CN108689664A - A kind of environment-friendly concrete and preparation method thereof - Google Patents
A kind of environment-friendly concrete and preparation method thereof Download PDFInfo
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- CN108689664A CN108689664A CN201810703780.4A CN201810703780A CN108689664A CN 108689664 A CN108689664 A CN 108689664A CN 201810703780 A CN201810703780 A CN 201810703780A CN 108689664 A CN108689664 A CN 108689664A
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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
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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
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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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)
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- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to building material technical fields, and in particular to a kind of environment-friendly concrete and preparation method thereof.The group of the environment-friendly concrete becomes, the special cement, 10-20 parts of fine sand, 20-30 parts of crystal glass ornaments processing waste residue, 3-8 parts of reinforcing agent, 2-5 parts of toughener, 60-100 parts of tap water, 5-10 parts of water-reducing agent, 8-12 parts of curing agent of 40-50 parts of mass fraction meter;Environment-friendly concrete prepared by the present invention; the prices of raw materials are low; and the reasonable employment that the crystal glass ornaments processing waste residue being added is Industrial Solid Waste opens the roads Tiao Xin, and the chemical reaction at the same time occurred in solidification process, forming cross-linked structure improves the mechanical strength of cement.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of environment-friendly concrete and preparation method thereof.
Background technology
In 108083748 A of patent No. CN, a kind of quick-setting concrete and preparation method thereof is disclosed, is pressed
Mass percent includes:Flyash 8-16%, lime 6-15%, gypsum 5-15%, 3 .5-8 .5% of calcium carbonate, amino methyl
7 .5-14 .5% of propyl alcohol, 6 .5-10 .5% of titanium dioxide, 2 .5-4 .5% of reclaimed sand, recycled aggregate 8-11%, emulsified asphalt
12-18%, aqueous polyurethane emulsion 12-14%, lithium bentonite 2-4%, calcined kaolin 8-13 .5%, 2 .5- of water-reducing agent
4 .5%, enhancing component 13-25%, 11 .5-16 .5% of active constituent, curing component 10-15%.The rapid curing of the invention
Concrete can improve the curing rate of concrete, and the intensity after concrete setting can be significantly increased, avoid concrete
Crack, but due to being added to aminomethylpropanol, aqueous polyurethane emulsion makes production cost increase substantially.Cause
This, if the production cost of concrete can be reduced with rapid curing and under the premise of do not change mechanical strength solving concrete
It is particularly important.
Invention content
In order to achieve the purpose that in background technology, a kind of environment-friendly concrete of present invention proposition and preparation method thereof, the present invention
The environment-friendly concrete of preparation, the prices of raw materials are low, and the crystal glass ornaments processing waste residue being added is the reasonable of Industrial Solid Waste
Using the roads Tiao Xin are opened, the chemical reaction at the same time occurred in solidification process forms cross-linked structure and greatly improves
The mechanical strength of cement.
The present invention realizes by the following technical solutions:
A kind of environment-friendly concrete and preparation method thereof, which is characterized in that the group of the environment-friendly concrete becomes, mass fraction meter
40-50 parts of special cement, 10-20 parts of fine sand, 20-30 parts crystal glass ornaments processing waste residue, 3-8 parts of reinforcing agent,
2-5 parts of toughener, 60-100 parts of tap water, 5-10 parts of water-reducing agent, 8-12 parts of curing agent.
Further, the environment-friendly concrete and preparation method thereof is, by 40-50 parts of special cement, 10-20 parts thin
Husky, 20-30 parts crystal glass ornaments process waste residue, 3-8 parts of reinforcing agent, 2-5 parts of toughener and are added in mixture and mix
Uniformly, 5-10 parts of water-reducing agent, 8-12 parts of curing agent are added in reaction kettle, after mixing 4-5 minutes, stop batch mixing, by this
Substance carries out hybrid packed, places in a dry environment, which is exactly environment-friendly concrete, and when use is directly added into 60-100
The tap water of part is after mixing directly poured obtained batch mixing material, and the substance voluntarily cures after 8 hours, because
The concrete strength that this is obtained is very high.
Further, the special cement is, by 60-80 parts of portland cement, 5-10 parts of aluminium chloride, 4-8 parts
Calcium oxide, 1-3 parts of urea, 2-5 parts of phosphate are separately added into ball mill and are ground, and it is 300- to be ground into granular size
Then material is added in batch mixer and mixes, after mixing, which is sealed preservation by 500 mesh powders, should
Material is exactly special cement, added in the special cement of preparation urea increase with crystal glass ornaments processing waste residue, reinforcing agent,
The intermiscibility of toughener etc., while the addition mechanical property not only at low cost and increasing cement of aluminium chloride and calcium oxide.
Further, the reinforcing agent is, by mass fraction be 1-2 part Thunder God vinc fiber, 10-20 parts of asbestos fibre
Dimension, 20-30 parts of aluminium oxide, 5-10 parts of glass fibre, 2-6 parts of silane coupling agent are added in reaction kettle, in 40-60 DEG C of item
The substance obtained after carrying out reaction under part 2 hours, the substance are exactly reinforcing agent, and Thunder God vinc fiber is gone back while having humidification
Have the effect of that insecting driving insect, glass fibre, asbestos fibre occur centainly under the action of silane coupling agent with the hydroxyl of cement
Cross-linking reaction, can effectively enhance mechanical strength, while also to promote cement to be processed with crystal glass ornaments useless for silane coupling agent
Certain cross-linking reaction occurs for the crystal glass particle surface in slag, further enhances mechanical strength.
Further, the toughener is to be catalyzed the organosilicon of 10-20 parts of formaldehyde, 10-15 parts MDI, 3-5 part
The substance obtained after mixing in batch mixer is added in agent, 4-6 parts of rubber powders, 40-50 parts of special cement, is mixing
Temperature is controlled in journey at 20-30 DEG C, which is exactly toughener, and the addition of special cement makes toughener and other materials compatibility
It is good, and reacted with formaldehyde, rubber powder, MDI so that not only intensity is high and toughness is big.
Further, the water-reducing agent is, by 10-20 parts of poly- sodium acetate, 5-10 parts of sodium sulphate, 2-5 parts anhydrous
Calcium chloride, 8-10 parts of starch is added in batch mixer, then carries out the substance obtained after high-speed stirred, which is exactly diminishing
Agent, the substance effectively reduce the use of water, more efficiently cure.
Further, the curing agent is, by 4-5 parts of sodium metasilicate, 1-2 parts of malic acid, 10-15 parts of sodium carbonate,
4-10 parts of sodium phosphate, 10-20 parts of special cement are uniformly mixed under the conditions of 50-60 DEG C, are obtained after being cooled to room temperature crushing
Substance, which is exactly curing agent, pass through chemical reaction, generate reticular structure.
Further, crystal glass ornaments processing waste residue is that crystal glass ornaments are processed waste residue to pass through separating treatment
Main component is the waste residue of crystal glass and a small amount of remaining polishing powder, removes the laggard row of impurity and is crushed to 200-300 mesh, artificial water
Brilliant ornaments are to be processed into variously-shaped ornaments or work by processes such as machine cuts, grinding, polishings using crystal glass as raw material
Skill product will produce a large amount of glass powder in production process, polishing powder from rare earth, the water drilling of resinoid bond package are fixed on fixture
When adhesive, the machine oil etc. that use, the ingredients such as rosin, shellac, calcium carbonate, calcium hydroxide are typically contained in adhesive, are passed through
After the separating treatment of the prior art, remaining waste residue main component is crystal glass and a small amount of polishing powder.
Beneficial to benefit
1, environment-friendly concrete prepared by the present invention, while special cement is effectively guaranteed its intensity, reinforcing agent further carries
The intensity of high cement, while the addition of toughener effectively improves the problem that strength of cement is high and flexibility is poor;
2, the present invention by be added crystal glass ornaments process waste residue, rationally effectively use Industrial Solid Waste, become give up into
Treasured makes tremendous contribution to sustainable development, while also having opened up the utilization ways to Industrial Solid Waste;
3, it by the present invention in that making composite soil cure with curing agent, chemically reacts in the process, forms network-like structure, contract
The intensity of concrete is effectively guaranteed while short hardening time.
Specific implementation mode
In order to keep the purpose of the present invention, technical solution and advantageous effect clearer, below in conjunction with experimental data, to this
The preferred embodiment of invention is described in detail, to facilitate the technical staff to understand.
Embodiment 1
A kind of preparation method of environment-friendly concrete includes the following steps:
(1) 75 parts of portland cement, 8 parts of aluminium chloride, 7 parts of calcium oxide, 2 parts of urea, 4 parts of phosphate are added respectively
Enter in ball mill and be ground, it is 500 mesh powders to be ground into granular size, and then material is added in batch mixer and mixes
It closes, after mixing, which is sealed preservation, which is exactly special cement.
(2) it is 2 parts of Thunder God vinc fiber, 20 parts of asbestos fibre, 25 parts of aluminium oxide, 8 parts of glass by mass fraction
Fiber, 4 parts of silane coupling agent are added in reaction kettle, the substance obtained after reaction being carried out under the conditions of 50 DEG C 2 hours, the substance
It is exactly reinforcing agent.
(3) by 15 parts of formaldehyde, 13 parts of MDI, 4 parts of organic Si catalyst, 5 parts of rubber powders, 45 parts of special cement
The substance obtained after mixing in batch mixer is added, temperature is controlled in mixed process at 25 DEG C, which is exactly to increase
Tough dose.
(4) batch mixer is added in 18 parts of poly- sodium acetate, 8 parts of sodium sulphate, 4 parts of anhydrous calcium chloride, 10 parts of starch
In, the substance obtained after high-speed stirred is then carried out, which is exactly water-reducing agent.
(5) by 5 parts of sodium metasilicate, 2 parts of malic acid, 13 parts of sodium carbonate, 8 parts of sodium phosphate, 15 parts of special cement,
It is uniformly mixed under the conditions of 55 DEG C, is cooled to room temperature the substance obtained after crushing, which is exactly curing agent.
(6) by 45 parts of special cement, 15 parts of fine sand, 25 parts of crystal glass ornaments processing waste residue, 5 parts of enhancing
Agent, 3 parts of toughener are added in mixture and are uniformly mixed, and 8 parts of water-reducing agent, 10 parts of curing agent are added in reaction kettle, mixed
It closes after five minutes, stops batch mixing, substance progress is hybrid packed, it places in a dry environment, which is exactly environmentally friendly coagulation
Soil, the tap water that when use is directly added into 100 parts are directly poured obtained batch mixing material, 8 is small after mixing
When after the substance voluntarily cure.
Embodiment 2
A kind of preparation method of environment-friendly concrete includes the following steps:
(1) 65 parts of portland cement, 6 parts of aluminium chloride, 5 parts of calcium oxide, 3 parts of urea, 4 parts of phosphate are added respectively
Enter in ball mill and be ground, it is 350 mesh powders to be ground into granular size, and then material is added in batch mixer and mixes
It closes, after mixing, which is sealed preservation, which is exactly special cement.
(2) it is 2 parts of Thunder God vinc fiber, 18 parts of asbestos fibre, 24 parts of aluminium oxide, 7 parts of glass by mass fraction
Fiber, 5 parts of silane coupling agent are added in reaction kettle, the substance obtained after reaction being carried out under the conditions of 45 DEG C 2 hours, the substance
It is exactly reinforcing agent.
(3) by 18 parts of formaldehyde, 13 parts of MDI, 3 parts of organic Si catalyst, 6 parts of rubber powders, 50 parts of special cement
The substance obtained after mixing in batch mixer is added, temperature is controlled in mixed process at 20-30 DEG C, which is exactly
Toughener.
(4) batch mixer is added in 16 parts of poly- sodium acetate, 6 parts of sodium sulphate, 4 parts of anhydrous calcium chloride, 10 parts of starch
In, the substance obtained after high-speed stirred is then carried out, which is exactly water-reducing agent.
(5) by 4 parts of sodium metasilicate, 1 part of malic acid, 11 parts of sodium carbonate, 8 parts of sodium phosphate, 18 parts of special cement,
It is uniformly mixed under the conditions of 55 DEG C, is cooled to room temperature the substance obtained after crushing, which is exactly curing agent.
(6) by 44 parts of special cement, 18 parts of fine sand, 28 parts of crystal glass ornaments processing waste residue, 6 parts of enhancing
Agent, 4 parts of toughener are added in mixture and are uniformly mixed, and 7 parts of water-reducing agent, 12 parts of curing agent are added in reaction kettle, mixed
It closes after five minutes, stops batch mixing, substance progress is hybrid packed, it places in a dry environment, which is exactly environmentally friendly coagulation
Soil, the tap water that when use is directly added into 100 parts are directly poured obtained batch mixing material, 8 is small after mixing
When after the substance voluntarily cure.
Embodiment 3
A kind of preparation method of environment-friendly concrete includes the following steps:
(1) 70 parts of portland cement, 6 parts of aluminium chloride, 7 parts of calcium oxide, 3 parts of urea, 4 parts of phosphate are added respectively
Enter in ball mill and be ground, it is 350 mesh powders to be ground into granular size, and then material is added in batch mixer and mixes
It closes, after mixing, which is sealed preservation, which is exactly special cement.
(2) it is 2 parts of Thunder God vinc fiber, 12 parts of asbestos fibre, 28 parts of aluminium oxide, 8 parts of glass by mass fraction
Fiber, 4 parts of silane coupling agent are added in reaction kettle, the substance obtained after reaction being carried out under the conditions of 40 DEG C 2 hours, the substance
It is exactly reinforcing agent.
(3) by 15 parts of formaldehyde, 12 parts of MDI, 3 parts of organic Si catalyst, 4 parts of rubber powders, 45 parts of special cement
The substance obtained after mixing in batch mixer is added, temperature is controlled in mixed process at 30 DEG C, which is exactly to increase
Tough dose.
(4) batch mixer is added in 16 parts of poly- sodium acetate, 6 parts of sodium sulphate, 3 parts of anhydrous calcium chloride, 10 parts of starch
In, the substance obtained after high-speed stirred is then carried out, which is exactly water-reducing agent.
(5) by 4 parts of sodium metasilicate, 2 parts of malic acid, 13 parts of sodium carbonate, 8 parts of sodium phosphate, 16 parts of special cement,
It is uniformly mixed under the conditions of 55 DEG C, is cooled to room temperature the substance obtained after crushing, which is exactly curing agent.
(6) by 46 parts of special cement, 14 parts of fine sand, 28 parts of crystal glass ornaments processing waste residue, 4 parts of enhancing
Agent, 4 parts of toughener are added in mixture and are uniformly mixed, and 6 parts of water-reducing agent, 8 parts of curing agent are added in reaction kettle, mixed
It closes after five minutes, stops batch mixing, substance progress is hybrid packed, it places in a dry environment, which is exactly environmentally friendly coagulation
Soil, the tap water that when use is directly added into 100 parts are directly poured obtained batch mixing material, 8 is small after mixing
When after the substance voluntarily cure.
Embodiment 4
A kind of preparation method of environment-friendly concrete includes the following steps:
(1) 80 parts of portland cement, 5 parts of aluminium chloride, 8 parts of calcium oxide, 3 parts of urea, 2 parts of phosphate are added respectively
Enter in ball mill and be ground, it is 500 mesh powders to be ground into granular size, and then material is added in batch mixer and mixes
It closes, after mixing, which is sealed preservation, which is exactly special cement.
(2) it is 2 parts of Thunder God vinc fiber, 12 parts of asbestos fibre, 30 parts of aluminium oxide, 10 parts of glass by mass fraction
Fiber, 2 parts of silane coupling agent are added in reaction kettle, the substance obtained after reaction being carried out under the conditions of 40 DEG C 2 hours, the substance
It is exactly reinforcing agent.
(3) by 20 parts of formaldehyde, 11 parts of MDI, 3 parts of organic Si catalyst, 6 parts of rubber powders, 48 parts of special cement
The substance obtained after mixing in batch mixer is added, temperature is controlled in mixed process at 25 DEG C, which is exactly to increase
Tough dose.
(4) batch mixer is added in 14 parts of poly- sodium acetate, 8 parts of sodium sulphate, 4 parts of anhydrous calcium chloride, 10 parts of starch
In, the substance obtained after high-speed stirred is then carried out, which is exactly water-reducing agent.
(5) by 5 parts of sodium metasilicate, 2 parts of malic acid, 13 parts of sodium carbonate, 6 parts of sodium phosphate, 16 parts of special cement,
It is uniformly mixed under the conditions of 55 DEG C, is cooled to room temperature the substance obtained after crushing, which is exactly curing agent.
(6) by 48 parts of special cement, 16 parts of fine sand, 24 parts of crystal glass ornaments processing waste residue, 6 parts of enhancing
Agent, 4 parts of toughener are added in mixture and are uniformly mixed, and 8 parts of water-reducing agent, 9 parts of curing agent are added in reaction kettle, mixed
It closes after five minutes, stops batch mixing, substance progress is hybrid packed, it places in a dry environment, which is exactly environmentally friendly coagulation
Soil, the tap water that when use is directly added into 60 parts are directly poured obtained batch mixing material, 6 hours after mixing
The substance voluntarily cures afterwards.
Experimental analysis
Mechanics Performance Testing;Embodiment 1-4 and the market cement bought are poured and build up the identical block objects of size dimension, according to
The examination criteria of national standard GB11548-89/GB1039-79 and GB9341-88/GB9342-88 carry out mechanical property inspection to it respectively
It surveys, testing result is as shown in the table
| Number | Tensile strength (MPa) | Shock strength(KJ/m2) |
| Embodiment 1 | 230-240 | 330-340 |
| Embodiment 2 | 230-240 | 330-340 |
| Embodiment 3 | 240-250 | 340-350 |
| Embodiment 4 | 220-225 | 290-300 |
| Cement preparation is sold in market | 120-150 | 230-250 |
As seen from the above table, the mechanical performance of concrete that prepared by the present invention is better than the product of market purchase, and meets relevant criterion,
Therefore it can put into production.
Finally illustrate, preferred embodiment above is only used to illustrate the technical scheme of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, defined by claims of the present invention.
Claims (8)
1. a kind of environment-friendly concrete and preparation method thereof, which is characterized in that the group of the environment-friendly concrete becomes, mass fraction meter
The special cement of 40-50 parts, 10-20 parts of fine sand, 20-30 parts of crystal glass ornaments processing waste residue, 3-8 parts of enhancing
Agent, 2-5 parts of toughener, 60-100 parts of tap water, 5-10 parts of water-reducing agent, 8-12 parts of curing agent.
2. a kind of environment-friendly concrete according to claim 1 and preparation method thereof, which is characterized in that the environmentally friendly coagulation
Soil and preparation method thereof is to process 40-50 parts of special cement, 10-20 parts of fine sand, 20-30 parts of crystal glass ornaments
Waste residue, 3-8 parts of reinforcing agent, 2-5 parts toughener be added mixture in be uniformly mixed, by 5-10 parts of water-reducing agent, 8-12 parts
Curing agent be added reaction kettle in, mixing 4-5 minute after, stop batch mixing, by the substance progress it is hybrid packed, be placed on dry
In environment, which is exactly environment-friendly concrete, and when use is directly added into 60-100 parts of tap water, after mixing, by gained
To batch mixing material directly poured, the substance voluntarily cures after 8 hours, therefore obtained concrete strength is very high.
3. a kind of environment-friendly concrete according to claim 1 and preparation method thereof, which is characterized in that the special cement
For by 60-80 parts of portland cement, 5-10 parts of aluminium chloride, 4-8 parts of calcium oxide, 1-3 parts of urea, 2-5 parts of phosphoric acid
Salt is separately added into ball mill and is ground, and it is 300-500 mesh powders to be ground into granular size, and batch mixing then is added in material
It is mixed in machine, after mixing, which is sealed preservation, which is exactly special cement.
4. a kind of environment-friendly concrete according to claim 1 and preparation method thereof, which is characterized in that the reinforcing agent
For, by mass fraction be 1-2 parts of Thunder God vinc fiber, 10-20 parts of asbestos fibre, 20-30 parts of aluminium oxide, 5-10 parts of glass
Glass fiber, 2-6 parts of silane coupling agent is added in reaction kettle, the object obtained after reaction being carried out under the conditions of 40-60 DEG C 2 hours
Matter, the substance are exactly reinforcing agent.
5. a kind of environment-friendly concrete according to claim 1 and preparation method thereof, which is characterized in that the toughener
For by 10-20 parts of formaldehyde, organic Si catalyst of 10-15 parts MDI, 3-5 part, 4-6 parts of rubber powders, 40-50 parts of special type
The substance obtained after mixing in batch mixer is added in cement, and control temperature is at 20-30 DEG C in mixed process, the substance
It is exactly toughener.
6. a kind of environment-friendly concrete according to claim 1 and preparation method thereof, which is characterized in that the water-reducing agent
For batch mixing is added in 10-20 parts of poly- sodium acetate, 5-10 parts of sodium sulphate, 2-5 parts of anhydrous calcium chloride, 8-10 parts of starch
In machine, the substance obtained after high-speed stirred is then carried out, which is exactly water-reducing agent.
7. a kind of environment-friendly concrete according to claim 1 and preparation method thereof, which is characterized in that the curing agent
For by 4-5 parts of sodium metasilicate, 1-2 parts of malic acid, 10-15 parts of sodium carbonate, 4-10 parts of sodium phosphate, 10-20 parts of special type
Cement is uniformly mixed under the conditions of 50-60 DEG C, is cooled to room temperature the substance obtained after crushing, which is exactly curing agent.
8. a kind of environment-friendly concrete according to claim 2 and preparation method thereof, which is characterized in that the crystal glass
Ornaments processing waste residue is that it is crystal glass and a small amount of remnants that crystal glass ornaments, which are processed waste residue by separating treatment main component,
The waste residue of polishing powder removes the laggard row of impurity and is crushed to 200-300 mesh.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810703780.4A CN108689664A (en) | 2018-07-01 | 2018-07-01 | A kind of environment-friendly concrete and preparation method thereof |
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| CN201810703780.4A CN108689664A (en) | 2018-07-01 | 2018-07-01 | A kind of environment-friendly concrete and preparation method thereof |
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|---|---|---|---|---|
| CN115974477A (en) * | 2022-12-20 | 2023-04-18 | 北京工业大学 | Ultra-high performance concrete containing rare earth polishing powder waste and preparation method thereof |
| CN117229040A (en) * | 2023-11-13 | 2023-12-15 | 天津包钢稀土研究院有限责任公司 | Fly ash-based grouting material containing invalid rare earth polishing powder, and preparation method and application thereof |
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| CN117229040B (en) * | 2023-11-13 | 2024-01-23 | 天津包钢稀土研究院有限责任公司 | Fly ash-based grouting material containing invalid rare earth polishing powder, and preparation method and application thereof |
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