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SPR-4724: Detection and Assessment of Sulfates in the Pavement Subgrade

Project Details
STATE

IN

SOURCE

RIP

START DATE

08/01/22

END DATE

07/31/24

RESEARCHERS

Antonio Bobet, Marika Santagata

SPONSORS

Purdue University, Indiana Department of Transportation

KEYWORDS

Costs, Detection and identification, Liming of soils, Soils, Subgrade (Pavements), Sulfates

LINKS

Project webpage

Project description

The aim of the project is to determine whether detection of sulfates in lime-treated subgrade soils that have been in service for a number of years is the result of false positives from test ITM 510. Detection of sulfates in lime-treated soils is problematic because it requires removal of the soils. This is a costly outcome, given that the subgrade soils have been in service for a number of years and the pavement may not have shown signs of distress. The problem is becoming significant given the number of maintenance and rehabilitation projects that are ongoing or planned.
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