CN110922202A - Preparation method of novel regenerated ceramsite, novel regenerated ceramsite and application thereof - Google Patents
Preparation method of novel regenerated ceramsite, novel regenerated ceramsite and application thereof Download PDFInfo
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/30—Oxides other than silica
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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
- C04B18/02—Agglomerated materials, e.g. artificial aggregates
- C04B18/027—Lightweight materials
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- 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
- C04B18/0418—Wet materials, e.g. slurries
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- 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
- C04B18/16—Waste materials; Refuse from building or ceramic industry
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1321—Waste slurries, e.g. harbour sludge, industrial muds
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1324—Recycled material, e.g. tile dust, stone waste, spent refractory material
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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Abstract
The invention discloses a preparation method of novel regenerated ceramsite, the novel regenerated ceramsite and application thereof, the preparation method of the novel regenerated ceramsite uses sludge, iron tailings and construction waste as raw materials to replace the traditional clay and shale to prepare the regenerated ceramsite, the preparation method utilizes the iron tailings, the sludge and the construction waste to fire the ceramsite, not only can greatly consume the iron tailings and the sludge, eliminate potential safety hazards of a tailing pond and comprehensively treat the problems of the tailings and the sludge, but also can change waste into valuable, inputs novel materials for the building material industry, increases the recycling economic benefits of mines, solves the sludge treatment problem, is an effective way for comprehensively utilizing the tailings and the sludge, and the prepared novel regenerated ceramsite has low water absorption rate, high cylinder pressure strength, good freezing resistance and good firmness.
Description
Technical Field
The invention relates to the technical field of material recovery, in particular to a preparation method of novel regenerated ceramsite, the novel regenerated ceramsite and application of the novel regenerated ceramsite.
Background
With the continuous increase of national economy, the national building industry rises rapidly, the demand of building materials is continuously enlarged, and meanwhile, the consciousness of national life and environmental protection is continuously improved, and new higher requirements are also made on building safety and building material quality. The urban multi-storey and high-rise buildings are continuously emerged, the foundation bearing is seriously overloaded, particularly the urban ground with soft foundation begins to sink rapidly, and serious hidden danger is brought to urban safety; due to the rapid development of urban and rural construction, massive use of solid clay bricks damages millions of acres of farmlands in China. In recent years, the national ministry of construction has emphasized that wall materials must be reformed, so that the economic loss of the country is reduced as much as possible, and the urban safety and social stability are ensured. The method provides higher requirements for the reform of the building material industry, simultaneously brings good opportunities for the large development of the light building material industry and the rise of the ceramsite industry.
The ceramsite light aggregate is ceramic particles, the surface of which is a layer of hard outer shell in ceramic or enamel, and the interior of which is provided with a large number of closed micropores. The ceramsite not only has light weight, heat insulation and preservation, low water absorption, but also has good properties of fire resistance, shock resistance, impermeability, frost resistance, durability, alkali-resistant aggregate reaction capacity and the like. Therefore, the ceramsite is widely applied to the fields of buildings, petroleum, chemical engineering, agriculture, fillers, filter materials and the like. However, the traditional ceramsite lightweight aggregate is made of clay, shale and other natural minerals, and the extensive use of clay, shale and other natural minerals can destroy cultivated land and ecological environment. With the increasing environmental problems and the deep awareness of the environmental protection concept in recent years, the national policy of restricting the exploitation and utilization of natural minerals such as clay and shale has been developed, and the development of new clay and shale substitutes has become a research focus in recent years.
Disclosure of Invention
The invention aims to overcome at least one defect of the prior art and provides a preparation method of novel regenerated ceramsite, which is prepared by using waste materials such as sludge, tailings and the like to replace the traditional clay and shale for firing ceramsite, so that the problem of energy shortage is solved, the problem of waste material recovery is solved, and the performance of the prepared novel regenerated ceramsite is equivalent to that of the common ceramsite light aggregate.
The invention also aims to provide a novel regenerated ceramsite. The prepared novel regenerated ceramsite has low water absorption, high cylinder pressure intensity and good freezing resistance and firmness.
The invention also aims to provide application of the novel regenerated ceramsite.
The technical scheme adopted by the invention is as follows:
a preparation method of novel regenerated ceramsite comprises the following steps:
s1, primarily screening the sludge to obtain a mixed material with the particle size of below 20mm, crushing the mixed material, magnetically separating, separating organic matters, removing scrap iron and the organic matters, and screening to obtain a material with the particle size of below 5 mm;
s2, separating the material obtained in the step S1 by a sand scraping pool to obtain sand grains and slurry;
s3, adding organic acid into the slurry obtained in the step S2, adjusting the pH value to be 5-6.5, stirring for 0.5-1 h, filtering by using a slurry filter screen of 100-200 meshes to obtain acid activated soil, pre-drying the activated soil to obtain semi-dry soil with the water content of 40-50%, adding sodium humate and sodium lignosulfonate, performing wet ball milling, and putting the semi-dry soil into a closed chamber to age for 15-20 days at room temperature to obtain plastic clay;
s4, crushing the iron tailings, and screening the iron tailings through a screen with 100-300 meshes to obtain fine iron tailing powder;
s5, sorting the construction waste, crushing, magnetically separating to remove metals, screening to obtain fine construction waste with the particle size of less than 5mm, placing the fine construction waste in a storage bin for later use, and continuously crushing and screening the construction waste with the particle size of more than 5mm until the particle size of the construction waste is less than 5 mm;
s6, mixing the plastic clay obtained in the step S3, the fine iron tailing powder obtained in the step S4 and the fine building garbage obtained in the step S5 according to the mass ratio of (50-70): (15-25): (15-25), adding 30-40 parts of water, mixing and stirring uniformly, and ageing;
and S7, extruding the mixed material obtained in the step S6 by an extruder, granulating to form granules, performing secondary granulation on the granules, performing roller granulation for 3-5 minutes for the first time, performing granulation for 4-6 minutes for the second time to obtain granules, roasting, annealing and grading, and selecting ceramsite with the particle size of 5-10 mm to obtain the novel regenerated ceramsite.
A large amount of tailings can be produced in the mining process of mineral resources, and generally speaking, in a ferrous metal mine, the amount of tailings accounts for 50% -80% of the total amount of ores; in the nonferrous metal mine, the amount of tailings accounts for 70-95% of the total amount, a large amount of tailings are piled up, occupy land and pollute the environment, particularly clay tailings, and because the clay tailings have the characteristics of fine granularity, large specific surface area and easy bonding, the water drainage capacity of a tailing pond is poor due to the large amount of the clay tailings deposited at the bottom of the tailing pond, so that great potential safety hazards are brought to the tailing pond.
The dirtiest parts after sewage treatment are sludge containing a large amount of heavy metals, viruses, parasitic ova and other harmful substances, and if the sludge is not treated, serious secondary pollution is caused. At present, the annual sludge production in China is nearly 2200 million tons, 80 percent of sludge is not properly treated, and the phenomena of random abandonment and dumping generally exist, so that the problem of secondary pollution caused by the phenomena is not ignored, and partial pollution emission reduction results are even offset to a certain extent. How to treat the sludge produced by sewage treatment plants is a common problem in all big and medium cities in the world.
The preparation method of the novel regenerated ceramsite uses sludge, iron tailings and construction waste as raw materials to replace the traditional clay and shale to prepare the regenerated ceramsite, wherein the raw material sludge is used for separating sand grains and slurry, the slurry is acidified and aged to obtain plastic clay, and the plastic clay is mixed with the iron tailings and the construction waste, and the regenerated ceramsite is obtained after ageing, granulation and roasting. In the scheme, the iron tailings, the sludge and the construction waste are used for firing the ceramsite, so that the iron tailings and the sludge can be consumed in a large amount, potential safety hazards of a tailing pond are eliminated, the problems of the tailings and the sludge are comprehensively treated, waste can be changed into valuable, a novel material is input into the building material industry, the recycling economic benefit of a mine is increased, the problem of sludge treatment is solved, and the method is an effective way for comprehensively utilizing the tailings and the sludge. The invention utilizes the iron tailings, the sludge and the building waste to fire the ceramsite, comprehensively utilizes resources, reduces environmental pollution and has double significance.
Preferably, the sludge is one or more of quicksand sludge, domestic sludge or construction sludge.
Preferably, the organic acid is any one of acetic acid, glycolic acid and oxalic acid.
Preferably, the addition amount of the sodium humate and the sodium lignin sulfonate is 0.5 to 1 percent of the weight of the semi-dry soil.
Preferably, the aging time in the step S6 is 24-48 h.
Preferably, the mass ratio of the plastic clay, the fine iron tailing powder and the fine building rubbish in the step S6 is as follows: (54-58): (20 to 22): (22-24).
Preferably, the roasting process in step S7 is specifically: and (3) conveying the granules into a roasting kiln, pre-burning for 20-40 min at 400-550 ℃, and then heating to 900-1100 ℃ for roasting for 40-80 min. More preferably, the roasting process in step S7 is specifically: presintering at 400-450 ℃ for 30-40 min, and then heating to 1000-1100 ℃ for roasting for 45-60 min.
The novel regenerated ceramsite prepared by the preparation method.
The novel regenerated ceramsite is applied to the fields of ceramsite building blocks, ceramsite wallboards and environment-friendly cured water permeable bricks.
The novel regenerated ceramsite can be used for preparing ceramsite reinforced building blocks, and the ceramsite building blocks have the characteristics of light weight, high strength, heat insulation, fire prevention, sound insulation, environmental protection, reduced shrinkage, proper water absorption, strong impermeability, precise size, attractive appearance, convenience in masonry and facing and the like, and technical innovation points.
The novel regenerated ceramsite can be used for preparing ceramsite wallboards, and the lightweight concrete ceramsite partition wallboard has the characteristics of light weight, high strength, sound insulation, fire prevention, moisture prevention, environmental protection, high construction speed, low comprehensive cost and the like, and is widely applied to inner partition walls of frame structure buildings such as office buildings, restaurants, hotels, residential districts, commercial buildings, student dormitories, office buildings, hospitals, schools, hotels, entertainment halls, movable board houses, factory buildings, old room modification classrooms and the like.
The novel regenerated ceramsite can be used for preparing environment-friendly cured water permeable bricks, and the water permeable bricks are novel century environment-friendly building material products which are used for solving the problem of hardening of urban ground surfaces, creating high-quality natural living environments and maintaining urban ecological balance and greatly bring birth. The environment-friendly cured water permeable brick prepared from the novel regenerated ceramsite has the characteristics of keeping the water permeability and moisture retention of the ground, preventing skid, having high strength, resisting cold and weathering, reducing noise, absorbing sound and the like. The slag waste is used as a raw material, and is formed twice, so that the slag is a green and environment-friendly product.
Compared with the prior art, the invention has the beneficial effects that: the method for preparing the novel regenerated ceramsite uses the sludge, the iron tailings and the construction waste as raw materials to replace the traditional clay and shale to prepare the regenerated ceramsite. The invention utilizes the iron tailings, the sludge and the building waste to fire the ceramsite, comprehensively utilizes resources, reduces environmental pollution and has double significance.
Drawings
FIG. 1 is a flow chart of a production process for preparing ceramsite dices.
Detailed Description
The following examples of the present invention are illustrative only and are not to be construed as limiting the invention.
Example 1
A novel regenerated ceramsite is prepared by the following steps:
s1, primary screening the quicksand sludge and the domestic sludge to obtain a mixed material with the particle size of below 20mm, crushing, magnetically separating and separating organic matters from the mixed material to remove scrap iron and organic matters, and screening to obtain a material with the particle size of below 5 mm.
And S2, separating the material obtained in the step S1 by a sand scraping pool to obtain sand grains and slurry, wherein the sand grains can be stored for other fields.
S3, adding organic acid acetic acid into the slurry obtained in the step S2, adjusting the pH value to be 5-6.5, stirring for 0.5-1 h, filtering by using a slurry filter screen of 100-200 meshes to obtain acid activated soil, pre-drying the activated soil to obtain semi-dry soil with the water content of 40-50%, adding sodium humate and sodium lignosulfonate which respectively account for 0.5% of the weight of the semi-dry soil, performing wet ball milling, and putting into a closed chamber for ageing at room temperature for 20 days to obtain plastic clay.
S4, crushing the iron tailings, and screening the iron tailings through a screen with 100-300 meshes to obtain fine iron tailing powder.
S5, sorting the construction waste, crushing, magnetically separating to remove metals, screening to obtain fine construction waste with the particle size of less than 5mm, placing the fine construction waste in a storage bin for later use, and continuously crushing and screening the construction waste with the particle size of more than 5mm until the particle size of the construction waste is less than 5 mm.
S6, mixing the plastic clay obtained in the step S3, the fine iron tailing powder obtained in the step S4, and the fine building garbage obtained in the step S5 according to a mass ratio of 58: 20: 22, adding 30 parts of water, uniformly mixing and stirring, and aging for 30 hours;
and S7, extruding the mixed material obtained in the step S6 through an extruder, granulating to form granules, granulating twice, granulating for 3-5 minutes by using a pair of rollers for the first time, granulating for 4-6 minutes by using a granulation roller for the second time, conveying the granules into a roasting kiln, pre-burning for 30 minutes at 450 ℃, heating to 1000 ℃, roasting for 60 minutes, annealing, grading, and selecting ceramsite with the particle size of 5-10 mm to obtain the novel regenerated ceramsite.
Example 2
A novel regenerated ceramsite is prepared by the following steps:
s1, primary screening the quicksand sludge and the domestic sludge to obtain a mixed material with the particle size of below 20mm, crushing, magnetically separating and separating organic matters from the mixed material to remove scrap iron and organic matters, and screening to obtain a material with the particle size of below 5 mm.
And S2, separating the material obtained in the step S1 by a sand scraping pool to obtain sand grains and slurry, wherein the sand grains can be stored for other fields.
S3, adding organic acid acetic acid into the slurry obtained in the step S2, adjusting the pH value to be 5-6.5, stirring for 0.5-1 h, filtering by using a slurry filter screen of 100-200 meshes to obtain acid activated soil, pre-drying the activated soil to obtain semi-dry soil with the water content of 40-50%, adding sodium humate and sodium lignin sulfonate which respectively account for 1% of the weight of the semi-dry soil, performing wet ball milling, and putting into a sealed chamber to age for 15 days at room temperature to obtain plastic clay.
S4, crushing the iron tailings, and screening the iron tailings through a screen with 100-300 meshes to obtain fine iron tailing powder.
S5, sorting the construction waste, crushing, magnetically separating to remove metals, screening to obtain fine construction waste with the particle size of less than 5mm, placing the fine construction waste in a storage bin for later use, and continuously crushing and screening the construction waste with the particle size of more than 5mm until the particle size of the construction waste is less than 5 mm.
S6, mixing the plastic clay obtained in the step S3, the fine iron tailing powder obtained in the step S4, and the fine building garbage obtained in the step S5 according to a mass ratio of 54: 22: 24, adding 40 parts of water, uniformly mixing and stirring, and aging for 48 hours;
and S7, extruding the mixed material obtained in the step S6 through an extruder, granulating to form granules, granulating twice, granulating for 3-5 minutes by using a pair of rollers for the first time, granulating for 4-6 minutes by using a pair of rollers for the second time, conveying the granules into a roasting kiln, pre-burning for 40 minutes at the temperature of 400 ℃, then heating to 1100 ℃, roasting for 45 minutes, annealing, grading, and selecting ceramsite with the particle size of 5-10 mm to obtain the novel regenerated ceramsite.
The novel regenerated ceramsite described in examples 1 and 2 is subjected to performance test, the test method refers to national standard GB/T1743.1-1998 lightweight aggregate and test method thereof, and the test results are shown in Table 1.
TABLE 1
| Test items | Example 1 | Example 2 |
| Water absorption/%) | 1.5 | 1.8 |
| Barrel pressure strength/MPa | 10 | 9.8 |
| Bulk density/(Kg/m 3) | 780 | 772 |
| Freezing resistance | Qualified | Qualified |
| Firmness of use | Qualified | Qualified |
As can be seen from Table 1, the novel regenerated ceramsite of the present invention has the advantages of large cylinder pressure, low water absorption, good freezing resistance and firmness, and excellent performance.
The novel regenerated ceramsite prepared by the preparation method described in example 1 is further prepared into ceramsite dices, and the preparation process is shown in figure 1. The prepared ceramsite cut-blocks were compared with other bricks, and the properties are shown in table 2.
TABLE 2
As can be seen from Table 2, the ceramsite cutting blocks prepared by using the novel regenerated ceramsite have comprehensive performance superior to that of common aerated bricks and traditional brick walls.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the claims of the present invention should be included in the scope of protection of the claims of the present invention.
Claims (8)
1. The preparation method of the novel regenerated ceramsite is characterized by comprising the following steps of:
s1, primarily screening the sludge to obtain a mixed material with the particle size of below 20mm, crushing the mixed material, magnetically separating, separating organic matters, removing scrap iron and the organic matters, and screening to obtain a material with the particle size of below 5 mm;
s2, separating the material obtained in the step S1 by a sand scraping pool to obtain sand grains and slurry;
s3, adding organic acid into the slurry obtained in the step S2, adjusting the pH value to be 5-6.5, stirring for 0.5-1 h, filtering by using a slurry filter screen of 100-200 meshes to obtain acid activated soil, pre-drying the activated soil to obtain semi-dry soil with the water content of 40-50%, adding sodium humate and sodium lignosulfonate, performing wet ball milling, and putting the semi-dry soil into a closed chamber to age for 15-20 days at room temperature to obtain plastic clay;
s4, crushing the iron tailings, and screening the iron tailings through a screen with 100-300 meshes to obtain fine iron tailing powder;
s5, sorting the construction waste, crushing, magnetically separating to remove metals, screening to obtain fine construction waste with the particle size of less than 5mm, placing the fine construction waste in a storage bin for later use, and continuously crushing and screening the construction waste with the particle size of more than 5mm until the particle size of the construction waste is less than 5 mm;
s6, mixing the plastic clay obtained in the step S3, the fine iron tailing powder obtained in the step S4 and the fine building garbage obtained in the step S5 according to the mass ratio of (50-70): (15-25): (15-25), adding 30-40 parts of water, mixing and stirring uniformly, and aging;
and S7, extruding the mixed material obtained in the step S6 through an extruder, granulating to form granules, performing secondary granulation on the granules, performing roller granulation for 3-5 minutes for the first time, performing granulation for 4-6 minutes for the second time to obtain granules, roasting, annealing and grading, and selecting ceramsite with the particle size of 5-10 mm to obtain the novel regenerated ceramsite.
2. The method for preparing novel regenerated ceramsite according to claim 1, wherein the sludge is one or more of quicksand sludge, domestic sludge or construction sludge.
3. The method for preparing novel regenerated ceramsite according to claim 1, wherein the organic acid is any one of acetic acid, glycolic acid and oxalic acid.
4. The method for preparing novel regenerated ceramsite according to claim 1, wherein the addition amount of sodium humate and sodium lignosulfonate is 0.5-1% of the weight of the semi-dry soil.
5. The method for preparing novel regenerated ceramsite according to claim 1, wherein the aging time in step S6 is 24-48 h.
6. The method for preparing novel regenerated ceramsite according to claim 1, wherein the roasting process in step S7 specifically comprises: and (3) conveying the granules into a roasting kiln, pre-burning for 20-40 min at 400-550 ℃, and then heating to 900-1100 ℃ for roasting for 40-80 min.
7. Novel regenerated ceramsite obtained by the preparation method according to any one of claims 1 to 6.
8. The use of the novel regenerated ceramsite of claim 7 in the fields of ceramsite blocks, ceramsite wallboards, and environmentally-friendly cured water permeable bricks.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573901A (en) * | 2020-12-14 | 2021-03-30 | 中国科学院过程工程研究所 | Method for preparing homogeneous porous ceramsite by using sludge and homogeneous porous ceramsite |
| CN113149510A (en) * | 2021-04-01 | 2021-07-23 | 安徽理工大学 | Method for modifying concrete recycled micro powder and application thereof |
| CN114477821A (en) * | 2022-02-16 | 2022-05-13 | 南京广兰建材科技有限公司 | Recycled ceramsite for lightweight aggregate concrete and preparation process thereof |
| CN115228886A (en) * | 2022-06-29 | 2022-10-25 | 中国联合工程有限公司 | Building waste resource utilization system and working method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112573901A (en) * | 2020-12-14 | 2021-03-30 | 中国科学院过程工程研究所 | Method for preparing homogeneous porous ceramsite by using sludge and homogeneous porous ceramsite |
| CN113149510A (en) * | 2021-04-01 | 2021-07-23 | 安徽理工大学 | Method for modifying concrete recycled micro powder and application thereof |
| CN113149510B (en) * | 2021-04-01 | 2022-02-08 | 安徽理工大学 | Method for modifying concrete recycled micro powder and application thereof |
| CN114477821A (en) * | 2022-02-16 | 2022-05-13 | 南京广兰建材科技有限公司 | Recycled ceramsite for lightweight aggregate concrete and preparation process thereof |
| CN115228886A (en) * | 2022-06-29 | 2022-10-25 | 中国联合工程有限公司 | Building waste resource utilization system and working method thereof |
| CN115228886B (en) * | 2022-06-29 | 2023-06-23 | 中国联合工程有限公司 | Construction waste recycling system and working method thereof |
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| CN110922202B (en) | 2022-06-03 |
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