CN101806116A - Hollow recycled concrete component and preparation method - Google Patents
Hollow recycled concrete component and preparation method Download PDFInfo
- Publication number
- CN101806116A CN101806116A CN201010116323A CN201010116323A CN101806116A CN 101806116 A CN101806116 A CN 101806116A CN 201010116323 A CN201010116323 A CN 201010116323A CN 201010116323 A CN201010116323 A CN 201010116323A CN 101806116 A CN101806116 A CN 101806116A
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- China
- Prior art keywords
- concrete
- hollow
- column
- regeneration concrete
- columnar shape
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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.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 185
- 238000002360 preparation method Methods 0.000 title claims description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 112
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 46
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 46
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 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 91
- 238000011069 regeneration method Methods 0.000 claims description 91
- 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 3
- 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
- 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
-
- 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
- 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 make 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 by fragmentation and carries out recyclingly, 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, comprise the concrete aggregate that forms by after the discarded concrete fragmentation, cement, water, with cement, water with stir the mixed regeneration concrete that forms by the concrete aggregate that forms after the discarded concrete fragmentation, the columnar shape basal of holding described regeneration concrete, described regeneration concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the described columnar shape basal, described regeneration concrete will form hollow recycled concrete component behind described regeneration concrete and the carbon dioxide reaction after being shaped in described columnar shape basal.
Further technical scheme of the present invention is: described columnar shape basal is a steel pipe.
Further technical scheme of the present invention is: it is hollow that the regeneration concrete in the described columnar shape basal forms column through centrifugal rotation.
Further technical scheme of the present invention is: described carbon dioxide places described concrete column hollow, described column hollow seal.
Further technical scheme of the present invention is: put into dry ice during described column is hollow, carbon dioxide that generates behind the described dry ice sublimation and the reaction of described regeneration concrete.
Technical scheme of the present invention is: a kind of method for preparing 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: described regeneration concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the described columnar shape basal;
Form hollow recycled concrete component: with described regeneration concrete and carbon dioxide reaction.
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 described columnar shape basal forms column through centrifugal rotation.
Further technical scheme of the present invention is: in forming the hollow recycled concrete component step, described regeneration concrete also is included in maintenance in the steam that is higher than normal pressure after being shaped in described columnar shape basal.
Further technical scheme of the present invention is: in forming the hollow recycled concrete component step, put into dry ice, carbon dioxide that generates behind the described dry ice sublimation and the reaction of described regeneration concrete.
Further technical scheme of the present invention is: put into dry ice and make the column hollow pressure of described regeneration concrete reach critical condition in the column of described regeneration concrete is hollow: described critical condition is: pressure is greater than 7.4mpa, temperature is greater than 31 degrees centigrade, and described dry ice distils under described critical condition and produces supercritical carbon dioxide.
Technique effect of the present invention is: hollow recycled concrete component of the present invention, to form 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, calcium carbonate can improve the contact interface of discarded concrete aggregate and cement paste, strengthen 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 solution 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 the concrete aggregate that forms by after the discarded concrete fragmentation, cement, water, with cement, water with stir the mixed regeneration concrete 2 that forms by the concrete aggregate that forms after the discarded concrete fragmentation, also comprise the columnar shape basal 1 of holding described regeneration concrete 2, described regeneration concrete 2 pours into and forms the inwall that column hollow 3 is attached to described columnar shape basal 1 in the described columnar shape basal 1, after described regeneration concrete 2 is shaped, will form hollow recycled concrete component behind described regeneration concrete 2 and the carbon dioxide reaction in described columnar shape basal 1.Among the present invention, after described regeneration concrete 2 is shaped, will form hollow recycled concrete component behind described regeneration concrete 2 and the carbon dioxide reaction in described columnar shape basal 1.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 described column hollow 3, carbon dioxide infiltrates in the regeneration concrete 2, with a large amount of calcium hydroxide reactions in the regeneration concrete 2 by 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, described columnar shape basal 1 is a steel pipe.Forming column when hollow, pack into the amount fibrous root of described columnar shape basal of regeneration concrete 2 is determined according to the specific requirement of the hollow size of column.The described 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 described columnar shape basal 1 is close to the inwall of described 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 embodiments of the 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 described column so both can guarantee regeneration concrete 2 and carbon dioxide reaction, can not waste carbon dioxide again.Specific embodiments of the invention are: put into dry ice in the described column hollow 3, form the carbon dioxide of high pressure behind the described dry ice sublimation, it is more abundant that the carbon dioxide of high pressure can make carbon dioxide infiltrate, and carbon dioxide and described 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, described 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 2 for preparing is poured in the described columnar shape basal 1, pack into the amount fibrous root of described columnar shape basal of regeneration concrete 2 is determined according to the specific requirement of the hollow size of column.The described regeneration concrete that will pour into again in the described columnar shape basal forms the hollow inwall that is attached to described columnar shape basal of column.In the specific embodiments of the invention, the described columnar shape basal 1 of regeneration concrete 2 of will packing into is put on the centrifuge rotates, through rotation to a certain degree, the regeneration concrete 2 in the described columnar shape basal 1 is close to the inwall of described columnar shape basal 1, and the regeneration concrete post in be formed centrally column hollow 3.
Step 300: form hollow recycled concrete component: with described regeneration concrete and carbon dioxide reaction, that is: after described regeneration concrete 2 is shaped, will form hollow recycled concrete component behind described regeneration concrete 2 and the carbon dioxide reaction in described columnar shape basal 1.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 embodiments of the invention, carbon dioxide is passed in the described column hollow 3, carbon dioxide infiltrates in the regeneration concrete 2, with a large amount of calcium hydroxide reactions in the regeneration concrete 2 by hollow 3 walls of column.Among the present invention, carbon dioxide is passed in the hollow recycled concrete component by certain method, has reduced the discharging of Carbon Dioxide in Air, improved environment.
Preferred implementation of the present invention is: when described regeneration concrete 2 and carbon dioxide, hollow 3 sealings of described column so both can guarantee regeneration concrete 2 and carbon dioxide reaction, can not waste carbon dioxide again.Specific embodiments of the invention are: put into dry ice in the described column hollow 3, carbon dioxide that generates behind the described dry ice sublimation and 2 reactions of described regeneration concrete.
Preferred implementation of the present invention is: in forming the hollow recycled concrete component step, described regeneration concrete 2 also is included in maintenance in the steam that is higher than normal pressure after being shaped in described columnar shape basal 1.Be about to hollow recycled concrete component and be positioned in the environment that is higher than normal pressure, carry out maintenance by 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: put into dry ice and make hollow 3 pressure of column of described regeneration concrete 2 reach critical condition in the column of described regeneration concrete 2 hollow 3, described critical condition is: pressure is greater than 7.4mpa, temperature is greater than 31 degrees centigrade, and described dry ice distils under described critical condition and produces supercritical carbon dioxide.Specifically, the pressure of how much controlling in the column hollow 3 by the dry ice quality reaches critical pressure, make temperature reach critical-temperature by external heat again, thereby make dry ice become supercritical carbon dioxide, 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 be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. hollow recycled concrete component, 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 described regeneration concrete, described regeneration concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the described columnar shape basal, described regeneration concrete will form hollow recycled concrete component behind described regeneration concrete and the carbon dioxide reaction after being shaped in described columnar shape basal.
2. hollow recycled concrete component according to claim 1 is characterized in that, described columnar shape basal is a steel pipe.
3. hollow recycled concrete component according to claim 1 is characterized in that, it is hollow that the regeneration concrete in the described columnar shape basal forms column through centrifugal rotation.
4. hollow recycled concrete component according to claim 1 is characterized in that, described carbon dioxide places described concrete column hollow, described column hollow seal.
5. hollow recycled concrete component according to claim 1 is characterized in that, puts into dry ice during described column is hollow, carbon dioxide that generates behind the described dry ice sublimation and the reaction of described regeneration concrete.
6. a method for preparing 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: described regeneration concrete pours into and forms the hollow inwall that is attached to described columnar shape basal of column in the described columnar shape basal;
Form hollow recycled concrete component: with described regeneration concrete and carbon dioxide reaction.
7. the method for preparing hollow recycled concrete component according to claim 5 is characterized in that, forms in the hollow step of column at regeneration concrete, and it is hollow that the regeneration concrete in the described columnar shape basal forms column through centrifugal rotation.
8. the method for preparing hollow recycled concrete component according to claim 5 is characterized in that, in forming the hollow recycled concrete component step, described regeneration concrete also is included in maintenance in the steam that is higher than normal pressure after being shaped in described columnar shape basal.
9. the method for preparing hollow recycled concrete component according to claim 5 is characterized in that, in forming the hollow recycled concrete component step, puts into dry ice, carbon dioxide that generates behind the described dry ice sublimation and the reaction of described regeneration concrete.
10. the method for preparing hollow recycled concrete component according to claim 9, it is characterized in that, putting into dry ice in the column of described regeneration concrete is hollow makes the column hollow pressure of described regeneration concrete reach critical condition: described critical condition is: pressure is greater than 7.4mpa, temperature is greater than 31 degrees centigrade, and described dry ice distils under described 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 true CN101806116A (en) | 2010-08-18 |
| CN101806116B 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 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011103754A1 (en) * | 2010-02-26 | 2011-09-01 | 哈尔滨工业大学深圳研究生院 | Hollow concrete component and method for preparing the same |
| CN105837075A (en) * | 2015-07-07 | 2016-08-10 | 东南大学 | Method of reinforcing regenerated concrete fine aggregate with microorganism depositing calcium carbonate |
| 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 |
| CN111805710A (en) * | 2020-07-23 | 2020-10-23 | 杨阳 | Recycled concrete segment hollow square column mold and using method thereof |
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2010
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011103754A1 (en) * | 2010-02-26 | 2011-09-01 | 哈尔滨工业大学深圳研究生院 | Hollow concrete component and method for preparing the same |
| CN105837075A (en) * | 2015-07-07 | 2016-08-10 | 东南大学 | Method of reinforcing regenerated concrete fine aggregate with microorganism depositing calcium carbonate |
| 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 |
| CN111805710A (en) * | 2020-07-23 | 2020-10-23 | 杨阳 | Recycled concrete segment hollow square column mold and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101806116B (en) | 2012-04-04 |
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Granted publication date: 20120404 |