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The T30 laboratory test method is used to detect the presence of adhesion agent chemicals in cutback bitumen used as a binder for chip sealing. The use of adhesion agents is mandatory and the colour indicator test is used as a quality control tool to confirm that the agents have been added to the cutback bitumen binder.

The areas covered by the method include:

• materials and apparatus required
• testing procedure
• reporting requirements.

T30 replaces T30: 2024 with minor corrections and amendments.