THE REACTION MECHANISM OF BLENDED CEMENTS: A 29SI NMR STUDY

29Si NMR has been used as a tool to characterize the reaction mechanism of hydration in several blended cements up to 6 to 9.5 months. The cements investigated were blends with silica fume, fly ash, activated kaolinite and blast furnace slag. In the silica fume and fly ash blended cements a relative increase of Q sup 2 type silicon relative to Q sup 1 type silicon was observed. This effect was most pronounced in the silica fume blends. The details of the study and the results are presented and discussed. It is noted that 29Si NMR will continue to find its major application in the study of synthetic cement systems, containing low levels of paramagnetic iron.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 795-812
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00624334
  • Record Type: Publication
  • Report/Paper Numbers: SP-132
  • Files: TRIS
  • Created Date: Oct 15 1993 12:00AM