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Methylene Blue Test

 

Modified Methylene Blue Test – MMB for short, is an indicator for Clay and other expansive materials in quarried sands and aggregates

Studies have shown that some types of clay in sand can adversely affect concrete quality leading to a variety potential problems in wet concrete as follows:

Shortened open life
Increased Water Demand
Loss of Strength
Poor Rheology

Methylene Blue analysis has been used as an an indicator for potential clay in concrete aggregates for some years and is becoming a more common analysis across the worldwide industry

Grange have recently invested in the latest technology for this type analysis which involves the use of a Colorimeter. This equipment removes any subjectivity in the analysis and provides a indicative result for clay content. It also offers an indication of clay type, particularly if undertaken as a short series of tests to establish trending.

This test known as MMB(Modified Methyline Blue), is recognised by many of the major corporate companies in the concrete industry and Grange are the first to offer it in the Scottish Area on a commercial basis

Because of the equipment used this is a relatively fast test with results possible within an hour of sample receipt

Due to our location immediately adjacent to Junction 17 of the A74M samples can be easily dropped in to our lab for test. You can contact us using the “get in touch button” above if you would like to discuss the test

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