Impact of calcination temperature on reactivity, maturation capacity and mechanical properties of a high calcium building lime (CL)


Abstract eng:
The impact of the control of key parameters during the production chain (calcination, slaking, maturation) of a lime based binder was experimentally investigated under a range of operating conditions. Furthermore, lime binder’s suitability for interventions was comparatively evaluated through identical mortars’ manufacture procedures and study of their technological and mechanical characteristics. Selected results of this research are presented and discussed in the present paper. The impact of a range of calcination temperatures (900°C, 950°C, 1000°C, 1100°C, 1200°C) to binder reactivity, maturation capacity and mechanical properties were studied and evaluated. Taking into account that the raw material used was a fine-grained, dense, high calcium limestone, it is concluded that temperatures over 1000˚C may give reverse results to binders’ key chemical and physical characteristics (available lime, hydration reactivity, yield, maturation capacity, consistency, water retentiveness, volume stability). Although following production processes (slaking, maturation) provide a range of opportunities for the amelioration of binder properties, calcination temperature remains most influential for their integral performance. These results directly relate to mortar quality and application efficiency which, in turn, ensures optimal structural performance and durability.

Publisher:
Glasgow : University of the West of Scotland, 2013
Conference Title:
Conference Title:
3rd Historic Mortars Conference
Conference Venue:
Glasgow, Scotland (UK)
Conference Dates:
2013-09-11 / 2013-09-14
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2014-11-03, last modified 2014-11-18


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