Effect of Large Amounts of Natural Pozzolan Addition on Properties of Blended Cements

This article reports on a study of the effect of large amounts of natural pozzolan addition on properties of blended cements. Blended cements with 450 m2/kg Blaine fineness were produced from a Turkish volcanic tuff in a laboratory mill by intergrinding Portland cement clinker, natural pozzolan, and gypsum. The effects of 35, 45, and 55 wt.% natural pozzolan addition on the properties of these blended cement pastes and mortars were investigated. The cements were tested for particle size distribution, setting time, heat of hydration, compressive strength, alkali-silica activity, and sulfate resistance. The results showed that the compressive strength of the mortars made with blended cements containing large amounts of natural pozzolan was lower than that of the Portland cement at all tested ages up to 90 days. Especially, the early strength of blended cements decrease significantly as a result of the combined effects of low Portland cement content and relatively high water-to-cement ratio. Blended cements containing large amounts of pozzolan showed excellent performance for suppressing the expansions caused by alkali-silica reaction.

  • Availability:
  • Authors:
    • Turanli, L
    • Uzal, B
    • Bektas, F
  • Publication Date: 2005-6

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01003033
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 3 2005 9:33AM