Inhibición de la reacción álcali-sílice usando puzolana del volcán Tungurahua. Método de la barra de mortero.

Abstract

In this investigation the issue of the use of natural pozzolana from the Tungurahua volcano was addressed, as a means to inhibit the alkali-silica reaction in aggregates that, due to their mineralogical composition, are affected by these types of problems that cause expansions in the concrete, leading to cracks and, in extreme cases, failure planes, seriously affecting life useful of the structures. The main objective of the research was to obtain the percentage of replacement by weight of cement by ash from the Tungurahua volcano, with which it was possible to control the alkali-silica reaction, for this, mortar bars with ash percentages of 0%, 5 %, 10%, 15% and 25% of the cement weight, and following the methodology established in the ASTM C1567-2013 standard, the potential reactivity was determined for each percentage of ash in combination with the aggregate used. According to the analysis carried out, it was obtained that the percentage of ash with which it was possible to have a harmless behavior of the aggregate / cementing material combination was from 10%, thus controlling the alkali-silica reaction and avoiding significantly affecting the mechanical resistance of concrete due to the inclusion of pozzolana.