CN109987916B - Degradable phosphate cement-based aggregate with fertilizer efficiency slow-release performance and preparation method thereof - Google Patents
Degradable phosphate cement-based aggregate with fertilizer efficiency slow-release performance and preparation method thereof Download PDFInfo
- Publication number
- CN109987916B CN109987916B CN201910281770.0A CN201910281770A CN109987916B CN 109987916 B CN109987916 B CN 109987916B CN 201910281770 A CN201910281770 A CN 201910281770A CN 109987916 B CN109987916 B CN 109987916B
- Authority
- CN
- China
- Prior art keywords
- parts
- water
- citric acid
- aggregate
- slow release
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- C04B28/34—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 cold phosphate binders
- C04B28/344—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 cold phosphate binders the phosphate binder being present in the starting composition solely as one or more phosphates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00758—Uses not provided for elsewhere in C04B2111/00 for agri-, sylvi- or piscicultural or cattle-breeding applications
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Fertilizers (AREA)
Abstract
The invention belongs to the field of vegetation ecological concrete, and particularly relates to degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance and a preparation method thereof. The composition comprises the following components in parts by weight: 2-5 parts of molasses, 6-15 parts of soluble starch, 5-85 parts of citric acid powder, 40-55 parts of magnesium chloride, 15-25 parts of ammonium dihydrogen phosphate, 5-12 parts of glucose, 2-8 parts of sodium fatty acid, 5-10 parts of water-absorbing resin, 5-15 parts of portland cement and 37-73 parts of water. The invention takes magnesium ammonium phosphate hexahydrate as a main component, and the pH value of the aggregate is regulated and controlled by citric acid to change the pH value of aqueous solution in pores of the aggregate, so that the aggregate with good fertilizer effect slow release and degradability is obtained.
Description
Technical Field
The invention belongs to the field of vegetation ecological concrete, and particularly relates to degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance and a preparation method thereof.
Background
This information disclosed in this background of the invention is only for the purpose of increasing an understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
In development behaviors such as water conservancy, traffic, energy, city expansion and the like, natural landforms and original vegetation cover layers are damaged, so that water and soil loss, local microclimate are changed, and a biological chain is cut off. In the face of seriously deteriorated ecological environment situation, the plant-growing ecological concrete is gradually applied, and certain engineering benefit, ecological benefit and social benefit are obtained.
The plant-growing ecological concrete is concrete with biocompatibility and ecological effect, wherein the ecological effect can be expressed that organisms can grow and influence the organisms in a concrete finished product, and the organisms attached to the concrete have a dependence relationship with the concrete. However, after the concrete is in service for a period of time, the plant roots and the silt washed by the rainwater enter the concrete to reduce the porosity, thereby causing the concrete to crack. Meanwhile, the fertilizer applied to the planted plants is gradually thinned under the action of rain wash and plant absorption, so that the plant requirements cannot be met; therefore, further research on the vegetation ecological concrete with the fertilizer efficiency slow release performance is needed.
Disclosure of Invention
Aiming at the existing problems, the invention provides a degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance and a preparation method thereof. The invention takes magnesium ammonium phosphate hexahydrate as a main component, and the pH value of the aggregate is regulated and controlled by citric acid to change the pH value of aqueous solution in pores of the aggregate, so that the aggregate with good fertilizer effect slow release and degradability is obtained.
In order to realize the purpose, the invention discloses the following technical scheme:
the first object of the present invention: provided is a composition for preparing a degradable phosphate cement-based aggregate having a fertilizer efficiency slow-release property, the composition comprising, in parts by weight: 2-5 parts of molasses, 6-15 parts of soluble starch, 5-85 parts of citric acid powder, 40-55 parts of magnesium chloride, 15-25 parts of ammonium dihydrogen phosphate, 5-12 parts of glucose, 2-8 parts of sodium fatty acid, 5-10 parts of water-absorbing resin and 5-15 parts of portland cement; the components of the composition are stored separately.
Further, the composition for preparing a degradable phosphate cement-based aggregate having fertilizer efficiency slow-release properties further comprises: 37-73 parts of water; and the water and the components of the composition are stored separately.
Preferably, the composition comprises, in parts by weight: 2-3 parts of molasses, 6-10 parts of soluble starch, 5-82 parts of citric acid powder, 40-45 parts of magnesium chloride, 15-20 parts of ammonium dihydrogen phosphate, 5-10 parts of glucose, 2-6 parts of sodium fatty acid, 5-8 parts of water-absorbing resin and 5-10 parts of portland cement; the components of the composition are stored separately. The test shows that: when the contents of the respective components are within the above ranges, the aggregate obtained has a more significant cumulative total nitrogen release rate and a more significant cumulative total phosphorus release rate.
Preferably, the composition comprises, in parts by weight: the composition comprises: 3-5 parts of molasses, 10-15 parts of soluble starch, 82-85 parts of citric acid powder, 45-55 parts of magnesium chloride, 20-25 parts of ammonium dihydrogen phosphate, 10-12 parts of glucose, 6-8 parts of sodium fatty acid, 8-10 parts of water-absorbing resin and 10-15 parts of portland cement; the components of the composition are stored separately. The test shows that: when the content of each component is within the above range, the obtained aggregate has more excellent performance indexes such as absorption rate, degradation rate and the like.
The second purpose of the invention is to provide a preparation method of degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance, which comprises the following steps:
uniformly mixing molasses, soluble starch and water according to a proportion, adding citric acid powder, stirring, drying and grinding the obtained mixture to obtain coated citric acid;
according to the proportion, magnesium chloride, ammonium dihydrogen phosphate, water, glucose and sodium aliphatate are mixed and then slowly and uniformly stirred in a closed environment with set temperature, then ammonia gas is introduced to adjust the pH value to be alkaline, the mixture is rapidly stirred until precipitates appear, the mixture is filtered, the obtained precipitates are dried and then ground, and ammonium magnesium phosphate hexahydrate powder is obtained;
according to the proportion, water-absorbing resin and water are mixed and then uniformly stirred, then the ammonium magnesium phosphate hexahydrate powder, the coated citric acid and the silicate cement are added, after uniform stirring, the obtained slurry is formed into round granules, and the round granules are maintained, so that the degradable phosphate cement-based aggregate with the fertilizer efficiency slow-release performance is obtained.
Further, in the step of preparing the coated citric acid, the adding amount of the water is 5-10 parts of water, and the citric acid powder is added in a plurality of times, and optionally, the citric acid powder is added in 2-6 times.
Preferably, in the step of preparing magnesium ammonium phosphate hexahydrate, the pH value is adjusted to be between 8.8 and 10.2 by ammonia gas. When the pH is adjusted to the above range, the solubility of magnesium ammonium phosphate hexahydrate is reduced, and the solution rapidly reaches supersaturation, thereby causing flocculation and sedimentation.
Further, in the step of preparing magnesium ammonium phosphate hexahydrate, the addition amount of water is 17-38 parts of water.
Further, in the step of mixing the water absorbent resin and water, the amount of water added is 15 to 25 parts by weight.
Further, in the step of preparing the coated citric acid, drying conditions are as follows: drying at 60-80 deg.C for 10-30 min; the stirring time is 15-60 minutes; the grinding time is 10-30 minutes.
Further, in the step of preparing magnesium ammonium phosphate hexahydrate, the temperature in a closed container is 3-15 ℃; the grinding time is 10-20 minutes.
Further, in the step of preparing the aluminum powder and mixing the aluminum powder with water, the stirring time is 5-10 minutes; the diameter of the round grains is 0.4-1.2 cm; the curing conditions are as follows: curing at 40-60 deg.C and 60-90% relative humidity for 10-30 min.
In the present invention, the role of the molasses mainly includes: (1) the thickening effect can regulate and control the addition amount of mixing water in the coating material, thereby controlling the porosity and the dissolution rate of the coating material and further controlling the release rate of tartaric acid. (2) The side chain of the molasses contains a large amount of hydroxyl, and the molasses can adsorb dissolved magnesium ammonium phosphate hexahydrate, so that premature fertilizer efficiency release of the magnesium ammonium phosphate hexahydrate is prevented, fertilizer waste is avoided, and aggregate slow release performance is ineffective. The magnesium chloride and the ammonium dihydrogen phosphate have the main function of generating the magnesium ammonium phosphate hexahydrate under the condition provided by the invention. The glucose is polyhydroxy aldehyde, a large amount of hydroxyl groups of the glucose can adsorb magnesium ammonium phosphate hexahydrate precipitates, the precipitation rate of the glucose is regulated, and the phenomenon that crystals are too thick due to too fast crystallization and the release rate of fertilizer efficiency is influenced is prevented.
The third purpose of the invention is to provide the composition for preparing the degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance, the prepared aggregate and the application of the preparation method of the aggregate in the preparation of the vegetation ecological concrete. The degradable phosphate cement-based aggregate with the fertilizer effect slow release performance has excellent fertilizer effect slow release and degradability, and is very suitable for preparing the vegetation ecological concrete.
Compared with the prior art, the invention has the following beneficial effects:
(1) the aggregate provided by the invention takes magnesium ammonium phosphate hexahydrate as a main component, the release rate of citric acid is regulated and controlled through the coating thickness of the citric acid and the porosity of the aggregate, and the pH value of aqueous solution in pores of the aggregate is further changed, so that the fertilizer efficiency slow release and the degradability of the aggregate are realized.
(2) According to the invention, the citric acid is coated by soluble starch, pores are formed in the aggregate by the change of the water absorption and water loss volume of the water absorption resin, and the release rate of the citric acid is regulated and controlled by the coating thickness of the citric acid and the porosity of the aggregate.
(3) The method adopts a closed container at 3-15 ℃ for stirring, can effectively inhibit the quick crystallization of magnesium ammonium phosphate hexahydrate, and ensures the flocculation, loose structure and high activity; the introduction of ammonia gas not only can make the alkalinity in the container reach more than 8.8, but also can increase the ammonia gas concentration, and is beneficial to the formation of magnesium ammonium phosphate hexahydrate.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described above, after a period of service of ordinary concrete, the plant roots and rain-washed silt enter the interior of the concrete to reduce the porosity, thereby causing the concrete to crack. Meanwhile, the fertilizer applied to the planted plants is gradually thinned under the action of rain wash and plant absorption, and the plant requirements cannot be met. Therefore, the invention provides a degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance and a preparation method thereof; the invention will now be further described with reference to specific embodiments.
In the following examples, the portland cement was purchased from innovated cement of the jen century, inc, and had a strength rating of 42.5.
Example 1
A preparation method of degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance comprises the following steps:
(1) uniformly mixing 2 parts of molasses, 6 parts of soluble starch and 5 parts of water, adding 75 parts of citric acid powder (added by 2 times), stirring for 15 minutes, drying for 10 minutes at 60 ℃, and grinding for 10 minutes to obtain coated citric acid;
(2) slowly stirring 40 parts of magnesium chloride, 15 parts of ammonium dihydrogen phosphate, 17 parts of water, 5 parts of glucose and 2 parts of sodium aliphatate in a closed container at 15 ℃ for 10 minutes, introducing ammonia gas until the pH value is adjusted to 8.8, rapidly stirring until flocculent magnesium ammonium phosphate hexahydrate precipitate appears, filtering, drying and grinding for 10 minutes to obtain magnesium ammonium phosphate hexahydrate powder;
(3) stirring 5 parts of water-absorbent resin and 15 parts of water for 5 minutes, adding 50 parts of magnesium ammonium phosphate hexahydrate powder, 5 parts of coated citric acid and 5 parts of portland cement, stirring, forming into round granules with the diameter of 0.4cm, and curing for 10 minutes at 40 ℃ and the relative humidity of 60% to obtain the aggregate.
Example 2
A preparation method of degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance comprises the following steps:
(1) uniformly mixing 5 parts of molasses, 15 parts of soluble starch and 10 parts of water, adding 85 parts of citric acid powder (added by 6 times), stirring for 60 minutes, drying for 30 minutes at 80 ℃, and grinding for 30 minutes to obtain coated citric acid;
(2) slowly stirring 55 parts of magnesium chloride, 25 parts of ammonium dihydrogen phosphate, 38 parts of water, 12 parts of glucose and 8 parts of sodium aliphatate in a closed container at the temperature of 3 ℃ for 20 minutes, introducing ammonia gas until the pH value is adjusted to 10.2, quickly stirring until flocculent magnesium ammonium phosphate hexahydrate precipitate appears, filtering, drying and grinding for 30 minutes to obtain magnesium ammonium phosphate hexahydrate powder;
(3) stirring 10 parts of water-absorbent resin and 25 parts of water for 10 minutes, adding 75 parts of magnesium ammonium phosphate hexahydrate powder, 10 parts of coated citric acid and 15 parts of portland cement, stirring, forming into round granules with the diameter of 1.2cm, and curing for 30 minutes under the conditions of 60 ℃ and relative humidity of 90% to obtain the aggregate.
Example 3
A preparation method of degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance comprises the following steps:
(1) uniformly mixing 3 parts of molasses, 10 parts of soluble starch and 8 parts of water, adding 82 parts of citric acid powder (added by 5 times), stirring for 30 minutes, drying for 15 minutes at 75 ℃, and grinding for 20 minutes to obtain coated citric acid;
(2) slowly stirring 45 parts of magnesium chloride, 20 parts of ammonium dihydrogen phosphate, 30 parts of water, 10 parts of glucose and 6 parts of sodium aliphatate in a closed container at 12 ℃ for 15 minutes, introducing ammonia gas until the pH value is adjusted to 10, rapidly stirring until flocculent magnesium ammonium phosphate hexahydrate precipitate appears, filtering, drying and grinding for 20 minutes to obtain magnesium ammonium phosphate hexahydrate powder;
(3) stirring 8 parts of water-absorbent resin and 20 parts of water for 8 minutes, adding 60 parts of magnesium ammonium phosphate hexahydrate powder, 8 parts of coated citric acid and 10 parts of portland cement, stirring, forming into round granules with the diameter of 0.9cm, and curing for 15 minutes at the temperature of 45 ℃ and the relative humidity of 85% to obtain the aggregate.
Experimental example 1
The preparation method of the degradable aggregate with the fertilizer efficiency slow release performance is the same as the preparation method of the degradable aggregate in the example 1, and the differences are that: in the step (1), soluble starch is not added to verify the influence of the soluble starch coated citric acid on the slow release of the fertilizer efficiency of the aggregate.
Experimental example 2
The preparation method of the degradable aggregate with the fertilizer efficiency slow release performance is the same as the preparation method of the degradable aggregate in the example 1, and the differences are that: in the step (2), stirring is carried out in a closed container at 40 ℃ and in an ammonia atmosphere instead of stirring at room temperature, so as to verify the influence of the prepared magnesium ammonium phosphate hexahydrate precipitate on the slow release of the fertilizer efficiency and the degradability of the aggregate.
Experimental example 3
The preparation method of the degradable aggregate with the fertilizer efficiency slow release performance is the same as the preparation method of the degradable aggregate in the example 1, and the differences are that: and (4) no resin is added in the step (3) to verify the influence of the resin on the slow release of the fertilizer efficiency and the degradability of the aggregate. And (3) performance testing:
the aggregates prepared in examples 1 to 3 and test examples 1 to 3 were examined for their crushing index and water absorption rate in accordance with GB/T14685-2011 "construction pebbles and crushed stones".
The total nitrogen and total phosphorus contents in the constant-temperature aqueous solution at 25 ℃ of examples 1 to 3 and test examples 1 to 3 after being soaked for 28 days are measured by referring to GBT11894-89 ultraviolet spectrophotometry for determining total nitrogen in water quality for alkaline potassium persulfate digestion and GB 100893-89 ammonium spectrophotometry for determining total phosphorus in water quality. The aggregate is soaked in constant-temperature water at 25 ℃ for 60 days to measure the degradation rate. The results are shown in Table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Experimental example 1 | Experimental example 2 | Experimental example 3 | |
| Crush index/%) | 15.1 | 14.9 | 13.6 | 15.2 | 17.1 | 15.3 |
| Water absorption/%) | 22.7 | 25.1 | 23.1 | 22.2 | 13.6 | 9.2 |
| Percent of degradation/%) | 34.7 | 40.7 | 38.5 | 75.8 | 20.4 | 16.6 |
| Cumulative total nitrogen release rate/%) | 27.7 | 26.3 | 28.6 | 56.9 | 9.7 | 12.4 |
| Total phosphorus cumulative release rate/%) | 39.1 | 34.4 | 39.7 | 72.3 | 13.4 | 15.8 |
As can be seen from the test results in table 1, compared to example 1, in experimental example 1, because no starch forms a coating on the surface layer of citric acid to control the release rate, the pH value of the solution is reduced by the rapidly released citric acid and the magnesium ammonium phosphate hexahydrate is rapidly dissolved, the degradation rate of the aggregate, the total nitrogen and the total phosphorus cumulative release rate are rapidly increased, and the purpose of slow release cannot be achieved. The magnesium ammonium phosphate hexahydrate obtained in the experimental example 2 is non-flocculent, mostly crystalline, and has poor activity, and the degradation rate and the accumulated release rate index of the aggregate obtained in the experimental example 3 are both greatly reduced because no resin provides water and the porosity is regulated. According to the invention, the release rate of citric acid is regulated and controlled through the coating thickness of citric acid and the porosity of aggregate, so that the pH value of a water solution in the pores of the aggregate is changed, and thus the fertilizer efficiency slow release and the degradability of the aggregate are realized. Meanwhile, pores are formed in the aggregate according to the change of the water absorption and water loss volume of the water-absorbent resin, and the release rate of the citric acid is regulated and controlled through the coating thickness of the citric acid and the porosity of the aggregate, so that the aggregate with good fertilizer effect slow release and degradability is obtained.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. The degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance is characterized by comprising the following components in parts by weight: 2-5 parts of molasses, 6-15 parts of soluble starch, 5-85 parts of citric acid powder, 40-55 parts of magnesium chloride, 15-25 parts of ammonium dihydrogen phosphate, 5-12 parts of glucose, 2-8 parts of sodium fatty acid, 5-10 parts of water-absorbing resin and 5-15 parts of portland cement;
the preparation method of the aggregate comprises the following steps:
uniformly mixing molasses, soluble starch and water according to a proportion, adding citric acid powder, stirring, drying and grinding the obtained mixture to obtain coated citric acid;
according to the proportion, magnesium chloride, ammonium dihydrogen phosphate, water, glucose and sodium aliphatate are mixed and then slowly and uniformly stirred in a closed environment with set temperature, then ammonia gas is introduced to adjust the pH value to be alkaline, the mixture is rapidly stirred until precipitates appear, the mixture is filtered, the obtained precipitates are dried and then ground, and ammonium magnesium phosphate hexahydrate powder is obtained;
according to the proportion, mixing water-absorbing resin and water, uniformly stirring, then adding the ammonium magnesium phosphate hexahydrate powder, the coated citric acid and the portland cement, uniformly stirring, forming the obtained slurry into round granules, and maintaining to obtain the degradable phosphate cement-based aggregate with the fertilizer efficiency slow-release performance;
the preparation method of magnesium ammonium phosphate hexahydrate comprises the following steps: adjusting the pH value to 8.8-10.2 by ammonia gas;
in the step of preparing the magnesium ammonium phosphate hexahydrate, the temperature in a closed container is 3-15 ℃.
2. The degradable phosphate cement-based aggregate with fertilizer effect slow release performance of claim 1, wherein the composition comprises the following components in parts by weight: 2-3 parts of molasses, 6-10 parts of soluble starch, 5-82 parts of citric acid powder, 40-45 parts of magnesium chloride, 15-20 parts of ammonium dihydrogen phosphate, 5-10 parts of glucose, 2-6 parts of sodium fatty acid, 5-8 parts of water-absorbing resin and 5-10 parts of portland cement.
3. The degradable phosphate cement-based aggregate with fertilizer effect slow release performance of claim 1, wherein the composition comprises the following components in parts by weight: 3-5 parts of molasses, 10-15 parts of soluble starch, 82-85 parts of citric acid powder, 45-55 parts of magnesium chloride, 20-25 parts of ammonium dihydrogen phosphate, 10-12 parts of glucose, 6-8 parts of sodium fatty acid, 8-10 parts of water-absorbing resin and 10-15 parts of portland cement.
4. The degradable phosphate cement-based aggregate with fertilizer effect slow release performance of claim 1, wherein in the step of preparing the coated citric acid, the water is added in an amount of 5-10 parts of water;
or in the step of preparing magnesium ammonium phosphate hexahydrate, the addition amount of water is 17-38 parts of water;
or in the step of mixing the water-absorbent resin and water, the amount of water added is 15-25 parts of water.
5. The degradable phosphate cement-based aggregate with fertilizer effect slow release property according to claim 1, wherein the citric acid powder is added in divided portions.
6. The degradable phosphate cement-based aggregate with fertilizer effect slow release performance of claim 5, wherein the citric acid powder is added in 2 to 6 times.
7. The degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance of any one of claims 1 to 6, wherein in the step of preparing the coated citric acid, the drying conditions are as follows: drying at 60-80 deg.C for 10-30 min.
8. The degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance according to any one of claims 1 to 6, wherein in the step of preparing the coated citric acid, the stirring time is 15 to 60 minutes.
9. The degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance according to any one of claims 1 to 6, wherein in the step of preparing the coated citric acid, the grinding time is 10 to 30 minutes.
10. The degradable phosphate cement-based aggregate with fertilizer effect slow release performance according to claim 8, wherein in the step of preparing the magnesium ammonium phosphate hexahydrate, the grinding time is 10-20 minutes.
11. The degradable phosphate cement-based aggregate with fertilizer effect slow release performance according to claim 1, wherein the curing conditions are as follows: curing at 40-60 deg.C and 60-90% relative humidity for 10-30 min.
12. Use of the degradable phosphate cement-based aggregate with fertilizer efficiency slow release performance according to any one of claims 1-11 in the preparation of vegetation ecological concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910281770.0A CN109987916B (en) | 2019-04-09 | 2019-04-09 | Degradable phosphate cement-based aggregate with fertilizer efficiency slow-release performance and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910281770.0A CN109987916B (en) | 2019-04-09 | 2019-04-09 | Degradable phosphate cement-based aggregate with fertilizer efficiency slow-release performance and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109987916A CN109987916A (en) | 2019-07-09 |
| CN109987916B true CN109987916B (en) | 2021-09-21 |
Family
ID=67132712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910281770.0A Active CN109987916B (en) | 2019-04-09 | 2019-04-09 | Degradable phosphate cement-based aggregate with fertilizer efficiency slow-release performance and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109987916B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000169275A (en) * | 1998-12-10 | 2000-06-20 | Keikinzoku Kyokai | Sustained release material of fertilizer component and utilization after use of the same sustained release material |
| CN103964952A (en) * | 2014-04-29 | 2014-08-06 | 济南大学 | Fertilizer efficiency sustained release type steel slag aggregate used for plant-growing concrete and preparation method of steel slag aggregate |
| CN104140338A (en) * | 2014-08-20 | 2014-11-12 | 济南大学 | Sustained-release fertilizer suitable for planting concrete and preparation method of sustained-release fertilizer |
| CN106396575B (en) * | 2016-09-08 | 2018-12-04 | 济南大学 | A kind of nitrogen fertilizer slow-releasing type plants raw rubber gel material and preparation method thereof |
| CN107337543B (en) * | 2017-08-21 | 2020-11-24 | 济南大学 | Saline-alkali soil slow-release fertilizer and preparation method thereof |
| CN107382510B (en) * | 2017-08-21 | 2020-11-24 | 济南大学 | Controllable slow-release fertilizer and preparation method thereof |
-
2019
- 2019-04-09 CN CN201910281770.0A patent/CN109987916B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109987916A (en) | 2019-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101538135B (en) | Vegetation form cellular concrete and method for preparing same | |
| CN107963838B (en) | Ecological spray anchor slope protection structure and method | |
| CN102010155A (en) | High-strength plant growing type porous concrete and preparation method thereof | |
| CN102604643B (en) | Windproof sand solidification agent for desert planting | |
| CN109777430B (en) | PH controlled-release microcapsule type high-molecular saline-alkali soil improver and preparation method thereof | |
| CN107814500A (en) | A kind of eco-concrete binder materials and neutral eco-concrete | |
| Skrzypczak et al. | Biodegradable hydrogel materials for water storage in agriculture-review of recent research | |
| CN109626950A (en) | Ecological slope protection concrete and its construction method | |
| CN112980451A (en) | Soil conditioner applied to ecological slope protection and soil improvement method thereof | |
| CN111903467A (en) | Process for improving marine silt for planting soil | |
| CN109534739B (en) | Environment-friendly ecological concrete and preparation process thereof | |
| CN110698167A (en) | Phosphate light plant-growing concrete and preparation method and application thereof | |
| CN110330980B (en) | Degradable self-repairing water-retaining sand-fixing agent and preparation method thereof | |
| CN109970379B (en) | Degradable aggregate with fertilizer efficiency slow-release performance and preparation method thereof | |
| CN109987916B (en) | Degradable phosphate cement-based aggregate with fertilizer efficiency slow-release performance and preparation method thereof | |
| KR101863044B1 (en) | Greening Soil Stabilizer and Greening Method | |
| CN106212100B (en) | Slope protection vegetation type asphalt mixture containing planting matrix and preparation method and application thereof | |
| CN110240451B (en) | Greening concrete and construction method thereof | |
| CN109792935B (en) | Scour-resistant fiber spray-seeding matrix and application thereof in slope ecological restoration process | |
| CN115403342B (en) | Low-carbon plant-growing concrete and preparation method thereof | |
| CN110590454A (en) | Slow/controlled release fertilizer and preparation method thereof | |
| CN1487052A (en) | Saline-alkaline land modifier | |
| CN108384555A (en) | A kind of arid area transplanting soil water-retaining gel and preparation method thereof | |
| CN114907047A (en) | Ecological concrete additive and ecological concrete | |
| CN105622286A (en) | Water-retention sand-fixing material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |