CN117778027A - Vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction, and preparation method and application thereof - Google Patents
Vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction, and preparation method and application thereof Download PDFInfo
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- CN117778027A CN117778027A CN202410205844.3A CN202410205844A CN117778027A CN 117778027 A CN117778027 A CN 117778027A CN 202410205844 A CN202410205844 A CN 202410205844A CN 117778027 A CN117778027 A CN 117778027A
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- 239000004567 concrete Substances 0.000 title claims abstract description 56
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 title claims abstract description 48
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000003607 modifier Substances 0.000 title claims abstract description 37
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- 239000011398 Portland cement Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 description 2
- 229910001424 calcium ion Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
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- 239000002028 Biomass Substances 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
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- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
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- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
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Landscapes
- Fertilizers (AREA)
Abstract
The invention discloses a vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction, and a preparation method and application thereof, and belongs to the technical field of ecological restoration. The vegetation concrete ecological modifier comprises the following components in parts by mass: 1-8 parts of biochar, 0.5-4.5 parts of organic phosphonic acid, 0.02-0.3 part of sulfur powder, 0.8-1.5 parts of organic fertilizer, 0.02-0.08 part of compound fertilizer, 0.02-0.12 part of slow release fertilizer, 0.01-0.05 part of water-retaining agent and 0.001-0.006 part of vulcanized bacterial agent. Mixing the ecological modifier with cement, organic matters and loam, adding slope protection plant seeds into the surface layer, adding a proper amount of water, and uniformly stirring to obtain vegetation concrete. The vegetation concrete not only has higher early strength and anti-scouring performance, but also can reduce the later alkalinity to about 8.0, and provides long-term fertility for plant growth.
Description
Technical Field
The invention belongs to the technical field of ecological restoration, and particularly relates to a vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction, and a preparation method and application thereof.
Background
In recent years, with the great development of national infrastructure construction, strong interference is caused to an ecological system, vegetation is greatly destroyed, secondary bare land is accompanied, and a series of ecological environment problems such as reduced biodiversity, reduced water conservation capacity, water and soil conservation function loss and the like occur in an engineering disturbance area, so that the environment, landscape and sustainable development of engineering sites and surrounding areas are seriously affected.
The vegetation concrete ecological protection technology is one of the effective means for solving the problems. Cement is used as binder for vegetation concrete spraying to improve the strength and anti-scouring performance of the base material, but the alkalinity of the base body is obviously increased due to cement hydration, the pH value is generally above 11, and the pH environment in which most plants are suitable for growing is 6.5-8.5. In addition, the problems of soil aggregate structure damage, soil hardening and the like can be caused, and the vegetation concrete ecological modifier needs to be added to solve the problems. The ecological modifier has the primary functions of reducing the pH value of the matrix, improving the soil aggregate structure and providing long-term fertility and retaining moisture for plant growth.
In the existing vegetation concrete ecological modifier, common components for reducing the pH of a matrix are gypsum, acid fertilizers (such as ferrous sulfate and superphosphate) and organic acids (such as citric acid, malic acid, oxalic acid and the like). These methods have the following problems: (1) The setting and hardening time of a cement soil system can be delayed, so that the early stage, especially the early 3d stage, has almost no strength and anti-scouring capability; (2) In the long term, the alkali-reducing method can reduce the pH value to below 9.0 in the 14d age, but the pH value of the base material can be increased along with continuous hydration of cement after 28d, and the base material is still in high alkalinity, so that the growth of plants is severely restricted.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction, and a preparation method and application thereof.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction is characterized in that the organic phosphonic acid, the sulfur powder and vulcanized bacterial agent are compounded according to the mass ratio of (0.5-4.5) to (0.02-0.3) to (0.001-0.006) to be used as alkali reduction materials of the vegetation concrete ecological modifier.
Further, the composition comprises the following components in parts by mass: 1-8 parts of biochar, 0.5-4.5 parts of organic phosphonic acid, 0.02-0.3 part of sulfur powder, 0.8-1.5 parts of organic fertilizer, 0.02-0.08 part of compound fertilizer, 0.02-0.12 part of slow release fertilizer, 0.01-0.05 part of water-retaining agent and 0.001-0.006 part of vulcanized bacterial agent.
Further, the biochar is one of wheat straw biochar, corn straw biochar, rice husk biochar and peanut husk biochar;
the organic phosphonic acid is one of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (phosphonobutane tricarboxylic acid) [ PBTC ], ethane-1-hydroxy-1, 1-diphosphonic acid (hydroxyethylidene diphosphonic acid) [ HEDP ], nitro tricarboxylic acid (methylenephosphonic acid) [ NTMP ], ethylenediamine tetra (methylenephosphonic acid) [ EDTMP ] and diethylenetriamine penta (methylenephosphonic acid) [ DTPMP ];
the sulfur powder is elemental sulfur, light yellow solid particles with the preferred particle size of 16-100 meshes;
the organic fertilizer is one of fermented chicken manure, fermented sheep manure and fermented cow manure;
the compound fertilizer is a nitrogen-phosphorus-potassium ternary compound fertilizer, and the total nutrient is 40% -60%;
the slow release fertilizer is MU slow release fertilizer.
The water-retaining agent is formed by mixing SPA water-absorbent resin and polyacrylamide according to the mass ratio of 1:1.5-2;
the effective viable count of the vulcanized bacterial agent is more than or equal to 200 hundred million/g, and the effective viable count is at least one of thiobacillus thiooxidans (thiobacillus thiooxidans), thiobacillus ferrooxidans (thiobacillus ferrooxidans) and thiobacillus denitrificans (thiobacillus denitrificans).
The invention also provides a preparation method of the vegetation concrete ecological modifier based on the organic phosphonic acid and sulfur powder composite alkali reduction, which comprises the following steps:
(1) Weighing raw materials according to a proportion, and uniformly mixing biochar, organic fertilizer and vulcanized bacterial agent to obtain a mixture;
(2) Mixing organic phosphonic acid, sulfur powder, compound fertilizer and slow release fertilizer, then adding the mixture and water-retaining agent, and fully and uniformly mixing to obtain the vegetation concrete ecological modifier.
The invention also provides vegetation concrete which comprises the following components in parts by mass: 100 parts of loam, 2-10 parts of vegetation concrete ecological modifier, 3-10 parts of organic matters and 2-14 parts of cement.
Further, the loam is field planting soil; the organic matter is one or more of sawdust, rice hulls, peanut shells, vinegar residues and vinasse; the cement is ordinary Portland cement, preferably P.O 42.5.5R cement.
The invention also provides a preparation method of the vegetation concrete, which comprises the following steps: mixing loam, organic matter, cement and the ecological modifier, adding slope protection plant seeds into the surface layer, adding water and stirring uniformly to obtain vegetation concrete.
The invention also provides an application method of the vegetation concrete-based ecological slope protection, which comprises the steps of spraying vegetation concrete on a slope to be repaired (the slope needs to be cleaned and hung with a net to be anchored), spraying a base layer, spraying a surface layer, covering a non-woven fabric on the surface layer, watering and maintaining, and uncovering the non-woven fabric after seeds germinate.
Further, the thickness of the base layer is 60-100mm, and the thickness of the surface layer is 20mm.
Compared with the prior art, the invention has the following advantages and technical effects:
1. the invention adopts organic phosphonic acid as main alkali-reducing material, and simultaneously, sulfur powder is mixed. The organic phosphonic acid is a multi-element organic acid, has strong acidity and low pH value, can quickly reduce the pH value of the base material to about 8.5 in early stage, and can ensure the normal germination of plant seeds. With the continuous progress of cement hydration in the matrix, the [ OH ] is continuously released] - H produced by dissociation of organic phosphonic acids + Gradually consumed, the pH of the substrate increases around 14 d. Sulfur is ground and mixed with soil to be oxidized into [ SO ] by soil microorganisms (sulfureted bacteria) 4 ] 2- ，[SO 4 ] 2- And the alkali ions such as calcium and magnesium in the soil are combined to form insoluble compounds such as calcium sulfate and magnesium sulfate. The compounds can play a role in neutralizing alkaline substances in soil, reducing the alkalinity of the soil and reducing the poisoning effect of sodium ions, thereby improving the soil texture of the saline-alkali soil. However, the method is a slow biological process, and usually needs several months to achieve the best effect, and the process can be better promoted by adding sulfureted bacteria into soil, and the alkalinity can be obviously reduced after two weeks of soil addition. The organic phosphonic acid and the sulfur powder cooperate to reduce the long-term pH of vegetation concrete to about 8 so as to be beneficial to normal growth of plants.
2. The organic phosphonic acid hardly delays setting time of cement in the system. The retarding mechanism of the cement is as follows: after the cement adsorbs the phosphonic acid, the surface charge is very low and the potential is insufficient to keep the cement particles away from each other. Phosphonic acids dissociate first in water and exist in various valence anionic forms. These ions are adsorbed onto the surface of cement particles in situ with Ca 2+ The ions combine to form insoluble calcium phosphate and form film to cover the surface of cement particle to form coating layer, so that the hydration reaction of cement particle is delayed and even prevented. Or adsorbed on the crystal nucleus of the hydrated cement, and delays the growth of the crystal nucleus, thereby delaying the initial hydration reaction of the cement. Phosphonic acid has strong adsorption effect on almost all mineral surfaces, and also comprises clay, and in a cement soil body system, the amounts of cement and phosphonic acid are relatively small, and a large amount of clay particles exist around the phosphonic acid, so that the phosphonic acid is adsorbed on the clay particles at a larger probability, and the influence on the setting time of the cement after the phosphonic acid is doped in the system is almost negligible, so that the early strength of the system is ensured to be higher.
3. The organic phosphonic acid itself contains a large amount of phosphorus, and is also an excellent chelating agent, so that stable metal complexes can be formed under wide pH conditions, trace elements and phosphorus contained in the metal complexes are necessary for normal development of plants, and the organic phosphonic acid has positive effects on seed germination, root growth and yield increase of plants.
4. The biochar is a carbon-rich product formed by pyrolysis of biomass such as agricultural and forestry waste under the anoxic condition, has the characteristics of larger specific surface area, microporous structure, stronger adsorptivity, biodegradability resistance and the like, and can repair and improve various barrier soil, in particular saline-alkali soil caused by cement introduction. Because some nutrients are concentrated and enriched in the anaerobic thermal cracking process, ca, mg, P, K and other elements in the biochar are higher than the content of the prepared materials, and the biochar has higher calcium and magnesium content by selecting a calcium-containing catalyst in pyrolysis. The calcium and magnesium ions, especially calcium ions, play an important positive role in preventing soil alkalization, reducing sodium alkali hazard and improving physical and chemical properties of soil. In addition, the biochar also has the functions of improving soil aggregate structure and preserving water and fertilizer.
Detailed Description
Various exemplary embodiments of the invention will now be described in detail, which should not be considered as limiting the invention, but rather as more detailed descriptions of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in this disclosure, it is understood that each intermediate value between the upper and lower limits of the ranges is also specifically disclosed. Every smaller range between any stated value or stated range, and any other stated value or intermediate value within the stated range, is also encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the invention described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from consideration of the specification of the present invention. The specification and examples are exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
The invention provides a vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction, which is prepared by compounding the organic phosphonic acid, the sulfur powder and a vulcanized bacterial agent according to the mass ratio of (0.5-4.5) to (0.02-0.3) to (0.001-0.006) as an alkali reduction material of the vegetation concrete ecological modifier, wherein the preferable ratio is (1.5-2.5) to (0.04-0.06) to (0.003-0.005).
The vegetation concrete ecological modifier based on the organic phosphonic acid and sulfur powder composite alkali reduction comprises the following components in parts by mass: 1-8 parts of biochar, 0.5-4.5 parts of organic phosphonic acid, 0.02-0.3 part of sulfur powder, 0.8-1.5 parts of organic fertilizer, 0.02-0.08 part of compound fertilizer, 0.02-0.12 part of slow release fertilizer, 0.01-0.05 part of water-retaining agent and 0.001-0.006 part of vulcanized bacterial agent.
The composition preferably comprises the following components in parts by mass: 2-3 parts of biochar, 1.5-2.5 parts of organic phosphonic acid, 0.04-0.06 part of sulfur powder, 1.2-1.5 parts of organic fertilizer, 0.04-0.06 part of compound fertilizer, 0.06-0.08 part of slow release fertilizer, 0.03-0.04 part of water-retaining agent and 0.03-0.005 part of vulcanized bacterial agent.
In some preferred embodiments of the present invention, the biochar is one of wheat straw biochar, corn straw biochar, rice husk biochar, and peanut husk biochar.
The organic phosphonic acid is one of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (phosphonobutane tricarboxylic acid) [ PBTC ], ethane-1-hydroxy-1, 1-diphosphonic acid (hydroxyethylidene diphosphonic acid) [ HEDP ], nitro tricarboxylic acid (methylenephosphonic acid) [ NTMP ], ethylenediamine tetra (methylenephosphonic acid) [ EDTMP ] and diethylenetriamine penta (methylenephosphonic acid) [ DTPMP ];
the sulfur powder is elemental sulfur, light yellow solid particles with the preferred particle size of 16-100 meshes;
the organic fertilizer is one of fermented chicken manure, fermented sheep manure and fermented cow manure;
the compound fertilizer is a nitrogen-phosphorus-potassium ternary compound fertilizer, and the total nutrient is 40-60%;
the slow release fertilizer is MU slow release fertilizer;
the water-retaining agent is formed by mixing SPA water-absorbent resin and polyacrylamide according to the mass ratio of 1:1.5-2;
the effective viable count of the vulcanized bacterial agent is more than or equal to 200 hundred million/g, and the effective viable count is at least one of thiobacillus thiooxidans (thiobacillus thiooxidans), thiobacillus ferrooxidans (thiobacillus ferrooxidans) and thiobacillus denitrificans (thiobacillus denitrificans).
The invention also provides a preparation method of the plant material modifier based on the organic phosphonic acid and sulfur powder composite alkali reduction, which comprises the following steps:
(1) Weighing raw materials according to a proportion, and uniformly mixing biochar, organic fertilizer and vulcanized bacterial agent to obtain a mixture;
(2) Mixing organic phosphonic acid, sulfur powder, compound fertilizer and slow release fertilizer, and then adding the mixture and a water-retaining agent to obtain a vegetation concrete ecological modifier;
the invention also provides vegetation concrete which comprises the following components in parts by mass: 100 parts of loam, 2-10 parts of vegetation concrete ecological modifier, 3-10 parts of organic matters and 2-14 parts of cement.
In some preferred embodiments of the invention, the loam is a field planting soil; the organic matter is one or more of sawdust, rice hulls, peanut shells, vinegar residues and vinasse; the cement is ordinary Portland cement, preferably P.O 42.5.5R cement.
The invention also provides a preparation method of the vegetation concrete, which comprises the following steps: mixing loam, organic matter, cement and the vegetation concrete ecological modifier, adding slope protection plant seeds into the surface layer, and adding water and stirring uniformly to obtain vegetation concrete.
In some preferred embodiments of the invention, the loam is a field planting soil whose soil fertility meets planting soil requirements; the organic matter is one or more of sawdust, rice hulls, peanut shells, vinegar residues and vinasse; the cement is ordinary Portland cement, preferably P.O 42.5.5R cement;
the invention also provides an application method of the vegetation concrete ecological slope protection based on the composite alkali reduction of the organic phosphonic acid and the sulfur powder, the prepared vegetation concrete is constructed by adopting spray seeding, the thickness of a base layer is 60-100mm, the vegetation concrete is sprayed twice, and the middle interval is within 4 hours; after the spraying of the base layer is completed, the surface layer is sprayed, and the thickness of the surface layer is generally 20mm. Covering the non-woven fabric, watering and maintaining until the seeds germinate, and removing the non-woven fabric. Adding festuca arundinacea seeds into the surface layer with the doping amount of 20-30g/m 2 。
The above-mentioned effects can be achieved by adopting the specific composition components of the raw materials according to the present invention, and in order to further verify the effects through experiments, as an example, the following raw materials are typically selected, but not limited to:
the loam is field planting soil, and the soil fertility meets the planting soil requirement;
the organic matter is formed by mixing sawdust and rice hulls according to the mass ratio of 2:1;
the cement is P.O 42.5.5R cement;
the biochar is corn stalk biochar;
the organic phosphonic acid is ethane-1-hydroxy-1, 1-diphosphonic acid (hydroxyethylidene diphosphonic acid) [ HEDP ];
the sulfur powder is sulfur simple substance, light yellow solid particles with the particle size of 16-100 meshes;
the organic fertilizer is fermented sheep manure;
the compound fertilizer is a nitrogen-phosphorus-potassium ternary compound fertilizer, and the available nutrients are 45 percent (15 percent of each of nitrogen, phosphorus and potassium);
the slow release fertilizer is MU slow release fertilizer;
the water-retaining agent is formed by mixing SPA water-absorbent resin and polyacrylamide according to the mass ratio of 1:2.
The effective viable count of the vulcanized bacterial agent is more than or equal to 200 hundred million/g, and the effective viable count is formed by mixing thiobacillus thiooxidans and thiobacillus thiooxidans according to the mass ratio of 1:1.
The "parts" in the present invention are all parts by mass unless otherwise specified.
The raw materials used in the following examples of the present invention are all commercially available.
The following examples serve as further illustrations of the technical solutions of the invention.
Examples 1 to 3, comparative examples 1 to 4
Preparation of vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction:
(1) Weighing raw materials according to the raw material dosage ratio in table 1, and uniformly mixing biochar, organic fertilizer and vulcanized bacterial agent to obtain a mixture;
(2) Mixing organic phosphonic acid, sulfur powder, compound fertilizer and slow release fertilizer, and then adding the mixture and water-retaining agent to obtain the vegetation concrete ecological modifier.
TABLE 1
Application examples 1 to 3, comparative application examples 1 to 4
Preparation and application of vegetation concrete:
(1) Weighing the raw materials according to the proportion of the table 2;
(2) When the base layer is prepared, sequentially adding planting loam, organic matters, cement and plant material modifier, and adding a proper amount of water to fully and uniformly stir;
(2) When the surface layer is prepared, sequentially adding the planting loam, the organic matter, the cement and the plant growth material modifier, and finally adding the festuca arundinacea seeds with the doping amount of 25g/m 2 And adding a proper amount of water and fully and uniformly stirring.
(3) The prepared vegetation concrete is subjected to spray seeding construction, the thickness of a base layer is 80mm, the vegetation concrete is sprayed and sowed twice, and the interval is 2h; after the spraying of the base layer is completed, spraying a surface layer, wherein the thickness of the surface layer is 20mm;
(4) Covering the non-woven fabric, watering and maintaining until the grass seeds germinate, and removing the non-woven fabric.
TABLE 2
After the spraying and sowing for 3-7 days, the grass seeds are germinated successively. The key technical indicators are tested, and the results are shown in the following tables 3 and 4.
Table 3 pH value test results
TABLE 4 other index test results
From the table, the organic phosphonic acid, the sulfur powder and the vulcanized bacterial agent compound alkali reduction in each application example does not negatively influence the early strength of the system, has good physical and chemical properties, and has good growth vigor of festuca arundinacea. As can be seen from the comparison of application example 3 with application examples 1 and 2, along with the increase of the organic phosphonic acid doping amount in the ecological modifier, the growth of the festuca arundinacea root system can be rapidly promoted, and the nutrient and moisture absorption is facilitated. As is clear from comparative application examples 1-4, the organic phosphonic acid, the sulfur powder and the vulcanized bacterial agent play an important role in reducing the alkalinity of vegetation concrete, HEDP can quickly reduce the early alkalinity, but as cement hydration is continuously carried out, HEDP is gradually consumed, and the alkalinity is increased; under natural conditions, the alkali-reducing effect of the sulfur powder is slow, the alkali-reducing effect can be generated only about one or two months, and the addition of the vulcanized bacteria can promote the sulfur powder to be oxidized into sulfuric acid rapidly, so that the alkali-reducing effect is accelerated.
The foregoing is merely a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction is characterized in that the organic phosphonic acid, the sulfur powder and vulcanized bacterial agent are compounded according to the mass ratio of (0.5-4.5) to (0.02-0.3) to (0.001-0.006) to be used as alkali reduction materials of the vegetation concrete ecological modifier.
2. The vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction as claimed in claim 1, which is characterized by comprising the following components in parts by mass: 1-8 parts of biochar, 0.5-4.5 parts of organic phosphonic acid, 0.02-0.3 part of sulfur powder, 0.8-1.5 parts of organic fertilizer, 0.02-0.08 part of compound fertilizer, 0.02-0.12 part of slow release fertilizer, 0.01-0.05 part of water-retaining agent and 0.001-0.006 part of vulcanized bacterial agent.
3. The vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction according to claim 2, wherein,
the biochar is one of wheat straw biochar, corn straw biochar, rice hull biochar and peanut hull biochar;
the organic phosphonic acid is one of 2-phosphonobutane-1, 2, 4-tricarboxylic acid (phosphonobutane tricarboxylic acid), ethane-1-hydroxy-1, 1-diphosphonic acid (hydroxyethylidene diphosphonic acid), nitro tricarboxylic acid (methylenephosphonic acid), ethylenediamine tetra (methylenephosphonic acid) and diethylenetriamine penta (methylenephosphonic acid);
the sulfur powder is elemental sulfur, and the particle size is 16-100 meshes;
the organic fertilizer is one of fermented chicken manure, fermented sheep manure and fermented cow manure;
the compound fertilizer is a nitrogen-phosphorus-potassium ternary compound fertilizer, and the available nutrients are 40-60%;
the slow release fertilizer is MU slow release fertilizer.
4. The vegetation concrete ecological modifier based on organic phosphonic acid and sulfur powder composite alkali reduction according to claim 2, wherein,
the water-retaining agent is formed by mixing SPA water-absorbent resin and polyacrylamide according to the mass ratio of 1:1.5-2;
the effective viable count of the vulcanized bacterial agent is more than or equal to 200 hundred million/g, and the effective viable count is at least one of thiobacillus thiooxidans, ferrous thiobacillus thiooxidans and thiobacillus denitrificans.
5. A method for preparing the vegetation concrete ecological modifier based on the composite alkali reduction of organic phosphonic acid and sulfur powder as claimed in any one of claims 1 to 4, which comprises the following steps:
weighing biochar, organic fertilizer and vulcanized bacterial agent according to a proportion, and uniformly mixing to obtain a mixture;
mixing organic phosphonic acid, sulfur powder, compound fertilizer and slow release fertilizer, then adding the mixture and water-retaining agent, and fully and uniformly mixing to obtain the vegetation concrete ecological modifier.
6. The vegetation concrete is characterized by comprising the following components in parts by mass: 100 parts of loam, 2-10 parts of the vegetation concrete ecological modifier of any one of claims 1-4, 3-10 parts of organic matters and 2-14 parts of cement.
7. The vegetation concrete of claim 6 wherein the loam is a field planting soil; the organic matter is one or more of sawdust, rice hulls, peanut shells, vinegar residues and vinasse; the cement is ordinary silicate cement.
8. A method of preparing vegetation concrete as claimed in any of claims 6 to 7 comprising the steps of: mixing loam, organic matter, cement and the vegetation concrete ecological modifier, adding slope protection plant seeds into the surface layer, and adding water and stirring uniformly to obtain vegetation concrete.
9. An application method of the vegetation concrete ecological slope protection according to any one of claims 6 to 7, wherein the vegetation concrete is sprayed on a slope to be repaired, a base layer is sprayed firstly, then a surface layer is sprayed, a non-woven fabric is covered on the surface layer, watering maintenance is carried out, and the non-woven fabric is removed after seeds germinate.
10. The method of claim 9, wherein the base layer has a thickness of 60-100mm and the cover layer has a thickness of 20mm.
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