This report is divided into two parts: Portland and Sorel Cements. Portland Cement: The production of doped belite (dicalcium silicate) clinkers can be a prospective way of saving energy in cement production. Barium sulfate (BaSO sub-4), calcium tribasic phosphate (Ca sub-5 (PO sub-4) sub-3 (OH), and vanadium oxide (V sub-2 0 sub-5) stabilize Beta-, alpha' and alpha modifications of belite (C sub-2 S). The aplha' modification shows better strength development than the Beta-C sub-2 S. Strength develops more slowly in Ca sub-5 (PO sub-4) sub-3 OH than in BaSO sub-4, stabilized belites. Also, belite clinkers doped with BaSO sub-4 attain greater strength than belites without BaSO sub-4. Sorel Cement: The reaction products are dependent on the proportion of reactants (MgO, MgC1 sub-2, and H sub-2 O) and on MgO activity. Hardened cements achieve the best strength development and stability when phase 5 (5Mg (OH) sub-2 .MgC1 sub-2 .(H sub-2 O) is the main reaction product. Phosphate addition, especially soluble phosphates, which are more effective, improves the cement's resistance to the effects of water. (FHWA)

  • Corporate Authors:

    Institut "Rudjer Boskovic"

    Zagreb, Croatia,   Yugoslavia 

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Matkovic, B
  • Publication Date: 1981-4

Media Info

  • Pagination: 144 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00341492
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-80-128 Intrm Rpt
  • Contract Numbers: Agree. No. 4 (PI480)
  • Files: TRIS, USDOT
  • Created Date: Dec 22 1981 12:00AM