Determinación de la resistencia a compresión del hormigón adicionado ceniza de cáscara de nuez

Abstract

This research aimed to compare the results obtained from the compression test of simple concrete specimens and concrete added walnut shell ash in partial substitution of cement. He began with the calcination of walnut shells between 500 to 600ºC to obtain the ash. Tests were carried out to determine the physical-mechanical properties of aggregates, cement and walnut shell ash according to NTE INEN standards, observing that they were efficient for mixing concrete. The calculation of the dosage was carried out by the Optimal Density Method for a concrete of 240 kg / cm2, with this we proceeded to elaborate the samples of simple concrete and with addition of ash in percentages of 0.5, 1, 1.5 and 2 percent, for which it was estimated 3 specimens per percentage and per day of test giving a total of 45. Finally, compression tests of simple concrete specimens and ash addition were carried out at 7, 14 and 28 days of age, which concluded that at 28 days there was an increase in compressive strength with additions of 0.5 and 1 percent with values of 325.66 and 335.45 kg / cm2 respectively, however, it was observed that with the addition of 1.5 and 2 percent it had a considerable decrease with values of 292.95 and 285.06 kg / cm2, demonstrating that this research had an important impact on the search for new ways to produce concrete.