CN112723773A - Building solid waste recycled concrete admixture - Google Patents

Building solid waste recycled concrete admixture Download PDF

Info

Publication number
CN112723773A
CN112723773A CN202110022993.2A CN202110022993A CN112723773A CN 112723773 A CN112723773 A CN 112723773A CN 202110022993 A CN202110022993 A CN 202110022993A CN 112723773 A CN112723773 A CN 112723773A
Authority
CN
China
Prior art keywords
recycled
admixture
solid waste
aggregate
concrete
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
CN202110022993.2A
Other languages
Chinese (zh)
Inventor
郑加专
Original Assignee
郑加专
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 郑加专 filed Critical 郑加专
Priority to CN202110022993.2A priority Critical patent/CN112723773A/en
Publication of CN112723773A publication Critical patent/CN112723773A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • 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
    • C04B40/00Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039Premixtures of ingredients
    • 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
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • 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
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20Resistance against chemical, physical or biological attack
    • C04B2111/2015Sulfate resistance
    • 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 construction solid waste recycled concrete, in particular to a construction solid waste recycled concrete admixture, which comprises the following steps: s1, carrying out crushing pretreatment on the building solid waste; s2, sorting: magnetic separation and sundry separation; s3, crushing; s4, washing and screening: screening the metal reinforcing steel bars, the regenerated micro powder, the regenerated aggregate and the high-quality regenerated sand powder; s5, carrying out ultrafine grinding on the recycled fine aggregate or sand powder; s6, performing chemical strengthening and physical strengthening on the admixture, namely, performing crushing pretreatment, sorting, crushing, washing and screening on the concrete fragments, performing superfine grinding on the recycled fine aggregate or sand powder, and performing chemical strengthening and physical strengthening on the admixture, wherein the production mode can obtain high-quality recycled aggregate with good gradation and less impurities, and products with different grain sizes and different gradations can be obtained by adjusting a screen to meet various requirements.

Description

Building solid waste recycled concrete admixture
Technical Field
The invention relates to the technical field of construction solid waste recycled concrete, in particular to a construction solid waste recycled concrete admixture.
Background
The urban construction in China is continuously and rapidly expanded, the urban reconstruction and the rapid development of the building industry are accompanied by a great amount of building demolition garbage to trap cities and towns. It is estimated that 0.7-1.3 million tons of building demolition waste will be generated for every 1 million square meters of old building demolition. A large amount of construction waste is directly transported to suburbs of cities and towns without any treatment, is stacked in the open air, occupies land, continuously pollutes soil, water sources, riverways, vegetation and the like, and the comprehensive recycling of the construction waste plays an important role in solving the problems of enclosing difficulties and environmental pollution faced by cities and towns. At present, the research on building demolition mainly focuses on the aspects of recycled aggregate, recycled concrete and the like, and the construction waste cannot be recycled in all components. In addition, a large amount of natural resources and energy are consumed in the production process of cement products, and resources and energy can be saved by consuming a large amount of solid wastes. The construction waste has more active mineral components and has the condition of being recycled as a cement active mixed material. Research and practice prove that 30 percent of waste concrete and 10 percent of solid waste of clay bricks can reach the strength grade of P.O 42.5 d respectively, and the early strength of cement can be partially and effectively improved within 20 percent of the mixing amount of the waste concrete or within 10 percent of the mixing amount of waste clay brick powder. Through the classification and activity excitation technology of the construction waste, the construction waste has better popularization and application prospects in the cement industry as a mixed material, and therefore, the construction waste recycled concrete admixture is provided.
Disclosure of Invention
The invention aims to provide a building solid waste recycled concrete admixture to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the construction solid waste recycled concrete admixture comprises the following steps:
s1, carrying out crushing pretreatment on the building solid waste;
s2, sorting: magnetic separation and sundry separation;
s3, crushing;
s4, washing and screening: screening the metal reinforcing steel bars, the regenerated micro powder, the regenerated aggregate and the high-quality regenerated sand powder;
s5, carrying out ultrafine grinding on the recycled fine aggregate or sand powder;
s6, chemical strengthening and physical strengthening of the admixture.
Preferably, the S2 sorting: screening out waste iron materials by magnetic separation; and sorting and screening out waste wood.
Preferably, the S3 is crushed using a jaw crusher.
Preferably, the S4 sand making machine washes and sieves after making sand: the recycled micro powder is less than phi 0.15mm, the recycled aggregate is phi 4.75 mm-20 mm and is used for C25-C30 concrete, and the high-quality recycled sand powder is phi 0.15-4.75 mm and is used for common mortar or special mortar.
Preferably, the S5 recycled fine aggregate or sand powder is subjected to superfine grinding to generate recycled glue, recycled cement and recycled powder.
Preferably, the recycled aggregate is sprayed, impregnated and dried by using 6% organic silicon solution for chemical strengthening of S6, and is impregnated with organic silane once; the physical strengthening is added with polypropylene fiber according to the mixing amount of 1.2kg/m3 in the preparation process.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the recycled aggregate is improved by chemical reinforcement, and the recycled aggregate is subjected to spraying, dipping and drying treatment by using 6% organosilicon solution, so that the performance indexes such as water absorption rate, crushing index and the like are improved through tests, and can basically reach the level equivalent to that of a natural aggregate. The method is characterized in that the recycled aggregate is prepared by using a chemical soaking method, the chemical soaking method is used for preparing the recycled aggregate, the availability of the recycled aggregate can be obviously improved, the anti-carbonization performance of the concrete prepared from the chemically soaked recycled aggregate is obviously improved, the internal porosity of the recycled aggregate can be greatly reduced due to the chemical soaking, the recycled concrete is more compact, the anti-carbonization capacity is improved, and the anti-carbonization performance of the recycled aggregate after particle shaping is even higher than that of the common concrete prepared from natural aggregate after one-time organosilane soaking.
2. In the invention, the polypropylene fiber is added in the recycled aggregate according to the mixing amount of 1.2kg/m3 in the preparation process, so that the tensile strength of the obtained recycled concrete test piece can be improved by 13 percent, which shows that the tensile fiber admixture is also suitable for recycled concrete.
3. According to the invention, the concrete fragments are subjected to building solid waste crushing pretreatment, sorting, crushing, washing and screening, recycled fine aggregate or sand powder ultrafine grinding, chemical reinforcement and physical reinforcement of admixture, high-quality recycled aggregate with good gradation and less impurities can be obtained by the production mode, products with different grain sizes and different gradations can be obtained by adjusting the screen mesh so as to meet various requirements, in the production process of the recycled aggregate, the cleaning process belongs to a necessary link, and the recycled aggregate subjected to strict cleaning has detection data such as mud content and crushing index which can be close to that of natural aggregate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
The invention provides a technical scheme that:
the construction solid waste recycled concrete admixture comprises the following steps:
s1, carrying out crushing pretreatment on the building solid waste;
s2, sorting: magnetic separation and sundry separation;
s3, crushing;
s4, washing and screening: screening the metal reinforcing steel bars, the regenerated micro powder, the regenerated aggregate and the high-quality regenerated sand powder;
s5, carrying out ultrafine grinding on the recycled fine aggregate or sand powder;
s6, chemical strengthening and physical strengthening of the admixture.
The S2 sorting: screening out waste iron materials by magnetic separation; and sorting and screening out waste wood.
And S3 crushing by using a jaw crusher.
Washing and screening after sand making of the S4 sand making machine: the recycled micro powder is less than phi 0.15mm, the recycled aggregate is phi 4.75 mm-20 mm and is used for C25-C30 concrete, and the high-quality recycled sand powder is phi 0.15-4.75 mm and is used for common mortar or special mortar.
And (3) carrying out superfine grinding on the S5 recycled fine aggregate or sand powder to generate a recycled rubber material, recycled cement and recycled powder.
The S6 chemical strengthening uses 6% organosilicon solution to spray, dip and dry the recycled aggregate, and the recycled aggregate is dipped by organosilane for one time; the physical strengthening is added with polypropylene fiber according to the mixing amount of 1.2kg/m3 in the preparation process.
The recycled aggregate is improved by chemical reinforcement, the recycled aggregate is sprayed, dipped and dried by using 6 percent organosilicon solution, and performance indexes such as water absorption, crushing index and the like are improved by testing and can basically reach the level equivalent to that of natural aggregate. The method is characterized in that the recycled aggregate is prepared by using a chemical soaking method, the chemical soaking method is used for preparing the recycled aggregate, the availability of the recycled aggregate can be obviously improved, the anti-carbonization performance of the concrete prepared from the chemically soaked recycled aggregate is obviously improved, the internal porosity of the recycled aggregate can be greatly reduced due to the chemical soaking, the recycled concrete is more compact, the anti-carbonization capacity is improved, and the anti-carbonization performance of the recycled aggregate after particle shaping is even higher than that of the common concrete prepared from natural aggregate after one-time organosilane soaking.
The polypropylene fiber is added into the recycled aggregate according to the mixing amount of 1.2kg/m3 in the preparation process, so that the tensile strength of the obtained recycled concrete test piece can be improved by 13 percent, which shows that the tensile fiber admixture is also suitable for recycled concrete.
The concrete fragments are subjected to building solid waste crushing pretreatment, sorting, crushing, washing and screening, recycled fine aggregate or sand powder ultrafine grinding, chemical strengthening and physical strengthening of admixture, high-quality recycled aggregate with good gradation and less impurities can be obtained by the production method, products with different particle sizes and different gradations can be obtained by adjusting a screen mesh so as to meet various requirements, a cleaning process belongs to a necessary link in the production process of the recycled aggregate, and detection data such as mud content, crushing index and the like of the recycled aggregate subjected to strict cleaning can be close to that of natural aggregate.
Example (b): building solid waste crushing pretreatment; sorting: magnetic separation and sundry separation; screening out waste iron materials by magnetic separation; sorting sundries and screening out waste wood; crushing by using a jaw crusher; washing and screening: after screening the metal reinforcing steel bars and sand making by a sand making machine, washing and screening: the recycled micro powder is less than phi 0.15mm, the recycled aggregate is phi 4.75 mm-20 mm and is used for C25-C30 concrete, and the high-quality recycled sand powder is phi 0.15-4.75 mm and is used for common mortar or special mortar; grinding the recycled fine aggregate or sand powder into recycled rubber material, recycled cement and recycled powder; chemical strengthening and physical strengthening of the admixture, wherein the chemical strengthening is to spray, dip and dry the recycled aggregate by using 6 percent of organic silicon solution, and the recycled aggregate is dipped by organic silane for one time; the physical reinforcement is added with polypropylene fiber according to the mixing amount of 1.2kg/m3 in the preparation process, the recycled aggregate is improved by chemical reinforcement, the recycled aggregate is sprayed, dipped and dried by organosilicon solution with the concentration of 6 percent, and the performance indexes such as water absorption rate, crushing index and the like are improved by tests, and can basically reach the level equivalent to that of the natural aggregate. The concrete prepared from the recycled aggregate after chemical soaking has obviously improved carbonization resistance, the recycled concrete prepared from the recycled aggregate after chemical soaking has greatly reduced porosity inside the recycled aggregate, so that the carbonization resistance is improved, the recycled concrete after particle shaping is impregnated by organic silane once, the carbonization resistance of the prepared recycled concrete is even higher than that of the common concrete prepared from natural aggregate, polypropylene fibers are added into the recycled aggregate during the preparation process according to the dosage of 1.2kg/m3, the tensile strength of the obtained recycled concrete sample can be improved by 13 percent, and the tensile fiber admixture is also suitable for the recycled concrete, and the concrete blocks are subjected to construction solid waste crushing pretreatment, Sorting, crushing, washing and screening, superfine grinding of the recycled fine aggregate or sand powder, chemical strengthening and physical strengthening of admixture, the production mode can obtain high-quality recycled aggregate with good gradation and less impurities, by adjusting the screen, products with different grain diameters and different grades can be obtained to meet various requirements, the cleaning procedure belongs to necessary links in the production process of the recycled aggregate, the recycled aggregate is strictly cleaned, the detection data of mud content, crushing index and the like can be close to natural aggregate, and finally, the cement stone-wrapping method is adopted to prepare the recycled concrete, the recycled concrete obtained by feeding the materials according to the sequence of water, cement, stone and sand has improved compressive strength, frost resistance and sulfate corrosion resistance, and has better performance if a recycled aggregate chemical strengthening method and a secondary stirring process are adopted at the same time.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (6)

1. The building solid waste recycled concrete admixture is characterized by comprising the following steps:
s1, carrying out crushing pretreatment on the building solid waste;
s2, sorting: magnetic separation and sundry separation;
s3, crushing;
s4, washing and screening: screening the metal reinforcing steel bars, the regenerated micro powder, the regenerated aggregate and the high-quality regenerated sand powder;
s5, carrying out ultrafine grinding on the recycled fine aggregate or sand powder;
s6, chemical strengthening and physical strengthening of the admixture.
2. The admixture for construction solid waste recycled concrete as claimed in claim 1, wherein said S2 is selected from the group consisting of: screening out waste iron materials by magnetic separation; and sorting and screening out waste wood.
3. The admixture for construction solid waste recycled concrete as claimed in claim 1, wherein said S3 is crushed by jaw crusher.
4. The admixture for construction solid waste recycled concrete as claimed in claim 1, wherein said S4 sand making machine washes and sieves after making sand: the recycled micro powder is less than phi 0.15mm, the recycled aggregate is phi 4.75 mm-20 mm and is used for C25-C30 concrete, and the high-quality recycled sand powder is phi 0.15-4.75 mm and is used for common mortar or special mortar.
5. The admixture for construction solid waste recycled concrete as claimed in claim 1, wherein said S5 recycled fine aggregate or sand powder is ultra-finely ground to produce recycled rubber material, recycled cement and recycled powder.
6. The admixture for construction solid waste recycled concrete as claimed in claim 1, wherein said S6 chemical strengthening is obtained by spraying, dipping, drying the recycled aggregate with 6% organosilicon solution, and dipping with organosilane; the physical strengthening is carried out according to the proportion of 1.2kg/m in the preparation process3The polypropylene fiber is added in the blending amount of the (A).
CN202110022993.2A 2021-01-08 2021-01-08 Building solid waste recycled concrete admixture Pending CN112723773A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110022993.2A CN112723773A (en) 2021-01-08 2021-01-08 Building solid waste recycled concrete admixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110022993.2A CN112723773A (en) 2021-01-08 2021-01-08 Building solid waste recycled concrete admixture

Publications (1)

Publication Number Publication Date
CN112723773A true CN112723773A (en) 2021-04-30

Family

ID=75591289

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110022993.2A Pending CN112723773A (en) 2021-01-08 2021-01-08 Building solid waste recycled concrete admixture

Country Status (1)

Country Link
CN (1) CN112723773A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113732019A (en) * 2021-09-03 2021-12-03 中建海峡建设发展有限公司 Waste concrete crushing and grading regeneration method
CN113814258A (en) * 2021-09-15 2021-12-21 山东山铝环境新材料有限公司 Solid waste treatment device based on cement kiln coprocessing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113732019A (en) * 2021-09-03 2021-12-03 中建海峡建设发展有限公司 Waste concrete crushing and grading regeneration method
CN113814258A (en) * 2021-09-15 2021-12-21 山东山铝环境新材料有限公司 Solid waste treatment device based on cement kiln coprocessing
CN113814258B (en) * 2021-09-15 2022-07-08 山东山铝环境新材料有限公司 Solid waste treatment device based on cement kiln coprocessing

Similar Documents

Publication Publication Date Title
CN112723773A (en) Building solid waste recycled concrete admixture
CN104072058B (en) Regeneration concrete with building waste as raw material production and production method thereof
CN105948545A (en) Production technology of ecological concrete
CN1186134C (en) Method for treating inorganic solid waste and application
CN101774223B (en) Method for preparing recycled aggregate concrete from steel fiber rubber and slag
CN110054427A (en) A method of building recycled aggregate is made using discarded concrete
CN106045412B (en) A kind of eco-concrete
CN106186945A (en) A kind of regeneration concrete and preparation method thereof
CN106007556A (en) Pumpable high-strength recycled concrete and preparation technology thereof
CN105693124A (en) Preparation method and application method of fine reclaimed aggregate for concrete internal curing
CN104556905B (en) Discarded fired brick regeneration C25 concrete and preparation method thereof
CN106830777A (en) Regeneration fill concrete and its application prepared by consumer waste incineration residue
CN104072066A (en) Road paving material adopting ceramic wastes and construction wastes and preparation method thereof
CN1107558C (en) Process for treating and reclaiming construction garbage
CN109553334A (en) A kind of recycled aggregate premixing mortar and preparation method thereof
CN109678378A (en) A kind of application of building waste treatment process and gained recycled aggregate
CN109020430A (en) A kind of construction refuse regenerated mixture of two ash stability and preparation method thereof
CN108689659A (en) A kind of construction refuse regenerated mixture of cement stabilizing and preparation method thereof
CN108623247A (en) A kind of environmentally friendly seepage brick prepared by renewable material of building waste
CN111763026A (en) Preparation process of recycled concrete aggregate
CN103588440A (en) Cement and construction waste regeneration powder composite inorganic binder for road engineering
CN105985075A (en) Recycling and reusing method of cement concrete waste
CN112661457A (en) Polypropylene fiber modified rubber concrete and preparation method thereof
CN111847949A (en) Classification method for waste concrete block treatment
CN108080396A (en) A kind of primary dregs regeneration method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication