CN106186853A - A kind of preparation method of regeneration concrete - Google Patents
A kind of preparation method of regeneration concrete Download PDFInfo
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- CN106186853A CN106186853A CN201610511359.4A CN201610511359A CN106186853A CN 106186853 A CN106186853 A CN 106186853A CN 201610511359 A CN201610511359 A CN 201610511359A CN 106186853 A CN106186853 A CN 106186853A
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- concrete
- regeneration
- regeneration concrete
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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
Abstract
The invention discloses a kind of preparation relating to concrete, particularly relate to the preparation method of a kind of regeneration concrete.The preparation method of a kind of regeneration concrete, comprises the steps: a, crushes discarded concrete, is allowed to form recycled aggregate of waste concrete；B, filter out intensity be 42～55Mpa, granular size be 5～31mm recycled aggregate of waste concrete；C, as coarse aggregate prepared by the recycled aggregate of waste concrete filtered out regeneration concrete, the design strength of described regeneration concrete is 35Mpa.The present invention provides the preparation method of a kind of regeneration concrete, the preparation method of this regeneration concrete is in the case of ensureing recycled concrete strength, with intensity be 42～55Mpa, granular size be that 5～31mm recycled aggregate of waste concrete all prepare, as coarse aggregate, the regeneration concrete that design strength is 35Mpa, it is 100% that regenerative bone material by concrete replaces coarse aggregate rate.
Description
Technical field
The present invention relates to the preparation of concrete, particularly relate to the preparation method of a kind of regeneration concrete.
Background technology
The raw material of concrete includes coarse aggregate, cement, water, sand, flyash, and these raw materials pass through according to certain match ratio
Blender stirring mixing, then waters and builds up xoncrete structure, and coarse aggregate plays skeleton function in concrete, is concrete strength
Ensure.At present, coarse aggregate is usually natural rubble and two kinds of cobble.Rubble is that natural rock, cobble are through Mechanical Crushing, screening
Make, the particle diameter rock particles more than 5mm.Cobble is formed by weathering, potamic transport and sorting, accumulation, particle diameter
Rock particles more than 5mm.
Regeneration concrete is with prepared by more than 80% natural coarse aggregate in regenerated coarse aggregate replacement normal concrete
Plant concrete.Regenerated coarse aggregate is through manual sort, broken and obtain from the concrete of demolishing buildings, is taken by regenerated coarse aggregate
For natural coarse aggregate, not only process a large amount of building waste, decrease the waste of its pollution to environment and land resource, and
Rubbish is re-used Practical Project, saves natural coarse aggregate consumption.Therefore regeneration concrete is that one can efficient circulation profit
Green building product.Regeneration concrete is studied and is increasingly paid close attention to by Chinese scholars with application.
But, it is different from the characteristic of natural coarse aggregate, if regeneration aggregate is in shattering process owing to regeneration aggregate itself has
The crack of middle generation, the crush index making regeneration aggregate is low；The original old cement mortar of regeneration aggregate surface attachment, makes regeneration aggregate
Porosity higher than natural aggregate；Containing impurity such as more silt particles in regeneration aggregate.These characteristics intensity to regeneration concrete
Having adverse effect on, under identical proportioning, the intensity of regeneration concrete is generally below normal concrete, and intensity is in not
Controllable state, affects it and uses.In order to ensure the intensity of regeneration concrete, the proportioning of regenerated coarse aggregate accounts for coarse aggregate total amount proportioning
Generally 80～85%, remaining, by natural coarse aggregate, is used in mixed way production regeneration concrete.At present, in the condition of proof strength
Under, do not have a kind of whole employing regeneration aggregates to replace the regeneration concrete of natural coarse aggregate.
Summary of the invention
The technical problem to be solved is to provide the preparation method of a kind of regeneration concrete, this regeneration concrete
Preparation method is to ensure in the case of recycled concrete strength, with intensity be 42～55Mpa, granular size be 5～31mm to give up
Abandon regenerative bone material by concrete and all prepare the regeneration concrete that design strength is 35Mpa, regenerative bone material by concrete as coarse aggregate
Replacing coarse aggregate rate is 100%.
The present invention solves the preparation method of a kind of regeneration concrete that its technical problem is used, and comprises the steps:
A, discarded concrete is crushed, be allowed to form recycled aggregate of waste concrete；
B, filter out intensity be 42～55Mpa, granular size be 5～31mm recycled aggregate of waste concrete；
C, the recycled aggregate of waste concrete filtered out is prepared regeneration concrete, described regeneration concrete as coarse aggregate
Design strength be 35Mpa.
Further, in step a, by jaw crusher or hydraulic cone formula disintegrating machine, discarded concrete is entered
Row is broken.
Further, the preparation method of a kind of regeneration concrete as claimed in claim 1, in stepb, filter out strong
The recycled aggregate of waste concrete that degree is 45～52Mpa, granular size is 7～25mm.
Further, in step c, regeneration concrete is prepared and is included following flow process:
C1, according to corresponding match ratio prepare raw material, raw material includes coarse aggregate, cement, water, sand, flyash, and coarse aggregate is useless
Abandon regenerative bone material by concrete；
C2, sand and recycled aggregate of waste concrete are added in blender and stir；
C3, cement and flyash are added in blender and stirs；
C4, after mix homogeneously, add water the most while stirring in blender at sand, discarded concrete, cement, flyash,
Adding water after end, the continuation stirring 2min time forms regeneration concrete mortar；
C5, carry out regeneration concrete mortar pouring, vibrating, form regeneration concrete.
Further, in c1 flow process, the match ratio of raw material is as follows, divides according to weight ratio: discarded concrete Regenerated Bone
Material 35～40%, cement 10～14%, water 8～12%, sand 34～39%, flyash 3～5%.
Further, after c5 step, regeneration concrete is put into curing pool carries out maintenance, curing pool contain water and
The Calx being added to the water.
Further, during regeneration concrete puts into curing pool, the time of maintenance is 28～35d.
The invention has the beneficial effects as follows: select intensity be 42～55Mpa, granular size be 5～31mm discarded concretes again
Raw aggregate all prepares, as coarse aggregate, the regeneration concrete that design strength is 35Mpa, according to specification " GB/T 50081-2002
Standard for test methods of mechanical properties of ordinary concrete " sample is carried out the test of intensity, reach design, use requirement.So, adopt
By the preparation method of the regeneration concrete of the present invention, recycled aggregate of waste concrete is used to prepare design as coarse aggregate completely
Intensity is the regeneration concrete of 35Mpa, and it is 100% that regenerative bone material by concrete replaces coarse aggregate rate, uses discarded to greatest extent
Concrete, resource utilization is high, reduces the cost of concrete, also protects environment simultaneously.
Detailed description of the invention
The preparation method of a kind of regeneration concrete of the present invention, comprises the steps:
A, discarded concrete is crushed, be allowed to form recycled aggregate of waste concrete.Discarded concrete is broken to be passed through
Discarded concrete is crushed by jaw crusher or hydraulic cone formula disintegrating machine.
B, filter out intensity be 42～55Mpa, granular size be 5～31mm recycled aggregate of waste concrete；
C, the recycled aggregate of waste concrete filtered out is prepared regeneration concrete, described regeneration concrete as coarse aggregate
Design strength be 35Mpa, that is to say that the design strength of normal concrete is 35Mpa.
The quality of recycled aggregate of waste concrete, intensity are relevant with discarded concrete, and recycled aggregate of waste concrete
Quality, the height of intensity determine the height of recycled concrete strength.By drawing in substantial amounts of practice, discarded concrete regenerates
The intensity of aggregate is more in the amount of 42～55Mpa, be in 42～55Mpa recycled aggregate of waste concrete Stability Analysis of Structures,
Quality is good, is best suitable for the preparation of regeneration concrete, and the Comparision screened easily is implemented, and workload is little, and labor intensity is little.
Mention again according in People's Republic of China's industry standard " JGJ/T240-2011 regeneration aggregate application technology code "
The particle diameter of the raw aggregate granule more than 5mm, it is considered to examine stirring when, regeneration aggregate particle diameter can be made to diminish, therefore have selected
The particle diameter recycled aggregate of waste concrete more than 5mm.Coarse aggregate scope is too small, and the size of coarse aggregate can be caused to differ very
Little, granule is uniform, disproportionately graded, in order to ensure the quality of regeneration concrete, by drawing, when thick bone in lot of experiments and practice
The particle diameter of material is 5～31mm in the range of this, and the particle diameter difference making coarse aggregate is relatively big, granule uneven, makes grating reach good
Good, and the particle diameter of coarse aggregate is relatively big in 5～31mm amounts in the range of this, the Comparision of screening is easily implemented, and workload is little,
Labor intensity is little.
Wherein step c is the preparation process of regeneration concrete, and the concrete preparation flow of the present invention is as follows:
C1, according to corresponding match ratio prepare raw material, raw material includes coarse aggregate, cement, water, sand, flyash, and coarse aggregate is useless
Abandon regenerative bone material by concrete；
C2, sand and recycled aggregate of waste concrete are added in blender and stir；
C3, cement and flyash are added in blender and stirs；
C4, after mix homogeneously, add water the most while stirring in blender at sand, discarded concrete, cement, flyash,
Adding water after end, the continuation stirring 2min time forms regeneration concrete mortar；
C5, carry out regeneration concrete mortar pouring, vibrating, form regeneration concrete.
Owing to the characteristic of regenerative bone material by concrete is different from coarse aggregate (natural) characteristic, in substantial amounts of test and practice
Drawing, in c1 flow process of the present invention, the match ratio of raw material is as follows, according to weight ratio divide: recycled aggregate of waste concrete 35～
40%, cement 10～14%, water 8～12%, sand 34～39%, flyash 3～5%.
In order to improve quality and the intensity of regeneration concrete, after c5 step, put in curing pool by regeneration concrete
Row maintenance, curing pool contains water and the Calx being added to the water, and curing water becomes saturated aqua calcis, it is to avoid concrete test block
During maintenance, the calcium hydroxide dissolution that hydrated cementitious generates, cause intensity to reduce.The time of maintenance is preferably 28～35d.
Drawing through lot of experiments and practice, preparing design strength according to the preparation method of regeneration concrete of the present invention is
The regeneration concrete of 35Mpa, according to specification " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete " to sample
Product carry out the test of intensity；When recycled aggregate of waste concrete reach intensity 45～49Mpa, granular size be 7～25mm
During scope, along with the intensity of recycled aggregate of waste concrete rises, the comprcssive strength of regeneration concrete rises, regeneration concrete
Comprcssive strength, all at more than 36Mpa, all reaches the design of the regeneration concrete that design strength is 35Mpa, uses requirement；When discarded
Regenerative bone material by concrete reach intensity 49～52Mpa, granular size is when being 7～25mm scope, along with discarded concrete again
The intensity of raw aggregate rises, and the comprcssive strength of regeneration concrete declines on the contrary, but the comprcssive strength of regeneration concrete spy all exists
More than 36Mpa, so, present invention preferably employs intensity be 45～52Mpa, granular size be 7～25mm discarded concrete again
Raw aggregate, the concrete strength at preparation is all at more than 36Mpa, and intensity is high, the work of recycled aggregate of waste concrete screening simultaneously
Work amount is little.
In sum, use the preparation method of the regeneration concrete of the present invention, use recycled aggregate of waste concrete completely
Preparing, as coarse aggregate, the regeneration concrete that design strength is 35Mpa, regenerative bone material by concrete replaces coarse aggregate rate and is
100%, use discarded concrete to greatest extent, resource utilization is high, reduces the cost of concrete, also protects ring simultaneously
Border.
Embodiment 1
First pass through hydraulic cone formula disintegrating machine discarded concrete is crushed, then filter out intensity be 42Mpa,
Grain size is the recycled aggregate of waste concrete of 5～20mm；
Raw material is prepared according to table one match ratio；
Table one
According to preparation gross weight 1000kg regeneration concrete, then calculate recycled aggregate of waste concrete 350kg, cement
120kg, water 100kg, sand 390kg, flyash 40kg.
Sand and recycled aggregate of waste concrete are added in blender and stirs the 5min time, whipping process can add a small amount of
Water, continue cement and flyash are added in blender and stirred the 10min time, at sand, discarded concrete, cement, flyash
In blender after mix homogeneously, adding water the most while stirring, after the end that adds water, the continuation stirring 2min time forms regeneration coagulation
Soil mortar, carries out pouring, vibrating by prepared regeneration concrete mortar, forms regeneration concrete, is finally put into by regeneration concrete
Carrying out maintenance in curing pool, curing time is 28d.
Take sample, according to specification " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete " to sample
Carrying out the test of intensity, comprcssive strength is 35.2Mpa, reaches the design that design strength is 35Mpa of concrete, uses requirement.
Embodiment 2
First pass through hydraulic cone formula disintegrating machine discarded concrete is crushed, then filter out intensity be 45Mpa,
Grain size is the recycled aggregate of waste concrete of 7～25mm；
Raw material is prepared according to table two match ratio；
Table two
According to preparation gross weight 1000kg regeneration concrete, then calculate recycled aggregate of waste concrete 370kg, cement
110kg, water 110kg, sand 370kg, flyash 50kg.
Sand and recycled aggregate of waste concrete are added in blender and stirs the 5min time, whipping process can add a small amount of
Water, continue cement and flyash are added in blender and stirred the 10min time, at sand, discarded concrete, cement, flyash
In blender after mix homogeneously, adding water the most while stirring, after the end that adds water, the continuation stirring 2min time forms regeneration coagulation
Soil mortar, carries out pouring, vibrating by prepared regeneration concrete mortar, forms regeneration concrete, is finally put into by regeneration concrete
Carrying out maintenance in curing pool, curing time is 30d.
Take sample, according to specification " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete " to sample
Carrying out the test of intensity, comprcssive strength is 36.4Mpa, reaches the design that design strength is 35Mpa of concrete, uses requirement.
Embodiment 3
First pass through hydraulic cone formula disintegrating machine discarded concrete is crushed, then filter out intensity be 49Mpa,
Grain size is the recycled aggregate of waste concrete of 7～25mm；
Raw material is prepared according to table three match ratio；
Table three
According to preparation gross weight 1000kg regeneration concrete, then calculate recycled aggregate of waste concrete 400kg, cement
130kg, water 80kg, sand 340kg, flyash 50kg.
Sand and recycled aggregate of waste concrete are added in blender and stirs the 5min time, whipping process can add a small amount of
Water, continue cement and flyash are added in blender and stirred the 10min time, at sand, discarded concrete, cement, flyash
In blender after mix homogeneously, adding water the most while stirring, after the end that adds water, the continuation stirring 2min time forms regeneration coagulation
Soil mortar, carries out pouring, vibrating by prepared regeneration concrete mortar, forms regeneration concrete, is finally put into by regeneration concrete
Carrying out maintenance in curing pool, curing time is 35d.
Take sample, according to specification " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete " to sample
Carrying out the test of intensity, comprcssive strength is 38.4Mpa, reaches the design that design strength is 35Mpa of concrete, uses requirement.
Embodiment 4
First pass through hydraulic cone formula disintegrating machine discarded concrete is crushed, then filter out intensity be 52Mpa,
Grain size is the recycled aggregate of waste concrete of 7～25mm；
Raw material is prepared according to table four match ratio；
Table four
According to preparation gross weight 1000kg regeneration concrete, then calculate recycled aggregate of waste concrete 360kg, cement
140kg, water 90kg, sand 380kg, flyash 30kg.
Sand and recycled aggregate of waste concrete are added in blender and stirs the 5min time, whipping process can add a small amount of
Water, continue cement and flyash are added in blender and stirred the 10min time, at sand, discarded concrete, cement, flyash
In blender after mix homogeneously, adding water the most while stirring, after the end that adds water, the continuation stirring 2min time forms regeneration coagulation
Soil mortar, carries out pouring, vibrating by prepared regeneration concrete mortar, forms regeneration concrete, is finally put into by regeneration concrete
Carrying out maintenance in curing pool, curing time is 32d.
Take sample, according to specification " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete " to sample
Carrying out the test of intensity, comprcssive strength is 36.4Mpa, reaches the design that design strength is 35Mpa of concrete, uses requirement.
Embodiment 5
First pass through hydraulic cone formula disintegrating machine discarded concrete is crushed, then filter out intensity be 57Mpa,
Grain size is the recycled aggregate of waste concrete of 5～31mm；
Raw material is prepared according to table five match ratio；
Table five
According to preparation gross weight 1000kg regeneration concrete, then calculate recycled aggregate of waste concrete 400kg, cement
100kg, water 120kg, sand 380kg, flyash 40kg.
Sand and recycled aggregate of waste concrete are added in blender and stirs the 5min time, whipping process can add a small amount of
Water, continue cement and flyash are added in blender and stirred the 10min time, at sand, discarded concrete, cement, flyash
In blender after mix homogeneously, adding water the most while stirring, after the end that adds water, the continuation stirring 2min time forms regeneration coagulation
Soil mortar, carries out pouring, vibrating by prepared regeneration concrete mortar, forms regeneration concrete, is finally put into by regeneration concrete
Carrying out maintenance in curing pool, curing time is 35d.
Take sample, according to specification " GB/T 50081-2002 standard for test methods of mechanical properties of ordinary concrete " to sample
Carrying out the test of intensity, comprcssive strength is that 35.4Mpa reaches the design that design strength is 35Mpa of concrete, uses requirement.
Claims (7)
1. the preparation method of a regeneration concrete, it is characterised in that comprise the steps:
A, discarded concrete is crushed, be allowed to form recycled aggregate of waste concrete；
B, filter out intensity be 42～55Mpa, granular size be 5～31mm recycled aggregate of waste concrete；
C, the recycled aggregate of waste concrete filtered out is prepared regeneration concrete, setting of described regeneration concrete as coarse aggregate
Meter intensity is 35Mpa.
The preparation method of a kind of regeneration concrete the most as claimed in claim 1, it is characterised in that: in step a, pass through jaw
Discarded concrete is crushed by disintegrating machine or hydraulic cone formula disintegrating machine.
The preparation method of a kind of regeneration concrete the most as claimed in claim 1, it is characterised in that: in stepb, filter out strong
The recycled aggregate of waste concrete that degree is 45～52Mpa, granular size is 7～25mm.
The preparation method of a kind of regeneration concrete the most as claimed in claim 1, it is characterised in that: in step c, regeneration concrete
Prepare and include following flow process:
C1, preparing raw material according to corresponding match ratio, raw material includes coarse aggregate, cement, water, sand, flyash, and coarse aggregate is for discarded mixed
Solidifying soil regeneration aggregate；
C2, sand and recycled aggregate of waste concrete are added in blender and stir；
C3, cement and flyash are added in blender and stirs；
C4, after mix homogeneously, add water the most while stirring in blender at sand, discarded concrete, cement, flyash, add water
After end, the continuation stirring 2min time forms regeneration concrete mortar；
C5, carry out regeneration concrete mortar pouring, vibrating, form regeneration concrete.
The preparation method of a kind of regeneration concrete the most as claimed in claim 4, it is characterised in that: in c1 flow process, joining of raw material
Composition and division in a proportion is as follows, divides according to weight ratio: recycled aggregate of waste concrete 35～40%, cement 10～14%, water 8～12%, sand
34～39%, flyash 3～5%.
The preparation method of a kind of regeneration concrete the most as claimed in claim 5, it is characterised in that: after c5 step, will regeneration
Concrete is put into and is carried out maintenance in curing pool, and curing pool contains water and the Calx being added to the water.
The preparation method of a kind of regeneration concrete the most as claimed in claim 6, it is characterised in that: regeneration concrete puts into maintenance
In pond, the time of maintenance is 28～35d.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111977996A (en) * | 2020-07-18 | 2020-11-24 | 浙江方远新材料股份有限公司 | Concrete preparation process capable of recycling waste |
| CN112356269A (en) * | 2020-11-05 | 2021-02-12 | 广东基础新成混凝土有限公司 | Production process of concrete with quantitative function for preparing recycled aggregate concrete |
| CN112608079A (en) * | 2020-12-10 | 2021-04-06 | 北京京能建设集团有限公司 | Method for recycling waste concrete |
| CN114210695A (en) * | 2021-12-07 | 2022-03-22 | 漳州市诏安亿峰建筑工程材料有限公司 | Construction waste recycling process |
| CN116283114A (en) * | 2021-12-18 | 2023-06-23 | 中建七局(上海)有限公司 | Self-waterproof recycled concrete material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111977996A (en) * | 2020-07-18 | 2020-11-24 | 浙江方远新材料股份有限公司 | Concrete preparation process capable of recycling waste |
| CN112356269A (en) * | 2020-11-05 | 2021-02-12 | 广东基础新成混凝土有限公司 | Production process of concrete with quantitative function for preparing recycled aggregate concrete |
| CN112356269B (en) * | 2020-11-05 | 2022-11-22 | 广东基础新成混凝土有限公司 | Production process of concrete with quantitative function for preparing recycled aggregate concrete |
| CN112608079A (en) * | 2020-12-10 | 2021-04-06 | 北京京能建设集团有限公司 | Method for recycling waste concrete |
| CN114210695A (en) * | 2021-12-07 | 2022-03-22 | 漳州市诏安亿峰建筑工程材料有限公司 | Construction waste recycling process |
| CN116283114A (en) * | 2021-12-18 | 2023-06-23 | 中建七局(上海)有限公司 | Self-waterproof recycled concrete material and preparation method thereof |
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Application publication date: 20161207 |