A Rapid Gradation Detection System for Earth and Stone Materials Based on Digital Image

Table 1

Characteristic particle size indicators of limestone aggregates with different gradation.

Sample	Indicator	Characteristic particle size
		d60	d30	d10
1	Sieve analysis	24.5	6.0	1.7
	Image analysis	23.2	6.3	1.8
	Diff. (mm)	1.3	0.3	0.1
2	Sieve analysis	28.9	8.0	2.0
	Image analysis	27.3	8.0	2.0
	Diff. (mm)	1.6	0.0	0.0
3	Sieve analysis	34.5	12.7	2.5
	Image analysis	37.3	17.6	3.0
	Diff. (mm)	2.8	4.9	0.3
4	Sieve analysis	42.5	20.1	5.1
	Image analysis	38.9	17.8	3.9
	Diff. (mm)	3.6	2.8	1.2
5	Sieve analysis	46.3	27.4	12.3
	Image analysis	44.7	33.8	6.5
	Diff. (mm)	1.3	6.4	5.8
6	Sieve analysis	26.5	5.9	1.9
	Image analysis	32.3	9.0	2.1
	Diff. (mm)	5.8	3.1	0.2
7	Sieve analysis	38.2	16.5	3.3
	Image analysis	37.5	18.6	5.5
	Diff. (mm)	0.7	2.1	2.2
8	Sieve analysis	45.5	25.1	8.0
	Image analysis	42.6	19.3	5.3
	Diff. (mm)	2.9	5.8	2.7
9	Sieve analysis	48.5	31.5	16.8
	Image analysis	51.2	31.8	11.0
	Diff. (mm)	2.7	0.3	5.8
10	Sieve analysis	47.1	34.5	18.7
	Image analysis	47.1	38.2	7.0
	Diff. (mm)	0.0	3.7	11.7