SHORT-TERM CREEP OF CEMENT PASTE: EXPERIMENTS AND MULTISCALE MODELING

Author(s):Markus Königsberger, Muhammad Irfan-ul-Hassan, Christian Hellmich,
Bernhard Pichler
Paper category: Proceedings
Book title: proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference segment on Service Life of Cement-Based Materials and Structures
Editor(s): Miguel Azenha, Ivan Gabrijel, Dirk Schlicke, Terje Kanstad and Ole Mejlhede Jensen
ISBN:978-2-35158-171-4
e-ISBN: 978-2-35158-173-5
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 665-673
Total Pages: 9
Language : English

Abstract: This contribution is devoted to the analysis of three minute uniaxial compressive creep tests
on cement paste specimens. One such test was performed every hour and corresponding
material ages were spanning from 21 hours to eight days. The material microstructure remains
virtually unaltered during each individual creep test. Subsequent creep tests refer to different
microstructures. The observed age- and composition-dependent creep behavior results from
the viscoelastic behavior of the reaction products of cement and water, called hydrates. A
single isochoric power-law creep function characterizing well-saturated Portland cement
hydrates is identified through micromechanics-based downscaling of 500 different non-aging
creep functions, derived in the aforementioned three minute tests. The validity of the
identified hydrate creep properties is further corroborated by successful prediction of the
creep evolution of a 30 years old cement paste in a 30 day creep test.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00