![]() ![]() There are 7 major groups present in AASHTO soil classification system which are further divided into subgroups. In AASHTO soil classification system, soils are classified in group and subgroups.AASHTO soil classification system is mainly based on sieve analysis and consistency limits.The AASHTO soil classification system is generally used for soil classification for highway construction projects and is very much used worldwide.The AASHTO soil classification system was initiated by Highway Research Board in 1943. The AASHTO soil classification system was first developed by Terzaghi and Hogentogler in 1929 and has been revised many times. ![]() AASHTO soil classification system is given by the American Association of State Highway and Transportation officials.AASHTO soil classification system is one of them. There are so many popular system of soil classification system.Soil classification is generally done to organize the different types of soil in different groups on the basis of their engineering properties. ![]()
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