ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The pozzolanic reactivity of a commercial metakaolin (MK) manufactured in Brazil, wasevaluated in pastes prepared with a type II Portland cement, when used in cement substitutiondegrees from 10 to 40 mass % by thermal analysis techniques. The reactivity during the early stagesof hydration was studied in real time from Non-Conventional Differential Thermal Analysiscurves, normalized by the effect of the specific heats of the raw materials. The total pozzolanicreactivity after 28 days of hydration was evaluated by the calcium hydroxide consumption,calculated from thermogravimetric and derivative thermogravimetric curves of the pastes, obtainedon cement oxide calcined basis. This also allows one to a more accurate determination of theuncombined and total combined water in the pastes than usual procedures. The MK pozzolanicreactivity during the early stages and after a month is proportional to the cement substitution degreein the pastes
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.591-593.827.pdf
Permalink
