Preparation method for modified sand body

Abstract

The invention disclose a preparation method for a modified sand body, which comprises the following steps: water-soluble solid state organic substance is dissolved in water to form solution with cohesiveness and adhesion, and the solution is mixed with sand. According to the method, after the water is evaporated, the water-soluble solid state organic substance can bond sand particles, and dissolve in water again to form the solution with the cohesiveness and the adhesion to bond the sand particles; the modified sand body allows a common sand body to be in 'pedogenesis', changes the interaction relation between sand body particles, and forms a particle pore structure with binding force (cohesive force); when the modified sand body is in the use process, the substance is difficult to run off due to the characteristics of the cohesiveness and the adhesion; the sand body is allowed to have same properties of stabilizing and storing moisture and nutrient as the properties of the soil, so as to be able to provide strong conditions for the growing of plants, and be an ideal measure for the governing of deserts; meanwhile, the modified sand body can also be taken as a means to utilize sand resources of a sand beach and a sand to conduct plant planting.

Description

technical field [0001] The invention relates to the fields of utilization of sand resources and control of deserts and desertification, in particular to a method for producing modified sand bodies with soil properties. Background technique [0002] (1) Desert, desertification and its hazards [0003] Deserts and desertification are the most serious major environmental problems facing mankind today. [0004] The land area of ​​the world is 162 million square kilometers, accounting for 30.3% of the total earth area, of which about 1 / 3 (48 million square kilometers) is arid and semi-arid desert areas, and it is expanding at a rate of 40,000 to 60,000 square kilometers every year. . The desert area has accounted for 10% of the total land area, and 43% of the land is facing the threat of desertification. [0005] my country is one of the countries with the most deserts in the world, and it is also one of the countries seriously endangered by sandstorms and desertification. Ac...

AI Technical Summary

Problems solved by technology

However, emulsified asphalt also exists during use because the asphaltene and resin in the asphalt are easily destroyed by oxygen, light, heat, moisture and microorganisms in the atmosphere, and the oil content decreases.

The gradual intensification of this change will lead to the deterioration of asphalt performance, such as the increase of softening point, the decrease of penetration, and the decrease of elongation, so that the united layer gradually becomes brittle, hard, loses plasticity, ages, and eventually cracks and dies. Destroyed by wind erosion, losing sand-fixing effect

[0021] (3) Fundamental difficulties and existing problems in desert and desertification control

However, the sand bodies in the desert are discrete particles, and the fundamental difficulty in desert governance is that the sand bodies in the desert are easy to move, difficult to retain water and store nutrients

Based on the current sand control measures, it is not difficult to find that the existing desert control methods are far from fundamentally solving the two problems of easy movement of the desert and difficulty in water retention and storage of nutrients.

[0023] The existing desert control method is mainly based on sand fixation. Regardless of the engineering (mechanical) measures, plant measures and chemical measures, it does not start from improving the properties of the desert sand body itself, but only avoids the harm caused by the movement of sand. Therefore From the point of view of its methods and methods, it is still a passive sand control, which can overcome the fluidity problem of the desert to a certain extent or in a short period of time, but it is difficult to fundamentally solve the difficult problem of water conservation and storage in the desert, and it is difficult to store nutrients. The hoped "desert into oasis" is still far away

[0024] ①Engineering (mechanical) measures can temporarily change the physical form of desert existence (natural existence mode), which is a temporary sand prevention measure. For the hazards of quicksand, it only plays the role of sand-fixing and "curing the surface", and the desert is temporarily tamed , cannot achieve the effect of "curing the root cause", and after a long time, the desert will still return to its original appearance

[0029] Plant sand fixation uses the upper part of the plant to block and block sand, and uses the root of the plant to fix sand, which can change the microclimate and microsoil environment to a certain extent. However, the fundamental difficulty of plant sand fixation is that the desert itself is not conducive to plant growth, such as the desert is unstable and sandstorms Frequent exercise, barren desert, insufficient water and difficulty in water retention and temperature regulation all have adverse effects on plants

[0030] Wind and sand movement can cause plants to be harmed by blowing erosion, sand burial and sand cutting. The wind and sand movement can be solved by engineering protection measures and chemical sand fixation. However, the fundamental problem of insufficient water in the desert and difficulty in water retention limits the applicability of traditional plant sand fixation. extremely restrictive