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

Table 1

Four levels of each affecting factor.

Level	Cement (kg/m^3)	Fly-ash (kg/m^3)	Quicklime (kg/m^3)	Foam (L)
1	250	50	10	850
2	400	100	20	750
3	550	150	30	650
4	700	200	40	550