Ready-mixed fluidized solidified soil is a new type of building material, which makes full use of fertilizer troughs, foundation pit excavation or abandoned foundation soil, after mixing a certain proportion of curing agent (mainly calcium oxide CAO, silica SiO2 and alumina Al2O3) and water, through the original process and special machinery for full mixing and uniformity, forming a pumpable, fluidity of the reinforcing material, used in all kinds of fertilizer troughs, foundation pits, room centers, side walls, pipe corridors, special-shaped narrow spaces, The backfill pouring of the pit has a strength of 0 after hardening of the ready-mixed fluidized solidified soil4～10mpa。Admixtures are added according to soil quality and design requirements when mixing. Ready-mixed fluidized solidified soil can adjust its strength and fluidity according to the requirements of use.
Ready-mixed fluidized solidified soil has the advantages of high strength and fluidity suitable for pumping construction, not only the construction speed is fast, but also the quality of the ready-mixed fluidized solidified soil is controllable, the cost is low, the scope of application is wide, and the environment is friendly, which is a very good construction material.
The use of ready-mixed fluidized solidified soil for fertilizer tank backfilling has the following advantages:
1. According to soil conditions, local conditions, and material conditions.
According to the changes of different soil layers, different design requirements, different applicable sites, etc., and then combined with the properties of the nearby soil materials, clay, silty clay, sand silt, etc., are preferred, and the organic matter content is not more than 5%, and the particle size is not more than 50mm. Untreated contaminated soil shall not be used as raw materials for solidified soil. According to the specific strength required by the project, as well as the requirements of specific gravity, freeze-thaw resistance, impermeability, acid and alkali resistance, etc., the ratio of each material of the filling material is adjusted in a targeted manner.
2. Efficient, economical and low-carbon.
A large number of waste soil accumulated around the construction site, reduce the land occupied by waste soil, not only save material costs, but also save transportation costs, avoid secondary treatment, its curing agent can be used as industrial wastes such as grinding slag, slag and fly ash, not only realize the effective utilization of industrial waste, but also reduce the amount of sand, stone, cement and other molding building materials, compared with the direct use of concrete, reduce the use of molding building materials by 30% 65%. It is an efficient, economical, low-carbon and environmentally friendly product, and at the same time realizes the recycling of waste resources, which is of great significance to the sustainable development of society.
3. The construction speed is fast and the safety is high.
According to the current backfill requirements, only 24 hours can reach the intensity of the next step construction, this characteristic can ensure the continuous progress of backfilling, and the working face required for ready-mixed fluidized solidified soil backfill fertilizer tank is small, can be constructed in multiple sections at the same time, and the construction speed is fast, the construction period is short, and the process link is less. Compared with the traditional construction technology, the pouring of ready-mixed fluidized solidified soil effectively prevents workers from working continuously in a small space for a long time, which greatly improves the safety of construction.
4. Strong fluidity and self-tightness.
The fluidity of ready-mixed fluidized solidified soil can fill all the voids in narrow spaces and special-shaped structural spaces. Due to its self-sealing characteristics, there is no need to use large-scale tamping and rolling equipment during construction, which greatly reduces the impact of construction on the structural layer, and will not cause damage to the waterproof layer during the pouring process. At the same time, the ready-mixed fluidized solidified soil adopts the construction method of mechanical ready-mixing, centralized mixing, and on-site pouring, which is flexible in construction and convenient in operation, and can control the input ratio and amount of various materials, so as to adjust the physical properties, stirring time and stirring effect of the filling material, so the finished product of the filler material formed is meticulous and uniform, and the pouring is less affected by the factors of site conditions and construction personnel.
5. Good impermeability.
The curing agent can be composed of a variety of materials, which can fully penetrate and fill in the gap between soil particles, and the components of each component are related and mutually promoted, giving full play to the composite gel effect and filling enhancement effect, so the solidified soil has impermeability. This feature can not only prevent the damage of groundwater to the solidified soil itself, but also closely integrate with the basic structure to prevent surface water from seeping along the interface between the structure and the backfill.
6. Controllable quality, green and environmental protection.
The ready-mixed fluidized solidified soil backfill fertilizer tank can solve the problems of high requirements for soil materials, small working surface and difficult compaction, unstable tamping quality, poor combination with basic structure interface, and dry construction can not guarantee subsidence after encountering water, and the effect of backfilling can achieve the effect of plain concrete, but the cost is much lower than that of concrete backfill. When pouring on site, the material is in a liquid state, which will not produce dust pollution and is green and environmentally friendly.