Application of nanomechanical methods in investigation of C-S-H gel/cement grain interface

Research output: Contribution to conferencePaper

Abstract

Investigation on the mechanical properties of cement-based materials at micron and submicron scales is important for understanding the overall performance, particularly of high-performance concrete (HPC). Due to low water-to-cement ratio of HPC, a large amount of unhydrated cement grains remain in matrix, and a significant impact of the interface between C-S-H gel and cement grains on concrete behavior could be expected. Recent progress in experimental nanomechanics opens new access to nanoengineering of cement-based composites. In this paper, nanoindentation and viscoelastic modulus mapping were used to study the interfacial properties. The interface width measured by modulus mapping was around 200 nm as compared to a rough estimation of less than 5 μm by nanoindentation, due to the fact that two orders of magnitude increase in spatial resolution could be achieved with modulus mapping.

Original languageEnglish (US)
Pages289-297
Number of pages9
DOIs
StatePublished - Jan 1 2014
Event4th International Conference on the Durability of Concrete Structures, ICDCS 2014 - West Lafayette, IN, United States
Duration: Jul 24 2014Jul 26 2014

Other

Other4th International Conference on the Durability of Concrete Structures, ICDCS 2014
CountryUnited States
CityWest Lafayette, IN
Period7/24/147/26/14

Keywords

  • Cement-based materials
  • Interface
  • Nanomechanical properties

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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  • Cite this

    Xu, J., Corr, D. J., & Shah, S. P. (2014). Application of nanomechanical methods in investigation of C-S-H gel/cement grain interface. 289-297. Paper presented at 4th International Conference on the Durability of Concrete Structures, ICDCS 2014, West Lafayette, IN, United States. https://doi.org/10.5703/1288284315414