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DESTEFANI, A. Z.  and  HOLANDA, J. N. F.. Use of simplex lattice experimental design in the study of ornamental rock waste as filler to obtain maximum compaction. Cerâmica [online]. 2011, vol.57, n.344, pp.491-498. ISSN 0366-6913.

The use of industrial aggregates has grown over the years to meet the great demand of the civil construction due to the country's economical growth. The aim of this work was to use the experimental design in Simplex Lattice to evaluate the effect of the addition of ornamental rock waste as filler in the composition of ternary mixtures (crushed rock 0, stone powder, rock waste), leading to maximum compaction (maximum apparent dry density). Sixteen experimental points were taken, whose contents of the used materials ranged from 0 to 100%. The complete cubic simplex model showed to best fit to the experimental results, which results in more statistically appropriated responses to the studied compositions. The response surface generated indicated that the maximum apparent dry density (2.0 g/cm3) was obtained for the ternary composition: 63% crushed rock 0/ 17% stone powder/ 20% ornamental rock waste. Therefore, the use of ornamental rock waste as filler in aggregates for civil construction can be a viable alternative for final deposition in an environmental correct way.

Keywords : rock waste; filler; experimental design; simplex; aggregate.

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