BS EN 13286-53:2004 – Unbound and hydraulically bound mixtures — Part 53: Methods for the manufacture of test specimens of hydraulically bound mixtures using axial compression

1 Scope
This document specifies a test method for making cylindrical specimens of hydraulically bound mixtures to a predetermined density and moisture content by axial compression. This document applies to mixtures, or that part of a mixture, containing aggregate up to a maximum size of 22,4 mm, and for mixtures that have sufficient fines or cohesion to allow extrusion without damage immediately after compaction.
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 933-2, Tests for geometrical properties of aggregates — Part 2: Determination of particle size distribution — Test sieves, nominal size of apertures
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
compaction by axial compression
method of manufacture of a laboratory test specimen by compacting a predetermined quantity of mixture into a cylindrical mould of known volume using axial pressure applied through pistons or plugs at both ends of the mould
3.2
slenderness ratio
height to diameter ratio of the specimen
4 Symbols
For the purposes of this document, the following symbols apply.
d specimen diameter, in millimetres (mm);
h specimen height, in millimetres (mm);
e displacement depth of collar, in millimetres (mm);
m mass of the specimen, in grams (g);
V volume of the specimen, in cubic millimetres (mm 3 );
ρd dry density of the specimen, in megagrams per cubic metre (Mg/m 3 );
w water content of the mixture expressed as a percentage by dry mass (%).
5 Principle
Cylindrical test specimens of the mixture are made by axial compression. After demoulding, the specimens are stored at a specified temperature and for a specified period of time minimizing loss of moisture until required for testing.
NOTE The method described usually produces specimens with a density gradient such that the density in the central part of the specimen is less than that at the ends.
6 Dimensions of the specimens
Specimens shall conform to the dimensions given in Table 1 .
BS EN 13286-53:2004 – Unbound and hydraulically bound mixtures — Part 53: Methods for the manufacture of test specimens of hydraulically bound mixtures using axial compression