Stabilization of Industrial By-Products in Mortars Containing Metakaolin


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Title: Stabilization of Industrial By-Products in Mortars Containing Metakaolin

Author(s): M. Cyr, R. Idir, G. Escadeillas, S. Julien, and N. Menchon

Publication: Special Publication

Volume: 242


Appears on pages(s): 51-62

Keywords: compressive strength; flexural strength; heavy metals; leaching; metakaolin; municipal solid waste incineration fly ash; sewage sludge ash; shrinkage; waste.

Date: 4/1/2007

This study concerns the possibility of reusing two industrial by-products from combustion processes (MSWIFA -- Municipal Solid Waste Incineration Fly Ash and SSA -- Sewage Sludge Ash) in cement-based materials containing metakaolin. The experimental program included tests on mortars to evaluate the impact of ternary binders (cement, metakaolin and residue) on the technological and environmental properties of concrete intended for non-structural applications. The binders were composed of 75% cement, 22.5% metakaolin and 2.5% residue. Results on the technological and environmental behaviour of mortars showed that the mechanical, dimensional and leaching properties were not affected by the residues. The use of metakaolin especially led to a significant decrease in soluble fractions and heavy metals released from the binder matrix.