CN111960790A - White marble waste slag used as environment-friendly material, coating, plate and building roadbed material and preparation method thereof - Google Patents
White marble waste slag used as environment-friendly material, coating, plate and building roadbed material and preparation method thereof Download PDFInfo
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
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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
- C04B20/0076—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 characterised by the grain distribution
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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
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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
- C04B20/023—Chemical treatment
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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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- 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
- C04B2111/00482—Coating or impregnation materials
- C04B2111/00508—Cement paints
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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
- 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
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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)
- Chemical Kinetics & Catalysis (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a white marble waste slag used as an environment-friendly material, a coating, a plate, a building roadbed material and a preparation method thereof, and is characterized in that the environment-friendly material consists of white marble ultrafine powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 3:1.2:0.3: 0.1.
Description
Technical Field
The invention relates to the technical field of screening and utilizing white marble waste residues, in particular to white marble waste residues used as an environment-friendly material, a coating, a plate, a building roadbed material and a preparation method thereof.
Background
The white marble mainly comprises CaCO3, MgCO3 and SiO2, and aiming at screening the white marble waste slag, the white marble waste slag is substantially screened out slag with good taste to be used as better resources for utilization, and the white marble waste slag with low taste is used as common powder, so that the resources can be utilized to the maximum extent, and the white marble waste slag is screened in a grading and grading manner.
However, the prior art, such as the chinese patent with patent application number 201610779300.3, named "a marble waste slag processing method", includes the following steps: the method comprises the steps of screening and grading; preparing raw materials; and manufacturing the sheet material. The invention uses the waste slag generated in the marble material processing process as the raw material, and the waste slag is processed into the artificial marble plate together with other raw materials after grading and modification treatment; the artificial marble plate manufactured by the invention has the characteristics of low raw material cost, convenience and easy obtainment, unique process and good decorative effect, has no obvious difference in appearance texture compared with a natural marble plate, and has the advantages of antibiosis, deodorization, sun protection and the like.
The Chinese patent with the patent application number of 201710560513.1 and the name of 'an environment-friendly ecological stone-like guardrail material and a preparation method thereof' comprises the following raw materials in parts by weight: 12-16 parts of light material mixture, 6-10 parts of phosphogypsum, 15-25 parts of cement, 10-20 parts of ceramic powder, 7-15 parts of white mica sheet, 12-16 parts of binder, 5-7 parts of waste slag, 7-9 parts of reinforcing fiber and 4-8 parts of weather-resistant retention additive. The guardrail material has bright and clean appearance, the characteristics of white marble, high mechanical strength, aging resistance and friction resistance, and simultaneously, the preparation method fully utilizes mineral waste, saves resources, is ecological and environment-friendly, has lower material cost, easily obtained raw materials and simple process, and has greater practical value and good application prospect.
Therefore, when the white marble raw material is utilized, only the separation is carried out according to the particle size, and the optimization is not carried out according to the quality; or the waste residue of other components is mixed into the imitated white marble material with the basic performance of the white marble, the substance of the imitated white marble material does not reach the smooth finish and the gorgeous of the white marble, so that the white marble waste residue particles are not fully utilized, thereby causing great waste to the white marble waste residue and causing certain pollution to the environment.
Disclosure of Invention
The invention aims to provide white marble waste slag used as an environment-friendly material, a coating, a plate, a building roadbed material and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the environment-friendly material is composed of white marble ultrafine powder, phosphogypsum powder, bluestone slag powder and plant fibers, wherein the mass ratio of the white marble waste slag to the environment-friendly material is 3:1.2:0.3: 0.1.
Preferably, the plant fiber is wood fiber.
A coating prepared by using white marble waste slag as an environment-friendly material is prepared by mixing white marble ultrafine powder, phosphogypsum powder, bluestone slag powder and plant fiber in a mass ratio of 3:1.2:0.3:0.1, and heating at a high temperature of 800 ℃ to obtain the coating.
A board prepared by using white marble waste slag as an environment-friendly material is prepared by adding white marble ultrafine powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 3:1.2:0.3:0.1 into a mold, and performing high-pressure compression hardening forming under 50MPa to obtain the board.
A preparation method of white marble waste slag used as an environment-friendly material comprises the following steps:
(1) screening and grading
Collecting white marble slag and screening to obtain white marble powder with the particle size of less than 1mm, white marble sand with the particle size of 1mm-10mm, white marble slag with the particle size of 11mm-30mm and white marble particles with the particle size of more than 30 mm;
(2) secondary screening and grading
Dividing the white marble powder with the particle size of less than 1mm, the white marble sand with the particle size of 1mm-10mm, the white marble slag with the particle size of 11mm-30mm and the white marble particles with the particle size of more than 30mm into 8 mineral particles according to the standard sieve that the content of white marble minerals is more than 80% and the content of white marble minerals is less than 80%;
(3) grouping of minerals
Dividing the 8 kinds of mineral particles obtained in the step (2) into a first group of mineral particles according to the standard that the content of the white marble mineral is more than 80 percent (containing 80 percent), and dividing the white marble mineral content less than 80 percent into a second group of mineral particles, grinding the first group of mineral particles into a first group of white marble ultrafine powder by a 600-mesh grinder, grinding the second group of mineral particles into a second group of white marble fine powder by a 200-mesh grinder;
(4) innocent treatment
Respectively putting the first group of white marble ultrafine powder and the second group of white marble fine powder obtained in the step (3) into prepared evaporation tanks, adding flocculating agents and the like, and removing chromium ions, arsenic ions and the like by recrystallization and volatilization to obtain a first group of harmless white marble ultrafine powder and a second group of harmless white marble fine powder for later use;
(5) blending of raw materials
And (3) putting the first group of harmless white marble ultrafine powder obtained in the step (4) into a stirrer according to the proportion of the white marble ultrafine powder, the phosphogypsum, the bluestone and the fiber of 3:1.2:0.3:0.1, stirring for 3-5min, and obtaining white marble waste residues used as an environment-friendly material after stirring.
A building roadbed material prepared by a preparation method of white marble waste slag used as an environment-friendly material comprises white marble fine powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 5:2:1: 0.8.
And further heating and mixing a second group of harmless white marble fine powder, phosphogypsum powder, bluestone slag powder and plant fibers at 750 ℃ to obtain the building roadbed material.
Compared with the prior art, the invention has the following beneficial effects:
(1) the Chinese white jade waste slag grading quick separation device skillfully adopted by the invention can analyze and screen the mineral content components of the Chinese white jade waste slag, and avoids the traditional screening of slag according to the particle size, so that the slag with different contents and tastes can be classified and utilized, the resource utilization level of the slag is greatly improved, the waste of the slag is avoided, the Chinese white jade resource is greatly saved, and a brand new screening process is provided in the technical field of Chinese white jade waste slag screening.
(2) The invention skillfully adopts the white marble waste residue as the raw material for production, realizes the effective utilization of the white marble waste residue, saves the production cost, greatly improves the economic benefit and greatly improves the smoothness and the gorgeous degree of the plate.
(3) The method skillfully puts the first group of white marble ultrafine powder and the second group of white marble fine powder into prepared evaporation tanks respectively, adds the flocculating agent, and removes chromium ions, arsenic ions and the like by recrystallization and volatilization, thereby realizing harmless treatment on the white marble waste residue, ensuring that the material prepared from the white marble waste residue is more environment-friendly and ecological, and greatly reducing the damage to the environment.
(4) The wood fiber is skillfully adopted, the wood fiber can lock 5-8 times of water by weight, the wood fiber has pseudoplastic rheological property when being dispersed in the coating, the shearing force is applied to the coating during construction, the locked water is released, the consistency of the coating is reduced, the coating has good construction performance, the water in the coating is promoted to be uniformly distributed, the opening time of a product is prolonged, the hydration of an inorganic material and the uniformity and sufficiency of film formation of an organic polymer are ensured, and the coating is prevented from cracking.
(5) The method adopts the white marble ultrafine powder ground by 600 meshes as the production raw material of the coating and the plate, so that the finished product of the coating and the plate after production and manufacture is smoother, the finish degree of the finished product is greatly improved, and the quality effect of the finished product is better.
In conclusion, the method has the advantages of high resource utilization rate, good economic benefit, saving of the white marble resource, environmental protection, ecology and the like, and has high practical value and popularization value in the technical field of screening and utilizing the white marble waste slag.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present application, the present invention will be further described with reference to the following examples, which include, but are not limited to, the following examples. All other embodiments that can be derived by a person skilled in the art from the embodiments given herein without making any creative effort fall within the protection scope of the present application.
Examples
The embodiment provides a white marble waste slag used as an environment-friendly material, which comprises white marble ultra-fine powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 3:1.2:0.3: 0.1.
Preferably, the plant fiber is wood fiber.
The embodiment also provides a coating prepared by using the white marble waste slag as an environment-friendly material, and the coating is obtained by mixing the white marble ultrafine powder, the phosphogypsum powder, the bluestone slag powder and the plant fiber in the mass ratio of 3:1.2:0.3:0.1 and heating at the high temperature of 800 ℃.
The embodiment further provides a board prepared by using the white marble waste slag as an environment-friendly material, which is characterized in that white marble ultrafine powder, phosphogypsum powder, bluestone slag powder and plant fiber in a mass ratio of 3:1.2:0.3:0.1 are added into a mould, and the board is obtained after compression, hardening and forming under the high pressure of 50 MPa.
In this embodiment, the preparation method of the white marble waste slag used as the environment-friendly material comprises the following steps:
(1) screening and grading
Collecting white marble slag and screening to obtain white marble powder with the particle size of less than 1mm, white marble sand with the particle size of 1mm-10mm, white marble slag with the particle size of 11mm-30mm and white marble particles with the particle size of more than 30 mm;
(2) secondary screening and grading
Dividing the white marble powder with the particle size of less than 1mm, the white marble sand with the particle size of 1mm-10mm, the white marble slag with the particle size of 11mm-30mm and the white marble particles with the particle size of more than 30mm into 8 mineral particles according to the standard sieve that the content of white marble minerals is more than 80% and the content of white marble minerals is less than 80%;
(3) grouping of minerals
Dividing the 8 kinds of mineral particles obtained in the step (2) into a first group of mineral particles according to the standard that the content of the white marble mineral is more than 80 percent (containing 80 percent), and dividing the white marble mineral content less than 80 percent into a second group of mineral particles, grinding the first group of mineral particles into a first group of white marble ultrafine powder by a 600-mesh grinder, grinding the second group of mineral particles into a second group of white marble fine powder by a 200-mesh grinder;
(4) innocent treatment
Respectively putting the first group of white marble ultrafine powder and the second group of white marble fine powder obtained in the step (3) into prepared evaporation tanks, adding flocculating agents and the like, and removing chromium ions, arsenic ions and the like by recrystallization and volatilization to obtain a first group of harmless white marble ultrafine powder and a second group of harmless white marble fine powder for later use;
(5) blending of raw materials
And (3) putting the first group of harmless white marble ultrafine powder obtained in the step (4) into a stirrer according to the proportion of the white marble ultrafine powder, the phosphogypsum, the bluestone and the fiber of 3:1.2:0.3:0.1, stirring for 3-5min, and obtaining white marble waste residues used as an environment-friendly material after stirring.
In this embodiment, there is further provided a building roadbed material prepared by the preparation method of the white marble waste slag used as an environment-friendly material, which comprises white marble fine powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 5:2:1: 0.8.
Specifically, heating and mixing a second group of harmless white marble fine powder, phosphogypsum powder, bluestone slag powder and plant fibers at 750 ℃ to obtain the building roadbed material.
The above-mentioned embodiments are only preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention, but all the modifications made by the principles of the present invention and the non-inventive efforts based thereon should fall within the scope of the present invention.
Claims (7)
1. The environment-friendly material is characterized by comprising white marble ultrafine powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 3:1.2:0.3: 0.1.
2. The marble refuse as defined in claim 1, wherein said plant fiber is wood fiber.
3. The coating prepared by using the white marble waste slag of any one of claims 1-2 as an environment-friendly material is characterized in that white marble ultra-fine powder, phosphogypsum powder, bluestone slag powder and plant fiber in a mass ratio of 3:1.2:0.3:0.1 are mixed and heated at a high temperature of 800 ℃ to obtain the coating.
4. A board prepared by using the waste white marble slag of any one of claims 1-2 as an environment-friendly material, which is characterized in that the ultra-fine white marble powder, the phosphogypsum powder, the bluestone slag powder and the plant fiber in the mass ratio of 3:1.2:0.3:0.1 are added into a mould and are subjected to high-pressure compression hardening forming under 50MPa to obtain the board.
5. The method for preparing the marble refuse slag as an environment-friendly material according to claim 1, which comprises the following steps:
(1) screening and grading
Collecting white marble slag and screening to obtain white marble powder with the particle size of less than 1mm, white marble sand with the particle size of 1mm-10mm, white marble slag with the particle size of 11mm-30mm and white marble particles with the particle size of more than 30 mm;
(2) secondary screening and grading
Dividing the white marble powder with the particle size of less than 1mm, the white marble sand with the particle size of 1mm-10mm, the white marble slag with the particle size of 11mm-30mm and the white marble particles with the particle size of more than 30mm into 8 kinds of mineral particles according to the standard sieve that the content of white marble minerals is more than 80% and the content of white marble minerals is less than 80%;
(3) grouping of minerals
Dividing the 8 kinds of mineral particles obtained in the step (2) into a first group of mineral particles according to the standard that the content of the white marble mineral is more than 80 percent (containing 80 percent), and dividing the white marble mineral content less than 80 percent into a second group of mineral particles, grinding the first group of mineral particles into a first group of white marble ultrafine powder by a 600-mesh grinder, grinding the second group of mineral particles into a second group of white marble fine powder by a 200-mesh grinder;
(4) innocent treatment
Respectively putting the first group of white marble ultrafine powder and the second group of white marble fine powder obtained in the step (3) into prepared evaporation tanks, adding flocculating agents and the like, and removing chromium ions, arsenic ions and the like by recrystallization and volatilization to obtain a first group of harmless white marble ultrafine powder and a second group of harmless white marble fine powder for later use;
(5) blending of raw materials
And (3) putting the first group of harmless white marble ultrafine powder obtained in the step (4) into a stirrer according to the proportion of the white marble ultrafine powder, the phosphogypsum, the bluestone and the fiber of 3:1.2:0.3:0.1, stirring for 3-5min, and obtaining white marble waste residues used as an environment-friendly material after stirring.
6. A building roadbed material prepared by the preparation method of the waste white marble slag as an environment-friendly material according to claim 5, which comprises fine white marble powder, phosphogypsum powder, bluestone slag powder and plant fibers in a mass ratio of 5:2:1: 0.8.
7. The building roadbed material of claim 6, wherein the second group of harmless white marble fine powder, phosphogypsum powder, bluestone slag powder and plant fiber are heated and mixed at 750 ℃ to obtain the building roadbed material.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113061012A (en) * | 2021-04-21 | 2021-07-02 | 雅安正兴汉白玉股份有限公司 | Novel composite green building material |
| CN114014595A (en) * | 2021-10-29 | 2022-02-08 | 四川华西绿舍建材有限公司 | Sleeve grouting material containing white marble waste residue for connecting steel bars and preparation method thereof |
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| CN108359273A (en) * | 2018-01-29 | 2018-08-03 | 南昌航空大学 | A method of improving marble powder whiteness |
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| CN113061012A (en) * | 2021-04-21 | 2021-07-02 | 雅安正兴汉白玉股份有限公司 | Novel composite green building material |
| CN114014595A (en) * | 2021-10-29 | 2022-02-08 | 四川华西绿舍建材有限公司 | Sleeve grouting material containing white marble waste residue for connecting steel bars and preparation method thereof |
| CN114014595B (en) * | 2021-10-29 | 2023-02-14 | 四川华西绿舍建材有限公司 | Sleeve grouting material containing white marble waste residue for connecting steel bars and preparation method thereof |
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Application publication date: 20201120 |