Segregation robustness of self-consolidating concrete: new testing method and effect of aggregate properties

Author(s): Lin Shen, Hamed Bahrami Jovein, Li Ai, Haijian Shi
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 245-252
Total Pages: 8
Language: English

The fresh properties of self-consolidating concrete (SCC) are typically sensitive to small changes of material properties such as moisture content of aggregates, dosage of superplasticizer, etc. To consistently maintain the desired performance in mass production of SCC, it is essential to design and select a SCC mix which is robust against small variations in raw materials. A new testing method, modified Segregation Probe, was found to be able to quickly quantify and rank the stability robustness of various candidate mixes. This test can be performed in a pan or drum mixer and finished in about 15 minutes. It was found that higher paste volume, smaller aggregate size, better gradation, and higher aggregate packing density can improve robustness. Among these factors, smaller aggregate size and better gradation seem to have more significant effects than higher paste volume and higher aggregate packing density.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00