CN115353335A - Method for preparing high-fluidity slurry based on building residue soil - Google Patents
Method for preparing high-fluidity slurry based on building residue soil Download PDFInfo
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- CN115353335A CN115353335A CN202211023683.3A CN202211023683A CN115353335A CN 115353335 A CN115353335 A CN 115353335A CN 202211023683 A CN202211023683 A CN 202211023683A CN 115353335 A CN115353335 A CN 115353335A
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- sand
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- building residue
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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
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
Abstract
A method for preparing high-fluidity slurry based on building residue soil comprises the following steps: screening the recovered building residue soil to obtain a recovered material with a required particle size; step two, carrying out washing screening treatment on the reclaimed materials by using a washing screen to obtain reclaimed sand with the particle size of 5-40mm and reclaimed sand with the particle size of 0-5mm, and collecting generated sewage; step three, carrying out sand washing treatment on the reclaimed sand with the thickness of 0-5mm, removing the cohesive soil to obtain sand aggregate with the thickness of 0-5mm, and collecting the sewage with the cohesive soil; step four, treating the sewage collected in the step two and the step three to obtain mud cakes and filter-pressing recycled water; step five, preparing the curing agent into curing slurry; and step six, adding 5-40mm of regenerated sand, 0-5mm of sand aggregate, mud cakes, solidified slurry and filter-pressing recycled water into the stirrer, uniformly stirring to obtain high-fluidity slurry with the water content of 85-90%, and recycling the waste building residue resources by limiting a recycling treatment method of the building residue, so as to effectively increase the resource utilization rate.
Description
Technical Field
The invention belongs to the field of building residue soil recovery and treatment, and particularly relates to a method for preparing high-fluidity slurry based on building residue soil.
Background
Along with the rapid increase of economy, the problems of high resource consumption, large waste, serious environmental pollution and the like are increasingly highlighted, the contradiction of insufficient resources such as land, energy, mineral products and the like is more prominent, and the environmental pressure is increasingly increased; promoting the cyclic utilization of resources becomes a priority; generally, during civil engineering, most of the generated building waste soil is usually transported to a waste soil disposal site for storage or open sea landfill, so that not only is the treatment cost high, but also the influence on soil quality, air quality and water area is serious along with long-term stacking, and potential safety hazards exist, so that the method is a relatively troublesome problem and needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for preparing high-fluidity slurry based on building residue soil.
The invention adopts the following technical scheme:
a method for preparing high-fluidity slurry based on building residue soil comprises the following steps:
detecting building residue soil, and when the building residue soil meets a recovery standard, sending the building residue soil into a vibrating screen for screening treatment to remove the building residue soil with the particle size of more than 40mm so as to obtain a recovered material with the required particle size;
step two, carrying out washing screening treatment on the reclaimed materials by using a washing screen to obtain reclaimed sand with the particle size of 5-40mm and reclaimed sand with the particle size of 0-5mm, and collecting generated sewage;
thirdly, performing sand washing treatment on the obtained reclaimed sand with the thickness of 0-5mm by using a sand washing machine, removing cohesive soil to obtain sand aggregate with the thickness of 0-5mm, and collecting sewage with the cohesive soil;
step four, treating the sewage collected in the step two and the step three by a filter pressing device to obtain mud cakes and filter pressing recovery water;
step five, mixing and stirring a curing agent and filter-pressing recycled water by a pulping device to prepare curing slurry;
and step six, according to the production requirement of the slurry, adding 5-40mm of regenerated sand, 0-5mm of sand aggregate, mud cakes, solidified slurry and filter-pressing recycled water into a stirrer according to the required weight parts, and uniformly stirring and mixing to obtain high-fluidity slurry with the water content of 85-90%.
Further, the density of the high-fluidity slurry is 1.4 +/-0.3 g/cm 3 Slump>150mm, bleeding rate<5％。
Furthermore, the solid content of the solidified slurry is 22-25%, and the curing agent is composed of cement and mineral powder according to the mass ratio of 1.
Furthermore, the pulping device comprises a pulping tank, a water storage tank connected with the pulping tank and used for storing filter-pressing recycled water, a curing agent storage tank connected with the pulping tank, a conveying pipe connected between the pulping tank and the stirring machine, a grouting pump arranged on the conveying pipe, a first water outlet pipe connected between the pulping tank and the water storage tank, and a first control valve arranged on the first water outlet pipe.
Furthermore, the pulping tank comprises two stirring paddles arranged inside the pulping tank at intervals, and each stirring paddle comprises a vertically extending stirring shaft and a plurality of stirring blades arranged on the stirring shaft at intervals.
Furthermore, the water storage tank is connected with the stirrer through a second water outlet pipe, and a control valve is arranged on the second water outlet pipe.
From the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:
by limiting the recycling treatment method of the building residue soil, the waste building residue soil resource is recycled, the resource utilization rate is effectively improved, energy is saved, emission is reduced, the waste resource is changed into valuable, sustainable development is promoted, economic benefit is improved, and carbon emission is reduced; the density of the obtained high-fluidity slurry is 1.4 +/-0.3g/cm 3 Slump>150mm, bleeding rate<5 percent, the water content is 85 to 90 percent, can be used for road backfilling and filling tunnels and places which are difficult to compact, can be self-compacted during pouring, does not need compacting treatment, and has certain strength and stable physical properties after solidification.
Drawings
FIG. 1 is a schematic flowsheet of the present invention;
in the figure, 1-a residue-soil pond, 2-a vibrating screen, 3-a water washing screen, 4-a sand washing machine, 5-a filter pressing device, 6-a pulping device, 7-5-40mm regenerated sand storage yard, 8-0-5mm sand aggregate storage yard, 9-a mud cake storage yard, 10-a stirring machine, 51-a sewage pond, 52-a filter press, 61-a pulping pond, 62-a water storage pond, 63-a curing agent storage tank, 64-a conveying pipe, 65-a grouting pump, 66-a first water outlet pipe, 67-a first control valve, 101-a second water outlet pipe and 102-a second control valve.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to fig. 1, the equipment for preparing high-fluidity slurry based on building residue soil comprises a residue soil pool 1, a vibrating screen 2, a washing screen 3, a sand washing machine 4, a filter pressing device 5, a pulping device 6, a 5-40mm reclaimed sand storage yard 7, a 0-5mm sand aggregate storage yard 8, a mud cake storage yard 9 and a stirrer 10.
The residue soil pond 1 is used for stacking the materials which accord with the recovery standard, and the recovery standard specifically comprises: firstly, the raw materials can be various urban building foundation excavation, underground engineering excavation, subway station open excavation, construction earthwork of a rotary drilling rig, shield soil and the like, and do not belong to hazardous waste specified in the national hazardous waste list; secondly, the organic content in the raw material does not exceed 8%.
The vibrating screen 2 is connected with the residue soil pool 1, and is used for screening the recovered building residue soil to remove the building residue soil with the particle size of more than 40mm so as to obtain a recovered material with the required particle size; specifically, the vibrating screen 2 is a device commonly used in the field of material screening, and the specific structure and the working principle thereof are not further described herein.
And the washing sieve 3 is connected with the vibrating sieve 2, and is used for washing and sieving the reclaimed materials to obtain reclaimed sand with the particle size of 5-40mm and reclaimed sand with the particle size of 0-5mm, specifically, the washing sieve 3 is common equipment in the field of sandy soil treatment, and the specific structure and the working principle are not further described.
A sand washer 4 connected with the washing sieve 3 for washing the obtained reclaimed sand with the thickness of 0-5mm to remove the cohesive soil so as to obtain sand aggregate with the thickness of 0-5 mm; specifically, the sand washer 4 is a device commonly used in the field of sand treatment, and the specific structure and the working principle thereof are not further described herein.
The filter pressing device 5 is used for treating sewage generated by the water washing sieve 3 and the sand washing machine 4 and comprises a sewage pool 51 and a filter press 52; and the sewage tank 51 is respectively connected with the washing screen 3 and the sand washer 4, and is used for collecting sewage in the washing screen processing and sand washing processing processes so as to be used in the subsequent processing process and reduce the waste of resources.
A filter press 52 connected to the sewage tank 51 for performing filter-pressing treatment on the recovered sewage to obtain a sludge cake and filter-pressed recovered water; specifically, the filter press 52 is a device commonly used in the field of sand treatment, and the detailed structure and working principle thereof are not further described herein.
The pulping device 6 is used for mixing and stirring curing agent and filter-pressing reclaimed water to prepare cured slurry, and comprises a pulping tank 61, a water storage tank 62 connected with the pulping tank 61 and used for storing the filter-pressing reclaimed water, a curing agent storage tank 63 connected with the pulping tank 61, a material conveying pipe 64 connected between the pulping tank 61 and the stirrer 10, a grouting pump 65 arranged on the material conveying pipe 64, a first water outlet pipe 66 connected between the pulping tank 61 and the water storage tank 62 and a first control valve 67 arranged on the first water outlet pipe 66, wherein the curing agent is prepared into the cured slurry in advance through the pulping tank 61 and then is mixed with sand so as to better measure the curing agent and ensure the quality of the prepared high-fluidity slurry; specifically, the solid content of the solidified slurry is 22-25%, and the solidifying agent is composed of cement and mineral powder according to the mass ratio of 1; further, the optimum solids content of the cured slurry was 24%.
The pulping tank 61 comprises two stirring paddles 611 arranged at intervals in the pulping tank, wherein the stirring paddles 611 comprise a vertically extending stirring shaft 612 and a plurality of stirring blades 613 arranged at intervals on the stirring shaft 612, and the stirring blades 3 can be chain stirring blades and/or sheet stirring blades according to the stirring requirements.
And the 5-40mm reclaimed sand storage yard 7 is connected with the washing sieve 3 and used for stacking 5-40mm reclaimed sand obtained by processing the washing sieve 3.
And the 0-5mm sand aggregate storage yard 8 is connected with the sand washer 4 and used for stacking 0-5mm reclaimed sand aggregates obtained by treatment of the sand washer 4.
And the mud cake storage yard 9 is connected with the filter press 52 and used for stacking filter cakes obtained by the treatment of the filter press 52.
The stirrer 10 is respectively connected with the pulping tank 61, the water storage tank 62, the 5-40mm reclaimed sand storage yard 7, the 0-5mm sand aggregate storage yard 8 and the mud cake storage yard 9, can receive reclaimed sand of 5-40mm, sand aggregate of 0-5mm, mud cakes, solidified slurry and filter-pressing reclaimed water according to the production requirement of the slurry, and then uniformly stirs and mixes to obtain high-fluidity slurry with the water content of 85-90%; specifically, the blender 10 is connected with the water storage tank 62 through a second water outlet pipe 101, and a second control valve 102 is arranged on the second water outlet pipe 101; further, the mixer 10 is a dual-shaft mixer, which is a common device in a mixing apparatus, and the detailed structure and operation principle thereof are not further described herein.
A method for preparing flowable slurry based on building residue soil adopts the equipment, and comprises the following steps:
step one, detecting building residue soil, and when the building residue soil meets the recovery standard, sending the building residue soil into a residue soil pool 1 for stacking;
step two, conveying the building residue soil recovered from the residue soil pool 1 into a vibrating screen 2 for screening treatment, and removing the building residue soil with the particle size of more than 40mm to obtain a recovered material with the required particle size;
thirdly, washing and screening the reclaimed materials by using a washing screen 3 to obtain reclaimed sand with the particle size of 5-40mm and reclaimed sand with the particle size of 0-5mm, and collecting generated sewage;
step four, carrying out sand washing treatment on the obtained reclaimed sand with the thickness of 0-5mm by using a sand washing machine 4, removing cohesive soil to obtain sand aggregate with the thickness of 0-5mm, and collecting sewage with the cohesive soil;
step five, treating the sewage collected in the step two and the step three by a filter pressing device 5 to obtain mud cakes and filter pressing recycled water;
step six, mixing and stirring a curing agent and filter-pressing recycled water by a pulping device 6 to prepare curing slurry;
step seven, according to the production requirement of the slurry, adding 5-40mm of reclaimed sand, 0-5mm of sand aggregate, mud cakes, solidified slurry and filter-pressing reclaimed water into the stirrer 10 according to the required weight parts, and uniformly stirring and mixing to obtain high-fluidity slurry with the water content of 85-90%;
step eight, detecting the obtained high-fluidity slurry, wherein when the detected high-fluidity slurry density is 1.4 +/-0.3 g/cm 3 Slump>150mm, bleeding rate<When the content of the high-fluidity slurry is 5%, pouring is carried out on the high-fluidity slurry in a pouring site through a truck transportation channel; and when the detected data of the high-fluidity slurry does not meet the standard, proportioning and stirring are carried out again.
By limiting the recycling treatment method of the building residue soil, the waste building residue soil resource is recycled, the resource utilization rate is effectively improved, energy is saved, emission is reduced, the waste resource is changed into valuable, sustainable development is promoted, economic benefit is improved, and carbon emission is reduced; the obtained high-fluidity slurry has the density of 1.4 +/-0.3 g/cm < 3 >, the slump of more than 150mm, the bleeding rate of less than 5 percent and the water content of 85-90 percent, can be used for road backfilling and filling tunnels and places which are difficult to compact, can be self-compacted during pouring, does not need to be compacted, has certain strength after solidification and has stable physical properties; wherein, through the cooperation of washing sieve 3 and sand washer 4, carry out hierarchical processing to the building dregs that the particle size is less than 40mm to obtain the reclaimed sand and the mud cake of different particle sizes, so that according to the preparation requirement of high fluidity mud, add required raw materials in proportion, improved resource utilization greatly.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.
Claims (6)
1. A method for preparing high-fluidity slurry based on building residue soil is characterized by comprising the following steps: the method comprises the following steps:
detecting building residue soil, and when the building residue soil meets a recovery standard, sending the building residue soil into a vibrating screen for screening treatment to remove the building residue soil with the particle size of more than 40mm so as to obtain a recovered material with the required particle size;
step two, carrying out washing screening treatment on the reclaimed materials by using a washing screen to obtain reclaimed sand with the particle size of 5-40mm and reclaimed sand with the particle size of 0-5mm, and collecting generated sewage;
thirdly, performing sand washing treatment on the obtained reclaimed sand with the thickness of 0-5mm by using a sand washing machine, removing the cohesive soil to obtain sand aggregate with the thickness of 0-5mm, and collecting the sewage with the cohesive soil;
step four, treating the sewage collected in the step two and the step three by a filter pressing device to obtain mud cakes and filter pressing recycled water;
step five, mixing and stirring a curing agent and filter-pressing recycled water by a pulping device to prepare curing slurry;
and step six, according to the production requirement of the slurry, adding 5-40mm of regenerated sand, 0-5mm of sand aggregate, mud cakes, solidified slurry and filter-pressing recycled water into a stirrer according to the required weight parts, and uniformly stirring and mixing to obtain the high-fluidity slurry with the water content of 85-90%.
2. The method for preparing high fluidity slurry based on construction waste soil according to claim 1, wherein: the density of the high-fluidity slurry is 1.4 +/-0.3 g/cm 3 Slump>150mm, bleeding rate<5％。
3. The method for preparing high fluidity slurry based on construction waste soil according to claim 1, wherein: the solid content of the solidified slurry is 22-25%, and the solidifying agent is composed of cement and mineral powder according to the mass ratio of 1.
4. The method for preparing high fluidity slurry based on construction waste soil according to claim 1, wherein: the pulping device comprises a pulping tank, a water storage tank connected with the pulping tank and used for storing filter-pressing recycled water, a curing agent storage tank connected with the pulping tank, a conveying pipe connected between the pulping tank and the stirring machine, a grouting pump arranged on the conveying pipe, a first water outlet pipe connected between the pulping tank and the water storage tank and a first control valve arranged on the first water outlet pipe.
5. The method for preparing high fluidity slurry based on construction waste soil according to claim 4, wherein: the pulping tank comprises two stirring paddles arranged inside the pulping tank at intervals, and each stirring paddle comprises a vertically extending stirring shaft and a plurality of stirring blades arranged on the stirring shaft at intervals.
6. The method for preparing high fluidity slurry based on construction waste soil according to claim 4, wherein: the water storage tank is connected with the stirrer through a second water outlet pipe, and a control valve is arranged on the second water outlet pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211023683.3A CN115353335A (en) | 2022-08-23 | 2022-08-23 | Method for preparing high-fluidity slurry based on building residue soil |
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| CN202211023683.3A CN115353335A (en) | 2022-08-23 | 2022-08-23 | Method for preparing high-fluidity slurry based on building residue soil |
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| CN115353335A true CN115353335A (en) | 2022-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116023109A (en) * | 2022-12-26 | 2023-04-28 | 上海申继交通科技有限公司 | Industrial production method and production equipment for fluidized soil |
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2022
- 2022-08-23 CN CN202211023683.3A patent/CN115353335A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116023109A (en) * | 2022-12-26 | 2023-04-28 | 上海申继交通科技有限公司 | Industrial production method and production equipment for fluidized soil |
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