Strength development in magnesium oxychloride and other cements

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Journal titleCement and Concrete Research
IssueNovember 6
Pages617630; # of pages: 14
Subjectporosity; mechanical properties; magnesium; oxychloride cement; elastic properties; Concrete
AbstractMeasurements of compressive strength, modulus of elasticity, and microhardness were made on magnesium oxychloride cement systems having a wide range of porosity. Analysis of the plots of log mechanical property versus porosity gave expressions interrelating mechanical properties which were independent of porosity. Comparison of these results with those of the portland cement system show that magnesium oxychloride cement paste has a higher value of modulus of elasticity and microhardness over the porosity range studied. Microhardness of magnesium oxychloride cement paste is also greater than that for all gypsum plaster preparations in the porosity range studied. Mechanical behaviour of magnesium oxychloride cement compacts is improved when heated in water at 85 degrees C. It appears that this heat treatment results in formation of a porous body consisting mainly of Mg(OH)[2]. Among the systems magnesium oxychloride, portland cement, gypsum and magnesium hydroxide, it appears that magnesium hydroxide forms the strongest bodies.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number15131
NPARC number20375136
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Record identifiercdbca9f9-b5e6-4767-b174-eadda7005d7e
Record created2012-07-23
Record modified2016-05-09
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