Zemní práce - Geotechnické laboratorní zkoušky - Část 3: Stanovení hodnoty VBS methylenovou modří na zeminách a horninách (Norma k přímému použití jako ČSN).
NORMA vydána dne 1.9.2022
Designation standards: ČSN EN 17542-3
Classification mark: 721024
Catalog number: 515572
Publication date standards: 1.9.2022
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN
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 adsorbed 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 it 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