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A platform for research: civil engineering, architecture and urbanism
External sulfate attack on alkali-activated slag
Highlights External sulfate attack on alkali-activated slag (AAS) was studied. Sulfate attack was performed by 5% Na2SO4 solution. Portland-slag cement (CEM II/А-S 42.5N) was used as a benchmark material. Sulfate attack led to a decrease in strength of CEM II, but not of AAS. Alkali-activated slag showed higher resistance to sulfate attack.
Abstract This paper analyses the effects of external sulfate attack (5% Na2SO4 solution) on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/А-S 42.5N) was used as a benchmark material. External sulfate attack led to a decrease in strength of CEM II, but not of AAS. Under the investigated experimental conditions, AAS showed significantly higher resistance to sulfate attack with respect to the benchmark CEM II. A very pronounced resistance of AAS to sulfate attack can be explained by the absence of portlandite and unavailability of aluminum, present in C–S–H(I) and hydrotalcite gels, for the reaction with sulfates.
External sulfate attack on alkali-activated slag
Highlights External sulfate attack on alkali-activated slag (AAS) was studied. Sulfate attack was performed by 5% Na2SO4 solution. Portland-slag cement (CEM II/А-S 42.5N) was used as a benchmark material. Sulfate attack led to a decrease in strength of CEM II, but not of AAS. Alkali-activated slag showed higher resistance to sulfate attack.
Abstract This paper analyses the effects of external sulfate attack (5% Na2SO4 solution) on mechanical and microstructural properties of alkali-activated slag (AAS). Portland-slag cement (CEM II/А-S 42.5N) was used as a benchmark material. External sulfate attack led to a decrease in strength of CEM II, but not of AAS. Under the investigated experimental conditions, AAS showed significantly higher resistance to sulfate attack with respect to the benchmark CEM II. A very pronounced resistance of AAS to sulfate attack can be explained by the absence of portlandite and unavailability of aluminum, present in C–S–H(I) and hydrotalcite gels, for the reaction with sulfates.
External sulfate attack on alkali-activated slag
Komljenović, M. (author) / Baščarević, Z. (author) / Marjanović, N. (author) / Nikolić, V. (author)
Construction and Building Materials ; 49 ; 31-39
2013-08-09
9 pages
Article (Journal)
Electronic Resource
English
External sulfate attack on alkali-activated slag
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