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16

Long-term moisture transport in high performance concrete



Title: Long-term moisture transport in high performance concrete
Author(s): L.-O. Nilsson
Paper category : journal
Serial title: Concrete Science and Engineering
Abreviated Serial title: Concr. Sc. Eng.
ISSN: 1295-2826
Publisher: RILEM Publications SARL
Volume: 4
Issue: 16
Issue date: 2002-12-01
Publication year: 2002
Pages: 641 - 649
Total Pages: 9
Nb references: 12
Language: English


Abstract: 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 trans-
port 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,especially when combined with fly ash and it con-
tinues 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 submerged HPC will be affected by self-desic-
cation for a very long time because of the extremely small
moisture flow.


Online publication: 2002-10-30
Classification: Scientific Reports
Publication type : full_text
Public price (Euros): 0.00