CN113213827A - High-content steel slag micro powder based steel slag aggregate basalt fiber composite material - Google Patents
High-content steel slag micro powder based steel slag aggregate basalt fiber composite material Download PDFInfo
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- CN113213827A CN113213827A CN202110515912.2A CN202110515912A CN113213827A CN 113213827 A CN113213827 A CN 113213827A CN 202110515912 A CN202110515912 A CN 202110515912A CN 113213827 A CN113213827 A CN 113213827A
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- steel slag
- basalt fiber
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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
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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
- 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
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- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a steel slag micro powder-based steel slag aggregate and basalt fiber composite material with high content, which comprises 50 parts of steel slag micro powder, 50 parts of cement, 230-280 parts of steel slag, 1 part of water reducing agent, 1-2 parts of basalt fiber and 30 parts of water. The sum of the weight parts of the steel slag micro powder, the steel slag and the basalt fiber is 77.6 to 80.3 percent of the weight of the whole composite material. The invention is characterized in that the industrial solid waste utilization is high, the steel slag micro powder accounts for 50 percent of the whole cementing material, the steel slag accounts for 100 percent of the aggregate of the composite material, and the doped fiber is green and environment-friendly basalt fiber for improving the toughness. The weight of the prepared composite material, industrial solid waste material and environment-friendly material is 77.6-80.3% higher than that of the whole material. On the premise of meeting the performance, the composite material has great economic benefit and social benefit.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a composite building material which takes high-content steel slag micro powder as a cementing material, takes steel slag as a unique filling material and is toughened by doping basalt fibers.
Background
Steel slag is a by-product of steel-making from steel-iron ore, and it accounts for about 15% of the total steel production. With the continuous improvement of the steelmaking technology in the 21 st century, the mass production of steel products can rapidly improve the yield of steel slag. The steel slag is used as industrial waste and needs to be disposed urgently, huge land space is occupied when the waste is dumped or buried randomly, adverse influence is certainly caused to the ecological environment of an occupied area, and the problem is a troublesome problem to be faced by the steel industry.
The components of the steel slag change along with the change of the mineral components of the raw materials, but most of the steel slag is rich in latent hydraulic chemical components, such as tricalcium silicate, dicalcium silicate, tetracalcium aluminoferrite, calcium ferrite and the like, and when the alkalinity of the steel slag is more than 1.8, the steel slag has the performance similar to that of cement, so that the steel slag has the possibility of replacing the cement as a cementing material. In addition, the steel slag contains 35-60% CaO and 10-15% SiO by mass2The two chemical components have certain strength and can be used as a filling material for improving the strength in the composite material. The two characteristics show that the steel slag can be used as a raw material of a novel green building material prepared by utilizing solid wastes.
Disclosure of Invention
The invention aims to provide a high-content steel slag micro powder-based steel slag aggregate basalt fiber composite material which is high in industrial solid waste utilization, energy-saving and environment-friendly, and has great economic and social benefits by improving and optimizing the performance.
In order to achieve the purpose, the invention provides the following technical scheme: the high-doping-amount steel slag micro powder-based steel slag aggregate and basalt fiber composite material comprises 50 parts of steel slag micro powder, 50 parts of cement, 230-280 parts of steel slag, 1 part of a water reducing agent, 1-2 parts of basalt fiber and 30 parts of water.
Preferably, the sum of the weight parts of the steel slag micro powder, the steel slag and the basalt fiber is 77.6 to 80.3 percent of the weight of the whole composite material.
The invention also provides a preparation method of the high-content steel slag micro powder-based steel slag aggregate and basalt fiber composite material, which comprises the steps of sequentially putting the steel slag micro powder, the cement and the steel slag into a stirrer to be stirred for 1-2 minutes, then putting the basalt fiber into the stirrer to be continuously stirred for 1-2 minutes; at the moment, water mixed with the water reducing agent is slowly poured into the stirring container along the container wall, and after stirring for 1-2 minutes, the water reducing agent and water react with the dry materials fully; gradually changing the stirred material into a wet state, increasing the stirring speed at the moment, and continuously stirring for 1-2 minutes until the stirred material is completely piled;
the slow rotating speed of the stirring barrel is controlled to be 60-80 revolutions per minute, and the fast rotating speed is limited to be 180-240 revolutions per minute; pouring the mixture into a mould, forming, maintaining at 25 ℃ and 95% humidity for 56 days, and removing the mould to finally obtain the steel slag micropowder-based steel slag aggregate and basalt fiber composite material
Compared with the prior art, the invention has the beneficial effects that: the invention is characterized in that the industrial solid waste utilization is high, the steel slag micro powder accounts for 50 percent of the whole cementing material, the steel slag accounts for 100 percent of the aggregate of the composite material, and in order to improve the toughness, the basalt fiber which is one of four fibers (carbon fiber, aramid fiber, ultra-high molecular weight polyethylene and basalt fiber) listed as important development in China and is green and environment-friendly is added. The weight of the prepared composite material, industrial solid waste material and environment-friendly material is 77.6-80.3% higher than that of the whole material. The strength of the cubic test piece prepared according to the mix proportion design of the invention is superior to that of a comparative example designed according to the mix proportion of C30 concrete under the same curing condition and age, and the compressive strength is up to 35MPa and the split tensile strength is up to 4 MPa. On the premise of meeting the performance, the composite material not only saves increasingly scarce natural resources such as sand and stone, replaces half of high-energy-consumption resource cement, but also greatly slows down the occupation of the steel slag on a stacking site, protects the ecological environment and has great economic and social benefits.
Drawings
FIG. 1 is a schematic representation of the compressive strength of a cube of the present invention.
FIG. 2 is a schematic representation of the cubic split tensile strength of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
Referring to fig. 1-2, the present invention provides a technical solution: the high-doping-amount steel slag micro powder-based steel slag aggregate and basalt fiber composite material comprises 50 parts of steel slag micro powder, 50 parts of cement, 230-280 parts of steel slag, 1 part of a water reducing agent, 1-2 parts of basalt fiber and 30 parts of water, wherein the parts are in parts by mass; the granularity of the steel slag micro powder is 425 meshes; surface area greater than 390m2Per kg; the 45 mu m sieve residue is less than 2 percent. The cement is P.O42.5 Portland cement. The steel slag aggregate is converter steel slag with the granularity of 80 meshes. The steel slag micro powder has tricalcium silicate as main mineral component and dicalcium silicate as secondary mineral component, and after fine grinding, the steel slag micro powder has good performance in hydration and activity and can be used as a cementing material, and the higher the fineness is, the better the hydration and the activity are. The fineness of the steel slag micro powder selected by the invention is very high, reaches 425 meshes, and can completely replace part of cement. The steel slag contains 35-60% CaO and 10-15% SiO2The two chemical components have certain strength and can be used as a filling material for improving the strength in the composite material. Table 1 shows the steel slag micro powder and the chemical components of the steel slag used this time.
Table 1 shows the steel slag micro powder and the chemical composition of the steel slag
The basalt fiber has a length of 6mm, a thickness of 20 μm and an ultimate tensile strength of 1890 MPa. The basalt fiber is doped to play a role in preventing the crack development of the composite material, so that the overall toughness of the material is improved, and the compression resistance and the tensile resistance are improved. The water reducing agent is a naphthalene water reducing agent, also called as FDN water reducing agent, and the main component is a sodium beta-naphthalenesulfonate formaldehyde condensate. It has strong dispersing action on cement particles, can comprehensively improve or improve the performance of materials, and is an effective admixture for preparing high-performance concrete. The mixing amount is 2% of the cement dosage, and the water reducing rate is 18% -28%.
In the components of the integral material, the steel slag micro powder and the steel slag are called industrial solid waste materials, and the basalt fiber is called green environment-friendly materials. The sum of the weight parts of the steel slag micro powder, the steel slag and the basalt fiber is 77.6 to 80.3 percent of the weight of the whole composite material. Because the used materials are industrial solid waste materials or green environment-friendly materials in a large proportion, the effects of utilizing wastes and changing wastes into valuables are realized.
The invention also provides a preparation method of the high-content steel slag micro powder-based steel slag aggregate basalt fiber composite material, which comprises the following steps: sequentially putting the steel slag micro powder, the cement and the steel slag into a stirrer to be stirred for 1-2 minutes, then putting the basalt fiber into the stirrer to be continuously stirred for 1-2 minutes; at the moment, water mixed with the water reducing agent is slowly poured along the wall of the stirring container, and is stirred and poured at the same time, the effect of slowly pouring is that the stirred materials are not condensed and are not uniform to form blocks, and the materials are continuously stirred after being completely poured, and the mixed materials are dry at the beginning and are in a water shortage state visually. After stirring for 1-2 minutes, fully reacting the water reducing agent with water and dry materials; and gradually changing the stirred material into a wet state, increasing the stirring speed at the moment, continuously stirring for 1-2 minutes, and waiting until the stirred material is completely piled.
The slow rotating speed of the stirring barrel is controlled to be 60-80 revolutions per minute, the fast rotating speed is limited to be 180-240 revolutions per minute, whether fibers are agglomerated or not is carefully observed during stirring, and if necessary, an iron rod with the diameter of 4-6mm is used for manually stirring. Pouring the mixture into a mould, forming, maintaining at 25 ℃ and 95% humidity for 56 days, and removing the mould to obtain the steel slag micro powder based steel slag aggregate basalt fiber composite material.
Example 1
50 parts of steel slag micro powder, 50 parts of cement, 280 parts of steel slag, 1 part of water reducing agent, 1 part of basalt fiber and 30 parts of water. The weight of the industrial solid waste material and the green environment-friendly material accounts for 80.3 percent of the weight of the whole composite material. Wherein, the steel slag micro powder and the steel slag as industrial solid waste materials account for 80.1 percent of the weight of the whole material. The cement as a high energy consumption material accounts for 12.1 percent of the weight of the whole composite material.
After weighing the materials, sequentially putting the steel slag micro powder, the cement and the steel slag into a stirrer to be stirred for 1-2 minutes, then putting the basalt fiber into the stirrer to be continuously stirred for 1-2 minutes. And finally, slowly pouring the water mixed with the FDN water reducing agent into the stirring container along the container wall. And after stirring for 1-2 minutes approximately, the water reducing agent and water are fully reacted with the dry materials. And gradually changing the stirred material into a wet state, increasing the stirring speed at the moment, continuously stirring for 1-2 minutes, and waiting until the stirred material is completely piled. Among the above stirring speeds, the slow speed should be controlled to be 60-80 rpm, and the fast speed should be limited to be 180-240 rpm. Carefully observing whether the fibers are agglomerated during stirring, and manually stirring by using an iron rod with the diameter of 4-6mm if necessary. And pouring the lumpy mixture into a mold. After molding, the mold was removed after curing at 25 ℃ and 95% humidity for 56 days. Finally obtaining the steel slag micro powder based steel slag aggregate basalt fiber composite material.
The cubic compression strength of the material is 35.2MPa, and the cubic splitting tensile strength of the material is 4.03 MPa.
Example 2
50 parts of steel slag micro powder, 50 parts of cement, 250 parts of steel slag, 1 part of water reducing agent, 2 parts of basalt fiber and 30 parts of water. The weight of the industrial solid waste material and the green environment-friendly material accounts for 78.9 percent of the weight of the whole composite material. Wherein, the steel slag micro powder and the steel slag as industrial solid waste materials account for 78.3 percent of the weight of the whole material. The cement is used as a high energy consumption material and accounts for 13.1 percent of the weight of the whole composite material.
The manufacturing method is the same as in example 1. The cubic compressive strength of the test piece is 37.6MPa, and the cubic splitting tensile strength is 4.59 MPa.
Example 3
50 parts of steel slag micro powder, 50 parts of cement, 230 parts of steel slag, 1 part of water reducing agent, 1 part of basalt fiber and 30 parts of water. The industrial solid waste and green environment-friendly material accounts for 77.6 percent of the weight of the whole composite material. Wherein, the steel slag micro powder and the steel slag as industrial solid waste materials account for 77.3 percent of the weight of the whole material. The cement is used as a high energy consumption material and accounts for 13.8 percent of the weight of the whole composite material.
The manufacturing method is the same as in example 1. The cubic compression strength of the material is 43.2MPa, and the cubic splitting tensile strength of the material is 4.52 MPa.
Example 4
50 parts of steel slag micro powder, 50 parts of cement, 230 parts of steel slag, 1 part of water reducing agent, 2 parts of basalt fiber and 30 parts of water. The industrial solid waste and green environment-friendly material accounts for 77.7 percent of the weight of the whole composite material. Wherein, the steel slag micro powder and the steel slag as industrial solid waste materials account for 77.1 percent of the weight of the whole material. The cement is used as a high energy consumption material and accounts for 13.8 percent of the weight of the whole composite material.
The manufacturing method is the same as in example 1. The cubic compressive strength of the material is 42.8MPa, and the cubic splitting tensile strength of the material is 4.71 MPa.
Comparative example 1
100 parts of cement, 140 parts of river sand, 310 parts of stones, 1 part of water reducing agent, 2 parts of basalt fibers and 30 parts of water. No industrial solid waste material. The green environment-friendly material basalt fiber accounts for 0.3 percent of the weight of the whole material. The cement is 20.7 percent of the weight of the whole material as a high energy consumption material.
Test pieces were made using the same die size and cured for 56 days. The cubic compressive strength is measured to be 28.9MPa, and the cubic splitting tensile strength is measured to be 3.62 MPa.
Comparative example 2
100 parts of cement, 110 parts of river sand, 270 parts of stones and 30 parts of water. No industrial solid waste and green environment-friendly materials. The cement is 19.6 percent of the weight of the whole material as a high energy consumption material.
Test pieces were made using the same die size and cured for 56 days. Through actual measurement, the cubic compressive strength is 30.8MPa, and the cubic splitting tensile strength is 2.95 MPa.
Comparative example 3
100 parts of cement, 100 parts of river sand, 250 parts of stones, 1 part of water reducing agent, 2 parts of basalt fibers and 30 parts of water. No industrial solid waste material. The green environment-friendly material basalt fiber accounts for 0.3 percent of the weight of the whole material. The cement is 20.7 percent of the weight of the whole material as a high energy consumption material.
Test pieces were made using the same die size and cured for 56 days. The cubic compressive strength is 33.6MPa and the cubic splitting tensile strength is 3.81 MPa.
Claims (8)
1. A high-content steel slag micro powder-based steel slag aggregate basalt fiber composite material is characterized in that: the steel slag water reducing agent comprises 50 parts of steel slag micro powder, 50 parts of cement, 230-280 parts of steel slag, 1 part of water reducing agent, 1-2 parts of basalt fiber and 30 parts of water.
2. The high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized in that: the sum of the weight parts of the steel slag micro powder, the steel slag and the basalt fiber is 77.6 to 80.3 percent of the weight of the whole composite material.
3. The high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized in that: the granularity of the steel slag micro powder is 425 meshes; surface area greater than 390m2Per kg; the 45 mu m sieve residue is less than 2 percent.
4. The high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized in that: the cement is P.O42.5 Portland cement.
5. The high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized in that: the steel slag aggregate is converter steel slag with the granularity of 80 meshes.
6. The high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized in that: the length of the basalt fiber is 6mm, the thickness is 20 mu m, and the ultimate tensile strength is 1890 MPa.
7. The high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized in that: the water reducing agent is a naphthalene water reducing agent.
8. The preparation method of the high-content steel slag micropowder-based steel slag aggregate basalt fiber composite material as claimed in claim 1, is characterized by comprising the following steps: sequentially putting the steel slag micro powder, the cement and the steel slag into a stirrer to be stirred for 1-2 minutes, then putting the basalt fiber into the stirrer to be continuously stirred for 1-2 minutes; at the moment, water mixed with the water reducing agent is slowly poured into the stirring container along the container wall, and after stirring for 1-2 minutes, the water reducing agent and water react with the dry materials fully; gradually changing the stirred material into a wet state, increasing the stirring speed at the moment, and continuously stirring for 1-2 minutes until the stirred material is completely piled;
the slow rotating speed of the stirring barrel is controlled to be 60-80 revolutions per minute, and the fast rotating speed is limited to be 180-240 revolutions per minute; pouring the mixture into a mould, forming, maintaining at 25 ℃ and 95% humidity for 56 days, and removing the mould to obtain the steel slag micro powder based steel slag aggregate basalt fiber composite material.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423362A (en) * | 2008-11-21 | 2009-05-06 | 中冶宝钢技术服务有限公司 | Steel slag polymer cement mortar |
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- 2021-05-12 CN CN202110515912.2A patent/CN113213827A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101423362A (en) * | 2008-11-21 | 2009-05-06 | 中冶宝钢技术服务有限公司 | Steel slag polymer cement mortar |
Non-Patent Citations (2)
| Title |
|---|
| 何良玉等: "钢渣作胶凝材料和细集料制备高性能砂浆的研究", 《矿产综合利用》 * |
| 李岩等: "钢渣粉对玄武岩纤维混凝土7d和28d压拉性能影响的试验分析", 《科学技术与工程》 * |
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Application publication date: 20210806 |