CN106186945A - A kind of regeneration concrete and preparation method thereof - Google Patents
A kind of regeneration concrete and preparation method thereof Download PDFInfo
- Publication number
- CN106186945A CN106186945A CN201610554215.7A CN201610554215A CN106186945A CN 106186945 A CN106186945 A CN 106186945A CN 201610554215 A CN201610554215 A CN 201610554215A CN 106186945 A CN106186945 A CN 106186945A
- Authority
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- China
- Prior art keywords
- concrete
- regeneration concrete
- cement
- coarse aggregate
- silica flour
- Prior art date
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- 239000004567 concrete Substances 0.000 title claims abstract description 63
- 230000008929 regeneration Effects 0.000 title claims abstract description 31
- 238000011069 regeneration method Methods 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound 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- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials 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[Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
- C04B28/02—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 containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
Open a kind of regeneration concrete of the present invention and preparation method thereof, by including that cement, water, fine aggregate, regenerated coarse aggregate, silica flour, steel fibre, rubber grain, the raw material of water reducer prepare, described regenerated coarse aggregate, steel fibre are (2.80～3.00) with the mass ratio of rubber grain: (0.20～0.25): (0.05～0.20).The regeneration concrete of the present invention, by including that regenerated coarse aggregate, rubber grain, steel fibre, the component of silica flour prepare, improves the mechanical property of regeneration concrete while realizing Reuse of Throwaway Material, has good application prospect.
Description
Technical field
The invention belongs to New Building Materials technical field, relate to a kind of regeneration concrete and preparation method thereof.
Technical background
Recycled concrete is by after discarded concrete crushing washing classification, is mixed to form regeneration according to a certain percentage thick
Aggregate, partly or entirely replaces the technology of natural aggregate concrete batching.This technology can solve discarded concrete occupation of land and
The problem processed, reduces and pollutes and save the energy.But, regenerated coarse aggregate also exists some defect, as shattering process causes
Damage, bigger porosity, remain cement based, relatively high water absorbing capacity etc..Due to these defects, regenerated coarse aggregate is used for laying more
The non-structural fields such as the bed course of road and making greening brick, limit its application channel.
Rubber, silica flour and steel fibre be energy co-ordination in concrete substrate, forms confounding effect, and common improvement regeneration mixes
Solidifying soil nature energy so that it is there is outstanding resistance to compression, bending performance, it is adaptable to current all kinds of concrete workses.Rubber steel fiber reinforced siliceous concrete
It is extensive that regenerated coarse aggregate concrete not only has material source, moreover it is possible to expands the range of application of regenerated coarse aggregate, improves resource
Recycle efficiency, reduce problem of environmental pollution.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the present invention provides a kind of regeneration concrete and preparation method thereof, the present invention's
Regeneration concrete, by including that regenerated coarse aggregate, rubber grain, steel fibre, the raw material of silica flour prepare, is realizing to obsolete material again
Improve the mechanical property of regeneration concrete while utilization, there is good application prospect.
The purpose of the present invention is achieved through the following technical solutions:
A kind of regeneration concrete, by include cement, water, fine aggregate, regenerated coarse aggregate, silica flour, steel fibre, rubber grain,
Prepared by the raw material of water reducer, described regenerated coarse aggregate, steel fibre are (2.80～3.00) with the mass ratio of rubber grain: (0.20
～0.25): (0.05～0.20).
Preferably, described cement, silica flour are 1.00:(0.05～0.15 with the mass ratio of water): (0.50～0.55).
Preferably, described cement is 1.00:(2.80～3.00 with the mass ratio of regenerated coarse aggregate).Preferably, described again
Raw coarse aggregate is by particle diameter 5～10mm and the aggregate of 10～20mm, mixes by 1:1, meets continuous grading.
Preferably, the mass ratio of described cement and fine aggregate is 1.00:(1.80～2.40), fine aggregate used by the present invention does not has
There is particular restriction.
Described rubber grain is the rubber grain that junked tire is made, and preferable particle size is 0.85-1.40mm, sends out with fine aggregate
Wave phase same-action, the elasticity of concrete can be improved, improve the plastic deformation of concrete.
When described silica flour is smelting commercial silicon or silicon-containing alloy produce the recovered silica flour obtained of industrial dust, preferably than
Surface area is 20 × 103～23 × 103m2/ kg, owing to silica flour has extremely strong volcanic ash performance, can accelerate the aquation mistake of cement
Journey, improves the mechanical property of concrete.It is furthermore preferred that the SiO of described silica flour2Content is 98.5%, and loss on ignition is 2.14%, contains
Water rate is 0.3%, chloride ion content 0.017%, and total alkali content is 0.4%.
Described steel fibre is sheared by general steel plate and repressed molding, preferably draw ratio are 45～60, and more preferably tension is strong
Degree is 600MPa, and density is 7.82～7.85g/cm3；Bridge joint that after addition, random distribution can produce in concrete substrate and drawing
Knot effect, it is possible to effectively hinder extension and the formation of macrocrack of inside concrete microcrack, improve concrete performance.
Preparing of described renewable concrete also includes in raw material that water reducer, actual amount and substance classes do not have special wanting
Ask.
The present invention utilizes rubber grain, silica flour and the steel fibre synergism in concrete substrate and confounding effect, altogether
With improving the mechanical property of regeneration concrete so that it is there is outstanding resistance to compression, bending performance, it is adaptable to all kinds of concrete workses,
Rubber grain, silica flour, steel fibre and regenerated coarse aggregate are regrown material, wide material sources, can improve the recycling of resource
Efficiency, reduces environmental pollution, and expands the range of application of regenerated coarse aggregate.
The present invention further provides the preparation method of regeneration concrete, comprise the steps:
By regenerated coarse aggregate, steel fibre and rubber grain mix and blend, it is stirred for after adding silica flour, cement and fine aggregate,
Add water reducer and water mixing, obtain regeneration concrete slurry, through overcuring, maintenance, obtain renewable concrete.Described solid
Change, the condition of maintenance is not particularly limited.
The method have the advantages that
(1) present invention utilizes the high resiliency of rubber, the volcanic ash of silica flour and micro-packing effect and the bridge joint of steel fibre and draws
Knot effect, the comprehensive mechanical property improving regeneration concrete；
(2) rubber grain that the present invention uses is that junked tire process obtains, and wide material sources, are to have elastomeric toughness
Material, it is possible to relax the various stress of inside concrete, reduces generation and the development of inside concrete pre-existing fracture, moreover it is possible to preferably
Ground improves energy-absorbing and the energy dissipation capacity of concrete；
(3) silica flour that the present invention uses is the waste material that smelting commercial silicon produces, and wide material sources have extremely strong Pozzolanic feature
Can, Ca disadvantageous to intensity (OH) can be produced with hydrated cementitious2Reaction generates C-S-H gel, accelerates the hydration process of cement, no
It is only capable of reducing the use of cement, moreover it is possible in the intensity that reduction is brought due to the self-defect of regenerated coarse aggregate and the addition of rubber
Loss, improves the mechanical property of concrete, such as resistance to compression, bent toughness；
(4) steel fibre random distribution can produce in concrete substrate bridge joint and drawknot effect, can improve concrete
Crack resistance and obtain preferable toughness and ductility；
(5) summary properties of materials of the present invention, can significantly improve the performance of regeneration concrete, makes garbage waste become
Waste be changed into values, cycling and reutilization, may advantageously facilitate regenerated coarse aggregate rationally, be widely used in the construction project of reality, save
Social resources, reduce environmental pollution.
Detailed description of the invention
The present invention can pass through examples below further instruction, but embodiment is not the limit to scope
System.
In the embodiment of the present invention 1,2, the preparation method of regeneration concrete slurry is: take the thick bone of regeneration of two kinds of particle size range
Material mixing, then mix with steel fibre, rubber grain put into blender stir 90 seconds, then by silica flour, cement and fine aggregate addition
Blender is stirred for 90 seconds making it be sufficiently mixed uniformly, then water reducer mixes addition blender stirring 180 seconds with water, obtains again
Growing concrete slurry.
The concrete of another preparation contrast: take the natural coarse aggregate mixing of two kinds of particle size range, then mix with steel fibre and put into
Blender stirs 90 seconds, then cement and fine aggregate is added blender and is stirred for 90 seconds making it be sufficiently mixed uniformly, then will subtract
Water preparation mixes addition blender and stirs 180 seconds with water, obtains the natural concrete slurry of contrast.
Rubber grain, silica flour, steel fibre, regenerated coarse aggregate, fine aggregate, cement, water and the use of water reducer in embodiment 1,2
In amount and comparative example, the consumption of natural coarse aggregate, fine aggregate, steel fibre, cement, water and water reducer sees table 1, number in table
According to material usage (unit: the kg/m for unit volume regeneration concrete3).
Table 1
Note: additional water is to consider the feature that regeneration aggregate water absorption rate is bigger, for making the ratio of mud of concrete keep constant, volume
Outer increase is with 2% calculated additional water of regeneration aggregate quality
The parameter index of the various materials that embodiment 1,2 and comparative example use is as follows:
(1) cement: use the Portland cement of stone well board 42.5R grade；
(2) fine aggregate: use the natural fine aggregate of continuous grading, for proportion be 2.69, modulus of fineness be 2.52, in thick
Fluvial sand；
(3) natural coarse aggregate: be respectively the particle diameter natural coarse aggregate between 5mm～10mm and 10mm～20mm, mass ratio
1:1, meets continuous grading；
(4) regenerated coarse aggregate: Shenzhen Lvfa Pengcheng Environmental Science and Technology Co., Ltd. produces, respectively particle diameter between 5mm～
The regenerated coarse aggregate of 10mm and 10mm～20mm, mass ratio 1:1, meet continuous grading, water absorption rate is 2%, removes foreign material such as glass
Glass, wood flour, fragment of brick etc., after clean water, dry stand-by naturally.
(5) rubber grain: grain diameter is 0.85-1.40mm, density is 1.05g/cm3, fusing point is 170 DEG C；
(6) silica flour: east, Chengdu Cyanastraceae company limited produces, SiO2Content is 98.5%, and loss on ignition is 2.14%, compares table
Area is 22.99 × 103m2/ kg, moisture content is 0.3%, chloride ion content 0.017%, and total alkali content is 0.4%；
(7) steel fibre: the shearing wave wave type fiber that Guangzhou Jin Yue new material company limited provides, is sheared by general steel plate
And repressed molding, a length of 32mm, draw ratio is 45, and tensile strength is 600MPa, and density is 7.82g/cm3, fusing point is
1538℃；
(8) water reducer: Jiangmen, Guangdong Province strength building materials Science and Technology Ltd. produces, and model is QL-PC5.
Pour concrete slurry prepared by above-described embodiment 1,2 and comparative example into standard mold and vibrate with vibrating spear
Closely knit, with covered rearing with plastic film, form removal after maintenance 24 hours, for making intensity reach stable, indoor water seasoning 28 days, then
Outdoor standing 90 days, obtains 1-3# concrete sample, tests, by material compression test to φ 150mm × 300mm's
Standard cylinder carries out loading axial compressive strength and the elastic modelling quantity of test gained concrete in uniaxial compression, by totally
Word electro-hydraulic servo static and dynamic test machine carries out three point bending test test gained concrete to the girder of 100mm × 100mm × 515mm
Rupture strength, data are shown in Table 2.
Table 2
From data in table, the concrete of regeneration concrete relative contrast's embodiment prepared by the present invention, silica flour can increase
The comprcssive strength of strong regeneration concrete, can obtain comprcssive strength more higher than natural concrete, i.e. silica flour when rubber low-dosage
All can improve the toughness of concrete with rubber, fracture toughness is all high than natural concrete.And the incorporation effect of rubber is especially pronounced,
Along with increasing of rubber volume, energy to failure is significantly increased.
It is last it should be noted that, the present invention is only protected by above example in order to technical scheme to be described
The restriction of scope.It will be understood by those of skill in the art that technical scheme can be carried out some deductions or etc.
With replacing, without deviating from the spirit and scope of technical solution of the present invention.
Claims (7)
1. a regeneration concrete, by including cement, water, fine aggregate, regenerated coarse aggregate, silica flour, steel fibre, rubber grain, subtracting
Prepared by the raw material of water preparation, the mass ratio of described regenerated coarse aggregate, steel fibre and rubber grain is (2.80～3.00): (0.20～
0.25): (0.05～0.20).
2. regeneration concrete as claimed in claim 1, it is characterised in that described cement, silica flour are 1.00 with the mass ratio of water:
(0.05～0.15): (0.50～0.55).
3. regeneration concrete as claimed in claim 1, it is characterised in that described cement with the mass ratio of regenerated coarse aggregate is
1.00:(2.80～3.00).
4. regeneration concrete as claimed in claim 1, it is characterised in that described cement is 1.00 with the mass ratio of fine aggregate:
(1.80～2.40).
5. the regeneration concrete as described in any one of claim 1-4, it is characterised in that described rubber grain is that particle diameter is
0.85-1.40mm。
6. the regeneration concrete as described in any one of claim 1-4, it is characterised in that the specific surface area of described silica flour is 20 ×
103～23 × 103m2/kg。
7. the preparation method of the regeneration concrete as described in any one of claim 1-4, is by regenerated coarse aggregate, steel fibre and rubber
Glue granule mix and blend, stirs after adding silica flour, cement and fine aggregate, adds water reducer and water mixing, obtains regenerating coagulation
Soil paste material, through overcuring, maintenance, obtains renewable concrete.
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| CN107602145A (en) * | 2017-09-13 | 2018-01-19 | 无锡市交通工程有限公司 | A kind of high-ductility concrete and the concrete road surface using its cast |
| CN108046703A (en) * | 2017-12-21 | 2018-05-18 | 广东基业长青节能环保实业有限公司 | A kind of grinding ecological environment-friendly type composite concrete abrasive body and preparation method thereof |
| CN108558323A (en) * | 2018-06-07 | 2018-09-21 | 西安理工大学 | Add the regeneration concrete and preparation method thereof of waste tire rubber granule and iron wire |
| CN108751842A (en) * | 2018-06-07 | 2018-11-06 | 西安理工大学 | A kind of high-strength regeneration concrete and preparation method thereof adding waste and old cable |
| CN109369121A (en) * | 2018-11-27 | 2019-02-22 | 武汉大学 | A kind of manufacture craft of high-elastic modulus fibre seif-citing rate regeneration concrete |
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| CN112250377A (en) * | 2020-09-22 | 2021-01-22 | 河南兴达商砼有限公司 | Fair-faced concrete and production process thereof |
| CN113603422A (en) * | 2021-08-23 | 2021-11-05 | 崇德建材集团有限公司 | Anti-cracking recycled concrete |
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| CN108046703A (en) * | 2017-12-21 | 2018-05-18 | 广东基业长青节能环保实业有限公司 | A kind of grinding ecological environment-friendly type composite concrete abrasive body and preparation method thereof |
| CN108046703B (en) * | 2017-12-21 | 2020-06-23 | 广东基业长青节能环保实业有限公司 | Ecological environment-friendly composite concrete grinding body for grinding and preparation method thereof |
| CN108751842A (en) * | 2018-06-07 | 2018-11-06 | 西安理工大学 | A kind of high-strength regeneration concrete and preparation method thereof adding waste and old cable |
| CN108558323A (en) * | 2018-06-07 | 2018-09-21 | 西安理工大学 | Add the regeneration concrete and preparation method thereof of waste tire rubber granule and iron wire |
| CN109369121A (en) * | 2018-11-27 | 2019-02-22 | 武汉大学 | A kind of manufacture craft of high-elastic modulus fibre seif-citing rate regeneration concrete |
| CN109455998A (en) * | 2018-11-27 | 2019-03-12 | 武汉大学 | A kind of manufacture craft of steel pipe fiber seif-citing rate regenerated aggregate concrete column |
| CN109928689A (en) * | 2019-04-20 | 2019-06-25 | 方宝 | A kind of regeneration concrete and preparation method thereof |
| CN111087188A (en) * | 2019-12-30 | 2020-05-01 | 深圳市宝金华混凝土有限公司 | Concrete processing technology doped with waste concrete blocks |
| CN112250377A (en) * | 2020-09-22 | 2021-01-22 | 河南兴达商砼有限公司 | Fair-faced concrete and production process thereof |
| CN113603422A (en) * | 2021-08-23 | 2021-11-05 | 崇德建材集团有限公司 | Anti-cracking recycled concrete |
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Application publication date: 20161207 |