anionic polyacrylamide of Magnafloc 919 can be used for construction bored piling
Magnafloc 919 is a kind of anionic polyacrylamide with ultra molecualr weight mainly used for range of mienral processing.Chinafloc A2520 can replace of it and with good result
Polyacrylamide is commonly used in construction bored piling for its role as a soil conditioning agent. The main application of polyacrylamide in this context is to improve the drilling fluid properties and aid in the excavation process during the construction of bored piles. Bored piles, also known as drilled shafts or caissons, are deep foundation elements constructed by excavating soil or rock to a specified depth and filling the resulting hole with concrete. Here are the key applications of polyacrylamide in construction bored piling:
1. Drilling Fluid Additive:
Polyacrylamide is used as an additive in the drilling fluid used during the excavation of bored piles. The drilling fluid, often referred to as drilling mud, serves several purposes, including stabilizing the borehole, carrying excavated material to the surface, and preventing collapse of the borehole walls.
2. Soil Stabilization:
One of the primary applications of polyacrylamide in bored piling is soil stabilization. Polyacrylamide acts as a flocculant and coagulant, promoting the aggregation of fine particles in the soil. This helps improve the stability of the soil structure, preventing it from collapsing into the borehole during drilling.
3. Viscosity Modification:
Polyacrylamide is effective in modifying the viscosity of the drilling fluid. By adjusting the viscosity, the fluid can better carry and suspend excavated materials, facilitating their removal from the borehole. Controlling viscosity is crucial for maintaining the stability of the drilling process.
4. Reducing Water Loss:
Polyacrylamide helps reduce water loss into the surrounding soil during the drilling process. This is important for maintaining the integrity of the borehole and preventing excessive water ingress, which could lead to instability and difficulties in maintaining the required dimensions of the pile shaft.
5. Improved Hole Cleaning:
The use of polyacrylamide in drilling fluid contributes to improved hole cleaning. It helps suspend and carry the cuttings to the surface, preventing their settlement in the borehole and ensuring a clean and stable environment for pile construction.
6. Minimizing Environmental Impact:
Polyacrylamide formulations used in bored piling are often designed to be environmentally friendly. This is important to minimize the environmental impact of construction activities, especially in areas with stringent regulations regarding soil and water quality.
7. Enhancing Efficiency:
The addition of polyacrylamide to the drilling fluid enhances the efficiency of the bored piling process. It helps create a stable and well-conditioned borehole, allowing for smoother drilling operations and facilitating the subsequent placement of reinforcing cages and concrete.
8. Compatibility with Various Soils:
Polyacrylamide formulations can be tailored to be compatible with a variety of soil types encountered in construction projects. This adaptability makes it a versatile choice for bored piling applications in different geological conditions.
In summary, polyacrylamide plays a crucial role in construction bored piling by serving as a soil conditioning agent in drilling fluids. Its applications include soil stabilization, viscosity modification, reducing water loss, and improving hole cleaning, all contributing to the efficiency and success of the bored piling process.