A series of European standards—designated EN 13108 and containing requirements for the design, testing, and production of asphalt mixtures—has been implemented in all member states of the European Committee for Standardization (CEN). It consists of 10 standards:
EN 13108-1:2006, Bituminous Mixtures— Asphalt Concrete
EN 13108-2:2006, Bituminous Mixtures— Asphalt Concrete for Very Thin Layers EN 13108-3:2006, Bituminous Mixtures — Soft Asphalt
EN 13108-4:2006, Bituminous Mixtures — Hot Rolled Asphalt
EN 13108-5:2006, Bituminous Mixtures — Stone Mastic Asphalt EN 13108-6:2006, Bituminous Mixtures — Mastic Asphalt
EN 13108-7:2006, Bituminous Mixtures — Porous Asphalt
EN 13108-8:2005, Bituminous Mixtures — Reclaimed Asphalt
EN 13108-20:2006, Bituminous Mixtures — Type Testing
EN 13108-21:2006, Bituminous Mixtures — Factory Production Control
The standards numbered from 1 to 7 are intended for constructing products harmonized with the Construction Product Directive No. 89/106, which is a classification type of standard. This type of standard does not include ready-to-meet sets of requirements, but only a list of properties with a set of categories-levels of requirements. Basically, they are universal standards to be adopted by any CEN-member state.
It is impossible to establish the same requirements for all of Europe due to its substantial climatic differences and diversified road technology experiences. As a result, the common standard has to reflect these differences. The crucial point is that all countries use the same category symbols for SMA properties and the same testing methods for those mixtures. Owing to this classification standard, each country may individually specify its essential requirements for asphalt mixtures by placing them
in a national application document (NAD). The NAD is understood to be a document introducing an EN standard in national technical regulations, containing a combination of properties and levels of requirements suitable for a given country. An NAD may appear in one of the following form of:
• Technical guidelines (e. g., British PD 6691)
• A national standard that does not contradict the EN standard (e. g., Austrian standard ONORM B 3584:2006)
• A National Annex to a national standard implementing the EN standard (e. g., Slovenian Standard SIST 13108-5)
Apart from the standards concerning separate asphalt mixtures (numbered from 1 to 7), the system contains three additional standards (numbered 8, 20, and 21). The standard EN 13108-8 applies to reclaimed asphalt (RAP), therefore it does not refer to a construction product directive. The standard EN 13108-20, entitled Type Testing, concerns the required range of tests necessary for marking a mixture with the CE symbol (for so-called conformity assessment). The last standard, EN 13108-21 Factory Production Control, includes the description of requirements for asphalt plants and quality control. All parts form a complete system of requirements for design, testing, production, and the conformity assessment of asphalt mixtures.
The standard EN 13108-5, which describes the classification system of requirements for SMA mixtures, will be further discussed. Subsequently, the clauses of EN 13108-20 concerning SMA mixtures will be outlined. The present chapter concludes with a description of factory production control according to the standard EN 13108-21.
Any reader interested in details of the presented standards should look at the original texts and clauses.
