CN1323974C - Bone material for controllable low-intensity back-filling material and its processing method - Google Patents
Bone material for controllable low-intensity back-filling material and its processing method Download PDFInfo
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- CN1323974C CN1323974C CNB2005100024238A CN200510002423A CN1323974C CN 1323974 C CN1323974 C CN 1323974C CN B2005100024238 A CNB2005100024238 A CN B2005100024238A CN 200510002423 A CN200510002423 A CN 200510002423A CN 1323974 C CN1323974 C CN 1323974C
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- Prior art keywords
- sand
- aggregate
- controllable low
- backfilling material
- intensity
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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
Abstract
The present invention relates to bone material for controllable low-intensity back-filling material and a processing method thereof, which relates to a processing method in which waste casting sand with specific components is used for making controllable back-filling material (CLSM) with high performance and low intensity, and the waste casting sand is prepared into the bone material mixed with the CLSM. The controllable low-intensity back-filling material comprises water, cement, fly ash and bone material, wherein the bone material is composed of one or many kinds of waste casting sand, such as furan sand, water-glass sand, wet-mold sand, ceramic shell mold sand, resin sand, etc. The waste casting sand is made into fine particle material less than 4.75mm through three specific processes of magnetic separation, sieving and breaking. The influence of uniaxial compressive strength and rheological behavior from the impurities of thick particle material, iron blocks, etc. is avoided; the CLSM with a strength range in easy control and good flowability is made.
Description
Technical field
The present invention relates to a kind of aggregate and treatment process thereof that is applied to the controllable low-intensity backfilling material, refer in particular to a kind of in the concrete composition of controllable low-intensity backfilling material as engineering backfill and road basis, with its thickness aggregate with furans sand, sodium silicate sand, wet sand, useless casting sands such as shell sand and resin sand are after specific program is handled, allocate its composition, as the aggregate that produces the controllable low-intensity backfilling material, not only can solve the environmental issue of a large amount of useless casting sands, a kind of new composition and treatment process thereof that can improve controllable low-intensity backfilling material performance can be provided again.
Background technology
Controllable low-intensity backfilling material (Controlled Low Strength Materials, CLSM) be a kind of quite new cementitious material, have from compactibility (self-compacting) with from the characteristic of levelling (self-leveling), can be widely used in excavating again on the basis as backfill and road, it has good flowability in the plastic stage, has quite easily the may command intensity of excavation again from filling and after the indurated stage, can effectively replace traditional in the past backfilling compaction material.Can't enter narrow and small engineering, trench or road surface backfills such as part for the engineering facility, or even the construction of underground works and hole etc., goodish engineering quality under the situation that does not need roll extrusion, just can be obtained.
Wherein, on the periodical that produces as the high-performance backfilling material (CLSM) in February, 2002 China Taiwan, just there are many people such as Mr. Xu Zhonglin, Mr. Pan Changlin and Mr. Zheng Ruibin that character, the proportioning of this high-performance backfilling material and producing etc. proposed penetrating research and discussion, can affirm that from its research report the application of these controllable low-intensity backfilling materials and future will point the day and await for it in future.
These controllable low-intensity backfilling materials consist of water, cement, flying dust, chemical spike and thickness aggregate etc.And aggregate wherein, workability, rheological behaviour and hard solidity matter that the use of thin aggregate or coarse aggregate and proportioning are formed for controllable low-intensity backfill material all have suitable influence.
Yet, in the composition of numerous research and controllable low-intensity backfilling material,, relegate to the category of things wanting for the research that is applied on the aggregate with useless casting sand though the workability of the consistent application of assert thick, thin aggregate and this class material of scale effect is very big.Wherein only there are Mr. Pan Changlin and Mr. Zheng Ruibin to mention slightly that in the research of delivering useless casting sand also can be aggregate, but how use and select that a kind of useless casting sand then not have further discussion and further investigation.
As everyone knows, the main component of useless casting sand is a silica sand, and according to the difference of measure of precision in the binding agent in the sand or additive or the technology or self-hardening property etc. difference, can be divided into useless wet sand, the waste water glass sand, useless Becot Set resin sand, useless phenolic aldehyde fat shell sand, useless furans sand, useless Alpha Set resin sand, the waste ceramic sand ... Deng ten several systems, the physical properties of each system is not quite similar, and generally all comprise the hearthstone that iron block and fusion process produce in the casting sand of passing into disuse, so not all useless casting sand or undressed useless casting sand can be suitable as the aggregate of described controllable low-intensity backfilling material.
From the above, still have weak point for the research and the application that utilize every useless casting sand as the composition of controllable low-intensity backfilling material at present.
Summary of the invention
The object of the present invention is to provide a kind of aggregate and treatment process thereof that is applied to the controllable low-intensity backfilling material, not only can solve the environmental issue of a large amount of useless casting sands, a kind of new composition and treatment process thereof that can improve controllable low-intensity backfilling material performance can be provided again.
Aggregate and the treatment process thereof that is applied to the controllable low-intensity backfilling material provided by the present invention, be to give up to meet the useless casting sand (furans sand) of furans system in the casting sand as the aggregate of mixing system controllable low-intensity backfilling material, the water glass system casting sand (sodium silicate sand) that gives up, the useless casting sand of wet sand system (wet sand system), shell sand system give up that the useless casting sand (resin sand) of casting sand (shell sand) and resin sand system waits several useless casting sands any one or more give magnetic separation and remove scrap iron, again through screening, after the fragmentation, make the pellet of particle diameter, as the aggregate that produces CLSM less than 4.75mm.
Particularly, the invention provides a kind of aggregate treatment process that is applied to the controllable low-intensity backfilling material, comprise the following steps:
1. sand is got in classification: the useless casting sand of difference is classified, get in the useless casting sands such as wet sand, sodium silicate sand, furans sand, ceramic case sand and resin sand one or more; Wherein, described wet sand: comprise that main component is silicon-dioxide (SiO
2) mixture such as the hearthstone that silica sand, volcanic clay, dextrin, carbon dust and fusion process produced, scrap iron; Described sodium silicate sand: comprise mixtures such as hearthstone that silica sand, sodium silicate binder and fusion process produce, scrap iron; Described furans sand: comprise mixtures such as silica sand, hearthstone that furfuralcohol binding agent and fusion process produced, scrap iron; Described ceramic case sand: main component is mixtures such as silica sand, silica gel water binding agent and scrap iron; Described resin sand: main component is mixtures such as the hearthstone that produces of silica sand, resin glue and fusion process, scrap iron;
2. magnetic separation: above-mentioned useless casting sand is removed scrap iron through magnetic separator respectively;
3. screening: the useless casting sand of magnetic separation is sieved respectively, get the following pellet of particle diameter 4.75mm;
4. mix: will sieve the following pellet of back particle diameter 4.75mm, as the mix aggregate that produces the controllable low-intensity backfilling material.
Wherein, can further send into crusher for particle diameter respectively greater than the various useless casting sand of 4.75mm does to do screening even broken once more through repeating a last flow process again after the fragmentation, the particle diameter that makes useless casting sand is all less than 4.75mm, as the mix aggregate that produces the controllable low-intensity backfilling material.
Utilize the treatment process of above-mentioned useless casting sand provided by the present invention, can obtain a kind of aggregate that is applied to the controllable low-intensity backfilling material, to replace the natural thickness aggregate of various costlinesses in the past, meet true needs, the place to go and the use of a large amount of useless casting sand are provided simultaneously, and can take into account the demand of environmental protection.
By treatment process of the present invention, can obtain a kind of good aggregate that is applied to the controllable low-intensity backfilling material, because the wherein influence of impurity such as Coarse Aggregate, iron block of having forgone, can produce the CLSM of the easy to control and more flowability of strength range to uniaxial compressive strength and rheological behaviour.The present invention makes useless casting sand become a kind of available renewable resource simultaneously, not only can reduce to use and peter out and expensive natural aggregate, and can properly dispose useless casting sand again, has the economy and the feature of environmental protection concurrently.
Embodiment
The applied aggregate of controllable low-intensity backfilling material of the present invention is the total useless casting sand that uses, and comprises in the useless casting sand of wet sand, sodium silicate sand, furans sand, ceramic case sand and five kinds of systems of resin sand one or more.
These useless casting sands are meant:
1. wet sand: comprise that main component is silicon-dioxide (SiO
2) mixture such as the hearthstone that silica sand, volcanic clay, dextrin, carbon dust and fusion process produced, scrap iron.
2. sodium silicate sand: comprise mixtures such as hearthstone that silica sand, sodium silicate binder and fusion process produce, scrap iron.
3. furans sand: comprise mixtures such as silica sand, hearthstone that furfuralcohol binding agent and fusion process produced, scrap iron.
4. ceramic case sand: main component is mixtures such as silica sand, silica gel water binding agent and scrap iron.
5. resin sand: main component is mixtures such as the hearthstone that produces of silica sand, resin glue and fusion process, scrap iron.
These useless casting sands must be handled to suitable size distribution before producing the CLSM aggregate, and good flowing property and may command strength range just can be provided, and in order to follow-up easy construction (digging property again), its treatment process is:
1. sand is got in classification: with the useless casting sand of the difference useless casting sands such as getting wet sand, sodium silicate sand, furans sand, ceramic case sand and resin sand of being classified;
2. magnetic separation: the removal that elder generation makes scrap iron through magnetic separator before screening, fragmentation of several useless casting sands of above-mentioned each system is separated, can protect the equipment of screening, fragmentation, reduce the loss of crushing mechanism, and can simplify manufacturing process and installation cost;
3. screening: the various useless casting sand of magnetic separation is sized to thin aggregate less than 4.75mm respectively;
4. broken: particle diameter is sent into crusher respectively greater than the various useless casting sand of 4.75mm and is done to do screening, fragmentation through repeating a last flow process again after the fragmentation, and the particle diameter that makes useless casting sand is all less than 4.75mm;
5. mix: the useless casting sand of obtaining through above-mentioned four steps has suitable and uniform particle diameter like this, its proportion design is any, wantonly two kinds, wantonly three kinds, wantonly four kinds or five kinds of useless casting sands of system all can be with it mix aggregates as the controllable low-intensity backfilling material, can effectively improve the flowability of this class material, be controlled at below the 4.75mm owing to particle diameter simultaneously, the required uniaxial compressive strength scope of this class material can be effectively controlled in the interference of no Coarse Aggregate and iron block.
Embodiment
Proportion design:
Sodium silicate sand system consumption (kg) 11
Furans sand system consumption (kg) 11
Wet sand system consumption (kg) 22
CLSM sand-cement slurry character:
Unit weight (kg/M
3) 929
Air content (%) 0.8
Degree of collapsing (cm) 28
Mobility (cm) 72
Revise mobility (cm) 26
1 day (kg/cm of ultimate compression strength
2) 10.7
7 days (kg/cm of ultimate compression strength
2) 26.9
28 days (kg/cm of ultimate compression strength
2) 48.1
To give up casting sand through the mix aggregate of special process recycling as CLSM by processing method of the present invention, produce CLSM with the natural thickness aggregate of use and compare, have following advantages:
1, the spirit that meets the waste resource regeneration.
2, reduce natural aggregate use amount, reduce manufacturing cost, improve the competitiveness of product in market.
3, compression strength scope ratio is easier to control (interference of the coarse aggregate of forgoing).
4, provide better flowing property.
5, need not wash, the pre-treatment cost is low, can effectively the casting sand that gives up be processed into the mix aggregate of CLSM.
6, improve castoff regenerative product surcharge.
Claims (9)
1, a kind of aggregate treatment process that is applied to the controllable low-intensity backfilling material comprises the following steps:
1. sand is got in classification:
The useless casting sand of difference is classified, got one or more of wet sand, sodium silicate sand, furans sand, ceramic case sand and resin sand, wherein,
Described wet sand comprises the hearthstone that silica sand, volcanic clay, dextrin, carbon dust and fusion process produced, the scrap iron mixture that contains silicon-dioxide;
Described sodium silicate sand comprises hearthstone, the scrap iron mixture that silica sand, sodium silicate binder and fusion process produce;
Described furans sand comprises hearthstone, the scrap iron mixture that silica sand, furfuralcohol binding agent and fusion process are produced;
Described ceramic case sand comprises silica sand, silica gel water binding agent and scrap iron mixture;
Described resin sand comprises hearthstone, the scrap iron mixture that silica sand, resin glue and fusion process produce;
2. magnetic separation:
Above-mentioned useless casting sand is removed scrap iron through magnetic separator respectively;
3. screening:
The useless casting sand of magnetic separation is sieved respectively, get the following pellet of particle diameter 4.75mm;
4. mix:
With the pellet below the particle diameter 4.75mm of screening back, as the mix aggregate that produces the controllable low-intensity backfilling material.
2, a kind of aggregate treatment process that is applied to the controllable low-intensity backfilling material comprises the following steps:
1. sand is got in classification:
The useless casting sand of difference is classified, got in wet sand, sodium silicate sand, furans sand, ceramic case sand and the resin sand one or more, wherein,
Described wet sand comprises the hearthstone that silica sand, volcanic clay, dextrin, carbon dust and fusion process produced, the scrap iron mixture that contains silicon-dioxide;
Described sodium silicate sand comprises hearthstone, the scrap iron mixture that silica sand, sodium silicate binder and fusion process produce;
Described furans sand comprises hearthstone, the scrap iron mixture that silica sand, furfuralcohol binding agent and fusion process are produced;
Described ceramic case sand comprises silica sand, silica gel water binding agent and scrap iron mixture;
Described resin sand comprises hearthstone, the scrap iron mixture that silica sand, resin glue and fusion process produce;
2. magnetic separation:
Above-mentioned useless casting sand is removed scrap iron through magnetic separator respectively;
3. screening:
The useless casting sand of magnetic separation is sieved, got the following pellet of particle diameter 4.75mm;
4. broken:
Particle diameter is sent into crusher in crushing respectively greater than the useless casting sand of 4.75mm, again through the screening, until the aggregate particle diameter less than 4.75mm;
5. mix:
With the pellet below the particle diameter 4.75mm of screening back, as the mix aggregate that produces the controllable low-intensity backfilling material.
3, the aggregate treatment process that is applied to the controllable low-intensity backfilling material as claimed in claim 1 or 2, wherein, described controllable low-intensity backfilling material is made up of water, cement, flying dust and aggregate.
4, the aggregate treatment process that is applied to the controllable low-intensity backfilling material as claimed in claim 1 or 2, wherein, described controllable low-intensity backfilling material is made up of water, cement, flying dust and aggregate, and described aggregate is wantonly two kinds in wet sand, sodium silicate sand, furans sand, ceramic case sand, the useless casting sand of resin sand.
5, the aggregate treatment process that is applied to the controllable low-intensity backfilling material as claimed in claim 1 or 2, wherein, described controllable low-intensity backfilling material is made up of water, cement, flying dust and aggregate, and described aggregate is wantonly three kinds in wet sand, sodium silicate sand, furans sand, ceramic case sand, the useless casting sand of resin sand.
6, the aggregate treatment process that is applied to the controllable low-intensity backfilling material as claimed in claim 1 or 2, wherein, described controllable low-intensity backfilling material is made up of water, cement, flying dust and aggregate, and described aggregate is wantonly four kinds in wet sand, sodium silicate sand, furans sand, ceramic case sand, the useless casting sand of resin sand.
7, the aggregate treatment process that is applied to the controllable low-intensity backfilling material as claimed in claim 1 or 2, wherein, described controllable low-intensity backfilling material is made up of water, cement, flying dust and aggregate, and described aggregate is wet sand, sodium silicate sand, furans sand, ceramic case sand and five kinds of useless casting sands of resin sand.
8, utilize the method for claim 1 to handle the aggregate that is applied to the controllable low-intensity backfilling material that obtains.
9, utilize the method for claim 2 to handle the aggregate that is applied to the controllable low-intensity backfilling material that obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100024238A CN1323974C (en) | 2005-01-20 | 2005-01-20 | Bone material for controllable low-intensity back-filling material and its processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100024238A CN1323974C (en) | 2005-01-20 | 2005-01-20 | Bone material for controllable low-intensity back-filling material and its processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1807329A CN1807329A (en) | 2006-07-26 |
| CN1323974C true CN1323974C (en) | 2007-07-04 |
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| CNB2005100024238A Expired - Fee Related CN1323974C (en) | 2005-01-20 | 2005-01-20 | Bone material for controllable low-intensity back-filling material and its processing method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780522A (en) * | 2010-03-05 | 2010-07-21 | 昆明理工大学 | Method for magnetic separation and regeneration of molding clay-resin mixed used sand |
| CN101912946A (en) * | 2010-07-01 | 2010-12-15 | 刘昆湘 | JDY material casting sand core |
| CN108203270A (en) * | 2018-01-04 | 2018-06-26 | 北京建筑大学 | A kind of controllability low-intensity material |
| CN113354365A (en) * | 2021-07-12 | 2021-09-07 | 中电建十一局工程有限公司 | New material for backfilling table back of structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252781A (en) * | 1997-04-24 | 2000-05-10 | 圣杰瑞克国际有限公司 | High pulp density, fast setting and high early strength backfill method and material |
| CN1712379A (en) * | 2004-06-25 | 2005-12-28 | 中南大学 | Method and system for treating high sulfur contained tails as binding filler aggregates |
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2005
- 2005-01-20 CN CNB2005100024238A patent/CN1323974C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252781A (en) * | 1997-04-24 | 2000-05-10 | 圣杰瑞克国际有限公司 | High pulp density, fast setting and high early strength backfill method and material |
| CN1712379A (en) * | 2004-06-25 | 2005-12-28 | 中南大学 | Method and system for treating high sulfur contained tails as binding filler aggregates |
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| CN1807329A (en) | 2006-07-26 |
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Granted publication date: 20070704 Termination date: 20140120 |