BS EN 12697-28:2001 – Bituminous mixtures Ð Test methods for hot mix asphalt Ð
1 Scope
This European Standard describes test methods for preparing test portions for the determination of the binder, water content and grading of samples of bituminous mixtures, when the sample submitted to the laboratory has a mass greater than or equal to four times the test portion.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 58, Sampling bituminous binders.
EN 932-1 , Tests for general properties of aggregates — Part 1: Methods for sampling .
prEN 1 2697-36:1 996, Bituminous mixtures — Test methods for hot mix asphalt — Part 36:Method for the determination of the thickness of a bituminous pavement.
3 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 58 and the following apply.
3.1
representative sample
bulk sample consisting of a specified number of increments purposely taken to represent a specific quantity or area of material
NOTE A representative sample is assumed to have the same composition as the material sampled, within the limits of precision associated with the method of sampling.
3.2
laboratory sample
sample despatched to the laboratory
NOTE It may be the whole or part of the bulk or representative sample and should be of sufficient quantity for all tests required.
3.3
test portion
part of the laboratory sample to be used for a specific test procedure to produce a single test result 3.4
test specimen
part of the test portion on which a single test is carried out
NOTE A number of tests may be necessary to produce a test result.
3.5
test result
result obtained by applying the test procedure to a test portion
NOTE When the test procedure is required to be carried out on more than one test specimen, the test result will be calculated as the mean result of a number of determinations.
4 Apparatus
4.1 Balance
4.2 Ruler
4.3 Circular saw, capable of cutting stone
4.4 Oven, conventional or microwave
4.5 Stopwatch
4.6 Metal tray (optional)
4.7 Sample splitter in accordance with EN 932-1 (such as that shown in Figure 1 ), optional
4.8 Shovel
4.9 Container
5 Preparation of laboratory samples of bituminous mixtures
5.1 Preliminary inspection and storage
5.1.1
On receipt of the laboratory sample inspect it and record its condition.
BS EN 12697-28:2001 – Bituminous mixtures Ð Test methods for hot mix asphalt Ð