Rujukan Simen_Portland

  1. ↑ Chris Boyd (December 2001). "Recovery of Wastes in Cement Kilns" (PDF). World Business Council for Sustainable Development. Diarkibkan daripada asal (PDF) pada 2008-06-24. Dicapai 2008-09-25. 
  2. ↑ S.H. Kosmatka; W.C. Panarese (1988). Design and Control of Concrete Mixtures. Skokie, Illinois: Portland Cement Association. m/s. 15. ISBN 0-89312-087-1. As a generalization, probably 50% of all industrial byproducts have potential as raw materials for the manufacture of Portland cement. 
  3. ↑ Courland, Robert (2011). Concrete planet : the strange and fascinating story of the world's most common man-made material. Amherst, N.Y.: Prometheus Books. ISBN 978-1616144814. Dicapai 28 August 2015. 
  4. ↑ Gillberg, B. Fagerlund, G. Jönsson, Å. Tillman, A-M. (1999). Betong och miljö [Concrete and environment] (dalam bahasa Swedish). Stockholm: AB Svensk Byggtjenst. ISBN 91-7332-906-1. Selenggaraan CS1: Pelbagai nama: senarai pengarang (link) Selenggaraan CS1: Bahasa yang tidak dikenali (link)
  5. ↑ "ASTM C185-15a, Standard Test Method for Air Content of Hydraulic Cement Mortar". www.ASTM.org. West Conshohocken, PA: ASTM International. 2015. doi:10.1520/C0185-15A. Dicapai 16 May 2017. 
  6. ↑ "125 Years of Research for Quality and Progress". German Cement Works' Association. Archived from the original on 16 January 2015. Dicapai 30 September 2012. Selenggaraan CS1: BOT: Status original-url tidak diketahui (link)
  7. ↑ Dylan Moore. "Cement Kilns: Clinker Thermochemistry". cementkilns.co.uk. 
  8. ↑ "Portland Cement". dot.gov.