Examinando por Autor "Lugo Mayor, José David"
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- PublicaciónAcceso abiertoEfecto de las cenizas volantes tratadas térmicamente como sustituto parcial del cemento en morteros(Universidad de San Buenaventura, 2014) Lugo Mayor, José David; Toro Perea, Edward FernandoIn this paper grade entitled "Effect of heat-treated fly ash as a partial replacement of cement in mortar," the effect of heat treatment in the fly ash of two sugar mills in the department of Valle del Cauca for possible use was studied as addition of cement mortars to evaluate the mechanical resistance to compression and consequent pozzolanic activity index properties. Prior to the heat treatment at two temperatures of 750 ° C and 900 ° C, the morphological, chemical and thermal characterization of fly ash was carried from the characterization techniques XRF, SEM, and TGA. Subsequent to this ashless mortars were prepared with untreated ash and heat-treated ash, which was substituted for 20% by weight of cement in order to evaluate the rate of pozzolanic activity at the age of 28 days and the mechanical resistance to three ages (14,28 and 60 days). The draft shows that statistically degree temperatures studied either be 750 ° C or 900 ° C increasing influence pozzolanic activity of the fly ashes and satisfactorily improve the mechanical properties of mortars.