Synthesis and hydration study of Portland cement components prepared by the organic steric entrapment method

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Abstract

The four components of Portland cement; dicalcium silicate (Ca 2SiO4), tricalcium silicate (Ca3SiO 5), tricalcium aluminate (Ca3Al2O6), and tetracalcium aluminate iron oxide (Ca4Al2Fe 3O10), were made by the PVA complexation process. Powders prepared by this new method can make relatively high yields of pure, synthetic, cement components of nano or sub-micron crystallite dimensions, high specific surface area, and extremely high reactivity at relatively low calcining temperatures, in comparison with conventional methods. The above advantages can enhance setting speed, increase strength, and lead to other desirable characteristics of Portland cement. Optimum synthesis conditions, such as PVA content, degree of polymerization of the PVA, and calcination temperature, were determined for each component. Hydration speed and strength of the synthesized, mixed cement paste were also studied at room temperature (25°C). The powders and hydration behavior were characterized by microstructural examination (XRD, SEM) and specific surface areas were measured by nitrogen gas adsorption BET. DSC and Instron were used to study setting speed and compression strength.

Original languageEnglish (US)
Pages (from-to)87-92
Number of pages6
JournalMaterials and Structures/Materiaux et Constructions
Volume38
Issue number275
DOIs
StatePublished - Jan 1 2005

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials

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