LATERITE AND LATERITIC SOILS AND OTHER PROBLEM SOILS OF AFRICA DEVELOPMENT OF ENGINEERING STANDARDS AND CRITERIA FOR THE USAGE OF LATERITC, LATERITIC SOILS, A OTHER PROBLEM SOILS IN CONNECTION WITH THE CONSTRUCTION OF ROADS, HIGHWAYS AND AIRFIELDS

摘要

Roadway design practices in the tropics have evolved, by and large, from American and European experience. The adequacy of these procedures, which were devised through experience with temperate zone soils, have never really been evaluated for the climatic conditions, the soils, and the traffic patterns of tropical Africa. It was therefore decided that lateritic materials, so plentiful in tropical areas, should be studied in a thorough research program. This document represents the results of such a study carried out in tropical Africa, with emphasis on Ghana. A review of the pertinent literature is provided for both lateritic soils and tropical black clays, and the engineering properties of both types are described. (Author)