Simultaneous Use of Two Catalytic Wastes to Cement in Sustainable Construction Materials

Abstract:

This paper presents the study of the simultaneous use of two residual catalysts (RAl and RNi) with type II Portland cement, in order to avoid environmental impacts and to use of the solidified products as structural sustainable materials. The solidification/stabilization (S/S) was evaluated by thermogravimetric analysis, X ray diffraction, leaching and compressive strength tests. Mortars with water/cement mass ratio equal to 0.5 were prepared, into which, different percentual masses of each waste were added. The main phases formed due to the retarding and accelerating actions of each waste were evaluated by thermogravimetry and X ray diffraction after 28 days of hydration. The leaching tests done with the solidified mortars presented values of Ni and Al contents below maximum accepted limits, indicating that they attend to environmental legislation, as well as eliminate the original environmental impact of the original wastes. Mortars evaluated after 28 days by compressive strength tests, presented acceptable results for their possible use as construction materials.

• Periodical: Key Engineering Materials (Volume 634)
• Pages: 121-130
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.634.121
• Online since: December 2014
• Authors: Maura Berger Maltez Melchert*, Marcelo Mendes Viana, Jo Dweck
• Keywords: Catalytic Wastes, Mortar, TG-DTG, Type II Portland Cement

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