CN111018433A - Application of tailings of iron separation from slag in concrete - Google Patents
Application of tailings of iron separation from slag in concrete Download PDFInfo
- Publication number
- CN111018433A CN111018433A CN201911110289.1A CN201911110289A CN111018433A CN 111018433 A CN111018433 A CN 111018433A CN 201911110289 A CN201911110289 A CN 201911110289A CN 111018433 A CN111018433 A CN 111018433A
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- China
- Prior art keywords
- tailings
- slag
- concrete
- sand
- application
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Classifications
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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
- 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
Abstract
The invention provides application of tailings of iron separation from slag in concrete; the concrete comprises cement, mineral powder, slag iron tailings, stones and sand; the weight components are cement 380, mineral powder 50-70, slag iron-dressing tailings 120-280, pebbles 1250 and sand 400-545 respectively; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
Description
Technical Field
The invention relates to the field of recycling of iron tailings from slag separation, in particular to application of iron tailings from slag separation in concrete.
Background
With the development of modern buildings to high-rise, large-span, light-weight, heavy-load and underground buildings and increasingly strict use environments, the demand for high-strength concrete is continuously increased. Engineering practice shows that: the cement, special mixing material and high-efficiency water reducing agent are very important materials for preparing high-strength concrete. The special mixed material mainly takes the blast furnace granulated slag micro powder as a preferred variety, and a plurality of manufacturers are processing and testing, and large-scale application indicates daily wait.
The fly ash is a raw material for manufacturing cement and has certain activity. The addition of a certain amount of fly ash in cement concrete can replace part of cement, save cost, increase workability, reduce bleeding and segregation phenomena, and improve concrete performance. Has the functions of retarding coagulation, reducing water, improving compactness and later strength, reducing hydration heat, inhibiting chapping and shrinkage and enhancing acid-base reaction resistance.
Our current research direction is: the activity of the tailings of iron separation from slag is used for replacing fly ash, fine sand and mineral powder in concrete, so that the cost is reduced; the river sand is used as a natural resource, is high in price and limited, reduces the dependence on the river sand, and reduces the cost. The iron tailings from slag separation are mainly used for cement admixtures at present, and the utilization value of the iron tailings is not fully utilized. The next step of research is carried out towards the production of high-strength and environment-friendly concrete.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the application of the tailings of iron separation from slag in concrete.
The invention solves the technical problems through the following technical means:
the application of the slag iron tailings in concrete, wherein the concrete comprises cement, mineral powder, slag iron tailings, stones and sand; the weight components are cement 380, mineral powder 50-70, slag iron-dressing tailings 120-285, pebbles 1250 and sand 400-545 respectively; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
As an improvement of the technical scheme, the weight components are respectively cement 380, mineral powder 70, slag-iron tailings 265, pebbles 1250 and sand 400.
As an improvement of the technical scheme, the water reducer further comprises an additive, wherein the additive is a polycarboxylic acid high-efficiency water reducer.
As an improvement of the technical scheme, the diameter of the stone is 5-25 mm.
As an improvement of the technical scheme, the sand is obtained by mixing machine-made sand and superfine sand in a weight ratio of 1:1, the fineness modulus of the machine-made sand is 3.2, and the fineness modulus of the superfine sand is 1.1.
As an improvement of the technical proposal, the type of the cement is P.O 42.5.
As an improvement of the above technical solution, the polyurethane particle is also included; the weight component of the polyurethane particles is 30-50; the diameter of the polyurethane particles is 0.3-1 mm.
The invention has the beneficial effects that:
activated slag iron-dressing tailings are adopted to replace partial cement, sand and mineral powder and completely replace fly ash, so that the cost of concrete raw materials is reduced, the slump, the workability and the cohesiveness of the concrete are obviously improved, the initial setting time is prolonged, and the 7-day strength and the 28-day strength are obviously improved; by adding the polyurethane particles, the stability, waterproofness, bending resistance, shock resistance and other properties of the concrete are obviously improved, and the concrete meets the requirements of ultrahigh and long-distance transportation and pumping.
The iron ore tailings of the slag separation contain mineral powder with the particle size less than 0.16mm, play a role in filling and compacting, and simultaneously react with CO in the air2Reaction to form Fe3O4The passive film blocks the carbonization way of the concrete, improves the frost resistance and the corrosion resistance of the concrete, and has better durability compared with the common concrete.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
The concrete comprises cement, mineral powder, slag iron tailings, stones and sand; setting a control group, wherein the concrete comprises the components of cement 380, mineral powder 70, fly ash 105, stones 1250 and sand 545 respectively by weight.
Example 1
The application of the tailings of iron separation from slag in the embodiment in concrete includes cement, mineral powder, tailings of iron separation from slag, stones and sand; the components by weight are respectively cement 380, mineral powder 70, slag iron tailings 120, stones 1250 and sand 545; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
Example 2
The application of the tailings of iron separation from slag in the embodiment in concrete includes cement, mineral powder, tailings of iron separation from slag, stones and sand; the components by weight are respectively cement 380, mineral powder 70, slag iron tailings 265, pebbles 1250 and sand 400; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
Example 3
The application of the tailings of iron separation from slag in the embodiment in concrete includes cement, mineral powder, tailings of iron separation from slag, stones and sand; the components by weight are respectively cement 380, mineral powder 60, slag iron tailings 275, stones 1250 and sand 400; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
Example 4
The application of the tailings of iron separation from slag in the embodiment in concrete includes cement, mineral powder, tailings of iron separation from slag, stones and sand; the components by weight are respectively cement 380, mineral powder 50, slag iron tailings 285, cobblestone 1250 and sand 400; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
Example 5
The application of the tailings of iron separation from slag in the embodiment in concrete includes cement, mineral powder, tailings of iron separation from slag, stones and sand; the weight components are respectively cement 380, mineral powder 50, slag iron tailings 685 and pebbles 1250; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating strong alkali under the condition that the pH value is more than or equal to 10, wherein the activation temperature is 20-85 ℃, and the activation time is 5 hours.
Through the tests of the examples 1-5, the slump, the workability and the cohesiveness of the concrete are obviously improved when the slag iron tailings are used for replacing all the fly ash, the initial setting time is prolonged, and the strength in 7 days and the strength in 28 days are obviously improved; in the embodiments 2-4, when the slag iron tailings are used for replacing all the fly ash, part of the sand and part of the mineral powder, the slump, the workability and the cohesiveness of the concrete are obviously improved, the initial setting time is increased, the 7-day strength and the 28-day strength are reduced more than those of the embodiment 1, but the strength is enhanced and the performance is increased compared with that of a control group; example 5 the slag iron tailings are used for replacing all fly ash and all sand, so that the slump, the workability and the cohesiveness of concrete are obviously reduced, the water demand is increased, the pumping requirement cannot be met, the initial setting time is shortened more, the construction is influenced, and the 7-day strength and the 28-day strength are improved more; does not meet the concrete standard.
In embodiments 1 to 5, the concrete further comprises an additive, wherein the weight component of the additive is 30 to 50; the additive is a polycarboxylic acid high-efficiency water reducing agent.
The diameter of the stones is 5-25 mm.
The sand is obtained by mixing machine-made sand and superfine sand in a weight ratio of 1:1, the fineness modulus of the machine-made sand is 3.2, and the fineness modulus of the superfine sand is 1.1.
The type of the cement is P.O 42.5.
The concrete also includes polyurethane particles; the weight component of the polyurethane particles is 30-50; the diameter of the polyurethane particles is 0.3 to 1 mm.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the present invention as defined by the appended claims.
Claims (7)
1. The application of the tailings of iron separation from slag in concrete is characterized in that: the concrete comprises cement, mineral powder, slag iron tailings, stones and sand; the weight components are cement 380, mineral powder 50-70, slag iron-dressing tailings 120-285, pebbles 1250 and sand 400-545 respectively; the particle size of the tailings of iron separation from slag is 0.1-0.5 mm, and the tailings are obtained by activating treatment through strong alkali under the condition that the pH value is more than or equal to 10, the activation temperature is 20-85 ℃, and the time is 5 hours.
2. The application of the slag iron tailings of claim 1 in concrete is characterized in that: the components by weight are respectively cement 380, mineral powder 70, slag iron tailings 265, pebbles 1250 and sand 400.
3. The application of the slag iron tailings of claim 1 in concrete is characterized in that: the water reducer also comprises an additive, wherein the additive is a polycarboxylic acid high-efficiency water reducer.
4. The application of the slag iron tailings of claim 1 in concrete is characterized in that: the diameter of the stones is 5-25 mm.
5. The application of the slag iron tailings of claim 1 in concrete is characterized in that: the sand is obtained by mixing machine-made sand and superfine sand in a weight ratio of 1:1, the fineness modulus of the machine-made sand is 3.2, and the fineness modulus of the superfine sand is 1.1.
6. The application of the slag iron tailings of claim 1 in concrete is characterized in that: the type of the cement is P.O 42.5.
7. The application of the slag iron tailings of claim 1 in concrete is characterized in that: also included are polyurethane particles; the weight component of the polyurethane particles is 30-50; the diameter of the polyurethane particles is 0.3-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110289.1A CN111018433A (en) | 2019-11-14 | 2019-11-14 | Application of tailings of iron separation from slag in concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110289.1A CN111018433A (en) | 2019-11-14 | 2019-11-14 | Application of tailings of iron separation from slag in concrete |
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| CN111018433A true CN111018433A (en) | 2020-04-17 |
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| CN201911110289.1A Pending CN111018433A (en) | 2019-11-14 | 2019-11-14 | Application of tailings of iron separation from slag in concrete |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182141A (en) * | 2007-11-14 | 2008-05-21 | 北京科技大学 | Method for preparing high-strength structure material by using iron tailings |
| CN102603248A (en) * | 2012-03-23 | 2012-07-25 | 北京建筑工程学院 | Tailing sand mortar dry blend and mortar preparation method thereby |
| CN104261733A (en) * | 2014-09-02 | 2015-01-07 | 金科 | High-strength concrete and preparation method thereof |
| WO2015068064A1 (en) * | 2013-10-28 | 2015-05-14 | Anglogold Ashanti Limited | A concrete composition comprising metallurgical tailings derived from mining process |
| CN105036621A (en) * | 2015-07-02 | 2015-11-11 | 中国十七冶集团有限公司 | High-strength superfine iron tailing mixed sand concrete |
-
2019
- 2019-11-14 CN CN201911110289.1A patent/CN111018433A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101182141A (en) * | 2007-11-14 | 2008-05-21 | 北京科技大学 | Method for preparing high-strength structure material by using iron tailings |
| CN102603248A (en) * | 2012-03-23 | 2012-07-25 | 北京建筑工程学院 | Tailing sand mortar dry blend and mortar preparation method thereby |
| WO2015068064A1 (en) * | 2013-10-28 | 2015-05-14 | Anglogold Ashanti Limited | A concrete composition comprising metallurgical tailings derived from mining process |
| CN104261733A (en) * | 2014-09-02 | 2015-01-07 | 金科 | High-strength concrete and preparation method thereof |
| CN105036621A (en) * | 2015-07-02 | 2015-11-11 | 中国十七冶集团有限公司 | High-strength superfine iron tailing mixed sand concrete |
Non-Patent Citations (3)
| Title |
|---|
| 于洪浩等: ""铁尾矿碱浸出过程动力学"", 《材料与冶金学报》 * |
| 唐可等: ""掺铁尾矿砂细集料的水泥混凝土性能分析"", 《工业建筑》 * |
| 雷文: "《材料成型与加工实验教程》", 31 May 2017, 东南大学出版社 * |
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Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |