CN103771783B - A kind of iron tailings sand cement concrete that is applied to road surface - Google Patents
A kind of iron tailings sand cement concrete that is applied to road surface Download PDFInfo
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- CN103771783B CN103771783B CN201410014497.2A CN201410014497A CN103771783B CN 103771783 B CN103771783 B CN 103771783B CN 201410014497 A CN201410014497 A CN 201410014497A CN 103771783 B CN103771783 B CN 103771783B
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- iron tailings
- tailings sand
- concrete
- cement
- cement concrete
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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
Abstract
Be applied to the iron tailings sand cement concrete on road surface, belong to the E portion fixed buildings road class technical field of International Classification of Patents IPC. It is characterized in that analyzing the material character of iron tailings sand; Determine the concrete match ratio of iron tailings sand cement that meets cement concrete pavement requirement of strength; 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; By calculating, determine the textural association that meets iron tailings sand cement concrete road surface strength and stiffness. Effect of the present invention and benefit are: this design 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.
Description
Technical field
The E portion fixed buildings road class technical field that the invention belongs to International Classification of Patents IPC, relates to coagulating cementThe problem of materials of soil surface, is specifically applied to iron tailings sand and in cement concrete pavement, prepares a kind of novel iron tailings sandCement concrete.
Background technology
Mine resources is the important natural resources that human society is depended on for existence, the energy of China 95%, 85% the raw material of industryAnd 70% capital goods in the agricultural sector are all taking mineral products as raw material. Mill tailings loss and nearby tailing disposal, cause mine tailing to be filled outGood farmland is ploughed, is fallen into oblivion in full depression, the erosion of desertifying; Mine tailing imports river, and alluvial river course, even leads to flooding of rivers, mud-rock flow etc.Geological disaster. Forbid Ha Noi and adopt sand, cut into a mountain and get stone due to current some places, make traditional pavement material is in short supply originally problem moreAdd outstandingly, seek new material and replace traditional pavement material imperative, and the trend of future trajectory Materials should beDraw close to green, coordinate environment; Should make full use of discarded object simultaneously, carry out sustainable development.
The pavement performance of portland cement concrete is studied comparative maturity, and has specification as guidance, but iron tailThe pavement performance research of ore in sand form cement concrete, desirable experience is fewer, along with China's rapid development of economy, rural area cementThe annual Construction amount of 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 cementConcrete road surface surface layer can utilize solid waste iron tailings on a large scale, and its anti-folding and other mechanical properties meet public simultaneouslyRoad all technical requirement, has realized the recycling of iron tailings, has solved environmental pollution and sand that iron ore mine bringsThe problem that stone material is in short supply.
Technical scheme of the present invention is: analyze the material character of iron tailings sand, carry out iron tailings sand cement concrete match ratioThan calculating: (1) determines that cement 28d actual measurement rupture strength (2) determines that flexural-tensile strength of concrete (3) determines that the ratio of mud (4) determines mixedSolidifying native workability: slump 20mm(5) iron tailings grain fineness number modulus (6) determines that sand coarse aggregate ratio (7) unit of account water consumption (8) determines mixedSolidifying native match ratio: cement: water: sand: stone=399:159:542:1465.
With cement: the match ratio mix of water: sand: stone=399:159:542:1465, adds 0.3% naphthalene system in mix processWater reducer, water reducer fully shakes up before using, and makes to precipitate abundant dissolving, manufactures iron tailings sand cement concrete sample, maintenance28d, take rupture strength >=4.5 as technical indicator, according to observed strength and the contrast of rupture strength technical indicator, adjusts match ratio,The concrete pavement performance of iron tailings sand cement that meets road panel requirement of strength is studied, determined iron tailings sand cementConcrete parameter of structure design value.
Effect of the present invention and benefit are: iron tailings sand cement concrete can be applied to asphalt by iron tailings sandIn, realize the comprehensive recycling of iron tailings, carry out comprehensive recovery and the utilization of resource of tailings. Effectively alleviate Concrete IndustryThe deficient pressure of natural sand resource. Along with social high speed development, during rural area low-grade highway is being built on a large scale, iron tailOre in sand form cement concrete can meet the technical indicator of inferior grade rural highway, reduces the cost of building rural highway.
Brief description of the drawings
Accompanying drawing 1 is iron tailings sand grading curve figure in iron tailings sand cement concrete, and in figure, abscissa is screen size(mm), ordinate is for passing through mass percent (%).
Detailed description of the invention
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 rupture strength 5.5MPa
(2) determine flexural-tensile strength of concrete 5.0MPa
(3) determine the ratio of mud 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) unit 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 sinkForm sediment and fully dissolve.
3. measure iron tailings sand cement concrete performance.
Preliminary Determination maintenance 28d, measures anti-folding and compression strength, and through determining that rupture strength is greater than 4.5, compression strength is greater than35, according to observed strength and the intensity contrast of wanting to reach, adjust match ratio, 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. an iron tailings sand cement concrete that is applied to road surface, is applied to cement concrete by iron tailings sand asphaltIn pavement engineering, go, it is characterized in that: analyze the material character of iron tailings sand, with cement: water: CHARACTERISTICS OF TAILINGS SAND: stone=399:159:The match ratio mix of 542:1465, adds 0.3% naphthalene water reducer in mix process, water reducer fully shakes up before using, and makes to sinkForm sediment and fully dissolve, make iron tailings sand cement concrete sample, maintenance 28d, is index taking rupture strength >=4.5, according to actual measurementIntensity and the intensity contrast of wanting to reach, adjust match ratio, to meeting the iron tailings sand cement coagulation of road panel requirement of strengthThe pavement performance of soil is studied, and determines 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 CN103771783A (en) | 2014-05-07 |
| CN103771783B true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (1)
| 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 |
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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|---|
| CN103771783A (en) | 2014-05-07 |
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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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