Silt solidifier solidifies soil through a series of physical and chemical reactions, transforming it from a soft silt state into a solid material with certain strength and stability. Its main principles and processes are as follows:
1. Physical and chemical reaction mechanism
The curing agent reacts physically and chemically with the soft soil (silt), which is the basis for curing and repair. After adding the curing agent, it will quickly destroy the colloidal properties of the sludge, establish and diffuse capillary channels inside the sludge, promote the outward diffusion and volatilization of water, thereby accelerating the drying process of the sludge.
2. Form a stable structure
- Function of inorganic curing agent: Inorganic materials such as cement and lime react with water and soil particles in the silt to produce calcium silicate hydrate (CSH gel) and other substances. These products are the main source of improving the compressive strength of soil.
- Function of polymer curing agent: Polymer materials such as polyacrylate emulsion, especially super water-absorbing agents, can absorb a large amount of water in the silt, improve the water retention of solidified soil, and significantly improve the engineering properties of the soil.
3. Standard construction process
Dehydration and mixing: In some cases, the sludge is dewatered first. The curing agent is then mixed thoroughly with the sludge to ensure a uniform reaction.
Promote response and maintenance: Curing can be promoted by applying heat or pressure. After mixing, it usually takes 2-3 days of curing time to develop early strength. Sprinkling curing is required in high temperature and dry seasons.
Finally, the solidified soil is compacted by a road roller to further improve its density and strength. Finally, the solidified soil is compacted by a road roller to further improve its density and strength.
Through these principles and steps, sludge solidifier can convert sludge into solid materials with good compressive strength and durability, which not only facilitates transportation and disposal, but also effectively reduces environmental hazards and realizes the resource utilization of waste.