One method of quantifying moisture in natural bitumen is measuring the weight loss of a sample after drying.
We can use laboratory method for determining the bitumen moisture sensitivity based on D3173 ASTM method.
The analysis sample is that sample which has been pulverized to pass 250-µm.
The shapes of these devices are shown below:
Moisture is determined by establishing the loss in weight of the sample when heated under rigidly controlled conditions of temperature, time and atmosphere, sample weight, and equipment specifications.
%Moisture in analysis sample=[(A-B)/A]×A]×100
A= sample used (grams)
B= sample after heating (grams)