OPSS aggregates

Grain size analysis, percent passing

Sieve size (mm)	A		B I		B II		B III		M		O		SSM
	High	Low	High	Low	High	Low	High	Low	High	Low	High	Low	High	Low
150			100	100			100	100					100	100
106					100	100
37.5											100	100
26.5	100	100	50	100	50	100	50	100			95	100	50	100
19	85	100							100	100	80	95
13.2	65	90							75	95	60	80
9.5	50	73					32	100	55	80	50	70
4.75	35	55	20	100	20	55	20	90	35	55	20	45	20	100
1.18	15	40	10	100	10	40	10	60	15	40	0	15	10	100
0.3	5	22	2	65	5	22	2	35	5	22			5	95
0.15		15											2	65
0.075	2	8	0	8	0	10	0	8	2	8	0	5	0	25
d60	13	6	35	0.25	25	6	40	1.2	10	5	15	7	35	0.15
d10	0.7	0.1	1	0.08	1.2	0.075	1.2	0.085	0.6	0.09	2.5	0.3	1.2	NN
Content Uniformity	19	60	35	3	21	80	33	14	17	56	6	23	29
Void ratio (Vukovic)	0.26	0.26	0.26	0.40	0.26	0.26	0.26	0.27	0.27	0.26	0.34	0.26	0.26
Mean void ratio (Vukovic)	0.26		0.33		0.26		0.26		0.26		0.3		0.26
K(Hazen)(mm/hr)	1764	36	3600	23.04	5184	20.25	5184	26.01	1296	29.16	22500	324	5184	NN
Mean K(hazen)(mm/hr)	900		1812		2602		2605		663		11412		NN

Where void ratio has been estimated from the coefficient of uniformity (C_U): $V_{R}=0.255\left(1+0.83^{C_{U}}\right)$ Where coefficient of uniformity is the ratio of the 60th and 10th percentile grain sizes: $C_{U}={\frac {d_{6}0}{d_{1}0}}$

The void ratio (e) of a mixture is the ratio of the volume of void-space to the volume of solids. It is closely related to the concept of porosity (n) where porosity is the ratio of the volume of void-space to the total or bulk volume of the mixture. e = Volume of voids/Volume of solids = n/(1-n)

The void ratio (e) of a mixture is the ratio of the volume of void-space to the volume of solids. It is closely related to the concept of porosity (n) where porosity is the ratio of the volume of void-space to the total or bulk volume of the mixture. e = Volume of voids/Volume of solids = n/(1-n)

A broad category of particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates, and available in various particulate size gradations.