CN109608075B - High-titanium blast furnace slag composite admixture micro powder and preparation method thereof - Google Patents
High-titanium blast furnace slag composite admixture micro powder and preparation method thereof Download PDFInfo
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- CN109608075B CN109608075B CN201811582851.6A CN201811582851A CN109608075B CN 109608075 B CN109608075 B CN 109608075B CN 201811582851 A CN201811582851 A CN 201811582851A CN 109608075 B CN109608075 B CN 109608075B
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- furnace slag
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The invention belongs to the technical field of building materials, and particularly relates to high-titanium blast furnace slag composite admixture micro powder and a preparation method thereof. Aiming at the problems that the activity and the bleeding performance of the existing high-titanium blast furnace slag are poor and the existing high-titanium blast furnace slag cannot be directly utilized in building concrete, the invention provides high-titanium blast furnace slag composite admixture micro powder, which comprises the following components in percentage by weight: by weight percentage, 40-55% of high titanium blast furnace slag, 35-50% of converter steel slag and 10-30% of limestone; the raw materials are weighed according to the proportion, ball-milled to a certain granularity and mixed evenly. The composite admixture micro powder has better activity and water retention property, and can meet the requirement of JB/T486-2015 to play the role of an admixture in building concrete. In addition, the invention also provides a preparation method of the composite admixture micro powder, which is prepared by mixing the materials in proportion and then ball-milling the mixture to the corresponding granularity. The preparation method is simple, has excellent performance and is suitable for popularization and use.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to high-titanium blast furnace slag composite admixture micro powder and a preparation method thereof.
Background
The high titanium blast furnace slag is a smelting slag generated in the smelting process of vanadium titano-magnetite, wherein a large amount of titanium dioxide and calcium oxide are combined into perovskite at high temperature, and due to the stable structure and the large apparent density of the calcium and titanium, if the ground micro powder is directly applied to concrete, the phenomena of poor activity, bleeding, segregation and the like exist, the construction performance of the concrete is influenced, and the workability in the construction performance can not meet the construction requirement.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the prior high titanium blast furnace slag has poor activity and bleeding performance and can not be directly utilized in building concrete.
The technical scheme for solving the technical problems comprises the following steps: provides high titanium blast furnace slag composite admixture micro powder. The composition comprises: the high titanium blast furnace slag comprises, by weight, 40-55% of high titanium blast furnace slag, 35-50% of converter steel slag and 10-30% of limestone.
In the high-titanium blast furnace slag composite admixture micro powder, the high-titanium blast furnace slag comprises 20-30% of calcium oxide, 19-23% of titanium dioxide, 17-20% of silicon oxide and 9-16% of aluminum oxide.
Furthermore, in the high titanium blast furnace slag composite admixture micro powder, the granularity of the high titanium blast furnace slag is less than or equal to 5mm, and the water content is less than or equal to 1%.
In the high titanium blast furnace slag composite admixture micropowder, the converter steel slag contains 38-45% of calcium oxide, 12-16% of silicon oxide, 5-12% of magnesium oxide and less than or equal to 20% of total iron.
In the high titanium blast furnace slag composite admixture micro powder, the granularity of the converter steel slag is less than or equal to 50mm, and the water content is less than or equal to 1%.
Wherein, in the high titanium blast furnace slag composite admixture micro powder, the limestone is limestone with calcium carbonate content more than or equal to 75 percent.
In the high titanium blast furnace slag composite admixture micro powder, the particle size of the limestone is less than or equal to 50mm, and the water content is less than or equal to 1%.
The invention also provides a preparation method of the high titanium blast furnace slag composite admixture micro powder, which comprises the following steps:
mixing high-titanium blast furnace slag, converter steel slag and limestone according to a certain mass ratio, grinding until the oversize material with the particle size of 45 mu m is less than or equal to 20%, and uniformly mixing.
Further, in the preparation method of the high titanium blast furnace slag composite admixture micro powder, the grinding adopts a ball mill or a vertical mill.
The high titanium blast furnace slag composite admixture micro powder prepared by the method is directly mixed into concrete according to the standard of common II-level composite admixture and is used for building construction.
The invention has the beneficial effects that:
the invention provides high-titanium blast furnace slag composite admixture micro powder, which is prepared by mixing high-titanium blast furnace slag, converter steel slag and limestone according to a specific proportion, wherein the high-titanium blast furnace slag plays a filling role, the converter steel slag can improve an activity index, the limestone can improve water retention and prevent a bleeding phenomenon, and finally the composite admixture micro powder disclosed by the invention has better activity and water retention and can meet the JB/T486-2015 requirement and play an admixture role in building concrete. In addition, the invention also provides a preparation method of the composite admixture micro powder, which is prepared by mixing the materials in proportion and then ball-milling the mixture to the corresponding granularity. The preparation method is simple, has excellent performance and is suitable for popularization and use.
Detailed Description
The invention provides high-titanium blast furnace slag composite admixture micro powder, which comprises the following components: the high titanium blast furnace slag comprises, by weight, 40-55% of high titanium blast furnace slag, 35-50% of converter steel slag and 10-30% of limestone.
The composite admixture micropowder is prepared by matching the high-titanium blast furnace slag, the converter steel slag and the limestone, and is mainly determined by experiments, and the three raw materials can supplement each other after being mixed according to a certain proportion, so that a better water retention effect is achieved. The high titanium blast furnace slag mainly plays a filling role, and the excessive high titanium blast furnace slag addition can cause concrete segregation and bleeding and influence normal construction; the addition amount of the high titanium type blast furnace slag is too low, which is not economical and cannot utilize the high titanium type blast furnace slag to the maximum extent. The converter steel slag mainly plays a role in improving the activity index, and the limestone can improve the water retention property and prevent the bleeding phenomenon. Through the reasonable matching of the three raw materials, the composite admixture micro powder provided by the invention has better activity and water retention property.
In the high titanium blast furnace slag composite admixture micro powder, for better filling effect, the high titanium blast furnace slag is blast furnace slag with 20-30% of calcium oxide, 19-23% of titanium dioxide, 17-20% of silicon oxide and 9-16% of aluminum oxide.
Furthermore, in the high titanium blast furnace slag composite admixture micro powder, in order to achieve better filling effect, the particle size of the high titanium blast furnace slag is less than or equal to 5mm, and the water content is less than or equal to 1%.
In the high titanium blast furnace slag composite admixture micro powder, in order to improve the activity better, the converter steel slag comprises 38-45% of calcium oxide, 12-16% of silicon oxide, 5-12% of magnesium oxide and less than or equal to 20% of total iron.
In the high titanium blast furnace slag composite admixture micro powder, the granularity of the converter steel slag is less than or equal to 50mm, and the water content is less than or equal to 1%.
In the high titanium blast furnace slag composite admixture micro powder, in order to prevent the generation of a bleeding phenomenon, the limestone is limestone with the calcium carbonate content being more than or equal to 75 percent.
In the high titanium blast furnace slag composite admixture micro powder, the particle size of the limestone is less than or equal to 50mm, and the water content is less than or equal to 1%.
The invention also provides a preparation method of the high titanium blast furnace slag composite admixture micro powder, which comprises the following steps:
mixing high-titanium blast furnace slag, converter steel slag and limestone according to a certain mass ratio, grinding until the oversize material with the particle size of 45 mu m is less than or equal to 20%, and uniformly mixing.
Further, in the preparation method of the high titanium blast furnace slag composite admixture micro powder, the grinding adopts a ball mill or a vertical mill.
The following examples are intended to illustrate specific embodiments of the present invention without limiting the scope of the invention to the examples.
The high titanium type blast furnace slag used in the examples and comparative examples had the composition: 25.4 percent of calcium oxide, 21.6 percent of titanium dioxide, 19.2 percent of silicon oxide and 12.5 percent of alumina; the granularity is less than or equal to 5mm, and the water content is 0.85 percent;
the converter steel slag comprises 42.5 percent of calcium oxide, 15.6 percent of silicon oxide, 7.5 percent of magnesium oxide and 18.2 percent of total iron; the granularity is less than or equal to 50mm, and the water content is 0.68 percent;
the limestone comprises 79.5 percent of calcium carbonate. The granularity is less than or equal to 50mm, and the water content is 0.75 percent.
Example 1 preparation of high titanium blast furnace slag composite admixture micropowder of the present invention
The specific operation steps are as follows:
weighing 4kg of high-titanium blast furnace slag, 5kg of converter steel slag and 1kg of limestone, adding the materials into a ball mill, ball-milling until the fineness is less than 20% (45 mu m of screen residue, mass fraction), and uniformly mixing.
The performance of the high titanium blast furnace slag composite admixture micro-powder obtained in the example 1 is detected, and the detection method refers to JB/T486-2015, so that the result meets the requirement of JB/T486-2015.
The high titanium blast furnace slag composite admixture obtained in the example 1 is adopted for concrete trial preparation, and the workability of the admixture meets the construction performance requirement.
Example 2 preparation of high titanium blast furnace slag composite admixture micropowder of the present invention
The specific operation steps are as follows:
weighing 4.5kg of high-titanium blast furnace slag, 4kg of converter steel slag and 1.5kg of limestone, adding the materials into a ball mill, ball-milling until the fineness is less than 20% (45 mu m of screen residue and mass fraction), and uniformly mixing.
And (3) carrying out performance detection on the high-titanium blast furnace slag composite admixture micro-powder obtained in the example 2, wherein the detection method refers to JB/T486-2015, and the result meets the requirement of JB/T486-2015.
The high titanium blast furnace slag composite admixture obtained in the embodiment 2 is adopted for concrete trial preparation, and the workability of the admixture meets the construction performance requirement.
Example 3 preparation of high titanium blast furnace slag composite admixture micropowder of the present invention
The specific operation steps are as follows:
weighing 5kg of high-titanium blast furnace slag, 3kg of converter steel slag and 2kg of limestone, adding the materials into a ball mill, ball-milling until the fineness is less than 20% (45 mu m of screen residue, mass fraction), and uniformly mixing.
And (3) carrying out performance detection on the high-titanium blast furnace slag composite admixture micro-powder obtained in the example 3, wherein the detection method refers to JB/T486-2015, and the result meets the requirement of JB/T486-2015.
The high titanium blast furnace slag composite admixture obtained in the embodiment 3 is adopted for concrete trial preparation, and the workability of the admixture meets the construction performance requirement.
Comparative example 4 preparation of high titanium blast furnace slag composite admixture micropowder without Using the method of the present invention
The specific operation steps are as follows:
weighing 6kg of high-titanium blast furnace slag, 3kg of converter steel slag and 1kg of limestone, adding the materials into a ball mill, ball-milling until the fineness is less than 20% (45 mu m of screen residue, mass fraction), and uniformly mixing.
The performance of the high titanium type blast furnace slag micro powder obtained in the comparative example 4 is detected, and the detection method refers to JB/T486-2015, and the 28d activity index of the high titanium type blast furnace slag micro powder is only 62 percent and cannot meet the requirement.
When the high titanium blast furnace slag composite admixture obtained in the comparative example 4 is adopted for concrete trial preparation, the bleeding phenomenon exists, and the requirements of the concrete construction performance can not be met.
Comparative example 5 preparation of high titanium blast furnace slag composite admixture micropowder without Using the method of the present invention
The specific operation steps are as follows:
weighing 3kg of high-titanium blast furnace slag, 3kg of converter steel slag and 4kg of limestone, adding the materials into a ball mill, ball-milling until the fineness is less than 20% (45 mu m of screen residue, mass fraction), and uniformly mixing.
The performance of the high titanium type blast furnace slag micro powder obtained in the comparative example 5 is detected, and the 28d activity index of the detection method is only 60% according to JB/T486-2015, so that the requirement cannot be met.
When the high titanium blast furnace slag composite admixture obtained in the comparative example 5 is adopted for concrete trial preparation, the segregation phenomenon exists, and the concrete construction performance requirement cannot be met.
Therefore, the high-titanium blast furnace slag composite admixture is prepared by compounding the high-titanium blast furnace slag, the converter steel slag and the limestone, and the high-titanium blast furnace slag composite admixture is prepared by reasonably adjusting the mixture ratio of the high-titanium blast furnace slag, the converter steel slag and the limestone to 40-55%, 35-50% and 10-30%, so that the activity and the water retention property of the composite admixture micropowder are improved, and the requirements of JB/T486-2015 can be met. When the mixture ratio of the raw materials is out of the range of the invention, the requirement of JB/T486-2015 cannot be met. The invention makes full use of the high titanium blast furnace slag, reduces the cost and is suitable for popularization and use.
Claims (9)
1. The high titanium blast furnace slag composite admixture micro powder is characterized by comprising the following components: by weight percentage, 40-55% of high titanium blast furnace slag, 35-50% of converter steel slag and 10-30% of limestone; the sum of the raw materials is hundred percent.
2. The high titanium blast furnace slag composite admixture micro powder as claimed in claim 1, characterized in that: the high-titanium blast furnace slag comprises 20-30% of calcium oxide, 19-23% of titanium dioxide, 17-20% of silicon oxide and 9-16% of aluminum oxide.
3. The high titanium blast furnace slag composite admixture micro powder as claimed in claim 1, characterized in that: the granularity of the high-titanium blast furnace slag is less than or equal to 5mm, and the water content is less than or equal to 1%.
4. The high titanium blast furnace slag composite admixture micro powder as claimed in claim 1, characterized in that: the converter steel slag comprises 38-45% of calcium oxide, 12-16% of silicon oxide, 5-12% of magnesium oxide and less than or equal to 20% of total iron.
5. The high titanium blast furnace slag composite admixture micro powder as claimed in claim 1, characterized in that: the granularity of the converter steel slag is less than or equal to 50mm, and the water content is less than or equal to 1%.
6. The high titanium blast furnace slag composite admixture micro powder as claimed in claim 1, characterized in that: the limestone is limestone with calcium carbonate content not less than 75%.
7. The high titanium blast furnace slag composite admixture micro powder as claimed in claim 1, characterized in that: the limestone particle size is less than or equal to 50mm, and the water content is less than or equal to 1%.
8. The method for preparing the high titanium blast furnace slag composite admixture micro powder as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
mixing high-titanium blast furnace slag, converter steel slag and limestone according to a certain mass ratio, grinding until the oversize material with the particle size of 45 mu m is less than or equal to 20%, and uniformly mixing.
9. The method for preparing the high titanium blast furnace slag composite admixture micro powder according to claim 8, which is characterized in that: the grinding adopts a ball mill or a vertical mill.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500758A (en) * | 2002-11-15 | 2004-06-02 | 攀枝花环业冶金渣开发有限责任公司 | Blast furnace titanium slag compounded micro powder used in cement, concrete and mortar |
| WO2014175294A1 (en) * | 2013-04-24 | 2014-10-30 | 株式会社トクヤマ | Improved-fluidity cement clinker |
| CN104446201A (en) * | 2014-11-25 | 2015-03-25 | 攀枝花环业冶金渣开发有限责任公司 | Foam concrete and preparation method thereof |
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2018
- 2018-12-24 CN CN201811582851.6A patent/CN109608075B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500758A (en) * | 2002-11-15 | 2004-06-02 | 攀枝花环业冶金渣开发有限责任公司 | Blast furnace titanium slag compounded micro powder used in cement, concrete and mortar |
| WO2014175294A1 (en) * | 2013-04-24 | 2014-10-30 | 株式会社トクヤマ | Improved-fluidity cement clinker |
| CN104446201A (en) * | 2014-11-25 | 2015-03-25 | 攀枝花环业冶金渣开发有限责任公司 | Foam concrete and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| "钢渣粉和石灰石粉制备混凝土复合掺合料的研究";崔红军;《水泥生产》;20171231;10-11 * |
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