Open Access

Ecological Concrete Based on Blast-Furnace Cement with Incorporated Coarse Recycled Concrete Aggregate and Fly Ash Addition

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1 Faculty of Civil Engineering, Mechanics and Petrochemistry (Płock), Warsaw University of Technology, Pl. Politechniki 1, 00-661 Warszawa, Poland
2 Faculty of Civil Engineering, Experimental Centre, Czech Technical University in Prague, Zikova 1903/4, 166 36 Praha 6, Czech Republic

* Corresponding author:

Journal of Renewable Materials 2017, 5(Suppl.1), 53-61. https://doi.org/10.7569/JRM.2017.634103

Abstract

This article deals with an experimental study concerning the development of concrete mixtures with significant ecological benefits. The studied concrete mixtures were based on blast-furnace cement, with an additional application of supplementary cementitious materials—fly ash, metakaolin, and silica fume and fluidized fly ash. Coarse aggregate in the form of crushed concrete was applied for all studied concrete mixtures. The experimental program was primarily focused on the assessment of the durability properties of the studied mixtures in terms of mechanical tests, absorption tests, chloride migration coefficient tests, water penetration tests, and accelerated carbonation depth tests. The results obtained showed good potential for waste materials in durable concrete production. The studied mixtures, with incorporated supplementary cementitious materials, exceeded the level of high performance concrete (HPC) in terms of mechanical properties. Such modification of the binding system also significantly contributed to an increase in durability properties; however, mixtures with the fluidized fly ash application exhibited reduced resistance to carbonation.

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