Preparation method of ecological concrete

Abstract

The invention discloses a preparation method of ecological concrete. The preparation method of the ecological concrete comprises the following steps: step 1, uniformly filling the bottom of a base with a first gravel base; 2, a main substrate layer is laid on the first gravel base; 3, a second gravel base is laid on the main substrate layer in a filling mode; 4, filling medium sand above the second macadam base; 5, fixing the first macadam base, the main substrate layer, the second macadam base and the medium sand together by using a gel material; step 6, spraying a modifier; and step 7, filling the upper part of the medium sand with soil. The first gravel base in the step 1 is gravel with the thickness of 200 mm and the particle size of 20-25 mm, and mainly plays a role in bearing and draining water. According to the preparation method of the ecological concrete, the obtained concrete is low in alkalinity, the vegetation growth condition can be guaranteed, the activity of microorganisms is improved, it is guaranteed that nutrients in soil are effectively absorbed, the porosity is large, the air permeability is high, and appropriate growth conditions are provided for plants.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological concrete preparation, and specifically relates to a method for preparing ecological concrete. Background Art

[0002] The pilot-scale constructed wetland system adopts the form of vertical subsurface flow constructed wetland, which consists of a distribution tank, three parallel subsurface flow wetland tanks, three water level regulating tanks, a collection tank, etc. The three subsurface flow wetland tanks have the same size. Three types of substrate configurations of vertical subsurface flow constructed wetlands are constructed in the subsurface flow wetland tanks with modified ecological concrete, ecological ceramsite, and gravel as the main substrate layers respectively. A submersible pump is installed in the distribution tank to provide water flow power, and the water inlet flow is adjusted by the water valve at the water inlet. The water in the distribution tank enters through the water distribution pipes above each subsurface flow wetland tank, flows through each substrate layer, and then flows into their respective water level regulating tanks through the collection pipes at the bottom, and finally converges into the collection tank through the drain outlets at the bottom of the water level regulating tanks. Among them, the modified ecological concrete is a special material that can be planted and prepared, and is usually used for ecological construction such as slope protection. The ecological concretes on the market are various and their preparation methods are also different; However, the current production process of ecological concrete is complicated, the production cost is high, the defective rate is high, it is not convenient to adapt to different geological conditions, the durability requirement is relatively high, the porosity and microbial content are not suitable for the growth of plants, the vegetation growth is not good, the root system is not developed enough, and it is easy to die. Therefore, we propose a method for preparing ecological concrete to solve the problems raised above. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for preparing ecological concrete to solve the problems in the above background art, that is, the current production process of ecological concrete is complicated, the production cost is high, the defective rate is high, it is not convenient to adapt to different geological conditions, the durability requirement is relatively high, the porosity and microbial content are not suitable for the growth of plants, the vegetation growth is not good, the root system is not developed enough, and it is easy to die.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A method for preparing ecological concrete, the method for preparing ecological concrete includes the following steps: Step 1: Uniformly fill a first gravel base at the bottom of the base; Step 2: Lay a main substrate layer above the first gravel base; Step 3: Fill a second gravel base above the main substrate layer; Step 4: Fill medium sand above the second gravel base: Step 5: Use a gel material to fix the first gravel base, the main substrate layer, the second gravel base, and the medium sand together; Step 6: Spray a modifier; Step 7: Fill soil above the medium sand.

[0005] Preferably, the first crushed stone base in step 1 is crushed stone with a thickness of 200 mm and a particle size of 20 - 25 mm, which mainly plays the role of supporting and draining water.

[0006] Preferably, the main matrix layer in step 2 is a modified ecological concrete test block with a thickness of 600 mm and a size of 150 mm × 150 mm × 150 mm, which is the main area for purifying water bodies.

[0007] Preferably, the modified ecological concrete test block is made of sandy loam, fly ash and volcanic rock, and aluminum sulfate and Bacillus subtilis biological agent are added thereto.

[0008] Preferably, the second crushed stone base in step 3 is crushed stone with a thickness of 50 mm and a particle size of 5 - 10 mm.

[0009] Preferably, the medium sand in step 4 is medium sand with a laying thickness of 150 mm for the second layer and a fineness modulus of 2.46.

[0010] Preferably, the gel material in step 5 is low-alkali cement, the cement contains 50% blast furnace slag, and the pH value is 9.

[0011] Preferably, the modifiers in step 6 are air-entraining agent, flocculant and water-retaining agent.

[0012] Preferably, the soil filling thickness in step 7 is 100 mm, and vegetation seeds are mixed in the soil. The seeds include 30% Verbena officinalis, 30% Elymus dahuricus, 20% Lantana camara, 10% Festuca elata and 10% Lavandula angustifolia.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: for the preparation method of this ecological concrete, the obtained concrete has a low alkalinity, which can ensure the growth of vegetation, improve the activity of microorganisms, ensure that the preparation can effectively absorb the nutrients in the soil, has a large porosity and strong air permeability, and provides suitable growth conditions for plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic composition diagram of the present invention.

[0015] In the figure: 1, base; 2, first crushed stone base; 3, main matrix layer; 4, second crushed stone base; 5, medium sand; 6, soil. DETAILED DESCRIPTION OF THE INVENTION

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figure 1-2 , the present invention provides a technical solution as follows: a method for preparing ecological concrete, and the method for preparing ecological concrete includes the following steps: Step 1: Uniformly fill the first crushed stone base 2 at the bottom of the base 1; Step 2: Lay the main matrix layer 3 above the first crushed stone base 2; Step 3: Fill and lay the second crushed stone base 4 above the main matrix layer 3; Step 4: Fill medium sand 5 above the second crushed stone base 4; Step 5: Use a gel material to fix the first crushed stone base 2, the main matrix layer 3, the second crushed stone base 4 and the medium sand 5 together; Step 6: Spray a modifier; Step 7: Fill soil 6 above the medium sand 5.

[0018] The first crushed stone base 2 in Step 1 is crushed stone with a thickness of 200 mm and a particle size of 20 - 25 mm, mainly playing the roles of supporting and draining.

[0019] The main matrix layer 3 in Step 2 is a modified ecological concrete test block with a thickness of 600 mm and a size of 150 mm × 150 mm × 150 mm. This layer is the main area for purifying water bodies.

[0020] The modified ecological concrete test block is made of sandy loam, fly ash and volcanic rock, and aluminum sulfate and Bacillus subtilis bioagent are added thereto.

[0021] The second crushed stone base 4 in Step 3 is crushed stone with a thickness of 50 mm and a particle size of 5 - 10 mm.

[0022] The medium sand 5 in Step 4 is medium sand with a second laying thickness of 150 mm and a fineness modulus of 2.46.

[0023] The gel material in Step 5 is low-alkali cement, and the cement contains 50% blast furnace slag and has a pH value of 9.

[0024] The modifier in Step 6 is an air-entraining agent, a flocculant and a water-retaining agent.

[0025] In the base 1, a first gravel base 2, a main matrix layer 3, a second gravel base 4, medium sand 5 and soil 6 are laid successively from bottom to top. The first gravel base 2 and the second gravel base 4 improve the porosity, increase the growth space for vegetation roots, and ensure air circulation. The compositions of the first gravel base 2, the main matrix layer 3, the second gravel base 4 and the medium sand 5 are as Figure 2 shown; The overall pH value of the concrete remains between 8 and 9, meeting the growth requirements of plant seeds in the soil. The selected seeds are all vegetation adapted to the low-alkali environment, improving the survival rate of the vegetation.

[0026] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for preparing ecological concrete, characterized in that: The method for preparing ecological concrete comprises the following steps: Step 1: evenly filling the bottom of the base (1) with a first crushed stone base (2); Step 2: Laying a main matrix layer (3) on top of the first crushed stone base (2); Step 3: Laying a second crushed stone base (4) on top of the main matrix layer (3); Step 4: Fill the second crushed stone base (4) with medium sand (5): Step 5: using a gel material to fix the first crushed stone base (2), the main matrix layer (3), the second crushed stone base (4) and the medium sand (5) together; Step 6: spraying modifier; Step 7: Fill the soil (6) on top of the medium sand (5).

2. The method for preparing ecological concrete according to claim 1, characterized in that: The first crushed stone base (2) in step 1 is crushed stone with a thickness of 200 mm and a particle size of 20-25 mm, and mainly plays the role of supporting and draining water.

3. The method for preparing ecological concrete according to claim 1, characterized in that: The main matrix layer (3) in step 2 is a modified ecological concrete test block with a thickness of 600 mm and a size of 150 mm×150 mm×150 mm, which is the main area for purifying water.

4. The method for preparing ecological concrete according to claim 3, characterized in that: The modified ecological concrete test block is made of sandy loam, fly ash and volcanic rock, to which aluminum sulfate and Bacillus subtilis biological agents are added.

5. The method for preparing ecological concrete according to claim 1, characterized in that: The second crushed stone base (4) in step 3 is crushed stone with a thickness of 50 mm and a particle size of 5 to 10 mm.

6. The method for preparing ecological concrete according to claim 1, characterized in that: The medium sand (5) in step 4 is medium sand with a second layer thickness of 150 mm and a fineness modulus of 2.

46.

7. The method for preparing ecological concrete according to claim 1, characterized in that: The gel material in step 5 is low-alkali cement, which contains 50% blast furnace slag and has a pH value of 9.

8. The method for preparing ecological concrete according to claim 1, characterized in that: The modifiers in step 6 are air entraining agent, flocculant and water retaining agent.

9. The method for preparing ecological concrete according to claim 1, characterized in that: The soil (6) in step 7 is filled to a thickness of 100 mm, and the soil is mixed with vegetation seeds, the seeds comprising 30% verbena, 30% Elymus salsa, 20% Lantana camara, 10% tall fescue and 10% lavender.

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