Experimental investigation of the short-term creep recovery of hardened cement paste at micrometre length scale

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
3 Downloads (Pure)

Abstract

This paper presents an experimental investigation on the short-term creep recovery of cement paste at micrometre length scale. Micro-cantilever beams were fabricated and tested with 8 different loading series using the nanoindenter. It is found that cement pastes show high recovery ratios (>80%) even subjected to very high stress levels. Relatively lower recovery ratios and non-linear creep were also observed for w/c 0.4 samples under high stress levels. A good agreement is found between the results predicted using the linear superposition principle and the experimental results except for the measured non-linear creep in w/c 0.4 samples. It is suggested that the short-term creep recovery may be associated with the microscale stress redistribution or the reversible internal water movement. The observed non-linear creep under the highest stress level may be due to the higher density of microcracks generated during the loading stage, which may further promote the water transfer.

Original languageEnglish
Article number106562
Number of pages14
JournalCement and Concrete Research
Volume149
DOIs
Publication statusPublished - 2021

Keywords

  • Cement paste
  • Creep
  • Miniaturized cantilever beam
  • Nanoindenter

Fingerprint

Dive into the research topics of 'Experimental investigation of the short-term creep recovery of hardened cement paste at micrometre length scale'. Together they form a unique fingerprint.

Cite this