Afforest additive for vegetation concrete and preparation method thereof

Abstract

The invention provides an afforest additive for vegetation concrete. The afforest additive comprises the following components in percentage by weight: 14-26% of organic matter, 0.6-8% of wood-destroying fungi mycelium, 30-38% of fly ash and 32-40% of plant ash. The afforest additive provided by the invention comprises a certain amount of the organic matter and the wood-destroying fungi mycelium, the production cost is low, the preparation technology is simple, the stability and durability of slope vegetation concrete can be improved, and the sprouting rate and the survival rate of seeds of slope vegetation can also be increased. The invention further provides a preparation method of the afforest additive for vegetation concrete. The preparation method comprises the following steps: preparing an organic additive: adding water of which the proportion is 65-75%a to an organic matrix of which the weight is a, and after storing for 12 hours, performing sterilization to obtain a culture medium; regulating the PH of the culture medium so that the initial PH value is 4; and adding wood-destroying fungi of which the proportion is 0.02-0.06a to the culture medium of which the PH is 4, and performing fermentation in a manner of being away from light for 7-12 days to obtain the organic additive.

Description

technical field [0001] The invention relates to the technical field of vegetation concrete, in particular to a greening additive for vegetation concrete and a preparation method thereof. Background technique [0002] In the construction of highways, railways, water conservancy and other projects, it is often necessary to excavate a large number of slopes. The development of slopes has severely damaged the original vegetation cover, causing desertification, soil erosion, landslides and debris flows and other ecological and environmental problems. With the advancement of modernization, the study of ecological restoration is of great significance for its sustainable development. [0003] The emerging vegetation concrete ecological slope protection technology is an effective means for ecological protection of rocky slopes. The core of the technology is to mix concrete and plant seeds into a spray substrate, and spray the mixture onto the stone slope. This technology utilizes t...

AI Technical Summary

Problems solved by technology

However, this technology has many problems in the process of practical application. The common problems are: (1) use ordinary concrete as the sprayed base material, and the firmness between the sprayed base material and the stone slope is good

However, the addition of ordinary concrete cement causes poor soil structure and is easy to harden. There is no environment suitable for plant growth such as air and water in the sprayed substrate, and it is not conducive to the degradation of organic matter and the formation of a microenvironment for microorganisms.

The main component of cement is CaSiO3CaO-Al2O3, which is strongly alkaline at the beginning of solidification, which can inhibit the germination and growth of plant seeds, and cannot use plants to restore ecology

(2) Using pure soil as the spray base material is suitable for plant growth, but the firmness between the spray base material and the stone slope is limited to a certain extent

The disadvantage of the first generation of products is that the pH value adjustment technology is still unstable, and the main performance is that the pH value will increase with the absorption of calcium superphosphate as the plants grow, resulting in yellowing of the plants in the later stage.

[0006] The second-generation concrete additive is the patent "Preparation Method of Improved Vegetation Concrete Greening Additive" (Patent No.: 201110380711.2) invented by Wei Shuyong in 2011. The core method is to add iron ore powder, calcium powder and phosphate rock powder to the spray mix , silicon ore powder, sulfur powder and other chemical and inorganic substances, the problems produced are the same as those of the first-generation products, and a large number of chemical substances and fertilizers are used, which causes environmental pollution, soil substrate hardening, soil microorganisms drop sharply, production costs rise, and economic benefits decline

It is superior to the first generation of products in that special substances such as air-entraining agents are added to form a loose, porous and hard soil structure, but it uses a large amount of chemical inorganic substances, which causes the soil matrix to harden and harden, and kills Hungry organisms in the soil lead to the formation of a base material that is still a lifeless hardened body, resulting in the defects that large areas of vegetation are yellowed, dead, easy to degrade, and the base layer is easy to be washed off in the later stage

[0007] The third-generation concrete additive is a patent "Preparation method of AB bacteria for vegetation concrete greening additive" (patent number: 201310627756.4) invented by Jin Zhangli, Liu Gaopeng, Xu Wennian, Sun Hongxu and Xu Yang in 2013. The product of peanut shell fermentation is added to the material to promote the growth of microorganisms in the spray material, but it adds a large amount of chemical inorganic substances such as honeycomb cinder to the additive, and requires special treatment of the honeycomb cinder. Not only the process is complicated, but also the same as the first generation The products are the same, leading to serious soil compaction. Various plant hormones such as carboxymethylcellulose CMC, agar powder, polyacrylamide, brassinolide, naphthalene acetic acid, indole acetic acid, sodium binitrophenolate, red Mycin and triacontanol cannot maintain activity in the environment of alkaline honeycomb cinder and concrete. In this method, the substrate suitable for organic bacteria is only honeycomb cinder and peat soil, but when concrete is combined with honeycomb cinder and peat soil It will destroy the growth environment of organic bacteria, thereby destroying the model of improving soil structure by relying solely on organic bacteria; and this method uses a large amount of fertilizers such as superphosphate, compound fertilizer and urea, resulting in high material cost and cannot be widely promoted

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