ASTM WK67575

    New Test Method for Silica, Precipitated, HydratedElectrical Conductivity

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    Developed by Subcommittee: D11.20 | Committee D11 | Contact Staff Manager


    1. Scope

    This test method is used to determine the electrical conductivity of silica. This test method is suitable for characterizing rubber-grade silicas.


    silica; electrical conductivity


    The electrical conductivity of silica is related to both the adsorbed water and the hydroxyl groups on the surface of the precipitated, hydrated silica. A specific quantity of the sample is boiled in distilled or deionized water. After cooling down to room temperature, the suspension is diluted to 4 % mass per volume (m/V) and its temperature is adjusted to 20 C with a thermostat. The electrical conductivity is measured using a conductivity meter and a conductivity cell.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Jorge Lacayo