Evaluation of pozzolanic activity of natural and artificial pozzolans by thermal analysis
2004; Elsevier BV; Volume: 420; Issue: 1-2 Linguagem: Inglês
10.1016/j.tca.2003.11.059
ISSN1872-762X
AutoresΑντωνία Μοροπούλου, Asterios Bakolas, Eleni Aggelakopoulou,
Tópico(s)Recycling and utilization of industrial and municipal waste in materials production
ResumoIn this research, the pozzolanic activity of natural and artificial pozzolan used for preparation of restoration mortars was evaluated. For this purpose, several pastes were prepared, by mixing two artificial pozzolans and a natural one with commercial hydrated lime, in different ratios. The pastes were cured in standard conditions (RH = 98%, T = 25 °C). The pozzolanic activity was evaluated by using simultaneous differential thermal and thermogravimetric analysis (DTA/TG) after curing for 3, 7, 14, 28 days. The obtained results revealed that the various lime/pozzolan pastes displayed different reaction kinetics and therefore the various pozzolans present different reactivity, in proportion to its mineralogical, physical and chemical characteristics.
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