Some ageing characteristics of lime

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Journal titleJournal of Applied Chemistry
Pages198202; # of pages: 5
Subjectlime; hydrated cement; adsorption; mechanical properties; Concrete; oxyde de calcium; ciment hydrate; adsorption; propriete mecanique
AbstractThis study involves the special case of lime compacts which are considered to serve as models for the system of lime in hydrated Portland cement paste. The ageing of lime was studied by measuring length changes of powdered samples under various steady-state and alternating conditions of humidity. As an explanation for the unique behaviour of lime compacts, a primary mechanism is proposed based on the theory that recrystallisation occurs at least at areas of particle contact when lime compacts are exposed to humidities above a certain value. Furthermore, this recrystallised product is more accommodating than the parent material, and hence it can be consolidated by forces due to menisci or changes in surface free-energy. This action is manifested by irreversible shrinkage on storage at intermediate humidities, by drying after storage or by alternating between two levels of humidity.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number9794
NPARC number20373998
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Record identifier52793b36-a180-4d91-96a9-295997a87be2
Record created2012-07-23
Record modified2016-05-09
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