Role of Sulfates on Highway Heave in Lake County, Ohio. Research Executive Summary Report.

摘要

Significant highway heaving problems have been reported recently in Lake County, Northeast Ohio. The heaving is believed to be due to swelling of sulfate-bearing soils. Specifically, the formation of ettringite [Ca6Al2(SO4)3(OH)12 · 26H2O] with its associated 250% volume expansion has been identified as the cause of highway heaving in other locales. These mineral reactions may occur rapidly over hours to days or slowly over months to years. The goal of this project is to provide sound scientific data regarding the presence of sulfate minerals and the amount of soluble sulfate in the affected soils, and the distribution of sulfates in the soils in order to assist ODOT in determining the most cost effective highway construction method in the area of interest.