Resíduos cerâmicos da indústria do polo cerâmico de Iranduba e Manacapuru como material pozolânico e mitigador de reação álcalis-agregado

Abstract

This research addresses the issue of the use of ceramic waste from the ceramic brick industry in the metropolitan region of Manaus, as pozzolanic material and mitigating agent for the alkali-aggregate reaction. Reactive additions are efficient in inhibiting or reducing expansive reactions resulting from the combination of cement alkalis with potentially reactive aggregates. In order to evaluate the use of ceramic waste as a pozzolanic addition and reducing expansive reactions in cementitious materials, chemical, physical and mineralogical analyzes were carried out, thus seeking to determine its pozzolanic activity index, as well as to evaluate the possible mitigating action of alkali-aggregate reaction. From the results obtained with controlled grinding and chemical and structural characterization, using the techniques of X-ray fluorescence (FRX), X-ray diffraction (DRX), Thermogravimetry (TG), Thermigravimetric derivative (DTG), Analysis Differential Thermal (DTA) and Fourier Transform Infrared Spectroscopy (FTIR), in addition, the pozzolanic potential of additions by Chapelle's fixed calcium hydroxide content was evaluated. The results show that the RC met the physical-chemical requirements for pozzolana. The petrography and mitigation determination tests for mortar bars using 50% of the ceramic residue indicated low reactivity. Thus, it is concluded that the ceramic residue has potential use as a mitigating additive for the expansion reactions in cementitious materials and as a pozzolan.