PD 6691:2022 PDF Download

PD 6691:2022 provides guidance on how to use the BS EN 13108 standard for bituminous mixtures. Bituminous mixtures, also known as asphalt mixtures, are combinations of aggregates with different gradations, filler types, content, and hardness, along with bitumen of different grades and quantities.

The PD 6691 standard is relevant to manufacturers of bituminous mixtures, construction engineers, quality control personnel, testing authorities, and regulatory authorities. It helps these stakeholders understand the practicality and usefulness of using the BS EN 13108 standard in their respective areas of work.

The reason to use PD 6691 is because BS EN 13108 provides recommendations for the selection of appropriate target gradings and target binder contents, as well as any supplementary performance characteristics, based on best construction practice and national climatic conditions. BS EN 13108 specifies requirements for all the ingredients used in the manufacture of asphalt mixtures, and it provides tables that identify boundaries for the nominated target aggregate gradings, recommended grades of bitumen, and target binder contents.

Therefore, PD 6691 serves as a companion guide to better understand and apply the requirements of BS EN 13108, facilitating effective compaction during laying and ensuring adequate performance of bituminous mixtures under use and trafficking.