Influence of silane on hydration characteristics and mechanical properties of cement paste

Binmeng Chen, Hongyu Shao, Bo Li, Zongjin Li

Research output: Journal PublicationArticlepeer-review

17 Citations (Scopus)

Abstract

In the present study, silane coupling agents (SCAs) were used as admixture in cement paste. The influence on the cement hydration in different stages as well as the mechanical properties were well investigated. Results demonstrated that silanes play a role of retardant in cement paste at the very early age, the proposed mechanism laid in the attraction force between the intermediate hydrolysis products of silanes and the cement hydrated products. The intermediate hydrolysis products can form a gel-like barrier covering the cement hydrated products and were further proved by the designed pre-hydrolysis experiments using calorimeter and Fourier transform infrared spectroscopy (FTIR). However, cement paste modified by silane would have denser structure compared to neat paste as a result of reaction between polycondensated silane and CH after 28 days of curing, leading lower porosity, higher hydration degree and better mechanical performance.

Original languageEnglish
Article number103743
JournalCement and Concrete Composites
Volume113
DOIs
Publication statusPublished - Oct 2020

Keywords

  • Cement hydration
  • Non-contact resistivity measurement
  • Silane coupling agents (SCAs)

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science (all)

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