SYMPOSIA PAPER Published: 01 January 1970

Suggested Procedure for Pedological Classification of Soils


The adaptation of the pedological system of soil classification to engineering problems, mainly for highways and airports, has been going on for over 40 years. The system is being used in whole or in part by a number of state highway departments and other agencies. The Michigan Department of State Highways started a program of this nature in 1925 and has now developed a complete design procedure tied to the identification and classification of soils by the pedological system. The Portland Cement Association adopted this system in connection with their development program in soil-cement stabilization. The “PCA Soil Primer” provides the most concise but still adequate treatment immediately available and it has been used with some amplification in the following presentation.

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Developed by Committee: D18
Pages: 333–340
DOI: 10.1520/STP38524S
ISBN-EB: 978-0-8031-5570-1
ISBN-13: 978-0-8031-0051-0