20/30419951 DC
BS EN 17542-3. Earthworks. Geotechnical laboratory tests Part 3. Methylene blue value VBS on soils and rocks
| Označení normy: | 20/30419951 DC |
| Počet stran: | 14 |
| Vydáno: | 2020-07-09 |
| Status: | Draft for Comment |
20/30419951 DC
This standard 20/30419951 DC BS EN 17542-3. Earthworks. Geotechnical laboratory tests is classified in these ICS categories:
- 93.020 Earthworks. Excavations. Foundation construction. Underground works
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.
The VBS test uses common equipment and calibration as the methylene blue test MB for aggregates (EN 933‑9), but the test 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.