Rapid prediction of cementitious initial sorptivity via surface wettability

Hossein Kabir, Nishant Garg

Research output: Contribution to journalArticlepeer-review

Abstract

The tendency of cementitious systems to absorb and transmit liquid through capillary pores is often characterized by initial sorptivity, which is an important indicator of long-term durability. However, sorptivity measurements, which are based on the continuous mass change of specimens exposed to water, are labor-intensive (up to 6 h of continuous measurements). Here, we exploit the fundamental surface-wetting characteristics of cementitious systems to estimate their sorptivity in a rapid fashion, i.e., in a matter of few minutes. In a series of 63 distinct paste systems of varying w/c ratios (0.4–0.8), subject to a range of curing periods (1–7d), we establish strong correlations (adjusted R 2 ≥ 0.9) between the initial sorptivity (~6 h) and dynamics of drop spreading (contact angle ~0.5 s, drop residence time <10 min). These results elucidate rapid pathways in estimating initial sorptivity and durability of a broad variety of hydrated cementitious matrices.

Original languageEnglish (US)
Article number52
Journalnpj Materials Degradation
Volume7
Issue number1
DOIs
StatePublished - Dec 2023

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry (miscellaneous)
  • Materials Science (miscellaneous)
  • Materials Chemistry

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