CN108675662A - A kind of recycled aggregate Frozen-thawed cycled preprocess method - Google Patents
A kind of recycled aggregate Frozen-thawed cycled preprocess method Download PDFInfo
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- CN108675662A CN108675662A CN201810563050.9A CN201810563050A CN108675662A CN 108675662 A CN108675662 A CN 108675662A CN 201810563050 A CN201810563050 A CN 201810563050A CN 108675662 A CN108675662 A CN 108675662A
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- aggregate
- frozen
- preprocess method
- concrete
- freeze thawing
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Classifications
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Disintegrating Or Milling (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of recycled aggregate freeze thawing to follow preprocess method, specifically includes broken level-one, removal impurity, immersion, Frozen-thawed cycled, two-stage crushing, cleaning polishing, sieves several steps.It is pre-processed by the Frozen-thawed cycled, the bulbs of pressure generated to concrete pore inner wall when being build-up ice using water make concrete generate crack from internal weakness；After ice is melted into water, water can take advantage of a situation again gos deep into inside configuration by crack.So pass through certain number Frozen-thawed cycled, the concrete that compression strength is low, internal structure is not fine and close enough generates many fine cracks in inside configuration weakness, when carrying out broken again, it is crushed at these structure cracks, formation intensity is high, hole is small, the crushing property regenerated coarse aggregate that index is big, clay content is low.
Description
Technical field
The present invention relates to recycled aggregate production application technical field, specifically a kind of recycled aggregate freeze thawing follows pretreatment side
Method.
Background technology
With the development of economy with the quickening of urban construction, more and more concrete are because reaching service life all over the world
Requirement cannot be met and be removed or rebuild.A large amount of building wastes cause some areas depletion of natural resources, water and soil a large amount of
Loss, the destruction of rivers road and natural landscape severe exacerbation etc., cause eco-environment resource form more and more severeer.
Currently, to efficiently use building waste, it is generally prepared into recycled aggregate in the world, to realize recycling profit
With.When being crushed to aggregate, aggregate mutually collides and will produce larger physical damnification conventional breakers, causes recycled aggregate
Inside generates fine cracks, so the shortcomings that recycled aggregate has itself, as water absorption is big, fine coal content is high, porosity is high, pressure
Broken index is big, density is small etc., if being applied directly in concrete, can lead to newly to mix that regeneration concrete workability is poor, hardening
After the problems such as that there are intensity is low, and durability is poor, significantly limit its application range.
Invention content
The object of the present invention is to provide a kind of recycled aggregate freeze thawing to follow preprocess method, to prepare the regeneration with high intensity
Aggregate.The recycled aggregate that preprocess method is made is followed using the freeze thawing, there is bulk density height, porosity, crushing property to refer to
The features such as absolute altitude, by a series of, freeze thawing, rolls, cleans the processing procedures such as friction, screening so that Original concrete has fallen off
Entirely, the self performance of the soft particle for removing attachment, the recycled aggregate prepared greatly improves, and can allow the recycled aggregate can
It is applied in strong concrete.
The present invention realizes that goal of the invention adopts the following technical scheme that：
Discarded concrete carries out basic handling, the impurity of simple crushing removal the inside.Discarded concrete is fully impregnated, water
It penetrates into the hole of aggregate, by Frozen-thawed cycled, the bulbs of pressure for volume expansion generation of being build-up ice using water make it along mixed
The weakness for coagulating the internal structure of soil generates crack；After ice is melted into water, water can take advantage of a situation again gos deep into inside configuration by crack.Such as
This passes through certain number Frozen-thawed cycled, and compression strength is low, and not fine and close enough the concrete of internal structure generates a lot from inside configuration
Fine cracks, when carrying out broken, formation intensity is high, hole is small, the low regenerated coarse aggregate of clay content.The place of compact structure, can
To resist the position for generating the bulbs of pressure when water build-ups ice, then crack is not will produce.
A kind of recycled aggregate freeze thawing follows preprocess method, specifically includes following steps：
1. level-one is broken：Discarded concrete is subjected to first break using gyratory crusher, grain size is made and is less than 100mm
Coarse aggregate；
2. removing impurity：By the removal of the impurity such as reinforcing bar, sawdust, cullet in discarded concrete；
3. impregnating：Deimpurity discarded concrete will be gone to impregnate in water, moisture is allowed to be fully infiltrated into inside configuration；
4. Frozen-thawed cycled：The aggregate impregnated is put into the Frozen-thawed cycled that certain number is carried out in Frozen-thawed cycled system；
5. two-stage crushing：It carries out being crushed for second in gyratory crusher；
6. cleaning polishing：In roller-type stone washing machine, aggregate is collided into rolling and is rinsed, rub aggregate surface, and removal surface is attached
Mortar, aggregate chips, soil and various loose attachments；
7. screening：Aggregate is put into progress grain size screening in sieving machine.
A kind of above-mentioned recycled aggregate freeze thawing follows preprocess method, it is characterised in that：The level-one is broken, is that aggregate is exposed
Certain surface area is destroyed to allow water penetration to enter structure hole from internal structure；It is convenient to clean simultaneously and is interspersed in bone
Part reinforcing bar inside material.
A kind of above-mentioned recycled aggregate freeze thawing follows preprocess method, it is characterised in that：The removal impurity should utilize existing
Technology, corresponding electromagnetic separation, gravitational separation device etc. be set, or is carried out using conveyer belt setting separating table artificial
Sorting.
A kind of above-mentioned recycled aggregate freeze thawing follows preprocess method, it is characterised in that：The two-stage crushing is inside concrete
When having generated crack, wear smaller gyratory crusher using to aggregate, along these aggregate structure weakness by aggregate into
Second of separation of row is broken.
A kind of above-mentioned recycled aggregate freeze thawing follows preprocess method, it is characterised in that：The roller-type stone washing machine allows stone rolling
It is rotated in cylinder, collides with each other, rubs, rolling, cooperation giant also acts certain polishing other than cleaning soil
Effect, the loose attachment of the weakness of the part mortar, outer surface that may adhere to outside aggregate is further processed.
A kind of above-mentioned recycled aggregate freeze thawing follows preprocess method, it is characterised in that：The water sedimentation of the sedimentation basin finishes it
After can be used for roller-type stone washing machine recycling.
Due to using technical solution as above, advantage to be embodied in：
1. broken compared to jaw crusher, hammer crusher for directly leaning on the external impact completion to concrete broken etc.
Machine, this kind of preprocess method can reduce the physical damnification for hitting generation strongly to aggregate.
2. inside water penetration to concrete pore, volume expansion of build-uping ice generates the bulbs of pressure, to generate crack,
Water is penetrated into along the crack to inside configuration again, and thus crack is extended, and destruction, compression strength are generated by structural weak
Low, not fine and close enough the concrete of internal structure destroys ratio more thoroughly by the Frozen-thawed cycled of certain number, is thus crushed manufactured
Recycled aggregate has the characteristics that bulk density height, porosity.
The discarded concrete that 3. internal structure is fine and close, resistance to compression is higher ranked, it is not easy to by the expansion pressure influence of water,
Thus it is high to produce crushing property index, the small recycled aggregate of bulk density.
Aggregate manufactured by 4., surface may because of the cracking due to internal void, it is broken apart after aggregate table
Face is relatively rough, and larger physical bonds intensity is formed when being easy to post-production regeneration concrete, between cement mortar and aggregate,
Improve the performance of regeneration concrete.
5. living through friction cleaning, the clay content of aggregate is low.
Specific implementation mode
The present invention is further described by the following examples.
Embodiment one
Discarded concrete is subjected to first break using gyratory crusher, the coarse aggregate that grain size is less than 100mm is made；It adopts
The impurity such as reinforcing bar, sawdust, cullet, plastics in discarded concrete are removed with electromagnetic separation, gravitational separation device；It will
It goes deimpurity discarded concrete to impregnate 4h or more in water, moisture is allowed to be fully infiltrated into inside configuration.
The aggregate impregnated is put into the Frozen-thawed cycled for carrying out certain number in Frozen-thawed cycled system, is frozen using water water-soluble
Mode, high temperature should be in (20 ± 2) DEG C or more, and low temperature (- 20 ± 2) DEG C is hereinafter, a freeze thawing is a cycle, when a cycle
Between no less than 4h；Undergo Frozen-thawed cycled 10 times.
It carries out being crushed for second in gyratory crusher, it is 31.5mm coarse aggregates below to be broken for grain size；Live through
The aggregate of second-time breakage pours into roller-type stone washing machine, and aggregate is collided rolling and is rinsed, and rub aggregate surface, and sand is adhered on removal surface
Slurry, aggregate chips, soil and various loose attachments；Aggregate is put into sieving machine and carries out grain size to be sieved into grain size being 4.75mm
The regenerated coarse aggregate of recycled fine aggregate and 4.75mm-31.5mm below.
Embodiment two
Discarded concrete is subjected to first break using gyratory crusher, the coarse aggregate that grain size is less than 100mm is made；Profit
Artificial separating table is set with conveyer belt, the impurity such as reinforcing bar, sawdust, cullet, plastics in discarded concrete are removed；It will removal
The discarded concrete of impurity impregnates 4h or more in water, and moisture is allowed to be fully infiltrated into inside configuration.
The aggregate impregnated is put into the Frozen-thawed cycled for carrying out certain number in Frozen-thawed cycled system, is frozen using gas water-soluble
Mode, high temperature should be in (20 ± 2) DEG C or more, and low temperature (- 20 ± 2) DEG C is hereinafter, a freeze thawing is a cycle, when a cycle
Between no less than 8h；After Frozen-thawed cycled reaches 10 times, carry out being crushed for the second time in gyratory crusher, being broken for grain size is
31.5mm coarse aggregate below；It lives through second of broken aggregate to pour into roller-type stone washing machine, aggregate is collided into rolling and is rinsed,
Rub aggregate surface, removal surface attachment mortar, aggregate chips, soil and various loose attachments；Aggregate is put into sieving machine
The middle grain size that carries out is sieved into the regenerated coarse aggregate that grain size is 4.75mm recycled fine aggregate below and 4.75mm-31.5mm.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.
Claims (8)
1. a kind of recycled aggregate freeze thawing follows preprocess method, which is characterized in that specifically include level-one broken, removal impurity, immersion,
Frozen-thawed cycled, cleaning polishing, sieves several steps at two-stage crushing.It is pre-processed by the Frozen-thawed cycled, when being build-up ice using water pair
The bulbs of pressure that concrete pore inner wall generates make concrete generate crack from internal weakness；After ice is melted into water, water again can be with
It takes advantage of a situation and inside configuration is goed deep by crack.So pass through certain number Frozen-thawed cycled, compression strength is low, internal structure is not fine and close enough
Concrete generate many fine cracks in inside configuration weakness, then when carrying out broken, be crushed at these structure cracks,
Formation intensity is high, hole is small, the crushing property regenerated coarse aggregate that index is big, clay content is low.
2. following preprocess method according to a kind of recycled aggregate freeze thawing described in claim 1, which is characterized in that utilize gyratory crusher
Discarded concrete is subjected to first break, the coarse aggregate that grain size is less than 100mm is made, by the exposed certain surface area of aggregate,
It is destroyed from internal structure to allow water penetration to enter structure hole, while being convenient to clean the part steel being interspersed in inside aggregate
Muscle.
3. a kind of recycled aggregate freeze thawing according to claim 1 follows preprocess method, which is characterized in that carry out broken for the first time
After broken, the impurity in building waste is removed.
4. a kind of recycled aggregate freeze thawing according to claim 1 follows preprocess method, which is characterized in that will go deimpurity
Discarded concrete impregnates in water, and moisture is allowed to be fully infiltrated into inside configuration.
5. a kind of recycled aggregate freeze thawing according to claim 1 follows preprocess method, which is characterized in that make regenerated coarse aggregate
By the pretreatment of Frozen-thawed cycled.
6. a kind of recycled aggregate freeze thawing according to claim 1 follows preprocess method, which is characterized in that experience Frozen-thawed cycled
After pretreatment, when inside concrete has generated crack, using smaller gyratory crusher is worn to aggregate, along these regeneration
It is broken that the internal fissure of aggregate carries out second of separation.
7. a kind of recycled aggregate freeze thawing according to claim 1 follows preprocess method, which is characterized in that wash stone using roller
Machine allows stone to be rotated in roller, collides with each other, rubs, rolls, and coordinates giant, other than being cleaned to aggregate, aggregate
Part mortar that outside may be adhered to, soil, outer surface the loose attachment of weakness can be further processed.
8. a kind of recycled aggregate freeze thawing according to claim 1 follows preprocess method, which is characterized in that cleaned aggregate
Screening is regenerated coarse aggregate and recycled fine aggregate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563050.9A CN108675662A (en) | 2018-06-04 | 2018-06-04 | A kind of recycled aggregate Frozen-thawed cycled preprocess method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810563050.9A CN108675662A (en) | 2018-06-04 | 2018-06-04 | A kind of recycled aggregate Frozen-thawed cycled preprocess method |
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| CN108675662A true CN108675662A (en) | 2018-10-19 |
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| CN201810563050.9A Pending CN108675662A (en) | 2018-06-04 | 2018-06-04 | A kind of recycled aggregate Frozen-thawed cycled preprocess method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109553334A (en) * | 2019-01-14 | 2019-04-02 | 江苏金海宁新型建材科技有限公司 | A kind of recycled aggregate premixing mortar and preparation method thereof |
| CN109847896A (en) * | 2018-11-23 | 2019-06-07 | 华中科技大学 | It is rapidly heated pretreated discarded graphite electrode breaking method using photo-thermal |
| CN109932386A (en) * | 2019-04-03 | 2019-06-25 | 王信青 | A kind of monitoring method of refrigerating process |
| CN111825449A (en) * | 2020-07-29 | 2020-10-27 | 雅安远创陶瓷有限责任公司 | Preparation process of zirconia ceramic block gauge |
| CN113105135A (en) * | 2021-03-25 | 2021-07-13 | 中交二公局第四工程有限公司 | Production process of cement concrete recycled aggregate |
| CN113117862A (en) * | 2021-04-12 | 2021-07-16 | 浙江大学 | Method for quickly removing mortar attached to coarse aggregate of recycled concrete |
| CN116693225A (en) * | 2023-06-02 | 2023-09-05 | 山东大学 | Method for removing weak layers of recycled aggregate old mortar |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761169A (en) * | 2015-04-27 | 2015-07-08 | 河南城建学院 | Freezing reclamation method for waste concrete |
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2018
- 2018-06-04 CN CN201810563050.9A patent/CN108675662A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104761169A (en) * | 2015-04-27 | 2015-07-08 | 河南城建学院 | Freezing reclamation method for waste concrete |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109847896A (en) * | 2018-11-23 | 2019-06-07 | 华中科技大学 | It is rapidly heated pretreated discarded graphite electrode breaking method using photo-thermal |
| CN109553334A (en) * | 2019-01-14 | 2019-04-02 | 江苏金海宁新型建材科技有限公司 | A kind of recycled aggregate premixing mortar and preparation method thereof |
| CN109932386A (en) * | 2019-04-03 | 2019-06-25 | 王信青 | A kind of monitoring method of refrigerating process |
| CN109932386B (en) * | 2019-04-03 | 2021-06-15 | 广东诺登机电工程有限公司 | Method for monitoring freezing process |
| CN111825449A (en) * | 2020-07-29 | 2020-10-27 | 雅安远创陶瓷有限责任公司 | Preparation process of zirconia ceramic block gauge |
| CN113105135A (en) * | 2021-03-25 | 2021-07-13 | 中交二公局第四工程有限公司 | Production process of cement concrete recycled aggregate |
| CN113105135B (en) * | 2021-03-25 | 2023-09-29 | 中交二公局第四工程有限公司 | Production process of cement concrete regenerated aggregate |
| CN113117862A (en) * | 2021-04-12 | 2021-07-16 | 浙江大学 | Method for quickly removing mortar attached to coarse aggregate of recycled concrete |
| CN116693225A (en) * | 2023-06-02 | 2023-09-05 | 山东大学 | Method for removing weak layers of recycled aggregate old mortar |
| CN116693225B (en) * | 2023-06-02 | 2024-04-02 | 山东大学 | Method for removing weak layers of recycled aggregate old mortar |
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