CN111112288A - Method for recycling construction waste with high recycling rate - Google Patents

Method for recycling construction waste with high recycling rate Download PDF

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Publication number
CN111112288A
CN111112288A CN201911314932.2A CN201911314932A CN111112288A CN 111112288 A CN111112288 A CN 111112288A CN 201911314932 A CN201911314932 A CN 201911314932A CN 111112288 A CN111112288 A CN 111112288A
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CN
China
Prior art keywords
waste
concrete
recycling
sorting
masonry
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911314932.2A
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Chinese (zh)
Inventor
桑庆荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Xingfo Pipe Industry Co Ltd
Original Assignee
Nanjing Xingfo Pipe Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Xingfo Pipe Industry Co Ltd filed Critical Nanjing Xingfo Pipe Industry Co Ltd
Priority to CN201911314932.2A priority Critical patent/CN111112288A/en
Publication of CN111112288A publication Critical patent/CN111112288A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B5/00Operations not covered by a single other subclass or by a single other group in this subclass
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00Use 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
    • C04B18/04Waste materials; Refuse
    • C04B18/16Waste materials; Refuse from building or ceramic industry
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/58Construction or demolition [C&D] waste
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/78Recycling of wood or furniture waste
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention relates to the technical field of building waste recycling, and discloses a method for recycling building waste with high recycling rate, which comprises the following processing steps: step 1, sorting and classifying waste: in a construction site, the contents of various components of construction waste generated by buildings with different structural types are different, but the main components of the construction waste are consistent, and the construction waste mainly comprises scattered mortar, concrete blocks, masonry, concrete fragments with reinforcing steel bars, waste metal materials and waste wood; step 2, sorting the waste: sorting out concrete fragments with reinforcing steel bars, crushing the concrete fragments with the reinforcing steel bars by using a tamper, and taking out the reinforcing steel bars; and (4) sorting the masonry, and sorting out the complete and available masonry to leave damaged masonry. The method for recycling the construction waste with high recycling rate can solve the problems of single purpose of the construction waste and low utilization rate of the construction waste.

Description

Method for recycling construction waste with high recycling rate
Technical Field
The invention relates to the technical field of recycling of construction wastes, in particular to a method for recycling construction wastes with high recycling rate.
Background
With the acceleration of industrialization and urbanization, the construction industry is rapidly developed, and the quantity of the generated construction waste is increased. The construction waste, i.e. construction waste, refers to residue, waste soil, waste material, residual mud and other waste generated in the process of constructing, laying, dismantling and repairing various buildings, structures, pipe networks and the like by construction, construction units or individuals. The construction waste can not be naturally degraded basically, a large amount of usable land is occupied by long-term stacking, and the problem of random dumping of the construction waste sometimes occurs, so that the city environment and the ecological environment of human beings are seriously influenced. The existing method for recycling the construction waste has low utilization rate of the construction waste, has single purpose of recycling concrete, waste wood, waste steel bars and waste metal, and is easy to cause waste of the construction waste and difficult to treat.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for recycling construction waste with high recycling rate, which has the advantages of higher utilization rate of the construction waste, avoidance of waste of the construction waste, difficulty in treatment and the like, and solves the problems of single purpose of the construction waste and lower utilization rate of the construction waste.
(II) technical scheme
In order to realize the purposes of higher utilization rate of the construction waste and avoiding waste of the construction waste, the invention provides the following technical scheme: the method for recycling the construction waste with high recycling rate comprises the following processing steps:
step 1, sorting and classifying waste: in a construction site, the contents of various components of construction waste generated by buildings with different structural types are different, but the main components are consistent, and the construction waste mainly comprises scattered mortar, concrete blocks, masonry, concrete fragments with reinforcing steel bars, waste metal materials and waste wood;
step 2, sorting the waste: sorting out concrete fragments with reinforcing steel bars, crushing the concrete fragments with the reinforcing steel bars by using a tamper, and taking out the reinforcing steel bars; sorting the masonry, sorting out the complete usable masonry and leaving the damaged masonry; sorting waste metal materials, carrying out magnetic separation on the waste metal materials, scattered mortar and concrete blocks by using a magnetic separation device, and removing non-metal impurities;
step 3, screening and winnowing the waste: screening the concrete blocks and the scattered mortar after the magnetic separation by using screening equipment to separate the concrete blocks from the mortar, carrying out air separation on the mortar by using air separation equipment, and removing impurities to leave aggregate;
step 4, filling a base or filling a pit with waste: a pad foundation, wherein concrete blocks, damaged bricks and crushed concrete are poured into a crusher to obtain concrete blocks and bricks with similar sizes as raw materials of the pad foundation; and filling the pit, namely filling the concrete blocks and the masonry by utilizing a transport vehicle according to the amount of the used materials of the foundation pit.
Preferably, the aggregate in the step 3 contains a certain amount of cement mortar in the components, and the aggregate is used as a recycled aggregate after being cleaned to prepare low-grade recycled aggregate concrete for production of foundation reinforcement, road engineering cushion layers, indoor floor and floor cushion layers, non-bearing concrete hollow blocks, concrete hollow partition boards, autoclaved fly ash bricks and the like.
Preferably, the waste wood in the step 1 is processed into chips by a wood crusher to be used as a paper making raw material or fuel or used for manufacturing medium density fiberboard, besides being reused as a template and a building material.
Preferably, the scrap metal, the scrap steel bars, the steel materials and the like in the step 2 are sorted and sent to an iron and steel plant or a nonferrous metal smelting plant for recycling.
Preferably, the screening device in the step 3 is an electric vibrating screen, the electric vibrating screen contains a concrete block screen and a mortar screen, and the meshes of the concrete block screen and the mortar screen are different in size.
(III) advantageous effects
Compared with the prior art, the invention provides a quantitative feeding cement and material device capable of automatically adding water, which has the following beneficial effects:
according to the method for recycling the high-recycling-utilization-rate building wastes, the wastes are treated to separate aggregate, waste wood, waste steel bars and waste metals, and the aggregate is used for production of foundation reinforcement, road engineering cushions, indoor floor and floor cushions, non-bearing concrete hollow blocks, concrete hollow partition boards, autoclaved fly ash bricks and the like; the waste wood can be reused as a template and a building material, and can be made into chips through a wood crusher to be used as a paper making raw material or a fuel, or be used for manufacturing medium-density fiberboards; the waste metal, the waste steel bar, the steel material and the like are sorted and sent to an iron and steel plant or a colored metal smelting plant for recycling, so that various materials in the waste have wide application, the waste of the construction waste is avoided, the waste is not easy to treat, and the recycling rate of the construction waste is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for recycling the construction waste with high recycling rate comprises the following processing steps:
step 1, sorting and classifying waste: in a construction site, the contents of various components of construction waste generated by buildings with different structural types are different, but the main components are consistent, and the construction waste mainly comprises scattered mortar, concrete blocks, masonry, concrete fragments with reinforcing steel bars, waste metal materials and waste wood;
step 2, sorting the waste: sorting out concrete fragments with reinforcing steel bars, crushing the concrete fragments with the reinforcing steel bars by using a tamper, and taking out the reinforcing steel bars; sorting the masonry, sorting out the complete usable masonry and leaving the damaged masonry; sorting waste metal materials, carrying out magnetic separation on the waste metal materials, scattered mortar and concrete blocks by using a magnetic separation device, and removing non-metal impurities;
step 3, screening and winnowing the waste: screening the concrete blocks and the scattered mortar after the magnetic separation by using screening equipment to separate the concrete blocks from the mortar, carrying out air separation on the mortar by using air separation equipment, and removing impurities to leave aggregate;
step 4, filling a base or filling a pit with waste: a pad foundation, wherein concrete blocks, damaged bricks and crushed concrete are poured into a crusher to obtain concrete blocks and bricks with similar sizes as raw materials of the pad foundation; and filling the pit, namely filling the concrete blocks and the masonry by utilizing a transport vehicle according to the amount of the used materials of the foundation pit.
And 3, preparing low-grade recycled aggregate concrete by using the aggregate in the step 3 and cement mortar containing a certain amount in the aggregate components as recycled aggregate after cleaning, and producing the low-grade recycled aggregate concrete for foundation reinforcement, road engineering cushion layers, indoor floor and floor cushion layers, non-bearing concrete hollow blocks, concrete hollow partition boards, autoclaved fly ash bricks and the like.
The waste wood in step 1, in addition to being reused as a template and a building material, is made into chips by a wood crusher to be used as a paper making raw material or fuel, or used for manufacturing medium density fiberboard.
And (3) sorting the waste metal and the waste steel bars, the waste metal, the waste steel bars, the steel materials and the like in the step (2) and then sending the sorted waste metal and the waste steel bars, the steel materials and the like to an iron and steel plant or a nonferrous metal smelting plant for recycling.
And 3, the screening equipment in the step 3 is an electric vibrating screen, the electric vibrating screen contains a concrete block screen and a mortar screen, and the sizes of meshes of the concrete block screen and the mortar screen are different.
In conclusion, according to the method for recycling the high-recycling-rate building waste, aggregate, waste wood, waste steel bars and waste metal are separated from the waste through treatment, wherein the aggregate is used for producing foundation reinforcement, road engineering cushion layers, indoor floor and floor cushion layers, non-bearing concrete hollow blocks, concrete hollow partition boards, autoclaved fly ash bricks and the like; the waste wood is reused as a template and a building material, and is made into chips through a wood crusher to be used as a paper making raw material or a fuel, or used for manufacturing a medium-density fiberboard; the waste metal, the waste steel bar, the steel material and the like are sent to an iron and steel plant or a nonferrous metal smelting plant for recycling after being sorted, so that various materials in the waste have wide application, the waste and the difficult treatment of the construction waste are avoided, and the recycling rate of the construction waste is improved.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The method for recycling the construction waste with high recycling rate is characterized by comprising the following processing steps:
step 1, sorting and classifying waste: in a construction site, the contents of various components of construction waste generated by buildings with different structural types are different, but the main components of the construction waste are consistent, and the construction waste mainly comprises scattered mortar, concrete blocks, masonry, concrete fragments with reinforcing steel bars, waste metal materials and waste wood;
step 2, sorting the waste: sorting out concrete fragments with reinforcing steel bars, crushing the concrete fragments with the reinforcing steel bars by using a tamper, and taking out the reinforcing steel bars; sorting the masonry, sorting out the complete and available masonry and leaving the damaged masonry; sorting waste metal materials, carrying out magnetic separation on the waste metal materials, scattered mortar and concrete blocks by using a magnetic separation device, and removing non-metal impurities;
step 3, screening and winnowing the waste: screening the concrete blocks and the scattered mortar after the magnetic separation by using screening equipment to separate the concrete blocks from the mortar, carrying out air separation on the mortar by using air separation equipment, and removing impurities to leave aggregate;
step 4, filling a base or filling a pit with waste: a pad foundation, wherein concrete blocks, damaged masonry and crushed concrete blocks are poured into a crusher to obtain concrete blocks and masonry with almost the same size as raw materials of the pad foundation; and filling the pit, namely filling the concrete blocks and the masonry by utilizing a transport vehicle according to the amount of the used materials of the foundation pit.
2. The method for recycling construction waste with high recycling rate as claimed in claim 1, wherein: and 3, the aggregate in the step 3 contains a certain amount of cement mortar, and the cleaned aggregate is used as recycled aggregate to prepare low-grade recycled aggregate concrete for producing foundation reinforcement, road engineering cushion layers, indoor floor and floor cushion layers, non-bearing concrete hollow blocks, concrete hollow partition boards, autoclaved fly ash bricks and the like.
3. The method for recycling construction waste with high recycling rate as claimed in claim 1, wherein: the waste wood in the step 1 can be used as a paper making raw material or fuel by a wood crusher to be made into chips besides being reused as a template and a building material, or can be used for manufacturing medium-density fiberboards.
4. The method for recycling construction waste with high recycling rate as claimed in claim 1, wherein: and (3) sorting the waste metal, the waste steel bars, the steel materials and the like in the step (2) and then sending the sorted waste metal, waste steel bars, steel materials and the like to an iron and steel plant or a nonferrous metal smelting plant for recycling.
5. The method for recycling construction waste with high recycling rate as claimed in claim 1, wherein: and 3, the screening equipment in the step 3 is an electric vibrating screen, a concrete block screen and a mortar screen are contained in the electric vibrating screen, and the meshes of the concrete block screen and the mortar screen are different in size.
CN201911314932.2A 2019-12-19 2019-12-19 Method for recycling construction waste with high recycling rate Pending CN111112288A (en)

Priority Applications (1)

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CN201911314932.2A CN111112288A (en) 2019-12-19 2019-12-19 Method for recycling construction waste with high recycling rate

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111701989A (en) * 2020-07-06 2020-09-25 许广明 Building rubbish recycling distribution system
CN113172078A (en) * 2021-05-07 2021-07-27 深圳市汇利德邦环保科技有限公司 Solid construction waste resource recovery processing method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111701989A (en) * 2020-07-06 2020-09-25 许广明 Building rubbish recycling distribution system
CN113172078A (en) * 2021-05-07 2021-07-27 深圳市汇利德邦环保科技有限公司 Solid construction waste resource recovery processing method

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Application publication date: 20200508

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