Aashto Classification System Table. Classify the following soil using AASHTO. The AASHTO system uses both grain-size distribution and Atterberg limits data to assign a group classification and a group index to the soil.
Following the classification table from left to right group A-1 is eliminated due to too much material passing the No. It was originally developed in 1920 by the US. 40 Liquid Limit Plasticity Index o.
12 rows AASHTO Soil Classification System from AASHTO M 145 or ASTM D3282 General.
The AASHTO system classifies soils into seven primary groups named A-1 through A-7 based on their relative expected quality for road embankments sub-grades sub-bases and bases. 10 sieve 80 passing the No. 40 30 max 50 max 51 max -----0075 No. Classification of Soil 1- American Association of State Highway and Transportation Officials AASHTO The AASHTO classification in present use is given in Table 51.
