CN112500071A - Copper slag-based high-fracture-resistance wear-resistant pavement repair material and preparation method thereof - Google Patents
Copper slag-based high-fracture-resistance wear-resistant pavement repair material and preparation method thereof Download PDFInfo
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- CN112500071A CN112500071A CN202011410994.6A CN202011410994A CN112500071A CN 112500071 A CN112500071 A CN 112500071A CN 202011410994 A CN202011410994 A CN 202011410994A CN 112500071 A CN112500071 A CN 112500071A
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- copper slag
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- repair material
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Road Paving Structures (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention provides a copper slag-based high-fracture-resistance wear-resistant pavement repair material and a preparation method thereof, wherein the copper slag-based high-fracture-resistance wear-resistant pavement repair material comprises the following components in percentage by mass: cement: 30-50%, copper slag: 15-35%, interface reinforcing agent: 5-15%, dispersion stabilizer: 0.1-0.5%, and the balance of water. The copper slag-based high-breaking-resistance wear-resistant pavement repair material has the characteristics of high breaking strength, good wear resistance and the like. Wherein the copper slag can partially replace cement, when 20-40% of the cement is replaced, the 28d flexural strength of the cement mortar reaches more than 7.0MPa, and the 28d abrasion loss is less than 2.5kg/m2. The method can be regarded as an effective means for improving the added value of the solid waste, and has a good popularization prospect in the aspect of resource utilization of the solid waste.
Description
Technical Field
The invention relates to the technical field of pavement repair materials, in particular to a copper slag-based high-fracture-resistance wear-resistant pavement repair material and a preparation method thereof.
Background
China has become the world with the largest cement yield, the national cement yield reaches 23.48 hundred million tons only in 2015, and the concrete yield accounts for more than half of the total world yield. CO discharged by cement production worldwide every year2About 20 hundred million tons accounts for 6 to 7 percent of the total carbon emission, and simultaneously, a large amount of NO, CO and the like are generated, thereby bringing about a serious environmental pollution problem. The copper slag is solid waste generated in the copper smelting process, and 2-3 t of copper slag can be generated every 1t of copper is produced. At present, the comprehensive utilization rate of copper slag is low, and stacking is mainly used. With the rapid development of modern economy in China, the demand of copper metal is only higher and higher, the yield of copper slag is also higher and higher, and if the copper slag is piled up for a long time, a large amount of land is occupied, and toxic metal elements in the copper slag are dissolved out, enter soil and flow into rivers to cause secondary environmental pollution. Therefore, how to effectively utilize these industrial copper slags becomes important. The steel slag is solid waste in the ferrous metallurgy industry, and the quantity of the steel slag is continuously increased along with the continuous development of the current ferrous industry, so that the steel slag not only occupies a large amount of land and causes serious pollution to the environment, but also brings potential harm to the production and life of people.
The common problem of the cement concrete pavement is that the cement concrete pavement is subjected to minor repair in three years and major repair in five years, which becomes the focus of people for talking about the Chinese highway, mainly because the cement concrete pavement is subjected to overload operation for a long time and is insufficient in wear resistance.
Disclosure of Invention
In view of the above, the invention aims to provide a new scheme for improving the wear resistance of a cement concrete pavement, namely, copper slag is added into cement, and then an interface reinforcing agent is added to prepare a copper slag-based high-breaking-resistance wear-resistance pavement repairing material, so that the problem of insufficient wear resistance of the cement concrete pavement is effectively solved, and meanwhile, the copper slag is applied to the cement, so that a new green cement-based material can be developed, the utilization rate of the copper slag is improved, the copper slag-based high-breaking-resistance wear-resistance pavement repairing material is beneficial to economy, environment and urban construction, and the sustainable development of economy, resources and environment in copper smelting areas is realized.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a copper slag-based high-fracture-resistance wear-resistant pavement repair material comprises the following components in percentage by mass: cement: 30-50%, copper slag: 15-35%, interface reinforcing agent: 5-15%, dispersion stabilizer: 0.1-0.5%, and the balance of water.
Optionally, the interfacial enhancer is an interfacial enhancer prepared by the following method:
and drying and grinding the crushed steel slag, and then carrying out wet grinding treatment until the median particle size of the steel slag is 2-4 μm to obtain the interface reinforcing agent.
Optionally, a dispersion stabilizer is added in the wet grinding treatment process; the mass ratio of the steel slag, the dispersion stabilizer and the water in the wet grinding treatment is 1: 0.1: 2.
Optionally, the wet-milling treated abrasive body is a zirconia abrasive body; the grading of the zirconium oxide grinding body is 3 mm: 1.7 mm: 0.8 mm-1: 2, and the mass ratio of the zirconium oxide grinding body to the steel slag is 10: 1.
Optionally, the grinding rotation speed of the wet grinding process is 400rpm, and the grinding time is 120 min.
Optionally, the cement is P · O42.5 grade portland cement.
Optionally, the particle size of the copper slag is less than 0.08 mm.
Optionally, the dispersion stabilizer is a mixture of phosphate polymer and konjac gum; the mass ratio of the phosphate water reducing agent to the konjac glucomannan is (50-60) to 1;
optionally, the molecular weight of the phosphate water reducing agent is 10000-30000, and the molecular structural formula of the phosphate water reducing agent is as follows:
wherein m, n and p are 3.3: 1 and (0.15-0.25).
The second purpose of the invention is to provide a method for preparing the copper slag-based high-fracture-resistance wear-resistant pavement repairing material, which comprises the following steps:
and mixing the cement, the copper slag and the interface reinforcing agent, adding the water and the dispersion stabilizer, uniformly stirring, and then curing and forming to obtain the copper slag-based high-fracture-resistance wear-resistant pavement repairing material.
Compared with the prior art, the copper slag-based high-fracture-resistance wear-resistant pavement repair material has the following advantages:
1. the copper slag-based high-fracture-resistance wear-resistant pavement repair material has the characteristics of high fracture-resistance strength, good wear resistance, high hydration speed, high early strength and the like, the fracture-resistance strength of 28d mortar reaches 7.0MPa, and the abrasion loss of the 28d mortar is less than 2.5kg/m2。
2. The method uses the copper slag and the slag to prepare the high-fracture-resistance wear-resistance pavement repair material, can open up a new green cement-based material, effectively improves the utilization rate of the copper slag and the slag, can be taken as an effective means for improving the additional value of the copper slag and the slag, and has a good popularization prospect in the aspect of utilization of the copper slag and the slag.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail with reference to examples.
The raw material composition of the copper slag-based high-fracture-resistance wear-resistant pavement repair material of the embodiments 1 to 6 of the invention is shown in table 1. Wherein the cement is P.O 42.5 grade ordinary portland cement.
TABLE 1
The types of the dispersion stabilizers in the copper slag-based high-fracture-resistance wear-resistant pavement repair materials of the embodiments 1 to 6 of the invention are shown in table 2, and the structural formula of the phosphate water reducing agent in the dispersion stabilizers is shown in the following.
TABLE 2
The copper slag-based high-fracture-resistance wear-resistant pavement repair material of the embodiments 1 to 6 is prepared according to the following method, and the specific preparation process is as follows:
1) putting the copper slag into a ball mill for grinding until the copper slag passes through a 0.08mm sieve;
2) crushing the steel slag, drying the crushed steel slag in a drying oven at 110 ℃, grinding the crushed steel slag in a small mill with the test of phi 500mm multiplied by 500mm, and then carrying out wet grinding by adopting a wet grinding process until the median particle size (D50) is 2-4 mu m, wherein the wet grinding process comprises the following steps: wet grinding is carried out by using a vertical stirring mill developed in a laboratory, zirconia balls with three specifications are used as grinding bodies in the mill, the diameters are respectively 3mm, 1.7mm and 0.8mm, the mass ratio of the zirconia balls is 1: 2, and in order to improve the wet grinding efficiency, a dispersion stabilizer is added during wet grinding; the wet milling process specifically comprises the following steps: firstly weighing 300g of zirconia balls, 30g of steel slag, 90g of water and 3g of dispersion stabilizer respectively, then putting the materials into a ceramic pot of a grinder, screwing the pot, grinding the materials for 120 minutes at the speed of 400rpm, and finally separating the zirconia balls to obtain the steel slag with the median particle size of 2-4 microns, namely an interface reinforcing agent;
3) according to the raw material proportion shown in the table 1, the finely ground copper slag and the interface reinforcing agent are added into the cement, then water and the dispersion stabilizer are added, the mixture is uniformly stirred, and then, the mixture is maintained and formed, so that the copper slag-based pavement repairing material with high fracture resistance and wear resistance is obtained.
The performance of the copper slag-based high-fracture-resistance wear-resistant pavement repair material of the embodiments 1 to 6 of the invention is tested, and the test results are shown in table 1. Wherein, the 28d mortar compressive strength is tested according to the GB/T17671-1999; the 28d abrasion loss is tested by an abrasion resistance tester according to the abrasion resistance test method of cement concrete of the industry standard of the people's republic of China.
As can be seen from Table 1, the copper slag-based high-breaking-resistance wear-resistant pavement repair material prepared by partially replacing cement with copper slag has the 28d breaking strength of more than 7.0MPa and the 28d wear loss of less than 2.5kg/m2。
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The copper slag-based high-fracture-resistance wear-resistant pavement repair material is characterized by comprising the following components in percentage by mass: cement: 30-50%, copper slag: 15-35%, interface reinforcing agent: 5-15%, dispersion stabilizer: 0.1-0.5%, and the balance of water.
2. The copper slag-based high fracture and wear resistant pavement repair material according to claim 1, wherein the interface reinforcing agent is prepared by the following method:
and drying and grinding the crushed steel slag, and then carrying out wet grinding treatment until the median particle size of the steel slag is 2-4 μm to obtain the interface reinforcing agent.
3. The copper slag-based pavement repair material with high fracture resistance and wear resistance according to claim 2, wherein a dispersion stabilizer is added during the wet grinding treatment; the mass ratio of the steel slag, the dispersion stabilizer and the water in the wet grinding treatment is 1: 0.1: 2.
4. The copper slag-based pavement repair material with high fracture and wear resistance according to claim 2, wherein the wet-grinding abrasive is a zirconia abrasive; the grading of the zirconium oxide grinding body is 3 mm: 1.7 mm: 0.8 mm-1: 2, and the mass ratio of the zirconium oxide grinding body to the steel slag is 10: 1.
5. The copper slag-based pavement repair material with high fracture and wear resistance of claim 2, wherein the wet grinding process is carried out at a grinding speed of 400rpm for 120 min.
6. The copper slag-based high-fracture-resistance wear-resistant pavement repair material as claimed in claim 1, wherein the cement is P-O42.5-grade ordinary portland cement.
7. The copper slag-based pavement repair material with high fracture resistance and wear resistance according to claim 1, wherein the particle size of the copper slag is less than 0.08 mm.
8. The copper slag-based pavement repair material with high fracture and wear resistance according to claim 1, wherein the dispersion stabilizer is a mixture of phosphate polymer and konjac glucomannan; the mass ratio of the phosphate water reducing agent to the konjac glucomannan is (50-60) to 1.
9. The copper slag-based high-fracture-resistance wear-resistant pavement repairing material as claimed in claim 8, wherein the molecular weight of the phosphate water reducing agent is 10000-30000, and the molecular structural formula of the phosphate water reducing agent is as follows:
wherein m, n and p are 3.3: 1 and (0.15-0.25).
10. The method for preparing the copper slag-based pavement repair material with high fracture resistance and wear resistance as defined in any one of claims 1 to 9, is characterized by comprising the following steps:
and mixing the cement, the copper slag and the interface reinforcing agent, adding the water and the dispersion stabilizer, uniformly stirring, and then curing and forming to obtain the copper slag-based high-fracture-resistance wear-resistant pavement repairing material.
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Cited By (3)
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| CN113321471A (en) * | 2021-06-15 | 2021-08-31 | 湖北工业大学 | Crack-resistant self-induction sleeve grouting material and preparation method thereof |
| CN113754377A (en) * | 2021-09-17 | 2021-12-07 | 佛山市科顺建筑材料有限公司 | Cement-based wear-resistant floor mortar composition, cement-based wear-resistant floor mortar and preparation method and application thereof |
| CN116675455A (en) * | 2023-05-24 | 2023-09-01 | 中铁四局集团有限公司 | Preparation method of high-activity steel slag admixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113321471A (en) * | 2021-06-15 | 2021-08-31 | 湖北工业大学 | Crack-resistant self-induction sleeve grouting material and preparation method thereof |
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| CN113754377A (en) * | 2021-09-17 | 2021-12-07 | 佛山市科顺建筑材料有限公司 | Cement-based wear-resistant floor mortar composition, cement-based wear-resistant floor mortar and preparation method and application thereof |
| CN116675455A (en) * | 2023-05-24 | 2023-09-01 | 中铁四局集团有限公司 | Preparation method of high-activity steel slag admixture |
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