Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

AVERAGE ENGINEERING PROPERTIES OF SOIL GROUPS *
257
Quality Assurance Handbook for Rural Roads
ANNEX 300.2
Group Symbol Proctor Compaction Permeability Typical Design Values 11
Maximum Dry Optimum Water (10-6 cm/sec) CBR (%) ks (kg/cm3 )
Density (g/cm3 ) Content (%)
GW > 1.907 < 13.3 27000 ± 13000 40–80 8.304–13.840
GP > 1.763 < 12.4 64000 ± 34000 30–60 8.304–13.840
GM > 1.827 < 14.5 > 0.3 40–60(f) 8.304–13.840(f)
GC > 1.843 < 14.7 > 0.3 20–40 5.536–13.840
SW 1.907 ± 0.080 13.3 ± 2.5 * 20–40 5.536–11.072
SP 1.763 ± 0.032 12.4 ± 1.0 > 15.0 10–40 4.152–11.072
SM 1.827 ± 0.016 14.5 ± 0.4 7.5 ± 4.8 15–40(f) 4.152–11.072(f)
SM-SC 1.907 ± 0.016 12.8 ± 0.5 0.8 ± 0.6 – –
SC 1.843 ± 0.016 14.7 ± 0.4 0.3 ± 0.2 5–20 2.768–8.304
ML 1.651 ± 0.016 19.2 ± 0.7 0.59 ± 0.23 15 or less 2.768–8.304
ML-CL 1.747 ± 0.032 16.3 ± 0.7 0.13 ± 0.07 – –
CL 1.731 ± 0.016 17.3 ± 0.3 0.08 ± 0.03 15 or less 1.384–4.152
OL * * * 5 or less 1.384–2.768
MH 1.314 ± 0.064 36.3 ± 3.2 0.16 ± 0.10 10 or less 1.384–2.768
CH 1.506 ± 0.032 25.5 ± 1.2 0.05 ± 0.05 15 or less 1.384–4.152
OH * * * 5 or less 1.384–2.768
* Source : Soil Engineering in Theory and Practice Part-1, Third Edition, Fundamentals and General Principles by Alam Singh and
G R Chowdhary, CBS Publishers and Distributors, Delhi, 1994.