ADVANCED OXIDATIVE PROCESS (AOP) IN GEOPOLYMER SLURRIES WITH TIO2 WASTE ADDITION

Reference	Presenter	Authors (Institution)	Abstract
04-038	Marcelo Strozi Cilla	Amorim Júnior, N.S.(Federal University of Bahia); Andrade Neto, J.d.(Federal University of Bahia); Cilla, M.S.(Universidade Federal da Bahia); RIBEIRO, D.V.(Federal University of Bahia);	The control of CO2 emissions has been one of the main ways to combat global warming, and reduction of Ordinary Portland Cement (OPC) consumption is one of the alternatives adopted, since its production releases a large amount of CO2, besides the high energy consumption and natural resources, factors that make it ecologically inefficient. In this context, the search for eco-friendly alternative binder (EFAB), where it is found the alkali-activated cement-based binders (AACB), also called geopolymers, produced through the alkali activation of different materials (e.g.: metakaolin, fly ash, blast furnace slag) as well Civil Construction Wastes (CCW) and Mining and Quarrying Wastes (MQW) has been the focus of several researches. Recent studies on AACB do not confirm their carbon footprint advantage over OPC, but the possibility of using waste as raw material, as well is considered an emerging field in the environmental construction industry. Thus, the present work has the objective of evaluating the performance of geopolymer slurries produced with alkali-activated metakaolin with additions of 7.5 and 15.0 wt.% of unreacted ore (UOW) waste from the production of the TiO2 pigment, to promote the Advanced Oxidative Process (AOP) aimed to reducing the environmental impact of the construction industry For this, tests of tensile strength in flexion, axial compression strength, water absorption by capillarity, apparent density and porosity, besides the degradation test of organic compound by photocatalysis. The results obtained evidenced that the addition of the UOW did not affect the physical properties of the geopolymer slurries, but incorporating a photocatalytic effect, with degradation of methylene blue organic compound.
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