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The technique of soil stabilization is usually adopted with the purpose of rendering plastic soils coherent to the\udstandards and requirements of engineering projects. The environmental benefits of soil stabilization versus the use of traditional\udnatural material from quarries are generally underestimated. The case study of one significant section of the Italian\udHigh Speed Railway is presented here. This section is a part of the line from Milan to Venice. The volume of material\udthat is needed for the development of embankments amounts to about 3 million m3 and 1.5 millions m3 of aggregates are\udneeded for concrete. At the same time the construction of foundations produces about 1 million m3 of soil: 350,000 m3\udfrom foundations, 400,000 m3 from diaphragms and drilled piles and 70,000 m3 from helicoidal piles. The need to manage\udsuch a significant volume of soil suggests the need for the consideration of recycling the clay soil after lime stabilization.\udThe technical compatibility is here verified. The total costs of all the actions derived from the Environmental Impact Assessment\udfor environment protection is less than 8% of the savings produced by the stabilization of soil. It finally demonstrates\udthat the question of non-renewable resource management, such as soil, is strategic also under an environmental\udprotection perspective

the open environmental engineering journal

Externalities of Soil Stabilization in the Construction of Main Transportation Infrastructures. The Case of the High Speed Railway in North Italy: Economical and Environmental Benefits