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L.A. Pereira de Oliveira, J.P. Castro Gomes, M.C.S. Nepomuceno
The influence of wastes materials on the rheology of rendering mortars
Appl. Rheol. 23:1 (2013) 15505 (11 pages)
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The objective of this paper is to present the results of a research about the effect of mineral additions and specific lightweight
aggregates obtained from wastes materials (crushed EPS and cork) on the rheological properties of renderings mortars.
Four series of mortar formulations were prepared. Each series was composed by four mortars mixes with different mineral
additions: hydrated lime, glass powder, tungsten mine waste mud, and metakaolin. The proportions of the mortars
expressed in terms of apparent volume of cement, mineral addition and sand was 1:1:5. Flowability of mortar was measured
using a standard flow table test. The density and the water retention capacity of mortars were also determined. The mortar
rheological parameters were evaluated using a rheometer. The results show that the mortar yield stress is strongly influenced
by the water amount, binder fineness and mineral addition nature. The mortars plastic viscosity is also influenced by the
nature of mineral addition and the partial replacement of sand by EPS aggregates introduce incongruent values, caused by
the segregation, in the mortar yield stress, whereas, the cork aggregates is responsible by the yield stress reduction.
► Cite this publication as follows:
PereiradeOliveira LA, CastroGomes JP, Nepomuceno M: The influence of wastes materials on the rheology of rendering mortars, Appl. Rheol. 23 (2013) 15505.
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