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dc.contributor.authorDávila Martín, José Miguel 
dc.contributor.authorMiguel Sarmiento, Aguasanta 
dc.contributor.authorGrande Gil, José Antonio 
dc.contributor.authorLuís, Ana Teresa
dc.identifier.citationDavila, J. M., Sarmiento, A. M., Grande, J. A., & Luís, A. T. (2023). Different evolution of tensile and compressive strength in concrete affected by acid mine drainage. In Construction and Building Materials (Vol. 397, p. 132351). Elsevier BV.
dc.identifier.issn1879-0526 (electrónico)
dc.description.abstractAlthough not many studies have analysed the effects of acid mine drainage (AMD) on the durability of concrete, it is clear that such an aggressive environment affects the different mechanical parameters of this material. AMD is an environmental problem that affects the five continents and is especially widespread in the south western part of the Iberian Peninsula, in an area known as the Iberian Pyrite Belt. In this work, the effect of AMD on tensile and compressive strength of concrete has been evaluated, analysing the evolution of these two fundamental parameters on this structural material. For this purpose, a series of concrete samples were subjected to a controlled AMD environment in the laboratory, using water with pH 2.8 collected from the Tharsis Mine (SW Spain). The concrete samples were prepared in accordance with the parameters required by various international standards. The samples were subjected to the aggressive environment by AMD for two periods of time (3 and 6 months), after which they were subjected to non-destructive testing and destructive testing until breaking the samples by means of compression and tensile (indirect tensile test). In addition, Emission Scanning Electron Microscopy studies were performed on samples before AMD influence and on samples affected by AMD for six months. The obtained results using the ultrasonic equipment showed a decrease in concrete quality, an increase in porosity and permeability, the reduction of modulus of elasticity that reaches 8.5% after six months, as well as the appearance of microcracks. The destructive the tests showed that tensile strength is much more affected than the compressive strength: the tensile strength went from 4.31 MPa to 3.27 MPa (24%) after six months, while the compressive strength went from 48.22 MPa to 43.83 MPa (9%) in the same period of time. This different evolution means that the formulas used in international standards that relating compressive strength to tensile strength need to be modified by means of a correction factor.es_ES
dc.description.sponsorshipThis work was supported by MCIN/AEI/10.13039/501100011033/ FEDER, UE (PID2021-123130OB-I00), the Regional Government of Andalucia (FEDER Operational Programme 2014-2020, UHU-202053) and the Huelva University (EPIT 2021, UHUPJ0001-624). Funding for open access charge: University of Huelva / CBUAes_ES
dc.relation.isversionofPublisher’s version
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subjectCivil Engineeringes_ES
dc.subject.otherAcid Mine Drainagees_ES
dc.subject.otherTensile strengthes_ES
dc.subject.otherUltrasonic testses_ES
dc.subject.otherDestructive testses_ES
dc.titleDifferent evolution of tensile and compressive strength in concrete affected by acid mine drainagees_ES
dc.subject.unesco3305.06 Ingeniería Civiles_ES
dc.subject.unesco3305.32 Ingeniería de Estructurases_ES
dc.subject.unesco3318.99 Otrases_ES

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