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Updated: Oct 16, 2025

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
Published on: August 31, 2017
Microscopic analysis for the oxidation of sulphide-bearing aggregate
Mona Elmosallamy1, Medhat H Shehata1
1Depatment of Civil Engineering, Ryerson University, Toronto, Ontario, Canada.
Abstract:
Mortar samples were prepared with sulphide-bearing aggregates and tested for the potential of aggregate oxidation followed by sulphate attack. Scanning Electron Microscopy and its associated Energy Dispersive X-Ray analysis were used to analyze the developed phases in the tested samples to confirm that the obtained expansion is attributable to sulphate attack. The Energy Dispersive X-Ray analysis helped identify sulphide phases in aggregates and evidence of sulphate attack in mortars. Ettringite was detected and confirmed in the mortars with sulphide-bearing aggregates suggesting that the test conditions are suitable for reproducing the damaging mechanism of sulphide oxidation.
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