Use Of Mix Of Clay/Solid Waste From Steel Works For Civil Construction Materials  

Oleh:

Oliveira, Geiza E. ; Holanda, José Nilson F.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 22 no. 5 (Oct. 2004), page 358-363.
Topik: Steel works solid waste; recycling; leaching; civil construction materials; wmr 672–1
Fulltext: 358.pdf (404.02KB)

Isi artikel

The present study focuses on the use of solid waste generated by the steel works in Brazil for manufacturing clay-based structural products. The waste sample was characterized regarding chemical composition, X-ray diffraction, particle size, morphology, specific surface and plastic properties. The waste was added in gradual proportions to a kaolinitic clay from zero up to 3 wt.%. Ceramic bodies were formed by vacuum extrusion and fired at 950° C. The physical-mechanical properties (linear shrinkage, water absorption, apparent density and flexural strength) of the resulting clay/solid waste mixtures were determined. In addition, leaching tests were performed according Brazilian Standards as well as a preliminary analysis of gases evolved during the thermal process. It was found that the solid waste is formed by irregular particles, ranging in size from 1 to 500 µm. The test results indicate that solid wastes generated by steel works can be used as filler in construction materials, thereby increasing reuse in an environmentally safe manner.

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