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2. AASHTO T164. (2011). "Quantitative extraction of asphalt binder from hot mix asphalt (HMA)." American Association of State Highway and Transportation Officials: Washington DC.
3. Amirkhanian A. N. (2012). Properties of functionally graded concrete slabs. Master of Science Thesis University of Illinois at Urbana-Champaign Urbana Illinois.
4. ASTM C29. (2009). "Standard test method for bulk density ("unit weight") and voids in aggregate " ASTM International: West Conshohocken.
5. ASTM C127. (2007). "Standard test method for density relative density (specific gravity) and absorption of coarse aggregate." ASTM International: West Conshohocken.