Implementación de un procedimiento que estime resistencias a compresión en pasta de cemento por termometría, en la empresa Unión Cementera Nacional UCEM S.A – Planta Chimborazo.

Abstract

To estimate the cement paste compression resistance, through the thermometry (or calorimetric method, which allows to predict the resistance of type IP and Type HE cement in less than 24 hours, for the ages of 1,3,7 and 28 days. Through equations use (or empirical relations), based on the fact that compression resistances are the product of the hydration reaction of the cement main compounds, when it is in contact with water, giving rise to an exothermic reaction that releases heat. Therefore, the maximum temperature difference in the first hours of hydration was determined, and it was related to the resistance obtained with the method of the INEN 488:2009 Standard. Both simple and multivariate regression were applied considering other cement properties, being found good expressions as a result for the IP type cement of 0.96 and 0.95 of its correlation. According to the results obtained through the line equation, the percentage of average error for Type IP cement was 3.61% and 2.61% for Type HE. In general, it can be said that the calorimetric method (thermometry) is reliable to determine and/ or predict compression resistances in less time.