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Uso de lodo de estação de tratamento de água centrifugado em matriz de concreto de cimento portland para reduzir o impacto ambiental

2006; Brazilian Chemical Society; Volume: 29; Issue: 1 Linguagem: Inglês

10.1590/s0100-40422006000100016

1678-7064

Cinthya Hoppen, Kleber Franke Portella, Alex Joukoski, Eduardo Marques Trindade, Cleverson Vitório Andreoli,

Recycled Aggregate Concrete Performance

REDUCINGTHE ENVIRONMENTAL IMPACT.An alternative application of the humid sludge from the Passaúna WTP, located in Curitiba's metropolitan area, is proposed for concrete structures, partially replacing aggregates and cement.For the investigation, a reference concrete and four concrete mixtures with sludge were produced, and from these, two mixtures, containing 4% and 8% of sludge (m/m), were analyzed by different techniques: X ray fluorescence, X ray diffraction, thermogravimetric analysis, physicochemical analysis, compressive strength, etc.The properties were evaluated and the results indicate that the mixtures can be applied in different situations as cast structures for construction of concrete walls.Mixtures with more than 4% of sludge are restricted to applications where the workability of the concrete is not required, such as for residential pavements, sidewalks and stepping floors.