CN110451855B - Treatment method of engineering waste soil and cement product - Google Patents
Treatment method of engineering waste soil and cement product Download PDFInfo
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- CN110451855B CN110451855B CN201910685454.XA CN201910685454A CN110451855B CN 110451855 B CN110451855 B CN 110451855B CN 201910685454 A CN201910685454 A CN 201910685454A CN 110451855 B CN110451855 B CN 110451855B
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The embodiment of the invention discloses a treatment method of engineering waste soil and a cement product, wherein the treatment method comprises the following steps: vibrating the engineering waste soil, and then carrying out mud-sand separation treatment to obtain aggregate and mud water; mixing the rest muddy water with cement and a water reducing agent according to the mass ratio of 100: 3-50: 0-3, and performing wet ball milling on the mixture for 0.2-5 hours to obtain slurry; pouring the slurry into a mould for grouting forming, demoulding and curing to obtain the cement product. The method does not need to carry out dehydration treatment on the muddy water subjected to sand-stone separation treatment and high-temperature sintering, so that not only can the treatment energy consumption be greatly reduced, but also the obtained cement product can be recycled, and the environmental hidden trouble caused by landfill disposal after the mud cake is dehydrated in the prior art is avoided. In addition, the method can realize the resource utilization of more than 95 percent of the engineering waste soil, thereby reducing the occupation of land resources.
Description
Technical Field
The embodiment of the invention relates to the technical field of engineering material treatment, in particular to a method for treating engineering waste soil and a cement product.
Background
With the increasing speed of urban construction, a great deal of engineering spoil is generated for the construction of large-scale infrastructures such as urban updating and rail transit. According to statistics, the yield of engineering spoil years in Shenzhen city in 2017 and 2020 is about 9150 ten thousand square, and huge pressure is brought to environmental protection and sustainable development of city construction. The traditional method of engineering waste soil is mainly landfill of accepting fields, which not only occupies a large amount of valuable land resources, but also is easy to cause secondary disasters due to improper disposal.
In the prior art, the engineering waste soil is recycled mainly by adopting a mud-sand separation technology, and sand aggregate in the engineering waste soil is separated to be used as a building material (the sand aggregate becomes a precious resource). The residual slurry is difficult to dispose, a filter pressing mode is generally adopted to prepare a slurry cake, water is recycled, and in practical situations, the slurry accounts for about 20-60% of the mass of the engineering waste soil, the most direct treatment method is outward landfill, but secondary disasters such as debris flow and the like are more prone to occurring due to improper landfill disposal of the slurry cake. The other recycling treatment mode of the engineering waste soil is brick making by sintering, which is the most effective comprehensive utilization method of the engineering waste soil, but the method belongs to the high-energy consumption industry due to the need of high-temperature calcination, and the technical method is difficult to popularize and use because of the national policy of 'banning sticking and restricting reality'.
Disclosure of Invention
The embodiment of the invention provides a treatment method of engineering waste soil and a cement product to solve the technical problems.
The embodiment of the invention adopts a technical scheme that: provided is a method for treating engineering waste soil, comprising the following steps:
vibrating the engineering waste soil, and then carrying out mud-sand separation treatment to obtain aggregate and mud water;
mixing the rest muddy water with cement and a water reducing agent according to the mass ratio of 100: 3-50: 0-3, and performing wet ball milling on the mixture for 0.2-5 hours to obtain slurry;
pouring the slurry into a mould for grouting forming, demoulding and curing to obtain the cement product.
Optionally, the aggregate has a particle size of greater than 0.075 mm.
Optionally, the mass ratio of the muddy water, the cement and the water reducing agent is 100: 3.5-45: 0 to 2.0.
Optionally, the time of wet ball milling is 0.5-3 h.
Optionally, the method further comprises: when the engineering waste soil is subjected to mud-sand separation, the water adding amount is controlled so that the water content of the separated mud-water is 50-70%.
Optionally, the method further comprises: and (3) naturally or/and watering and curing the cement product after demoulding for 3-28 days.
Optionally, the water reducing agent is a sodium salt.
Optionally, the water reducing agent is at least one of sodium silicate, sodium lignosulfonate, sodium polycarboxylate or sodium tripolyphosphate.
Optionally, the water reducing agent further comprises a set retarding component, and the set retarding component is at least one of sodium gluconate, sodium hexametaphosphate, sodium tripolyphosphate or white sugar.
In order to solve the technical problem, the embodiment of the invention also provides a cement product prepared by the method for treating the engineering waste soil.
The embodiment of the invention has the beneficial effects that: and (3) carrying out silt separation on the engineering waste soil to obtain aggregate and muddy water, wherein the aggregate can be recycled, mixing the separated muddy water with cement and a water reducing agent, and carrying out slip casting to obtain a cement product. The method does not need to carry out dehydration treatment on the muddy water subjected to sand-stone separation treatment and high-temperature sintering, so that not only can the treatment energy consumption be greatly reduced, but also the obtained cement product can be recycled, and the environmental hidden trouble caused by landfill disposal after the mud cake is dehydrated in the prior art is avoided. In addition, the method can realize the resource utilization of more than 95 percent of the engineering waste soil, thereby reducing the occupation of land resources.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution in the embodiments of the present invention is clearly and completely described below.
The embodiment of the application provides a method for treating engineering waste soil, which comprises the following steps:
step one, vibrating the engineering waste soil, and then carrying out mud-sand separation treatment to obtain aggregate and mud water;
the engineering waste soil is waste soil and stone resources generated in engineering construction. The engineering waste soil enters a mud-sand separation device for mud-sand separation after passing through a vibrating feeder, namely, particles with larger particle size are separated from mud and water.
Wherein, the particles with larger particle size can be used as aggregate for engineering recycling. Preferably, stone blocks with a particle size of more than 0.075mm (millimeters) can be selected as aggregate. Generally, in the building material, the aggregate larger than 4.75mm is stone, and the aggregate smaller than 4.75mm is sand, optionally, in this embodiment, stone or sand in a customized range can be selected as the aggregate, for example, stone with a particle size larger than 5mm and smaller than 6mm is selected as the aggregate, and in other embodiments, other value ranges can be selected, which are not limited herein.
Step two, mixing the residual muddy water with cement and a water reducing agent according to the mass ratio of 100: 3-50: 0-3, and performing wet ball milling on the mixture for 0.2-5 h (h) to obtain slurry;
when the waste engineering soil is used for separating mud and sand, water is added and the water adding amount is controlled so that the water content of the separated mud and water is 50-70%, and preferably, the water content of the mud and water is 55-65%. In the concrete implementation process, water is added in the mud-sand separation process, the added water amount can refer to the mass of the soil with the aggregate size smaller than that obtained after the aggregate is separated from the engineering waste soil, for example, when water is added, the added water amount is controlled to be 50-70% of the mass of the soil. Preferably, the water adding amount is controlled to be 55-65% of the soil mass.
Preferably, the mass ratio of the muddy water, the cement and the water reducing agent is 100: 3.5-45: 0 to 2.0. Wherein the water reducing agent is mainly a sodium ion additive, such as sodium salt, and specifically can be at least one of sodium silicate, sodium lignosulfonate, sodium polycarboxylate or sodium tripolyphosphate. The water reducing agent is added, so that the water reducing effect of the slurry can be adjusted, and the stability and the suspension property of the slurry can be improved.
And step three, pouring the slurry into a mold for grouting molding, demolding and curing to obtain the cement product.
Specifically, the time of the wet ball milling is 0.3-3.5 h, and preferably, the time of the wet ball milling is 0.5-3 h.
Optionally, the water reducing agent further comprises a set retarding component, wherein the set retarding component is at least one of sodium gluconate, sodium hexametaphosphate, sodium tripolyphosphate or white sugar. Wherein in the water reducing agent, the mass ratio of the retarding component to the sodium salt is 1: 1-10.
In this embodiment, the addition of the set retarding component can ensure that part of the free water in the cement slurry is mixed with CaSO before the initial setting4(calcium sulfate) reaction to CaSO4·2H2O, thereby reducing the moisture in the slurry, leading the particles to be close to each other and forming a thin wall, namely forming a cement product with the same appearance as the mould, simultaneously greatly reducing the water-cement ratio and ensuring the performance of the cement productStrength. In general, after the slurry is poured into a mold for molding and demolding, the demolded cement product can be cured for 3-28 days by natural curing or/and watering, preferably, the curing time is 3-10 days, wherein the compressive strength of the cement product finally obtained after curing for 7 days can reach 5-25 MPa.
It should be noted that the grouting molding adopts a reusable gypsum mold, pressing is not needed, and the method is simple. The wet ball milling method is a processing mode for processing raw materials in the ceramic industry, and the slip casting is a forming mode commonly used in the ceramic industry such as bathroom and household porcelain.
The method for treating the engineering waste soil comprises the steps of carrying out mud-sand separation on the engineering waste soil to obtain aggregate and muddy water, wherein the aggregate can be recycled, mixing the separated muddy water with cement and a water reducing agent, and carrying out slip casting to obtain a cement product. The method does not need to carry out dehydration treatment on the muddy water subjected to sand-stone separation treatment and high-temperature sintering, so that not only can the treatment energy consumption be greatly reduced, but also the obtained cement product can be recycled, and the environmental hidden trouble caused by landfill disposal after the mud cake is dehydrated in the prior art is avoided. In addition, the method can realize the resource utilization of more than 95 percent of the engineering waste soil, thereby reducing the occupation of land resources.
The embodiment of the application also provides a cement product, and the cement product is prepared by the treatment method of the engineering waste soil.
Example 1
Vibrating the engineering waste soil, and then carrying out mud-sand separation treatment, adding water in the separation process, and separating to obtain aggregate with the particle size of more than 0.075mm and mud water with the water content of 55%;
mixing muddy water with cement and sodium silicate in a mass ratio of 100: 3.5: 3, mixing, and carrying out wet ball milling on the mixture for 0.2 to obtain slurry;
pouring the slurry into a mould for slip casting, demoulding and naturally curing for 7 days to obtain the cement product with the compressive strength of 5 MPa.
Example 2
Vibrating the engineering waste soil, and then carrying out mud-sand separation treatment, adding water in the separation process, and separating to obtain aggregate with the particle size of more than 0.1mm and mud water with the water content of 65%;
mixing the muddy water with cement, sodium tripolyphosphate and sodium gluconate according to a mass ratio of 100: 45: 1.5: 0.5, mixing, and carrying out wet ball milling on the mixture for 5 hours to obtain slurry;
pouring the slurry into a mould for slip casting, demoulding and naturally curing for 3 days to obtain the cement product with the compressive strength of 25 MPa.
Example 3
Vibrating the engineering waste soil, and then carrying out mud-sand separation treatment, adding water in the separation process, and separating to obtain aggregate with the particle size of more than 0.2mm and mud water with the water content of 70%;
mixing muddy water and cement in a mass ratio of 100: 50, and performing wet ball milling on the mixture for 5 hours to obtain slurry;
pouring the slurry into a mould for slip casting, demoulding and natural curing for 10 days to obtain the cement product with the compressive strength of 18 MPa.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The method for treating the engineering waste soil is characterized by comprising the following steps of:
vibrating the engineering waste soil, and then carrying out mud-sand separation treatment to obtain aggregate and mud water;
mixing the rest muddy water with cement and a water reducing agent according to the mass ratio of 100: 3.5-45: 0-2, and performing wet ball milling on the mixture for 0.2-5 hours to obtain slurry;
pouring the slurry into a mould for grouting forming, demoulding and curing to obtain a cement product;
wherein the water reducing agent is at least one of sodium silicate, sodium polycarboxylate or sodium tripolyphosphate;
the water reducing agent also comprises a retarding component, wherein the retarding component is at least one of sodium gluconate, sodium hexametaphosphate, sodium tripolyphosphate or white sugar;
wherein the particle size of the aggregate is more than 0.075 mm;
further comprising: when the engineering waste soil is subjected to mud-sand separation, the water adding amount is controlled to enable the water content of the separated mud-water to be 50-70%.
2. The treatment method according to claim 1, wherein the time of wet ball milling is 0.5-3 hours.
3. The processing method of claim 1, further comprising: and (3) naturally or/and watering and curing the cement product after demoulding for 3-28 days.
4. A cementitious product produced by the method of treatment of the engineering spoil of any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910685454.XA CN110451855B (en) | 2019-07-27 | 2019-07-27 | Treatment method of engineering waste soil and cement product |
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| CN201910685454.XA CN110451855B (en) | 2019-07-27 | 2019-07-27 | Treatment method of engineering waste soil and cement product |
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| CN110451855A CN110451855A (en) | 2019-11-15 |
| CN110451855B true CN110451855B (en) | 2022-05-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100922081B1 (en) * | 2009-02-27 | 2009-10-16 | 주식회사보광화학 | Composite for soil pavement, construction method of soil pavement using the composite |
| CN101928122A (en) * | 2009-12-31 | 2010-12-29 | 中国建筑股份有限公司 | Synchronous grouting material used for tunnel and preparation method thereof |
| CN107382175A (en) * | 2017-07-31 | 2017-11-24 | 蔡小三 | A kind of soil coagulates agent, its preparation method and application admittedly |
| CN108409227A (en) * | 2018-02-02 | 2018-08-17 | 中交第二航务工程局有限公司 | Slurry, which is abandoned, using slurry shield abandons sand co-formulated Testing of Grouting Material Behind Segments method |
| CN109053056A (en) * | 2018-10-09 | 2018-12-21 | 河南能工巧匠网络科技有限公司 | A method of city-wall brick is prepared using shield waste pulp |
| CN109133839A (en) * | 2018-09-26 | 2019-01-04 | 北京市政建设集团有限责任公司 | A kind of method of shield dregs recycling and reusing |
-
2019
- 2019-07-27 CN CN201910685454.XA patent/CN110451855B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100922081B1 (en) * | 2009-02-27 | 2009-10-16 | 주식회사보광화학 | Composite for soil pavement, construction method of soil pavement using the composite |
| CN101928122A (en) * | 2009-12-31 | 2010-12-29 | 中国建筑股份有限公司 | Synchronous grouting material used for tunnel and preparation method thereof |
| CN107382175A (en) * | 2017-07-31 | 2017-11-24 | 蔡小三 | A kind of soil coagulates agent, its preparation method and application admittedly |
| CN108409227A (en) * | 2018-02-02 | 2018-08-17 | 中交第二航务工程局有限公司 | Slurry, which is abandoned, using slurry shield abandons sand co-formulated Testing of Grouting Material Behind Segments method |
| CN109133839A (en) * | 2018-09-26 | 2019-01-04 | 北京市政建设集团有限责任公司 | A kind of method of shield dregs recycling and reusing |
| CN109053056A (en) * | 2018-10-09 | 2018-12-21 | 河南能工巧匠网络科技有限公司 | A method of city-wall brick is prepared using shield waste pulp |
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