CO2 DIFFUSION IN CEMENTITIOUS MATERIALS MADE WITH BLAST FURNACE SLAG - INFLUENCE OF AN ACCELERATED CARBONATION

Author(s): Ph. Turcry, F. Gendron, A. Aït-Mokhtar
Paper category: Proceedings
Book title: Proceedings of the 2nd International RILEM/COST Conference on Early Age Cracking and Serviceability in Cement-based Materials and Structures Volume 2
Editor(s): Stéphanie Staquet and Dimitrios Aggelis
ISBN: 978-2-35158-200-8
e-ISBN: 978-2-35158-198-8
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 883-888
Total Pages: 6
Language : English

Abstract: The CO2 diffusion coefficient is a key-parameter in carbonation modelling. An experimental campaign was carried out to investigate the influence of binder type and accelerated carbonation on the diffusion coefficient of mortars and cement pastes. The latter were prepared with various water/binder ratios and different binders, namely a Portland cement (CEMI) and a mix of CEMI and blast furnace slag (BFS). All samples were oven-dried prior to diffusion tests. The non-carbonated materials containing BFS are much less diffusive than the CEMI based materials, for the same porosity, which runs counter to existing empirical models. After carbonation, BFS materials become more diffusive than CEMI ones. The observed evolutions are well correlated to changes in pore structure due to carbonation.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00