Added Filler (Silt) : Mineral matter, suitable for use in asphalt - at least 75% of which is finer than 75 mm and all of which is finer that 600 mm - which is added to the combined aggregate of an asphalt mix
Peter Milne and Kieran Sharp, ARRB Group, and Bob Ungers, consultant, Austroads Glossary of Terms (4th Ed.), Austroads Ltd., Sydney, NSW, Australia 2010. http://www.bicyclensw.org.au/files/u1/Austroads_Gl ossary_of_Terms_4th_edition.pdf (Road Trfc and Transp Sfty - Brit) {529}