What is BS 594987:2024 - Asphalt for roads and other paved areas specification about?
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.
Who is BS 594987:2024 - Asphalt for roads and other paved areas specification for?
- manufacturers;
- highway authorities;
- private infrastructure workers;
- test houses;
- highway and civil engineering consultants.
What does BS 594987:2024 - Asphalt for roads and other paved areas specification cover?
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.
Specifically, BS 594987:2024:
- specifies delivery and rolling temperatures for hot mix and warm mix asphalts;
- provides approximate rates of spread for asphalt mixtures;
- recommends protocols for the product-type testing of asphalt mixtures in accordance with BS EN 13108-20;
- recommends protocols for determining the design binder content of hot rolled asphalt (HRA) surface course mixtures;
- recommends protocols on the calibration procedures for indirect density gauges;
- provides advice on the use of track coats;
- specifies methods for measuring the rate of spread of coated chippings;
- provides guidance on the design of BBA mixtures for airfield pavements;
- specifies requirements for the transport, laying and compaction of mastic asphalt (MA); and
- specifies the method for undertaking an assessment of the compaction performance of a roller.
Why should you use BS 594987:2024 - Asphalt for roads and other paved areas specification?
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.
What's new about the standard?
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:
- the addition of warm mix asphalt;
- new guidance on materials for bridge decks;
- a new annex covering the transport and laying of mastic asphalt;
- a new annex describing the method for the measurement of the rate of spread of coated chippings;
- a new annex describing how to undertake an assessment of the compaction
- performance of a roller.
