Eco-concrete for precast elements with effective mineral micro- and eco-fillers

Author(s): Gheorghe-Alexandru David, Joachim Juhart, Elke Krischey, Claudia Baldermann, Florian Mittermayr, Markus Krüger
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference
Materials, Systems and Structures in Civil Engineering 2016
Segment on Concrete with Supplementary Cementitious Materials
Editor(s): Ole M. Jensen, Konstantin Kovler and Nele De Belie
ISBN:978-2-35158-178-0
e-ISBN: 978-2-35158-179-7
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 202-211
Total Pages: 10
Language : English

Abstract: One essential requirement of precast concrete is a high early age strength, usually reached by a high content of fine Portland cement (OPC). In times of climate change, however a reduction of the global warming potential GWP and demand of primary energy PE of concrete is a desirable goal that can be reached by a low content of OPC. In this study it is shown, how mineral micro-fillers (MFs) in combination with so-called eco-fillers (EFs) can help to reduce the content of OPC of precast concrete leading to a reduction of GWP (up to - 24 %) and PE (-14 %) while keeping an early age strength as high as that of a standard precast concrete. It is analysed how different fillers, depending on their fineness and type, influence the early- age- (i.e. 8 h with heat treatment), 28 d- strength, workability and demand of superplasticizer. Powder-materials of limestones, dolomites and ground granulated blast- furnace slag were used as very fine MFs (d50 < 3 μm) and EFs (3 μm d50 30 μm).

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00