RT info:eu-repo/semantics/article
T1 Durability of reinforced concrete with additions of natual pozzolans of volcanic origin
A1 Souto Suárez, Roberto
A1 Santana, Juan José
A1 Rodríguez Brito, Natalia
A1 Blanco-Peñalver, Concepción
A1 Mena, Vicente
A2 Química
A2 Grupo de Electroquímica y Corrosión
Departamento de Química
Instituto de Materiales y Nanotecnología
AB In this work, the properties of concrete modified with dosages of natural pozzolans(NP) in substitution of cement or superfine aggregates were evaluated. Proportions of 20/80 pozzolan/cement or pozzolan/superfine aggregates were selected for the additions of quarry and tuffpozzolans. Pozzolanic activity, durability, compressive strength, characteristic resistance, settlingconsistency, density, electrical resistivity, depth of water penetration, accessible porosity, and carbonation and chloride penetration were determined for the resulting concrete mixtures, and they weresubsequently compared to the values obtained for the reference concrete batches without additions.The results of the cementitious mixtures supplemented with tuff (PZT) and quarry (PZQ) pozzolans,expressed in mmol/L, are consistent with the pozzolanism test, with [Ca(OH)2]/[OH−] ratios at7 days are 6.03/60.19 for PZQ and 1.78/92.78 PZT. In addition to the pozzolanic activity at thesedosages, the characteristic resistance and durability parameters required by EHE-08 were verified.Particular attention was given to the determination of the diffusion of chloride ions, introducing aninstrumental modification of the accelerated integral method. The modification provides values ofdiffusion coefficients similar to those obtained by the other methods with the advantage of greaterstability and quality of the measurement.
YR 2022
FD 2022
LK http://riull.ull.es/xmlui/handle/915/34571
UL http://riull.ull.es/xmlui/handle/915/34571
LA en
NO Santana, J.J.; Rodríguez-Brito, N.; Blanco-Peñalver, C.; Mena, V.F.; Souto, R.M. Durability of Reinforced Concrete with Additions of Natural Pozzolans of Volcanic Origin. Materials 2022, 15, 8352. https://doi.org/10.3390/ma15238352
NO Materials, 15 (2022) 8352, 18 pp. https://doi.org/10.3390/ma15238352
DS Repositorio institucional de la Universidad de La Laguna
RD 09-may-2024