BS EN 13285:2010 Unbound mixtures

BS EN 13285:2010 pdf download.Unbound mixtures – Specifications.
BS EN 13285 specifies requirements for unbound mixtures used for construction and maintenance of roads, airfields and other trafficked areas. The requirements are defined with appropriate cross-reference to
EN 13242.
This European Standard applies to unbound mixtures of natural, artificial and recycled aggregates with a upper sieve size (D) from 8 mm to 90 mm and lower sieve size (d) = 0 at the point of delivery.
NOTE 1 Mixtures with an upper sieve size (0) greater than 90 mm are not covered by this European Standard but may be specified in the place of use.
NOTE 2 Water content of the mixture and the density of the installed layer are not specified mixture requirements. Both parameters are related to the control of the construction of the layer and are outside the scope of this European Standard.
2 Normative references
The following referenced documents are Indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 933-1, Tests for geometrical properties of aggregates — Part 1: Determination of particle size distnbution — 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 and road construction
EN 13286-1. Unbound and hydraulically bound mixtures — Part 1: Test methods for laboratoiy reference density and water content — Introduction, general requirements and sampling
EN 13286-2, Unbound and hydraulically bound mixtures — Part 2: Test methods for the determination of the laboratory reference density and water content — Proctor compaction
EN 13286-3, Unbound and hydraulically bound mixtures — Part 3: Test methods for laboratory reference density and water content — Vibrocompression with controlled parameters
EN 13286-4, Unbound and hydraulically bound mixtures — Part 4: Test methods far laboratory reference density and water content — Vibrating hammer
EN 13286-5, Unbound and hydraulically bound mixtures — Part 5: Test methods for laboratory reference density and water content — Vibrating table
3 Terms 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.
3.1 unbound mixture
granular material, normally of a controlled grading with d = 0, which is generally used in pavement bases and sub-bases
3.2 category
level of a property expressed as a range of values or a limiting value
NOTE There is no relationship between the categories of dfferent properties.
3.3 grading
particle size distribution expressed as the percentage by mass passing a specified number of sieves
3.4 batch
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 fllowing 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;
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.
When required, the percentage of particles passing the 0,063 mm sieve shall also be greater than the values given in Table 3, according to the category chosen.
The categories in Table 2 and Table 3 shall be chosen so that the difference between the maximum fines content and the minimum fines content is not less than 3 %.
4.3.3 Oversize
When determined in accordance with EN 933-1, the percentage of particles passing the upper (D) sieve shall lie within the ranges given in Table 4 according to the category chosen.
4.4 Grading requirements
4.4.1 General grading curve
When required, the percentage by mass passing sieve A, sieve B, sieve C, sieve E and where specified in Table 6 sieve F and sieve G determined in accordance with EN 933-1 using the sieves defined in Table 5 shall be within the overall grading range appropriate to the category selected from Table 6.
4.4.2 Grading of individual batches
When required in addition to conforming to the overall grading range given in Table 6, the grading of at least 90 % of batches assessed over a maximum period of six months within a system of factory production control shall conform to the following requirements, to ensure that production is consistent and that the mixture has a continuous grading
a) the percentage by mass passing each sieve shall have a value which conforms to the appropriate tolerances given in Table 7, when compared with the relevant supplier declared value.
b) the calculated difference between the values of percentage by mass passing selected sieves shall conform to the appropriate range given in Table 8.
4.5 Other requirements
Under certain conditions frost susceptibility, permeability and leaching shall be considered.
NOTE 1 There is currently insufficient experience to define test methods and set specification limits which can be used in all parts of Europe. The test method may be a direct frost heave, permeability or an indirect method. The requirements may be given in regulations in the place of use.
5 Evaluation of conformity
5.1 Sampling
Bulk (initial) samples of unbound mixtures shall be taken and reduced in accordance with EN 13286-1.
5.2 Factory production control
The producer shall have in place a system of factory production control that complies with the requirements of
Annex C.
5.3 Declaration of laboratory dry density and optimal water content
As part of the system of factory production control a typical value of laboratory dry density and optimum water content shall be determined. The fines content of the sample used for the test shall also be reported.
The test methods used to determine laboratory dry density and optimum water content shall be selected from the methods listed below:
一 Proctor compaction in accordance with EN 13286-2,
一 vibrocompression with controlled parameters in accordance with EN 13286-3,
一 vibrating hammer in accordance with EN 13286-4,
一 vibrating table in accordance with EN 13286-5.
For categories GA, Gg, Gc, Go and Gp in Table 6 which are defined using supplier declared values the sample used for the test shall have a grading within +5 % of the supplier declared value for each sieve.
5.4 Declaration of water soluble sulphate content
When required, as part of the system of factory production control the water soluble sulphate content of the mixture shall be determined using the test method set out in EN 1744-1.BS EN 13285 pdf download.BS EN 13285:2010 Unbound mixtures