Permeability Properties of Crushed Stone Aggregates in Bedding Course of Urban Permeable Roads: An Experimental Study

Table 3

The optimal gradation and compaction levels.

Gradation and initial compression		Permeability	Mass loss	The mass loss rate
0.4	10	R	R	N
	20	R	N	N
	30	R	N	N
	40	R	N	R
0.5	10	R	N	N
	20	U	N	R
	30	R	N	N
	40	R	N	N
0.6	10	N	R	R
	20	R	N	N
	30	R	N	N
	40	R	N	N
0.7	10	R	R	R
	20	R	R	R
	30	N	U	R
	40	N	U	R