CN1290630C - Recovering method of waste concrete and use of recovered material - Google Patents
Recovering method of waste concrete and use of recovered material Download PDFInfo
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- CN1290630C CN1290630C CN 03124846 CN03124846A CN1290630C CN 1290630 C CN1290630 C CN 1290630C CN 03124846 CN03124846 CN 03124846 CN 03124846 A CN03124846 A CN 03124846A CN 1290630 C CN1290630 C CN 1290630C
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- waste concrete
- cement
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- bricks
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Abstract
The present invention relates to a recovery method of waste concrete. After coarse aggregate in the waste concrete is sieved or pulverized, the coarse aggregate is centralized and precipitated. Then, a water absorption device or a water absorption material is used for absorbing redundant water content in the waste concrete, and ground calcium lime powder whose weight is 0.5% of the weight of the waste concrete is added into the waste concrete to further absorb the redundant water content in the waste concrete. An amount of sand, stone powder or light aggregate is added into the mixture. After the mixture is uniformly stirred by a stirrer, the mixture is made into cement products, such as cement bricks, light cement bricks, road bricks, thermal insulating plates, cement lime mixing sand lime bricks and the like by a shaping device. The method effectively makes use of the waste concrete discharged when a stirring vehicle is cleaned, saves the water consumption used for separating cement, sand and stone, and avoids the waste of cement. The recovering and utilizing method has a novel and unique technology, and has the advantages of simple required devices and obvious economic benefit, social benefit and environmental protection benefit.
Description
Technical field
The present invention relates to the purposes of a kind of construction material recovery method and reclaimed materials, the purposes of particularly a kind of waste concrete recovery method and reclaimed materials thereof.
Background technology
Flourish along with Building Trade in China, concrete is widely used in various buildings.Equipment such as truck mixer, concrete mixing plant and concrete batching and mixing tower all need often to carry out cleaning maintenance, a large amount of waste materials that produced when producing all be to topple over as surplus mud, causes significant wastage.And, because a large amount of concrete that a variety of causes causes are scrapped, then more strengthened the difficulty of concrete mixing plant processing waste concrete.For addressing the above problem, Chinese patent CN1335209A has announced a kind of waste concrete recovering system, it is that the waste concrete of being discharged when concrete mixing plant is cleaned trucd mixer places mixing drum, the method of utilizing water to clean is separated cement with sandstone, the cement mortar of separating precipitates in sedimentation basin, and the cement mortar part of post precipitation becomes the industrial water of cement water as commerical ready-mixed concrete through stirring; The clear water of a part of classified precipitation reclaims and is used for carwash, and the sandstone of separating is also used in the production of commerical ready-mixed concrete.There is following deficiency in the recovery method of this concrete waste material:
1. cement water only as the industrial water of commerical ready-mixed concrete, fail to do cement and use, and caused the waste of cement by wherein contained cement;
2. contained cement has sucked a large amount of unnecessary moisture content in the cement water, and the production that is used for commerical ready-mixed concrete can influence the product quality of commerical ready-mixed concrete,
3. if want to reclaim clear water, just must have precipitation cement can not really handle fully.
Summary of the invention
One of purpose of the present invention is to overcome the above-mentioned deficiency of prior art and a kind of waste concrete recovery method is provided.
The technical scheme that reaches above-mentioned purpose of the present invention is: the coarse aggregate of particle diameter more than 9mm screens out or pulverizes the back and concentrate precipitation in the waste concrete that will be discharged by the agitating lorry of cleaning concrete mixing plant, get rid of clear water, be treated as the reclaimed materials that can condense and have certain intensity through suction again.
It is the fine grinding quicklime powder that need absorb a large amount of moisture content when adding an amount of aquation in waste concrete that suction is handled.
The addition of fine grinding quicklime powder is the 0.5-5% of waste concrete (weight).
Suction is handled also can adopt negative pressure suction method unnecessary moisture content in the water absorber sucking-off waste concrete.
Two of purpose of the present invention provides a kind of purposes of waste concrete reclaimed materials.
The technical scheme that reaches above-mentioned purpose of the present invention is: the waste concrete reclaimed materials is as the raw material of producing cement products such as various cement bricks, light cement brick, road brick, thermal insulation board, cement and lime combination ash sanded brick.
The present invention has scientificlly and effectively utilized the waste concrete of being discharged when cleaning trucd mixer owing to adopt as above technical scheme, has saved the water that separates cement and sandstone, has avoided the waste of cement.Reclaimed materials of the present invention can be made into cement and lime combination ash sanded brick; Also can mix an amount of sand as required, stone flour is made cement products such as various cement bricks, road brick, thermal insulation board; Also can mix an amount of lightweight aggregate as required and make various light cement bricks.The present invention reclaims and utilizes the technology of method novel unique, and equipment needed thereby is simple, and economic benefit and social benefit and environmental benefit are fairly obvious.
The specific embodiment
Embodiment 1
The first step, concrete mixing plant is cleaned the waste concrete that agitating lorry discharges is the iron sieve of 10MM by the aperture, after sifting out coarse aggregate wherein (because of coarse aggregate size excessive, be not suitable for brickmaking and other cement products, recyclable raw material) as concrete production, waste concrete is concentrated in the sedimentation basin precipitation, and (sedimentation basin need design at least two, in order to using in turn), and clear water entered clear water reserviors (the recyclable utilization of clear water is as car washing water);
Second step, with unnecessary moisture content in water absorber or the absorbent material sucking-off waste concrete, the fine grinding quicklime powder that adds waste concrete (weight) 0.5% more as required stirs, required this principle of a large amount of moisture content further absorbs the excessive moisture in the concrete when utilizing the quick lime aquation, the quick lime addition is so that no longer include unnecessary free water in the concrete, make it reach moistening loose condition (of surface), the requirement that maybe can satisfy brickmaking machine or other cement products former production technologies is as the criterion; Utilize the Ca (OH) that generates after the quick lime aquation simultaneously
2The Ca (OH) that is run off when replenishing the waste concrete bath
2, make the concrete can be at Ca (OH)
2Normal reaction in the full cyclization border;
The 3rd goes on foot, mixes as required an amount of sand, stone flour after the mixer stirring when adding fine grinding quicklime powder, make cement products such as various cement bricks, road brick, thermal insulation board by former; Also can when adding fine grinding quicklime powder, mix an amount of lightweight aggregate as required after mixer stirs, make various light cement bricks by former.
Embodiment two:
The first step, with concrete mixing plant clean coarse aggregate in the waste concrete that agitating lorry discharges pulverize the back (because of coarse aggregate size excessive, be not suitable for brickmaking and other cement products), (sedimentation basin need design at least two to concentrate on the interior precipitation of sedimentation basin, in order to using in turn), and clear water entered clear water reserviors, the recyclable utilization of clear water is as car washing water;
Second fine grinding quicklime powder that goes on foot, adds as required waste concrete (weight) 5% stirs, this principle of required a large amount of moisture content absorbs the excessive moisture in the waste concrete when utilizing the quick lime aquation, the quick lime addition is so that no longer include unnecessary free water in the concrete, make it reach moistening loose condition (of surface), the requirement that maybe can satisfy the brickmaking machine production technology is as the criterion; Utilize the Ca (OH) that generates after the quick lime aquation simultaneously
2The Ca (OH) that is run off when replenishing the waste concrete bath
2, make the concrete can be at Ca (OH)
2Normal reaction in the full cyclization border;
The 3rd goes on foot, mixes as required an amount of sand, stone flour after the mixer stirring when adding fine grinding quicklime powder, make cement and lime combination ash sanded brick by former.
The present invention produced when utilizing mixing plant to clean agitating lorry because of the too high waste concrete that can not condense of water content, handle sucking-off excessive moisture wherein through the sedimentation basin precipitation and by suction, add an amount of fine grinding quicklime powder again, the principle that needs a large amount of moisture content when utilizing the quick lime aquation, excessive moisture in the further sucking-off waste concrete, make it reach moistening loose condition (of surface), and can satisfy the requirement of production technology.Utilize its hyrate Ca (OH) simultaneously
2The Ca (OH) that is lost when replenishing the waste concrete bath
2, make the waste concrete can be at Ca (OH)
2Full cyclization border in normally carry out chemical reaction, to reduce the waste concrete ratio of mud is technical foundation, realize that waste concrete can condense and have certain intensity, finally reach the purpose of recycling, its reclaimed materials can be used as the raw material of cement products such as producing various cement bricks, light cement brick, road brick, thermal insulation board.Its method is simple and efficient to handle, and equipment is simple, and economic benefit is huge.
The present invention is through the concrete mixing plant practical application, and first month just with 100M3Waste material become 10000 yuan product; Because its equipment is simple, easy easy and simple to handle is turned waste into wealth again, so Greatly improve the economic benefit of mixing plant, and played good environment protecting. The popularization of present technique To make huge contribution for the building cause of country.
Claims (5)
1, a kind of waste concrete recovery method, the coarse aggregate of particle diameter more than 9mm screens out or pulverizes the back and concentrate precipitation in the waste concrete that it is characterized in that being discharged by the agitating lorry of cleaning concrete mixing plant, get rid of clear water, be treated as the reclaimed materials that can condense and have certain intensity through suction again.
2, waste concrete recovery method according to claim 1, it is characterized in that absorbing water, to handle be the fine grinding quicklime powder that need absorb a large amount of moisture content when adding an amount of aquation in waste concrete.
3, waste concrete recovery method according to claim 1 and 2, the addition that it is characterized in that fine grinding quicklime powder is the 0.5-5% of waste concrete weight.
4, waste concrete recovery method according to claim 1 and 2 is characterized in that absorbing water handling and also can adopt negative pressure suction method unnecessary moisture content in the water absorber sucking-off waste concrete.
5, waste concrete recovery method according to claim 3 is characterized in that absorbing water handling and also can adopt negative pressure suction method unnecessary moisture content in the water absorber sucking-off waste concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03124846 CN1290630C (en) | 2003-09-18 | 2003-09-18 | Recovering method of waste concrete and use of recovered material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03124846 CN1290630C (en) | 2003-09-18 | 2003-09-18 | Recovering method of waste concrete and use of recovered material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1526485A CN1526485A (en) | 2004-09-08 |
| CN1290630C true CN1290630C (en) | 2006-12-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03124846 Expired - Fee Related CN1290630C (en) | 2003-09-18 | 2003-09-18 | Recovering method of waste concrete and use of recovered material |
Country Status (1)
| Country | Link |
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| CN (1) | CN1290630C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332905C (en) * | 2005-03-10 | 2007-08-22 | 长江大学 | Method for producing steam-pressing silicate products by waste concrete |
| CN100391632C (en) * | 2005-07-05 | 2008-06-04 | 武汉理工大学 | Waste concrete regenerating and utilizing method |
| CN100398214C (en) * | 2006-06-01 | 2008-07-02 | 武汉理工大学 | Waste concrete component separating method |
| CN102060485B (en) * | 2010-12-02 | 2012-07-04 | 济南大学 | Cement concrete, and preparation method and recycling method thereof |
| CN110451872A (en) * | 2019-09-17 | 2019-11-15 | 中国十九冶集团有限公司 | Method for producing concrete by using waste residues of mixing plant and obtained concrete |
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2003
- 2003-09-18 CN CN 03124846 patent/CN1290630C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1526485A (en) | 2004-09-08 |
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