Resistencia química del hormigón. XIX. Acción de una disolución saturada de yeso: influencia de la adición de escoria a un cemento Portland. Evolución de las resistencias mecánicas a flexotracción y de los coeficientes de corrosión

Abstract

In the present paper, third of the new series started with and industrial portland cement, there is studied the influence exerted by the addition of different quantities of slag to an industrial portand cement (cement 3 < > P-450) in its chemical-resistant behavior when subjected, during various periods of time, to the action of a saturated dissolution of gypsum determining the evolution of the chemical resistance by the Koch-Steinegger method, as well as the mechanical resistances to flexotraction of mortar specimens (1:3) of 1 X 1 X 6 cm manufactured with the cement 3 and with the mixtures cement 3/slag = 85/15, 65/35, 40/60 and 30/70 in weight, sinking in filtered potable water a series of twelve (12) specimens and in a saturated dissolution of gypsum similar to the previous one, during 56-90-180 and 360 days, after having cured them during twenty four (24) hours in an enclosure saturated of humidity at 20 ± 2°C and, following, twenty one (21) days under filtered potable water. In this work there has been shown the favorable action that, from a mechanical-resistant point of view, is exerted by the addition of slag, in a special manner, of high quantities, to cement 3.