CN111439958A - Baking-free and steaming-free brick produced from construction waste and preparation method thereof - Google Patents
Baking-free and steaming-free brick produced from construction waste and preparation method thereof Download PDFInfo
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- CN111439958A CN111439958A CN201910042525.4A CN201910042525A CN111439958A CN 111439958 A CN111439958 A CN 111439958A CN 201910042525 A CN201910042525 A CN 201910042525A CN 111439958 A CN111439958 A CN 111439958A
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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
- 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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- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a building waste brick and a preparation method thereof, relates to the field of buildings, and particularly relates to a preparation method of a baking-free and steaming-free brick produced by building waste. The building garbage brick comprises the following raw materials in parts by weight: 60-70 parts of construction waste, 10-15 parts of fly ash, 10-15 parts of cement, 3-5 parts of gypsum and 15-20 parts of cross-linking sealing curing agent aqueous solution. The building garbage brick of the invention replaces the traditional clay solid brick as the masonry material, purifies the environment, saves the energy, protects the land resource, is a product with economic benefit and social benefit, thus leading the building industry to go a virtuous circle economic mode and becoming an effective way for sustainable development of the building industry.
Description
Technical Field
The invention relates to the field of construction. A baking-free and steaming-free brick produced by construction waste and a preparation method thereof.
Background
With the development of global economy and social progress, the world population is greatly exploded, natural resources are being exhausted, and the energy crisis is about to fall. The amount of garbage produced by industrial production and the amount of garbage waste produced by people in daily life is increasing. Particularly, the construction industry develops rapidly, and the generated construction waste is increased unprecedentedly, so that the resource utilization of the construction waste is an effective way for solving the problems of 'urban waste surrounding' and resource shortage. The building garbage is used for making bricks, so that the building garbage has a strong place for use.
China is a country with the largest newly-built construction amount every year in the world, the newly-built area is 20 hundred million square meters every year, 40% of cement and steel materials in the world are consumed, the construction waste amount in China only lasts for 25-30 years, and the total amount of urban waste accounts for 30% -40%. The quantity of construction waste in China per year accounts for 40% of the total quantity of urban waste, and the problem in waste management is solved. According to rough statistics of construction material loss of buildings such as a brick-concrete structure, a full cast-in-place structure and a frame structure, 500-600 tons of construction waste can be generated only in the construction process of every ten thousand square meters of buildings; and 7000-12000 tons of old buildings are produced per ten thousand square meters, and according to incomplete statistics, the old buildings are dismantled every year in urban and rural construction of China, and the quantity of construction waste is up to 2 hundred million tons. The construction waste and old buildings destroyed by China every year account for 40 percent of the total construction amount.
The construction waste mainly comprises the following components: the waste steel wire and steel wire brick comprises soil, muck, waste steel bars, waste iron wires and various waste steel fittings, metal pipeline waste, waste bamboo wood, wood chips, wood shavings, packing cases of various decorative materials, packaging bags, scattered mortar and concrete, broken bricks and concrete blocks, yellow sand, stones and rock blocks scattered in the process of transportation and the like, wherein the materials account for about 80 percent of the total amount of construction waste.
According to statistics, 500 tons to 600 tons of construction waste can be generated in the construction process of every 1 ten thousand square meters of buildings, and 7000 tons to 1.2 tons of construction waste can be generated when 1 ten thousand square meters of old buildings are dismantled. According to incomplete statistics, old buildings are dismantled every year in urban and rural construction of China, and the quantity of building waste is up to 2 hundred million tons. The quantity of the construction waste in China accounts for 30-40% of the total quantity of the urban waste. In the face of such huge construction waste, the traditional treatment mode is mostly that the construction waste is collected by a sanitation department and then is uniformly stacked in the open air or is proposed to be buried. The random dumping of the landfill construction waste not only occupies a large amount of land and pollutes urban environment, but also has different degrees of influence on surface water deep water along with volatilization, permeation and the like of pollution factors in the construction waste. Although a good phenomenon of performing secondary utilization of construction waste occurs in some places, such as filling roadbeds and foundations with construction waste, the utilization is still in an original state, and there is no essential improvement compared with a conventional treatment mode.
According to the characteristics of the current construction waste in China, the recovery utilization rate can reach more than 95%. Compared with the solid clay brick, the method for manufacturing the recycled brick by taking and utilizing the construction waste is also used for producing 1.5 hundred million standard bricks, so that the soil taking can be reduced by 24 million cubic meters, 40 million tons of the construction waste can be consumed, and the land can be saved by 340 mu. In addition, in the brick making process, 4 ten thousand tons of fly ash can be consumed, 1.5 ten thousand tons of standard coal can be saved, and 360 tons of sulfur dioxide discharged by brick firing can be reduced.
The construction waste is recycled, so that the method not only has huge environmental benefits, but also can generate huge economic benefits. According to the estimation of 50 billion tons of newly produced construction wastes in China in 2020, if the construction wastes can be converted into ecological building materials, the value of the creation can reach 1 trillion yuan. However, only 20 enterprises engaged in recycling of construction waste in China currently exist, the national recycling rate is only about 5%, the annual construction waste recycling rate of European Union countries exceeds 90%, and Korea and Japan reach more than 97%, which is really attractive. It is comforting that under the strong call of all the circles of society, the related departments of the state recently show that a series of support policies for supporting the reclamation of construction waste are going to be provided. Therefore, China will meet the world in the aspect of realizing the recycling of construction waste while having the largest construction industry in the world.
According to statistics, the industrial value of the national resource recycling industry reaches 6000 billion dollars by the beginning of the 21 st century. The resource recycling industry in the United states provides 110 million employment posts, annual sales amount reaches up to 2360 billion dollars, and salary total amount paid for employees reaches 370 billion dollars, which is equivalent to the automobile industry in the United states. The annual construction waste recycling rate of European union countries exceeds 90%, and Korea and Japan reach more than 97%. Therefore, the construction waste is an invisible gold mine.
Disclosure of Invention
The invention aims to provide a baking-free and steaming-free brick produced by using construction waste and a preparation method thereof aiming at the national conditions of China. Not only can effectively reduce the harm of the environment of the construction waste crew, but also can recycle the waste and create great economic benefit.
In order to achieve the purpose, the invention adopts the technical scheme that the baking-free and steaming-free brick produced by the construction waste and the preparation method thereof comprise the following raw materials in parts by weight: 60-70 parts of construction waste, 10-15 parts of fly ash, 10-15 parts of cement, 3-5 parts of gypsum and 15-20 parts of cross-linking sealing curing agent aqueous solution.
Further, a preparation method of the baking-free and steaming-free brick produced by the construction waste comprises the following raw materials in parts by weight: 60 parts of construction waste bricks, 10 parts of fly ash, 10 parts of cement, 5 parts of gypsum and 15 parts of cross-linking sealing curing agent aqueous solution.
Further, the preparation process of the cross-linking sealing curing agent aqueous solution comprises the following steps: at normal temperature, 20 parts of sodium silicate, 5 parts of barium chloride, 3 parts of calcium chloride, 2 parts of sodium chloride and 10 parts of magnesium chloride are dissolved in 60 parts of water to obtain the cross-linking sealing curing agent aqueous solution.
Furthermore, the raw materials of the cross-linking sealing curing agent, namely sodium silicate, barium chloride, calcium chloride, sodium chloride and magnesium chloride, are all commercially available products.
The preparation method of the baking-free and steaming-free brick produced by the construction waste comprises the following steps:
a. firstly, performing metal removal treatment on the construction waste, and filtering hard metals in raw materials;
b. and then, carrying out primary crushing on the construction waste by a hammer crusher, directly conveying the filtered and discharged powder to a raw material preparation site by a belt conveyor after screening, and carrying out secondary crushing on the coarse powder material. The components (the grain diameter is 5 mm-10 mm) of the construction waste are required to be not more than 3%, the coarse grains (the grain diameter is 3 mm-5 mm) are not more than 30%, the fine grains (the grain diameter is 0.5 mm-3 mm) are not more than 30%, the powder (the grain diameter is less than 0.5mm) is not more than 30%, if too much powder is used, the strength is influenced, and the molding is not easy; if the fine particles are too much, the water in the green brick is not easy to discharge;
c. scientifically proportioning the materials, adding the materials into a stirrer, stirring for 30 minutes, adding an aqueous solution of a cross-linking sealing curing agent, continuously stirring for 30 minutes, and then carrying out extrusion molding through a brick making machine;
d. after forming, manual or mechanical stacking is adopted, and the product can be used after 15 days of natural curing.
The invention has the following advantages:
1. a great deal of construction waste is utilized to produce bricks, which not only reduces the pollution of the construction waste to the environment, but also creates great economic benefit;
2. after the bricks are molded by using the self-developed crosslinking curing agent, the strength of the building bricks can be achieved by natural curing without high-temperature calcination and high-pressure steam curing, so that the cost and the production efficiency are effectively reduced;
3. the crosslinking curing agent releases water in the curing process, so that the brick is environment-friendly and nontoxic, and the produced brick has no harm to human beings or nature;
7. the preparation method is simple and reasonable, can ensure the product quality, is easy to operate and has low device investment.
Detailed Description
The present invention is described in further detail below with reference to specific examples.
Example 1: a baking-free and steaming-free brick produced by construction waste comprises the following raw materials in parts by weight: 60 parts of construction waste, 10 parts of fly ash, 10 parts of cement, 5 parts of gypsum and 15 parts of cross-linking sealing curing agent aqueous solution.
The preparation process of the crosslinking sealing curing agent aqueous solution comprises the following steps: at normal temperature, 20 parts of sodium silicate, 5 parts of barium chloride, 3 parts of calcium chloride, 2 parts of sodium chloride and 10 parts of magnesium chloride are dissolved in 60 parts of water, and the water solution of the cross-linking sealing curing agent is obtained after uniform stirring.
The preparation method of the baking-free and steaming-free brick produced by the construction waste comprises the following steps:
a. firstly, performing metal removal treatment on the construction waste, and filtering hard metals in raw materials;
b. and then, carrying out primary crushing on the construction waste by a hammer crusher, directly conveying the filtered and discharged powder to a raw material preparation site by a belt conveyor after screening, and carrying out secondary crushing on the coarse powder material. The components (the grain diameter is 5 mm-10 mm) of the construction waste are required to be not more than 3%, the coarse grains (the grain diameter is 3 mm-5 mm) are not more than 30%, the fine grains (the grain diameter is 0.5 mm-3 mm) are not more than 30%, the powder (the grain diameter is less than 0.5mm) is not more than 30%, if too much powder is used, the strength is influenced, and the molding is not easy; if the fine particles are too much, the water in the green brick is not easy to discharge;
c. scientifically proportioning the materials, adding the materials into a stirrer, stirring for 30 minutes, adding an aqueous solution of a cross-linking sealing curing agent, continuously stirring for 30 minutes, and then carrying out extrusion molding through a brick making machine;
d. after forming, manual or mechanical stacking is adopted, and the product can be used after 15 days of natural curing.
e. The pressure resistance is up to 15.6 MPa!
Example 2: a baking-free and steaming-free brick produced by construction waste comprises the following raw materials in parts by weight: 65 parts of construction waste, 10 parts of fly ash, 13 parts of cement, 5 parts of gypsum and 12 parts of cross-linking sealing curing agent aqueous solution.
The preparation process of the crosslinking sealing curing agent aqueous solution comprises the following steps: at normal temperature, 25 parts of sodium silicate, 4 parts of barium chloride, 3 parts of calcium chloride, 3 parts of sodium chloride and 12 parts of magnesium chloride are dissolved in 53 parts of water, and the water solution of the cross-linking sealing curing agent is obtained after uniform stirring.
The preparation method of the baking-free and steaming-free brick produced by the construction waste comprises the following steps:
a. firstly, performing metal removal treatment on the construction waste, and filtering hard metals in raw materials;
b. and then, carrying out primary crushing on the construction waste by a hammer crusher, directly conveying the filtered and discharged powder to a raw material preparation site by a belt conveyor after screening, and carrying out secondary crushing on the coarse powder material. The components (the grain diameter is 5 mm-10 mm) of the construction waste are required to be not more than 3%, the coarse grains (the grain diameter is 3 mm-5 mm) are not more than 30%, the fine grains (the grain diameter is 0.5 mm-3 mm) are not more than 30%, the powder (the grain diameter is less than 0.5mm) is not more than 30%, if too much powder is used, the strength is influenced, and the molding is not easy; if the fine particles are too much, the water in the green brick is not easy to discharge;
c. scientifically proportioning the materials, adding the materials into a stirrer, stirring for 30 minutes, adding an aqueous solution of a cross-linking sealing curing agent, continuously stirring for 30 minutes, and then carrying out extrusion molding through a brick making machine;
d. after forming, manual or mechanical stacking is adopted, and the product can be used after 15 days of natural curing.
e. The pressure resistance is 14.8 MPa!
Example 3: a baking-free and steaming-free brick produced by construction waste comprises the following raw materials in parts by weight: 60 parts of construction waste, 9 parts of fly ash, 12 parts of cement, 3 parts of gypsum and 16 parts of cross-linking sealing curing agent aqueous solution.
The preparation process of the crosslinking sealing curing agent aqueous solution comprises the following steps: at normal temperature, 23 parts of sodium silicate, 6 parts of barium chloride, 3 parts of calcium chloride, 2 parts of sodium chloride and 8 parts of magnesium chloride are dissolved in 58 parts of water, and the water solution of the cross-linking sealing curing agent is obtained after uniform stirring.
The preparation method of the baking-free and steaming-free brick produced by the construction waste comprises the following steps:
a. firstly, performing metal removal treatment on the construction waste, and filtering hard metals in raw materials;
b. and then, carrying out primary crushing on the construction waste by a hammer crusher, directly conveying the filtered and discharged powder to a raw material preparation site by a belt conveyor after screening, and carrying out secondary crushing on the coarse powder material. The components (the grain diameter is 5 mm-10 mm) of the construction waste are required to be not more than 3%, the coarse grains (the grain diameter is 3 mm-5 mm) are not more than 30%, the fine grains (the grain diameter is 0.5 mm-3 mm) are not more than 30%, the powder (the grain diameter is less than 0.5mm) is not more than 30%, if too much powder is used, the strength is influenced, and the molding is not easy; if the fine particles are too much, the water in the green brick is not easy to discharge;
c. scientifically proportioning the materials, adding the materials into a stirrer, stirring for 30 minutes, adding an aqueous solution of a cross-linking sealing curing agent, continuously stirring for 30 minutes, and then carrying out extrusion molding through a brick making machine;
d. after forming, manual or mechanical stacking is adopted, and the product can be used after 15 days of natural curing.
e. The pressure resistance of the material is tested to 17.2 MPa!
Example 4: a baking-free and steaming-free brick produced by construction waste comprises the following raw materials in parts by weight: 66 parts of construction waste, 5 parts of fly ash, 12 parts of cement, 2 parts of gypsum and 15 parts of cross-linking sealing curing agent aqueous solution.
The preparation process of the crosslinking sealing curing agent aqueous solution comprises the following steps: at normal temperature, 18 parts of sodium silicate, 5 parts of barium chloride, 4 parts of calcium chloride, 2 parts of sodium chloride and 11 parts of magnesium chloride are dissolved in 60 parts of water, and the water solution of the cross-linking sealing curing agent is obtained after uniform stirring.
The preparation method of the baking-free and steaming-free brick produced by the construction waste comprises the following steps:
a. firstly, performing metal removal treatment on the construction waste, and filtering hard metals in raw materials;
b. and then, carrying out primary crushing on the construction waste by a hammer crusher, directly conveying the filtered and discharged powder to a raw material preparation site by a belt conveyor after screening, and carrying out secondary crushing on the coarse powder material. The components (the grain diameter is 5 mm-10 mm) of the construction waste are required to be not more than 3%, the coarse grains (the grain diameter is 3 mm-5 mm) are not more than 30%, the fine grains (the grain diameter is 0.5 mm-3 mm) are not more than 30%, the powder (the grain diameter is less than 0.5mm) is not more than 30%, if too much powder is used, the strength is influenced, and the molding is not easy; if the fine particles are too much, the water in the green brick is not easy to discharge;
c. scientifically proportioning the materials, adding the materials into a stirrer, stirring for 30 minutes, adding an aqueous solution of a cross-linking sealing curing agent, continuously stirring for 30 minutes, and then carrying out extrusion molding through a brick making machine;
d. after forming, manual or mechanical stacking is adopted, and the product can be used after 15 days of natural curing.
e. The pressure resistance is up to 19.1 MPa!
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the spirit and principle of the present invention and that equivalent modifications and substitutions and the like are included in the scope of the present invention.
Claims (3)
1. The baking-free and steaming-free brick produced by the construction waste is characterized by comprising the following raw materials in parts by weight: 60-70 parts of construction waste, 10-15 parts of fly ash, 10-15 parts of cement, 3-5 parts of gypsum and 15-20 parts of cross-linking sealing curing agent aqueous solution.
2. The baking-free and steaming-free brick produced by the construction waste as claimed in claim 1, wherein the preparation process of the cross-linking sealing curing agent aqueous solution is as follows: at normal temperature, 20 plus or minus 5 parts of sodium silicate, 5 plus or minus 2 parts of barium chloride, 3 plus or minus 1 part of calcium chloride, 2 parts of sodium chloride and 10 plus or minus 3 parts of magnesium chloride are dissolved in 60 plus or minus 10 parts of water and stirred uniformly to obtain the aqueous solution of the cross-linking sealing curing agent.
3. The aqueous solution of a cross-linking sealing curing agent according to claim 2, wherein said sodium silicate, barium chloride, calcium chloride, sodium chloride, magnesium chloride are commercially available products.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800802A (en) * | 2021-10-11 | 2021-12-17 | 临沂茂源新材料科技有限公司 | Novel building material reclaimed sand and production method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113800802A (en) * | 2021-10-11 | 2021-12-17 | 临沂茂源新材料科技有限公司 | Novel building material reclaimed sand and production method thereof |
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Application publication date: 20200724 |