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Title: Corrosion of Metallic Materials in Controlled Low-Strength Materials- Part 3

Author(s): Ceki Halmen, David Trejo, Kevin J. Folliard, and Lianxiang Du

Publication: Materials Journal

Volume: 102

Issue: 6

Appears on pages(s): 429-437

Keywords: controlled low-strength material; corrosion; durability

DOI: 10.14359/14806

Date: 11/1/2005

One of the largest impediments to the use of controlled low-strength materials (CLSM) is the lack of knowledge on the long-term corrosion performance of metallic materials embedded in this material. Parts 1 and 2 of this research indicated that pipes completely embedded in CLSM exhibited lower corrosion activity than pipes embedded in sand. Methods and models currently used to assess the corrosivity of soils on pipes, however, are still being used to assess the corrosivity of CLSM on pipes. These methods and models limit the use of CLSM. New models are needed to reliably assess the corrosion performance of pipes embedded in CLSM. This research reports the results of the first part of the Phase II research where the corrosion performance of ductile iron and galvanized pipes were completely embedded in 13 different CLSM mixtures. A comprehensive model was developed to predict the mass loss of pipes embedded in CLSM. The model includes significant factors that affect the long-term corrosion.