CN101560073A - Method for recycling waste concrete - Google Patents
Method for recycling waste concrete Download PDFInfo
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- CN101560073A CN101560073A CNA2009100989094A CN200910098909A CN101560073A CN 101560073 A CN101560073 A CN 101560073A CN A2009100989094 A CNA2009100989094 A CN A2009100989094A CN 200910098909 A CN200910098909 A CN 200910098909A CN 101560073 A CN101560073 A CN 101560073A
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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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Abstract
The invention provides a method for recycling waste concrete, which comprises four steps of vibration screening, reshaping treatment, grinding treatment and mixing compounding. The method can reasonably solve the problem of the reutilization of the waste concrete; on the one hand, the problems of difficult treatment on a large amount of discarded waste concrete, adverse influence on the environment caused by the difficult treatment of a large amount of discarded waste concrete and the like are solved, so that the huge cost of transporting and treating wastes is saved; and on the other hand, the exploitation of natural sandstone is reduced, so that the method protects ecological environment and facilitates the sustainable development of human society.
Description
Technical field
The present invention relates to a kind of method of discarded concrete recycling.
Background technology
Cement concrete is the manufactured construction materials of consumption maximum up to now, be indispensable basic substance during human civilization is built, but Cement industry itself causes the situation of severe contamination but not obtain radical change to the dependence of natural resources with to environment.Propose in the National Program for Medium-to Long-term Scientific and Technological Development to develop application technology as the second resource such as abnormal pollution control techniques and waste, set up the technical show-how pattern of developing a circular economy.Therefore from the angle of resource reasonable development use and Sustainable development, it is very important to seek primary substitute of gathering materials.The domestic cement concrete pavement of building in early days is under traffic load and environmental factors effect, road surface breakage seriously is badly in need of repairing, a large amount of discarded concretes needs to handle after the pavement patching, not only can increase the maintenance cost but also also will cause negative impact as it not being dealt carefully with, and also be a kind of waste resource to surrounding enviroment.China has come into effect " the urban architecture waste management regulation " of Ministry of Construction promulgation on June 1st, 2005, this rules and regulations building waste dispose carry out minimizing, resource utilization, innoxious and who produce, who bears the principle of disposal responsibility.For the behavior of entity and individual, punish sternly economically not according to relevant regulations disposal building waste.These all provide good support for the regeneration of concrete debris.A lot of experts and scholars have carried out some basic researchs at concrete debris aspect utilizing, and in a lot of cities and area good try have been done in the recycling of concrete debris.
To the recycling of discarded concrete, the problems such as negative impact to environment that can solve the difficult treatment of a large amount of concrete debris and cause thus simultaneously can be saved a large amount of refuse collection expense and processing costs on the one hand; Regenerated aggregate substitutes natural aggregate and is applied in the concrete works on the other hand, can reduce the exploitation to natural sandstone, prevents the rivers and creeks ecological damage that causes because of overexploitation, thereby preserves the ecological environment, and helps the Sustainable development of human society.Concrete setting and harden is a process very slowly, the cement stone in the 28 days length of time, and the extent of hydration of cement has only about 60%.Some data show that concrete does not also finish fully through the time setting and harden in 28 years, that is to say, also have the activeconstituents that be beneficial to concrete hardening in the cement stone this moment.If classification behind discarded concrete fragmentation, the crushing and classification is utilized again, must play good promoter action to the strength development of regeneration concrete.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of discarded concrete recycling, can be reasonably to the discarded concrete recycling, thereby the problems such as negative impact to environment that solve a large amount of concrete debris difficult treatment and cause are thus saved a large amount of refuse collection expense and processing costss on the one hand; Reduce exploitation on the other hand, preserve the ecological environment, help the Sustainable development of human society natural sandstone.
For solving above-mentioned existing technical problem, the present invention adopts following scheme: a kind of method of discarded concrete recycling may further comprise the steps:
Step 1: the broken after vibration of discarded concrete is sieved out light weight sundries, obtain Aggregate of recycled concrete, artificial sand and fine powder that different grain size distributes;
Step 2: the Aggregate of recycled concrete and the artificial sand that obtain in the step 1 are carried out the shaping processing respectively, good Aggregate of recycled concrete, the artificial sand of preparation particle shape in stirring trimmer;
Step 3: the fine powder that in the fine powder that obtains in the step 1 and the step 2 Aggregate of recycled concrete, artificial sand is carried out obtaining after shaping is handled is carried out levigate processing in ball mill, make wherein the further efflorescence performance of the cement calculus activity of aquation grog composition not wherein;
Step 4: handle later resulting artificial sand and mix and be used to make the regeneration mortar or be used to prepare cement hollow building blocks after composite with carrying out shaping in the fine powder that carries out in the step 3 obtaining after the levigate processing and the step 2.
As preferably, discarded concrete carries out obtaining Aggregate of recycled concrete, artificial sand and fine powder with bolting behind the two-stage crushing through jaw crusher and impact grinder in the described step 1.
As preferably, contain scrap steel in the described discarded concrete, before vibrosieve, utilize the magnetic separator electromagnetic separation to go out scrap steel in the described step 1 after the discarded concrete fragmentation.
As preferably, carry out shaping in the described step 2 and handle between Aggregate of recycled concrete later and the artificial sand average particle size scope distribution 2～25mm.
As preferably, carry out tap density that shaping handles Aggregate of recycled concrete later in the described step 2 at 1.3～1.6 tons/cubic metre, particle does not have obvious sharp keen corner angle.
As preferably, the fineness in the described step 3 after the further efflorescence of cement calculus is at 200 order percent of pass more than 95%.
Beneficial effect:
The present invention adopts technique scheme that a kind of method of discarded concrete recycling is provided, can be reasonably to the discarded concrete recycling, the problems such as negative impact to environment that solved a large amount of concrete debris difficult treatment and caused have thus been saved a large amount of refuse collection expense and processing costs on the one hand; Reduced exploitation on the other hand, preserved the ecological environment, helped the Sustainable development of human society natural sandstone.
Figure of description
Fig. 1 is a process flow sheet of the present invention.
Embodiment
As Fig. 1, a kind of method of discarded concrete recycling may further comprise the steps:
Step 1: the discarded concrete that will contain scrap steel carries out utilizing the magnetic separator electromagnetic separation to go out scrap steel behind the two-stage crushing through jaw crusher and impact grinder, go out light weight sundries with bolting again, obtain Aggregate of recycled concrete, artificial sand and fine powder;
Step 2: the Aggregate of recycled concrete and the artificial sand that obtain in the step 1 are carried out the shaping processing respectively in stirring trimmer, good Aggregate of recycled concrete, the artificial sand of preparation particle shape, carrying out shaping handles between Aggregate of recycled concrete later and the artificial sand average particle size scope distribution 2～25mm, the tap density of carrying out the Aggregate of recycled concrete after shaping is handled is at 1.3～1.6 tons/cubic metre, and particle does not have obvious sharp keen corner angle;
Step 3: the fine powder that in the fine powder that obtains in the step 1 and the step 2 Aggregate of recycled concrete, artificial sand is carried out obtaining after shaping is handled is carried out levigate processing in ball mill, make wherein the further efflorescence performance of the cement calculus activity of aquation grog composition not wherein, the fineness in the described step 3 after the further efflorescence of cement calculus is at 200 order percent of pass more than 95%;
Step 4: handle later resulting artificial sand and mix and be used to make the regeneration mortar or be used to prepare cement hollow building blocks after composite with carrying out shaping in the fine powder that carries out in the step 3 obtaining after the levigate processing and the step 2.
During actually operating, consider that present China labor cost is relatively low, and machinery is not suitable for handling bulk impurity, therefore generally can selects end user worker's method that the waste concrete piece is carried out sorting and remove scrap steel and timber.Manually separates in view of fine impurity such as iron filings and broken plastics are difficult to adopt, employing magnetic separator and separating table are so that the purity that raising is gathered materials.Sieve by vibrating screen classifier or sieve apparatus, obtain the regenerated aggregate of different-grain diameter,, obtain Aggregate of recycled concrete, artificial sand and fine sand washing gathering materials of 2～25mm particle diameter.Thereby at high water-intake rate height, the shortcoming that intensity is low of causing of the concrete pore rate of Aggregate of recycled concrete manufacturing, the Aggregate of recycled concrete that screening obtains is carried out corner angle passivation and surface grinding processing, thus the fine powder that obtains the good Aggregate of recycled concrete of particle shape and get off from surface friction.
A kind of scheme for preparing cement hollow building blocks: the useless brick that will remove old building earlier is crushed to granularity 2～25mm in jaw crusher, after fine powder with 10%, 25% artificial sand, 10% cement, 30% useless brick, 20% flyash, 5% gypsum mix, by water-solid ratio is 0.15 mixing back pressure forming, the examination mould is of a size of 240 * 115 * 55mm, forming pressure is 20Mpa, examination body after the moulding is 90% in relative humidity, and temperature is maintenance 28 days under 20 ℃ the environment.The cement hollow building blocks physicals of preparation moulding verifies as salable product according to GB15229-94.
Claims (6)
1. the method for a discarded concrete recycling is characterized in that: may further comprise the steps:
Step 1: the broken after vibration of discarded concrete is sieved out light weight sundries, obtain Aggregate of recycled concrete, artificial sand and fine powder that different grain size distributes;
Step 2: the Aggregate of recycled concrete and the artificial sand that obtain in the step 1 are carried out the shaping processing respectively, good Aggregate of recycled concrete, the artificial sand of preparation particle shape in stirring trimmer;
Step 3: the fine powder that in the fine powder that obtains in the step 1 and the step 2 Aggregate of recycled concrete, artificial sand is carried out obtaining after shaping is handled is carried out levigate processing in ball mill, make wherein the further efflorescence performance of the cement calculus activity of aquation grog composition not wherein;
Step 4: handle later resulting artificial sand and mix and be used to make the regeneration mortar or be used to prepare cement hollow building blocks after composite with carrying out shaping in the fine powder that carries out in the step 3 obtaining after the levigate processing and the step 2.
2. the method for a kind of discarded concrete recycling according to claim 1 is characterized in that: discarded concrete carries out obtaining Aggregate of recycled concrete, artificial sand and fine powder with bolting behind the two-stage crushing through jaw crusher and impact grinder in the described step 1.
3. the method for a kind of discarded concrete recycling according to claim 1, it is characterized in that: contain scrap steel in the described discarded concrete, before vibrosieve, utilize the magnetic separator electromagnetic separation to go out scrap steel in the described step 1 after the discarded concrete fragmentation.
4. the method for a kind of discarded concrete recycling according to claim 1 is characterized in that: carry out shaping in the described step 2 and handle between Aggregate of recycled concrete later and the artificial sand average particle size scope distribution 2～25mm.
5. the method for a kind of discarded concrete recycling according to claim 1 is characterized in that: the tap density of carrying out the Aggregate of recycled concrete after shaping is handled in the described step 2 is at 1.3～1.6 tons/cubic metre, and particle does not have obvious sharp keen corner angle.
6. the method for a kind of discarded concrete recycling according to claim 1 is characterized in that: the fineness in the described step 3 after the further efflorescence of cement calculus is at 200 order percent of pass more than 95%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100989094A CN101560073A (en) | 2009-05-25 | 2009-05-25 | Method for recycling waste concrete |
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| CNA2009100989094A CN101560073A (en) | 2009-05-25 | 2009-05-25 | Method for recycling waste concrete |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922236A (en) * | 2010-07-21 | 2010-12-22 | 中铁二十局集团第四工程有限公司 | The C50 made sand ultra-high pump concrete construction method |
| CN102847703A (en) * | 2012-09-17 | 2013-01-02 | 北京丰旭晟工程技术有限公司 | Method for producing clean recycled soil and recycled aggregate by using construction waste |
| CN103693875A (en) * | 2013-11-28 | 2014-04-02 | 广州世正环保科技发展有限公司 | Production process for recycling premixed concrete solid waste residues |
| CN103711252A (en) * | 2013-12-26 | 2014-04-09 | 深圳大学 | Method and process for preparing straw wall units by using recycled straw wall units |
| CN104671684A (en) * | 2013-12-30 | 2015-06-03 | 王明斌 | Recovery processing method for construction garbage |
| CN105367004A (en) * | 2015-11-27 | 2016-03-02 | 山西四建集团有限公司 | C30 durable recycled shaping aggregate concrete prepared from construction wastes and preparation method |
| CN106242400A (en) * | 2016-08-03 | 2016-12-21 | 韦振兴 | A kind of method utilizing aggregate to prepare new material |
| CN106930167A (en) * | 2017-03-22 | 2017-07-07 | 泰州职业技术学院 | A kind of concrete debris regenerated aggregate warm-mixed asphalt thin overlay structure and its construction method |
| CN108911596A (en) * | 2018-06-25 | 2018-11-30 | 浙江大学宁波理工学院 | Assembled regenerates small concrete block masonry and preparation method thereof entirely |
| CN109465104A (en) * | 2018-10-20 | 2019-03-15 | 深圳市宏恒星再生科技有限公司 | Remaining body refuse soil processing method |
| CN109678377A (en) * | 2019-01-28 | 2019-04-26 | 长沙紫宸科技开发有限公司 | A method of amendment building waste granule materials produce high-quality regeneration sand material |
| CN109776012A (en) * | 2019-02-26 | 2019-05-21 | 邝文辉 | The regeneration method of discarded concrete mixture |
| CN110078427A (en) * | 2019-05-15 | 2019-08-02 | 邝文辉 | Material and concrete integration green production process system |
| CN110104976A (en) * | 2019-05-15 | 2019-08-09 | 邝文辉 | Building waste recycling, aggregate and concrete integrated production system |
| CN110215999A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of Machine-made Sand lapicide's skill of short route |
| CN113775017A (en) * | 2021-07-22 | 2021-12-10 | 长沙理工大学 | Preparation and recycling method of sponge concrete |
| CN113831073A (en) * | 2021-09-27 | 2021-12-24 | 清华大学 | Building mortar regeneration and cyclic utilization method and system |
| CN114409287A (en) * | 2021-12-17 | 2022-04-29 | 金创建设集团有限公司 | Recycling method of building concrete |
-
2009
- 2009-05-25 CN CNA2009100989094A patent/CN101560073A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922236B (en) * | 2010-07-21 | 2014-03-05 | 中铁二十局集团第四工程有限公司 | C50 machine-made sand ultra-high pump concrete construction method |
| CN101922236A (en) * | 2010-07-21 | 2010-12-22 | 中铁二十局集团第四工程有限公司 | The C50 made sand ultra-high pump concrete construction method |
| CN102847703A (en) * | 2012-09-17 | 2013-01-02 | 北京丰旭晟工程技术有限公司 | Method for producing clean recycled soil and recycled aggregate by using construction waste |
| CN102847703B (en) * | 2012-09-17 | 2015-05-20 | 北京丰旭晟工程技术有限公司 | Method for producing clean recycled soil and recycled aggregate by using construction waste |
| CN103693875A (en) * | 2013-11-28 | 2014-04-02 | 广州世正环保科技发展有限公司 | Production process for recycling premixed concrete solid waste residues |
| CN103711252A (en) * | 2013-12-26 | 2014-04-09 | 深圳大学 | Method and process for preparing straw wall units by using recycled straw wall units |
| CN104671684A (en) * | 2013-12-30 | 2015-06-03 | 王明斌 | Recovery processing method for construction garbage |
| CN105367004A (en) * | 2015-11-27 | 2016-03-02 | 山西四建集团有限公司 | C30 durable recycled shaping aggregate concrete prepared from construction wastes and preparation method |
| CN106242400A (en) * | 2016-08-03 | 2016-12-21 | 韦振兴 | A kind of method utilizing aggregate to prepare new material |
| CN106242400B (en) * | 2016-08-03 | 2019-10-18 | 韦振兴 | A method of material is prepared using aggregate |
| CN106930167B (en) * | 2017-03-22 | 2019-03-26 | 泰州职业技术学院 | A kind of concrete debris regenerated aggregate warm-mixed asphalt thin overlay structure and its construction method |
| CN106930167A (en) * | 2017-03-22 | 2017-07-07 | 泰州职业技术学院 | A kind of concrete debris regenerated aggregate warm-mixed asphalt thin overlay structure and its construction method |
| CN108911596A (en) * | 2018-06-25 | 2018-11-30 | 浙江大学宁波理工学院 | Assembled regenerates small concrete block masonry and preparation method thereof entirely |
| CN109465104A (en) * | 2018-10-20 | 2019-03-15 | 深圳市宏恒星再生科技有限公司 | Remaining body refuse soil processing method |
| CN109678377A (en) * | 2019-01-28 | 2019-04-26 | 长沙紫宸科技开发有限公司 | A method of amendment building waste granule materials produce high-quality regeneration sand material |
| CN109776012A (en) * | 2019-02-26 | 2019-05-21 | 邝文辉 | The regeneration method of discarded concrete mixture |
| CN110078427A (en) * | 2019-05-15 | 2019-08-02 | 邝文辉 | Material and concrete integration green production process system |
| CN110104976A (en) * | 2019-05-15 | 2019-08-09 | 邝文辉 | Building waste recycling, aggregate and concrete integrated production system |
| CN110215999A (en) * | 2019-06-18 | 2019-09-10 | 日昌升集团有限公司 | A kind of Machine-made Sand lapicide's skill of short route |
| CN110215999B (en) * | 2019-06-18 | 2020-10-09 | 日昌升集团有限公司 | Short-flow machine-made sandstone process |
| CN113775017A (en) * | 2021-07-22 | 2021-12-10 | 长沙理工大学 | Preparation and recycling method of sponge concrete |
| CN113831073A (en) * | 2021-09-27 | 2021-12-24 | 清华大学 | Building mortar regeneration and cyclic utilization method and system |
| CN114409287A (en) * | 2021-12-17 | 2022-04-29 | 金创建设集团有限公司 | Recycling method of building concrete |
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Open date: 20091021 |