RT info:eu-repo/semantics/article
T1 Quantification and characterization of the microstructural damage of recycled aggregate self-compacting concrete under cyclic temperature changes
A1 Revilla Cuesta, Víctor
A1 Skaf Revenga, Marta
A1 Chica Páez, José Antonio
A1 Ortega López, Vanesa
A1 Manso Villalaín, Juan Manuel
K1 Self-compacting concrete
K1 Recycled aggregate
K1 Cyclic temperature change
K1 Thermal internal damage
K1 Microstructural characterization
K1 Indicator non-destructive property
K1 Ingeniería civil
K1 Civil engineering
K1 Materiales de construcción
K1 Building materials
AB Recycled Aggregate (RA) usually increases porosity and weakens Interfacial Transition Zones (ITZs) of concrete,which favors the appearance of internal thermal damage. Four Self-Compacting Concrete (SCC) mixes withcoarse and fine RA were subjected to positive and negative cyclic temperature variations to characterize theirthermal damage and quantify its effects. Two damage mechanisms were found. On the one hand, micro-cracksappeared in the ITZs. On the other hand, micro-cracks arose from the micro-pores and propagated through thecementitious matrix. Both damage mechanisms were promoted by the use of coarse and fine RA, respectively.The damage was most notable at sub-zero temperatures and when adding coarse RA. Furthermore, it primarilyaffected compressive strength, although ultrasonic pulse velocity and hardened density also decreased, whichserved as non-destructive indicators to indirectly quantify the level of thermal internal damage of SCC.
PB Elsevier
SN 0167-577X
YR 2023
FD 2023-02
LK http://hdl.handle.net/10259/7477
UL http://hdl.handle.net/10259/7477
LA eng
NO This work was funded by MICINN, AEI, EU, ERDF and NextGenerationEU/PRTR [PID2020-113837RB-I00; 10.13039/501100011033; TED2021-129715B-I00; FPU17/03374]; JCyL and ERDF [UIC-231]; and the University of Burgos [SUCONS, Y135.GI].
DS Repositorio Institucional de la Universidad de Burgos
RD 30-abr-2024