Title:
Characterization of Colored Self-Compacting Concretes
Author(s):
Valeria Corinaldesi and Saveria Monosi
Publication:
Symposium Paper
Volume:
288
Issue:
Appears on pages(s):
1-13
Keywords:
CaO-based expansive agent; cement paste rheology; colored self-compacting concretes; inorganic pigments; shrinkage-free SCC; shrinkage-reducing admixture.
DOI:
10.14359/51684240
Date:
9/14/2012
Abstract:
This paper presents the results of an investigation carried out to develop colored self-compacting concretes (SCCs), especially devoted to architectural structures. Two different inorganic pigments were tested, both at a dosage of 20 kg [44.09 lb] per cubic meter of concrete, replacing limestone filler. The first is cobalt-salt based (for blue-colored SCC), the other iron-oxide based (for red colored SCC). SCC mixtures were characterized in the fresh state by means of slump flow and V-funnel tests as well as after hardening by means of compression tests and free dying shrinkage measurements. The influence of the inorganic pigments as well as of fly ash addition on the rheological behavior of the SCCs was also previously studied by means of rheological tests on cement pastes. Low water/binder ratio (0.45) was always adopted for durability reason. Moreover, shrinkage-free SCC was studied due to the combined use of a CaO-based expansive agent and a shrinkage reducing admixture.