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- W2364996672 abstract "The appearance observation,mineral composition,as well as microstructure morphology towards various cement pastes and motars with and without 30% fly ash or 50% slag dipped in 5% Na2SO4 solution at room temperature for 2 years were character-ized by X-CT,X-ray diffraction and scanning electron microscopy to investigate the effects of mineral admixtures such as slag and fly ash on the sulfate resistance performance of cement-based materials from the micro-level angle.The results show that the specimens without mineral admixtures appear three different attack states from surface to inside,i.e.,the gypsum area,the ettringite area and the unaffected area.Mineral admixtures can improve the sulfate resistance performance of cement-based materials via synergy effect of reducing C3A content,pozzolanic reaction and micro-aggregates filling.However,the improper content of slag in cement-based mate-rials has a negative effect on the sulfate resistance performance as active Al3+ reacts with SO42-to form massive ettringite.The sand aggregates can hinder the development of micro-cracks and increase the internal heterogeneity of the specimens.It is revealed that the content,particle size and distribution of aggregate all have effects on the sulfate resistant performance of cement-based materials,which should be a further research aspect." @default.
- W2364996672 created "2016-06-24" @default.
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- W2364996672 date "2012-01-01" @default.
- W2364996672 modified "2023-09-23" @default.
- W2364996672 title "Effect of Mineral Admixtures on Sulfate Attack Resistance of Cement-Based Materials" @default.
- W2364996672 hasPublicationYear "2012" @default.
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