CN106277960A - C30 concrete based on regeneration aggregate and preparation method thereof - Google Patents
C30 concrete based on regeneration aggregate and preparation method thereof Download PDFInfo
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- CN106277960A CN106277960A CN201610597092.5A CN201610597092A CN106277960A CN 106277960 A CN106277960 A CN 106277960A CN 201610597092 A CN201610597092 A CN 201610597092A CN 106277960 A CN106277960 A CN 106277960A
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- aggregate
- concrete
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- seconds
- coarse aggregate
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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
- 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
-
- 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 discloses a kind of C30 concrete based on regeneration aggregate and preparation method thereof.The component of concrete and weight/mass percentage composition be: water 7～9, cement 12～14, regeneration aggregate pulverized powder 1～3, recycled fine aggregate 13～16, regenerated coarse aggregate 44～48, natural sand 13～16.Method includes: (20) coarse aggregate pretreatment: add whole regenerated coarse aggregate in agitating device, and water spray makes surface wettability, is limited occurring without water droplet flowing, stirs 30 seconds；(30) batch mixings: add cement, regeneration aggregate pulverized powder, the water of half consumption in agitating device, stir 40 seconds；(40) rerolling: add recycled fine aggregate, natural sand, the water of residue consumption in agitating device, stir 3 minutes；(50) concrete is produced: poured out by mixture, through molding, maintenance, i.e. obtains required C30 concrete.The concrete of the present invention, natural material consumption is few, and production cost is low, and environmental pollution is little.
Description
Technical field
The invention belongs to concrete material technical field, particularly a kind of natural material consumption is few, and production cost is low, environment
Pollute little C30 concrete based on regeneration aggregate and preparation method thereof.
Background technology
China is the resources consumption big country of a shortage of resources, and the quality of life of economic growth rate and people is increasingly subject to
To resource and the constraint of environment.Along with country's building trade progress faster, exploitation and the processing of construction material accelerate again ecology
The destruction of environment, therefore exploitation sandstone aggregate and the resource exhaustion that causes and ecological problem, it has also become focus of concern.
Can produce greatly along with the quickening of urbanization process, inhering architecture and cement concrete road are removed in broken engineering
The discarded concrete of amount, not only causes certain pollution, also creates the waste of resource environment.
Therefore, prior art there is the problem that on the one hand concrete production consumes a large amount of natural sandstone aggregates, the opposing party
Face demolishing buildings process produces again a large amount of discarded concrete, pollutes environment.
Summary of the invention
It is an object of the invention to provide a kind of C30 concrete based on regeneration aggregate, natural material consumption is few, produces into
This is low, and environmental pollution is little.
Another object of the present invention is to provide the preparation method of a kind of C30 concrete based on regeneration aggregate,
The technical solution realizing the object of the invention is:
A kind of C30 concrete based on regeneration aggregate, its component and weight/mass percentage composition be:
Water 7～9,
Cement 12～14,
Regeneration aggregate pulverized powder 1～3,
Recycled fine aggregate 13～16,
Regenerated coarse aggregate 44～46,
Natural sand 13～16.
Preferably, described regenerated coarse aggregate by discarded concrete through the particle diameter that broken, screening obtain be 5～15mm and 15～
Two kinds of aggregate 4:3 in mass ratio of 31mm mix.
Further preferably, the crush values of described regenerated coarse aggregate is 16%, and apparent density is 2670g/cm3, mortar adheres to
Rate is 9%, and elongated particles is 8%, and water absorption rate is 3.3%.
Preferably, the aggregate that particle diameter is 0～5mm that described recycled fine aggregate is obtained through broken, screening by discarded concrete
Form.
Further preferably, the modulus of fineness of described recycled fine aggregate is 3.3.
Preferably, described regeneration aggregate pulverized powder by recycled fine aggregate through steel ball lapping machine grind 1.5～2.0 hours and
, fineness is between 200 mesh and 300 mesh, and the particle diameter that described recycled fine aggregate is obtained through broken, screening by discarded concrete is
The aggregate of 0～5mm forms.
The technical scheme realizing another object of the present invention is:
The preparation method of C30 concrete based on regeneration aggregate, comprises the steps:
(20) coarse aggregate pretreatment: add the regenerated coarse aggregate of whole consumption in agitating device, makes with watering can water spray again
Raw coarse aggregate surface wettability, is limited occurring without water droplet flowing, stirs 30 seconds；
(30) batch mixings: add cement, regeneration aggregate pulverized powder, the water of half consumption in agitating device, stir 40
Second；
(40) rerolling: add recycled fine aggregate, natural sand, the water of residue consumption in agitating device, stir 3 points
Clock；
(50) concrete is produced: poured out by mixture, through molding, maintenance, i.e. obtains required C30 concrete.
Preferably, before described (20) coarse aggregate pre-treatment step, also include that (10) regenerated coarse aggregate strengthens step, with
Strengthened regenerated coarse aggregate.
Specifically, described (10) regenerated coarse aggregate strengthening step includes:
(11) by discarded concrete through broken, screening, obtain particle diameter and be respectively two kinds of regeneration of 5～15mm and 15～31mm
Aggregate；
(12) take the regeneration aggregate 3 parts that particle diameter is 15～31mm, stir 30～50 seconds by forced mixer positive direction, then
Opposite direction stirs 30～50 seconds；
(13) taking the regeneration aggregate 4 parts that particle diameter is 5～15mm, add aforementioned forced mixer center, positive direction stirs
40～60 seconds, then opposite direction stir 40～60 seconds, discharging i.e. obtains intensifying regenerating coarse aggregate.
Compared with prior art, its remarkable advantage is the present invention:
1, natural material consumption is few: present invention regenerated coarse aggregate 100% replacement natural coarse aggregate, uses recycled fine aggregate
50% replacement natural sand, replaces part of cement with regeneration aggregate pulverized powder, and gained regeneration concrete indices all can meet to be wanted
Asking, the use of natural sandstone aggregate is greatly reduced, the exhausted problem with ecological degeneration in the source that alleviates, production cost is low；
2, environmental pollution is little: the present invention makes full use of inhering architecture or concrete road is removed in broken engineering and can be produced
A large amount of discarded concretes, on the one hand reduce material construction, on the other hand decrease throwing aside to environment of discarded concrete
Pollute.
The present invention is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the flow chart of the preparation method of present invention C30 based on regeneration aggregate concrete.
Detailed description of the invention
The embodiment that embodiment 1 to 4 is strengthened for regenerated coarse aggregate, for embodiment 5-8.
Embodiment 1
(1) the discarded concrete jaw in building castoff and impact breaker being crushed, screening obtains grain
Footpath scope is 5～15mm and 15～31mm two kind of regeneration aggregate, and carries out feeding respectively according to the ratio of 4:3；
(2) take 3 part 15～the regenerated coarse aggregate of 31mm particle size range, utilize forced mixer, carry out positive direction stirring
30 seconds, then carry out opposite direction and stir 30 seconds；
(3) take 4 part 5～the regenerated coarse aggregate of 15mm particle size range, add forced mixer, carry out positive direction stirring 40
Second, then carry out opposite direction and stir 40 seconds；
(4) discharging strengthening after regenerated coarse aggregate.
Wherein before strengthening, after being mixed according to the ratio of mass ratio 4:3 by the aggregate of two kinds of particle diameters, survey its crush values and mortar
Adhesive rate；Regeneration aggregate after strengthening is surveyed its crush values and mortar adhesive rate, result such as table 1 below.
| Project | Crush values (%) | Mortar adhesive rate (%) |
| Before strengthening | 30 | 38 |
| After strengthening | 18 | 20 |
Embodiment 2
(1) the discarded concrete jaw in building castoff and impact breaker being crushed, screening obtains grain
Footpath scope is 5～15mm and 15～31mm two kind of regeneration aggregate, and carries out feeding respectively according to the ratio of 4:3；
(2) take 3 part 15～the regenerated coarse aggregate of 31mm particle size range, utilize forced mixer, carry out positive direction stirring
50 seconds, then carry out opposite direction and stir 50 seconds；
(3) take 4 part 5～the regenerated coarse aggregate of 15mm particle size range, add forced mixer, carry out positive direction stirring 60
Second, then carry out opposite direction and stir 60 seconds；
(4) discharging strengthening after regenerated coarse aggregate.
Wherein before strengthening, after being mixed according to the ratio of mass ratio 4:3 by the aggregate of two kinds of particle diameters, survey its crush values and mortar
Adhesive rate；Regeneration aggregate after strengthening is surveyed its crush values and mortar adhesive rate, result such as table 1 below.
| Project | Crush values (%) | Mortar adhesive rate (%) |
| Before strengthening | 30 | 38 |
| After strengthening | 12 | 15 |
Embodiment 3
(1) the discarded concrete jaw in building castoff and impact breaker being crushed, screening obtains grain
Footpath scope is 5～15mm and 15～31mm two kind of regeneration aggregate, and carries out feeding respectively according to the ratio of 4:3；
(2) take 3 part 15～the regenerated coarse aggregate of 31mm particle size range, poured into forced mixer, carry out positive direction
Stir 40 seconds, then carry out opposite direction and stir 40 seconds；
(3) take 4 part 5～the regenerated coarse aggregate of 15mm particle size range, poured into forced mixer, carry out positive direction and stir
Mix 40 seconds, then carry out opposite direction and stir 40 seconds；
(4) discharging strengthening after regenerated coarse aggregate.
Wherein before strengthening, after being mixed according to the ratio of mass ratio 4:3 by the aggregate of two kinds of particle diameters, survey its crush values and mortar
Adhesive rate；Regeneration aggregate after strengthening is surveyed its crush values and mortar adhesive rate, result such as table 1 below.
| Project | Crush values (%) | Mortar adhesive rate (%) |
| Before strengthening | 27 | 36 |
| After strengthening | 16 | 20 |
Embodiment 4
(1) the discarded concrete jaw in building castoff and impact breaker being crushed, screening obtains grain
Footpath scope is 5～15mm and 15～31mm two kind of regeneration aggregate, and carries out feeding respectively according to the ratio of 4:3；
(2) take 3 part 15～the regenerated coarse aggregate of 31mm particle size range, utilize forced mixer, carry out positive direction stirring
40 seconds, then carry out opposite direction and stir 40 seconds；
(3) take 4 part 5～the regenerated coarse aggregate of 15mm particle size range, add forced mixer, carry out positive direction stirring 40
Second, then carry out opposite direction and stir 40 seconds；
(4) discharging strengthening after regenerated coarse aggregate.
Wherein before strengthening, after being mixed according to the ratio of mass ratio 4:3 by the aggregate of two kinds of particle diameters, survey its crush values and mortar
Adhesive rate；Regeneration aggregate after strengthening is surveyed its crush values and mortar adhesive rate, result such as table 1 below.
| Project | Crush values (%) | Mortar adhesive rate (%) |
| Before strengthening | 30 | 38 |
| After strengthening | 15 | 18 |
By above 4 embodiments it can be seen that a kind of regenerated coarse aggregate intensifying method based on action of forced stirring of the present invention
Crush values and the mortar adhesive rate that can make regenerated coarse aggregate are greatly lowered, and reach to strengthen the purpose of regenerated coarse aggregate.
Embodiment 5
C30 regeneration concrete each constituent mass percentage ratio is: water 7%, cement 12%, regeneration aggregate pulverized powder 3%, regeneration
Coarse aggregate 46%, recycled fine aggregate 16%, natural sand 16%.
Using foregoing preparation process, existing details are as follows:
First, regenerated coarse aggregate is carried out pretreatment, agitating device adds whole regenerated coarse aggregates, and uses watering can
Water spray makes regenerated coarse aggregate surface wettability, but the phenomenon that water droplet flows can not occurs, and is stirred 30 seconds；
Secondly, cement, regeneration aggregate pulverized powder, the water of half consumption, uniform stirring 40 seconds are added；
Finally, recycled fine aggregate, natural sand, remaining water being added agitating device and stirs 3 minutes, mixture passes through into
Type, maintenance can get C30 regeneration concrete, record its mechanical property and are: 7 days mean compressive strengths 22.7MPa, and 28 days the most anti-
Compressive Strength 32.9MPa.
Embodiment 6
C30 regeneration concrete each constituent mass percentage ratio is: water 9%, cement 14%, regeneration aggregate pulverized powder 3%, regeneration
Coarse aggregate 48%, recycled fine aggregate 13%, natural sand 13%.
Specifically comprising the following steps that of the preparation method of C30 regeneration concrete prepared by a kind of regeneration aggregate of the present invention
First, regenerated coarse aggregate is carried out pretreatment, agitating device adds whole regenerated coarse aggregates, and uses watering can
Water spray makes regenerated coarse aggregate surface wettability, but the phenomenon that water droplet flows can not occurs, and is stirred 30 seconds；
Secondly, cement, regeneration aggregate pulverized powder, the water of half consumption, uniform stirring 40 seconds are added；
Finally, recycled fine aggregate, natural sand, remaining water being added agitating device and stirs 3 minutes, mixture passes through into
Type, maintenance can get C30 regeneration concrete, record its mechanical property and are: 7 days mean compressive strengths 19.7MPa, and 28 days the most anti-
Compressive Strength 30.5MPa.
Embodiment 7
C30 regeneration concrete each constituent mass percentage ratio is: water 7%, cement 12%, regeneration aggregate pulverized powder 1%, regeneration
Coarse aggregate 44%, recycled fine aggregate 14%, natural sand 14%.
Specifically comprising the following steps that of the preparation method of C30 regeneration concrete prepared by a kind of regeneration aggregate of the present invention
First, regenerated coarse aggregate is carried out pretreatment, agitating device adds whole regenerated coarse aggregates, and uses watering can
Water spray makes regenerated coarse aggregate surface wettability, but the phenomenon that water droplet flows can not occurs, and is stirred 30 seconds；
Secondly, cement, regeneration aggregate pulverized powder, the water of half consumption, uniform stirring 40 seconds are added；
Finally, recycled fine aggregate, natural sand, remaining water being added agitating device and stirs 3 minutes, mixture passes through into
Type, maintenance can get C30 regeneration concrete, record its mechanical property and are: 7 days mean compressive strengths 18.6MPa, and 28 days the most anti-
Compressive Strength 30.9MPa.
Case study on implementation 8
C30 regeneration concrete each constituent mass percentage ratio is: water 8%, cement 14%, regeneration aggregate pulverized powder 3%, regeneration
Coarse aggregate 45%, recycled fine aggregate 15%, natural sand 15%.
Specifically comprising the following steps that of the preparation method of C30 regeneration concrete prepared by a kind of regeneration aggregate of the present invention
First, regenerated coarse aggregate is carried out pretreatment, agitating device adds whole regenerated coarse aggregates, and uses watering can
Water spray makes regenerated coarse aggregate surface wettability, but the phenomenon that water droplet flows can not occurs, and is stirred 30 seconds；
Secondly, cement, regeneration aggregate pulverized powder, the water of half consumption, uniform stirring 40 seconds are added；
Finally, recycled fine aggregate, natural sand, remaining water being added agitating device and stirs 3 minutes, mixture passes through into
Type, maintenance can get C30 regeneration concrete, record its mechanical property and are: 7 days mean compressive strengths 20.9MPa, and 28 days the most anti-
Compressive Strength 32.0MPa.
By above 8 embodiments it can be seen that the present invention is by the different grains crushed by discarded concrete, screening obtains
The regeneration aggregate in footpath replaces natural aggregate, and regeneration aggregate pulverized powder replaces cement, adds water, cement and natural sand etc. according to necessarily
Regeneration concrete prepared by ratio, is possible not only to make the indices of the regeneration concrete of preparation all can meet requirement, the most real
The now resource recycling to building castoff.
Claims (9)
1. a C30 concrete based on regeneration aggregate, it is characterised in that its component and weight/mass percentage composition be:
Water 7～9,
Cement 12～14,
Regeneration aggregate pulverized powder 1～3,
Recycled fine aggregate 13～16,
Regenerated coarse aggregate 44～48,
Natural sand 13～16.
Concrete the most according to claim 1, it is characterised in that: described regenerated coarse aggregate by discarded concrete through broken,
Two kinds of aggregate 4:3 in mass ratio that particle diameter is 5～15mm and 15～31mm that screening obtains mix.
Concrete the most according to claim 2, it is characterised in that: the crush values of described regenerated coarse aggregate is 16%, apparent
Density is 2670g/cm3, mortar adhesive rate is 9%, and elongated particles is 8%, and water absorption rate is 3.3%.
Concrete the most according to claim 1, it is characterised in that: described recycled fine aggregate by discarded concrete through broken,
The aggregate that particle diameter is 0～5mm that screening obtains forms.
Concrete the most according to claim 4, it is characterised in that: the modulus of fineness of described recycled fine aggregate is 3.3.
Concrete the most according to claim 1, it is characterised in that: described regeneration aggregate pulverized powder by recycled fine aggregate through steel
Ball grinder grinds 1.5～2.0 hours and obtains, and fineness is between 200 mesh and 300 mesh, and described recycled fine aggregate is mixed by discarding
The aggregate that particle diameter is 0～5mm that solidifying soil obtains through broken, screening forms.
7. a preparation method for the C30 concrete based on regeneration aggregate as described in one of claim 1 to 6, its feature exists
In, comprise the steps:
(20) coarse aggregate pretreatment: add the regenerated coarse aggregate of whole consumption in agitating device, makes regeneration thick with watering can water spray
Aggregate surface moisten, with occur without water droplet flowing be limited, stir 30 seconds；
(30) batch mixings: add cement, regeneration aggregate pulverized powder, the water of half consumption in agitating device, stir 40 seconds；
(40) rerolling: add recycled fine aggregate, natural sand, the water of residue consumption in agitating device, stir 3 minutes；
(50) concrete is produced: poured out by mixture, through molding, maintenance, i.e. obtains required C30 concrete.
The preparation method of concrete the most according to claim 7, it is characterised in that: walk in described (20) coarse aggregate pretreatment
Before Zhou, also include that (10) regenerated coarse aggregate strengthens step, with the regenerated coarse aggregate that strengthened.
The preparation method of concrete the most according to claim 8, it is characterised in that described (10) regenerated coarse aggregate strengthening step
Suddenly include:
(11) by discarded concrete through broken, screening, obtain particle diameter and be respectively two kinds of Regenerated Bones of 5～15mm and 15～31mm
Material；
(12) take the regeneration aggregate 3 parts that particle diameter is 15～31mm, stir 30～50 seconds by forced mixer positive direction, then negative side
To stirring 30～50 seconds；
(13) take the regeneration aggregate 4 parts that particle diameter is 5～15mm, add aforementioned forced mixer center, positive direction stirring 40～
60 seconds, then opposite direction stir 40～60 seconds, discharging i.e. obtains intensifying regenerating coarse aggregate.
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| CN108585756A (en) * | 2018-07-17 | 2018-09-28 | 南昌工程学院 | A kind of magnesium oxysulfide concrete regenerated aggregate concrete and preparation method thereof |
| CN111051850A (en) * | 2017-08-25 | 2020-04-21 | 福田金属箔粉工业株式会社 | Method for evaluating powder for laminate molding and powder for laminate molding |
| CN111794046A (en) * | 2020-06-11 | 2020-10-20 | 福建省铁拓机械股份有限公司 | Stepped stirring method for asphalt mixture |
| WO2022183662A1 (en) * | 2021-03-01 | 2022-09-09 | 青岛农业大学 | Ecological artificial reef concrete using multiple solid wastes and preparation method therefor |
| CN115353345A (en) * | 2022-08-15 | 2022-11-18 | 吉林大学 | Recycled aggregate cement concrete and preparation method thereof |
| CN115401789A (en) * | 2022-09-02 | 2022-11-29 | 中铁三局集团有限公司 | Concrete stirring production method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107445543A (en) * | 2017-08-03 | 2017-12-08 | 河北建筑工程学院 | A kind of iron tailings regeneration concrete and preparation method thereof |
| CN111051850A (en) * | 2017-08-25 | 2020-04-21 | 福田金属箔粉工业株式会社 | Method for evaluating powder for laminate molding and powder for laminate molding |
| CN111051850B (en) * | 2017-08-25 | 2022-07-08 | 福田金属箔粉工业株式会社 | Method for evaluating powder for laminate molding and powder for laminate molding |
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| CN108585756A (en) * | 2018-07-17 | 2018-09-28 | 南昌工程学院 | A kind of magnesium oxysulfide concrete regenerated aggregate concrete and preparation method thereof |
| CN111794046A (en) * | 2020-06-11 | 2020-10-20 | 福建省铁拓机械股份有限公司 | Stepped stirring method for asphalt mixture |
| WO2022183662A1 (en) * | 2021-03-01 | 2022-09-09 | 青岛农业大学 | Ecological artificial reef concrete using multiple solid wastes and preparation method therefor |
| CN115353345A (en) * | 2022-08-15 | 2022-11-18 | 吉林大学 | Recycled aggregate cement concrete and preparation method thereof |
| CN115401789A (en) * | 2022-09-02 | 2022-11-29 | 中铁三局集团有限公司 | Concrete stirring production method |
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Application publication date: 20170104 |