Materiales de Construcción, Vol 39, No 216 (1989)

Influence on the physical-mechanical properties of portland-cement mortar, have admixtures of colophony and tannin


https://doi.org/10.3989/mc.1989.v39.i216.793

M. Fernández Cánovas
E. T. S. Ingenieros de Caminos. Madrid, Spain

N. Hurtado Selva
E. T. S. Ingenieros de Caminos. Madrid, Spain

G. M. Kawiche
E. T. S. Ingenieros de Caminos. Madrid, Spain

Abstract


The colophony has been used as an admixture in the Portland cement mortar with the intention to observe its influence on the air content, water absorption, adhesive capacity and mechanical properties. The results obtained have shown that, the colophony acts as air entrainment, reduces the permeability and improves the adhesion between the past and aggregates. Likewise, the addition of tannin and montan wax to the colophony has the efect of reducing the formation of foam and improves the impermeability of the mortar.

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