Experimental Research on Foamed Mixture Lightweight Soil Mixed with Fly-Ash and Quicklime as Backfill Material behind Abutments of Expressway Bridge

Table 4

Physical properties of cement.

Physical properties	Test results
Specific surface, m^2/kg	256
Compressive strength, MPa	28.8 (3 days)/45.3 (28 days)
Initial set, minutes	165
Final set, minutes	232
Water consumption of normal consistency (%)	25.6
Fineness (80 μm, %)	1.2