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A new technique of activation of cement kiln dust (CKD) - fly ash systems



Title: A new technique of activation of cement kiln dust (CKD) - fly ash systems
Author(s): K. Bui
Paper category : conference
Book title: RILEM International Symposium on Environment-Conscious Materials and Systems for Sustainable Development
Editor(s): N. Kashino and Y. Ohama
Print-ISBN: 2-912143-55-1
e-ISBN: 2912143640
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 93 - 102
Total Pages: 10
Nb references: 7
Language: English


Abstract: Binary blends containing cement kiln dust (CKD) and fly ash class F were used to develop secondary cementitious binders through a new approach of mechanochemical treatment. The function of high energy milling fly ash in a vibratory mill, as an intermediate step before inter-grinding with CKD was found to be a more efficient regime in the activation of the CKD-fly ash systems. XRD test results revealed that interground mixtures containing separately ground fly ash resulted in a reduction of the peak areas of the mixture and an increased induced amor-phization. Properties including, rate of heat evolution, setting time, and compressive strength of the mixtures significantly improved. In addition, for equivalent total grinding times, sepa-rate grinding of fly ash resulted in a finer particle size distribution of the CKD-fly ash mix-tures.


Online publication: 2004-11-24
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143640.011