Vialit plate shock test method

The Vialit plate test, according to CEN EN 12272-3 (2003), determines the binder aggregate adhesivity and the influence of adhesion agents or interfacial dopes in adhesion characteristics as an aid to design binder aggregate systems for surface dressing. 

The adhesivity value is determined as the sum of number of chippings remaining bonded to the plate and the number of fallen chippings that are stained by the binder. 

The wetting temperature is determined as the lowest binder temperature used when spreading the chippings on the plate, which results in 90% of the chippings being stained by the binder. 

The fragility temperature is the lowest test temperature at which 90% of the aggregates remain bonded to the plate. 

The test is suitable for all bituminous binders for surface dressings, such as conventional or polymer-modified bitumen, cut-back bitumens, fluxed bitumen or bituminous emulsions with conventional or modified bitumen. 

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Finally, for surface dressings, the Vialit plate shock test method is used (CEN EN 12272-3 2003). 

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