Abstract

GUAMAN,, Galo; UBIDIA,, Carlos  and  GUALPA,, Wilman. Characterization and Evaluation of Pozzolanic Tuffs in Southern Ecuador, Case Study "Yamana" Canton Paltas, Province of Loja. Rev Politéc. (Quito) [online]. 2021, vol.47, n.2, pp.41-52. ISSN 2477-8990.  https://doi.org/10.33333/rp.vol47n2.04.

This article presents the results of the evaluation of the pozzolanic activity of tuffs in Barrial Blanco of South Ecuador. The methodology includes physical (fineness modulus, pozzolanity index, rock density), chemical (loss on ignition, x-ray fluorescence and x-ray diffraction) and geophysical tests (vertical electrical tomography), pozzolanic activity was determined from compressive strength, according to ASTM C311 and C618. Said deposit has as a resource a total of 323 680 030 Tm of binder material with an average pozzolanity index of 83.91%, determined from an average resistance of 11.74 MPa of shear resistance considering the dosage specified for the development of the trial. At the same time, it has a great advantage as it has a 0.00109 m3 / Ton of uncovering coefficient, since the rocks emerge on the surface. Finally, the deposit is categorized at the indicated resource level within the margins of the JORC (1999) classification of resources and reserves, since it has a reasonable level of confidence, but not a high degree of certainty.

Keywords : pozzolana; pozzolanic tuffs; resources; Yamana; Barrial Blanco.

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