AS 1141.1:2015 Methods for sampling and testing aggregates
3.9 One-sized aggregate (single-sized aggregate)
An aggregate of which at least 60% of the mass of the whole material passes a sieve, which is immediately less than the normal size of the aggregate, and is retained on the sieve immediately following the selected sieve in the selected set.
NOTE: The typical sieve set used in Australia include sieves with the following aperture sizes:75.0 mm, 53.0 mm, 37.5 mm, 26.5 mm, 19.0 mm, 13.2 mm, 9.50 mm, 6.70 mm, 4.75 mm,2.36 mm, 0.600 mm and 0.075 mm. This selection of sieves is approximately a quarter series.
3.10 Sample
The material to be forwarded for examination or testing, or both. In most cases, the sample is representative of the parent material and is derived from combining sample increments and then dividing into a suitable amount for examination or testing.
NOTE: Occasionally a sample may represent a contaminant in the parent material or it may be derived from a single increment.
3.11 Sample-increment
For aggregates and sands, the amount of the material taken directly from the conveyor, bin, truck or section of a stockpile or from a placed layer in earthworks or a pavement layer.Where mechanical samplers are used, the amount of material collected in a single pass of the sampler head.
3.14 Test portion
Material derived from a sample, sub-sample or test fraction by further division and/or by screening and used for a particular test.
NOTE: The term ‘sample’, and its derivatives (‘sub-sample’, ‘spot sample’, ‘test sample’ and, in some instances, ‘laboratory sample’) should be used in the AS 1141 series to indicate that there is a continuing representative relationship between the sample and the parent material. However, the term ‘laboratory sample’ is sometimes used to indicate material received at a laboratory where the relationship to the parent material is not stated or is uncertain. In such instances, laboratory reports may refer to results as ‘tested as received’ or use a similar wording which indicates that the relationship of the results to the parent material depends on the interpretations of the authority commissioning the testing. The term ‘fraction’ and its derivatives refer to material that has been altered from the parent material by screening. The fraction should continue to be representative of the same size fraction in the parent material if the sampling procedures of AS 1141.3.1 or AS 1141.3.2 have been followed. There is, however, no certainty that the results from any particular size fraction will apply to any other size fraction of the same parent material. The term ‘test portion’ (or, if used, ‘test material’ or simply ‘material’) are generic terms used in the methods to refer to the material at hand. Test portions may be obtained from samples or fractions with the appropriate relationship to the parent material described above.