Long-Term Deformation Analysis of Recycled Construction Waste Subgrade Filler

Table 5

Requirements of minimum CBR and maximum particle size for subgrade fillers.

Position of filler application (below the top of roadbed) (m)		Minimum CBR (%)			Maximum particle (mm)
		Expressway and first class highway	Second class highway	Third and fourth class highway
Fill subgrade	Upper roadbed (0–0.30)	8	6	5	100
	Lower roadbed (0.30–0.80)	5	4	3	100
	Upper embankment (0.80–1.50)	4	3	3	150
	Lower embankment (>1.50)	3	2	2	150
Cut subgrade	0–0.30	8	6	5	100
	0.30–0.80	5	4	3	100