What is BS EN 12697-35 - Laboratory mixing of bituminous materials about?
BS EN 12697-35 discusses bituminous mixtures. BS EN 12697-35 describes the laboratory mixing of bituminous materials for the manufacture of specimens. BS EN 12697-35 specifies the reference compaction temperatures for mixing based on the grade of the binder for paving grade and hard paving grade bitumen.
Who is BS EN 12697-35 - Laboratory mixing of bituminous materials for?
BS EN 12697-35 on laboratory mixing of bituminous materials is useful for:
- Manufacturers and suppliers of bituminous mixtures
- Construction industry
- Civil engineers and contractors
- Road, pavement, and highway construction companies
- Repair and maintenance companies
- Local authorities
- Testing laboratories
Why should you use BS EN 12697-35 - Laboratory mixing of bituminous materials?
The bituminous mixture is prepared at a target laboratory mixing temperature within a time that is limited in order to reduce mechanical degradation of the aggregates and thermal degradation of the binder.
BS EN 12697-35 is detailed best practices to ensure bituminous mixtures meet the quality and performance requirements that impart structural stability and durability to your construction works.
What is changed since the last update?
BS EN 12697-35:2016 supersedes BS EN 12697-35:2004 which is withdrawn.
BS EN 12697-35:2016 includes some technical changes with respect to BS EN 12697-35:2004. These include:
- Title changed to allow inclusion of asphalt produced at lower temperatures
- Added for the manufacture of samples of asphalt with foamed bitumen
- Introduction of formula for super-heating aggregate when significant proportions of reclaimed asphalt are used
- “Target mixing temperature” extended to “target laboratory mixing temperature” and used throughout the document
- Introduction of the term “Reference compaction temperature”
- Determination of reference compaction temperature in 6.1 extended, including an allowance to reduce it for asphalt mixtures designed to be produced at lower temperatures
- Added requirement for addition of cold reclaimed asphalt to the mixer
