CN104108914B - C20 level simple grain level self-compacting regeneration concrete and preparation method thereof - Google Patents
C20 level simple grain level self-compacting regeneration concrete and preparation method thereof Download PDFInfo
- Publication number
- CN104108914B CN104108914B CN201410309746.0A CN201410309746A CN104108914B CN 104108914 B CN104108914 B CN 104108914B CN 201410309746 A CN201410309746 A CN 201410309746A CN 104108914 B CN104108914 B CN 104108914B
- Authority
- CN
- China
- Prior art keywords
- coarse aggregate
- concrete
- water
- aggregate
- cement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of C20 level simple grain level self-compacting regeneration concrete and preparation method thereof, the component that this concrete comprises is as follows: cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash, admixture, and wherein water-cement ratio is (0.42 ~ 0.45); Regenerated coarse aggregate accounts for 30% ~ 70% of coarse aggregate total mass, the discarded concrete containing brickbat of to be particle diameter be 10mm ~ 20mm, simple grain grating; Preparation method is: sieve gets regenerated coarse aggregate; The concrete layer of identical proportioning is coated with at stirrer inwall; The order from coarse to fine according to granularity feeds intake, dry mixing; Add water and additional water, continue to stir 1min ~ 2min, to obtain final product.Gained C20 self-compacting concrete has good mobility, gap by property, education resistance, meets requirement of strength.Reduce concrete production cost while constructability, preparation method is simple, is applicable to suitability for industrialized production.
Description
Technical field
The invention belongs to building material technical field, what be specifically related to is a kind of method adopting the discarded concrete containing brickbat in building demolition thing to prepare regeneration self-compacting concrete as simple grain level regenerated coarse aggregate replacement part natural coarse aggregate.
Background technology
To remove and the shortening in buildings work-ing life itself result in a large amount of building waste concretes.And the main application of discarded concrete is processed into regeneration aggregate to prepare normal concrete at present.Self-compacting concrete is a kind of high performance concrete being different from normal concrete, and its Performance evaluation criterion is shown in CCES02-2004 " self-compacting concrete direction of design and construction " and JGJT283-2012 " self-compacting concrete utilisation technology code ".Its there is very high mobility and do not emanate in casting process, not bleeding, the concrete of masterplate and parcel reinforcing bar can be full of without vibrating, may be used for the building of non-structural element in newly-built structure engineering (as basis, infilled wall, partition wall etc.), region cannot be vibrated in reinforcing bar compact district, repairing and reinforcing engineering, prefabricated non-structural element etc.Therefore utilize building waste concrete preparation self-compacting regenerated aggregate concrete not only can effectively solve environment that building waste causes and social concern, environmental protection, can also produce considerable economic benefit.
What existing regeneration aggregate prepared that self-compacting concrete adopts is all the regeneration aggregate of continuous grading, the regeneration aggregate production process of continuous grading is loaded down with trivial details, if adopt simple grain grating regenerated coarse aggregate not only can simplify the operation of artificial adjustment regenerated coarse aggregate grating, and save production cost.At present, there is no the research report preparing high performance flowing concrete about the regeneration aggregate adopting simple grain level containing brickbat.
Summary of the invention
The object of the present invention is to provide a kind of C20 level simple grain level self-compacting regeneration concrete, adopt the discarded concrete containing brickbat to replace part natural coarse aggregate as simple grain level coarse aggregate, make full use of building waste, economize on resources, reduce production cost.
Another object of the present invention is the preparation method providing a kind of C20 level simple grain level self-compacting regeneration concrete, simplifies manufacturing procedure.
In order to realize foregoing invention object, present invention employs following technical scheme:
A kind of C20 level simple grain level self-compacting regeneration concrete, the weight ratio of each component is as follows: cement: regenerated coarse aggregate: natural coarse aggregate: fine aggregate: water: additional water: flyash: admixture=1:(0.68 ~ 1.60): (0.66 ~ 1.71): (1.85 ~ 1.98): (0.52 ~ 0.56): (0.03 ~ 0.08): (0.24 ~ 0.25): (0.003 ~ 0.004), wherein water-cement ratio is (0.42 ~ 0.45).
Described regenerated coarse aggregate be discarded concrete containing brickbat after fragmentation, sieve the particle diameter that the obtains simple grain grating in 10mm ~ 20mm scope.Coarse aggregate comprises natural coarse aggregate and regenerated coarse aggregate, and wherein regenerated coarse aggregate accounts for the ratio (namely replacing the substitution rate of natural coarse aggregate) of the total mass of coarse aggregate is 30% ~ 70%.
Described fine aggregate is medium sand;
Described admixture is high-efficiency water-reducing agent of poly-carboxylic acid;
Described cement is PC32.5 composite Portland cement;
Described flyash is I level flyash.
The invention still further relates to a kind of C20 level simple grain level self-compacting regeneration concrete preparation method, comprise the following steps:
(1) discarded concrete in building waste is passed through sorting, broken and screening, after screening out the particle being less than 9.50mm and being greater than 20mm, be processed into regenerated coarse aggregate with aggregate size in 10mm ~ 20mm particle diameter section;
(2) for preventing sticky pot, first by than taking cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash, admixture, pre-mixing concrete, consumption makes stirrer inwall evenly be coated with last layer sand-cement slurry, after machine inwall to be mixed is stained with cement sand bed, take out residual concrete;
(3) cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and admixture is taken by proportioning, order in strict accordance with regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and admixture feeds intake and then starts stirrer, dry mixing 1min ~ 2min; It is even that this step contributes to each raw material mix according to the order of addition(of ingredients) dry mixing that material particle size is from coarse to fine;
(4) add load weighted water and additional water, continue to stir 1min ~ 2min, to obtain final product.
For the autodensing concrete almixture that fine powder content, superplasticizer content are more, the time that all raw material mixs is evenly required significantly increases, churning time or even normal concrete 2 times, major cause is that self-compacting concrete has higher Slurry transport, step (3) adopts and first adds coarse aggregate and add other powder body material dry mixing again and not only can make to stir, and can reduce powder and cohere on agitator, improves stirring efficiency, reduce churning time, improve output.
Beneficial effect of the present invention is: except cement, stone, sand and water four kinds of raw materials that starting material of the present invention are often used except normal concrete, also comprise discarded concrete simple grain level regenerated coarse aggregate, flyash and the High-efficiency polycarboxylic acid water reducer containing brickbat, the mobility of the regeneration self-compacting concrete prepared, fillibility, education resistance, gradual loss and intensity all meet related request, reduce concrete production cost.Meanwhile, can also solve the problem of building waste process, alleviate the pressure of resource exhaustion, environmental protection, preparation method is simple, easy construction, is applicable to suitability for industrialized production.
Accompanying drawing explanation
Fig. 1 is the graph of relation kicking down divergence of recycled coarse aggregate contents of the present invention and self-compacting regeneration concrete;
Fig. 2 is the T of recycled coarse aggregate contents of the present invention and self-compacting regeneration concrete
500the graph of relation of flowing time;
Fig. 3 is the L-type instrument H of recycled coarse aggregate contents of the present invention and self-compacting regeneration concrete
2/ H
1graph of relation;
Fig. 4 is the graph of relation of the 28d cubic compressive strength of recycled coarse aggregate contents of the present invention and self-compacting regeneration concrete.
From Fig. 1,3, when recycled coarse aggregate contents is 50%, the divergence that kicks down of self-compacting regeneration concrete is 700mm to the maximum, reaches fillibility SF2 grade, L-type instrument H
2/ H
1be 0.86 to the maximum and reach gap by property, education resistance II grade;
From Fig. 2,4, the T of self-compacting regeneration concrete when recycled coarse aggregate contents is 70%
500flowing time optimum is 4.9s, reaches fillibility VS1 grade; As shown in Figure 4, when recycled coarse aggregate contents is 30%, the 28d cubic compressive strength of self-compacting regeneration concrete is maximum reaches 24.9MPa.Serviceability and cubic compressive strength all meet the demands.
Embodiment
The raw material that the application's following examples adopt is as follows:
Cement: PC32.5 composite Portland cement, apparent density is 3.1g/cm
3.
Flyash: 1 grade of flyash, apparent density 2.04g/cm
3.
Sand: fineness modulus is the medium sand of 2.36, apparent density is 2.65g/cm
3, tap density is 1.45g/cm
3, water ratio is 0.4%.
Natural coarse aggregate: the rubble of 5 ~ 20mm continuous size fraction, apparent density is 2.75g/cm
3, tap density is 1.35g/cm
3, water-intake rate is 0.45%.
Regenerated coarse aggregate: by the discarded concrete in building waste through sorting, broken and screening, after screening out the particle being less than 9.50mm and being greater than 20mm, be processed into regenerated coarse aggregate with aggregate size in 10mm ~ 20mm particle diameter section, apparent density is 2.35g/cm
3, tap density is 1.23g/cm
3, water-intake rate is 4.76%.
Admixture: high-efficiency water-reducing agent of poly-carboxylic acid.
Water: tap water.
Embodiment
The raw material that embodiment 1-3 adopts and consumption are shown in Table 1, and the unit of each component is: kg/m
3:
Table 1
The raw materials used weight ratio of embodiment 1-3 shown in table 1 is as shown in table 2:
Table 2
Preparation method:
(1) for preventing sticky pot, take cement fine aggregate, water, flyash (making premixing mortar enough make stirrer inwall be stained with sand-cement slurry) by proportioning, premixing, machine inwall to be mixed is stained with sand-cement slurry, takes out residue mortar;
(2) cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and admixture is taken by proportioning, order in strict accordance with regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and admixture feeds intake and then starts stirrer, dry mixing 1min ~ 2min;
(3) add load weighted water and additional water, continue to stir 1min ~ 2min.
The performance test data of embodiment 1-5 gained C20 level simple grain level self-compacting regeneration concrete is in table 3:
Table 3
Above-mentioned embodiment does not limit technical scheme of the present invention in any form, and the technical scheme that the mode that every employing is equal to replacement or equivalent transformation obtains all drops on protection scope of the present invention.
Claims (2)
1.C20 level simple grain level self-compacting regeneration concrete, it is characterized in that the weight ratio of each component is as follows: cement: regenerated coarse aggregate: natural coarse aggregate: fine aggregate: water: additional water: flyash: admixture=1:(0.68 ~ 1.60): (0.66 ~ 1.71): (1.85 ~ 1.98): (0.52 ~ 0.56): (0.03 ~ 0.08): (0.24 ~ 0.25): (0.003 ~ 0.004), wherein water-cement ratio is (0.42 ~ 0.45);
Described regenerated coarse aggregate be discarded concrete containing brickbat through broken, sieve the simple grain grating that the particle diameter obtained is 10mm ~ 20mm;
Natural coarse aggregate and regenerated coarse aggregate are collectively referred to as coarse aggregate, and wherein regenerated coarse aggregate accounts for 30% ~ 70% of coarse aggregate total mass; Described fine aggregate is medium sand; Described admixture is high-efficiency water-reducing agent of poly-carboxylic acid; Described cement is PC32.5 composite Portland cement; Described flyash is I level flyash.
2., based on the preparation method of C20 level simple grain level self-compacting regeneration concrete according to claim 1, comprise the following steps:
(1) by the discarded concrete in building waste through sorting, broken and screening, after screening out the particle being less than 9.50mm and being greater than 20mm, using aggregate size in 10mm ~ 20mm particle diameter section as regenerated coarse aggregate;
(2) for preventing sticky pot, first by than taking cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash, admixture, pre-mixing concrete, consumption makes stirrer inwall evenly be coated with last layer sand-cement slurry, after machine inwall to be mixed is stained with cement sand bed, take out residual concrete;
(3) cement, regenerated coarse aggregate, natural coarse aggregate, fine aggregate, water, additional water, flyash and admixture is taken by proportioning, order in strict accordance with regenerated coarse aggregate, natural coarse aggregate, fine aggregate, cement, flyash and admixture feeds intake and then starts stirrer, dry mixing 1min ~ 2min;
(4) add load weighted water and additional water, continue to stir 1min ~ 2min, to obtain final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410309746.0A CN104108914B (en) | 2014-07-01 | 2014-07-01 | C20 level simple grain level self-compacting regeneration concrete and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410309746.0A CN104108914B (en) | 2014-07-01 | 2014-07-01 | C20 level simple grain level self-compacting regeneration concrete and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104108914A CN104108914A (en) | 2014-10-22 |
| CN104108914B true CN104108914B (en) | 2016-03-30 |
Family
ID=51705927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410309746.0A Active CN104108914B (en) | 2014-07-01 | 2014-07-01 | C20 level simple grain level self-compacting regeneration concrete and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104108914B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106747051A (en) * | 2016-11-23 | 2017-05-31 | 陈毅桦 | C20 grades is mixed slag regeneration aggregate self-compacting concrete and preparation method thereof |
| CN114149223A (en) * | 2021-11-15 | 2022-03-08 | 北京建工资源循环利用投资有限公司 | Recycled concrete replaced by brick-concrete recycled coarse and fine aggregates and preparation method thereof |
| CN115784678B (en) * | 2022-10-13 | 2024-01-19 | 北京超薪创艺科技有限公司 | Preparation method of self-compacting sintered lightweight aggregate foamed concrete |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN103613334A (en) * | 2013-11-21 | 2014-03-05 | 河北建筑工程学院 | High-performance light-weight aggregate concrete and preparation method thereof |
-
2014
- 2014-07-01 CN CN201410309746.0A patent/CN104108914B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121819A (en) * | 2013-03-05 | 2013-05-29 | 北京新奥混凝土集团有限公司 | C30 self-compacting concrete prepared from recycled aggregate and preparation method thereof |
| CN103613334A (en) * | 2013-11-21 | 2014-03-05 | 河北建筑工程学院 | High-performance light-weight aggregate concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 用非连续级配粗集料配制混凝土的应用;陈智;《铁道标准设计》;20031231(第3期);第57-60页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104108914A (en) | 2014-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103936369B (en) | C30 level simple grain level regeneration self-compacting concrete and preparation method thereof | |
| CN102849999B (en) | Water-absorbent concrete and preparation method thereof | |
| CN103936368B (en) | C40 level simple grain level regeneration self-compacting concrete and preparation method thereof | |
| Almuwbber et al. | The influence of variation in cement characteristics on workability and strength of SCC with fly ash and slag additions | |
| Viacava et al. | Self-compacting concrete of medium characteristic strength | |
| CN109320163A (en) | Low glue material self-compacting concrete of a kind of C30 and preparation method thereof | |
| CN110066158A (en) | Lightweight self-compacting concrete and preparation method thereof | |
| CN108706928A (en) | A kind of brick concrete mixed regeneration coarse aggregate concrete and preparation method thereof | |
| CN105152597B (en) | Using regenerated aggregate concrete of discarded clay brick and discarded concrete and preparation method thereof | |
| CN107032695A (en) | Steel Fiber Reinforced Self-compacting Concrete and preparation method thereof, prefabricated components | |
| CN104108914B (en) | C20 level simple grain level self-compacting regeneration concrete and preparation method thereof | |
| CN101921089A (en) | Mortar powder, mortar slurry and preparation method thereof | |
| CN103130463B (en) | C15 concrete prepared from recycled aggregate and preparation method thereof | |
| CN115073093A (en) | Low-shrinkage high-strength self-compacting recycled concrete and preparation method thereof | |
| CN106495612A (en) | A kind of motar composition | |
| CN106478027A (en) | A kind of ground mortar composition | |
| CN104827561B (en) | A kind of steam pressure PHC pile tube preparation methods without remaining slurry | |
| CN103130472A (en) | C10 concrete prepared from recycled aggregate and preparation method thereof | |
| JP6165447B2 (en) | Method for producing concrete with reduced bleeding | |
| JP2006306679A (en) | Method for producing cement-based composition, and cement-based composition | |
| Bouziani et al. | Mixture design approach to evaluate fresh properties of SCC made with various sands | |
| CN107382207A (en) | A kind of Machine-made Sand decorative mortar and preparation method thereof | |
| CN104496354B (en) | A kind of cement-based grouting material and preparation method thereof | |
| Scheydt et al. | Development and application of UHPC convenience blends | |
| Tomar et al. | Strength chracteristics of self-compacting concrete partially replaced with waste marble powder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190313 Address after: 443300 Four Groups of Xiangshui Tung Village, Wuyanquan Town, Yicheng City, Hubei Province Patentee after: YIDU LIHUA NOVEL BUILDING MATERIAL Co.,Ltd. Address before: Unit 2301-D, Bike Science and Technology Building, No. 9 Scientific Research Road, Yuehai Street High-tech Zone, Nanshan District, Shenzhen City, Guangdong Province, 518000 Patentee before: Shenzhen Gao Hang Intellectual Property Operation Co.,Ltd. Effective date of registration: 20190313 Address after: Unit 2301-D, Bike Science and Technology Building, No. 9 Scientific Research Road, Yuehai Street High-tech Zone, Nanshan District, Shenzhen City, Guangdong Province, 518000 Patentee after: Shenzhen Gao Hang Intellectual Property Operation Co.,Ltd. Address before: 212003 Mengxi Road, Jingkou District, Zhenjiang, Jiangsu Province, No. 2 Patentee before: Jiangsu University of Science and Technology |
|
| TR01 | Transfer of patent right |