RT Journal Article
T1 Different evolution of tensile and compressive strength in concrete affected by acid mine drainage
A1 Dávila Martín, José Miguel
A1 Miguel Sarmiento, Aguasanta
A1 Grande Gil, José Antonio
A1 Luís, Ana Teresa
K1 Civil Engineering
AB Although 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.
PB Elsevier
SN 0950-0618
SN 1879-0526 (electrónico)
YR 2023
FD 2023
LK https://hdl.handle.net/10272/22325
UL https://hdl.handle.net/10272/22325
LA eng
NO Davila, 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. https://doi.org/10.1016/j.conbuildmat.2023.132351
NO This work was supported by MCIN/AEI/10.13039/501100011033/FEDER, UE (PID2021-123130OB-I00), the Regional Government ofAndalucia (FEDER Operational Programme 2014-2020, UHU-202053)and the Huelva University (EPIT 2021, UHUPJ0001-624).Funding for open access charge: University of Huelva / CBUA
DS Repositorio Institucional de la Universidad de Huelva
RD 29 may 2026