Behavior of ternary blended cements containing limestone filler and fly ash in magnesium sulfate solution at low temperature

•Studied the behavior of some ternary blended cements into 5% MgSO4 solution, at 5°C.•The presence of both limestone and fly ash does not decrease the vulnerability of cements.•After 90 days of exposure, compressive strengths decrease for all samples.•The deterioration products were gypsum, ettringi...

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Bibliographic Details
Published in:Construction & building materials 2014-11, Vol.71, p.246-253
Main Authors: Saca, Nastasia, Georgescu, Maria
Format: Article
Language:English
Subjects:
Analysis
Cement
Chemical properties
Fly ash
Limestone filler
Magnesium sulfate
Magnesium sulfate solution
Mortar
Mortars
Ternary blended cements
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Summary:•Studied the behavior of some ternary blended cements into 5% MgSO4 solution, at 5°C.•The presence of both limestone and fly ash does not decrease the vulnerability of cements.•After 90 days of exposure, compressive strengths decrease for all samples.•The deterioration products were gypsum, ettringite and thaumasite–ettringite solid solution. The behavior of ternary blended cements with limestone filler and fly ash additions into 5% magnesium sulfate solution was evaluated. The presence of both limestone and fly ash in cement does not seem to decrease the vulnerability of cements to magnesium sulfate attack at 5°C in comparison with limestone filler or fly ash cements. After 90days, the compressive strengths decrease for all specimens (from 33.5MPa to 16.4MPa for Portland cement mortar and from 35MPa to 13.8MPa for 10% fly ash cement mortar) as a consequence of higher amount of deterioration products which exerts pressure in the capillare pores.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2014.08.037