Strength development in magnesium oxysulfate cement

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Journal titleCement and Concrete Research
IssueJanuary 1
Pages103112; # of pages: 10
Subjectcement; mechanical properties; porosity; elastic modulus; hardness; Concrete
AbstractModulus of elasticity and microhardness measurements were made on magnesium oxysulfate systems (paste and compacted) having a wide range of porosity. Three sets of compacts were made; each set was made with particles having a different size range (5 to 150 mum; 150 to 300 mum; 300 to 600 mum). The log mechanical property versus porosity curves for paste samples were linear. The curves for compacted samples had a change in slope at 7.5 per cent porosity. At porosities less than 7.5 per cent, the data for paste and compacted samples were on the same curve. At higher porosities microhardness values for compacted samples were greater than those for paste samples; modulus of elasticity values were less. Compacted samples made with finest particles had higher values for mechanical properties at a given porosity. The mechanical behaviour of these systems was explained on the basis of the relative contribution of porosity, pore size distribution, interparticle bonds and strength of the solid phase.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number16400
NPARC number20375717
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Record identifierbfa034be-b195-4571-8d2d-fcc236ba60f4
Record created2012-07-23
Record modified2016-05-09
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