CN108203261A - A kind of method that discarded concrete recycles - Google Patents

A kind of method that discarded concrete recycles Download PDF

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Publication number
CN108203261A
CN108203261A CN201611184504.9A CN201611184504A CN108203261A CN 108203261 A CN108203261 A CN 108203261A CN 201611184504 A CN201611184504 A CN 201611184504A CN 108203261 A CN108203261 A CN 108203261A
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CN
China
Prior art keywords
parts
aggregate
concrete
recycled
discarded 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
CN201611184504.9A
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Chinese (zh)
Inventor
姜鹏宾
赵岩
董爱平
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Dalian University of Technology
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Dalian University of Technology
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Publication date
Application filed by Dalian University of Technology filed Critical Dalian University of Technology
Priority to CN201611184504.9A priority Critical patent/CN108203261A/en
Publication of CN108203261A publication Critical patent/CN108203261A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • C04B20/00Use 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
    • C04B20/02Treatment
    • C04B20/023Chemical treatment
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a kind of methods that discarded concrete recycles, and this method comprises the following steps:(1) screening obtains the Aggregate of recycled concrete that grain size is 11 15mm after discarded concrete is crushed, and is sprayed in Aggregate of recycled concrete using calcium hydroxide solution;(2) carbon dioxide intensive treatment:The material obtained in step (1) is placed in closed carbonization case, 55 60 DEG C of carbonization treatments are complete to surface carbonation;(3) various raw materials according to following portions by weight are matched and mixed:76 85 parts of cement, 25 36 parts of flyash, 38 45 parts of treated recycled aggregate, 15 23 parts of hydroxycarboxylate, 20 30 parts of water.It is with short production cycle that the method for the present invention prepares regeneration concrete, and after carbonization treatment, the calcium carbonate of formation effectively fills micro-crack, and effectively reduce recycled aggregate porosity, and then reduces aggregate crush values, reduces aggregate water absorption rate.

Description

A kind of method that discarded concrete recycles
Technical field
The present invention relates to a kind of methods that discarded concrete recycles.
Background technology
According to relevant statistics, 35% discarded concrete is about discharged in China to root in Structural Engineering, remaining is pitch Concrete the like waste.According to rough Statistics, only the rubbish of old building is removed just up to more than 4,000 ten thousand tons every year by China, wherein disintegrating The occurrence quantity of old concrete is ten thousand tons about more than 1360, in addition, China's new cast about 2 billion cubic meter of concrete annual at present, because of quality Reason and just up to 4,800,000 tons of the discarded concrete discharged.Discarded concrete is processed into recycled aggregate for regeneration concrete Preparation not only solve problem of environmental pollution, also achieve resource reutilization, reduce the waste of resource and the energy.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of discarded concrete recycle method, especially by with Lower technical solution is realized:
A kind of method that discarded concrete recycles, this method comprises the following steps:
(1) screening obtains the Aggregate of recycled concrete that grain size is 11-15mm after discarded concrete is crushed, and use is a concentration of The calcium hydroxide solution of 0.05-0.25mol/kg is sprayed in Aggregate of recycled concrete;
(2) carbon dioxide intensive treatment:The material obtained in step (1) is placed in closed carbonization case, 55-60 DEG C of carbonization Processing is complete to surface carbonation;
(3) various raw materials according to following portions by weight are matched and mixed:It is 76-85 parts of cement, 25-36 parts of flyash, above-mentioned Treated 38-45 parts of recycled aggregate, 15-23 parts of hydroxycarboxylate, 20-30 parts of water.
Further, in the above-mentioned technical solutions, gas concentration lwevel is 20-65% (v/v) in closed carbonization case.
Invention advantageous effect
Method provided by the invention can effectively solve the problems, such as the recycling of building waste, and prepared by this method Regeneration concrete is with short production cycle, and after carbonization treatment, the calcium carbonate of formation effectively fills micro-crack, and effectively reduce Regenerated Bone Expect porosity, and then reduce aggregate crush values, reduce aggregate water absorption rate.
Specific embodiment
With reference to embodiment, the invention will be further described.
Embodiment 1
A kind of method that discarded concrete recycles, this method comprises the following steps:
(1) screening obtains the Aggregate of recycled concrete that grain size is 11-15mm after discarded concrete is crushed, and use is a concentration of The calcium hydroxide solution of 0.05mol/kg is sprayed in Aggregate of recycled concrete;
(2) carbon dioxide intensive treatment:The material obtained in step (1) is placed in closed carbonization case, at 55 DEG C of carbonizations Reason is complete to surface carbonation;Gas concentration lwevel is 20% (v/v) in closed carbonization case;
(3) various raw materials according to following portions by weight are matched and mixed:After 76 parts of cement, 36 parts of flyash, above-mentioned processing 45 parts of recycled aggregate, 23 parts of hydroxycarboxylate, 30 parts of water.
Embodiment 2
A kind of method that discarded concrete recycles, this method comprises the following steps:
(1) screening obtains the Aggregate of recycled concrete that grain size is 11-15mm after discarded concrete is crushed, and use is a concentration of The calcium hydroxide solution of 0.25mol/kg is sprayed in Aggregate of recycled concrete;
(2) carbon dioxide intensive treatment:The material obtained in step (1) is placed in closed carbonization case, at 60 DEG C of carbonizations Reason is complete to surface carbonation;Gas concentration lwevel is 65% (v/v) in closed carbonization case;
(3) various raw materials according to following portions by weight are matched and mixed:After 85 parts of cement, 36 parts of flyash, above-mentioned processing 45 parts of recycled aggregate, 15 parts of hydroxycarboxylate, 30 parts of water.
Embodiment 3
A kind of method that discarded concrete recycles, this method comprises the following steps:
(1) screening obtains the Aggregate of recycled concrete that grain size is 11-15mm after discarded concrete is crushed, and use is a concentration of The calcium hydroxide solution of 0.05-0.25mol/kg is sprayed in Aggregate of recycled concrete;
(2) carbon dioxide intensive treatment:The material obtained in step (1) is placed in closed carbonization case, 55-60 DEG C of carbonization Processing is complete to surface carbonation;Gas concentration lwevel is 45% (v/v) in closed carbonization case.
(3) various raw materials according to following portions by weight are matched and mixed:After 80 parts of cement, 30 parts of flyash, above-mentioned processing 40 parts of recycled aggregate, 20 parts of hydroxycarboxylate, 25 parts of water.
The preferred embodiment of the present invention described in detail above.It should be appreciated that those of ordinary skill in the art without Creative work is needed according to the present invention can to conceive and makes many modifications and variations.Therefore, all technologies in the art Personnel are analysed under this invention's idea by logic minute on the basis of existing technology, reasoning or limited experiment can obtain Technical solution, all should be in the protection domain being defined in the patent claims.

Claims (2)

1. a kind of method that discarded concrete recycles, it is characterised in that this method comprises the following steps:
(1) screening obtains the Aggregate of recycled concrete that grain size is 11-15mm after discarded concrete is crushed, and use is a concentration of The calcium hydroxide solution of 0.05-0.25mol/kg is sprayed in Aggregate of recycled concrete;
(2) carbon dioxide intensive treatment:The material obtained in step (1) is placed in closed carbonization case, 55-60 DEG C of carbonization treatment It is complete to surface carbonation;
(3) various raw materials according to following portions by weight are matched and mixed:76-85 parts of cement, 25-36 parts of flyash, above-mentioned processing 15-23 parts of 38-45 parts of recycled aggregate afterwards, hydroxycarboxylate, 20-30 parts of water.
2. the method that discarded concrete recycles according to claim 1, it is characterised in that:Titanium dioxide in closed carbonization case Concentration of carbon is 20-65%.
CN201611184504.9A 2016-12-20 2016-12-20 A kind of method that discarded concrete recycles Pending CN108203261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611184504.9A CN108203261A (en) 2016-12-20 2016-12-20 A kind of method that discarded concrete recycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611184504.9A CN108203261A (en) 2016-12-20 2016-12-20 A kind of method that discarded concrete recycles

Publications (1)

Publication Number Publication Date
CN108203261A true CN108203261A (en) 2018-06-26

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Country Status (1)

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CN (1) CN108203261A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109320290A (en) * 2018-11-02 2019-02-12 山西大学 A kind of processing method of concrete prefabricated product enhancing carbon sequestration
CN109534433A (en) * 2018-12-17 2019-03-29 陕西理工大学 A kind of building waste environment-friendly treatment method
CN109851266A (en) * 2019-01-21 2019-06-07 北京工业大学 A kind of aggregate processing method enhancing construction refuse regenerated concrete chlorine salt resistant erosion performance
CN110653037A (en) * 2019-10-22 2020-01-07 滁州市富邦商品混凝土有限公司 Preparation device and method for waste concrete fine aggregate
CN111170687A (en) * 2020-02-19 2020-05-19 广东派安建材有限公司 Method for manufacturing recycled aggregate green concrete
CN114890704A (en) * 2022-06-30 2022-08-12 深圳市衡骏环保科技有限公司 Preparation method of carbon dioxide curing recycled aggregate
CN114956694A (en) * 2022-06-30 2022-08-30 深圳市衡骏环保科技有限公司 Recycled aggregate concrete maintained by carbon dioxide
CN115231871A (en) * 2022-06-21 2022-10-25 宝鸡市东大洋混凝土有限公司 Recycled aggregate concrete and preparation method thereof
CN115321861A (en) * 2022-08-10 2022-11-11 香港理工大学 Method for absorbing carbon and fixing carbon by utilizing concrete porous aggregate and concrete
CN115608745A (en) * 2022-10-14 2023-01-17 太仓金马智能装备有限公司 System and method for producing carbon-fixing recycled aggregate by using building decoration garbage

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109320290A (en) * 2018-11-02 2019-02-12 山西大学 A kind of processing method of concrete prefabricated product enhancing carbon sequestration
CN109534433B (en) * 2018-12-17 2021-09-03 陕西理工大学 Environment-friendly treatment method for construction waste
CN109534433A (en) * 2018-12-17 2019-03-29 陕西理工大学 A kind of building waste environment-friendly treatment method
CN109851266A (en) * 2019-01-21 2019-06-07 北京工业大学 A kind of aggregate processing method enhancing construction refuse regenerated concrete chlorine salt resistant erosion performance
CN110653037B (en) * 2019-10-22 2021-12-28 滁州市富邦商品混凝土有限公司 Preparation device and method for waste concrete fine aggregate
CN110653037A (en) * 2019-10-22 2020-01-07 滁州市富邦商品混凝土有限公司 Preparation device and method for waste concrete fine aggregate
CN111170687A (en) * 2020-02-19 2020-05-19 广东派安建材有限公司 Method for manufacturing recycled aggregate green concrete
CN115231871A (en) * 2022-06-21 2022-10-25 宝鸡市东大洋混凝土有限公司 Recycled aggregate concrete and preparation method thereof
CN114890704A (en) * 2022-06-30 2022-08-12 深圳市衡骏环保科技有限公司 Preparation method of carbon dioxide curing recycled aggregate
CN114956694A (en) * 2022-06-30 2022-08-30 深圳市衡骏环保科技有限公司 Recycled aggregate concrete maintained by carbon dioxide
CN115321861A (en) * 2022-08-10 2022-11-11 香港理工大学 Method for absorbing carbon and fixing carbon by utilizing concrete porous aggregate and concrete
CN115321861B (en) * 2022-08-10 2023-08-15 香港理工大学 Method for absorbing and fixing carbon by utilizing concrete porous aggregate and concrete
CN115608745A (en) * 2022-10-14 2023-01-17 太仓金马智能装备有限公司 System and method for producing carbon-fixing recycled aggregate by using building decoration garbage

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Application publication date: 20180626