The sludge was characterized according to ABNT NBR /, following the procedures for obtaining leached extract (ABNT NBR /), to classify . Brazilian Association of Technical Norms, in ABNT NBR Procedure for obtention leaching extract of solid wastes (Rio de Janeiro, ), p. 16 8. Brazilian Association of Technical Regulation. Procedures for obtainment of leaching extract from solid residues. Rio de Janeiro: ABNT (NBR ).
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Technical feasibility of the incorporation of rice husk ash, sludge from water treatment plant and wood ash in clay for ceramic coating. Brasilia, Distrito Federal – Brasil, rmsposto unb. The methodology involved analyzing the technological properties of various compositions. The sintering was carried out in a muffle furnace.
Study for vitreous waste recovery in the formulation of heavy clay ceramics
The properties studied were: A queima foi feita em forno tipo mufla. Preoccupation with environmental impacts related to the lack abnr adequate solutions for industrial residuals has stimulated researchers to seek feasible uses for these residuals in abbnt production of material for civil construction.
Residual recycling contributes to a better environment and economizes prime material. As examples, cited can be the use of chamotte, glass, rock dust, wood ash and rice husk ash incorporated in the ceramic mass for blocks.
In this work, three types of residues as an additive to ceramic mass were investigated for the production of ceramic coating. The residues studied were: 1005 estimates for the generation of these residues: The following properties were determined: The leaching process consists in separating certain substances contained in the industrial residuals by means of washing or percolation processes.
The chemical analysis of the solution was performed in an atomic absorption spectrophotometer. The solubilizing process involves adding deionized or distilled water to the residual, followed by agitation and filtration.
After sintering, the samples were submitted to tests to determine water absorption WAbs. Their results were obtained from the arithmetic averages of three replicates with their respective deviation standards. The results were obtained from the arithmetic averages of three replicates with their respective standard deviations.
The samples were molded into prismatic blades with dimensions of 6. Cooling was done naturally during the night.
Rotator for non volatile substances TE-743
Observing the values in Table 1it can be concluded that the residuals are not dangerous and pertain to Class I. Solubility tests were performed to determine their classification.
When observing the values given in Table 2it can be verified that RHA was classified as Class IIa not inert with values bant sodium and manganese above the maximum limit. The SWTS was also classified as Class IIa not inertwith the iron, chromium, cadmium and manganese and lead values above the maximum limit.
The WA was classified as Class IIa not inert with the values of the chromium, cadmium, and lead above the maximum limit. Table 3 presents the results for the physical-mechanical properties of the ceramic samples with dimensions 6. Comparing the values of the physical-mechanical properties with the ABNT NBR specifications previously presented in Table 3it was verified that: Figure 2 presents zbnt visual aspects of the compositions utilized.
The results obtained display the importance of feasibility studies about incorporating residuals in ceramic mass so that the compositions obtained have satisfactory mechanical behavior and are in accordance with the specifications actually required for the production of ceramic coatings.
The compositions that presented the greatest potential for utilization were: In conclusion, it was observed that the residuals analyzed herein could reduce industrial processing costs from the origin to the final destination ceramic factory.
In addition, they present an adequate environmental solution because their usage in this manner guaranties lower negative environmental impacts generated by degraded areas. Rio de Janeiro, All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.
Services on Demand Journal. Introduction Preoccupation with environmental impacts related to the lack of adequate solutions for industrial residuals has stimulated researchers to seek feasible uses for these residuals in the production of material for civil construction. Materials and methods 2.
Results and Discussion 3. The following compostions were used: Conclusions The results obtained display the importance of feasibility studies about incorporating residuals in ceramic mass so that the compositions obtained have satisfactory mechanical behavior and are in accordance with the specifications actually required for the production of ceramic coatings. How to cite this article.