Investigation of microstructural and mechanical properties of partially hydrated Asbestos-Free fiber cement waste (AFFC) based concretes: Experimental study and predictive modeling

Asbestos-Free Fiber Cement waste (AFFC) was tested in this study as supplementary cementitious materials (SCM) in concrete formulations. The incorporation of AFFC leads to a drop in total porosity, compressive strength and Young modulus due to the creation of capillary voids. The optimum dosage of AFFC is 10%. Below this value, the created capillary voids are not interconnected enough to form percolation paths for gas flow. A modified Feret's law combined with Eurocode 2 was proposed to predict the mechanical performance evolution with time. Finally, comparative tests between the performance of AFFC and limestone filler as SCM were also achieved. (C) 2020 Elsevier Ltd. All rights reserved.