CN108609986A - A kind of preparation method and application of the eco-concrete based on discarded gangue - Google Patents
A kind of preparation method and application of the eco-concrete based on discarded gangue 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
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F11/00—Other organic fertilisers
- C05F11/02—Other organic fertilisers from peat, brown coal, and similar vegetable deposits
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- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
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- C05G3/80—Soil conditioners
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- C12N1/20—Bacteria; Culture media therefor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/128—Coherent linings made on the spot, e.g. cast in situ, extruded on the spot
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- C04B2111/00017—Aspects relating to the protection of the environment
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- 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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Abstract
The present invention relates to a kind of preparation method and application of the eco-concrete based on discarded gangue, belong to solid waste resource utilization field.The present invention is by by weight 1440~1600 parts of 20~40mm gangues coarse aggregate, 180~210 parts of gangue cement, 50~57 parts of water, 45~52 parts of silicon ash, the material stirring of 5.0~5.5 parts of water-reducing agent, pouring molding.The earth material knead dough layer earth material of base containing bio-matrix of configuration is added after molding, formed compression strength reach 10MPa or more meet shore protection, afforestation project intensity eco-concrete, there is preferable anti-impact force, the present invention can be combined with plant, have catharsis to runoff rainwater and river water according to microorganism and plant collective effect.
Description
Technical field
The present invention relates to a kind of based on discarded gangue, the preparation method and application of eco-concrete, and it is useless to belong to solid
Object recycling field.
Background technology
In the today for advocating green economy, as social and economic activities produce the increase to coal resources demand, bastard coal
Stone burden is also increasing, this problem is increasingly becoming that china natural resources efficiently use and the main of utilization of coal gangue is appointed
Business.
Gangue is the solid waste generated in coal production and process, and annual discharge capacity is equivalent to current year coal
10% or so of carbon yield has added up more than 30 hundred million tons of stockpiling at present, takes up an area about 1.2 ten thousand hectares, is that current China's discharge capacity is maximum
One of industrial solid castoff.Coal in China system will also give off nearly 100,000,000 tons of gangues every year now.With national economy
Development, coal demand total amount is continuously increased, and the yield of gangue can also be significantly increased, and gangue environmental pollution has become
One of coal in China industry environmental problem the most outstanding.Gangue is a kind of natural resources for development and utilization again, must
It must rely on scientific and technological advances and sufficient recycling is carried out to gangue, turn waste into wealth, reduce gangue to caused by environment
Harm.
Since the content of two iron of silica, alundum (Al2O3) and titanium dioxide in gangue is generally all 80% or more,
Meet the clay dispensing requirements that clay dispensing fires ordinary cement and certain special cements and clinker-free cement, therefore gangue
It can be as the natural clay matter raw material of production cement.And the gangue cement produced can continue to be utilized, and produce
Eco-concrete, the important building materials as plant-growing type eco-concrete shore protection.
Invention content
Discarded gangue is made full use of to prepare eco-concrete the object of the present invention is to provide a kind of, the eco-concrete
Portland cement is replaced by gangue cement, rubble coarse aggregate is replaced by gangue coarse aggregate；It provides a kind of abundant
Gangue cement is prepared using discarded gangue, which prepares water for common clay using coal gangue subculture as raw material
Mud；The proportioning of the various microorganisms of complex microbial inoculum is provided.
The technical solution adopted by the present invention is：It a kind of preparation method of the eco-concrete based on discarded gangue and answers
With, which is characterized in that include the following steps：
1) the gangue coarse aggregate of 20~40mm is filtered out；
2) by weight 180 parts~210 parts gangue cements, 45~52 parts of silicon ashes, 1550~1600 parts of gangues are thick
Aggregate dry mixing 0.5min, makes material be evenly distributed；
It is 3) last to amount to stirring 2min by weight 50~57 parts of water, 5.0~5.5 parts of water-reducing agents stirring 1.5min are added,
Obtain eco-concrete.
A kind of preparation method of the eco-concrete based on discarded gangue, the preparation method of gangue cement in step 2)
For：
1) gangue for adding 20% lime stone is calcined at 1200 DEG C, chilling of spraying water at high operating temperatures after calcining,
And it by residual heat drying, forms water quenching coal and destroys stone；
2) by gangue grinding specific surface area to 510m2/ kg, clinker grinding specific surface area to 350m2/ kg, slag and fine coal
Grey grinding specific surface area is thoroughly mixed to 400m2/kg.
Gangue cement described in step 2) is made of bastard coal mountain flour, Portland clinker, clinker and gypsum.
The gangue cement, by weight, 20~30 parts of bastard coal stone powder, 0~5 part of slag and fine coal ashes
End, 5~10 parts of gypsum and 55~60 parts of Portland clinker.
The application of a kind of eco-concrete based on discarded gangue in ecological revetment, which is characterized in that method is as follows：
1) rear direct pouring molding is stirred in eco-concrete at the scene, obtains concrete skeleton structure；
2) by base's earth material, by weight, planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=28:
In hole in 1.39: 0.35: 0.22: 0.14 mixing filling concrete skeleton structure；
3) by face layer earth material, by weight, planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=
47.45: 2: 1: 0.5: 0.32 mixing, covers 5cm on concrete skeleton.
The preparation method of complex microbial inoculum according to step 2) and step 3) is as follows：
1) in mass ratio by water:Peptone:Yeast extract:NaCl=19:2:1:Liquid fermentation liquid is made in 2 ratio；
2) by bacillus subtilis, bacillus megaterium, Pseudomonas stutzeri, vesicular-arbuscular mycorrhiza, Trichoderma viride, thin Huang
Streptomycete is cultivated in liquid fermentation liquid respectively, obtains the liquid bacterial agent of each microbial bacteria, in mass ratio, bacillus subtilis:
Bacillus megaterium:Pseudomonas stutzeri:Vesicular-arbuscular mycorrhiza:Trichoderma viride:Streptomyces microflavus is about=2:2:2:6:3:3 is mixed
It closes, obtains liquid microbe composite bacteria agent；
3) liquid microbe composite bacteria agent is freeze-dried, obtains the microbial composite bacteria powder.
The beneficial effects of the invention are as follows：
1) microbial bacterial agent prepared by the present invention can promote the growth of plant, have to the pollutant of rainfall runoff and river water
Certain removal effect.
2) gangue cement solves what discarded gangue utilized again by coal gangue subculture for the clay in conventional cement
Problem.
3) not only the intensity with 10MPa or more, compound shore protection requirement also have abundant battalion to gangue eco-concrete
The growth that substance promotes plant is supported, solves the problems, such as the utilization again of discarded gangue.
Description of the drawings
Fig. 1：The structural schematic diagram of gangue ecological concrete block.
Fig. 2：The construction drawing of gangue eco-concrete shore protection.
Fig. 3：The design sketch of gangue eco-concrete shore protection.
Specific implementation mode
A kind of preparation method and application of the eco-concrete based on discarded gangue, which is characterized in that including walking as follows
Suddenly：
1) the gangue coarse aggregate of 20~40mm is filtered out；
2) by weight 180 parts~210 parts gangue cements, 45~52 parts of silicon ashes, 1550~1600 parts of gangues are thick
Aggregate dry mixing 0.5min, makes material be evenly distributed；
It is 3) last to amount to stirring 2min by weight 50~57 parts of water, 5.0~5.5 parts of water-reducing agents stirring 1.5min are added,
Obtain eco-concrete.
A kind of preparation method of the eco-concrete based on discarded gangue, the preparation method of gangue cement in step 2)
For：
1) gangue for adding 20% lime stone is calcined at 1200 DEG C, chilling of spraying water at high operating temperatures after calcining,
And it by residual heat drying, forms water quenching coal and destroys stone；
2) by gangue grinding specific surface area to 510m2/ kg, clinker grinding specific surface area to 350m2/ kg, slag and fine coal
Grey grinding specific surface area is thoroughly mixed to 400m2/kg.
Gangue cement described in step 2) is made of bastard coal mountain flour, Portland clinker, clinker and gypsum.
The gangue cement, by weight, 20~30 parts of bastard coal stone powder, 0~5 part of slag and fine coal ashes
End, 5~10 parts of gypsum and 55~60 parts of Portland clinker.
The application of a kind of eco-concrete based on discarded gangue in ecological revetment, which is characterized in that method is as follows：
1) rear direct pouring molding is stirred in eco-concrete at the scene, obtains concrete skeleton structure；
2) by base's earth material, by weight, planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=28:
In hole in 1.39: 0.35: 0.22: 0.14 mixing filling concrete skeleton structure；
3) by face layer earth material, by weight, planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=
47.45: 2: 1: 0.5: 0.32 mixing, covers 5cm on concrete skeleton.
The preparation method of complex microbial inoculum according to step 2) and step 3) is as follows：
1) in mass ratio by water:Peptone:Yeast extract:NaCl=19:2:1:Liquid fermentation liquid is made in 2 ratio；
2) by bacillus subtilis, bacillus megaterium, Pseudomonas stutzeri, vesicular-arbuscular mycorrhiza, Trichoderma viride, thin Huang
Streptomycete is cultivated in liquid fermentation liquid respectively, obtains the liquid bacterial agent of each microbial bacteria, in mass ratio, bacillus subtilis:
Bacillus megaterium:Pseudomonas stutzeri:Vesicular-arbuscular mycorrhiza:Trichoderma viride:Streptomyces microflavus is about=2:2:2:6:3:3 is mixed
It closes, obtains liquid microbe composite bacteria agent；
3) liquid microbe composite bacteria agent is freeze-dried, obtains the microbial composite bacteria powder.
Embodiment 1：
(1) preparation of gangue cement：
Take the gangue fetched from Tieling coal mining area, chemical composition such as table 1.The coal of 20% lime stone will be added
Spoil is calcined at 1200 DEG C, chilling of spraying water at high operating temperatures after calcining, and by residual heat drying, forms water quenching gangue.
Table 1
| Ingredient | SiO2 | Al2O3 | CaO | MgO | Fe2O3 | Na2O+K2O |
| Ratio (%) | 55 | 21 | 6 | 3 | 7 | 1.5 |
By gangue grinding specific surface area to 510m2/ kg, clinker grinding specific surface area to 350m2/ kg, slag and flyash
Grinding specific surface area is to 400m2/ kg, is thoroughly mixed, and obtains gangue cement.
(2) preparation of complex microbial inoculum:
By bacillus subtilis, bacillus megaterium, Pseudomonas stutzeri, vesicular-arbuscular mycorrhiza, Trichoderma viride, thin yellow chain
Mould is cultivated respectively, the liquid fermentation liquid of each microbial bacteria is obtained, by bacillus subtilis:Bacillus megaterium:Amur is false single
Born of the same parents bacterium:Vesicular-arbuscular mycorrhiza:Trichoderma viride:Streptomyces microflavus is about 2:2:2:6:3:3 ratio mixing.Liquid bacterial agent is freezed
It is dry, obtain the microbial composite bacteria powder.
Embodiment 2：
(1) preparation of Nutrition Soil：
According to planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=28: 1.39: 0.35: 0.22:
0.14 ratio is mixed to prepare base's earth material；According to planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=
47.45: 2: 1: 0.5: 0.32 ratio is mixed to prepare face layer earth material.
(2) preparation of eco-concrete skeleton structure:
The gangue fetched from Tieling coal mining area is taken, the gangue coarse aggregate of 20~40mm is filtered out, coal is added
The materials dry mixing 0.5min such as spoil cement, silicon ash, is that material is evenly distributed, and is eventually adding the stirring of the additives such as water, water-reducing agent
1.5min amounts to stirring 2min.Rear direct pouring molding is stirred in eco-concrete at the scene, obtains concrete skeleton structure.
(3) preparation of ecological concrete block：
Base's earth material is poured into the gap of concrete skeleton after filling up, by face layer earth material earthing 5cm, finally plantation is planted
Object.Obtain vegetation type gangue ecological concrete block, such as Fig. 1.Component is entitled in figure：Anchor pole I1, face layer earth material 2, anchor pole
3, base's earth material 4, concrete skeleton structure 5, backfill soil moved in improve the original 6.Face layer earth material thickness is 5cm, and backfill soil moved in improve the original thickness 6 is 5cm, anchor
3 spacing 100cm of bar 1 and anchor pole.
Embodiment 3：
(1) enforcement place：
It is muddy to plant stem red-spotted stonecrop structure ecological revetment improvement of crouching using eco-concrete on the Hun River Shen riverbanks Fu Duan for enforcement place
A section polluted water body is comforted in river Shen, such as Fig. 2,3.Anchor pole II2-1, sash beam expansion joint 2-2, sash beam 2-3, ecological coagulation in Fig. 2
Solidifying earth building blocks 2-4.3-1 ecologies coagulation coagulates earth building blocks in Fig. 3.
Pollution of estuary situation such as table 2.
Table 2
| River water (mg/L) | Slight pollution (mg/L) | Intermediate pollution (mg/L) | Serious pollution (mg/L) | |
| Total nitrogen content | 11.7 | 2.5 | 5 | 10 |
| Total phosphorus content | 1.63 | 0.4 | 0.8 | 1.6 |
| COD contents | 46 | 46 | 46 | 46 |
| BOD contents | 5.8 | 5.8 | 5.8 | 5.8 |
(2) regulation effect of the ecological revetment of eco-concrete structure to the water of river water and different pollution levels：
Method：Take Hun River river water in the bucket of sampling, by national quality standard of water environment, design is light, in, three kinds of severe
The contaminant water of degree, TN contents are respectively 2mg/L, 4mg/L, 8mg/L in water, TP contents be respectively 0.4mg/L, 0.8mg/L,
1.6mg/L, BOD content 5.8mg/L and COD content 46mg/L, using river water as reference, 4 gradients altogether.With free of contamination
Surface water, the plot being slowly impregnated with, the moisture in soil reach saturation state, simulate rainwash, referred to according to river water and pollution
The sequence slow (avoiding washing away) of concentration contaminant water from low to high is counted by sample area, passes through sample area underground outlet section and intercepts earth's surface diameter
Stream.It repeats to every piece of sample to take 3 samples, takes 12 water samples altogether to one piece of sample, water sample is put into ready cleaning plastic bottle, 4
It is preserved under degree Celsius, then takes back laboratory and quickly measure.
As can be seen from Table 3, the ecological revetment of eco-concrete structure reaches the reduction rate of the water TN of serious pollution
59.5%, 62.9% is reached to the reduction rate of the TN of river water；88.3% is reached to the TP reduction rates of serious pollution, to the TP of river water
Reduction rate reaches 92.4%；67% or so is reached to the reduction rate of COD, 58% or so is reached to the reduction rate of BOD.
Table 3
Claims (7)
1. a kind of preparation method and application of the eco-concrete based on discarded gangue, which is characterized in that include the following steps：
1) the gangue coarse aggregate of 20~40mm is filtered out；
2) by weight by 180 parts~210 parts gangue cements, 45~52 parts of silicon ashes, 1550~1600 parts of gangue coarse aggregates
Dry mixing 0.5min, makes material be evenly distributed；
3) last by weight 50~57 parts of water, 5.0~5.5 parts of water-reducing agents stirring 1.5min are added, stirring 2min is amounted to, is obtained
Eco-concrete.
2. a kind of preparation method of eco-concrete based on discarded gangue according to claim 1, coal in step 2)
The preparation method of spoil cement is：
1) gangue for adding 20% lime stone is calcined, chilling of spraying water at high operating temperatures after calcining at 1200 DEG C, and led to
Residual heat drying is crossed, water quenching coal is formed and destroys stone；
2) by gangue grinding specific surface area to 510m2/ kg, clinker grinding specific surface area to 350m2/ kg, slag and fine coal ashes
Specific surface area is ground to 400m2/ kg, is thoroughly mixed.
3. a kind of preparation method of eco-concrete based on discarded gangue according to claim 1, it is characterised in that：
Gangue cement described in step 2) is made of bastard coal mountain flour, Portland clinker, clinker and gypsum.
4. a kind of preparation method of eco-concrete based on discarded gangue according to claim 1 or 3, feature exist
In：The gangue cement, by weight, 20~30 parts of bastard coal stone powder, 0~5 part of slag and flyash powder, 5
~10 parts of gypsum and 55~60 parts of Portland clinker.
5. a kind of application of the eco-concrete based on discarded gangue described in claim 1 in ecological revetment.
6. according to the application described in claim 5, which is characterized in that method is as follows：
1) rear direct pouring molding is stirred in eco-concrete at the scene, obtains concrete skeleton structure；
2) by base's earth material, by weight, planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=28: 1.39
: in the hole in 0.35: 0.22: 0.14 mixing filling concrete skeleton structure；
3) by face layer earth material, by weight, planting soil: humus: complex microbial inoculum: composite fertilizer: organic fertilizer=47.45: 2
: 1: 0.5: 0.32 mixing covers 5cm on concrete skeleton.
7. application according to claim 6, it is characterised in that：Complex microbial inoculum in the step 2) and step 3)
Preparation method it is as follows：
1) in mass ratio by water:Peptone:Yeast extract:NaCl=19:2:1:Liquid fermentation liquid is made in 2 ratio；
2) by bacillus subtilis, bacillus megaterium, Pseudomonas stutzeri, vesicular-arbuscular mycorrhiza, Trichoderma viride, thin yellow strepto-
Bacterium is cultivated in liquid fermentation liquid respectively, obtains the liquid bacterial agent of each microbial bacteria, in mass ratio, bacillus subtilis:It is huge
Bacillus:Pseudomonas stutzeri:Vesicular-arbuscular mycorrhiza:Trichoderma viride:Streptomyces microflavus is about=2:2:2:6:3:3 mixing, obtain
To liquid microbe composite bacteria agent；
3) liquid microbe composite bacteria agent is freeze-dried, obtains the microbial composite bacteria powder.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109053062A (en) * | 2018-10-19 | 2018-12-21 | 沈阳建筑大学 | A kind of coal gangue concrete and the preparation method and application thereof |
| CN111233408A (en) * | 2020-03-19 | 2020-06-05 | 河南理工大学 | Coal gangue chemical foaming concrete and preparation method thereof |
| CN113026770A (en) * | 2021-03-03 | 2021-06-25 | 重庆德润新邦环境修复有限公司 | Ecological management method for coal gangue dump |
| CN114773014A (en) * | 2022-04-19 | 2022-07-22 | 中建八局第三建设有限公司 | Plant-growing type light permeable pavement material and preparation method thereof |
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| CN111233408A (en) * | 2020-03-19 | 2020-06-05 | 河南理工大学 | Coal gangue chemical foaming concrete and preparation method thereof |
| CN113026770A (en) * | 2021-03-03 | 2021-06-25 | 重庆德润新邦环境修复有限公司 | Ecological management method for coal gangue dump |
| CN114773014A (en) * | 2022-04-19 | 2022-07-22 | 中建八局第三建设有限公司 | Plant-growing type light permeable pavement material and preparation method thereof |
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Application publication date: 20181002 |