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BS EN 17542-1:2022

BS EN 17542-1:2022

$102.76

Earthworks. Geotechnical laboratory tests – Degradability test standard

Published By Publication Date Number of Pages
BSI 2022 22
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This document defines the principle and the methods for the determination of the “degradability coefficient” of rocky material. The degradability coefficient IDG distinguishes the behaviour of certain rocky material and is used to show the change in the geotechnical characteristics (particle size, clay content, plasticity, etc.) in relation to the characteristics seen immediately following excavation. Changes in the particle size occur due to the combined action of climatic or geohydrological elements (frost, soaking-drying cycles) and mechanical stress to which it is subjected. In the case of degradable rocky material, this leads to a fairly significant and continuous reduction in the mechanical and geometric characteristics of the works in which they are used. The two methods developed in this document for the determination of IDG are not equivalent, so any result obtained by this document can refer to the method used.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
8 5 Method A
5.1 Test principle
5.2 Equipment and test material
5.3 Preparing samples
5.4 Testing
9 5.5 Calculation and expression of results
5.6 Test report
10 6 Method B
6.1 Test principle
6.2 Equipment and test material
11 6.3 Operating procedure
6.3.1 Sample sizes
6.3.1.1 Fine aggregate
6.3.1.2 Coarse aggregate
12 6.3.1.3 Other aggregate
6.3.2 Sample preparation
6.3.2.1 Fine aggregate
6.3.2.2 Coarse aggregate
13 6.3.3 Conduct of the test
6.3.3.1 Immersion of the samples in water
6.3.3.2 Drying the samples after immersion
6.3.4 Quantitative examination
6.3.5 Qualitative examination
14 6.4 Test report
15 Annex A (informative)Example of Test reportDegradability coefficient of rocky material according to EN 178421: Method A
17 Annex B (informative)Example of Test reportDegradability coefficient of rocky material according to EN 178421: Method B
19 Annex C (informative)Alternative size fractions for method A

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BS EN 17542-1:2022
$102.76