Both Polymer and bentonite can be used as the addictive in bored pile foundation 

Bentonite and polymer are not the same, so the use amount cannot be converted. Each has its own advantages and disadvantages in terms of application effects. 

Explanation why amount can not converted

 Due to the different wall protection principles for bentonite and polymer, for bentonite required a high specific gravity: that is, the specific gravity can be adjusted to how many tons of bentonite need to be added to every 100m³ of water. For example, adding 15 tons of bentonite to 100m³ water will give a specific gravity of 1.15, and adding 20 tons of bentonite to 100m³ water will give a specific gravity of 1.2. The amount of bentonite that needs to be added is determined by the specific gravity of the adjustment target. 

The wall protection principle for polymer not specific gravity, but viscosity. The data of the two evaluations are different and cannot be converted.

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