CN103771783A - Iron tailings sand cement concrete applied to pavements - Google Patents
Iron tailings sand cement concrete applied to pavements Download PDFInfo
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- CN103771783A CN103771783A CN201410014497.2A CN201410014497A CN103771783A CN 103771783 A CN103771783 A CN 103771783A CN 201410014497 A CN201410014497 A CN 201410014497A CN 103771783 A CN103771783 A CN 103771783A
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- iron tailings
- tailings sand
- cement concrete
- concrete
- cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Road Paving Structures (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention provides iron tailings sand cement concrete applied to pavements, and belongs to the technical field of fixed constructions and roads in the part E of international patent classification (IPC). The iron tailings sand cement concrete is characterized in that the material property of iron tailings sand is analyzed; the mixture ratio of the iron tailings sand cement concrete meeting the strength requirements of cement concrete pavements is determined; the pavement performance of the iron tailings sand cement concrete meeting the strength requirements of road face plates is studied, and the structural design parameter choice of the iron tailings sand cement concrete is determined; the structural combination meeting the strength and rigidity of the iron tailings sand cement concrete pavements is determined through calculation. The iron tailings sand cement concrete applied to the pavements has the beneficial effects that the iron tailings sand can be applied to the asphalt cement concrete by the design, the comprehensive recycling and using of iron tailings are realized, and the comprehensive recycling and using of tailing resources are carried out; the pressure of shortage of natural sand resources in concrete industries is effectively relieved.
Description
Technical field
The invention belongs to the E portion fixed buildings road class technical field of International Classification of Patents IPC, relate to the problem of materials of cement concrete pavement, specifically iron tailings sand is applied to and in cement concrete pavement, prepares a kind of novel iron tailings sand cement concrete.
Background technology
Mine resources is the important natural resources that human society is depended on for existence, and the energy of China 95%, 85% industrial raw material and 70% capital goods in the agricultural sector are all take mineral products as raw material.Mill tailings loss and nearby tailing disposal, cause mine tailing to fill up depression, desertify and corrode arable land, annihilation good farmland; Mine tailing imports river, and alluvial river course, even leads to the geologic hazard such as flooding of rivers, rubble flow.Owing to current some places forbidding Ha Noi and adopt sand, cut into a mountain and get stone, make the problem that traditional pavement material is in short supply originally more outstanding, seek novel material and replace traditional pavement material imperative, and the trend of future trajectory Materials should be to draw close to green, coordinate environment; Should make full use of waste simultaneously, carry out Sustainable development.
The pavement performance of portland cement concrete is studied comparative maturity, and there is standard as guidance, but the concrete pavement performance research of iron tailings sand cement, desirable experience is fewer, along with China's rapid development of economy, the annual Construction amount in Rural Water muddy road road is growing, and seeking a kind of lower cost materials also becomes an important topic.
Summary of the invention
The object of this invention is to provide a kind of iron tailings sand cement concrete pavement material that is applied to road surface, make cement concrete pavement surface can utilize on a large scale solid waste iron tailings, its anti-folding and other mechanical properties meet the requirement of highway all technical simultaneously, realize the recycling of iron tailings, solved environmental pollution and sandstone material problem in short supply that iron ore mine brings.
Technical scheme of the present invention is: analyze the material character of iron tailings sand, carry out iron tailings sand cement concrete mix and calculate: (1) determines that cement 28d actual measurement folding strength (2) determines that flexural-tensile strength of concrete (3) determines that water cement ratio (4) determines workability of concrete: slump 20mm(5) iron tailings grain fineness number modulus (6) determines that sand coarse aggregate ratio (7) Units of Account water consumption (8) determines concrete mix: cement: water: sand: stone=399:159:542:1465.
With cement: the proportioning mix of water: sand: stone=399:159:542:1465, in mix process, add 0.3% naphthalene water reducer, water reducer fully shakes up before using, make to precipitate abundant dissolving, manufacture iron tailings sand cement concrete sample, maintenance 28d, it is technical indicator take folding strength >=4.5, according to observed strength and the contrast of folding strength technical indicator, adjust proportioning, the concrete pavement performance of iron tailings sand cement that meets road panel requirement of strength is studied, determined the concrete parameter of structure design value of iron tailings sand cement.
Effect of the present invention and benefit are: iron tailings sand cement concrete can be applied to iron tailings sand in asphalt, realize the comprehensive recycling of iron tailings, carry out comprehensive recovery and the utilization of resource of tailings.Effectively alleviate the deficient pressure of Concrete Industry natural sand resource.Along with social high speed development, during rural area low-grade highway is being built on a large scale, iron tailings sand cement concrete can meet the technical indicator of inferior grade rural highway, reduces the cost of building rural highway.
Accompanying drawing explanation
Accompanying drawing is iron tailings sand graduation curve figure in iron tailings sand cement concrete, and in figure, X-coordinate is size of mesh (mm), and ordinate zou is for passing through mass percent (%).
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with technical scheme and accompanying drawing.
1. iron tailings sand cement concrete mix calculates.
(1) determine cement 28d actual measurement folding strength 5.5MPa
(2) determine flexural-tensile strength of concrete 5.0MPa
(3) determine water cement ratio 0.4
(4) determine workability of concrete: slump 20mm
(5) iron tailings grain fineness number modulus: 1.5
(6) determine sand coarse aggregate ratio 27%
(7) Units of Account water consumption 159kg/m3
(8) determine concrete mix: cement: water: sand: stone=399:159:542:1465
2. trial mix.
According to workability requirement, when trial mix, need add 0.3% naphthalene water reducer, water reducer fully shakes up before using, and makes to precipitate abundant dissolving.
3. measure iron tailings sand cement concrete performance.
Rough determination maintenance 28d, measures anti-folding and ultimate compression strength, and through determining that folding strength is greater than 4.5, ultimate compression strength is greater than 35, according to observed strength and the intensity contrast of wanting to reach, adjusts proportioning, to reaching requirement of strength.
Table 1 is iron tailings sand oxide content.
Oxide content in table 1 iron tailings sand
Table 2 is P.O.32.5 cement technology indexs.
Table 2P.O.32.5 cement technology index
Claims (1)
1. one kind is applied to the iron tailings sand cement concrete on road surface, it is a kind of novel cement concrete of research, iron tailings sand asphalt is applied in cement concrete pavement engineering and is gone, it is characterized in that: the material character of analyzing iron tailings sand, with cement: the proportioning mix of water: CHARACTERISTICS OF TAILINGS SAND: stone=399:159:542:1465, in mix process, add 0.3% naphthalene water reducer, water reducer fully shakes up before using, make to precipitate abundant dissolving, manufacture iron tailings sand cement concrete sample, maintenance 28d, it is index take folding strength >=4.5, according to observed strength and the intensity contrast of wanting to reach, adjust proportioning, the concrete pavement performance of iron tailings sand cement that meets road panel requirement of strength is studied, determine the concrete parameter of structure design value of iron tailings sand cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410014497.2A CN103771783B (en) | 2014-01-10 | 2014-01-10 | A kind of iron tailings sand cement concrete that is applied to road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410014497.2A CN103771783B (en) | 2014-01-10 | 2014-01-10 | A kind of iron tailings sand cement concrete that is applied to road surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103771783A true CN103771783A (en) | 2014-05-07 |
| CN103771783B CN103771783B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410014497.2A Active CN103771783B (en) | 2014-01-10 | 2014-01-10 | A kind of iron tailings sand cement concrete that is applied to road surface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348684A (en) * | 2016-08-24 | 2017-01-25 | 大连地拓重工有限公司 | Total tailing waste stone cement concrete for pavement |
| CN107352899A (en) * | 2017-07-07 | 2017-11-17 | 鞍钢集团矿业有限公司 | A kind of CS20 steel fiber shotcretes prepared using iron tailings sand |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967050A (en) * | 2009-07-28 | 2011-02-09 | 鞍钢集团矿业公司 | Flow-regime concrete mix with tailings in place of river sand |
| CN102320803A (en) * | 2011-09-10 | 2012-01-18 | 中国十七冶集团有限公司 | Self-compacting concrete prepared from iron ore tailings, and preparation method thereof |
| CN102491702A (en) * | 2011-11-07 | 2012-06-13 | 江苏建华管桩有限公司 | Concrete pile and preparation method thereof |
-
2014
- 2014-01-10 CN CN201410014497.2A patent/CN103771783B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967050A (en) * | 2009-07-28 | 2011-02-09 | 鞍钢集团矿业公司 | Flow-regime concrete mix with tailings in place of river sand |
| CN102320803A (en) * | 2011-09-10 | 2012-01-18 | 中国十七冶集团有限公司 | Self-compacting concrete prepared from iron ore tailings, and preparation method thereof |
| CN102491702A (en) * | 2011-11-07 | 2012-06-13 | 江苏建华管桩有限公司 | Concrete pile and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348684A (en) * | 2016-08-24 | 2017-01-25 | 大连地拓重工有限公司 | Total tailing waste stone cement concrete for pavement |
| CN107352899A (en) * | 2017-07-07 | 2017-11-17 | 鞍钢集团矿业有限公司 | A kind of CS20 steel fiber shotcretes prepared using iron tailings sand |
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| Publication number | Publication date |
|---|---|
| CN103771783B (en) | 2016-05-11 |
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| C14 | Grant of patent or utility model | ||
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Inventor after: Pan Baofeng Inventor after: Wang Fengmin Inventor after: Che Tiankai Inventor after: Du Xiaoguang Inventor after: Shi Yanning Inventor before: Pan Baofeng Inventor before: Shi Yanning |
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