Hydraulically Bound Mixtures (HBM) are materials which set and harden by hydraulic reaction.

Trenchmod® material re-uses the actual material excavated on site and modifies the mechanical behaviour of this by the addition of carefully controlled amounts of other materials in a patented on or off-site mixing process to produce consistent high quality materials for use back on the site. This type of HBM is inherently more efficient and cost effective and is significantly more sustainable both economically and environmentally.

WRAP R&D Report: Aggregates

 

European Patent No: EP1303365
British Patent No: GB2379894

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