Determinación de la correlación entre el ensayo de doble punzonamiento y de flexión de viga para hormigones reforzados con fibras

Abstract

The tests used to characterize the fiber reinforced concretes, HRF, are: beam tensile flexure test, EFNARC panel test, circular plate test and the Barcelona double punching test. In the present work, the existing correlations between the bending beam tensile test (ASTM C1609) and the double punching test (UNE 83515) are shown. For this propose, material that was found in quarries near the city was used. In order to find a correlation between both trials, a series of test hypotheses was established, raised by (Aire, Molins, Aguado, & Zárate, 2014), defining the variables that will be evaluated in each trial. These variables are the tenacity measured from the maximum load for the double punching test and the energy absorption for the beam test. In terms of tenacity, an average coefficient of variation of 12% and 16% was obtained for the flexo tensile test in beams for resistances of 350 kg/cm2 and 500 kg/cm2 correspondingly. In contrast, for the double punching test, the coefficients of average variation were 6% and 14% for the resistances mentioned above. In addition, good correlations were found between the tenacity of the double punching test, and the tenacity of the flexo tensile test of beams. The correlations found have a coefficient of determination R2 comprised between a range of 0.899 to 0.998, so it is inferred that the tests are fulfilling the hypotheses proposed.