Comparative evaluation of use silica fume, blast furnace slag, limestone, metakaolin and red mud as supplementary cementitious materials for con- crete

Author(s): Roberto Cesar de Oliveira Romano, José Augusto Ferreira Sales de Mesquita,
Gabriel Carpinelli Perozzi Brasileiro, Maria Alba Cincotto and Rafael Giuliano
Pileggi
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
Editor(s): Marijana Serdar, Nina Štirmer, John Provis
ISBN: 978-2-35158-217-6,
Vol 1. ISBN: 978-2-35158-223-7
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 35-42
Total Pages: 8
Language : English

Abstract: A comparative study of different kinds of supplementary cementitious materials (SCM) in microconcrete was done monitoring the fresh and hardened state properties. Compositions were formulated with silica fume, blast furnace slag, limestone, metakaolin or red mud (in natura or calcined at 800°C). Portland cement was partially replaced by 5 or 10%, in volume, of each SCM and the microconcretes mixed maintaining the water-to-solid ratio constant. The impact of each mineral addition during the mixing stage and in the rheological properties was evaluated using a planetary rheometer, while the changes in the hardened state properties were discussed in function of results of compressive strength, modulus of elasticity, air-permeability and dimensional variation. The aspects related to the ecoefficiency index, i.e., binder consumption by unity of strength, was used to evaluate the sustainability of each microconcrete and it was concluded that the compositions developed in this work associate high performance with very low binder consumption, representing that the concepts applied in this work to formulate the microconcretes allowed the production of cementitious components with an excellent ecoefficiency index.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00