Date |
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| CN114230261A true CN114230261A (en) | 2022-03-25 |
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| CN202111587215.4A Withdrawn CN114230261A (en) | 2021-12-23 | 2021-12-23 | Method for manufacturing recycled concrete |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105948545A (en) * | 2016-05-26 | 2016-09-21 | 甘肃德龙生态建材有限公司 | Production technology of ecological concrete |
| CN106045412A (en) * | 2016-05-26 | 2016-10-26 | 甘肃德龙生态建材有限公司 | Ecological concrete |
| CN107021694A (en) * | 2016-02-02 | 2017-08-08 | 新疆金宇鑫新材料有限公司 | A kind of useless clay brick powder of admixture, the regeneration concrete of brick sand |
| CN108863131A (en) * | 2018-08-20 | 2018-11-23 | 沈阳建筑大学 | A kind of preparation method of the recycled aggregate hardening agent based on discarded clay brick powder |
| CN109369087A (en) * | 2018-12-20 | 2019-02-22 | 贵州安凯达实业股份有限公司 | A kind of construction refuse regenerated concrete |
| CN112876153A (en) * | 2021-04-21 | 2021-06-01 | 西安天盛混凝土有限公司 | Recycled concrete and preparation method thereof |
-
2021
- 2021-12-23 CN CN202111587215.4A patent/CN114230261A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107021694A (en) * | 2016-02-02 | 2017-08-08 | 新疆金宇鑫新材料有限公司 | A kind of useless clay brick powder of admixture, the regeneration concrete of brick sand |
| CN105948545A (en) * | 2016-05-26 | 2016-09-21 | 甘肃德龙生态建材有限公司 | Production technology of ecological concrete |
| CN106045412A (en) * | 2016-05-26 | 2016-10-26 | 甘肃德龙生态建材有限公司 | Ecological concrete |
| CN108863131A (en) * | 2018-08-20 | 2018-11-23 | 沈阳建筑大学 | A kind of preparation method of the recycled aggregate hardening agent based on discarded clay brick powder |
| CN109369087A (en) * | 2018-12-20 | 2019-02-22 | 贵州安凯达实业股份有限公司 | A kind of construction refuse regenerated concrete |
| CN112876153A (en) * | 2021-04-21 | 2021-06-01 | 西安天盛混凝土有限公司 | Recycled concrete and preparation method thereof |
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Application publication date: 20220325 |