Influence of cristalline structure of two minerals clays of type 1/1 on their pozzolanic power

Tchamo Leussa, Claudia Charlotte (2015) Influence of cristalline structure of two minerals clays of type 1/1 on their pozzolanic power. Masters thesis, Université de Yaoundé I.

[img]
Preview
PDF (These de Master)
Available under License Creative Commons Attribution.

Download (1555Kb) | Preview
    [img]
    Preview
    PDF
    Download (1555Kb) | Preview
      [img]
      Preview
      PDF - Submitted Version
      Available under License Creative Commons Attribution.

      Download (1555Kb) | Preview
        [img]
        Preview
        PDF
        Download (1555Kb) | Preview

          Abstract

          Two clayey materials, one provided by a patner in mineral sector and the other coming from Balengou (West Region Cameroon) were subject of a comparative study in order to evaluate the influence of their crystalline structure on their pozzolanic property. These two natural materials were preliminary enriched in clay minerals by wet sieving and the fractions obtained are denoted K and H respectively. K and H were calcinated at 700 °C, with a heating rate of 5 °C/min and 10 hours dwell at the peak temperature, the products obtained were named MK and MH. Samples K, H, MK and MH were physicochemically characterized by the chemical (ICP), thermal(TGA/DTA) and mineralogical (DRX and Spectrometry IR) analyses together with the measurement of specific surface (BET), crystallinity and the pouzzolanicity test. The results confirmed K as a kaolinitic and H halloysic clay. The kaolinite and the halloysite respectively presented in these clayey materials exhibited a poor crystallinity, but the degree of disorder is higher in K than in H. These results were largely affected by the significant fraction of gibbsite in kaolinitic clay K. At the crude state, the pozzolanic activity of the material H is weak compared with that of K, but the heat treatment makes largely improve this property for both samples.

          Item Type: Thesis (Masters)
          Subjects: 600 Technology (Applied sciences) > 620 Engineering and allied operations
          Divisions: Africa > Cameroon > Université de Yaoundé 1 (UY1) > Faculté des Sciences
          Depositing User: Master Claudia Charlotte Tchamo Leussa
          Date Deposited: 08 Feb 2015 16:25
          Last Modified: 08 Feb 2015 16:25
          URI: http://eprints.campuce.org/id/eprint/104

          Actions (login requiered)

          View Item

          Document Downloads

          More statistics for this item...