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Long-term moisture transport in high performance concrete

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Author

Summary, in English

Moisture is decisive for a large number of binding and transport processes in high performance concrete affecting the durability, shrinkage and performance in various envi-ronments. An experimental study on the moisture transport properties of 20 concrete mixes was made during seven years, with type of binder, additives and water-binder ratio as parameters. An upside-down glass cup method was used to obtain the steady-state flow through concrete discs.



The moisture diffusion coefficient decreases with a lower water-binder ratio, increasing amount of silica fume, espe-cially when combined with fly ash and it continues to decrease also after four years for w/B lower than 0.40. The moisture diffusion coefficient is much less moisture dependent for HPC than for normal concrete, which means that steady-state moisture profiles through HPC structures will be almost linear. Long-term moisture profiles in sub-merged HPC will be affected by self-desiccation for a very long time because of the extremely small moisture flow.

Publishing year

2002

Language

English

Pages

641-649

Publication/Series

Materials and Structures

Volume

35

Issue

10

Document type

Journal article

Publisher

Springer

Topic

  • Materials Engineering

Keywords

  • moisture
  • Concrete
  • moisture transport

Status

Published

ISBN/ISSN/Other

  • ISSN: 1359-5997