This appendix includes specifications for hydraulically bound and unbound materials that are options for use in reinstatements drawn from BS EN standards. These materials may be used where listed as an option in this standard. Many of them have technical advantages compared with conventional alternatives, including a modified Type 1F Unbound Mixture (0/20) to mitigate technical risks associated with potential segregation and non-uniform compaction within reinstatements.
The quality control requirements under A10 for HBMs are for production sites that include specific constituent storage, testing and other related quality control procedures, as specified in BS EN 14227. Products that do not comply with all the requirements of A10 may be proposed under A9.