Fig. 7From: Examination of sulfate resistance of nano-alumina added ordinary Portland cement paste, focusing on the two different crystallinity of nano-aluminasThe XRD patterns of all samples before Na2SO4 exposure (zero day exposure) and after Na2SO4 exposure (28, 91, and 180 days of Na2SO4 exposure) with the reference patterns from the ICDD and the ICSD database. ■ Ettringite, ▲ Gypsum, ● Kuzelite, ▼ Portlandite, □ Calcite, △ Carbo-aluminate phase, ○ BeliteBack to article page