With an increased focus on sustainability, BS ISO 22014:2023 provides requirements for the transport, laying and compaction of asphalt mixtures from the manufacturing plant to the eventual road surface.
BS 594987:2024 specifies requirements for the transport, laying and compaction of asphalt mixtures conforming to BS EN 13108-1, BS EN 13108-4, BS EN 13108-5, BS EN 13108-6, and as described in PD 6691, from the time they leave the mixing plant until they are installed ready to receive a superimposed layer or traffic.
It also includes requirements for preliminary work at the laying site needed to verify the substrate is fit to receive the asphalt, and the application of bond coats.
Completeness: BS 594987:2024 gives comprehensive requirements for the transport, laying and compaction of asphalt mixtures from the manufacturing plant to the eventual road surface.
Sustainability and speed: This revision emphasizes warm mix asphalts (as opposed to hot mix) which improves the sustainability of road networks by reducing the amount of energy required to maintain the asphalt mixtures during transport and laying off. This also cools more quickly when compacted on the road surface, allowing for road surfaces to be laid faster, and particularly aiding repairs.
Quality and reliability: It enables users to meet their civil engineering performance requirements in respect of asphalt, producing longer lasting, more sustainable, safer, and more durable road surfaces.
Changes have been made that reflect technological advances since BS 595987:2015+A1:2027 was published including improvements to best practice and sustainability for asphalt mixtures when being transported, laid and compacted. The revision also incorporates methods for measuring the rate of spread of coated chippings, superseding BS 598-1:2011.
The main changes include: