What is BS 9434 - Spray applied bitumen system for SAMI about?
Bituminous sprays are an essential component in a number of highway works. Depending on the product and its installation, they provide bonding, sealing, stress dissipation and waterproofing, and extend the life of road pavements, which increases the sustainable use of resources such as aggregates.
BS 9434 is a national standard dealing with the use of bituminous spray stress absorbing membrane interlayers (SAMIs).
Who is BS 9434 - Spray applied bitumen system for SAMI for?
Public and private sector clients in the highways industry along with their contractors and suppliers, including:
- Local authorities
- Government departments
- Test houses
- Consultancies
- Contractors
- Higher education establishments
What does BS 9434 - Spray applied bitumen system for SAMI cover?
BS 9434 specifies requirements for the use of bituminous spray stress absorbing membrane interlayers (SAMIs). There are a range of different materials and techniques available for SAMIs, including asphalt, geosynthetics, and bituminous binders, which can include bitumen emulsion, paving grade, and modified bitumen.
NOTE: In addition to BS 9434:2023, PD 6691 gives guidance on the requirements for asphalt and BS ISO NP TR 18228-10 gives guidance on interlayers with geosynthetics.
Why should you use BS 9434 - Spray applied bitumen system for SAMI?
- BS 9434:2023 is the first full specification on this subject. It standardizes the materials and usages of SAMIs so customers can be clear on what they’re buying and how to use it
- It supports the development of quality assurance procedures/plans to improve consistency between suppliers, providing extra reassurance to customers
- It supports the wider adoption of SAMIs which is advisable because they extend the life of road pavements and increase the sustainable use of natural resources such as aggregates
- BS 9434 will be referenced in National Highways Sector Scheme 13
- It can help users to enter new markets and grow sustainably
- It can help users to accelerate innovation and develop their expertise
- It can help users improve efficiency
- It can help users strengthen risk management
- It can help users increase customer confidence in the use of SAMIs
BS 9434:2023 contributes to UN Sustainable Development Goal 8 on decent work and economic growth, Goal 9 on industry, innovation and infrastructure, Goal 12 on responsible consumption and production, Goal 13 on climate action and Goal 17 on partnership for the goals.
What’s new about BS 9434:2023?
BS 9434:2023 is a new British Standard, introduced to replace Clause 16 in BS 434-2:2006 which has been superseded.
