Public test guide

Riedel and Weber binder adhesion

Assesses how strongly bituminous binder remains attached to aggregate in the presence of water.

Plain-language explanation

What the test tells you.

The project specification controls the exact method and acceptance requirement.

Binder-coated aggregate is exposed progressively to specified solutions and visually assessed for stripping.

Prepared aggregate, binder, controlled heating/mixing tools, specified solutions and visual rating criteria.

An adhesion or stripping classification under the method conditions.

Supports aggregate-binder compatibility assessment and identification of moisture-damage risk.

Typical test sequence

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