CN101806116B - Hollow recycled concrete component prepared by carbon dioxide and preparation method - Google Patents
Hollow recycled concrete component prepared by carbon dioxide and preparation method Download PDFInfo
- Publication number
- CN101806116B CN101806116B CN2010101163239A CN201010116323A CN101806116B CN 101806116 B CN101806116 B CN 101806116B CN 2010101163239 A CN2010101163239 A CN 2010101163239A CN 201010116323 A CN201010116323 A CN 201010116323A CN 101806116 B CN101806116 B CN 101806116B
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- Prior art keywords
- concrete
- hollow
- carbon dioxide
- column
- regeneration concrete
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- 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.)
- Expired - Fee Related
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 175
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 124
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 52
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000008929 regeneration Effects 0.000 claims description 87
- 238000011069 regeneration method Methods 0.000 claims description 87
- 235000011089 carbon dioxide Nutrition 0.000 claims description 20
- 238000013467 fragmentation Methods 0.000 claims description 11
- 238000006062 fragmentation reaction Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000000859 sublimation Methods 0.000 claims description 6
- 230000008022 sublimation Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 16
- 239000002699 waste material Substances 0.000 abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract description 7
- 239000000920 calcium hydroxide Substances 0.000 abstract description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 5
- 239000000758 substrate Substances 0.000 abstract 5
- 230000036571 hydration Effects 0.000 abstract 1
- 238000006703 hydration reaction Methods 0.000 abstract 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 6
- 239000011575 calcium Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
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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
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- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a hollow recycled concrete component, which comprises concrete aggregate formed by fragmenting waste concrete, cement, water and a columnar substrate, wherein the cement and the water are stirred and mixed with the concrete aggregate formed by fragmenting the waste concrete to form recycled concrete; the columnar substrate accommodates the recycled concrete; and the recycled concrete is poured into the columnar substrate to form a cylindrical hollow core attached to the inner wall of the columnar substrate, and is reacted with carbon dioxide to form the hollow recycled concrete component after being formed in the columnar substrate. The recycled concrete component of the invention is formed by reacting the recycled concrete with the carbon dioxide, and the carbon dioxide and a hydration product calcium hydroxide of the cement undergo reaction to produce calcium carbonate which can improve a contact interface of the waste concrete aggregate and the cement paste, enhance the strength of the concrete and reduce holes of the concrete, so the durability of the concrete is improved.
Description
Technical field
The present invention relates to a kind of concrete component and preparation method, relate in particular to a kind of discarded concrete that utilizes and process hollow recycled concrete component and preparation method.
Background technology
Along with the development of society, all kinds of buildings and construction work are more and more, and concrete component is widely used in the post and foundation pile of tower structure, industrial premises and civilian construction.And, causing the building waste that a large amount of abandoned buildings form in the city along with the transformation in city, the processing of these building wastes not only needs large-area stockyard, but also the cost lot of manpower and material resources.Along with the development of building science, effectively utilize building waste to become a new problem.
In the prior art, the building waste that the abandoned building concrete is formed forms regeneration concrete after through fragmentation and carries out recycle, has not only handled a large amount of building wastes, and has saved constructional materials.But when utilizing discarded concrete as the aggregate of regeneration concrete, its boundary strength will be lower than the boundary strength of natural aggregate, thereby causes the intensity of regeneration concrete to be lower than ordinary concrete intensity.Simultaneously; Discarded concrete is during as aggregate; Its interface hole will be more than the interface hole of natural aggregate, and the water absorption rate of regeneration concrete is than higher, and this all can make the durability of making the regeneration concrete of aggregate with discarded concrete will be lower than the durability of ordinary concrete.
Summary of the invention
The technical problem that the present invention solves is: hollow recycled concrete component of the present invention and preparation method, overcome in the prior art, and when discarded concrete was made into regeneration concrete, intensity was low, the technical problem that durability is low.
Technical scheme of the present invention is: make up a kind of hollow recycled concrete component that utilizes the carbon dioxide preparation; Comprise by the concrete aggregate that forms after the discarded concrete fragmentation, cement, water; Stir the mixed regeneration concrete that forms with cement, water and by the concrete aggregate that forms after the discarded concrete fragmentation; The columnar shape basal of holding said regeneration concrete; Said regeneration concrete pours into and forms the hollow inwall that is attached to said columnar shape basal of column in the said columnar shape basal, after said regeneration concrete is shaped in said columnar shape basal, and said column hollow seal; Put into dry ice during said column is hollow, carbon dioxide that generates behind the said dry ice sublimation and said regeneration concrete reaction back form hollow recycled concrete component.
Further technical scheme of the present invention is: said columnar shape basal is a steel pipe.
Further technical scheme of the present invention is: it is hollow that the regeneration concrete in the said columnar shape basal forms column through centrifugal rotation.
Technical scheme of the present invention is: a kind of method of utilizing carbon dioxide to prepare hollow recycled concrete component is provided, comprises the steps:
Preparation regeneration concrete: with the discarded concrete and the mixed regeneration concrete that forms of cement paste of fragmentation;
It is hollow that regeneration concrete forms column: said regeneration concrete pours into and forms the hollow inwall that is attached to said columnar shape basal of column in the said columnar shape basal;
Form hollow recycled concrete component: said column hollow seal, put into dry ice during said column is hollow, carbon dioxide that generates behind the said dry ice sublimation and said regeneration concrete reaction back form hollow recycled concrete component.
Further technical scheme of the present invention is: form in the hollow step of column at regeneration concrete, it is hollow that the regeneration concrete in the said columnar shape basal forms column through centrifugal rotation.
Further technical scheme of the present invention is: in forming the hollow recycled concrete component step, said regeneration concrete also is included in maintenance in the steam that is higher than normal pressure after in said columnar shape basal, being shaped.
Further technical scheme of the present invention is: in the column of said regeneration concrete is hollow, put into dry ice and make the column hollow pressure of said regeneration concrete reach critical condition: said critical condition is: pressure is greater than 7.4mpa; Temperature is greater than 31 degrees centigrade, and said dry ice distils under said critical condition and produces supercritical carbon dioxide.
Technique effect of the present invention is: the present invention utilizes the hollow recycled concrete component of carbon dioxide preparation; With forming hollow recycled concrete component behind regeneration concrete and the carbon dioxide reaction; The hydrated product calcium hydroxide reaction of carbon dioxide and cement generates calcium carbonate, and calcium carbonate can improve the contact interface of discarded concrete aggregate and cement paste, strengthens concrete intensity; Reduce pore fluid of concrete, thereby improve concrete durability.
Description of drawings
Fig. 1 is a section of structure of the present invention.
Fig. 2 is a flow chart of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is further specified.
As shown in Figure 1; The specific embodiment of the present invention is: make up a kind of hollow recycled concrete component; Comprise by the concrete aggregate that forms after the discarded concrete fragmentation, cement, water; Stir with cement, water and by the concrete aggregate that forms after the discarded concrete fragmentation and mixedly to form regeneration concrete 2, also comprise the columnar shape basal 1 of holding said regeneration concrete 2, said regeneration concrete 2 pours into the inwall that formation column hollow 3 in the said columnar shape basal 1 is attached to said columnar shape basal 1; After said regeneration concrete 2 is shaped in said columnar shape basal 1, with forming hollow recycled concrete component behind said regeneration concrete 2 and the carbon dioxide reaction.Among the present invention, after said regeneration concrete 2 is shaped in said columnar shape basal 1, with forming hollow recycled concrete component behind said regeneration concrete 2 and the carbon dioxide reaction.Because (chemical formula is Ca (OH) to contain a large amount of calcium hydroxides in the regeneration concrete 2
2), again regeneration concrete 2 and carbon dioxide reaction are generated calcium carbonate, that is: Ca (OH)
2+ CO
2=CaCO
3+ H
2O; Because calcium carbonate is mixed in the contact interface that can improve discarded concrete aggregate and cement paste in the regeneration concrete 2; Strengthen the intensity of regeneration concrete 2; Reduce the hole of regeneration concrete 2, thereby improve the durability of regeneration concrete 2, improved the performance and the quality of hollow recycled concrete component so greatly.
In the specific embodiment of the present invention, carbon dioxide is passed in the said column hollow 3, carbon dioxide infiltrates in the regeneration concrete 2, with a large amount of calcium hydroxide reactions in the regeneration concrete 2 through hollow 3 walls of column.The present invention has also reduced the discharging of Carbon Dioxide in Air simultaneously, has improved environment.In the specific embodiment of the invention, said columnar shape basal 1 is a steel pipe.Forming column when hollow, pack into the amount fibrous root of said columnar shape basal of regeneration concrete 2 is confirmed according to the specific requirement of the hollow size of column.The said columnar shape basal 1 of regeneration concrete 2 of will packing into is put on the centrifuge rotates, and through rotation to a certain degree, the regeneration concrete 2 in the said columnar shape basal 1 is close to the inwall of said columnar shape basal 1, and the regeneration concrete post in be formed centrally column hollow 3.
As shown in Figure 1, preferred implementation of the present invention is: in the specific embodiment of the present invention, place the column of hollow recycled concrete component hollow 3 carbon dioxide, with the column hollow seal, so that the calcium hydroxide in carbon dioxide and the concrete fully reacts.Hollow 3 sealings of said column so both can guarantee regeneration concrete 2 and carbon dioxide reaction, can not waste carbon dioxide again.Specific embodiment of the present invention is: put into dry ice in the said column hollow 3, form the carbon dioxide of high pressure behind the said dry ice sublimation, it is more abundant that the carbon dioxide of high pressure can make carbon dioxide infiltrate, and carbon dioxide and said regeneration concrete 2 can react more fully.
As shown in Figure 2, the specific embodiment of the present invention is: a kind of method for preparing hollow recycled concrete component is provided, comprises the steps:
Step 100: preparation regeneration concrete 2: among the present invention, said concrete adopts the discarded concrete of city dismounting building as aggregate.At first, with the discarded concrete fragmentation; Stir the mixed regeneration concrete 2 that forms with cement, water and by the concrete aggregate that forms after the discarded concrete fragmentation.
Step 200: it is hollow that regeneration concrete forms column: earlier the regeneration concrete for preparing 2 is poured in the said columnar shape basal 1, pack into the amount fibrous root of said columnar shape basal of regeneration concrete 2 is confirmed according to the specific requirement of the hollow size of column.The said regeneration concrete that will pour into again in the said columnar shape basal forms the hollow inwall that is attached to said columnar shape basal of column.In the specific embodiment of the present invention; The said columnar shape basal 1 of regeneration concrete 2 of will packing into is put on the centrifuge rotates; Through to a certain degree rotation, the regeneration concrete 2 in the said columnar shape basal 1 is close to the inwall of said columnar shape basal 1, and the regeneration concrete post in be formed centrally column hollow 3.
Step 300: form hollow recycled concrete component: with said regeneration concrete and carbon dioxide reaction; That is: after said regeneration concrete 2 is shaped in said columnar shape basal 1, with forming hollow recycled concrete component behind said regeneration concrete 2 and the carbon dioxide reaction.Because (chemical formula is Ca (OH) to contain a large amount of calcium hydroxides in the regeneration concrete 2
2), again regeneration concrete 2 and carbon dioxide reaction are generated calcium carbonate, that is: Ca (OH)
2+ CO
2=CaCO
3+ H
2O because calcium carbonate is mixed in the contact interface that can improve discarded concrete aggregate and cement paste in the regeneration concrete 2, strengthens the intensity of regeneration concrete 2, reduces the hole of regeneration concrete 2, thereby improves the durability of regeneration concrete 2.In the specific embodiment of the present invention, carbon dioxide is passed in the said column hollow 3, carbon dioxide infiltrates in the regeneration concrete 2, with a large amount of calcium hydroxide reactions in the regeneration concrete 2 through hollow 3 walls of column.Among the present invention, carbon dioxide is passed in the hollow recycled concrete component through certain method, has reduced the discharging of Carbon Dioxide in Air, improved environment.
Preferred implementation of the present invention is: when said regeneration concrete 2 and carbon dioxide, hollow 3 sealings of said column so both can guarantee regeneration concrete 2 and carbon dioxide reaction, can not waste carbon dioxide again.Specific embodiment of the present invention is: put into dry ice in the said column hollow 3, carbon dioxide that generates behind the said dry ice sublimation and 2 reactions of said regeneration concrete.
Preferred implementation of the present invention is: in forming the hollow recycled concrete component step, said regeneration concrete 2 also is included in maintenance in the steam that is higher than normal pressure after in said columnar shape basal 1, being shaped.Be about to hollow recycled concrete component and be positioned in the environment that is higher than normal pressure, carry out maintenance through the mode of heating again, can shorten the formation time of hollow recycled concrete component like this, accelerate the formation of hollow recycled concrete component.And in this stage, also can make regeneration concrete 2 and carbon dioxide reaction simultaneously.
Preferred implementation of the present invention is: in the column of said regeneration concrete 2 hollow 3, put into dry ice and make hollow 3 pressure of column of said regeneration concrete 2 reach critical condition; Said critical condition is: pressure is greater than 7.4mpa; Temperature is greater than 31 degrees centigrade, and said dry ice distils under said critical condition and produces supercritical carbon dioxide.Specifically; The pressure of how much controlling in the column hollow 3 through the dry ice quality reaches critical pressure; Make temperature reach critical-temperature through external heat again; Thereby make dry ice become supercritical carbon dioxide, the carbon dioxide under supercriticality has the character of liquid and gas simultaneously, like this with Ca (OH)
2Reaction speed will accelerate, help the formation of calcium carbonate.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (7)
1. hollow recycled concrete component that utilizes carbon dioxide preparation; Comprise by the concrete aggregate that forms after the discarded concrete fragmentation, cement, water; Stir the mixed regeneration concrete that forms with cement, water and by the concrete aggregate that forms after the discarded concrete fragmentation; Also comprise the columnar shape basal of holding said regeneration concrete; Said regeneration concrete pours into and forms the hollow inwall that is attached to said columnar shape basal of column in the said columnar shape basal, after said regeneration concrete is shaped in said columnar shape basal, and said column hollow seal; Put into dry ice during said column is hollow, carbon dioxide that generates behind the said dry ice sublimation and said regeneration concrete reaction back form hollow recycled concrete component.
2. according to the said hollow recycled concrete component that utilizes the carbon dioxide preparation of claim 1, it is characterized in that said columnar shape basal is a steel pipe.
3. according to the said hollow recycled concrete component that utilizes the carbon dioxide preparation of claim 1, it is characterized in that it is hollow that the regeneration concrete in the said columnar shape basal forms column through centrifugal rotation.
4. a method of utilizing carbon dioxide to prepare hollow recycled concrete component comprises the steps:
Preparation regeneration concrete: with the discarded concrete and the mixed regeneration concrete that forms of cement paste of fragmentation;
It is hollow that regeneration concrete forms column: said regeneration concrete pours into and forms the hollow inwall that is attached to said columnar shape basal of column in the columnar shape basal;
Form hollow recycled concrete component: said column hollow seal, put into dry ice during said column is hollow, carbon dioxide that generates behind the said dry ice sublimation and said regeneration concrete reaction back form hollow recycled concrete component.
5. according to the said method of utilizing carbon dioxide to prepare hollow recycled concrete component of claim 4, it is characterized in that form in the hollow step of column at regeneration concrete, it is hollow that the regeneration concrete in the said columnar shape basal forms column through centrifugal rotation.
6. according to the said method of utilizing carbon dioxide to prepare hollow recycled concrete component of claim 4; It is characterized in that; In forming the hollow recycled concrete component step, said regeneration concrete also is included in maintenance in the steam that is higher than normal pressure after in said columnar shape basal, being shaped.
7. according to the said method of utilizing carbon dioxide to prepare hollow recycled concrete component of claim 4; It is characterized in that; In the column of said regeneration concrete is hollow, putting into dry ice makes the column hollow pressure of said regeneration concrete reach critical condition: said critical condition is: pressure is greater than 7.4mpa; Temperature is greater than 31 degrees centigrade, and said dry ice distils under said critical condition and produces supercritical carbon dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101163239A CN101806116B (en) | 2010-02-26 | 2010-02-26 | Hollow recycled concrete component prepared by carbon dioxide and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101163239A CN101806116B (en) | 2010-02-26 | 2010-02-26 | Hollow recycled concrete component prepared by carbon dioxide and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101806116A CN101806116A (en) | 2010-08-18 |
| CN101806116B true CN101806116B (en) | 2012-04-04 |
Family
ID=42608053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101163239A Expired - Fee Related CN101806116B (en) | 2010-02-26 | 2010-02-26 | Hollow recycled concrete component prepared by carbon dioxide and preparation method |
Country Status (1)
| Country | Link |
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| CN (1) | CN101806116B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798854B (en) * | 2010-02-26 | 2012-02-15 | 哈尔滨工业大学深圳研究生院 | Hollow concrete member and preparation method thereof |
| CN105837075B (en) * | 2015-07-07 | 2018-04-20 | 东南大学 | A kind of method using microbiological precipitation of CaCO 3 intensifying regenerating concrete fine aggregate |
| CN106431116A (en) * | 2016-09-30 | 2017-02-22 | 河海大学 | Building block prepared by taking recycled waste concrete as raw material and preparation method of building block |
| CN110497517A (en) * | 2019-09-02 | 2019-11-26 | 郑州航空工业管理学院 | A kind of hollow recycled concrete component and preparation method thereof using waste fiber preparation |
| CN110590259A (en) * | 2019-09-06 | 2019-12-20 | 深圳市永安环保实业有限公司 | Manufacturing method of recycled concrete pipe by taking construction waste as raw material |
| CN110744701A (en) * | 2019-10-30 | 2020-02-04 | 广西大学 | Manufacturing method of CFRP bar recycled concrete pole |
| CN111805710B (en) * | 2020-07-23 | 2021-07-30 | 淮北智淮科技有限公司 | Recycled concrete segment hollow square column mold and using method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2137275Y (en) * | 1992-06-22 | 1993-06-30 | 周万新 | Reinforced concrete wire pole with conic hollow core |
| US5725655A (en) * | 1996-09-17 | 1998-03-10 | Catterton; Robert L. | Method for new concrete from old concrete |
| CN2765965Y (en) * | 2004-03-10 | 2006-03-22 | 徐国林 | Hollow steel pipe concrete column |
| JP4625294B2 (en) * | 2004-09-09 | 2011-02-02 | 新日本製鐵株式会社 | How to use carbon dioxide |
| CN101139193B (en) * | 2007-08-21 | 2010-05-19 | 云南华威废弃物资源化有限公司 | Regenerative concrete composite material and method for making same |
| CN101343155B (en) * | 2008-08-29 | 2011-07-27 | 济南大学 | Regeneration aggregate made of carbonized maintaining castoff |
| CN101381215A (en) * | 2008-11-03 | 2009-03-11 | 梁林华 | Waste and old concrete module |
-
2010
- 2010-02-26 CN CN2010101163239A patent/CN101806116B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101806116A (en) | 2010-08-18 |
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Granted publication date: 20120404 |