19 research outputs found
Modelling the influence of age of steel fibre reinforced self-compacting concrete on its compressive behaviour
Steel fibre reinforced self-compacting
concrete (SFRSCC) can combine the benefits of
self-consolidating concrete technology with those
derived from adding steel fibres to quasi-brittle
cement based materials. In a recent applied research
project joining pre-casting industry, private and
public research institutions, a method was developed
to design cost-competitive SFRSCC of rheological
and mechanical properties required for the prefabrication
of SFRSCC fac¸ade panels. To assure safe
demoulding process of the panels, the influence of the
concrete age on the compression behaviour of the
SFRSCC should be known. For this purpose, series of
tests with specimens of 12 h to 28 days were tested in
order to analyze the age influence on the compressive
strength, strain at peak stress, Young’s modulus, and
compressive volumetric fracture energy. The experimental
program was divided in two groups of test
series, one with SFRSCC of a volumetric fibre
percentage of 0.38% and the other with 0.57%. To
apply the obtained data in the design and numerical
analysis framework, the influence of the age on
these SFRSCC properties was modelled. This work
describes the carried out experimental program, presents and analyzes the obtained results, and
provides the derived analytical expressions