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Unbound/Hydraulically Bound

Unbound and hydraulically bound particle testing standards are published by BS. They cover determination of California bearing ratio, immediate bearing index and linear swelling, determination of the moisture condition value, laboratory reference density and water content, and Cyclic load triaxial test for unbound mixtures.

BS EN 13286-47:2021

Unbound and hydraulically bound mixtures Test method for the determination of California bearing ratio, immediate bearing index and linear swelling (British Standard)

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BS EN 13286-46:2003

Unbound and hydraulically bound mixtures. Test method for the determination of the moisture condition value (British Standard)

This standard specifies the method for the determination of the Moisture Condition Value of mixtures. The standard describes the principle of the test, the apparatus required, the test procedures, and the expression and reporting of the results. The standard is applicable to the testing of laboratory prepared or production mixtures and to mixtures susceptible to crushing during compaction. The tests are appropriate to that part of the mixture up to a maximum particle size of 20 mm.

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BS EN 13286-5:2003

Unbound and hydraulically bound mixtures. Test methods for laboratory reference density and water content. Vibrating table (British Standard)

This European Standard specifies a method for the determination of the maximum dry density of cohesionless materials when compacted using a vibrating table. The method utilizes vibratory compaction to obtain maximum density under saturated condition. Materials for which this method is applicable may contain up to 12% by mass fines (< 0,063 mm). Maximum particle size of the materials to be tested is 80 mm.

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BS EN 13286-7:2004

Unbound and hydraulically bound mixtures. Cyclic load triaxial test for unbound mixtures (British Standard)

This standard specifies two methods for determining the resilient and the permanent behaviour of unbound mixtures under conditions that simulate the physical conditions and stress states of these materials in layers beneath the surface layer of a pavement subjected to moving loads. The two test methods are provided according to the maximum size of particles: - Method A: The Variable Confining Pressure (VCP) method in which the cell pressure is cycled in phase with the axial load. This method applies to unbound mixtures in which all particles pass the 31,5 mm test sieve.

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