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Landscape planting soil particles as well as preparation method and use method thereof

A landscape and particle technology is applied in the field of landscape planting soil particles and their preparation, which can solve the problems of insufficient soil porosity and poor water retention performance.

Pending Publication Date: 2022-01-18
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, tailings-stationary sedimentation-press filtration (to obtain mud cakes) is often used, and then the mud cakes are ventilated and air-dried to obtain planting soil. However, the porosity of the planting soil obtained by this method is not enough, which leads to its water retention. Poor performance limits its application

Method used

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  • Landscape planting soil particles as well as preparation method and use method thereof
  • Landscape planting soil particles as well as preparation method and use method thereof

Examples

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preparation example Construction

[0027] The invention provides a method for preparing landscape planting soil particles, comprising the following steps:

[0028] Mix tailings, additives and water to obtain tailings mixture;

[0029] Pretreating the tailings mixture to obtain primary planting soil;

[0030] Carbonizing the primary planting soil to obtain the landscape planting soil particles;

[0031] The pretreatment includes pouring-crushing and / or granulation;

[0032] The additives include binders, water reducers, foaming agents and nutrients.

[0033] In the present invention, unless otherwise specified, the raw materials used in the present invention are preferably commercially available products.

[0034] The invention mixes tail mud, additives and water to obtain tail mud mixture.

[0035] In the present invention, the tailings are preferably obtained by washing engineering dregs to remove construction sand. In the present invention, the tailings preferably include more than 95% clay, and the clay...

Embodiment 1

[0057] With 50 parts by weight of tailings (the composition of tailings is 97% clay and 3% impurity, and the composition of described clay is silicon oxide 62%, aluminum oxide 22%, iron oxide 5%, calcium oxide 4%, potassium oxide 4% %), 20 parts by weight of Portland cement, 0.5 parts by weight of polycarboxylate superplasticizer, 1 part by weight of sodium lauryl sulfate foaming agent, 2 parts by weight of vegetation leaves and 10 parts by weight of water are mixed to obtain tailings Mixture;

[0058] The tailing mud mixture is poured to obtain blocks, and then the blocks are crushed to obtain angular planting soil with a diameter ≥ 5 mm, and particles with a diameter of less than 0.5 mm are reused in the tail mud.

[0059] The obtained angular planting soil is carbonized to obtain landscape planting soil particles; the carbonization temperature is 25° C., the pressure is normal pressure, the carbonization humidity is 60%, the carbonization carbon dioxide concentration is ≥ 9...

Embodiment 2

[0061] With 50 parts by weight of tailings (the composition of tailings is 97% clay and 3% impurity, and the composition of described clay is silicon oxide 62%, aluminum oxide 22%, iron oxide 5%, calcium oxide 4%, potassium oxide 4% %), 20 parts by weight of Portland cement, 0.5 parts by weight of polycarboxylate superplasticizer, 1 part by weight of animal hoof horn type protein active material foaming agent, 2 parts by weight of vegetation fallen leaves and 10 parts by weight of water are mixed to obtain tail mud mixture;

[0062] The tailings mixture is granulated to obtain spherical planting soil with a diameter ≥ 5 mm, and the particles with a diameter of less than 0.5 mm are reused in the tailings.

[0063] The obtained spherical angle planting soil is carbonized to obtain landscape planting soil particles; the carbonization temperature is 25° C., the pressure is normal pressure, the carbonization humidity is 60%, the carbonization carbon dioxide concentration is ≥ 95%, ...

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Abstract

The invention relates to the field of landscape planting soil particles, in particular to landscape planting soil particles as well as a preparation method and a use method thereof. The preparation method of the landscape planting soil particles comprises the following steps: mixing tail mud, additives and water to obtain a tail mud mixture; pretreating the tail mud mixture, and obtaining primary planting soil; and carbonizing the primary planting soil to obtain landscape planting soil particles. The pretreatment comprises pouring-crushing and / or granulation. The additives comprise an adhesive, a water reducing agent, a foaming agent and a nutritional agent. The porosity of the landscape planting soil prepared by the preparation method can reach 30%-70%, the bulk density can reach 300-1200 kg / m < 3 >, and the water retention rate is 50%-85%.

Description

technical field [0001] The invention relates to the technical field of landscape planting soil, in particular to a landscape planting soil particle, a preparation method and a use method thereof. Background technique [0002] In recent years, during the rapid development of urbanization in my country, urban underground engineering construction (such as subways, underground space structures) and excavation of foundation pits (such as high-rise buildings) will produce a large amount of engineering slag. Most of engineering residues are low-hazard natural substances, such as gravel and clay minerals. Among them, the gravel can be used as construction sand after washing, but the tailings after sand washing have no good uses at present, and are mainly transported to remote areas for stacking, and the utilization rate is not high, resulting in waste. [0003] The main component of tailings is clay, which is an important material component of planting soil. Therefore, in the prio...

Claims

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Application Information

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IPC IPC(8): A01G24/10A01G24/30A01G24/22A01G24/20A01G24/12A01G24/00
CPCA01G24/10A01G24/30A01G24/22A01G24/20A01G24/12A01G24/00
Inventor 王琰帅董必钦邢锋洪舒贤房国豪张媛媛
Owner SHENZHEN UNIV
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