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

Table 5

The range analysis results.

Level parameters	Affecting factor
	Cement	Fly-ash	Quicklime	Foam
Wet density
	734.5	934.5	889.5	792.5
	856.8	952.5	910.0	803.8
	987.5	861.8	905.0	960.0
	1030.0	860.0	904.3	1052.5
	295.5	92.5	20.5	260.0
Sensitivity sequence	Cement > foam > fly-ash > quicklime
Compressive strength
	0.605	1.833	1.618	1.000
	1.285	1.960	1.728	1.003
	2.425	1.613	1.755	2.040
	2.488	1.398	1.703	2.760
	1.883	0.563	0.138	1.760
Sensitivity sequence	Cement > foam > fly-ash > quicklime