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A platform for research: civil engineering, architecture and urbanism
Microstructure parameters affecting alkali–silica reactivity of aggregates
Highlights Quantitative analysis of ASR of aggregates. Quantitative analysis of microstructural parameters of aggregates. Factors affecting ASR of metamorphic rock types. Influence of quartz deformation on ASR.
Abstract Quartz-rich aggregates were investigated, with the purpose of detecting the parameters facilitating the alkali–silica reactivity (ASR) of aggregates. ASR was attributed to their microstructure. Both decreasing grain size and elongated grain shape increase the specific surface, and increase the ASR. The degree of deformation and recrystallization is suggested to be responsible for ASR, due to its effects on grain size and grain shape. A high degree of ASR was found to be connected with those samples which had recrystallized by a low-temperature recrystallization regime, characterised by very small grains.
Microstructure parameters affecting alkali–silica reactivity of aggregates
Highlights Quantitative analysis of ASR of aggregates. Quantitative analysis of microstructural parameters of aggregates. Factors affecting ASR of metamorphic rock types. Influence of quartz deformation on ASR.
Abstract Quartz-rich aggregates were investigated, with the purpose of detecting the parameters facilitating the alkali–silica reactivity (ASR) of aggregates. ASR was attributed to their microstructure. Both decreasing grain size and elongated grain shape increase the specific surface, and increase the ASR. The degree of deformation and recrystallization is suggested to be responsible for ASR, due to its effects on grain size and grain shape. A high degree of ASR was found to be connected with those samples which had recrystallized by a low-temperature recrystallization regime, characterised by very small grains.
Microstructure parameters affecting alkali–silica reactivity of aggregates
Šachlová, Šárka (author)
Construction and Building Materials ; 49 ; 604-610
2013-08-29
7 pages
Article (Journal)
Electronic Resource
English
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