A grass-planting ball based on neutral regenerated micro powder and a preparation method thereof

Abstract

The application discloses a grass planting ball based on neutral regenerated micro powder and a preparation method thereof, which comprises the following components in percentage by mass: 70-80% of neutral regenerated micro powder, 1-3% of plant fiber, 20-30% of nutrient powder, 0.1-1% of vegetation seed, 1-2% of dextrin powder and the balance of water. The grass planting ball follows the pore structure characteristics of the natural growth law of herbaceous root systems, utilizes the mutual synergistic effect of the components, has good water permeability and water retention performance, has a remarkable carbon fixation effect, fully utilizes solid waste resources, has important economic value and environmental protection value, significantly improves the physiological environment of plant growth, improves the vegetation effect, can improve the anti-scouring capacity and finally improves the survival rate and coverage rate of the grass.

Description

Technical Field

[0001] This invention relates to the field of green ecology and waste resource utilization technology, and more specifically, to a grass ball based on neutral regenerated micro powder and its preparation method. Background Technology

[0002] Vegetation growth is closely related to environmental conditions. Heavy rains can erode soil, leading to soil degradation. Currently, composite materials for consolidating vegetation are often used to promote growth and stabilize soil. These materials effectively bind soil particles and form a protective film on the surface, but they have poor soil moisture retention and aeration, limiting their effectiveness in promoting vegetation growth. Grass pavers, for example, patent CN114772994A discloses a grass paver with a central planting hole. This design prevents soil erosion and significantly improves water retention, promoting better plant growth. However, freeze-thaw cycles inevitably affect its durability, reducing vegetation survival rates. Furthermore, vegetation only grows within the central hole of the paver, resulting in low coverage.

[0003] The utilization of waste concrete has significant economic benefits. Rational use of waste can save costs and reduce the expenses of traditional landfill disposal. Neutral recycled micro-powder refers to micro-powder with a particle size of less than 300µm obtained by crushing and grinding waste concrete blocks. The recycling of neutral recycled micro-powder fully realizes its economic value and also reduces the environmental damage caused by solid waste.

[0004] There is currently no research showing that using neutral regenerated micro powder to prepare grass balls has water retention and air permeability, while also improving the planting effect, vegetation survival rate, and coverage. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned defects in the existing technology, effectively utilize neutral regenerated micro powder, and provide a grass ball based on neutral regenerated micro powder with good water retention, water permeability and good planting effect, as well as its preparation method. This solves the problem that current traditional grass planting materials do not have high water retention and water permeability, which is not conducive to plant growth and results in poor survival rate and coverage.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A grass-planting ball based on neutral regenerated micro powder comprises the following components by weight percentage: 70%–80% neutral regenerated micro powder, 1%–3% plant fiber, 20%–30% nutrient powder, 0.1%–1% plant seeds, 1%–2% dextrin powder, and the balance being water.

[0008] This invention also discloses a method for preparing grass-planting balls based on neutral regenerated micro powder as described above, comprising the following steps:

[0009] S1. Carbon dioxide is passed through waste concrete powder with a pH of 12.6 to carbonize it, resulting in neutral recycled micro powder with a pH of 8.6.

[0010] S2. The neutral regenerated micro powder is mixed with plant fiber, nutrient powder, plant seeds and dextrin powder to obtain a neutral mixed powder;

[0011] S3. The mixed powder is sprayed with water to form granules, and then consolidated and dried to obtain the grass ball.

[0012] Implementing the embodiments of the present invention will have the following beneficial effects:

[0013] This invention comprehensively considers the microstructural characteristics of the planting ball, such as its pore structure, porosity, and number of pores, as well as the physiological growth characteristics of vegetation. This helps to provide a scientifically sound and favorable growth space and conditions for plant roots, thereby improving plant vigor and coverage, and thus has several positive implications:

[0014] 1. Compared with the commonly used grass pavers, the grass balls of this invention, which use neutral recycled micro powder as the main raw material, are low in cost and have significant economic benefits. They realize high-value-added utilization technology of waste resources, achieving a major breakthrough in the waste resource utilization industry. They do not generate secondary pollution such as dust and have important economic and environmental value.

[0015] 2. This invention utilizes the carbonizable properties of neutral regenerated micro powder. After carbonization, it becomes weakly alkaline, and when combined with acidic nutrient powder, it becomes neutral. On the one hand, it creates a suitable environment for vegetation growth, promoting rapid plant growth. On the other hand, the carbonization reaction is beneficial for waste carbon sequestration, energy conservation, and emission reduction. The preparation process is simple and low-cost. Furthermore, the carbon sequestration effect of grass balls based on neutral regenerated micro powder is significant, which is conducive to reducing carbon emissions.

[0016] 3. The grass-planting ball of this invention utilizes the synergistic effect of its components, with controllable porosity and superior water retention and permeability. The nutrient soil provides nutrients for the plant seeds, while the cross-linked plant fibers enhance aeration, creating a suitable growing environment for the seeds. The grass-planting ball is sown using conventional methods, exhibiting good erosion resistance. Seeds germinate within 5-10 days, resulting in a high seed survival rate and wide applicability. This invention uses dextrin powder as a binder, which dissolves in water. Germinating grass seeds easily break through the grass-planting ball, effectively covering the soil with a layer of nutrient-rich insulating material, promoting better vegetation growth.

[0017] 4. This invention can be applied in a spreading manner, which is easy to construct and conducive to streamlined and large-scale production. The spherical surface of the spherical particles forms pores between the particles, and the interwoven pores form a continuous water transport channel. This is a feasible way to solve the problem of soil fixation and enable full coverage of plant growth. It can effectively slow down rainwater erosion, reduce soil loss, and improve the survival rate of vegetation. It can also retain soil moisture and enhance the aeration of vegetation.

[0018] Therefore, this invention follows the pore structure characteristics of the natural growth law of herbaceous roots, utilizes the synergistic effect of the components, has good water permeability and water retention performance, while also having a significant carbon fixation effect and making full use of solid waste resources, thus having important economic and environmental value; it significantly improves the physiological environment for plant growth, enhances the vegetation effect, can improve erosion resistance, and ultimately improves the survival rate and coverage of grass. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments, but this does not limit the present invention in any way.

[0020] This invention discloses a grass ball based on recycled waste concrete powder, comprising the following components by weight percentage: 70%–80% neutral recycled powder, 1%–3% plant fiber, 20%–30% nutrient powder, 0.1%–1% plant seeds, 1%–2% dextrin powder, and the balance being water.

[0021] Specifically, the roles and synergistic effects of each component in this invention are as follows: First, this invention utilizes the carbonizable properties of neutral regenerated micro-powder. After carbonization, it becomes weakly alkaline, which, when mixed with acidic fertilizer powder, becomes neutral. This creates a suitable environment for vegetation growth, promoting rapid plant growth. Furthermore, the carbonization reaction is beneficial for waste carbon sequestration, energy conservation, and emission reduction. The preparation process is simple and low-cost. Simultaneously, the grass balls based on neutral regenerated micro-powder exhibit significant carbon sequestration effects, contributing to reduced carbon emissions. Second, utilizing the porous structure and controllable pore size of neutral regenerated micro-powder, the prepared grass balls possess excellent water retention and permeability, allowing them to obtain sufficient moisture while continuously providing water to the grass plants. Further, this invention incorporates nutrient powder into the neutral regenerated micro-powder, providing nutrients for plant seeds. Combined with the cross-linked plant fibers, this provides a breathable environment for seed growth, while also exhibiting good erosion resistance. Seeds germinate and grow within 5-10 days, resulting in a high seed survival rate and wide applicability. Furthermore, this invention uses dextrin powder as a binder, which promotes soil particle aggregation, increases the number of soil aggregates, improves soil water retention and biological activity, and dissolves in water. Germinating grass seeds can easily break through the planting ball, and the broken planting ball is equivalent to covering the soil with a layer of nutrient-insulating residue, helping the vegetation grow better. Therefore, neutral regenerated micro powder, plant fiber, nutrient soil, vegetation seeds, and dextrin powder have a synergistic effect, playing a role in water retention and permeability, while enhancing erosion resistance, improving plant rooting, germination, and growth speed, and the porous structure of the planting ball can also provide oxygen for plant roots to breathe, preventing root rot and plant death caused by excessive external moisture.

[0022] In one specific embodiment, the particle size of the grass balls is 5mm to 20mm.

[0023] In one specific embodiment, the particle size of the grass balls includes, but is not limited to, 5mm, 10mm, 15mm, 20mm, etc.

[0024] In one specific embodiment, the porosity of the grass balls is 15% to 30%.

[0025] In one specific embodiment, the particle size of the neutral regenerated micro powder is 1µm to 300µm.

[0026] In one specific embodiment, the neutral regenerated micro powder of the present invention is divided into the following three particle sizes: first particle size: 1-100 μm; second particle size: 100-200 μm; third particle size: 200-300 μm. Different porosities can be obtained by preparing grass-planting balls from each particle size of the regenerated micro powder. The mixing mass ratio of the first, second, and third particle sizes is (0-10):(0-10):(0-10).

[0027] Specifically, the porosity of grass balls directly affects the plant's growth space and growth path, playing an important role in the plant's living environment and root growth distribution. Based on this, this invention comprehensively considers the microstructural characteristics of neutral regenerated micro powder, such as pore structure, porosity, and number of pores, as well as the physiological growth characteristics of vegetation. It uses a multi-particle size rational gradation to regulate the porosity of grass balls, which helps to provide a scientific and good growth space and conditions for plant root growth, thereby improving plant growth vitality and coverage.

[0028] In one specific embodiment, the length of the plant fiber is 0.1 mm to 2.0 mm.

[0029] In one specific embodiment, the length of the plant fiber includes, but is not limited to, 0.1 mm, 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, etc.

[0030] In one specific embodiment, the nutrient powder is an acidic fertilizer powder with a particle size ≤150um.

[0031] In one specific embodiment, the vegetation seeds include one or more of bermudagrass, tall fescue, ryegrass, red fescue, and Kentucky bluegrass.

[0032] Furthermore, this invention also discloses a simple, controllable, and mild method for preparing grass balls based on neutral regenerated micropowder, comprising the following steps:

[0033] S1. Carbon dioxide is passed through waste concrete powder with a pH of 12.6 to carbonize it, resulting in neutral recycled micro powder with a pH of 8.6.

[0034] Specifically, neutral regenerated micro powder is prepared by carbonization of initially regenerated micro powder with a pH of 12.6 by introducing carbon dioxide.

[0035] In one specific embodiment, the carbonization conditions in step S1 are: carbon dioxide concentration of 20% to 99%, carbonization pressure of 0.1 MPa to 0.3 MPa, carbonization temperature of 15°C to 25°C, and carbonization time of 8h to 12h.

[0036] S2. The carbonized neutral regenerated micro powder is mixed with plant fiber, nutrient powder, plant seeds and dextrin powder to obtain a mixed powder.

[0037] S3. Spray water to granulate the mixed powder, and then dry it after consolidation to obtain grass balls.

[0038] In one specific embodiment, the mixing ratio of the powder to water is 1:(0.25~0.3).

[0039] In one specific embodiment, the consolidation drying temperature is 30°C to 40°C.

[0040] Specifically, the preparation process of this invention is simple, makes full use of solid waste resources, has low material costs, and is green and pollution-free.

[0041] Furthermore, the grass balls of this invention can be spread in practical applications without the need for special construction equipment, making construction easy and conducive to streamlined and large-scale production, while also having low raw material costs. The spherical surface of the spread grass balls forms pores between the particles, and these pores interweave to create continuous water transport channels. This is a feasible way to solve soil fixation problems and achieve full plant coverage, effectively mitigating rainwater erosion, reducing soil loss, and improving vegetation survival rates. It also helps retain soil moisture, enhances vegetation aeration, and ensures that vegetation growth is not limited to the central hole of the grass block. Therefore, the seed germination rate, survival rate, and coverage rate of the grass balls of this invention are significantly better than those of traditional grass blocks.

[0042] The following are specific embodiments.

[0043] Example 1

[0044] The grass ball based on recycled waste concrete powder in this embodiment comprises the following components by weight percentage: 80% neutral recycled powder, 1% plant fiber with a length of 0.5 mm, 16% nutrient powder, 1% tall fescue, 2% dextrin powder, and the balance being water.

[0045] The neutral regenerated micro powder of this invention is divided into the following three particle sizes: first particle size: 1-100 μm; second particle size: 100-200 μm; third particle size: 200-300 μm. The mixing mass ratio of the first, second, and third particle sizes is 8:1:1.

[0046] The method for preparing grass-planting balls in this embodiment includes the following steps:

[0047] S1. Waste concrete powder with a pH of 12.6 is carbonized by passing carbon dioxide through it to obtain neutral recycled micro powder with a pH of 8.6. The carbonization conditions are: carbon dioxide concentration of 99%, carbonization gas pressure of 0.3 MPa, carbonization temperature of 18℃~22℃, and carbonization time of 12h.

[0048] S2. Mix the neutral regenerated micro powder with plant fiber, nutrient soil, plant seeds and dextrin powder to obtain a mixed powder.

[0049] S3. The mixed powder is granulated by spraying water in sequence. The mixing ratio of the mixed powder and water is 1:0.3. The mixture is placed in an indoor ventilated environment until it solidifies and then dried at a low temperature in a 40°C drying oven to obtain grass balls.

[0050] Example 2

[0051] The grass ball based on recycled waste concrete powder in this embodiment comprises the following components by weight percentage: 76% neutral recycled powder, 1% plant fiber with a length of 0.5 mm, 20% nutrient powder, 1% tall fescue, 2% dextrin powder, and the balance being water.

[0052] The neutral regenerated micro powder of the present invention is divided into the following three particle sizes: first particle size: 1-100 μm; second particle size: 100-200 μm; third particle size: 200-300 μm, and the mixing mass ratio of the first particle size, the second particle size and the third particle size is 2:7:1.

[0053] The method for preparing grass-planting balls in this embodiment includes the following steps:

[0054] S1. Waste concrete powder with a pH of 12.6 is carbonized by passing carbon dioxide through it to obtain neutral recycled micro powder with a pH of 8.6. The carbonization conditions are: carbon dioxide concentration of 99%, carbonization gas pressure of 0.3 MPa, carbonization temperature of 18℃~22℃, and carbonization time of 12h.

[0055] S2. Mix the neutral regenerated micro powder with plant fiber, nutrient soil, plant seeds and dextrin powder to obtain a mixed powder.

[0056] S3. The mixed powder is granulated by spraying water in sequence. The mixing ratio of the mixed powder and water is 1:0.3. The mixture is placed in an indoor ventilated environment until it solidifies and then dried at a low temperature in a 40°C drying oven to obtain grass balls.

[0057] Example 3

[0058] The grass ball based on recycled waste concrete powder in this embodiment comprises the following components by weight percentage: 71% neutral recycled powder, 1% plant fiber with a length of 0.5 mm, 25% organic soil with rooting powder, 1% tall fescue, 2% dextrin powder, and the balance being water.

[0059] The neutral regenerated micro powder of this invention is divided into the following three particle sizes: first particle size: 1-100 μm; second particle size: 100-200 μm; third particle size: 200-300 μm. The mixing mass ratio of the first, second, and third particle sizes is 1:2:7.

[0060] The method for preparing grass-planting balls in this embodiment includes the following steps:

[0061] S1. Waste concrete powder with a pH of 12.6 is carbonized by passing carbon dioxide through it to obtain neutral recycled micro powder with a pH of 8.6. The carbonization conditions are: carbon dioxide concentration of 99%, carbonization gas pressure of 0.3 MPa, carbonization temperature of 18℃~22℃, and carbonization time of 12h.

[0062] S2. Mix the neutral regenerated micro powder with plant fiber, nutrient soil, plant seeds and dextrin powder to obtain a mixed powder.

[0063] S3. The mixed powder is granulated by spraying water in sequence. The mixing ratio of the mixed powder and water is 1:0.3. The mixture is placed in an indoor ventilated environment until it solidifies and then dried at a low temperature in a 40°C drying oven to obtain grass balls.

[0064] Example 4

[0065] The only difference between this embodiment and Example 1 is that the particle size of the neutral regenerated micro powder is only 1um-100um.

[0066] Example 5

[0067] The only difference between this embodiment and Example 1 is that the particle size of the neutral regenerated micro powder is only 100um-200um.

[0068] Example 6

[0069] The only difference between this embodiment and Example 1 is that the particle size of the neutral regenerated micro powder is only 200um-300um.

[0070] Comparative Example 1

[0071] The only difference between this comparative example and Example 1 is that the regenerated micro powder was not carbonized.

[0072] Test case

[0073] The performance test data obtained from Examples 1-6 and Comparative Example 1 are shown in the table below.

[0074] Particle size (mm) Porosity (%) Coverage (%) Example 1 0-20 15.2 90 Example 2 0-20 19.8 98 Example 3 0-20 24.3 96 Example 4 0-20 14.3 88 Example 5 0-20 18.6 90 Example 6 0-20 28 84 Comparative Example 1 0-20 14.6 42

[0075] A comparison of the test results from Examples 1 and 4-6 shows that the particle size of the neutral regenerated micro-powder directly affects the porosity of the grass balls. If the first-grade neutral regenerated micro-powder is used to prepare the grass balls, the porosity decreases significantly as smaller-diameter micro-powder fills the interior of the grass balls. This decrease in porosity negatively impacts the germination rate and subsequent growth of plant seeds. When the second-grade neutral regenerated micro-powder is used, the contact area between the micro-powder particles is reduced, and there is no fine aggregate to fill the internal voids, thus achieving a higher porosity. However, the inter-particle adhesion is poor. In Example 1, when the three particle sizes were graded to prepare the grass balls, the smaller-diameter regenerated micro-powder filled the spaces between the larger-diameter particles, thereby controlling the optimal porosity of the grass balls. This maintains both suitable porosity and better air permeability. Furthermore, the proportions of each component in the grass balls also have a certain impact on their performance. The grass balls prepared using the raw materials of Example 1 with a specific ratio gradation showed significantly improved performance and achieved better growth results.

[0076] The test results of Example 1 and Comparative Example 1 show that, due to the alkalinity of the uncarbonized regenerated micropowder, the prepared grass balls have a high alkalinity internal environment, which does not meet the environmental requirements for plant growth. In contrast, Example 1 uses a neutral regenerated micropowder after carbonization, which creates a suitable environment for vegetation growth, promoting rapid plant growth. Furthermore, the carbonization reaction is beneficial for waste carbon sequestration, energy conservation, and emission reduction. The preparation process is simple and low-cost. Additionally, the grass balls based on neutral regenerated micropowder exhibit significant carbon sequestration effects, contributing to reduced carbon emissions.

[0077] Based on the above results, it can be seen that the present invention follows the pore structure characteristics of the natural growth law of herbaceous roots, utilizes the synergistic effect of components, has good water permeability and water retention performance, and makes full use of solid waste resources, thus having important economic and environmental value; it significantly improves the physiological environment for plant growth, enhances the vegetation effect, can improve erosion resistance, and ultimately improves the survival rate and coverage of grass.

[0078] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A grass ball based on neutral regenerated micro powder, characterized in that, Includes the following components by mass percentage: 70%~80% neutral regenerated micro powder, 1%~3% plant fiber, 20%~30% nutrient powder, 0.1%~1% plant seeds, 1%~2% dextrin powder and the balance being water; The size of the grass balls is 5mm~20mm; The porosity of the grass-planting balls is 15%~30%; The particle size of the neutral regenerated micro powder is 1µm to 300µm; The neutral regenerated micro powder has the following particle size distribution: 1µm~100µm first particle size; 100µm~200µm second particle size; 200µm~300µm third particle size; The mixing mass ratio of the first particle size, the second particle size and the third particle size is (0~10):(0~10):(0~10). The method for preparing grass-planting balls based on neutral regenerated micro powder includes the following steps: S1. Carbon dioxide is passed through waste concrete powder with a pH of 12.6 to carbonize it, resulting in neutral recycled micro powder with a pH of 8.

6. S2. The neutral regenerated micro powder is mixed with plant fiber, nutrient powder, plant seeds and dextrin powder to obtain a neutral mixed powder; S3. The mixed powder is sprayed with water to granulate, and then dried after consolidation to obtain the grass ball; In the carbonization process, the carbon dioxide concentration is 99%, the carbonization pressure is 0.3 MPa, the carbonization temperature is 15℃~25℃, and the carbonization time is 8h~12h.

2. The grass ball based on neutral regenerated micro powder according to claim 1, characterized in that, The length of the plant fiber is 0.1 mm to 2.0 mm; The nutrient powder is an acidic fertilizer powder with a particle size ≤150um; The plant seeds include one or more of the following: bermudagrass, tall fescue, ryegrass, red fescue, and Kentucky bluegrass.

3. The grass-planting ball based on neutral regenerated micro powder according to claim 1, characterized in that, In step S3, the mixing ratio of the mixed powder to water is 1:(0.25~0.3). The temperature for the consolidation drying is 30℃~40℃.