How Much Polymer or Bentonite Do I Need for a Bored Pile? Slurry Volume Calculator
Use geometry to calculate theoretical excavation volume, then apply the approved project dosage. A calculator can calculate quantity; it cannot select the correct dosage.
Cylindrical pile volume
V = πD²L / 4 = 0.7854 × D² × L, with D and L in metres.
Diameter in millimetres
V (m³) = 0.0000007854 × D(mm)² × L(m).
Multiple diameters
For stepped shafts or rock sockets, calculate each cylinder separately and sum them. Do not average diameters because volume is proportional to D².
Product quantity
ALKABEN kg = slurry m³ × approved kg/m³. POLYWELL kg = slurry m³ × approved kg/m³. DRILL-WELL L = slurry m³ × approved L/m³.
Project demand
Theoretical bore volume is not total project consumption. Add surface-system inventory, reserve and expected losses separately, avoiding double-counting.
Consumption ratio
Fresh slurry prepared ÷ theoretical excavation volume is a useful project KPI for comparing support-fluid efficiency.
Calculate from the qualified treatment rate
Use the selected product treatment from trial/project procedure; do not let the calculator invent it.
Slurry Volume & Product Quantity Calculator
Use a dosage already qualified for the project. The calculator does not determine the correct chemical concentration.