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BS EN 17542-3:2022

BS EN 17542-3:2022

$102.76

Earthworks. Geotechnical laboratory tests – Methylene blue value VBS on soils and rocks

Published By Publication Date Number of Pages
BSI 2022 18
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This document describes the reference method for the determination of the methylene blue value (VBS) in soils and rocks for earthworks. The test is based on measuring the quantity of methylene blue that can be adsorbed by the material suspended in water. This quantity of absorbed methylene blue is reported by direct proportionality to the 0/50 mm ground. The soil blue value is directly related to the specific surface area of the soil particles or rocky material. NOTE The VBS test uses common equipment and calibration as the methylene blue test MB for aggregates (EN 933 9), but the test is applies to another granular fraction (5 mm for VBS and 2 mm for MB, respectively). Thus, the results obtained between the two tests cannot be compared in the general case.

PDF Catalog

PDF Pages PDF Title
2 National foreword
5 European foreword
6 Introduction
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Principle of the test
5 Apparatus
5.12 Spatula.
9 5.13 Desiccator.
6 Reagents
6.1 Dye solution
6.2 Preparation of 10 g/l methylene blue solution
10 7 Preparation of the test portions
7.1 If Dmax is greater than 50 mm
7.2 If Dmax is ranging between 5 mm and 50 mm.
7.3 Washing procedure for materials > 5 mm
7.3.1 Materials concerned
7.3.2 Step 1 – Brushing
7.3.3 Step 2 – Washing
11 7.4 If Dmax is smaller or equal at 5 mm.
8 Procedure
8.1 Description of the stain test
8.2 Preparation of suspension
12 8.3 Determination of the quantity of dye adsorbed
9 Calculation and expression of results
13 10 Test report
14 Annex A (informative) Example of a test data sheet
15 Annex B (informative) Alternative size fraction
16 Bibliography

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BS EN 17542-3:2022
$102.76