1. ASTM C1580-09, 2009. Standard test method for water-soluble sulfate in soil. Annual Book of ASTM Standards, American Society of Testing Material.
2. ASTM C265-08, 2008. Standard test method for water-extractable sulfate in hydrated hydrolic cement mortar. Annual Book of ASTM Standards, American Society of Testing Material.
3. ASTM C39, 2002. Standard test method for compressive strength of cylindrical concrete specimens. Annual Book of ASTM Standards, American Society of Testing Material.
4. ASTM D4972-01, 2007. Standard test method for pH of soils. Annual Book of ASTM Standards, American Society of Testing Material.
5. ASTM D4980-89, 2003. Standard test methods for screening of pH in waste. Annual Book of ASTM Standards, American Society of Testing Material.