GB/T 26930.11-2014 Carbonaceous materials used in the production of aluminium.Pitch for electrodes.Part 11:Determination of dynamic viscosity (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 26930.11-2014
Scope
This part of GB/T 26930 specifies two methods for determining the dynamic viscosity of coal tar pitch used in the production of primary aluminum. For bitumen that conforms to Newtonian fluid properties, these two determination methods are equally valid, and either method can also be used to express it. Method A (ball displacement method) is applicable to asphalt that conforms to Newtonian fluid properties, such as the determination of the softening point of asphalt without adding other materials, at a temperature higher than the softening point but lower than 180 °C. Measuring range: 102 mPa·s~104 mPa·s. Method B (cylindrical rotation method) is suitable for the determination of asphalt that conforms to Newtonian fluid properties, and is also suitable for the determination of asphalt that does not conform to Newtonian fluid properties. They are either processed at high temperature (mesophase exists) or need to be measured at higher temperature (above 180 °C). This method can tell whether asphalt conforms to Newtonian fluid behavior. Measuring range: ≤3×106 mPa·s.
GB/T 26930.11-2014 Referenced Document
GB/T 26297.5-2010 Sampling of carbonaceous materials used for aluminium production.Part 5:Pitch for electrodes
ISO 6388 Surface active agents; determination of flow properties using a rotational viscometer
GB/T 26930.11-2014 history
2014GB/T 26930.11-2014 Carbonaceous materials used in the production of aluminium.Pitch for electrodes.Part 11:Determination of dynamic viscosity