CN102219405A - Recycling of construction wastes - Google Patents
Recycling of construction wastes Download PDFInfo
- Publication number
- CN102219405A CN102219405A CN2010101465900A CN201010146590A CN102219405A CN 102219405 A CN102219405 A CN 102219405A CN 2010101465900 A CN2010101465900 A CN 2010101465900A CN 201010146590 A CN201010146590 A CN 201010146590A CN 102219405 A CN102219405 A CN 102219405A
- Authority
- CN
- China
- Prior art keywords
- cement
- building waste
- consumption
- gypsum
- recycling
- 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.)
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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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
-
- 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
Abstract
The invention discloses the recycling of construction wastes. In the recycling, construction wastes, plasters and cement clinkers are taken as raw materials, and the process comprises the steps of weighing and blending, fine grinding, grain inspection, performance test, and finished product packaging. The construction waste mainly comprises waste bricks, and comprises the ingredients according to proportions as follows: 80-100Wt% of waster bricks, 0-1.0Wt% of organic substance and 0-5.0Wt% of metal. Before material is prepared, the construction waste can be crushed into particles being 0mm and smaller than or equal to 40mm; the plaster is plaster stone or semi-hydrated plaster, and is crushed into particles being 0mm and smaller than or equal to 40mm before the material is prepared; and the cement clinker has the tensile strength being larger than 27.0MPa in three days, and the main chemical components needs to conform to the following requirements: 65.0-70.0Wt% of CaO, 19.0-23.0Wt% of SiO2, 3-6Wt% of Al2O3 and 2.5-5.0Wt% of Fe2O3. In the invention, the construction waste mainly comprising the waste brick is taken as the main raw material for preparing cement, so that the adverse effect on the environment caused by the main construction waste formed by the reconstruction of old cities in China can be relieved, and a great amount of cement clinkers can be saved.
Description
Technical field
The present invention relates to a kind of ceramic, relate in particular to a kind of recycling of building waste.
Background technology
At building field, along with the fast development of urban architecture industry, the quantity of building waste grows with each passing day, and the output of the annual urban architecture rubbish of China is ten thousand tons of 4000-5000 according to statistics, and the main component of urban architecture rubbish is useless brick.The bad mechanical property of building waste, in the highway engineering industry regulation not directly with building waste as roadbed material, again because building waste is incombustible, so building waste is all handled by landfill, the grain bin section of letting go, these processing modes all need to take a large amount of soils and consume a large amount of processing funds, and contaminate environment.Therefore, seek a kind of new processing mode and seem particularly important.
Common cement type has 7 principal items such as silicate cement, ordinary Portland cement, Portland blast, Portland fly ash cement, portland-pozzolan cement, composite Portland cement, slag silicate cement both at home and abroad.Various industrial residues are widely used in cement manufacturing industry as the blended material with potential hydraulically active.Wherein blast-furnace slag, flyash are most widely used, and consumption is also maximum.But not with building waste or useless brick powder as the main blended material of cement or as the report of the main raw material of cement.
Summary of the invention
The purpose of this invention is to provide a kind of recycling of building waste, solve handling problem, make these solid waste resource recoveries and produce higher added value, reduce the environmental pollution in the cement sintering process simultaneously based on the municipal wastes of useless brick.
The simple sorting of municipal wastes process based on useless brick, remove materials such as too much organism, clay, metal, the useless brick content of remaining part can reach more than the 80Wt%, mainly the sand-lime that uses in the building process about all the other 20Wt%, react weathering year in year out for a long time, its essential mineral composition is mineral such as quartz, feldspar, calcite and hydrated calcium silicate.These compositions do not have too big disadvantageous effect to cement involved in the present invention after levigate.The main raw material of firing building brick is a clay, through 900-1000 ℃ fire after major part change kaolinite into, main component be silicate glass mutually and other silicate minerals.These materials have good hydraulically active after fully levigate.These materials with hydraulically active when having free water to exist can with formed Ca (OH) after the cement clinker aquation
2Thereby the formation C-S-H gel that reacts has very strong gelling property.Useless brick is the porous mass that is formed by vitrified bond, use common cement mill very easily levigate, (calculate) its energy consumption when being ground to the same fineness of cement has only about half of grinding cement clinker, compares its energy consumption with slag with ground slag and have only about 30% with specific surface area.In addition, submicron particles or nano particle often occur in levigate brick powder, the ultra-fine effect of this a small amount of material also can produce considerable influence to the gain in strength of cement stone.
It is based on useless brick that a kind of recycling of building waste, building waste require, and useless brick content is at 80-100Wt%; Organic content is at 0-1.0Wt%; Metal content is at 0-5.0Wt%; Building waste should be fractured into greater than 0mm and smaller or equal to the particle of 40mm before batching; Gypsum is meant plaster stone or semi-hydrated gypsum, and gypsum is broken into before batching greater than 0mm and smaller or equal to the particle of 40mm; 3 days tensile strength of used cement clinker should be greater than 27.0MPa, and main chemical compositions should meet following requirement: following all by weight percentage, CaO is 65.0-70.0Wt%; SiO
2Be 19.0-23.0Wt%; Al
2O
3Be 3-6Wt; Fe
2O
3Be 2.5-5.0Wt%.
Batching and levigate:
Starting material are pressed building waste 40.0-65.0Wt%, cement clinker 30.0-55.0Wt%, gypsum 4.0-6.0Wt% prepares burden, and joins after preliminary the mixing to carry out levigately in the cement mill, and the fineness requirement of levigate mixture reaches 3500-4500cm
2/ g, and when levigate, add the tensio-active agent of 0.5-5.0Wt%.
Produce No. 52.5 cement, the consumption of building waste should be at 40.0-45.0Wt%; The consumption of cement clinker should be at 50.0-55.0Wt%; The consumption of gypsum is at 4.5-5.5Wt%; Grinding rate should be at 4000-4500cm
2/ g; And when levigate, add the tensio-active agent of 0.5-5.0Wt%.
Produce No. 42.5 cement, the consumption of building waste should be at 45.0-50.0Wt%; The consumption of cement clinker should be at 45.0-50.0Wt%; The consumption of gypsum is at 4.5-5.5Wt%; Grinding rate should be at 3700-4200cm
2/ g.
Produce No. 32.5 cement, the consumption of building waste should be at 50.0-60.0Wt%; The consumption of cement clinker should be at 35.0-45.0Wt%; The consumption of gypsum is at 4.0-6.0Wt%; Grinding rate should be at 3500-4000cm
2/ g.
Produce No. 27.5 cement, the consumption of building waste should be at 60.0-65.0Wt%; The consumption of cement clinker should be at 30.0-35.0Wt%; The consumption of gypsum is at 4.0-6.0Wt%; Grinding rate should be at 3000-3500cm
2/ g.
The present invention is that main raw material(s) prepares cement except alleviating the disadvantageous effect of the formed main building waste of China's reconstruction of the old city town to environment based on the building waste of useless brick, can also save a large amount of cement clinkers.The present invention prepares one ton of cement and saves cement clinker 200-300kg than existing Portland cement technology of preparing, thus few CO that in atmosphere, discharges
2200-300Kg, other atmospheric polluting material also can corresponding minimizing 20.0-30.0Wt%.Aspect economic benefit, except the cost that the minimizing calcining cement clinker is saved, the grindability of useless brick also makes levigate cost decline 10-20%.
Embodiment
Below in conjunction with embodiment to invention is described further.
Embodiment 1
Press building waste consumption 50.0Wt%, cement clinker consumption 45.0Wt%, gypsum consumption 5.0Wt% prepares burden, and is 4000cm through be milled down to specific surface area in cement mill
2/ g, and when levigate, add the tensio-active agent of 0.5Wt%.Through 3 days, 28 days and strength trial in 60 days test, it the results are shown in Table 1.
Strength of cement mortar test result when table 1 building waste add-on is 50.0Wt%
Prepared cement meets the strength criterion of No. 42.5 composite Portland cements in the GB12958-1999 standard in the present embodiment as can be seen from Table 1, and later strength to increase surplus bigger, and very high folding strength is arranged.Other performance of cement meets the GB-12958-1999 standard in the present embodiment.
Embodiment 2
Press building waste consumption 55.0Wt%, cement clinker consumption 40.0Wt%, gypsum consumption 5.0Wt% prepares burden, and is 3700cm through be milled down to specific surface area in cement mill
2/ g, and when levigate, add the tensio-active agent of 5Wt%.Through 3 days, 28 days and strength trial in 60 days test, it the results are shown in Table 2.
Strength of cement mortar test result when table 2 building waste add-on is 55.0Wt%
Prepared cement meets No. 32.5 cement intensity standards in the GB12958-1999 standard in the present embodiment as can be seen from Table 1, and later strength growth surplus is bigger, and very high folding strength is arranged.Other performance of cement meets the GB-12958-1999 standard in the present embodiment.
Embodiment 3
With cement prepared among the embodiment in following ratio concrete batching:
Cement: 528kg/m
3
Composite water-reducing agent: 5.34kg/m
3
Coarse aggregate (lime rock, hand breaking forms): 1050kg/m
3
Fine aggregate (river sand): 690kg/m
3
Water: 214kg/m
3
Concrete strength and the slump prepared see Table 3.
Concrete strength and slump that table 3 is prepared with cement prepared among the embodiment 1
Concrete other performance meets GBJ80-85 in the present embodiment, GBJ81-85, GBJ82-85, GBJ55-81, GBJ63-89 standard.
Claims (6)
1. the recycling of a building waste, with building waste, gypsum, cement clinker is raw material, and its technological process of production is: weighing mixing, fine grinding, grain inspection, Performance Detection, finished product packing is characterized in that, it is based on useless brick that building waste requires, and useless brick content is at 80-100Wt%; Organic content is at 0-1.0Wt%; Metal content is at 0-5.0Wt%; Building waste should be fractured into greater than 0mm and smaller or equal to the particle of 40mm before batching; Gypsum is meant plaster stone or semi-hydrated gypsum, and gypsum is broken into before batching greater than 0mm and smaller or equal to the particle of 40mm; 3 days tensile strength of used cement clinker should be greater than 27.0MPa, and main chemical compositions should meet following requirement: following all by weight percentage, CaO is 65.0-70.0Wt%; SiO
2Be 19.0-23.0Wt%; Al
2O
3Be 3-6Wt; Fe
2O
3Be 2.5-5.0Wt%.
2. the recycling of a kind of building waste as claimed in claim 1, it is characterized in that, starting material are pressed building waste 40.0-65.0Wt%, cement clinker 30.0-55.0Wt%, gypsum 4.0-6.0Wt%, prepare burden, join after preliminary the mixing and carry out levigately in the cement mill, the fineness requirement of levigate mixture reaches 3500-4500cm
2/ g, and when levigate, add the tensio-active agent of 0.5-5.0Wt%.
3. the recycling of a kind of building waste as claimed in claim 1 or 2 is characterized in that, produces No. 52.5 cement, and the consumption of building waste should be at 40.0-45.0Wt%; The consumption of cement clinker should be at 50.0-55.0Wt%; The consumption of gypsum is at 4.5-5.5Wt%; Grinding rate should be at 4000-4500cm
2/ g; And when levigate, add the tensio-active agent of 0.5-5.0Wt%.
4. the recycling of a kind of building waste as claimed in claim 1 or 2 is characterized in that, produces No. 42.5 cement, and the consumption of building waste should be at 45.0-50.0Wt%; The consumption of cement clinker should be at 45.0-50.0Wt%; The consumption of gypsum is at 4.5-5.5Wt%; Grinding rate should be at 3700-4200cm
2/ g.
5. the recycling of a kind of building waste as claimed in claim 1 or 2 is characterized in that, produces No. 32.5 cement, and the consumption of building waste should be at 50.0-60.0Wt%; The consumption of cement clinker should be at 35.0-45.0Wt%; The consumption of gypsum is at 4.0-6.0Wt%; Grinding rate should be at 3500-4000cm
2/ g.
6. the recycling of a kind of building waste as claimed in claim 1 or 2 is characterized in that, produces No. 27.5 cement, and the consumption of building waste should be at 60.0-65.0Wt%; The consumption of cement clinker should be at 30.0-35.0Wt%; The consumption of gypsum is at 4.0-6.0Wt%; Grinding rate should be at 3000-3500cm
2/ g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101465900A CN102219405A (en) | 2010-04-15 | 2010-04-15 | Recycling of construction wastes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101465900A CN102219405A (en) | 2010-04-15 | 2010-04-15 | Recycling of construction wastes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102219405A true CN102219405A (en) | 2011-10-19 |
Family
ID=44776148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101465900A Pending CN102219405A (en) | 2010-04-15 | 2010-04-15 | Recycling of construction wastes |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910847A (en) * | 2012-11-09 | 2013-02-06 | 枣庄中联水泥有限公司 | Portland cement produced by using building rubbish as admixture and preparation process of portland cement |
| CN103304165A (en) * | 2012-03-07 | 2013-09-18 | 许名香 | Masonry ash and making method thereof |
| CN104591573A (en) * | 2015-01-28 | 2015-05-06 | 上海市建筑科学研究院 | Waste brick superfine regenerated active micro-powder and preparation method thereof |
| CN105271859A (en) * | 2014-07-24 | 2016-01-27 | 郑州三迪建筑科技有限公司 | Building rubbish treatment method |
| CN106007421A (en) * | 2016-05-23 | 2016-10-12 | 许昌金科资源再生股份有限公司 | Cement produced by virtue of waste sintered brick powder and preparation method for cement |
| CN106045355A (en) * | 2016-06-03 | 2016-10-26 | 中国葛洲坝集团水泥有限公司 | Cement produced from building waste used as mixture and production method of cement |
| CN109053107A (en) * | 2018-08-23 | 2018-12-21 | 江苏华能墙材有限公司 | A kind of building waste recycling brickmaking technology |
-
2010
- 2010-04-15 CN CN2010101465900A patent/CN102219405A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304165A (en) * | 2012-03-07 | 2013-09-18 | 许名香 | Masonry ash and making method thereof |
| CN102910847A (en) * | 2012-11-09 | 2013-02-06 | 枣庄中联水泥有限公司 | Portland cement produced by using building rubbish as admixture and preparation process of portland cement |
| CN105271859A (en) * | 2014-07-24 | 2016-01-27 | 郑州三迪建筑科技有限公司 | Building rubbish treatment method |
| CN104591573A (en) * | 2015-01-28 | 2015-05-06 | 上海市建筑科学研究院 | Waste brick superfine regenerated active micro-powder and preparation method thereof |
| CN106007421A (en) * | 2016-05-23 | 2016-10-12 | 许昌金科资源再生股份有限公司 | Cement produced by virtue of waste sintered brick powder and preparation method for cement |
| CN106045355A (en) * | 2016-06-03 | 2016-10-26 | 中国葛洲坝集团水泥有限公司 | Cement produced from building waste used as mixture and production method of cement |
| CN109053107A (en) * | 2018-08-23 | 2018-12-21 | 江苏华能墙材有限公司 | A kind of building waste recycling brickmaking technology |
| CN109053107B (en) * | 2018-08-23 | 2021-02-23 | 江苏华能墙材有限公司 | Brick making process by recycling construction waste |
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Addressee: Liu Ning Document name: Notification of Publication of the Application for Invention |
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Application publication date: 20111019 |