BS 13285:2010 pdf download – Unbound mixtures — Specifications
1 Scope
This European Standard specifies requirements for unbound mixtures used for construction and maintenanceof roads, airfields and other trafficked areas. The requirements are defined with appropriate cross-reference toEN 13242.
This European Standard applies to unbound mixtures of natural, artificial and recycled aggregates with aupper sieve size (D) from 8 mm to 90 mm and lower sieve size (d) = 0 at the point of delivery.
NOTE1 Mixtures with an upper sieve size (D) greater than 90 mm are not covered by this European Standard but maybe specified in the place of use.
NOTE2 Water content of the mixture and the density of the installed layer are not specified mixture requirements. Bothparameters are related to the control of the construction of the layer and are outside the scope of this European Standard.
2Normative references
The following referenced documents are indispensable for the application of this document. For datedreferences,only the edition cited applies. For undated references,the latest edition of the referenceddocument (including any amendments) applies.
EN 933-1,Tests for geometrical properties of aggregates — Part 1: Determination of particle sizedistribution -Sieving method
EN 1744-1,Tests for chemical properties of aggregates — Part 1 : Chemical analysis
EN 13242,Aggregates for unbound and hydraulically bound materials for use in civil engineering work androad construction
EN 13286-1,Unbound and hydraulically bound mixtures — Part 1: Test methods for laboratory referencedensity and water content —Introduction, general requirements and sampling
EN 13286-2,Unbound and hydraulically bound mixtures— Part 2:Test methods for the determination of thelaboratory reference density and water content — Proctor compaction
EN 13286-3,Unbound and hydraulically bound mixtures — Part 3: Test methods for laboratory referencedensity and water content —Vibrocompression with controlled parameters
EN 13286-4,Unbound and hydraulically bound mixtures — Part 4: Test methods for laboratory referencedensity and water content— Vibrating hammer
EN 13286-5,Unbound and hydraulically bound mixtures — Part 5: Test methods for laboratory referencedensity and water content— Vibrating table
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.NOTE Other useful terms and definitions are given in EN 13242.
unbound mixture
granular material, normally of a controlled grading with d = 0, which is generally used in pavement bases and sub-bases
NOTE An unbound mixture does not contain an added binder.
level of a property expressed as a range of values or a limiting value
NOTE There is no relationship between the categories of different properties.
particle size distribution expressed as the percentage by mass passing a specified number of sieves
production quantity, delivery quantity, partial delivery quantity (railway wagon-load, lorry-load, ship’s cargo) or stockpile produced at one specific time under conditions that are presumed to be uniform
NOTE With a continuous process the quantity produced during an agreed period is treated as a batch.
4 Requirements
4.1 General requirements
The need for testing for all properties in this clause shall be limited according to the particular application or
end use or origin of the mixture. When required, the tests specified in 4.2 to 4.5 shall be carried out to determine appropriate properties.
NOTE When a test is not required, it should be specified as a “No requirement”.
4.2 Aggregate requirements
When required, the following properties of the aggregates used in the mixture shall be in accordance with EN 13242:
 shape of coarse aggregate;
 percentage of crushed or broken particles and of totally rounded particles in coarse aggregates;
 fines quality;
 resistance to fragmentation of coarse aggregate;
 particle density;
 water absorption;
 resistance to wear of coarse aggregate;
 chemical requirements;
 durability requirements.
4.3 Mixture requirements
4.3.1 Mixture designation
Mixtures shall be selected from Table 1.
4.3.2 Fines content
When required, the percentage of particles which pass the 0,063 mm sieve (fines) determined in accordance with EN 933-1 shall not exceed the values in Table 2, according to the category chosen.