Title:
Dynamic and Quasi-Static Nanoindentation of C-S-H and C-A-S-H
Author(s):
William Hunnicutt, Paramita Mondal, and Leslie Struble
Publication:
Symposium Paper
Volume:
312
Issue:
Appears on pages(s):
1-15
Keywords:
C-A-S-H, C-S-H, compaction, dynamic, nanoindentation, NMR, viscoelasticity
DOI:
10.14359/51689374
Date:
10/1/2016
Abstract:
The viscoelastic nature of concrete is a topic of much study and the calcium-silicate-hydrate (C-S-H) phase is believed to be largely responsible for this viscoelastic behavior. In this study the viscoelastic properties of synthesized calcium-silicate-hydrate (C-S-H) and calcium-alumino-silicate-hydrate (C-A-S-H) are measured by quasi-static and dynamic nanoindentation. A protocol for synthesizing and preparing samples for chemical and mechanical characterization is presented. The addition of aluminum to C-S-H has been previously shown to modify its molecular structure, a modification that is expected to change the viscoelastic behavior. The results indicate that C-A-S-H behaves more viscously than C-S-H and a number of factors are discussed.