Demulsibility testing

USE Demulsibility testing can be used to help determine the following ... 

The demulsibility test is used to identify or classify a bitumen emulsion as rapid setting (RS) or medium setting (MS) by measuring the amount of bitumen that is broken from the bitumen emulsion. This is obtained by utilising specified amounts and concentrations of calcium chloride solution for anionic bitumen emulsions and dioctyl sodium sulfosuccinate for cationic bitumen emulsions. 

The demulsibility test, carried out in accordance to ASTM D 6936 (2009), is appropriate both for anionic- and for cationic-type RS and MS emulsions. 

Turbine Oils. High-speed machinery, such as steam turbines and dynamos, may cause emulsions with water and hence the ASTM steam emulsion number (D157) and demulsibility test of the Federal government (Method 320.13) are useful. Extreme stability, attained mainly by long filtration through fuller s earth, is necessary because these oils may be used for several years. 

Other emulsion test methods are used to rate the ability of fuel to shed water. These methods include ASTM D-1401 and the Waring Blender Test. The ASTM D-1401 method is a lubricant test method, but has been adopted by the U.S. military for rating diesel fuel demulsibility.This method is summarized by ASTM as follows ... 

The Waring Blender Test is not an ASTM standard, but is commonly used to rate fuel demulsibility. This test method can be summarized as follows ... 

ASTM D 6936. 2009. Standard test method for determining demulsibility of emulsified asphalt. West Conshohocken, PA ASTM International. 

The mass of demulsibility residue (A) in grams divided by the mass of residue in the sample of 100 g of bitumen emulsion and multiplied by 100 expresses the demulsibility percentage. More details of the test method are provided in ASTM D 6936 (2009). 

Refers to the ability of an oil to separate from water, as determined by test method ASTM D 1401 or D 2711. Demulsibility is an important consideration in lubricant maintenance in many circulating lubrication systems. Refer to Demulsifier and Dynamic Demulsibility. 

---