CN108203261A - A kind of method that discarded concrete recycles - Google Patents
A kind of method that discarded concrete recycles Download PDFInfo
- 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
- Authority
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003763 carbonization Methods 0.000 claims abstract description 19
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000011282 treatment Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims abstract description 6
- 239000010881 fly ash Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 1
- 229910052799 carbon Inorganic materials 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 4
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B20/023—Chemical treatment
-
- 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
Landscapes
- 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
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%.
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 |
Family
ID=62603265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611184504.9A Pending CN108203261A (en) | 2016-12-20 | 2016-12-20 | A kind of method that discarded concrete recycles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108203261A (en) |
Cited By (10)
| 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 |
-
2016
- 2016-12-20 CN CN201611184504.9A patent/CN108203261A/en active Pending
Cited By (13)
| 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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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180626 |