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The core principle of ASTM D4073 is . Unlike chemical methods that measure the carbon content directly through oxidation reactions (like the Walkley-Black method), LOI is a gravimetric procedure.
The test involves clamping a specimen of the material into a ring, exposing one side to water under increasing or controlled pressure, and visually observing when water droplets appear on the dry side. Astm D 4073 Pdf
A standard Universal Testing Machine equipped with an automatic electronic load and strain-recording device. The cross-head must move at a continuous, tightly regulated rate. The core principle of ASTM D4073 is
The standard dictates how many specimens to cut per sample (usually 10) and the required atmospheric conditions (e.g., 65% relative humidity and 21°C / 70°F) for conditioning the material. A standard Universal Testing Machine equipped with an
is the globally recognized standard test method for determining the tensile-tear strength of bituminous roofing membranes . Developed by ASTM International Subcommittee D08.20 on Roofing Membrane Systems , this standard evaluates both laboratory-prepared and field-harvested samples. It serves as a foundational benchmark for engineers, manufacturers, and building inspectors to determine structural performance criteria, measure material aging, and compare the tear resistance of varying commercial roof installations. 1. Overview of ASTM D4073 / D4073M
