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TMF production

TMFs must be prepared in accordance with an agreed process or with the procedures set out in the approval trial agreement (see A9.5), and to the approved mix formulation(s) derived from development and testing.
TMFs can be prepared on site or delivered to site as a ready-mixed fill material. However, subject to results of development testing, the TMF mix may be transported by agreement with the authority,.
Mixing can be carried out using any equipment suitable for the manufacture of TMFs in the required quantities, provided that the approved mixing procedure is used throughout. Mixing equipment must be maintained in accordance with the manufacturer’s recommendations and checked regularly. All metering or weighing apparatus must be calibrated regularly according to a Quality Assurance Scheme.
All binders, additives and admixtures, including diluted solutions must be stored according to the manufacturer’s recommendations and used within the recommended shelf life.
TMFs must be compacted in accordance with the manufacturer’s recommendations or an agreed compaction regime obtained by prior development and testing.