Construction waste unfired hollow brick and plant regenerated material composite sand barrier method

Abstract

The invention relates to a construction waste baking-free hollow brick and plant regeneration material composite sand barrier method, and relates to the technical field of sand control. The method comprises the following steps: S1, preparing the unfired hollow brick by using the construction waste; s2, the unfired hollow bricks are arranged in a treatment area; s3, planting the plant root seedlings into and around the unfired hollow brick. The construction waste unfired hollow brick and plant regenerated material composite sand barrier method can fix quicksand, realizes construction waste resource recycling, solves the problems of environmental pollution caused by construction waste, short service life of wheat straw square sand barriers, poor wind prevention and sand fixation effects and the like, and aims to improve the wind prevention and sand fixation benefits and the vegetation survival rate. And a three-in-one sand industry comprehensive mode system of garbage treatment, sand prevention and control and economic development is formed.

Description

Technical Field

[0001] The present application relates to the technical field of sand control, and in particular to a method for forming a composite sand barrier using unburned hollow bricks of construction waste and plant-regenerated materials. Background Art

[0002] Under the influence of climate change, wind and sand disasters frequently occur in arid sandy areas, and the deterioration of the ecological environment such as sandstorm hazards poses a huge threat to regional ecological security and social development. At present, although the traditional sand control engineering and comprehensive sand fixation technology such as wheat straw, clay, gravel, and nylon net mechanical sand barriers have effectively curbed the process of desertification. However, due to the limitations of many factors such as the decline of artificial vegetation, the durability of wheat straw sand barriers, poor sand fixation effect, high manufacturing cost, and environmental pollution caused by nylon net sand barriers, the research and development and application of plant regeneration sand barrier technology and key technologies of plant-engineering sand fixation composite sand barriers are still weak links, affecting the sustainability of sand control effects and ecological restoration.

[0003] In recent years, with the rapid advancement of new urbanization and urbanization, the amount of construction waste has increased rapidly, of which construction waste accounts for 30-40% of the total waste, causing serious waste of resources and environmental pollution. Traditional treatment methods such as landfill and incineration not only occupy a large amount of land resources, but also cause secondary pollution to the environment. However, the current recycling rate of construction waste is only about 5%. How to effectively deal with construction waste, realize the resource utilization of construction waste, and solve the phenomenon of "garbage surrounding the village" has become the focus of social attention. Therefore, innovating the waste resource utilization model and guiding natural sand-fixing plants to form plant regeneration sand barriers through the construction waste hollow brick technology is a new attempt to turn waste into treasure in terms of new sand-fixing processes and new materials. It will improve the level of my country's sand control technology and industry, and is expected to provide new solutions to solve the global desertification problem. Summary of the invention

[0004] The purpose of this application is to provide a composite sand barrier method of unfired hollow bricks of construction waste and plant regeneration materials. The method can fix quicksand, realize the recycling of construction waste resources, solve the problems of environmental pollution caused by construction waste, short life of wheat straw grid sand barriers, and poor wind and sand fixation effect. It aims to improve the efficiency of wind and sand fixation and the survival rate of vegetation, and form a comprehensive sand industry model system of "three-in-one" garbage disposal, sand prevention and control, and economic development.

[0005] In order to achieve the above object, the present invention provides a method for composite sand barrier of unburned hollow bricks of construction waste and plant regeneration materials, the method comprising:

[0006] S1: Preparation of unburned hollow bricks using construction waste;

[0007] S2: Arrange the unburned hollow bricks in the treatment area;

[0008] S3: Plant the plant roots and seedlings inside and around the unfired hollow bricks.

[0009] In an optional embodiment, S1 includes:

[0010] First, the construction waste is sorted and processed, the unusable parts are removed, and the usable raw materials are retained;

[0011] Secondly, the usable raw materials are crushed by a hammer crusher, and the aggregates with a particle size of <0.15mm are separated by screening equipment;

[0012] Then, according to the formula of the unfired hollow brick, the aggregate and the additive are evenly mixed to form a mixture;

[0013] Finally, the mixture is pressed into unfired hollow bricks using a pressing machine using a hollow brick mold.

[0014] In an optional embodiment, the formula is calculated by weight percentage of raw materials as follows: aggregate, waste concrete, cement, waste bricks, fly ash, attapulgite binder, gypsum, cementitious material and water account for 32.7% to 32.8%, 6.6% to 8.2%, 10.0% to 11.7%, 10.7% to 10.9%, 2.6% to 3.6%, 10.7% to 10.9%, 4.7% to 5.4%, 9.3% to 9.4% and 9.3% to 10.0%, respectively.

[0015] In an optional embodiment, the unfired hollow brick includes an outer hexagonal frame, an inner circular structure and spokes, wherein the inner circular structure is arranged inside the outer hexagonal frame and connected to the outer hexagonal frame through the spokes.

[0016] In an optional embodiment, S2 includes:

[0017] The unfired hollow bricks are arranged on the surface of the sand dunes in the treatment area, and the extension direction of the unfired hollow bricks is perpendicular to the main wind direction.

[0018] In an optional embodiment, S2 includes:

[0019] Place the two adjacent rows of unfired hollow bricks in staggered positions.

[0020] In an optional embodiment, in S3, the plant root shoots include Haloxylon ammodendron, Atriplex canescens and Glycyrrhiza uralensis.

[0021] In an optional embodiment, S3 includes:

[0022] Before planting the plant seedlings, plant seedlings are first grown. Seeds of Haloxylon ammodendron, Atriplex quadrangularis and Glycyrrhiza uralensis are selected and grown in the open field in a seedbed in a greenhouse.

[0023] In an optional embodiment, S3 includes:

[0024] Single Haloxylon ammodendron is planted in a hole-shaped pattern inside the inner circular structure of the unfired hollow bricks; licorice is planted in the squares between the outer hexagonal frame and the inner circular structure; trenches are opened between the unfired hollow bricks to form strip-shaped sand barriers perpendicular to the wind direction.

[0025] In an optional embodiment, S3 includes:

[0026] The following method is used for the establishment of cuttings of Atriplex canescens: dig a narrow trench with a width of 20-30cm and a depth of 40-50cm; select one-year-old branches from the mother plant as cuttings, and place one 50-80cm long spike with the bud tip facing upward at an interval of 20cm for cutting propagation, and keep the spike length of 10-20cm on the ground.

[0027] The beneficial effects of the composite sand barrier method of construction waste unburned hollow bricks and plant regeneration materials provided by the present invention include:

[0028] 1. The production process of the unfired hollow bricks in this method does not require high-temperature calcination, which saves energy, reduces pollution, and realizes the recycling of waste resources;

[0029] 2. Compared with traditional sand prevention and control methods, hollow brick sand barriers are mechanical sand barriers, which are particularly suitable for fixing mobile sand dunes at the edge of the desert. They can inhibit soil evaporation and have good water permeability and water retention. Rainwater is collected in the rainy season and slowly released during droughts to increase soil moisture content and water retention capacity. The survival rate of vegetation is improved through water collection, which is conducive to enhancing the stability of sand barriers and their wind-proof and sand-fixing functions, and providing the necessary moisture conditions for the formation of plant regeneration sand barriers.

[0030] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A flow chart of a method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials provided in an embodiment of the present application;

[0033] Figure 2 The schematic diagram of the structure of the unfired hollow brick;

[0034] Figure 3 A schematic diagram of the first layout for planting plant roots and seedlings inside and around unfired hollow bricks;

[0035] Figure 4 A second layout diagram for planting plant roots and seedlings inside and around unfired hollow bricks;

[0036] Figure 5 A schematic diagram of a third layout for planting plant seedlings inside and around unfired hollow bricks.

[0037] Icons: 1-unfired hollow brick; 2-external hexagonal frame; 3-inner circular structure; 4-spokes; 5-plant roots and seedlings. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Please refer to Figure 1 This embodiment provides a method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials (hereinafter referred to as: method), the method comprising the following steps:

[0042] S1: Preparation of unfired hollow bricks 1 using construction waste.

[0043] First, the construction waste is classified and processed, the unusable parts are removed, and the usable raw materials are retained; secondly, the usable raw materials are crushed by a hammer crusher, and the aggregates with a particle size of <0.15mm are separated by a screening device, and sent to the raw material preparation site by a belt conveyor; then, according to the formula of the unburned hollow brick 1, the aggregates are mixed with an appropriate amount of cement, water and other additives to form a mixture. Finally, the mixture is pressed into the unburned hollow brick 1 by a press using a hollow brick mold with an outer hexagon and an inner round shape, and then naturally air-dried and solidified after manual or mechanical stacking.

[0044] Among them, the formula scheme is calculated by weight percentage of raw materials as follows: aggregate, waste concrete, cement, waste bricks, fly ash, attapulgite binder, gypsum, cementitious material and water account for 32.7% to 32.8%, 6.6% to 8.2%, 10.0% to 11.7%, 10.7% to 10.9%, 2.6% to 3.6%, 10.7% to 10.9%, 4.7% to 5.4%, 9.3% to 9.4% and 9.3% to 10.0% respectively.

[0045] The mineral composition of unfired bricks was determined by D / Max2200PCX-ray diffractometer, and the proportions of SiO2, Fe2O3, Al2O3, CaO, TiO2, MgO, K2O and Na2O were 50.0%-58.5%, 2.5%-3.2%, 4.8%-5.3%, 4.9%-5.5%, 0.26%-0.30%, 1.23%-1.67%, 0.75%-0.86% and 1.26%-1.89%, respectively.

[0046] Among them, please refer to Figure 2 The unfired hollow brick 1 includes an outer hexagonal frame 2, an inner circular structure 3 and spokes 4. The inner circular structure 3 is arranged inside the outer hexagonal frame 2 and connected to the outer hexagonal frame 2 through the spokes 4. The diameter of the outer hexagonal frame 2 is 200 cm, the diameter of the inner circular structure 3 is 100 cm, the height of the spoke 4 is 10 cm, and the width of the spoke 4 is 10 cm. At the same time, the flexural strength of the hollow brick mold after 7 days is measured by a 4101 universal testing machine, which is 1.20-2.85 MPa and the compressive strength is 5.50-9.0 MPa.

[0047] S2: Arrange the unfired hollow bricks 1 in the treatment area.

[0048] The treatment area can be a mobile sand dune area at the edge of the desert, and the unburned hollow bricks 1 are arranged on the surface of the sand dunes, and the extension direction of the unburned hollow bricks 1 is perpendicular to the main wind direction. In mobile sand, the spacing of the unburned hollow bricks 1 is 100 cm; in semi-mobile sand, the spacing of the unburned hollow bricks 1 is 150 cm, and two adjacent rows of unburned hollow bricks 1 are staggered.

[0049] S3: Please refer to Figures 3 to 5 , plant root seedlings 5 ​​are planted inside and around the unfired hollow bricks 1.

[0050] Before planting the plant seedlings 5, plant seedlings can also be raised first. Select the seeds of Haloxylon ammodendron, Atriplex canescens and Licorice with large and full seed setting rates, and raise seeds in the open field in the greenhouse. Specifically, a hole sowing machine is used for sowing, the sowing depth is 1.0-1.5 cm, the hole spacing × row spacing is 8 cm × 12 cm, 2 seeds / hole -1 .

[0051] Haloxylon ammodendron (CAMey.) Bunge is a shrub or small tree of the genus Haloxylon of the Amaranthaceae family. It is drought-resistant, cold-resistant, high-temperature-resistant, saline-alkali-resistant, and barren-resistant. It is a pioneer tree species for windbreak and sand fixation and is known as the "desert guard". Haloxylon ammodendron is also the host of Cistanche ambigua, which is known as the "desert ginseng". It is a traditional Chinese precious herbal medicine with nourishing, health-care, and strengthening effects, and its economic value is considerable.

[0052] Atriplex canescens (Pursh) Nutt. is a perennial C4 semi-evergreen shrub of the Chenopodiaceae family, native to the deserts of western North America. As this species is a typical salt-secreting halophyte with strong salt-alkali, drought and high temperature tolerance, it is widely used in saline-alkali land improvement and desertification prevention in arid and semi-arid areas of the world.

[0053] Licorice (English name: Glycyrrhiza uralens is Fisch), a perennial herb of Leguminosae and Glycyrrhiza genus, has thick roots and rhizomes and is a commonly used bulk tonic Chinese herbal medicine. Licorice grows mostly in arid and semi-arid sandy soils, desert edges and loess hilly areas. It is a drought-tolerant plant that can prevent wind and sand, curb desertification, and has good economic benefits when planted. It is a national second-level protected plant.

[0054] Then, plant root seedlings 5 ​​are planted. Specifically, in late autumn or spring, two-year-old bare-root seedlings are preferred, and the land is prepared in a hole-shaped or furrow-shaped manner. A single Haloxylon ammodendron is planted in a hole-shaped manner in the inner circular structure 3 of the unburned hollow brick 1, with a planting depth of 40 to 50 cm; licorice is planted as a precious medicinal material in the square between the outer hexagonal frame 2 and the inner circular structure 3, with a hole spacing × row spacing of 10 cm × 15 cm and 18 cm × 20 cm, and a planting depth of 15 to 20 cm; four-winged Atriplex is planted as a regenerated sand barrier by furrow-shaped land preparation between the unburned hollow bricks 1, forming a row-shaped sand barrier perpendicular to the wind direction, wherein the hole spacing × row spacing of 10 cm × 12 cm and 15 cm × 20 cm, and the planting depth is 35 to 45 cm.

[0055] The following method is used for the establishment of cuttings of Atriplex canescens: dig a narrow trench with a width of 20-30cm and a depth of 40-50cm; select healthy one-year-old branches on the mother plant as cuttings, and place one 50-80cm long spike with the bud tip facing upward at an interval of 20cm for cutting propagation, and keep the spike length of 10-20cm on the ground.

[0056] When the coverage of the plant sand barrier reaches 30-40%, the unfired hollow brick 1 sand barrier is removed for reuse.

[0057] The beneficial effects of the composite sand barrier method of construction waste unburned hollow bricks and plant regeneration materials provided in this embodiment include:

[0058] 1. The method does not require high-temperature calcination in the production process of the unfired hollow brick 1, thus saving energy, reducing pollution, and realizing the recycling of waste resources;

[0059] 2. Compared with traditional sand prevention and control methods, hollow brick sand barriers are mechanical sand barriers, which are particularly suitable for fixing mobile sand dunes at the edge of the desert. They can inhibit soil evaporation and have good water permeability and water retention. Rainwater is collected in the rainy season and slowly released during droughts to increase soil moisture content and water retention capacity. The survival rate of vegetation is improved through water collection, which is conducive to enhancing the stability of sand barriers and their wind-proof and sand-fixing functions, and providing the necessary moisture conditions for the formation of plant regeneration sand barriers;

[0060] 3. As a renewable biological sand barrier, Atriplex canescens is easy to plant and has a high survival rate. It can be planted as seedlings or cuttings according to actual conditions. The sand barrier has a simple structure and low cost.

[0061] 4. Haloxylon ammodendron is drought-resistant and sand-bury-resistant, has a large root width, and has strong wind-proof and sand-fixing capabilities; Cistanche deserticola is a parasitic plant that lives on the roots of Haloxylon ammodendron and is a traditional precious Chinese medicinal material;

[0062] 5. Licorice is a tonic Chinese herbal medicine with strong adaptability, reproduction and stress resistance. It has a high survival rate in sandy soil, the sand barrier structure is simple and has high economic benefits.

[0063] In summary, this embodiment solves the problem of environmental pollution caused by construction waste through waste resource utilization, aims to provide an effective way for sand prevention and control and vegetation restoration, and achieves the goal of long-term stable control of quicksand, which has important ecological, economic and social benefits.

[0064] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0065] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials, characterized in that: The method comprises: S1: Using construction waste to prepare unfired hollow bricks (1); S2: arranging the unfired hollow bricks (1) in the treatment area; S3: Planting plant seedlings (5) inside and around the unfired hollow bricks (1).

2. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 1 is characterized in that: S1 includes: First, the construction waste is classified and processed, unusable parts are removed, and usable raw materials are retained; Secondly, the usable raw materials are crushed by a hammer crusher, and aggregates with a particle size of less than 0.15 mm are separated by a screening device; Then, according to the formula of the unfired hollow brick (1), the aggregate and the additive are mixed evenly to form a mixture; Finally, the mixture is pressed into unfired hollow bricks (1) using a hollow brick mold and a pressing machine.

3. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 2 is characterized in that: The formula is calculated by weight percentage of raw materials as follows: the proportions of aggregate, waste concrete, cement, waste bricks, fly ash, attapulgite binder, gypsum, cementitious material and water are 32.7%-32.8%, 6.6%-8.2%, 10.0%-11.7%, 10.7%-10.9%, 2.6%-3.6%, 10.7%-10.9%, 4.7%-5.4%, 9.3%-9.4% and 9.3%-10.0%, respectively.

4. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 2 is characterized in that: The unfired hollow brick (1) comprises an outer hexagonal frame (2), an inner circular structure (3) and spokes (4); the inner circular structure (3) is arranged inside the outer hexagonal frame (2) and is connected to the outer hexagonal frame (2) via the spokes (4).

5. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 4, characterized in that S2 include: The unfired hollow bricks (1) are arranged on the surface of the sand dunes in the treatment area, and the extension direction of the unfired hollow bricks (1) is perpendicular to the main wind direction.

6. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 5 is characterized in that: S2 includes: The two adjacent rows of unfired hollow bricks (1) are arranged in a staggered manner.

7. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 4 is characterized in that: In S3, the plant root seedlings (5) include Haloxylon ammodendron, Atriplex canescens and Glycyrrhiza uralensis.

8. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 7, characterized in that S3 include: Before the plant root seedlings (5) are planted, plant seedlings are first grown, and seeds of Haloxylon ammodendron, Atriplex canescens and Glycyrrhiza uralensis are selected and grown in a greenhouse in an open-field seedbed.

9. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 7, characterized in that S3 include: A single Haloxylon ammodendron is planted in a hole-like shape inside the inner circular structure (3) of the unfired hollow brick (1); liquorice is planted in the squares between the outer hexagonal frame (2) and the inner circular structure (3); and strip-shaped land is prepared by opening trenches between the unfired hollow bricks (1) and planting Atriplex canescens to form a strip-like sand barrier with a direction perpendicular to the wind direction.

10. The method for composite sand barrier of construction waste unburned hollow bricks and plant regeneration materials according to claim 7, characterized in that S3 include: The four-winged Atriplex cuttings are planted by the following method: digging a narrow trench with a width of 20-30 cm and a depth of 40-50 cm; selecting one-year-old branches on the mother plant as cuttings, and placing one 50-80 cm long spike with the bud tip facing upward at an interval of 20 cm for cutting propagation, and retaining the spike on the ground with a length of 10-20 cm.

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