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The scratch test for strength and fracture toughness determination of oil well cements cured at high temperature and pressure

TitleThe scratch test for strength and fracture toughness determination of oil well cements cured at high temperature and pressure
Publication TypeJournal Article
Year of Publication2011
AuthorsUlm F-J, James S
JournalCement and Concrete Research
Volume41
Issue9
Pagination942 - 946
Date Publishedsept-2011
ISSN00088846
Abstract

Recent advances in scratch test analysis provide new ways to relate measured scratch test properties not only to strength properties but fracture properties of materials as well. Herein, we present an application of such tools to oil well cements cured at high temperatures and pressures. We find a concurrent increase of strength and toughness of different oil well cement baseline formulations which we relate to the water-to-binder ratio for a series of cementitious materials prepared with cement and silica flour. The scratch test thus emerges as a self-consistent technique for both cohesive–frictional strength and fracture properties that is highly reproducible, almost non-destructive, and not more sophisticated than classical compression tests, which makes this ‘old’ test highly attractive for performance-based field applications.

DOI10.1016/j.cemconres.2011.04.014
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