1. AASHTO. 1997. AASHTO guide for commonly recognized (core) structural elements. Washington, DC: AASHTO.
2. AASHTO. 2007. AASHTO maintenance manual for roadways and bridges. Washington, DC: AASHTO.
3. AASHTO. 2009. AASHTO transportation glossary. Washington, DC: AASHTO.
4. AASHTO. 2010. AASHTO bridge element inspection guide manual. Washington, DC: AASHTO.
5. ACI (American Concrete Institute). 2013. “Cementitious materials for concrete.” Accessed August 20 2020. https://www.concrete.org/store/productdetail.aspx?ItemID=E313.