CN111606614A - Filling material containing lithium mica slag and preparation method and application thereof - Google Patents
Filling material containing lithium mica slag and preparation method and application thereof Download PDFInfo
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- CN111606614A CN111606614A CN202010370784.2A CN202010370784A CN111606614A CN 111606614 A CN111606614 A CN 111606614A CN 202010370784 A CN202010370784 A CN 202010370784A CN 111606614 A CN111606614 A CN 111606614A
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- air entraining
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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
- C04B28/021—Ash cements, e.g. fly ash cements ; Cements based on incineration residues, e.g. alkali-activated slags from waste incineration ; Kiln dust 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
- 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
- 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
- C04B28/06—Aluminous 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
- 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
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
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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
- C04B28/08—Slag 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
- 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/08—Filling-up hydraulically or pneumatically
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
-
- 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
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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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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- 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
Abstract
The invention relates to a filling material for lepidolite slag and a preparation method and application thereof, belonging to the technical field of filling of lepidolite slag. The filling material prepared by the invention is mixed with water to form slurry, has the viscosity close to that of water, is easy to pump (the pumping distance can reach 100-500 m), has excellent thixotropy and quick initial setting time (less than 60s), and solves the defects of long initial setting time, easy flowing of slurry and poor stacking effect of the product in the prior art; the filling material prepared by the invention has 100 percent consolidation and the highest compressive strength of 5MPa, and solves the problems of poor consolidation performance and low compressive strength of products in the prior art. The high-water filling material prepared by the invention does not need complex auxiliary treatment such as supporting of a filling template and the like in the construction process, has simple filling process, and is particularly suitable for the requirement of quick filling in emergency situations in mines.
Description
Technical Field
The invention relates to a filling material containing lepidolite slag, a preparation method thereof and application thereof in mine filling, belonging to the technical field of filling by using the lepidolite slag.
Background
The lithium resources in China are rich in types and large in reserves, wherein the lithium resources in Jiangxi province are mainly lepidolite ores, the reserve of the lepidolite ores is 71.03 ten thousand tons, and the lepidolite lithium mineral is one of the largest lithium resources mined and utilized in China. With the rapid development of new industries, the demand of China for lithium salts is rapidly increased year by year, and the discharge amount of lithium slag is increased day by day. According to statistics, about 8-10 t of lepidolite slag is generated when 1t of lithium salt is produced, a large amount of accumulated lepidolite slag occupies land on one hand, secondary pollution is caused to the environment on the other hand, and along with the large amount of exploitation of lepidolite, overlying rock layers of lepidolite mines collapse to cause large-range collapse of the earth surface, so that ground buildings, railways, roads, rivers and the like are seriously damaged. The mine filling mining is an important technical means of high mining efficiency, safety and green construction of modern mines in China, and can play multiple roles of comprehensively solving the problem of effective utilization of solid wastes of mines, improving the mining rate of ore resources and protecting the surface ecological environment.
The materials currently used for mine filling mainly comprise high-molecular foaming filling materials, inorganic powder foaming filling materials, foaming cement slurry filling materials mainly comprising cement and fly ash, high-water filling materials and the like. The high polymer foaming filling material has the advantages of rapid reaction, large foaming times, simple and rapid construction, less single materials, but the problems of incapability of pumping in a long distance, high curing temperature, potential safety hazard, toxic substances such as formaldehyde, phenol and the like, low compressive strength and the like. The inorganic powder foaming filling material has the characteristics of good pumping performance, long-distance pumping, simple and convenient operation and excellent sealing property, but has high early investment cost, long foaming time and low compressive strength, and can not meet the actual use requirement of mine filling. The foaming cement slurry filling material mainly comprising cement and fly ash uses cement, fly ash and other materials in large quantity, has wide material source, low cost and excellent long-distance pumping performance, the compressive strength of slurry can reach about 1MPa, but the equipment investment is large, the dust pollution is serious, grouting pipelines need to be pre-buried for filling waste roadways, and sectional filling and sectional grout stopping walls are designed, so the flexibility is not enough, and the foaming cement slurry filling material is not suitable for small-range filling. The high-water filling material has the advantages of good pumping performance, short rapid hardening time, capability of utilizing slag as a raw material and the like, can fully meet the requirements of the layered mining technology, can fill and treat large goafs quickly, can utilize waste slag, reduces the pollution to the land environment, reduces the material cost, and is widely applied to the field of mine filling. The invention patents CN107417228A and CN105152612A respectively disclose a fly ash-doped high-water filling material and a gravel-doped high-water filling material, which reduce the cost of the filling material, but the final setting strength needs to be further improved (the final setting strength of the former 28d is only 540kPa, and the final setting strength of the latter is only 755-1140 kPa). The invention patents CN108706922A and CN101792291A respectively disclose a high water swelling filling material which has the characteristics of good fluidity and high final setting strength, but the initial setting time is long (the initial setting time of the former is 67-187 min; the initial setting time of the latter is 90-120 min), and the slurry accumulation capacity is poor. At present, China has little research on high-water filling materials, and the existing high-water filling materials generally have the problems of long initial setting time, low slurry viscosity and easy flowing in the filling process, so that accurate consolidation in a specified area is difficult to realize, and inconvenience is brought to filling construction and subsequent mining. When the slag is doped to prepare a high-water material, the quality problems of poor consolidation performance and reduced mechanical property of the material also exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a filling material containing lithium mica slag, a preparation method and application thereof.
The purpose of the invention is realized by the following technical scheme.
The raw materials of the filling material comprise a cement-based cementing material, an air entraining agent, an early strength agent, a thickening agent, a foam stabilizer and a coagulant;
the filling material comprises the following components in percentage by mass, calculated by taking the total mass of the raw materials of the filling material as 100 percent:
the mass of the lepidolite slag is 15 to 30 percent of the total mass of the raw materials of the filling material.
The cement-based cementing material has the functions of regulating and controlling the cementing time of the filling material and increasing the compressive strength of the filling material, and is at least one of sulphoaluminate cement, aluminate cement, ferro-aluminate cement, portland cement, slag cement, fly ash cement and gypsum;
the air entraining agent can promote the mixing reaction of the filling material and water to generate bubbles and improve the fluidity and cohesiveness of the slurry, and is at least two of an animal protein air entraining agent, a plant protein air entraining agent, a saponin air entraining agent, a rosin resin air entraining agent and a fatty alcohol sulfonate air entraining agent, preferably selected from two or three of the animal protein air entraining agent, the plant protein air entraining agent and the saponin air entraining agent;
the early strength agent has the effects of accelerating the hydration reaction speed of the filling material and promoting the increase of the early compressive strength, and is at least two of sodium fluoride, sodium chloride, potassium chloride, calcium chloride, sodium nitrite, urea, water glass, ethylene glycol, triisopropanolamine, triethanolamine, formic acid and calcium formate, preferably two or more of the sodium fluoride, the sodium nitrite, the urea, the triethanolamine and the calcium formate are used in a composite way;
the thickening agent is mainly used for adjusting the fluidity of the slurry after the filling material is mixed with water and promoting the caking property of the slurry and the contact surface of a filling cavity, and the thickening agent is at least one of starch, gelatin, natural rubber, maltodextrin, organic bentonite, diatomite, silica gel, methyl cellulose, carboxymethyl hydroxyethyl cellulose and hydroxyethyl cellulose, preferably one or more selected from starch, methyl cellulose and carboxymethyl cellulose;
the foam stabilizer can improve the stability of bubbles generated by mixing and reacting the filling material and water, so that the internal pores of the filling material are uniformly distributed, the pore structure is improved, the mechanical property is improved, and the material consumption is reduced, wherein the foam stabilizer is at least one of lauryl sodium sulfate, fatty alcohol-polyoxyethylene ether sodium sulfate (AES), alpha-alkenyl sodium sulfonate (AOS), polyacrylamide, polyvinyl alcohol, protein, polypeptide, starch, hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose ether, and is preferably selected from one or more of AES, AOS and polyacrylamide;
the coagulant can improve the consistency of the slurry after the filling material is mixed with water and promote the gelation, and is at least two of sodium silicate, potassium silicate, sodium carbonate, sodium bicarbonate, lithium carbonate, calcium carbonate, sodium chloride, calcium chloride, sodium sulfate, aluminum sulfate, sodium aluminate, calcium fluoroaluminate, calcium formate, triethanolamine, polyacrylic acid, polymethacrylic acid and acrylate, preferably two or more of sodium silicate, calcium carbonate, lithium carbonate, calcium formate and sodium aluminate are used in a composite way;
the lepidolite slag is active solid waste generated in the lepidolite smelting process, has the effect of promoting hydration reaction and can reduce the material cost, and the fineness of the lepidolite slag is selected to be 500-2000 meshes, preferably 800-1500 meshes.
A preparation method of a high water filling material for lepidolite slag comprises the steps of adding raw materials of the high water filling material for lepidolite slag into a stirring kettle according to a mass ratio, and stirring and mixing for 15-30min to obtain the high water filling material.
The application of the high-water filling material for the lepidolite slag is characterized in that the high-water filling material and water are mixed according to a mass ratio of 1: 1-5, stirring at high speed and outputting quickly by an injection pump, pumping the mixture with the pumping distance of 100-500 m, forming foam slurry at the discharge position of a pipe orifice, and placing the foam slurry at a cavity position for stacking and filling.
Compared with the prior art, the invention has the following beneficial effects:
(1) the filling material prepared by the invention is mixed with water to form slurry, has the viscosity close to that of water, is easy to pump (the pumping distance can reach 100-500 m), has excellent thixotropy and quick initial setting time (less than 60s), and solves the defects of long initial setting time, easy flowing of slurry and poor stacking effect of the product in the prior art;
(2) the filling material prepared by the invention is 100% consolidated, the highest compressive strength can reach 5MPa, and the problems of poor consolidation performance and low compressive strength of products in the prior art are solved;
(3) the high-water filling material prepared by the invention has large foaming times (up to 20 times), does not shrink after being cured, can effectively fill irregular cavity space, realizes excellent compactness, prevents gas accumulation under a mine, and has stable filling quality;
(4) the filling material prepared by the invention utilizes lepidolite solid waste of a metallurgical plant as a raw material, thereby reducing secondary pollution and material cost;
(5) the high-water filling material prepared by the invention does not need complex auxiliary treatment such as supporting of a filling template and the like in the construction process, has simple filling process, and is particularly suitable for the requirement of quick filling in emergency situations in mines.
Detailed Description
For a further understanding of the invention, preferred embodiments of the invention are described below in conjunction with the specific embodiments.
Examples 1 to 5
The lepidolite slag-based high-water filling material is prepared for standby by stirring for 30min according to the mass parts of the cement-based cementing material, the lepidolite slag, the air entraining agent, the early strength agent, the thickening agent, the foam stabilizer and the coagulant listed in the following table 1.
TABLE 1
The lepidolite slag-based high water content filler prepared in table 1 and water were mixed and rapidly output in the grouting pump mixing bin according to the mass ratio listed in table 2 below, and the product performance index was as listed in table 2.
TABLE 2
Claims (10)
1. A filling material for lepidolite slag, characterized by: the filling material comprises raw materials of a cement-based cementing material, an air entraining agent, an early strength agent, a thickening agent, a foam stabilizer and a coagulant;
the filling material comprises the following components in percentage by mass, calculated by taking the total mass of the raw materials of the filling material as 100 percent:
the cement-based cementing material is at least one of sulphoaluminate cement, aluminate cement, ferro-aluminate cement, portland cement, slag cement, fly ash cement and gypsum;
the air entraining agent is at least two of an animal protein air entraining agent, a vegetable protein air entraining agent, a saponin air entraining agent, a rosin resin air entraining agent and a fatty alcohol sulfonate air entraining agent;
the early strength agent is at least two of sodium fluoride, sodium chloride, potassium chloride, calcium chloride, sodium nitrite, urea, water glass, ethylene glycol, triisopropanolamine, triethanolamine, formic acid and calcium formate;
the thickening agent is at least one of starch, gelatin, natural rubber, maltodextrin, organic bentonite, diatomite, silica gel, methyl cellulose, carboxymethyl hydroxyethyl cellulose and hydroxyethyl cellulose;
the foam stabilizer is at least one of sodium dodecyl sulfate, fatty alcohol-polyoxyethylene ether sodium sulfate (AES), alpha-sodium alkenyl sulfonate (AOS), polyacrylamide, polyvinyl alcohol, protein, polypeptide, starch, hydroxypropyl methyl cellulose and hydroxyethyl methyl cellulose ether;
the coagulant is at least two of sodium silicate, potassium silicate, sodium carbonate, sodium bicarbonate, lithium carbonate, calcium carbonate, sodium chloride, calcium chloride, sodium sulfate, aluminum sulfate, sodium aluminate, calcium fluoroaluminate, calcium formate, triethanolamine, polyacrylic acid, polymethacrylic acid and acrylate.
2. The filling material for lepidolite slag according to claim 1, wherein: the mass of the lepidolite slag is 15 to 30 percent of the total mass of the raw materials of the filling material.
3. The filling material for lepidolite slag according to claim 1, wherein: the air entraining agent is obtained by compounding two or three of an animal protein air entraining agent, a plant protein air entraining agent and a saponin air entraining agent.
4. The filling material for lepidolite slag according to claim 1, wherein: the early strength agent is two or more of sodium fluoride, sodium nitrite, urea, triethanolamine and calcium formate which are used in a composite way.
5. The filling material for lepidolite slag according to claim 1, wherein: the thickening agent is at least one of starch, methyl cellulose and carboxymethyl cellulose.
6. The filling material for lepidolite slag according to claim 1, wherein: the foam stabilizer is at least one of AES, AOS and polyacrylamide.
7. The filling material for lepidolite slag according to claim 1, wherein: the coagulant is two or more of sodium silicate, calcium carbonate, lithium carbonate, calcium formate and sodium aluminate which are used in a composite way.
8. The filling material for lepidolite slag according to claim 1, wherein: the fineness of the lepidolite slag is 500-2000 meshes.
9. A preparation method of a filling material for lepidolite slag is characterized by comprising the following steps: adding the raw materials of the filling material of the lepidolite slag into a stirring kettle according to the mass ratio, and stirring and mixing for 15-30min to obtain the filling material.
10. Use of a filling material for lepidolite slag, characterized in that: mixing a filling material and water according to a mass ratio of 1: 1-5, stirring and outputting at a high speed by an injection pump, pumping the mixture with the pumping distance of 100-500 m, forming foam slurry at the discharge position of a pipe orifice, and placing the foam slurry in a cavity.
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Cited By (3)
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| CN112608061A (en) * | 2020-12-18 | 2021-04-06 | 徐州中矿大贝克福尔科技股份有限公司 | Accelerating agent composition for coal mine paste filling and preparation method and application thereof |
| CN114031341A (en) * | 2021-12-20 | 2022-02-11 | 江西省建筑材料工业科学研究设计院 | Method for preparing baking-free steaming-free cured brick by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing |
| CN115872695A (en) * | 2022-10-25 | 2023-03-31 | 江西省建材科研设计院有限公司 | Lepidolite slag concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112608061A (en) * | 2020-12-18 | 2021-04-06 | 徐州中矿大贝克福尔科技股份有限公司 | Accelerating agent composition for coal mine paste filling and preparation method and application thereof |
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| CN114031341A (en) * | 2021-12-20 | 2022-02-11 | 江西省建筑材料工业科学研究设计院 | Method for preparing baking-free steaming-free cured brick by cooperation of lepidolite ore dressing pressed fine mud and lithium slag based on carbon curing |
| CN114031341B (en) * | 2021-12-20 | 2022-09-16 | 江西省建材科研设计院有限公司 | Method for preparing baking-free steaming-free cured brick by cooperating lepidolite ore dressing squeezed fine mud and lithium slag based on carbon curing |
| CN115872695A (en) * | 2022-10-25 | 2023-03-31 | 江西省建材科研设计院有限公司 | Lepidolite slag concrete |
| CN115872695B (en) * | 2022-10-25 | 2024-02-09 | 江西省建材科研设计院有限公司 | Lepidolite slag concrete |
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Application publication date: 20200901 |