For guidance on the terminology for asphalt mixtures refer to PD6691. If risks associated with hand-laying of asphalt with highly modified PMBs are not mitigated, they can lead to problems including failure at joints and surface fretting. If in doubt, seek advice from the material supplier to determine if the material is suitable for hand-lay. Guidance for assessing the skid resistance requirements can be found in CS 228 of the DMRB.
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