What is BS EN 933-9 - Methylene blue test on fine aggregates about?
BS EN 933 is a European Standard on tests for geometrical properties of aggregates. The main aim of the BS EN 933 series is to provide best industry guidance to ensure construction materials contribute to the structural integrity of civil engineering works.
BS EN 933-9 is the ninth part of the BS EN 933 series that describes the reference method used for type testing and in cases of dispute for the determination of the methylene blue value of the 0/2 mm fraction in fine aggregates or all-in aggregates (MB).
BS EN 933-9 also describes the reference method for the determination of the methylene blue value of the 0/0,125 mm fraction (MBF) in Annex A.
For other purposes, in particular factory production control, other methods may be used provided that an appropriate working relationship with the suitable reference method has been established.
Who is BS EN 933-9 - Methylene blue test on fine aggregates for?
BS EN 933-9 on methylene blue test on fine aggregates for:
- Construction materials manufacturers and suppliers
- Construction industry
- Civil engineers
- Contractors
- Cement production companies
- Quality control and testing authorities
Why should you use BS EN 933-9 - Methylene blue test on fine aggregates?
The methylene blue value is a well-established measure for determining the presence of minerals in aggregates and whether they are active or detrimental. It involves reacting aggregates fines with a blue dye and measuring dye uptake, as a colour change, to estimate a rapid and accurate quality-control tool to determine the variability of aggregate contamination.
In this regard, BS EN 933-9 provides the requirements for apparatus, reagents, test preparation and test procedure to evaluate the methylene blue value in fine aggregates.
As a result, if you are a manufacturer of aggregates, conforming to BS EN 933-9 can demonstrate the performance and credibility of your products.
Overall, aggregate contamination can be an important predictor of concrete performance and thus BS EN 933-9 test methods provides both aggregate and concrete producers with the flexibility to increase fines utilization.
Adopting the methylene blue test on fine aggregates can also pose as an effective quality control measure.
