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Pro096

DURABILITY OF QUATERNARY CEMENTS CONTAINING CALCAREOUS FLY ASH, SLAG AND LIMESTONE



Author(s): Durdziński, P. T., Haha, M. B. and Scrivener, K. L.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 434-440
Total Pages: 7
Language: English


Abstract: The durability of blends containing two calcareous fly ashes of different chemical and mineralogical compositions was studied with respect to sulfate and chloride ingress in binary, ternary and quaternary systems (Portland clinker, fly ash, slag, limestone). The results show that durability can change substantially depending on the composition of fly ash and that benefits can be obtained from combining fly ash with slag or limestone.

The differences in durability were compared to phase compositions measured with XRD Rietveld and TGA. The results show that using a calcareous fly ash with around 4 wt.-% C3A does not mitigate expansion under sulfate attack, possibly due to high content of monosulfate. In this case, adding limestone promoted monocarbonate formation instead and significantly decreased the expansion. Chloride ingress can be successfully limited by using calcareous fly ashes or slag or their combinations. Limestone addition can have different effect depending on the system where it is added.


Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00